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1064 nm、输出功率为290 mW、线宽为10 kHz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, the zero-expansion coefficient material is employed to build an ultra-stable cavity which is used to realize a narrow linewidth laser output. A laser diode and a grating are combined to form a Littrow structural external-cavity. After the first order diffraction, a small part of the output beam is used to lock the ultra-stable cavity which realizes the linewidth narrowing, and most of the output beam is injected into a tapered amplifier to achieve an amplification of optical power. A laser output with the wavelength of 1064 nm, output power of 290 mW and linewidth of 10 kHz is finally acquired. This technique can be applied in the area of atomic and molecular precision spectroscopy.