基于飞秒激光直写光纤光栅的掺镱光纤激光器  

Ytterbium fiber laser based on fiber Bragg grating inscribed point-by-point with femtosecond laser

作　　者：朱学华[1] 潘玉寨[1] 

机构地区：[1]哈尔滨工业大学(威海校区)光电科学系,山东威海264209

出　　处：《强激光与粒子束》2011年第4期934-938,共5页High Power Laser and Particle Beams

基　　金：哈尔滨工业大学科研创新基金项目(HIT.NSRIF.2009146);山东省自然科学基金项目(ZR2010FQ017)

摘　　要：利用飞秒激光微加工技术,可以在光纤纤芯内直写出布拉格光栅,它与传统的光纤光栅制作方法相比,具有耗时短、无需光敏光纤、周期可任意设定、光栅稳定性高等优点。采用800 nm钛宝石飞秒激光器,在Hi1060光纤内写入一支8 mm长的布拉格光栅,光纤光栅的周期为2.9μm,这是中心波长为1 042 nm的八阶光纤布拉格光栅。将所得光栅与一段有源的双包层光纤熔接,作为激光输出镜,利用975 nm的LD光纤模块作为泵浦源,采用端泵浦技术构成双包层光纤激光器。双包层光纤采用Nufern公司镱(Yb3+)离子掺杂双包层光纤,光纤长度3 m。所得激光器的输出功率为71.1 W,中心波长1 042 nm,带宽约为0.8 nm。A fiber Bragg grating（FBG） was inscribed into Corning Hi1060 fiber by focused irradiation of 800 nm femtosecond laser pulses.The FBG was 8 mm long with the period of 2.9 μm,which corresponds to an eight-order grating for 1 042 nm.As the output coupling mirror,the FBG was spliced to a 3 m long double-clad fiber to form the cavity of a fiber laser.A 975 nm laser diode fiber module was used as the end-pump light source.The double-clad fiber was provided by Nufern,with the core and cladding diameters of 10 μm and 125 μm,respectively.The laser output power was 71.1 mW in our experiment,and the center wavelength was 1 042 nm,with the bandwidth of 0.8 nm.

关 键 词：光纤光学 飞秒激光 微加工 光纤布拉格光栅 双包层光纤激光器 

分 类 号：TN153[电子电信—物理电子学]