Frequency stabilization of long wavelength semiconductor laser via optogalvanic effect

摘要

Frequency stabilization of a long wavelength semiconductor laser is achieved by employing the optogalvanic effect in a feedback control loop with the laser. Absolute references are obtained using noble gases such as argon (1.2 mu m to 1.4 mu m) and krypton (1.4 mu m to 1.6 mu m). Standard detection, feedback control and dithering lock-in techniques are used to insure proper frequency stabilization.