波长无啁啾调谐窄线宽掺Yb^(3+)双包层光纤激光器  

Wavelength Chirp-free Tunable Yb^(3+)-doped Double Cladding Fiber Laser

作　　者：李丽君[1] 王志[1] 范万德[1] 付圣贵[1] 张强[1] 刘丽辉[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,天津300071

出　　处：《光子学报》2005年第2期184-186,共3页Acta Photonica Sinica

基　　金：国家自然科学重点基金 ( 60137010 );科技部 863计划(2003AA312100)资助项目

摘　　要：用相位掩模法,在圆形掺Yb3+双包层光纤上制作了Bragg光纤光栅,并用它作为双包层光纤激光器的输出腔镜,在光栅反射中心波长 1055. 2nm位置得到了窄线宽的激光输出,FWHM为 0. 271nm,信噪比约为 40dB.这种结构的双包层光纤激光器,在双包层增益光纤和后腔镜间没有连接损耗,减小了双包层光纤激光器体积 用自行制作的等强度梁对作为输出腔镜的光纤光栅做双向应力调谐,实现了激光波长无啁啾调谐输出,调谐范围 1051. 1~1060. 04nm,调谐量达 8. 9nm,调谐过程中激光 3dB线宽基本无变化.Using the phase-mask method, a fiber Bragg grating is fabricated in the circle-shape inner cladding Yb3+-doped double-clad fiber (CDCF). By use of this grating as the output mirror of the CDCFL, the narrow linewidth laser operating wavelength 1055.2 nm at the reflect center of the grating is presented, FWHM is 0.271 nm and near 40 dB signal to noise ratio. There isn't splice lose between CDCF and output mirror, and the bulk of CDCFL is reduced. Using a beam of uniform strength, which is fabricated by ourselves, bi-direction chirp-free tuning of center wavelengths of the fiber grating is realized, the tuning range up to 8.9 nm is obtained from 1051.1 nm to 1060.04 nm, the output laser 3 dB linewidths didn't obviously change.

关 键 词：光纤激光器 掺Yb^3+双包层光纤 调谐 窄线宽 

分 类 号：TN253[电子电信—物理电子学]