用于相干合成大模面积光纤放大器的实验研究  

Experimental Study of Large-Mode-Area Fiber Amplifier for Coherent Combination

作　　者：郭占城[1] 付圣贵[1] 贾秀杰[1] 刘艳格[1] 司立彬[1] 张健[1] 袁树忠[1] 董孝义[1] 

机构地区：[1]南开大学现代光学研究所

出　　处：《光子学报》2007年第9期1660-1663,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(60137010和60407005);国家重大基础研究和发展项目(2003CB314906)资助

摘　　要：报道了一种用于激光束相干合成的大模面积掺镱双包层光纤放大器的实验研究,采用后向抽运的方式,放大器输出功率为1 .61 W,放大后信号光的3 dB线宽为0 .027 nm,并保持了输入信号光的优良光谱特性.从实验上深入研究了在该种放大器中,剩余抽运光功率、前向输出功率、后向输出功率等随抽运功率变化的规律.实验研究的目标是探索相干合成的方法,所设计的输出激光束线宽既保证了足够的相干长度,同时又能有效抑制受激布里渊散射.Experimental research of a backward-pumped large-mode-area ytterbium-doped double-cladding fiber amplifier was reported for the use of the laser beam coherent combination. The amplifier obtained the highest output power of 1.61 W,with the amplified signal having the 3 dB linewidth of 0. 027 nm at the peak wavelength of 1 058.37 nm,preserving the exceptional spectrum characteristics of the original signal. For the first time,was experimentally investigated the power evolvement of the residual pump beam, the forward beam,the backward beam and et al. in this type of amplifier. The aim of this research was to explore the feasible project of the laser beam coherent combination. The designed linewidth of the laser beam both alleviated the coherent combination and suppressed Stimulated Brillouin Scattering （SBS） effectively.

关 键 词：光纤元件 掺镱双包层光纤放大器 大模面积 相干合成 

分 类 号：TN253[电子电信—物理电子学]