Analysis of Time Delay in the Temperature Control Model of Super-luminescent Diode for FOG

摘要

Aim at the obvious dependence on the differential parameter of Super-luminescent diode (SLD), the theoretical and experimental investigation of the SLD transfer function and corresponding control parameters have been done. Results indicate that, i) the transfer function between temperature of radiation chip and electric current of TEC has a time delay, which comes from the distance between thermistor resistance and radiation chip; ii) the further of the distance between thermistor resistance and radiation chip, the longer of the time delay, which more obvious dependence on the differential parameter; iii) through optimizing the differential parameter, high control precision could be achieved for all SLDs produced by different factories, which distance between thermistor resistance and radiation chip is much different. Above results could help to understand the source of the time delay and the function of differential parameter in the temperature control process of SLD.