Wide-waveguide high-power low-RIN single-mode distributed feedback laser diodes for optical communication
Wide-waveguide high-power low-RIN single-mode distributed feedback laser diodes for optical communication
复制标题
用于光通信的宽波导高功率低 RIN 单模分布式反馈激光二极管
DOI：
10.1364/oe.464598
复制
发表时间：
2022
期刊：
影响因子：
3.8
通讯作者：
Weihua Guo
中科院分区：
文献类型：
--
作者：
Minwen Xiang;Yuanhao Zhang;guojiong Li;Can Liu;Quanan Chen;Qiaoyin Lu;Lirong Huang;Mingzhi Lu;John Donegan;Weihua Guo
本文介绍了一种采用双波导结构的8 μ m宽800 μ m长的高功率、单模、低RIN DFB激光器。引入的无源下波导削弱了脊波导的横向光限制，从而减少了p掺杂层引起的损耗，保持了激光器的单模稳定性。该激光器输出功率大于170 mW，相对强度噪声（RIN）沿着低于-157 dB/Hz，边模抑制比（SMSR）大于55 dB。温度调谐范围为−10°C至60°C，可实现8.6 nm波长调谐，变化系数为0.12 nm/K。在100 mW输出功率下，激光器的弛豫振荡频率约为8 GHz，线宽约为250 kHz。高功率激光器的特点，包括高斜率效率，单模稳定性和低噪声，使它成为一个合适的候选人，光通信。
We present an 8-µm-wide 800-µm-long high-power, single-mode and low RIN DFB laser using a dual-waveguide structure. The introduced passive lower waveguide has weakenes the lateral optical confinement for the ridge waveguide, and thus reduces losses caused by the p-doped layers and maintains single mode stability of the laser. The fabricated laser exhibited an output power higher than 170 mW and a relative intensity noise (RIN) below −157 dB/Hz along with a side-mode suppression-ratio (SMSR) over 55 dB. The temperature tuning from −10°C to 60°C allows an 8.6 nm wavelength tunability with a variation coefficient of 0.12 nm/K. The relaxation oscillation frequency is around 8 GHz, and the linewidth is about 250 kHz at 100 mW output power for the fabricated laser. The characteristics of the proposed high-power laser, including high slope efficiency, single mode stability and low noise, make it a suitable candidate for optical communication.