啁啾倾斜Bragg光纤光栅制作及Raman滤除研究  

Fabrication of Chirped and Tilted Fiber Bragg Gratings and Investigation of Raman Filtering Effect

作　　者：张宇菁[1] 王蒙[1] 王泽锋[1] 曹涧秋[1] 肖虎[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2017年第1期59-67,共9页Acta Optica Sinica

基　　金：国家自然科学基金面上项目(11274385)

摘　　要：受激拉曼散射(SRS)是制约光纤激光器功率进一步提升的重要因素之一。提出利用啁啾倾斜Bragg光纤光栅(CTFBG)抑制SRS,针对1018nm光纤激光SRS信号设计并制作了1066nm啁啾倾斜光纤光栅,搭建实验系统,对拉曼信号滤除效果进行了验证。结果表明,设计的CTFBG对1级SRS信号的抑制接近20dB,取得了很好的效果。研究结果对利用CTFBG抑制大功率光纤激光振荡器和放大器中的SRS,进一步提高光纤激光的效率和输出功率具有一定意义。Stimulated Raman scattering（SRS）is one of the important factors which restrict the further improvement of fiber laser power.We propose that using chirped and tilted fiber Bragg gratings（CTFBGs）can suppress SRS.According to the design of optical fiber laser SRS signal of 1018 nm,a CTFBG of 1066 nm is fabricated.An experimental system is established to verify the filtering effect of Raman signal.Results show that the designed CTFBG can suppress the first-order SRS signal about 20 dB,and achieve a good effect.The research results have certain significance for suppressing SRS in high power fiber laser oscillator and amplifier with CTFBG,and for further improving the efficiency and output power of fiber lasers.

关 键 词：光纤光学 倾斜Bragg光纤光栅 光纤激光器 受激拉曼散射 

分 类 号：TN247[电子电信—物理电子学] TN253