报道了中心波长为1653 nm的窄线宽拉曼光纤放大器。该放大器为全光纤结构，种子源为平均功率8 mW、线宽2 MHz的分布式反馈(DFB)半导体激光器，抽运源为中心波长为1541 nm的掺铒光纤激光器，拉曼增益介质为长500 m的高非线性光纤(HNLF)。在3.32 W抽运功率下，拉曼光纤放大器输出功率为260 mW，放大器增益为15.1 dB，斜率效率约为12%。由于激光器输出波长位于甲烷气体的一个强吸收峰，可广泛应用于大气环境监测和天然气运输管道泄漏探测等多个领域。

A 1653 nm Raman fiber amplifier with a narrow line-width output, which adopts the all-fiber configuration is reported. The Raman seeder is a distributed feed back (DFB) diode laser with 8 mW output power and 2 MHz linewidth. The pump source is a 1541 nm Er-doped fiber laser. The Raman gain fiber is 500-m long nonlinear fiber (HNLF). When the pump power is 3.32 W, the output power of the Raman fiber amplifier is 260 mW, corresponding to 15.1 dB gain and 12% slope efficiency. Since the central wavelength of this laser is located at one strong absorption peak of methane molecular, it can be used in many fields, such as the atmosphere monitor and natural gas leak detection system.