All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers.
All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers.
复制标题
量子级联激光器中的全电频率噪声降低和线宽变窄。
DOI：
10.1364/ol.39.006411
复制
发表时间：
2014
期刊：
影响因子：
3.6
通讯作者：
T. Südmeyer
中科院分区：
文献类型：
--
作者：
I. Sergachev;R. Maulini;A. Bismuto;S. Blaser;T. Gresch;Y. Bidaux;A. Müller;S. Schilt;T. Südmeyer
提出了一种降低量子级联激光器（QCL）频率噪声的全电方法。连续调节通过激光器的电流以补偿激光器内部电阻的波动，这导致光发射频率的主动稳定。当将此方法应用于发射波长为7.9 μ m的QCL时，在10 ms的观测时间内，线宽从标准恒流工作模式下的1.7 MHz降低到480 kHz。
A novel all-electrical method of frequency noise reduction in quantum cascade lasers (QCLs) is proposed. Electrical current through the laser was continuously adjusted to compensate for fluctuations of the laser internal resistance, which led to an active stabilization of the optical emission frequency. A reduction of the linewidth from 1.7 MHz in the standard constant current mode of operation down to 480 kHz is demonstrated at 10-ms observation time when applying this method to a QCL emitting at 7.9 μm.