单纵模波长可开关的环形腔光纤激光器  

Single-Longitudinal-Mode and Wavelength-Switchable Fiber Laser with Ring Cavity

作　　者：俞力[1] 宋跃江[1] 张旭苹[1] 

机构地区：[1]南京大学光通信工程研究中心,江苏南京210093

出　　处：《中国激光》2009年第7期1890-1893,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(60644001)资助项目

摘　　要：提出并实现了一种单纵模窄线宽输出、波长可开关的光纤激光器。该激光器采用环形腔结构,利用一段未抽运的掺铒光纤(EDF)的饱和吸收效应来实现光纤激光器的单纵模运转与窄线宽输出;同时利用1×2光开关和2个并联的不同中心波长的光纤光栅(FBG)的选波作用,通过控制光开关的电压信号,实现2个输出波长的可开关功能。在17.5 dBm的掺铒光纤放大器(EDFA)输出功率下,获得了2.5 dBm峰值功率,3 kHz线宽的单纵模激光输出;并且输出光的波长在控制电压的作用下可在1545.2 nm和1556.4 nm两个波长之间任意选择。A new kind of single-longitudinal-mode and wavelength-switchable fiber laser is proposed and experimentally demonstrated. Such a fiber laser has a ring resonant cavity. An unpumped erbium-doped fiber （EDF） in the cavity is used as the saturable absorber to achieve single-longitudinal-mode operation. An 1 × 2 optical switch and 2 parallel fiber Bragg gratings （FBGs） are used as the wavelength selection module to achieve wavelengthswitchable operation. At 17.5-dBm output power of EDF amplifer, the single-longitudinal-mode laser with 2.5-dBm power and 3-kHz linewidth is generated. The wavelength is randomly switched between 1545.2 nm and 1556.4 nm by applying the suitable electrical signal to optical switch.

关 键 词：激光器 光纤激光器 单纵模 光开关 饱和吸收体 

分 类 号：TN248.1[电子电信—物理电子学]