LTF Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel, Bellevaux 51, 2000 Neuchâtel, Switzerland.
Opt Lett. 2011 Aug 15;36(16):3109-11. doi: 10.1364/OL.36.003109.
The frequency noise properties of commercial distributed feedback quantum cascade lasers emitting in the 4.6 μm range and operated in cw mode near room temperature (277 K) are presented. The measured frequency noise power spectral density reveals a flicker noise dropping down to the very low level of <100 Hz(2)/Hz at 10 MHz Fourier frequency and is globally a factor of 100 lower than data recently reported for a similar laser operated at cryogenic temperature. This makes our laser a good candidate for the realization of a mid-IR ultranarrow linewidth reference.
本文介绍了在室温（277 K）附近连续波模式下工作、发射 4.6 μm 波段的商用分布反馈量子级联激光器的频率噪声特性。测量得到的频率噪声功率谱密度显示闪烁噪声降低到 10 MHz 傅里叶频率下的非常低水平 <100 Hz(2)/Hz，并比最近报道的在低温下工作的类似激光器的数据低 100 倍。这使得我们的激光器成为实现中红外超窄线宽基准的良好候选者。
