Institute of Automation and Electrometry, SB RAS, Novosibirsk 630090, Russia.
Opt Lett. 2013 Sep 1;38(17):3301-3. doi: 10.1364/OL.38.003301.
A random lasing based on Rayleigh scattering (RS) in a passive fiber directly pumped by a high-power laser diode (LD) has been demonstrated. Owing to the RS-based random distributed feedback (RDFB) the low-quality LD beam (938 nm) is converted into the high-quality laser output (980 nm). Because of the relatively low excess above the threshold with the available LD, the RDFB laser output is not stationary and limited in power at the 0.5 W level. In the used gradient-index fiber, the output beam has 4.5 lower divergence as compared with the pump beam thus demonstrating a new way for development of high-power fiber lasers with high-quality output.
基于瑞利散射（RS）的随机激光已在由高功率激光二极管（LD）直接泵浦的无源光纤中得到演示。由于基于 RS 的随机分布式反馈（RDFB），低质量 LD 光束（938nm）被转换为高质量激光输出（980nm）。由于可用 LD 的阈值以上的过剩相对较低，RDFB 激光输出不稳定，功率限制在 0.5W 级。在使用的梯度折射率光纤中，输出光束的发散度比泵浦光束低 4.5 倍，从而为开发具有高质量输出的高功率光纤激光器提供了一种新方法。
