基于体布拉格光栅的高功率可调谐Er／Yb共掺光纤激光器

主要介绍基于体布拉格光栅（VBG）的宽调谐Er／Yb共掺光纤激光器．通过中心波长为976nm的半导体激光器（LD）包层泵浦Er／Yb共掺光纤，并利用VBG作为波长选择器件，在耦合进入光纤的泵浦光功率为51w的情况下，实现了13．1W的功率输出，激光中心波长为1570nm，相应的斜效率约26．6％．通过改变VBG的工作角度，实现了1532—1570nm连续可调谐激光输出，调谐范围达38nm，基本覆盖了整个光纤通信低损耗的c波段（1530—1565nm），激光功率输出水平≥10．66w．

High-power and wavelength-tunable operation of an Er/Yb co-doped fiber laser based on volume Bragg grating

A widely tunable Er/Yb co-doped fiber laser based on volume Bragg grating（VBG） is demonstrated. Clad- ding-pumped with a 976 nm laser diode （LD） and using a VBG as the wavelength selection element, a maximum out- put power of 13.1 W was obtained at 1570 nm for a launched pump power of 51 W, corresponding to a slope effi- ciency with respect to launched pump power of about 26.6%. The operating wavelength could be tuned over 38 nm from 1532 to 1570 nm at output power levels of ≥10.66 W by changing the working angle of VBG. The tuning range covers almost the whole C band （1530--1565 nm） of low loss for opticai fibers and therefore of interest for optical communication systems.