论文部分内容阅读
构建了一种基于Littman-Metcalf结构的外腔半导体激光器。该激光器采用基于星形柔性铰链转动机制的紧凑型设计,并利用有限元分析的方法对其机械结构进行了分析及设计,转动臂实现了高达3.7kHz的基模共振频率。根据无跳模调谐条件对外腔设计进行了优化,提高了激光器的性能。该激光器为单纵模运转,工作波长约为780nm,无跳模调谐范围大于等于80GHz,且在无重新装调情况下可稳定工作一年以上,表明激光器具有良好的可靠性。同时该激光器可锁定在87 Rb(F=2→F′=2,3)吸收峰上,持续时间超过24h,其线宽为200kHz,温度稳定度为35MHz/℃,且稳频激光器的Allen方差在测量时间为3s时可达到3.5×10-11,24h内光功率波动小于0.75%,具有较高的稳定性。
An external cavity semiconductor laser based on Littman-Metcalf structure was constructed. The laser uses a compact design based on a star-shaped flexible hinge rotation mechanism. The mechanical structure of the laser is analyzed and designed by means of finite element analysis. The rotating arm achieves the fundamental mode resonance frequency up to 3.7 kHz. The design of the external cavity is optimized based on no-mode-tuning conditions and improves the performance of the laser. The laser operates in a single longitudinal mode with a working wavelength of about 780 nm and a non-hopping mode tuning range of greater than or equal to 80 GHz and can work stably for more than one year without reloading, indicating that the laser has good reliability. At the same time, the laser can be locked at the 87 Rb (F = 2 → F ’= 2,3) absorption peak for more than 24 h with a linewidth of 200 kHz and a temperature stability of 35 MHz / In the measurement time of 3s can reach 3.5 × 10-11, 24h optical power fluctuations less than 0.75%, with high stability.