高稳定单纵模的1.55μm DFB激光器  

Highly Stable Single Longitudinal Mode Operation 1.55μm DFB Lasers

作　　者：董志江[1] 杨新民[1] 周宁[1] 马磐[1] 刘坚[1] 杨桂生 

机构地区：[1]武汉邮电科学研究院电信器件公司,武汉430074

出　　处：《Journal of Semiconductors》1992年第2期127-131,共5页半导体学报（英文版）

摘　　要：采用一级全息光栅和二步液相外延法研制出高稳定单纵模工作的1.55μm分布反馈(DFB)激光器.20℃时连续工作阈值电流I_(th)为40mA,单纵模光功率为7.5mW.在70℃高温和 1GHz正弦信号调制下保持边模抑制比(SMSR)大于 30dB的单纵模工作,最高SMSR大于38dB.线宽△v为30MHz.单纵模产率Y_(SLM)48％.70℃环境下通电100mA连续24小时老化后,阈值电流变化率△I_(th)/I_(th)(20℃)≤10％,SMSR未劣化.该DFB激光器首次在国内实用化五次群光纤通信系统(传输码635Mb/s、RZ)上实现70.7km普通光纤无中继传输.Highly stable single longitudinal mode (SLM) operation 1.55μm distributed feedback(DFB) lasers have been developed by means of the two-step liquid phase epitaxy (LPE) andfirst-order grating.The CW threshold current is typically about 40mA (20℃), and the lightoutput power for stable CW SLM operation is 7.5mW. SLM operation with a side-mode-sup-pressionratio (SMSR) of 30dB from 20℃ to 70℃ and under 1GHz sinewave modulation canbe sustained.The maximum SMSR is 38dB.Spectral linewidth is 30MHz. SLM yield is 48%.After a 70℃-100mA-24hrs prescreened, the rate of increase in threshold current is less than10%, no degradation of spectra is observed.A 635Mbit/s(RZ) error-free transmission is ac-complished over a 70.7km fiber length by the DFB laser for the first time in China.

关 键 词：光纤通信 DFB 激光器 液相外延法 

分 类 号：TN248[电子电信—物理电子学]