Xiange Wang

Abstract Achieving low-loss optical interfaces between high-refractive-index (n > 2) components is critical for mid-infrared photonic systems, yet hindered by the trade-off between refractive index matching, IR transparency and thermal stability.

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.

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