G652光纤中背向自发拉曼散射的增益特性

Gain Characteristic Study of Amplified Backward Spontaneous Raman Scattering in the G652 Fiber

讨论了背向自发Raman散射脉冲在自生分布式G652光纤Raman放大器中传输的增益特性。实验发现,反Stokes Raman(ASR)和Stokes Raman(SR)自生分布式脉冲光纤Raman放大器的阈值抽运峰值功率是25.4 W和18.0 W。在入射功率为52 W时,ASR和SR的增益分别为5.0 dB和8.6 dB。放大的反Stokes和Stokes背向自发Raman散射光时域反射(OTDR)曲线上放大的阈值时间位置随激发功率的增高前移并具有规律性。放大的ASR背向自发散射强度受光纤温度调制,具有温度效应,已应用于远程分布光纤Raman温度传感器系统。

The gain characteristics of G652 optical fiber backward spontaneous Raman scattering pulse in the self-generating distributed G652 fiber Raman amplifier are discussed, The threshold pump powers of anti-Stokes Raman（ASR） and Stokes Raman（SR） in the self-generating distributed G652 fiber Raman amplifier are 25,4 W and 18 W respectively. When the excited power is 52 W,the gain of ASR and SR are 5.0 dB and 8,6 dB respectively. In optical time domain reflection（OTDR） curve of amplified anti-Stokes and Stokes spontaneous Raman scattering signal the threshold time changes with pump power, and will move forward with the increase pump power, Amplified anti-Stokes spontaneous Raman scattering signal has the temperature effect,and this effect has been applied to long distance distributed optical fiber temperature sensor system.