用于光纤拉曼放大器抽运源的单级光纤拉曼激光器

Single-Stage Fiber Raman Lasers for Pupming Fiber Raman Amplifiers

抽运光源是光纤拉曼放大器应用于密集波分复用系统的关键技术,设计了一种紧凑型的808 nm激光二极管抽运的基于钒酸钇(Nd3+∶YVO4)晶体1342 nm固体激光器模块,提出利用上述1342 nm固体激光器抽运基于光纤光栅的单级全光纤型拉曼谐振器获得1.4μm激光输出的光纤拉曼激光器,分析了固体激光器的阈值特性、性能优化方法和单级光纤拉曼谐振器的设计方法。上述1342 nm固体激光器模块在抽运功率2 W时获得了最大655 mW的激光输出功率和42.6%的斜率效率,单级拉曼谐振器的1342 nm到1.4μm光功率转换斜率效率达75%,在1425 nm1、438 nm1、455 nm和1490 nm处的输出功率达到300 mW以上。最后给出基于1.4μm光纤拉曼激光器抽运的宽带平坦放大的光纤拉曼放大器的结构参量和性能测试结果。

The pumping source is the key technology of fiber Raman amplifiers applied in dense wavelength division multiplexing systems. A compact 1342 nm Nd^3＋ ：YVO4 diode-pumped solid state laser（DPSSL） module pumped by 808 nm laser diodes is developed. A single-stage 1.4 μm fiber Raman laser is constructed by pumping a single-stage fiber Raman resonator based on fiber Bragg gratings with such 1342 nm diode-pumped solid-state laser module. The threshold property, the optimized setup of the diode-pumped solid-state laser module and the design scheme of the single-stage fiber Raman resonator are analyzed respectively. The diode-pumped solid-state laser module is presented with the total laser power of 655 mW and the slope efficiency of 42.6% pumped by a 2 W 808 nm laser diode. The light power conversion slope efficiency of the single-stage fiber Raman resonator achieves 75% and the total laser power at 1425 nm, 1438 nm, 1455 nm and 1490 nm achieves 300 mW each. Finally, a broadband, flat-gain distributed fiber Raman amplifier pumped by such lasers is Dresented.