基于八字腔锁模Yb光纤激光器的超连续谱激光源  

All Fiberized Supercontinuum Laser Source Based on "Figure of Eight" Cavity Mode-locked Yb Fiber Laser

作　　者：钱凯[1] 魏凯华[1] 陈滔[1] 姜培培[1] 蔡双双[2] 吴波[1] 沈永行[1] 

机构地区：[1]浙江大学光电系现代光学仪器国家重点实验室,杭州310027 [2]温州医学院信息与工程学院,浙江温州325035

出　　处：《光子学报》2013年第5期521-525,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61078015);国家重点基础研究发展计划(No.2011CD311803);温州市科技计划项目(No.H20100024)资助

摘　　要：报道了一种利用八字腔锁模的全光纤化结构的亚纳秒脉冲光纤激光器,其输出脉冲经过光纤化的一级衍射声光调制器实现了可变的脉冲选单以降低脉冲重复频率.从2.78MHz降低重频至93kHz后的激光脉冲经过第二级功率放大,放大斜率效率为68.1%,获得脉冲峰值功率超过25kW的激光输出.以此激励一段经优化后3m长的Bi离子掺杂的石英光纤和20m普通单模石英光纤,最终获得了波长覆盖1100～2200nm、光谱平坦度优于3dB的稳定超连续谱激光光源输出.An all fiberized novel sub-ns pulsed fiber laser was presented based on the 'figure-of-eight' cavity mode-locking.The output pulse train was directed to pass a fiberized acousto-optic modulator based on first-order diffraction to reduce the pulse repetition rate from 2.78 MHz to 93 kHz by adjustable pulse picking.After the repetition rate decreasing,the peak power of the pulse laser was over 25 kW with the second amplifier,of which slope efficiency was 68.1%.Then the laser was used to excite bismuth doped silica fiber with optimization fiber length of 3m for supercontinuum generation.Finally the obtained laser spanned a spectral range of 1 100~2 200 nm with flatness better than 3 dB.

关 键 词：光纤激光器 锁模 放大 超连续谱 

分 类 号：TN248.1[电子电信—物理电子学]