全光纤激光相干合成光谱响应特性研究

Numerical Analysis of Spectal Response of All-fiber Coherent Beam Combining

基于N-腔镜谐振腔理论对全光纤激光相干合成进行了理论分析,数值模拟了迈克尔逊型相干合成激光器的光谱特性,对两个光纤Bragg光栅的中心波长差和两路光的光程差对合成光谱特性的影响给出了理论解释.用啁啾光纤光栅取代其中一个光纤Bragg光栅,使激光相干合成的带宽由0.3 nm拓展到1.0 nm.

Theoretical analysis of all-fiber coherent beam combining is presented in this paper by using N- mirror resonator theory. The spectal behavior of Micelson type coherent fiber laser is numerical simulated. Theoretical explanation is given out on the resonant wavelength differece of the two fiber Bragg gratings and optical length difference influenced the spectral character. Coherent bandwidth is expanded from 0.3 nm to 1.0 nm,when the chirped fiber grating substitutes one of the FBGs.