Abstract

We previously developed a semiconductor optical amplifier (SOA) assisted extended reach electroabsorption modulator integrated distributed feedback (EADFB) laser (AXEL) to increase the optical modulation output power and a high-frequency integrated design based on the flip-chip interconnection technique (Hi-FIT) to obtain a high modulation bandwidth. We achieved a high-output power 224-Gbit/s 4-level pulse-amplitude-modulation (4-PAM) operation of a Hi-FIT AXEL module. In this paper, we developed a compact DC block circuit integrated into Hi-FIT AXEL module to decrease chip-power consumption without increasing the sub-assembly size and degrading the modulation bandwidth. We designed a Hi-FIT AXEL sub-assembly, that include a flip-chip interconnection board with a DC block circuit that affects the modulation bandwidth. We achieved a 3-dB bandwidth of up to 64 GHz for this designed sub-assembly. The fabricated Hi-FIT AXEL module has a 3-dB bandwidth of more than 62 GHz and a flat frequency response up to 50 GHz. For the 224-Gbit/s 4-PAM operation, the fabricated Hi-FIT AXEL module has a chip-out average output power of +10.0 dBm with a transmitter eye-closure quaternary (TECQ) of 1.9 dB. The integrated compact DC block circuit can reduce chip power consumption by up to 17%.

224-Gbit/s 4-PAM operation of a high-modulation-bandwidth high-output-power Hi-FIT AXEL transmitter

Shigeru Kanazawa, Takahiko Shindo, Mingchen Chen, Yasuhiko Nakanishi, Hirotaka Nakamura, and Hideaki Matsuzaki
Opt. Lett. 47(12) 3019-3022 (2022)

Ultracompact, 160-Gbit/s transmitter optical subassembly based on 40-Gbit/s × 4 monolithically integrated light source

Takeshi Fujisawa, Toshio Itoh, Shigeru Kanazawa, Kiyoto Takahata, Yuta Ueda, Ryuzo Iga, Hiroaki Sanjo, Takayuki Yamanaka, Masaki Kotoku, and Hiroyuki Ishii
Opt. Express 21(1) 182-189 (2013)

Novel approach for chirp and output power compensation applied to a 40-Gbit/s EADFB laser integrated with a short SOA

Wataru Kobayashi, Masakazu Arai, Takeshi Fujisawa, Tomonari Sato, Toshio Ito, Koichi Hasebe, Shigeru Kanazawa, Yuta Ueda, Takayuki Yamanaka, and Hiroaki Sanjoh
Opt. Express 23(7) 9533-9542 (2015)

Experimental demonstration of a 160 Gbit/s 3D-integrated silicon photonics receiver with 1.2-pJ/bit power consumption

Dingyi Wu, Dong Wang, Daigao Chen, Jie Yan, Ziyue Dang, Jianchao Feng, Shiping Chen, Peng Feng, Hongguang Zhang, Yanfeng Fu, Lei Wang, Xiao Hu, Xi Xiao, and Shaohua Yu
Opt. Express 31(3) 4129-4139 (2023)

High-power SOA-integrated EADFB laser for long-reach passive optical network systems

Mingchen Chen, Takahiko Shindo, Shigeru Kanazawa, Yasuhiko Nakanishi, Atsushi Kanda, Toshihide Yoshimatsu, and Kimikazu Sano
OSA Continuum 4(2) 498-506 (2021)