title: Passive coherent beam combining of four Yb-doped fiber amplifier chains with injection-locked seed source.
abstract: An injection-locked fiber laser is introduced to the passive fiber laser coherent beam combination with all-optical feedback loop. A coherent beam combining system with two-dimensional four Yb-doped fiber amplifier chains is established, and the injection-locked fiber laser works as a switchable seed source. The 1064 nm output laser of the injection-locked fiber laser is extinguished automatically as the feedback injection power is high enough, and the injection-locked fiber laser acts as an amplifier for the feedback laser with 7.4 dB gains. We find that the phase-locked far-field interference pattern of our system with seed laser extinguished is stable, and the visibility is up to 91.5%, which is slightly higher than the prevalent method with auxiliary seed laser (88.2%).
authors.affiliation: Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Yang
authors.forename: Man
authors.initials: M
authors.lastname: Hu
authors.forename: Bing
authors.initials: B
authors.lastname: He
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Houkang
authors.initials: H
authors.lastname: Liu
authors.forename: Shoujun
authors.initials: S
authors.lastname: Dai
authors.forename: Yunrong
authors.initials: Y
authors.lastname: Wei
authors.forename: Qihong
authors.initials: Q
authors.lastname: Lou