Evolution of High-order Laser Array Locking in High Peak Power Fiber Lasers

Achieving stable output and control of higher-order laser arrays has long been a challenge in the development of a passively Q-switched fiber laser. In this Letter, we reported a notable peak power of 14.9 kW alongside an average output power of 0.91 W in a passively Q-switched fiber laser. Particularly noteworthy is the observed evolution of laser modes into high-order laser arrays, extending to dimensions of up to 7 × 7 with increasing pump power. This advancement in generating high peak power laser arrays in the Q-switched states holds significant promise for applications, including optical communication and nanomicroscopic imaging.