The Design of Laser Wavelength Measuring System Based on DSP

The main factors influencing the output wavelength of semiconductor are drift of working temperature and changes of working current. Therefore, the key technology of semiconductor frequency stabilization is to detect frequency shifts and convert the shifts into electrical signal, then feedback control the working current and the temperature in order to ensure that the output frequency basically remains unchanged. So, a laser wavelength measuring system based on DSP is designed in this paper. The measurement theory of the system and the design of hardware are given in this paper. The system is composed of DSP, optical grating, CCD and so on. This measurement method introduced in this paper makes the measurement intelligent and has high degree of accuracy of measurement.