CAJ | 학술논문

通过改变F- P腔全光纤激光器中的光纤盘绕半径，对输出激光光束质量进行了研究。搭建了百瓦级全光纤激光器。最大泵浦功率为436 W的条件下，获得了300 W波长1080 nm的激光输出。光束质量M2=1.13。光-光转换效率为69%。理论分析并计算了20/400μm大模场面积双包层光纤中的两种导波模式LP01模和LP11模沿光纤径向的功率分布和弯曲损耗；利用光纤弯曲选模方法，实验上探究了光纤弯曲半径对输出激光模式及光束质量的影响。实验发现，通过光纤弯曲方式可以有效地消除高阶模式，再经过包层光剥除可以获得更好的光束质量M2=1.06。
통과개변F- P강전광섬격광기중적광섬반요반경，대수출격광광속질량진행료연구。탑건료백와급전광섬격광기。최대빙포공솔위436 W적조건하，획득료300 W파장1080 nm적격광수출。광속질량M2=1.13。광-광전환효솔위69%。이론분석병계산료20/400μm대모장면적쌍포층광섬중적량충도파모식LP01모화LP11모연광섬경향적공솔분포화만곡손모；이용광섬만곡선모방법，실험상탐구료광섬만곡반경대수출격광모식급광속질량적영향。실험발현，통과광섬만곡방식가이유효지소제고계모식，재경과포층광박제가이획득경호적광속질량M2=1.06。
By changing the fiber coil radius of F- P cavity all﹣fiber laser, the output power of the laser in the cladding and the beam quality were studied. A hundreds﹣watts class all﹣fiber laser with the output power of 300 W and wavelength of 1 080 nm was build when the maximum pump power was 436 W. The beam quality was tested of M2=1.13 and optical﹣optical conversion efficiency was 69%. The radial power distribution of the fiber guided wave modes in 20/400μm large mode area double﹣clad fiber was analyzed. Also the fiber bend loss of two guided wave modes LP01 and LP11 was calculated. By fiber bending mode selection method, the fiber bending impact on the beam quality was theoretically and experimentally studied. It is found that, fiber bending mode can effectively eliminate high﹣order guided wave mode LP11 and a better beam quality factor M2=1.06 is obtained through stripping the light in fiber clad after fiber bending.