基于棱镜耦合自注入锁定技术的窄线宽激光器

Narrow-linewidth lasers have broad application prospects in coherent communication, ultrafast optical ranging, atomic clocks, and LiDAR. This paper presents a linewidth-compression scheme for lasers based on prism-coupled self-injection locking technology. Numerical simulations were conducted to investigate the effects of phase-locking conditions and microresonator-prism coupling efficiency on the laser locking performance. In the experiment, a magnesium fluoride microdisk cavity with a quality factor of up to 1.8×10^9 was fabricated using mechanical polishing techniques. The prism-cNarrow-Linewidth Laser Based on Prism-Coupled Self-Injection Locking Technologyoupled self-injection-locked laser system achieved a narrow-linewidth laser output with an instantaneous linewidth of 99 Hz. This resulted in a linewidth narrowing effect of more than three orders of magnitude.