EDGE FREQUENCY STABILIZATION SYSTEM FOR SEMICONDUCTOR LASER

The present invention relates to an edge frequency stabilization system for a semiconductor laser. An edge of an atomic or molecular absorption spectral line is used as a reference for expanding a frequency stabilization range according to the present invention. A visible light frequency range of a semiconductor laser can be expanded, and frequency stabilization of an infrared frequency range can be realized by utilizing an edge of a molecular reference, so that a frequency stabilization range of an existing frequency stabilization method for a semiconductor laser is greatly widened. The frequency stabilization achieves a complete electrical feedback, and the manufacturing cost is low. Since a peak value of the atomic absorption spectral line is locked to generate a constant sinusoidal signal amplitude, the frequency stabilization precision can reach the frequenc