用乙炔稳频二极管-泵浦Er-Yb玻璃激光器

Frequency Stabilization of Diode-Pumped Er-Yb Glass Laser by Acetylene

介绍了一种新颖的二极管-泵浦Er-Yb玻璃激光器,利用Pound-Drever-Hall技术并采用乙炔分子P(15)线对其实现了稳频。实验装置中将两个激光器的出射波长锁定到同一气室的乙炔P(15)吸收曲线的同一侧,使得温度对吸收峰值频率产生的漂移和温度导致气压变化使线宽增宽均对频率稳定性不产生影响。通过测量两个相同激光器系统间出射光波的拍频发现,激光的短期带宽窄于50kHz,通过频率波动情况得出激光器有较高的相对频率稳定度。改进后的激光器稳定性和重复性显著提高,适合于实现高精度的光学频率标准。

A novel diode-pumped Er-Yb glass laser is introduced, and its frequency is stable after using Pound-Drever-Hall technique and acetylene P（15） line. In the experiment, the wavelength of the laser device is locked to the gas chamber by using the same side of acetylene P（15） absorption line. Temperature shifts produced by the absorption peak frequency as well as line broadening owing to variations of gas pressure induced by temperature do not contribute appreciably to these frequency fluctuations. The beat frequencies of the emission wavelength that from the same two lasers are measured, so it is found that the short-term bandwidth is narrower than 50 kHz. By observing frequency fluctuations, it is concluded that the laser has higher relative frequency stability. The stability and repeatability of the improved laser are significantly increased and suitable to the high-precision optical frequency standard.