Zhang Yiwei, Jiang Zihan, Gao Chunqing
Opt Express. 2025 Mar 10;33(5):11022-11031. doi: 10.1364/OE.553888.
A 1550 nm narrow linewidth external cavity diode laser with a cat-eye reflector has been demonstrated. Two silicon etalons are used as spectral filters, and a cat-eye reflector is used to suppress the frequency noise. The linewidth and noise characteristics of the laser are evaluated by using the delayed self-heterodyne interferometer. The laser has a Lorentzian linewidth of 5.1kHz at a maximum output power of 45 mW. The noise floor of the laser is 800Hz/Hzand the phase noise is less than 1/Hz at 1 MHz. The influences of the cat-eye reflector on the laser noise are investigated. The frequency noise caused by environmental vibration has been suppressed nearly 10 times less using the cat-eye reflector.
已展示出一种带有猫眼反射镜的1550纳米窄线宽外腔二极管激光器。使用两个硅标准具作为光谱滤波器，并使用猫眼反射镜来抑制频率噪声。通过延迟自外差干涉仪评估该激光器的线宽和噪声特性。该激光器在最大输出功率为45毫瓦时具有5.1千赫兹的洛伦兹线宽。激光器的本底噪声为800赫兹/赫兹，在1兆赫兹时相位噪声小于1/赫兹。研究了猫眼反射镜对激光器噪声的影响。使用猫眼反射镜后，由环境振动引起的频率噪声被抑制了近10倍。
