Abstract

We extend the transmission distance for 28-Gb/s optical links from 40 to 80 km in a single-mode fiber (SMF) in the 1.3-μm-wavelength window by using an intensity-modulation direct-detection scheme. To extend the link budget, and compensate for the optical loss of SMF, we try to increase the optical output power of an electroabsorption modulator integrated with distributed feedback (EADFB) laser. We apply a semiconductor optical amplifier (SOA)-assisted extended-reach EADFB laser (AXEL) to a 1.3-μm-wavelength light source. To increase the optical output power while using energy efficiently, we design the SOA length in terms of achieving a balance between the laser diode (LD) and the SOA length with a constant injection current of 160 mA. We fabricate an AXEL and an EADFB laser and compare their basic characteristics. By using the high-power AXEL, we achieve the first 28-Gb/s 80-km SMF transmission without the need for digital signal processing or an in-line optical amplifier. The AXEL consumes only 0.26 W and does not require any digital processing or an in-line amplifier and can, therefore, reduce the power needed for an optical network system by tens of watts.

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)

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)

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)

1.3-μm, 4 × 25-Gbit/s, EADFB laser array module with large-output-power and low-driving-voltage for energy-efficient 100GbE transmitter

Takeshi Fujisawa, Shigeru Kanazawa, Kiyoto Takahata, Wataru Kobayashi, Takashi Tadokoro, Hiroyuki Ishii, and Fumiyoshi Kano
Opt. Express 20(1) 614-620 (2012)

Bi-directional transmission of 8×10Gb/s DPSK signals over 80km of SMF-28 fiber using in-line semiconductor optical amplifier

Jianjun Yu, Yong-Kee Yeo, Oladeji Akanbi, and Gee-Kung Chang
Opt. Express 12(25) 6215-6218 (2004)