摘要
采用质子轰击的PBR 结构,研制了室温阈电流小于15mA,高稳定单纵模输出的1.5μmDFB激光器.为今后研制长寿命无致冷1.5μmDFB激光器组合件奠定了基础,在大温度范围(-40-+60℃)和大工作电流范围(1.2-3I_(th)内可稳定单纵模工作,边模抑制比(SMSR)可达30dB以上.静态线宽一般为30-40MHz,最窄可低于20MHz.器件经50℃恒功加速老化实验,外推20℃连续工作时间已超过3000小时无显著退化迹象.本器件已首次在国内做为信号源成功地用在140Mb/S相干光通信系统上.
Low threshold current of less than 15mA at room temperature and high stable singlelongitudinal mode 1.5μm DFB lasers were prepared by using proton bombarded PBR structure.It will be a key to developing long life time 1.5μm DFB module without cooler. The stablesingle longitudinal mode operation can be kept in large temperature range (-40-+60℃)and large driving current range (1.2I_(th) to 3I_(th)). The side mode suppression ratio (SMSR)is more than 30 dB. The typical linewidth of the PBR-DFB lasers is about 30--40 MHz andthe narrow one is less than 20 MHz. The 3000 hours CW operation at room temperature wasextraporated by using accelerated test at 50℃ with APC. Without any serious degradation.The PBR--DFB lasers have been used as a signal source of 140 Mbit's coherent communi-cation system for the first time in China.
关键词
平面掩埋脊型
激光器
低阈值
Lasers, Semiconductor
Design
Optical Communication Equipment
