Spectrally Efficient Frequency-Domain Optical CDM Employing QAM Based on Electrical Spatial Code Spreading. - Shin Kaneko; Sang-Yuep Kim; Noriki Miki; Hideaki Kimura 002; Hisaya Hadama; Koichi Takiguchi; Hiroshi Yamazaki; Takashi Yamada; Yoshiyuki Doi (IEICE Trans. Commun., 2011)

Modulation Format Conversion of OOK to PAM Signals Using Balanced Detection and Intensity Modulation. - Koichi Takiguchi (IEICE Trans. Electron., 2016)

Demultiplexing Method of Variable Capacity Optical OFDM Signal Using Time Lens-Based Optical Fourier Transform. - Koichi Takiguchi; Takaaki Nakagawa; Takaaki Miwa (IEICE Trans. Electron., 2018)

Integrated-Photonic Tunable Demultiplexer for Variable Channel Number Optical OFDM Signals. - Koichi Takiguchi; Hideaki Masaki; Taiki Taguchi (OFC, 2019)

Flexible Data Rate THz-Wave Communication using Nyquist Pulses and Optical-Domain Reception Signal Processing. - Koichi Takiguchi; Nozomu Nishio (OFC, 2020)

Integrated-optic gate-free tunable filter for demultiplexing various channel symbol rate OFDM signals. - Koichi Takiguchi; Hideaki Masaki (OFC, 2021)

Integrated-optic Signal Cipher Circuit Using Two-dimensional Code. - Koichi Takiguchi; Hideaki Masaki (OECC/PSC, 2022)

Fully Passive Integrated-optic Chromatic Dispersion Compensator and its Use to PAM4 Signal Compensation. - Koichi Takiguchi (OFC, 2023)

Flexible capacity wireless communication in THz-band with Michelson interferometer-based THz-wave filter. - Koichi Takiguchi (OFC, 2024)

Mode group division multiplexing communication with the use of graded-index plastic optical fiber. - Yuichiro Takimoto; Koichi Takiguchi (IEICE Electron. Express, 2024)