发光学报, 2012, 33 (10): 1138, 网络出版: 2012-10-12
基于双透镜外腔结构的窄线宽可调谐半导体激光器
Narrow-linewidth Tunable Semiconductor Lasers Based on Dual-lens External-cavity Structure
外腔激光器 F-P滤波器 窄线宽 相干光通讯 external-cavity laser Fabry-Pérot filter narrow linewidth coherent optical communications
摘要
设计了一种具有独特双透镜外腔结构的可调谐窄线宽激光器, 利用一个温控50 GHz的标准具提供ITU标准波长序列, 通过一个压电陶瓷驱动的Fabry-Pérot可调谐滤波器选择一个标准波长实现单波长输出。实验结果表明:该激光器的调谐范围达到了1 525~1 580 nm, 覆盖整个C波段, 线宽为37.5 kHz, 400 mA电流条件下的输出功率超过50 mW, 边模抑制比超过50 dB, 达到或超过相干通讯应用的要求和其他单片集成类器件的指标。另外, 本结构具有位置容差大、调谐速度快(<3 ms)、易于实现超窄线宽以及波长微调等优点, 待实现小型化和标准封装, 其大规模应用将成为可能。
Abstract
A narrow-linewidth tunable laser based on a unique dual-lens external-cavity structure was reported, in which a thermally-tuned 50 GHz etalon was utilized to provide standard ITU-grid wavelengths and a PZT-actuated tunable Fabry-Pérot filter to select wavelength. In experiment, the laser wavelength could be tuned from 1 525 to 1 580 nm, covering the whole C band. And it measured a linewidth of 37.5 kHz, an output power >50 mW at the 400 mA pump current, a SMSR > 50 dB and a tuning speed <3 ms. The performance is superior to the requirements of coherent communication applications and the reported planar waveguide-based counterparts. Moreover, the dual-lens structure bears other merits such as high positioning tolerance and potential for ultra-narrow linewidth. It may have a wide application after miniaturization and standard packaging.
冯志庆, 白兰, 王宁, 高磊, 陈波, 张需明. 基于双透镜外腔结构的窄线宽可调谐半导体激光器[J]. 发光学报, 2012, 33(10): 1138. FENG Zhi-qing, BAI Lan, WANG Ning, GAO Lei, CHEN Bo, ZHANG Xu-ming. Narrow-linewidth Tunable Semiconductor Lasers Based on Dual-lens External-cavity Structure[J]. Chinese Journal of Luminescence, 2012, 33(10): 1138.