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本文进行了1031 nm抽运光对1080 nm单频信号光的拉曼放大实验,详细研究了单频信号光种子功率、拉曼增益光纤长度、抽运方式等因素对单频光纤拉曼放大器(SF-FRA)输出特性的影响.结果表明,在未受受激布里渊散射(SBS)因素限制时,相同抽运功率条件下,单频信号光种子功率越高,SF-FRA的效率越高;拉曼增益光纤越长,SF-FRA的效率越高;前向抽运时,SF-FRA的效率较高.实验中发现SF-FRA的拉曼放大过程对单频信号光的线宽有较小的展宽.此外,单频信号光远场干涉短曝光图像的对比度为0.814,单频信号光与SFFRA放大光远场干涉短曝光图像可见度为0.719,表明SF-FRA对单频信号光的相干性有一定影响.实验结论可为其他特殊波长SF-FRA的设计提供一定的参考.
In this paper, the Raman amplification of single-frequency signal light at 1080 nm with 1031 nm pumping light is studied. The influence of single-frequency signal light seed power, Raman gain fiber length and pumping mode on the Raman amplification of single- SF-FRA). The results show that the SF-FRA’s efficiency is higher under the same pumping power without the SBS constraint, The higher the Raman gain, the higher the efficiency of SF-FRA, and the higher the efficiency of SF-FRA in forward pumping.In the experiment, it is found that the bandwidth of SF-FRA for single-frequency signal light In addition, the contrast of the single-frequency signal far-field interference short-exposure image is 0.814, the single-frequency signal light and the SFFRA amplification far-field interference short exposure image visibility is 0.719, The experimental conclusion can provide some references for the design of SF-FRA with other special wavelengths.