Author(s): Wang, X (Wang, Xun); Lai, BH (Lai, Boheng); Meng, S (Meng, Shuai); Dong, LZ (Dong, Lizhi); Guo, YD (Guo, Yading); Yang, P (Yang, Ping); Zhao, W (Zhao, Wang); Chen, SQ (Chen, Shanqiu); Su, CX (Su, Chunxuan); Yu, X (Yu, Xin); Yang, KJ (Yang, Kangjian); Tang, GM (Tang, Guomao); He, X (He, Xing); Wang, S (Wang, Shuai); Xu, B (Xu, Bing) 

Source: OPTICS COMMUNICATIONS  Volume: 449  Pages: 94-99  DOI: 10.1016/j.optcom.2019.05.047  Published: OCT 15 2019   

Abstract: The unstable ring resonator is a promising architecture for high power solid-state oscillators with intra-cavity adaptive optics. In this paper, we present adaptive compensation of intra-cavity fill in an Nd: YAG unstable ring laser using a probe beam and a far-field camera to detect the fill. A numerical model of the ring resonator is established based on the Fox-Li method, through which the influence of intra-cavity fill is studied, and the optimal strategy of fill correction is proposed and evaluated. An experiment with an unstable Nd: YAG slab ring laser is developed. With 40 mu rad fill on the zigzag direction and 130 mu rad fill on the non-zigzag direction compensated during lasing, the output power increased from 77.2W to 87.0W. The above results lay the foundation for adaptive optics techniques to compensate for the intra-cavity aberrations in high power solid-state unstable ring lasers. 

ISSN: 0030-4018 

eISSN: 1873-0310