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Sub-watt threshold, kilohertz-linewidth Raman distributed-feedback fiber laser

机译:亚瓦级阈值,千赫兹线宽拉曼分布式反馈光纤激光器

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摘要

We report a low-threshold, narrow linewidth Raman distributed-feedback (R-DFB) fiber laser at 1109.54 nm based on a 30 cm long center pi phase-shifted Bragg grating written directly in a commercially available germano-silica (Ge/Si) fiber. The R-DFB was pumped by a continuous-wave (CW) linearly polarized fiber source at 1064 nm, and the threshold power, full width at half-maximum (FWHM) linewidth and slope efficiency with respect to the incident pump power are measured to be 440 mW, <2.5 kHz (measured with a 29.75 km fiber delay line) and 13.5percent, respectively. An rf spectrum analyzer confirms that the R-DFB fiber laser exhibits single-frequency performance.
机译:我们报道了一种基于30厘米长的中心piπ相移布拉格光栅的低阈值,窄线宽拉曼分布反馈(R-DFB)光纤激光器,波长为1109.54 nm,该光栅直接写入市售锗硅(Ge / Si)纤维。通过连续波(CW)线性偏振光纤源在1064 nm处泵浦R-DFB,并测量阈值功率,半最大全宽(FWHM)线宽和相对于入射泵浦功率的斜率效率,以达到分别为440 mW,<2.5 kHz(用29.75 km光纤延迟线测量)和13.5%。射频频谱分析仪证实R-DFB光纤激光器表现出单频性能。

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