Mode-hopping suppression of external cavity diode laser by mode matching
Mode-hopping suppression of external cavity diode laser by mode matching
复制标题
通过模式匹配抑制外腔二极管激光器的跳模
DOI：
10.1364/ao.53.000694
复制
发表时间：
2014
期刊：
影响因子：
1.9
通讯作者：
Lv Tao
中科院分区：
文献类型：
--
作者：
Gong Hai;Liu Zhigang;Zhou Yangli;Zhang Weibo;Lv Tao
模式跳变是限制外腔半导体激光器（ECDL）性能的一个关键因素。我们提出了一种通过移动内腔纵模谱以匹配其他模式谱来抑制模式跳变的方法。推导了基于Littman-Metcalf组态的纵模结构模型，分析了外腔模式跳变和内腔模式跳变的特性。调谐时，最佳模式匹配点出现在输出功率的峰值处。研究了调谐元件位置固定时，不同激光二极管电流值下的短期和长期波长稳定性。实验结果表明，所提出的模式匹配方法在提高模式稳定性和降低对环境变化的敏感性方面是有效的。
Mode hopping is a critical performance limitation of external cavity diode lasers (ECDLs). We developed a method to suppress the mode hops by shifting the internal cavity longitudinal mode spectrum to match the other mode spectra. A model of longitudinal mode structure based on Littman-Metcalf configuration has been deduced for analyzing the characteristics of external cavity mode hop and internal cavity mode hop. The best mode matching point appears at the peak of output power when tuning the ECDL. Both the short-term and long-term wavelength stability were investigated in different laser diode current values while the tuning element maintains a fixed position. The experimental results demonstrated the effectiveness of the proposed mode matching methods for improving the mode stability and reducing the sensitivity to environment change.