Active wavelength control of an external cavity quantum cascade laser

作者：Tsai T; Wysocki G^*

来源：Applied Physics B: Lasers and Optics , 2012, 109(3): 415-421.

DOI：10.1007/s00340-012-5075-9

We present an active wavelength control system for grating-based external cavity lasers that increases the accuracy of predicting the lasing wavelength based on the grating equation and significantly improves scan-to-scan wavelength/frequency repeatability. The ultimate 3 sigma precision of a frequency scan is determined by the scan-to-scan repeatability of 0.042 cm(-1). Since this control method can be applied to any external cavity laser with little to no modification, such a precision provides an excellent opportunity for spectroscopic applications that target molecular absorption lines at standard atmospheric conditions.

• 出版日期2012-11