Abstract

Four newly developed directly modulated DFB lasers operating in the 1.3-μm CWDM wavelength range demonstrated 106-Gb/s PAM4 operation for transmission over 2-km SMF at temperatures of 25, 50 and 70 °C. Eye diagrams of the DMLs were clearly opened after 500-m and 2-km SMF transmission, even at 70 °C, and their TDECQ values were equal or lower than 3.4 dB in BTB configuration up to 50 °C. The results of dispersion penalties in the CWDM range were less than +0.8 dB from 25 to 70 °C. These results indicate that the four developed DMLs can realize a cost-effective transceiver with low power consumption for 400GbE and beyond.

2 × 64 Gb/s PAM-4 transmission over 70 km SSMF using O-band 18G-class directly modulated lasers (DMLs)

Fan Gao, Shiwei Zhou, Xiang Li, Songnian Fu, Lei Deng, Ming Tang, Deming Liu, and Qi Yang
Opt. Express 25(7) 7230-7237 (2017)

Low-cost hybrid integrated 4 × 25.78  Gb/s CWDM TOSA for 10  km transmission using DFB-LDs and an arrayed waveguide grating multiplexer

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Photon. Res. 6(11) 1067-1073 (2018)

Low-crosstalk operation of directly modulated DFB laser array TOSA for 112-Gbit/s application

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Opt. Express 24(12) 13555-13562 (2016)

Amplifier-free 4×96 Gb/s PAM8 transmission enabled by modified Volterra equalizer for short-reach applications using directly modulated lasers

Di Li, Lei Deng, Yao Ye, Yucheng Zhang, Haiping Song, Mengfan Cheng, Songnian Fu, Ming Tang, and Deming Liu
Opt. Express 27(13) 17927-17939 (2019)

30 Gbit/s PAM4 transmission using an 8-GHz directly modulated multi-section laser

Marcos Troncoso Costas, Ahmed Galib Reza, Hima Putta, Ankit Sharma, Gaurav Jain, Mark Smyth, Frank Smyth, John MacDougall, Colm Browning, Francisco Diaz Otero, and Liam Barry
Opt. Express 30(12) 20194-20202 (2022)