A Fusion-Spliced Near-Field Optical Fiber Probe Using Photonic Crystal Fiber for Nanoscale Thermometry Based on Fluorescence-Lifetime Measurement of Quantum Dots. - Takuro Fujii; Yoshihiro Taguchi 002; Toshiharu Saiki; Yuji Nagasaka (Sensors, 2011)

50-Gbit/s operation of lateral pin diode structure electro-absorption modulator integrated DFB laser. - Koichi Hasebe; Tomonari Sato; Koji Takeda; Takuro Fujii; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2014)

Ultralow operating energy of directly modulated DFB laser on SiO2/Si substrate. - Shinji Matsuo; Takuro Fujii; Koichi Hasebe; Koji Takeda; Tomonari Sato; Takaaki Kakitsuka (ECOC, 2014)

25-Gbit/s direct modulation of photonic-crystal lasers with a 10.5-fJ/bit energy cost for on/off-chip optical interconnects. - Koji Takeda; Tomonari Sato; Takuro Fujii; Akihiko Shinya; Eiichi Kuramochi; Masaya Notomi; Koichi Hasebe; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2014)

Membrane distributed-reflector laser integrated with SiOx-based spot-size converter on Si platform. - Hidetaka Nishi; Takuro Fujii; Koji Takeda; Koichi Hasebe; Takaaki Kakitsuka; Tai Tsuchizawa; Tsuyoshi Yamamoto; Koji Yamada; Shinji Matsuo (ECOC, 2015)

High Performance Epitaxially Grown III-V Membrane Lasers on Si. - Takuro Fujii; Koji Takeda; Hidetaka Nishi; Shinji Matsuo (ECOC, 2017)

32-Gbit/s Heterogeneously Integrated Mach-Zehnder Modulator with 250μm-long III-V/Si MOS-capacitor Phase Shifter. - Tatsurou Hiraki; Takuma Aihara; Koichi Hasebe; Takuro Fujii; Koji Takeda; Takaaki Kakitsuka; Tai Tsuchizawa; Hiroshi Fukuda; Shinji Matsuo (ECOC, 2017)

Monolithically Integrated 4×4 Optical Switch with Cascaded MZIs and EAM-Gate Array. - Yusuke Muranaka; Tatsushi Nakahara; Salah Ibrahim; Takuro Fujii; Toru Segawa; Toshikazu Hashimoto; Ryo Takahashi (ECOC, 2017)

Heterogeneously integrated InP/Si metal-oxide-semiconductor capacitor Mach-Zehnder modulator. - Tatsurou Hiraki; Takuma Aihara; Koichi Hasebe; Takuro Fujii; Koji Takeda; Tai Tsuchizawa; Takaaki Kakitsuka; Hiroshi Fukuda; Shinji Matsuo (OFC, 2017)

Evaluation of Device Parameters for Membrane Lasers on Si Fabricated with Active-Layer Bonding Followed by Epitaxial Growth. - Takuro Fujii; Koji Takeda; Erina Kanno; Koichi Hasebe; Hidetaka Nishi; Tsuyoshi Yamamoto; Takaaki Kakitsuka; Shinji Matsuo (IEICE Trans. Electron., 2017)

Sub-fF-Capacitance Photonic-Crystal Photodetector Towards fJ/bit On-Chip Receiver. - Kengo Nozaki; Shinji Matsuo; Koji Takeda; Takuro Fujii; Masaaki Ono; Abdul Shakoor; Eiichi Kuramochi; Masaya Notomi (IEICE Trans. Electron., 2017)

Energy-Efficient 400G SDM Transmitter Based on DMT and a 1.3-sµm Membrane DML-Array-on-Si. - Nikolaos-Panteleimon Diamantopoulos; Kota Shikama; Hidetaka Nishi; Takuro Fujii; Toshiki Kishi; Koji Takeda; Yoshiteru Abe; Takashi Matsui; Takaaki Kakitsuka; Hiroshi Fukuda; Kazuhide Nakajima; Shinji Matsuo (ECOC, 2018)

Heterogeneously Integrated Mach-Zehnder Modulator Using Membrane InGaAsP Phase Shifter and Hydrogen-Free SiN Waveguide on Si Platform. - Tatsurou Hiraki; Takuma Aihara; Takuro Fujii; Koji Takeda; Tai Tsuchizawa; Takaaki Kakitsuka; Hiroshi Fukuda; Shinji Matsuo (ECOC, 2018)

1-fJ/bit Direct Modulation of Photonic-Crystal Lasers. - Koji Takeda; Takuro Fujii; Akihiko Shinya; Masaya Notomi; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2018)

Lateral Current Injection Membrane Buried Heterostructure Lasers Integrated on 200-nm-thick Si Waveguide. - Takuma Aihara; Tatsurou Hiraki; Koji Takeda; Koichi Hasebe; Takuro Fujii; Tai Tsuchizawa; Takaaki Kakitsuka; Shinji Matsuo (OFC, 2018)

Energy-Efficient 120-Gbps DMT Transmission Using a 1.3-μm Membrane Laser on Si. - Nikolaos-Panteleimon Pandelis Diamantopoulos; Takuro Fujii; Hidetaka Nishi; Koji Takeda; Takaaki Kakitsuka; Shinji Matsuo (OFC, 2018)

Heterogeneously Integrated III-V Lasers Fabricated Using Epitaxial Growth on an InP/SiO2/Si Substrate. - Takuro Fujii; Koji Takeda; Hidetaka Nishi; Shinji Matsuo (OFC, 2018)

A 137-mW, 4 ch × 25-Gbps Low-Power Compact Transmitter Flip-Chip-Bonded 1.3-μm LD-Array-on-Si. - Toshiki Kishi; Munehiko Nagatani; Shigeru Kanazawa; Shinsuke Nakano; Hiroaki Katsurai; Takuro Fujii; Hidetaka Nishi; Takaaki Kakitsuka; Koichi Hasebe; Kota Shikama; Yuko Kawajiri; Atsushi Aratake; et al. (OFC, 2018)

Monolithic Integration of an 8-channel Directly Modulated Membrane-laser Array and a SiN AWG Filter on Si. - Hidetaka Nishi; Takuro Fujii; Nikolaos-Panteleimon Diamantopoulos; Koji Takeda; Erina Kanno; Takaaki Kakitsuka; Tai Tsuchizawa; Hiroshi Fukuda; Shinji Matsuo (OFC, 2018)

Ultra-High Bandwidth InP IQ Modulator co-assembled with Driver IC for Beyond 100-GBd CDM. - Yoshihiro Ogiso; Hitoshi Wakita; Munehiko Nagatani; Hiroshi Yamazaki; Masanori Nakamura; Takayuki Kobayashi; Johsuke Ozaki; Yuta Ueda; S. Nakano; Shigeru Kanazawa; Takuro Fujii; Yasuaki Hashizume; et al. (OFC, 2018)

Multicore-Fiber LC Receptacle with Compact Fan-in/Fan-out for Short-Reach Transceivers. - Kota Shikama; Yoshiteru Abe; Toshiki Kishi; Koji Takeda; Takuro Fujii; Hidetaka Nishi; Takashi Matsui; Atsushi Aratake; Kazuhide Nakajima; Shinji Matsuo (OFC, 2018)

Energy-Efficient 100-Gbps PAM Transmissions Using a 1.3-µm Membrane DML-on-Silicon. - Nikolaos-Panteleimon Diamantopoulos; Takuro Fujii; Hidetaka Nishi; Koji Takeda; Takaaki Kakitsuka; Shinji Matsuo (PSC, 2018)

56-Gbit/s Operations of Mach-Zehnder Modulators using 300-μm-Long Membrane InGaAsP Phase Shifters and SiN waveguides on Si. - Takuma Aihara; Tatsurou Hiraki; Takuro Fujii; Koji Takeda; Tai Tsuchizawa; Takaaki Kakitsuka; Hiroshi Fukuda; Shinji Matsuo (OFC, 2019)

A 25-Gbps × 4 ch, Low-Power Compact Wire-Bond-Free 3D-Stacked Transmitter Module with 1.3-μm LD-Array-on-Si for On-Board Optics. - Toshiki Kishi; Hitoshi Wakita; Kota Shikama; Munehiko Nagatani; Shigeru Kanazawa; Takuro Fujii; Hidetaka Nishi; Hiroshi Ishikawa; Yuko Kawajiri; Atsushi Aratake; Hideyuki Nosaka; Hiroshi Fukuda; et al. (OFC, 2019)

Ultra-High Bandwidth InP IQ Modulator for Beyond 100-GBd Transmission. - Yoshihiro Ogiso; Josuke Ozaki; Yuta Ueda; Hitoshi Wakita; Munehiko Nagatani; Hiroshi Yamazaki; Masanori Nakamura; Takayuki Kobayashi; Shigeru Kanazawa; Takuro Fujii; Yasuaki Hashizume; Hiromasa Tanobe; et al. (OFC, 2019)

ANN Equalizer for Performance Improvement of PAM-M Signals Using $1.3- mu mathrm{m}$ Membrane DML-on-Silicon. - Nikolaos-Panteleimon Diamantopoulos; Takuro Fujii; Hidetaka Nishi; Koji Takeda; Takaaki Kakitsuka; Shinji Matsuo (OECC/PSC, 2019)

Heterogeneously Integrated Membrane DFB Laser and Si Mach-Zehnder Modulator on Si Photonics Platform. - Takuma Aihara; Tatsurou Hiraki; Takuro Fujii; Koji Takeda; Tai Tsuchizawa; Takaaki Kakitsuka; Hiroshi Fukuda; Shinji Matsuo (ECOC, 2020)

Net 113-Gbps PAM-4 Transmission Using Membrane DML-on-Si with 0.34 pJ/bit at 50 °C. - Nikolaos-Panteleimon Diamantopoulos; Suguru Yamaoka; Takuro Fujii; Hidetaka Nishi; Koji Takeda; Tai Tsuchizawa; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2020)

50-GHz-bandwidth Electro-absorption Modulator with Membrane InGaAsP Lateral p-i-n Diode on Si Platform. - Tatsurou Hiraki; Takuma Aihara; Yoshiho Maeda; Takuro Fujii; Tai Tsuchizawa; Kiyoto Takahata; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2020)

Mach-Zehnder Modulator using Membrane InGaAsP Phase Shifters and SOAs inside Interferometer Arms on Si Photonics Platform. - Takuma Aihara; Tatsurou Hiraki; Takuro Fujii; Koji Takeda; Takaaki Kakitsuka; Tai Tsuchizawa; Shinji Matsuo (OFC, 2020)

4×56-GBaud PAM-4 SDM Transmission over 5.9-km 125-µm-Cladding MCF using III-V-on-Si DMLs. - Nikolaos-Panteleimon Pandelis Diamantopoulos; Hidetaka Nishi; Takuro Fujii; Kota Shikama; Takashi Matsui; Koji Takeda; Takaaki Kakitsuka; Kazuhide Nakajima; Shinji Matsuo (OFC, 2020)

Net 321.24-Gb/s IMDD Transmission Based on a >100-GHz Bandwidth Directly-Modulated Laser. - Nikolaos-Panteleimon Diamantopoulos; Hiroshi Yamazaki; Suguru Yamaoka; Munehiko Nagatani; Hidetaka Nishi; Hiromasa Tanobe; Ryo Nakao; Takuro Fujii; Koji Takeda; Takaaki Kakitsuka; Hitoshi Wakita; Minoru Ida; et al. (OFC, 2020)

A 0.57-mW/Gbps, 2ch × 53-Gbps Low-Power PAM4 Transmitter Front-End Flip-Chip-Bonded 1.3-µm LD-Array-on-Si. - Toshiki Kishi; Munehiko Nagatani; Shigeru Kanazawa; Kota Shikama; Takuro Fujii; Hidetaka Nishi; Hiroshi Yamazaki; Norio Sato; Hideyuki Nosaka; Shinji Matsuo (OFC, 2020)

Si-waveguide-coupled Membrane InGaAsP-multiple-quantum-well Photodetector with Large Bandwidth at High Optical Input Power. - Yoshiho Maeda; Tatsurou Hiraki; Takuma Aihara; Takuro Fujii; Koji Takeda; Tai Tsuchizawa; Shinji Matsuo (OFC, 2020)

Femto-Farad Nanophotonic Devices for fJ/Bit Signal Conversion. - Kengo Nozaki; Shinji Matsuo; Takuro Fujii; Koji Takeda; Eiichi Kuramochi; Akihiko Shinya; Masaya Notomi (OFC, 2020)

2-channel 112-Gbps NRZ Short-Reach Transmission Based on 60-GHz-Bandwidth Directly-Modulated Membrane Laser Array on Si. - Nikolaos-Panteleimon Diamantopoulos; Takuro Fujii; Suguru Yamaoka; Hidetaka Nishi; Koji Takeda; Tai Tsuchizawa; Toru Segawa; Takaaki Kakitsuka; Shinji Matsuo (ECOC, 2021)

8-ch, 160-nm-Wavelength-Range Membrane Laser Array Using Selective Epitaxy on InP-on-Insulator Substrate. - Takuro Fujii; Tomonari Sato; Nikolaos-Panteleimon Diamantopoulos; Koji Takeda; Hidetaka Nishi; Takuma Tsurugaya; Tai Tsuchizawa; Shinji Matsuo (OFC, 2021)

Over-67-GHz-bandwidth Membrane InGaAlAs EADFB Laser on Si Platform. - Tatsurou Hiraki; Takuma Aihara; Yoshiho Maeda; Takuro Fujii; Tomonari Sato; Tai Tsuchizawa; Shinji Matsuo; Kiyoto Takahata; Takaaki Kakitsuka (OFC, 2022)

How do different tokenizers perform on downstream tasks in scriptio continua languages?: A case study in Japanese. - Takuro Fujii; Koki Shibata; Atsuki Yamaguchi; Terufumi Morishita; Yasuhiro Sogawa (ACL (student), 2023)

BiLMa: Bidirectional Local-Matching for Text-based Person Re-identification. - Takuro Fujii; Shuhei Tarashima (ICCV (Workshops), 2023)

Uncooled Operation of Si Mach-Zehnder Modulator Integrated with Membrane Semiconductor Optical Amplifiers inside Interferometer Arms. - Takuma Aihara; Tatsurou Hiraki; Takuro Fujii; Koji Takeda; Hiroshi Fukuda; Takaaki Kakitsuka; Tai Tsuchizawa; Shinji Matsuo (OFC, 2023)

30-Gbps/ch x 4 ch Simultaneous Error-Free Transmission with A Low-Power Transmitter Flip-Chip-Bonded 1.3-μm LD-Array-on-Si. - Toshiki Kishi; Munehiko Nagatani; Shigeru Kanazawa; Kota Shikama; Takuro Fujii; Hidetaka Nishi; Tadashi Minotani; Norio Sato; Toru Segawa; Shinji Matsuo (OFC, 2023)

Uncooled Operation of Directly Modulated Membrane Laser with Buried Sapphire Layer on Si Substrate. - Tatsurou Hiraki; Yoshiho Maeda; Takuro Fujii; Koji Takeda; Takuma Aihara; Toru Segawa; Yasutomo Ota; Satoshi Iwamoto; Yasuhiko Arakawa; Shinji Matsuo (OFC, 2024)

Process-tolerant III-V/Si Membrane Distributed Reflector Lasers and 50-Gb/s Direct Modulation at 80°C. - Koji Takeda; Takuro Fujii; Yoshiho Maeda; Toru Segawa; Shinji Matsuo (OFC, 2024)

Automated Sperm Assessment Framework and Neural Network Specialized for Sperm Video Recognition. - Takuro Fujii; Hayato Nakagawa; Teppei Takeshima; Yasushi Yumura; Tomoki Hamagami (WACV, 2024)

Estimation of Multi-Expert Sperm Assessments Using Video Recognition Based Model Trained by EMD Loss. - Hayato Nakagawa; Takuro Fujii; Yasushi Yumura; Tomoki Hamagami (IEEE Access, 2024)

JAPAGEN: Efficient Few/Zero-shot Learning via Japanese Training Dataset Generation with LLM. - Takuro Fujii; Satoru Katsumata (CoRR, 2024)

Integrated Optical Link on Si Wafer Using Low Energy Membrane InP-based Photonic Devices. - Tatsurou Hiraki; Koji Takeda; Takuro Fujii; Takuma Aihara; Yoshiho Maeda; Hiroki Sugiyama; Tomonari Sato; Shinji Matsuo (OFC, 2025)

42-Gbps/ch x 4 ch Simultaneous Error-Free Operation with Low-Power Transmitter Flip-Chip-Bonded 1.3-μm LD-Array-on-Si. - Toshiki Kishi; Munehiko Nagatani; Shigeru Kanazawa; Takuro Fujii; Hidetaka Nishi; Tadashi Minotani; Norio Sato; Tomonari Sato; Shinji Matsuo (OFC, 2025)

Micro-transfer Printed Membrane Laser and Electroabsorption Modulator on Si waveguide Integrated with Polymer Spot-size Converter. - Yoshiho Maeda; Tatsurou Hiraki; Takuma Aihara; Hiroya Homma; Takuro Fujii; Koji Takeda; Tomonari Sato; Yasutomo Ota; Satoshi Iwamoto; Yasuhiko Arakawa; Shinji Matsuo (OFC, 2025)

High-Speed and High-Temperature-Operation III-V on Si Membrane DFB Lasers. - Koji Takeda; Takuro Fujii; Suguru Yamaoka; Tatsurou Hiraki; Yoshiho Maeda; Shinji Matsuo (OFC, 2025)

A Japanese Language Model and Three New Evaluation Benchmarks for Pharmaceutical NLP. - Issey Sukeda; Takuro Fujii; Kosei Buma; Shunsuke Sasaki; Shinnosuke Ono (CoRR, 2025)