Abstract:Aiming at the obvious dependence on the differential parameters of SLD, the theoretical and experimental investigations were performed on the transfer function and compensation control of SLD. The results indicate that firstly, the transfer function between the temperature of radiation chip and the electric current of TEC has a time delay, which comes from the distance between the thermistor resistance and the radiation chip; secondly, bigger distance result in longer time delay, which is more dependent on the differential parameter; thirdly, by optimizing the differential parameter, high control precision can be achieved for all SLDs with different distance between the thermistor resistance and the radiation chip.
