Abstract

In laser isotope separation, spectroscopy and lidar, a frequency-tunable laser and a technique to stabilize the frequency at a required value are important. There have been several reports on stabilizing the semiconductor laser (SL) frequency. However, frequency stabilization has been achieved only at particular values, for example, the resonance frequency of an atom such as rubidium,¹ or discrete values defined by the free spectral range (FSR) of the Fahry-Perot interferometer (FPI).² In this paper, we propose a new method to stabilize the laser frequency at the required value by locking the sideband generated by passage through the traveling-wave EO-modulator (TWEOM) to a actively stabilized FPI. Moreover, we report the result of frequency stabilization and tunability of a SL using this method.

© 1995 IEEE