Williams R M, Kelly J F, Hartman J S, Sharpe S W, Taubman M S, Hall J L, Capasso F, Gmachl C, Sivco D L, Baillargeon J N, Cho A Y
Opt Lett. 1999 Dec 15;24(24):1844-6. doi: 10.1364/ol.24.001844.
Frequency stabilization of mid-IR quantum cascade (QC) lasers to the kilohertz level has been accomplished by use of electronic servo techniques. With this active feedback, an 8.5-microm QC distributed-feedback laser is locked to the side of a rovibrational resonance of nitrous oxide (N(2) O) at 1176.61cm (-1) . A stabilized frequency-noise spectral density of 42Hz/ radicalHz has been measured at 100 kHz; the calculated laser linewidth is 12 kHz.
通过使用电子伺服技术，已实现中红外量子级联（QC）激光器频率稳定至千赫兹水平。借助这种有源反馈，一台8.5微米的QC分布反馈激光器被锁定到一氧化二氮（N₂O）在1176.61厘米⁻¹处的转动 - 振动共振峰一侧。在100千赫兹处测得稳定后的频率噪声谱密度为42赫兹/√赫兹；计算得出的激光线宽为12千赫兹。
