TDM-PON 上行信号光功率均衡器的锁模特性

摘要

为了减小时分复用无源光网络（TDM-PON）上行信号光波长的飘移，基于 TDM-PON 上行信号光功率均衡器架构，采用单模激光注入锁定光网络单元（ONU）法布里-珀罗（F-P）激光器（LD）方法，研究了 F-P LD 输出光波长的锁模特性，包括锁模的范围、驱动电流对锁模特性的影响、锁模前后温度变化引起 F-P LD 光波长变化情况等。结果表明，当驱动电流为9mA 时，F-P LD 可被锁模的波长范围为0．38nm，大于 ONU 上行光波长因环境温度变化5℃而产生的波长位移量0．25nm，F-P LD 被锁模可使 ONU 上行信号的光波长相同且稳定，降低光功率均衡后的噪声。%In order to reduce the wavelength drift of the time division multiplexing passive optical network (TDM-PON)upstream traffic,based on a architecture with optical power equalization of the upstream traffic in a TDM-PON,using single mode laser injection locking Fabry-Perot laser diode (F-P LD)of optical network unit (ONU),the mode-locking characteristics of Fabry-Perot output laser wavelength was discussed,such as the range of injection-locking,the influence of driving current on mode-locking characteristics,the influence of temperature variation on the wavelength with or without injection-locking.The results show that,for such a laser,when the driving current is 9mA,the injection-locking wavelength range is 0.38nm which is larger than the 0.25nm upstream wavelength drift of the ONU caused by the 5℃change of environmental temperature.The identical and stable wavelength of the ONU upstream traffic and the low noise after the optical power equalization were achieved by the injection-locking F-P LD.