基于半导体激光器,使用零膨胀系数材料制成超稳腔来实现窄线宽激光输出。激光二级管与光栅构成Littrow外腔,一级衍射后,小部分输出光用来锁定超稳腔,实现了激光的线宽压窄,大部分输出光注入到锥形放大器中,实现光功率放大。最终获得波长为1064nm、输出功率为290mW、线宽为10kHz的激光输出。该技术可应用于原子、分子精密光谱领域。 Based on semiconductor lasers, a stable cavity with zero expansion coefficient material is used to achieve narrow linewidth laser output. The laser diode and the grating form Littrow external cavity. After the first order diffraction, a small part of the output light is used to lock the ultra stable cavity, which realizes the laser linewidth narrowing and most of the output light is injected into the tapered amplifier to achieve the optical power enlarge. The laser output was finally obtained at a wavelength of 1064 nm, an output power of 290 mW, and a line width of 10 kHz. The technology can be applied to atomic, molecular precision spectroscopy.