双包层光纤光栅的制备及其高功率光纤激光实验研究  

Preparation and High-Power Fiber Laser Experimentation of Double-Clad Fiber Grating

作　　者：范元媛[1,2] 周军[1] 何兵[1] 顾锡嘉 薛宇豪[1,2] 李震[1,2] 魏运荣[1] 董景星[1] 楼祺洪[1] 

机构地区：[1]中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室,上海201800 [2]中国科学院研究生院,北京100049 [3]瑞尔森大学电气与计算机工程系

出　　处：《中国激光》2010年第9期2395-2399,共5页Chinese Journal of Lasers

基　　金：国家863计划(2008AA03Z405);国家自然科学基金(609080112;60907045);上海市科技启明星计划(09QB1401700);中国科学院国家外国专家局创新团队国际合作伙伴计划资助课题

摘　　要：以248 nm的KeF准分子激光器为光源,基于相位掩模法,研究了大模场面积双包层光纤(LMA-DCF)光栅的刻写技术。在20/400μm的LMA-DCF中制备出中心波长1076.11 nm,基模反射率大于99.9%,3 dB带宽0.32 nm的光纤布拉格光栅(FBG)。用已制备的FBG作为腔镜,采用分立的光学元件后向抽运掺Yb3+光纤激光器,实现了144 W的稳定激光输出,斜率效率为60%,输出激光光谱特性同FBG的光谱特性一致。Using a 248 nm KeF excimer laser as the UV light source,the inscription method of fiber Bragg grating（FBG） on large-mode-area double-clad fiber（LMA-DCF） was studied with phase mask technique.The center wavelength of the fabricated FBG was at 1076.11 nm with a 3 dB bandwidth of 0.32 nm and reflectivity of 99.9% in the fundamental mode.The FBG was then applied to a Yb3＋-doped double-clad fiber laser as a highly reflective cavity mirror.The 144 W of stable output power with a slope efficiency of 60% was achieved.The spectral characteristics of the output laser matched well with that of the FBG and an excellent Gaussian beam shape was achieved.

关 键 词：光纤光栅 掺YB3+双包层光纤激光器 高功率 相位掩模法 

分 类 号：TN248.1[电子电信—物理电子学]