106-Gb/s PAM4 Operation of Directly Modulated DFB Lasers from 25 to 70 °C for Transmission Over 2-km SMF in the CWDM Range

被引：8
|
作者：
Nakajima, Takayuki [1 ]
Onga, Masaru [1 ]
Sekino, Yuji [1 ]
Nakanishi, Akira [1 ]
Sasada, Noriko [1 ]
Hayakawa, Shigenori [1 ]
Hamada, Shigetaka [1 ]
Naoe, Kazuhiko [1 ]
机构：
[1] Lumentum Japan Inc, Sagamihara, Kanagawa 2525250, Japan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2022年 / 40卷 / 06期
关键词：
Optical fiber dispersion; Modulation; Fiber lasers; Semiconductor lasers; Semiconductor device measurement; Transceivers; Optical modulation; Asymmetric corrugation pitch modulated grating structure; bit-error rate; direct modulation; dispersion penalty; distributed feedback laser; fiber transmission; PAM4; operation; relaxation oscillation frequency; transmitter and dispersion eye closure quaternary; wide temperature range;
D O I：
10.1109/JLT.2021.3119761
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Four newly developed directly modulated DFB lasers operating in the 1.3-mu m CWDM wavelength range demonstrated 106-Gb/s PAM4 operation for transmission over 2-km SMF at temperatures of 25, 50 and 70 degrees C. Eye diagrams of the DMLs were clearly opened after 500-m and 2-km SMF transmission, even at 70 degrees C, and their TDECQ values were equal or lower than 3.4 dB in BTB configuration up to 50 degrees C. The results of dispersion penalties in the CWDM range were less than +0.8 dB from 25 to 70 degrees C. These results indicate that the four developed DMLs can realize a cost-effective transceiver with low power consumption for 400GbE and beyond.
引用
收藏
页码：1815 / 1820
页数：6
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