A 2 V, 10 b, 20 Msample/s, mixed-mode subranging CMOS A/D converter. - Michio Yotsuyanagi; Hiroshi Hasegawa; Motoi Yamaguchi; Masaki Ishida; Kazuya Sone (IEEE J. Solid State Circuits, 1995)

Algebraic multidimensional phase unwrapping and zero distribution of complex polynomials-characterization of multivariate stable polynomials. - Isao Yamada; Kaoru Kurosawa; Hiroshi Hasegawa; Kohichi Sakaniwa (IEEE Trans. Signal Process., 1998)

A Simple Least-Squares Design of M-D IIR Filters with Fixed Separable Denominator Based on Multivariate Division Algorithm. - Hiroshi Hasegawa; Isao Yamada; Kohichi Sakaniwa (Multidimens. Syst. Signal Process., 2000)

A hidgher order generalization of an alias-free discrete time-frequency analysis. - Hiroshi Hasegawa; Yasuhiro Miki; Isao Yamada; Kohichi Sakaniwa (ICASSP, 2002)

A truncated polynomial interpolation theorem and its application to the WLS design of IIR filters. - Hiroshi Hasegawa; Masashi Nakagawa; Isao Yamada; Kohichi Sakaniwa (ISCAS (5), 2002)

A Higher Order Generalization of an Alias-Free Discrete Time-Frequency Analysis. - Hiroshi Hasegawa; Yasuhiro Miki; Isao Yamada; Kohichi Sakaniwa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

A Truncated Polynomial Interpolation and Its Application to Polynomially WLS Design of IIR Filters. - Hiroshi Hasegawa; Masashi Nakagawa; Isao Yamada; Kohichi Sakaniwa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

An adaptive super-resolution of videos with noise information on camera systems. - Toshiyuki Ono; Hiroshi Hasegawa; Isao Yamada; Kohichi Sakaniwa (ICASSP (2), 2005)

A color super-resolution with multiple nonsmooth constraints by hybrid steepest descent method. - Ryota Sasahara; Hiroshi Hasegawa; Isao Yamada; Kohichi Sakaniwa (ICIP (1), 2005)

An Iterative MPEG Super-Resolution with an Outer Approximation of Framewise Quantization Constraint. - Hiroshi Hasegawa; Toshiyuki Ono; Isao Yamada; Kohichi Sakaniwa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

A Consideration on System Requirements for Interactive Information System while Driving. - Ichiro Yuyama; Masami Sobata; Hiroshi Hasegawa (ICN/ICONS/MCL, 2006)

Improvement of Accuracy of 3D Structure Reconstruction from Interlaced Video Sequence. - Ichiro Yuyama; Yuta Takano; Masami Sobata; Yoko Seki; Hiroshi Hasegawa; Yu Watanabe (ICDS, 2007)

Suppression of Boundary Effect and Introduction of Scale Correlation for Wavelet based Traffic Prediction. - Naoya Matsusue; Hiroshi Hasegawa; Ken-ichi Sato (MMSP, 2007)

Usability Evaluation of Finger Pointer for Home-Use Display. - Ichiro Yuyama; Shigeki Takiura; Yasumasa Numata; Hiroshi Hasegawa; Yu Watanabe (MMSP, 2007)

Formulation of Waveguide Connection for Waveband MUX/DEMUX Using Concatenated Arrayed-Waveguide Gratings. - Shoji Kakehashi; Hiroshi Hasegawa; Ken-ichi Sato; Osamu Moriwaki (IEICE Trans. Commun., 2007)

Prospects and Challenges of Multi-Layer Optical Networks. - Ken-ichi Sato; Hiroshi Hasegawa (IEICE Trans. Commun., 2007)

An Edge-Preserving Super-Precision for Simultaneous Enhancement of Spacial and Grayscale Resolutions. - Hiroshi Hasegawa; Toshinori Ohtsuka; Isao Yamada; Kohichi Sakaniwa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Optical Cross-Connect Switch Architectures for Hierarchical Optical Path Networks. - Shoji Kakehashi; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2008)

Quasi-Dynamic Network Design Considering Different Service Holding Times. - Koichi Kanie; Hiroshi Hasegawa; Ken-ichi Sato (IEEE J. Sel. Areas Commun., 2008)

An efficient hierarchical optical path network design algorithm based on a traffic demand expression in a cartesian product space. - Isao Yagyu; Hiroshi Hasegawa; Ken-ichi Sato (IEEE J. Sel. Areas Commun., 2008)

Adaptive Plan system with Genetic Algorithm using the Variable Neighborhood range Control. - Sousuke Tooyama; Hiroshi Hasegawa (IEEE Congress on Evolutionary Computation, 2009)

Facilitation of listening comprehension by visual information under noisy listening condition. - Chiho Kashimada; Takumi Ito; Kazuki Ogita; Hiroshi Hasegawa; Kazuo Kamata; Miyoshi Ayama (Human Vision and Electronic Imaging, 2009)

Study on Finger Pointers Using Gray Theory. - Yasumasa Numata; Ichiro Yuyama; Hiroshi Hasegawa; Yu Watanabe (ICDS, 2009)

Optical Networking Technologies That Will Create Future Bandwidth-Abundant Networks [Invited]. - Ken-ichi Sato; Hiroshi Hasegawa (JOCN, 2009)

Creative and Inventive Design Support System: Systematic Approach and Evaluation Using Quality Engineering. - Hiroshi Hasegawa; Yuki Sonoda; Mika Tsukamoto; Yusuke Sato (DCC, 2010)

Wavelength Assignment for Concatenated ROADM Ring Networks and Switch Scale Reduction in a Concatenating Node. - Kiyo Ishii; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2010)

Hierarchical Optical Path Network Design Algorithm Considering Waveband Add/Drop Ratio Constraint. - Hai-Chau Le; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2010)

Efficient iterative design algorithm for enhancing resource utilization of shared protected optical path networks. - Masakazu Sato; Hiroshi Hasegawa; Ken-ichi Sato (DRCN, 2011)

Hybrid Approach for Improved Particle Swarm Optimization using Adaptive Plan System with Genetic Algorithm. - Pham Ngoc Hieu; Hiroshi Hasegawa (IJCCI (ECTA-FCTA), 2011)

Compact Matrix-Switch-Based Hierarchical Optical Path Cross-Connect with Colorless Waveband Add/Drop Ratio Restriction. - Ryosuke Hirako; Kiyo Ishii; Hiroshi Hasegawa; Ken-ichi Sato; Osamu Moriwaki (IEICE Trans. Commun., 2011)

Development of Hierarchical Optical Path Cross-Connect Systems Employing Wavelength/Waveband Selective Switches. - Kiyo Ishii; Shinichi Mitsui; Hiroshi Hasegawa; Ken-ichi Sato; Shin Kamei; Masayuki Okuno; Hiroshi Takahashi (JOCN, 2011)

Hybrid-hierarchical optical path network design algorithms utilizing ILP optimization. - Hai-Chau Le; Hiroshi Hasegawa; Ken-ichi Sato (Opt. Switch. Netw., 2011)

A dynamic and quasi-centralized RWA method for optical fast circuit switching networks employing route pre-prioritization. - Hiroaki Ohno; Hiroshi Hasegawa; Ken-ichi Sato (Opt. Switch. Netw., 2011)

Modified Self-adaptive Strategy for Controlling Parameters in Differential Evolution. - Tam Bui; Hieu Pham; Hiroshi Hasegawa (AsiaSim (2), 2012)

Differential Evolution for Adaptive System of Particle Swarm Optimization with Genetic Algorithm. - Pham Ngoc Hieu; Hiroshi Hasegawa (IJCCI, 2012)

Hybrid Integration of Differential Evolution with Artificial Bee Colony for Global Optimization. - Bui Ngoc Tam; Pham Ngoc Hieu; Hiroshi Hasegawa (IJCCI, 2012)

Adaptive system of swarm intelligent with Genetic Algorithm for global optimization. - Hieu Pham; Hiroshi Hasegawa (SMC, 2012)

Novel wavelength tunable filter offering multi-stage selection for colorless, directionless, and contentionless ROADMs. - Tomonobu Niwa; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe; Hiroshi Takahashi; Masayuki Okuno (IEICE Electron. Express, 2012)

Router Power Reduction through Dynamic Performance Control Based on Traffic Predictions. - Hiroyuki Ito; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2012)

Virtual Fiber Networking and Impact of Optical Path Grooming on Creating Efficient Layer One Services. - Fumisato Naruse; Yoshiyuki Yamada; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2012)

Optical Fast Circuit Switching Networks Employing Dynamic Waveband Tunnel. - Takahiro Ogawa 004; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2012)

Impact of Elastic Optical Paths That Adopt Distance Adaptive Modulation to Create Efficient Networks. - Tatsumi Takagi; Hiroshi Hasegawa; Ken-ichi Sato; Yoshiaki Sone; Akira Hirano; Masahiko Jinno (IEICE Trans. Commun., 2012)

Optical Node Architectures That Utilize Dedicated Add/Drop Switches to Realize Colorless, Directionless and Contentionless Capability. - Yoshiyuki Yamada; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2012)

Effects of Optical Layer Protection Granularity in Survivable Hierarchical Optical Path Network. - Yoshiyuki Yamada; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2012)

Evaluations of OXC Hardware Scale and Network Resource Requirements of Different Optical Path Add/Drop Ratio Restriction Schemes [Invited]. - Fumisato Naruse; Yoshiyuki Yamada; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2012)

Design strategies for survivable Grouped Routing Entity (GRE)-based optical networks. - Hiroshi Hasegawa; Yuki Taniguchi; Ken-ichi Sato; Amornrat Jirattigalachote; Paolo Monti 001; Lena Wosinska (DRCN, 2013)

OXC hardware scale reduction attained by using interconnected subsystem architecture. - Yuto Iwai; Hiroshi Hasegawa; Ken-ichi Sato (OFC/NFOEC, 2013)

A 270 × 270 optical cross-connect switch utilizing wavelength routing with cascaded AWGs. - Tomonobu Niwa; Hiroshi Hasegawa; Ken-ichi Sato (OFC/NFOEC, 2013)

Compact integrated tunable filter utilizing AWG routing function and small switches. - Tomonobu Niwa; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe; Hiroshi Takahashi; S. Soma (OFC/NFOEC, 2013)

Impact of wavelength/waveband convertors and the cost bound in hierarchical optical path networks. - Zhishu Shen; Hiroshi Hasegawa; Ken-ichi Sato (OFC/NFOEC, 2013)

Dynamic grouped routing optical networks for cost effective and agile wavelength services. - Yuki Taniguchi; Hiroshi Hasegawa; Ken-ichi Sato (OFC/NFOEC, 2013)

A large-scale wavelength routing optical switch for data center networks. - Ken-ichi Sato; Hiroshi Hasegawa; Tomonobu Niwa; Toshio Watanabe (IEEE Commun. Mag., 2013)

Efficient Shared Protection Network Design Algorithm that Iterates Path Relocation with New Resource Utilization Metrics. - Masakazu Sato; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2013)

Effectiveness of Wavelength/Waveband Conversion and Its Allowable Cost Bound for Hierarchical Optical Path Networks. - Zhishu Shen; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2013)

Coarse Granular Optical Routing Networks Utilizing Fine Granular Add/Drop. - Yuki Taniguchi; Yoshiyuki Yamada; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2013)

PCE-based fast path control in multi-domain photonic networks. - Yohei Iizawa; Soichiro Araki; Shinya Ishida; Itaru Nishioka; Kohei Shimada; Hiroshi Hasegawa; Ken-ichi Sato (Opt. Switch. Netw., 2013)

An efficient heuristic waveband assignment algorithm for hierarchical optical path networks utilizing wavelength convertors. - Zhishu Shen; Hiroshi Hasegawa; Ken-ichi Sato (Opt. Switch. Netw., 2013)

Low-loss and Low-power-consumption wavelength tunable filter enabling colorless/directionless/contentionless optical drop in ROADMs. - Shoichi Takashina; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (ECOC, 2014)

Verification of high frequency spectrum utilization in grouped optical path routing networks under traffic growth scenario. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2014)

Novel large-port-count optical-switch architecture for optical interconnection in datacenter. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (ECOC, 2014)

Using a Low-Cost Electroencephalogram (EEG) Directly as Random Number Generator. - Bhanupong Petchlert; Hiroshi Hasegawa (IIAI-AAI, 2014)

Hardware scale and performance evaluation of compact OXC add/drop architecture. - Hiroto Ishida; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

Fiber-nonlinearity limitation of transmission distances in ultra-dense gridless photonic networks. - Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

A 204.8 Tbps throughput 64×64 optical cross-connect prototype that allows C/D/C add/drop. - Kensuke Takaha; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2014)

Low crosstalk wavelength tunable filter that utilizes symmetric and asymmetric Mach-Zehnder interferometers. - Shoichi Takashina; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2014)

Performance evaluations of large-scale oxc that achieves modular and hitless expansion. - Yasuhiro Tanaka; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

Enhancement of fiber frequency utilization by employing grouped optical path routing. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2014)

Design of Grouped Routing Entity (GRE)-based optical networks with 100% signal quality guarantee. - Amornrat Jirattigalachote; Paolo Monti 001; Lena Wosinska; Yuki Taniguchi; Toshinori Ban; Hiroshi Hasegawa; Ken-ichi Sato (ONDM, 2014)

A novel flexible grid/semi-flexible grid optical path network design algorithm that reserves exclusive frequency slots for high bitrate signals. - Zhishu Shen; Hiroshi Hasegawa; Ken-ichi Sato (ONDM, 2014)

Large capacity optical networks applying multi-stage hetero-granular optical path routing. - Hai-Chau Le; Hiroshi Hasegawa; Ken-ichi Sato (Opt. Switch. Netw., 2014)

Editorial. - Jing Wu 012; Lena Wosinska; Carmen Mas Machuca; Anna Tzanakaki; Hiroshi Hasegawa (Opt. Switch. Netw., 2014)

Novel network control scheme that can substantially reduce link and node costs simultaneously. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2015)

Flexible waveband routing optical networks. - Hiroshi Hasegawa; Suresh Subramaniam 001; Ken-ichi Sato (ICC, 2015)

Comparison of OXC Node Architectures for WDM and Flex-Grid Optical Networks. - Jingxin Wu; Suresh Subramaniam 001; Hiroshi Hasegawa (ICCCN, 2015)

Router power reduction by active performance control realized with support vector machines. - Hiroshi Kawase; Hiroshi Hasegawa; Ken-ichi Sato (ICNC, 2015)

Wavelength path signalling for WSS/WBSS combined optical switches in hierarchical optical networks. - Takaya Miyazawa; Takahiro Hirayama; Hiroaki Harai; Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICTON, 2015)

Shape and Layout Understanding Method Using Brain Machine Interface for Idea Creation Support System. - Hiroshi Hasegawa; Syogo Shibasaki; Yusuke Ito (KES, 2015)

Global Iterative Closet Point Using Nested Annealing for Initialization. - Tao Ngoc Linh; Hiroshi Hasegawa (KES, 2015)

Shared protected grouped optical path routing network design employing iterative path group relocation. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (RNDM@WMNC, 2015)

Large scale optical cross-connect: Architecture, performance analysis, and feasibility demonstration. - Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2015)

Highly scalable subsystem modular OXC nodes that host tailored add/drop mechanism. - Hiroto Ishida; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2015)

A novel routing and frequency slot assignment scheme that can adapt to transmission speed migration. - Zhishu Shen; Taiki Kusano; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2015)

Demonstration of large-port-count and compact ROADM that exhibits virtual-C/D/C performance. - Shoichi Takashina; Hiroto Ishida; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2015)

Residual capacity aware dynamic control of GRE-based routing optical path networks under traffic growth model. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2015)

Large-scale optical-switch prototype compactly implemented with novel functional configuration. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Toshio Watanabe (OFC, 2015)

Resilient grouped routing optical networks with finely granular protection. - Hiroshi Hasegawa; Yojiro Mori; Ken-ichi Sato (ONDM, 2015)

Differential Reliability Path Accommodation Design and Reconfiguration in Virtualized Multi-Layer Transport Network. - Akihiro Kadohata; Takafumi Tanaka; Atsushi Watanabe; Akira Hirano; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2015)

Pre-Adjustment Rerouting for Wavelength Defragmentation in Optical Transparent WDM Networks. - Akihiro Kadohata; Atsushi Watanabe; Akira Hirano; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2015)

Hardware Scale and Performance Evaluation of a Compact Subsystem Modular Optical Cross Connect That Adopts Tailored Add/Drop Architecture. - Hiroto Ishida; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2015)

Integrity Enhancement of Flexible/Semi-Flexible Grid Networks That Minimizes Disruption in Spectrum Defragmentation and Bitrate-Dependent Blocking. - Zhishu Shen; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2015)

Criteria for Selecting Subsystem Configuration in Creating Large-Scale OXCs. - Yasuhiro Tanaka; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2015)

Spectrum utilization maximization in coarse granular optical routing networks that employ fine granular shared protection. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (DRCN, 2016)

Tipping point for the future scalable OXC - What size MxM WSS is needed? - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2016)

Highly spectral efficient elastic optical network employing grouped optical path routing. - Yuki Terada; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2016)

A compact OXC node architecture that exploits dynamic path bundling and routing. - Tomohiro Ishikawa; Hiroshi Hasegawa; Suresh Subramaniam 001; Ken-ichi Sato (ONDM, 2016)

Evaluation and performance modeling of two OXC architectures. - Jingxin Wu; Maotong Xu; Suresh Subramaniam 001; Hiroshi Hasegawa (Sarnoff Symposium, 2016)

Global Hybrid Registration for 3D Constructed Surfaces using Ray-casting and Improved Self Adaptive Differential Evolution Algorithm. - Tao Ngoc Linh; Hiroshi Hasegawa; Tam Bui (VISIGRAPP (4: VISAPP), 2016)

Survivable Grouped Routing Optical Networks with Dedicated Path Protection. - Hiroshi Hasegawa; Yojiro Mori; Ken-ichi Sato (IEICE Trans. Commun., 2016)

Node Architecture and Design of Flexible Waveband Routing Optical Networks. - Hiroshi Hasegawa; Suresh Subramaniam 001; Ken-ichi Sato (JOCN, 2016)

Disruption-Free Expansion of Protected Optical Path Networks that Utilize Subsystem Modular OXC Nodes. - Kosuke Sato; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2016)

Optimal nonuniform wavebanding in WDM mesh networks. - Jingxin Wu; Suresh Subramaniam 001; Hiroshi Hasegawa (Photonic Netw. Commun., 2016)

Dynamic Router Performance Control Utilizing Support Vector Machines for Energy Consumption Reduction. - Hiroshi Kawase; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (IEEE Trans. Netw. Serv. Manag., 2016)

First Demonstration of Subsystem-Modular Optical Crossconnect Using Single-Module 6×6 WSS. - Ryota Hashimoto; Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Keita Yamaguchi; Kazunori Seno; Kenya Suzuki (ECOC, 2017)

Joint Pre-, Inline-, and Post-Compensation of Spectrum Narrowing Caused by Traversing Multiple Optical Nodes. - Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2017)

Joint Banding-Node Placement and Resource Allocation for Multi-Granular Elastic Optical Networks. - Jingxin Wu; Maotong Xu; Suresh Subramaniam 001; Hiroshi Hasegawa (GLOBECOM, 2017)

Parameter-Free Global Hybrid Point Based Range Image Registration. - Linh Tao; Tinh Nguyen; Hiroshi Hasegawa (ICAIP, 2017)

Routing, fiber, band, and spectrum assignment (RFBSA) for multi-granular elastic optical networks. - Jingxin Wu; Maotong Xu; Suresh Subramaniam 001; Hiroshi Hasegawa (ICC, 2017)

Dynamic control of coarse/fine hybrid granular routing optical networks. - Yusaku Ito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Optical tunable filter for gridless ROADM. - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Novel intra- and inter-datacenter converged network exploiting space- and wavelength-dimensional switches. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Highly reliable large-scale optical cross-connect architecture utilizing M×M wavelength-selective switches. - Shuhei Yamakami; Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2017)

Dynamic Path Provisioning and Disruption-Free Reoptimization Algorithms for Bandwidth on-Demand Services Considering Fairness. - Masahiro Nakagawa; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2017)

Fast Optical Circuit Switch for Intra-Datacenter Networking. - Koh Ueda; Yojiro Mori; Hiroshi Hasegawa; Hiroyuki Matsuura; Kiyo Ishii; Haruhiko Kuwatsuka; Shu Namiki; Toshio Watanabe; Ken-ichi Sato (IEICE Trans. Commun., 2017)

Global ray-casting range image registration. - Linh Tao; Tam Bui; Hiroshi Hasegawa (IPSJ Trans. Comput. Vis. Appl., 2017)

Spectral Efficiency Maximization of Grouped Routing Optical Networks With Shared Protection. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Tipping Point for the Future Scalable OXC: What Size M × M WSS Is Needed? - Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Algorithm for Raising OXC Port Count to Meet Traffic Growth at Minimum Cost. - Kosuke Sato; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2017)

Novel Demodulation Framework Based on Quadrature Duo-Binary/Quaternary/Octernary Spectrum Shaping and MLSE for Mitigating Spectrum Narrowing Caused by Node Traversals. - Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2018)

Spectral utilization efficient coarse granular routing optical networks with resiliency against multiple failures. - Tomohiro Ishikawa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICIN, 2018)

Fragmentation-Minimized Transponder Upgrading Employing Channel Bandwidth Aligned Slot Allocation in Flexible Grid Optical Networks. - Hiroshi Hasegawa; Takuma Yasuda; Yojiro Mori; Ken-ichi Sato (OFC, 2018)

Spectrally Efficient and Highly Resilient Grouped Routing Network Enhanced with Optical Performance Monitoring. - Keisuke Kayano; Hiroshi Saito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Shoichiro Oda; Setsuo Yoshida; Takeshi Hoshida (OFC, 2018)

A New Framework for Nation-Wide Networking in Future Datacenter-Traffic Centric Era. - Keisuke Kayano; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Fumikazu Inuzuka; Akira Hirano (PSC, 2018)

Architecture and Design of Quasi-Nyquist WDM Networks with Flexible Grid Granular Switching. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (PSC, 2018)

Design and Verification of Large-Scale Optical Circuit Switch Using ULCF AWGs for Datacenter Application. - H. Nagai; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2018)

Enhancing Protection Performance by Effectively Using Spectral Slots of Impairment-Aware Elastic Optical Networks [Invited]. - Hitoshi Takeshita; Takefumi Oguma; Shinsuke Fujisawa; Yuta Suzuki; Baku Yatabe; Akio Tajima; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2018)

Joint Banding-Node Placement and Resource Allocation for Multigranular Elastic Optical Networks. - Jingxin Wu; Maotong Xu; Suresh Subramaniam 001; Hiroshi Hasegawa (JOCN, 2018)

Design of and Resiliency Enhancement in Coarse/Fine Hybrid Granular Routing Optical Networks Based on Iterative Path-Pair-Loop Inflation. - Keisuke Itakura; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (DRCN, 2019)

P-Cycle Design for Translucent Elastic Optical Networks. - Rujia Zou; Suresh Subramaniam 001; Hiroshi Hasegawa; Masahiko Jinno (GLOBECOM, 2019)

Dynamic Control of Transparent Optical Networks with Adaptive State-Value Assessment Enabled by Reinforcement Learning. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ICTON, 2019)

Verification of High Performance and Wide Applicability of Seamlessly Expandable and Limitless OXC. - Ryota Hashimoto; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2019)

Demonstration of Quasi-Nyquist WDM Networks using Widely Deployed Wavelength-Selective Switches. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2019)

Switching granularity and intra-node interconnection optimization for large scale optical nodes. - Hiroshi Hasegawa; Ken-ichi Sato (OECC/PSC, 2019)

Feasibility Test of Large-Scale (1, 424×1, 424) Optical Circuit Switches Utilizing Commercially Available Tunable Lasers. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OECC/PSC, 2019)

Evaluation of WSS Characteristics in Highly Dense WDM Networks. - Kazuya Okamura; Shuhei Yamaoka; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OECC/PSC, 2019)

Improved Optical Amplification Efficiency by Using Turbo Cladding Pumping Scheme for Multicore Fiber Optical Networks. - Hitoshi Takeshita; Keiichi Matsumoto; Hiroshi Hasegawa; Ken-ichi Sato; Emmanuel Le Taillandier de Gabory (IEICE Trans. Commun., 2019)

Assessment of Node- and Link- Level Blocking and Creating Cost-Effective Networks in the Era of Large Bandwidth Services. - Shuhei Yamakami; Masaki Niwa; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Fumikazu Inuzuka; Akira Hirano (IEICE Trans. Commun., 2019)

Efficient Dynamic Routing and Spectrum Assignment for Multifiber Elastic Optical Networks. - Jingxin Wu; Suresh Subramaniam 001; Hiroshi Hasegawa (JOCN, 2019)

Demonstration of 4.3 Pbps Optical Circuit Switching for Intra-Datacentre Networks Based on Spatial Super-Channels. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (ECOC, 2020)

Joint Pre-emphasis and Partial-response Coding for Spectrum Narrowing Caused by Repeated Optical-node Traversal in Ultra-dense WDM Networks. - Kazuya Okamura; Yojiro Mori; Hiroshi Hasegawa (ECOC, 2020)

High-Throughput Optical Circuit Switch for Intra-Datacenter Networks Based on Spatial Super-Channels. - Eiji Honda; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2020)

Dynamically Controlled Flexible-Grid Networks Based on Semi-Flexible Spectrum Assignment and Network-State-Value Evaluation. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2020)

High-Throughput and High-Port-Count Optical Cross- Connents Using Flexible Waveband Routing. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (ONDM, 2020)

Architecture and Design of Coarse/Fine Hybrid Granular Routing Optical Networks. - Yusaku Ito; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (IEICE Trans. Commun., 2020)

Assessment of Optical Node Architectures for Building Next Generation Large Bandwidth Networks. - Mungun-Erdene Ganbold; Takuma Yasuda; Yojiro Mori; Hiroshi Hasegawa; Fumikazu Inuzuka; Akira Hirano; Ken-ichi Sato (IEICE Trans. Commun., 2020)

Transmission-Quality-Aware Online Network Design and Provisioning Enabled by Optical Performance Monitoring. - Keisuke Kayano; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Shoichiro Oda; Setsuo Yoshida; Takeshi Hoshida (IEICE Trans. Commun., 2020)

Design of seamlessly and limitlessly expandable OXC and verification tests on its versatile applicability. - Ryota Hashimoto; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (JOCN, 2020)

Link-protection and FIPP p-cycle designs in translucent elastic optical networks. - Rujia Zou; Hiroshi Hasegawa; Masahiko Jinno; Suresh Subramaniam 001 (JOCN, 2020)

DRAMA: Disaster Management Algorithm with Mitigation Awareness for Elastic Optical Networks. - Rujia Zou; Hiroshi Hasegawa; Suresh Subramaniam 001 (DRCN, 2021)

DeepDRAMA: Deep Reinforcement Learning-based Disaster Recovery with Mitigation Awareness in EONs. - Rujia Zou; Nathaniel Bury; Hiroshi Hasegawa; Masahiko Jinno; Suresh Subramaniam 001 (GLOBECOM, 2021)

Design and Manufacture a Cheap Equipment to Measure Human Arm Motion in Developing Countries. - Thanh-Trung Nguyen; Ngoc-Tam Bui; Hiroshi Hasegawa (ICRCA, 2021)

Alzheimer Dementia Detection based on Circadian Rhythm Disorder of Heartrate. - Naoya Matsuda; Iko Nakari; Ryotaro Arai; Hiroyuki Sato; Keiki Takadama; Masanori Hirose; Hiroshi Hasegawa; Makoto Shiraishi; Takahide Matsuda (LifeTech, 2021)

Experimental Evaluation of Optical Cross-Connects with Flexible Waveband Routing Function for SDM Networks. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (OFC, 2021)

Design and Performance Evaluation of Resilient Optical Path Networks That Adopt Spatially-Jointed Flexible Waveband Routing. - Ryuji Munakata; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (ONDM, 2021)

Fragmentation-Minimized Periodic Network-Bandwidth Expansion Employing Aligned Channel Slot Allocation in Flexible Grid Optical Networks. - Hiroshi Hasegawa; Takuma Yasuda; Yojiro Mori; Ken-ichi Sato (IEICE Trans. Commun., 2021)

Enhancing the flexibility and functionality of SCNs: demonstration of evolution toward any-core-access, nondirectional, and contentionless spatial channel cross-connects [Invited]. - Masahiko Jinno; Tsubasa Ishikawa; Takahiro Kodama; Hiroshi Hasegawa; Suresh Subramaniam 001 (JOCN, 2021)

Design and control of highly spectrally efficient photonic networks enabled by fiber-granular routing on overlaid ring-shaped topologies. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato; Paolo Monti 001 (JOCN, 2021)

Efficient Network Capacity Expansion by Differentiated WDM-Density with Bandwidth-Variable Virtual Direct Links. - Kazuki Hayashi; Yojiro Mori; Hiroshi Hasegawa (FNWF, 2022)

A Preliminary Cyber-Physical Study of a VR Training Material for Engineering Students to Give a Presentation in English. - Taishi Akimoto; Kayoko H. Murakami; Atsuko K. Yamazaki; Tsukasa Yamanaka; Hiroshi Hasegawa (KES, 2022)

Demonstration of High-Throughput Intra-Datacenter Switches Using Interleaved AWGs for Nyquist WDM. - Takuma Kuno; Takumi Mitsuya; Yojiro Mori; Hiroshi Hasegawa; Ken-ichi Sato (OFC, 2022)

Design and Dynamic Control of Fiber-Granular Routing Networks with Next-Generation Optical Paths. - Takeshi Matsuo; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (OFC, 2022)

Power-saving Aware SDM Photonic Node with the Throughput Scalable to over Peta bit. - Fumikazu Inuzuka; Hiroshi Hasegawa; Kohki Shibahara; Hidenori Takahashi; Takehiro Tsuritani; Kazunori Seno; Naru Nemoto; Emmanuel Le Taillandier de Gabory; Shigeyuki Yanagimachi; Taiji Sakamoto; Kazuhide Nakajima; Masanori Takahashi; et al. (OECC/PSC, 2022)

Constellation-Shaped 64QAM Robust against Phase Noise in Intra-Datacenter Networks. - Jun Sakano; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (OECC/PSC, 2022)

Optical Performance Monitoring Using Adaptive FIR Filters for Constellation-Shaped Higher-Order QAM Signals. - Naoki Tsuchida; Takuma Kuno; Jun Sakano; Yojiro Mori; Hiroshi Hasegawa (OECC/PSC, 2022)

Spatially-Jointed Flexible Waveband Routing Optical Networks Adopting Shared Path Protection. - Ryuji Munakata; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (RNDM, 2022)

Introduction to the GLOBECOM 2022 Optical Networks and Systems Symposium Special Issue. - Hiroshi Hasegawa; Jason Jue; Krishna M. Sivalingam; Suresh Subramaniam 001 (JOCN, 2022)

Design and evaluation of a reconfigurable optical add-drop multiplexer with flexible wave-band routing in SDM networks. - Takuma Kuno; Yojiro Mori; Suresh Subramaniam 001; Masahiko Jinno; Hiroshi Hasegawa (JOCN, 2022)

Architecture and performance evaluation of fiber-granularity routing networks with supplemental grooming by wavelength conversion. - Takeshi Matsuo; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (JOCN, 2022)

DRAMA+: Disaster Management With Mitigation Awareness for Translucent Elastic Optical Networks. - Rujia Zou; Hiroshi Hasegawa; Masahiko Jinno; Suresh Subramaniam 001 (IEEE Trans. Netw. Serv. Manag., 2022)

PRODIGY: A Progressive Upgrade Approach for Elastic Optical Networks. - Shrinivas Petale; Shih-Chun Lin 002; Motoharu Matsuura; Hiroshi Hasegawa; Suresh Subramaniam 001 (GLOBECOM, 2023)

TABIMAE Mind Search System: Exploring Best Tourist Sightseeing Spots Match Mental Values before Travel. - Teppei Honda; Kimika Ymamoto; Hiroshi Hasegawa (KES, 2023)

Redefinition creative and inventive design support system: DX application design process. - Yuki Otsuka; Hiroshi Hasegawa (KES, 2023)

Architecture and Performance Evaluation of Bundled-path-routing Multi-band Optical Networks. - Ryuji Munakata; Takuma Kuno; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (OFC, 2023)

Cost-effective Network Capacity Enhancement with Multi-band Virtual Bypass Links. - Daisuke Saito; Yojiro Mori; Kohei Hosokawa; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2023)

Effective Capacity Estimation Based on Cut-Set Load Analysis in Optical Path Networks. - Kenji Cruzado; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (PSC, 2023)

4.71-Pbps-Throughput Multiband OXC Based on Space- and Wavelength-Granular Hybrid Switching. - Takuma Kuno; Takuro Ochiai; Reiji Higuchi; Kazato Satake; Kenji Cruzado; Ryuji Munakata; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (PSC, 2023)

Transceiver-Impairment Mitigation Enabled by Adaptive Symbol Decision with Neural Networks. - Takuro Ochiai; Reiji Higuchi; Takuma Kuno; Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (PSC, 2023)

Cost-effective network capacity upgrade by heterogeneous wavelength division multiplexing density with bandwidth-variable virtual direct links. - Kazuki Hayashi; Yojiro Mori; Hiroshi Hasegawa (JOCN, 2023)

Metropolitan Area Network Model Design Using Regional Railways Information for Beyond 5G Research. - Takuji Tachibana; Yusuke Hirota; Keijiro Suzuki; Takehiro Tsuritani; Hiroshi Hasegawa (IEICE Trans. Commun., 2023)

Policy-Based Grooming, Route, Spectrum, and Operational Mode Planning in Dynamic Multilayer Networks. - Takafumi Tanaka; Hiroshi Hasegawa (IEICE Trans. Commun., 2023)

Fronthaul Network Architecture and Design For Optically Powered Passive Optical Networks. - Egemen Erbayat; Shrinivas Petale; Shih-Chun Lin 002; Motoharu Matsuura; Hiroshi Hasegawa; Suresh Subramaniam 001 (ICC, 2024)

Development of a TRIZ-Based Design Methodology for Digital Transformation. - Yuki Otsuka; Hiroshi Hasegawa (TFC (2), 2024)

Capacity-Bound Evaluation and Routing and Spectrum Assignment for Elastic Optical Path Networks with Distance-Adaptive Modulation. - Kenji Cruzado; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Hiroshi Hasegawa (OFC, 2024)

Intra-datacenter Optical Circuit Switch Architecture with Multi-band Transmission Technologies. - Takuma Kuno; Reiji Higuchi; Kazato Satake; Hayato Yuasa; Yojiro Mori; Hiroshi Hasegawa (OFC, 2024)

Cost-Effective Capacity Enhancement of Survivable Optical Networks by Supplemental Band Expansion and Backup Resource Sharing. - Daisuke Saito; Yojiro Mori; Kohei Hosokawa; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2024)

DRAMA-DC: Disaster Recovery Algorithm with Mitigation Awareness in Data Center EONs. - Rujia Zou; Shih-Chun Lin 002; Motoharu Matsuura; Hiroshi Hasegawa; Suresh Subramaniam 001 (ONDM, 2024)

Digital Twin Enabled Data-Driven Approach for Traffic Efficiency and Software-Defined Vehicular Network Optimization. - Mohammad Sajid Shahriar; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (VTC Fall, 2024)

Prioritized Multi-Tenant Traffic Engineering for Dynamic QoS Provisioning in Autonomous SDN-OpenFlow Edge Networks. - Mohammad Sajid Shahriar; Faisal Ahmed; Genshe Chen; Khanh D. Pham; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (CoRR, 2024)

FedAuxHMTL: Federated Auxiliary Hard-Parameter Sharing Multi-Task Learning for Network Edge Traffic Classification. - Faisal Ahmed; Myungjin Lee; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (CoRR, 2024)

Flexible waveband routing node architecture for spatial-division and multi-band optical networks [Invited]. - Hiroshi Hasegawa (J. Opt. Commun. Netw., 2024)

Optical networking that exploits massive wavelength/spectrum and spatial parallelisms. - Hiroshi Hasegawa (J. Opt. Commun. Netw., 2024)

PRODIGY+: a robust progressive upgrade approach for elastic optical networks. - Shrinivas Petale; Aleksandra Knapinska; Egemen Erbayat; Piotr Lechowicz; Krzysztof Walkowiak; Shih-Chun Lin 002; Motoharu Matsuura; Hiroshi Hasegawa; Suresh Subramaniam 001 (J. Opt. Commun. Netw., 2024)

Bandwidth Abundant Optical Networking Enabled by Spatially-Jointed and Multi-Band Flexible Waveband Routing. - Hiroshi Hasegawa (IEICE Trans. Commun., 2024)

Demodulation Framework Based on Machine Learning for Unrepeated Transmission Systems. - Ryuta Shiraki; Yojiro Mori; Hiroshi Hasegawa (IEICE Trans. Commun., 2024)

Deep-Depth Probability-Maintained Notch Sequences for PAM. - Jingnan Li; Tong Ye; Xiaofei Su; Yangyang Fan; Ke Zhang; Shiyu Shi; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao; Yojiro Mori; Hiroshi Hasegawa (IEEE DataPort, 2024)

Introduction to the JOCN Special Issue on Spatial Parallelism for Next-Generation High-Capacity Transport Networks. - Yvan Pointurier; Hiroshi Hasegawa; Nihel Benzaoui; Jesse E. Simsarian (J. Opt. Commun. Netw., 2024)

Multi-Domain Computation-Aware Resource Slicing and Orchestration for 6G Programmable Converged Wireless-Optical Networks. - Shih-Chun Lin 002; Chia-Hung Lin; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa (NOMS, 2025)

Federated Deep Reinforcement Learning-Driven O-RAN for Automatic Multirobot Reconfiguration. - Faisal Ahmed; Myungjin Lee; Shao-Yu Lien; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (NOMS, 2025)

Multi-Tenant Traffic Prioritization and On-Demand QoS Provisioning in Digital Twin-Empowered Programmable Edge Networks. - Mohammad Sajid Shahriar; Faisal Ahmed; Genshe Chen; Khanh D. Pham; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (NOMS, 2025)

Demonstration of Multigranular-Routing Layered Network with Impairment-Aware Modulation Format Selection. - Hayato Yuasa; Takuma Kuno; Taisei Sekizuka; Yojiro Mori; Shih-Chun Lin 002; Motoharu Matsuura; Suresh Subramaniam 001; Wakako Maeda; Shigeyuki Yanagimachi; Hiroshi Hasegawa (OFC, 2025)

Optimizing Handover Decisions in Multi-Connectivity Enabled Terrestrial-Satellite Integrated Networks: A Deep Reinforcement Learning Approach. - Faisal Ahmed; Myungjin Lee; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (WCNC, 2025)

Enhancing Network Traffic Analysis in O-RAN Enabled Next-Generation Networks Through Federated Multi-Task Learning. - Faisal Ahmed; Myungjin Lee; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (WCNC, 2025)

Metropolitan Area Network Model Design Algorithm Using Regional Railways Information and Daily Movement Data for Beyond 5G Research. - Koga Nakamura; Shotaro Kitano; Yusuke Hirota; Takehiro Tsuritani; Hiroshi Hasegawa; Takuji Tachibana (IEEE Access, 2025)

DRAMA-PRO+: disaster recovery algorithm with mitigation awareness for protected translucent elastic optical networks. - Rujia Zou; Shih-Chun Lin 002; Motoharu Matsuura; Hiroshi Hasegawa; Gustavo B. Figueiredo; Suresh Subramaniam 001 (J. Opt. Commun. Netw., 2025)

Intelligent Edge Resource Provisioning for Scalable Digital Twins of Autonomous Vehicles. - Mohammad Sajid Shahriar; Suresh Subramaniam 001; Motoharu Matsuura; Hiroshi Hasegawa; Shih-Chun Lin 002 (CoRR, 2025)