Parameters modeling of super-luminescent diode and its compensation technology

To obtain the ideal performance of fiber optic gyroscope, the effect of driving current and temperature on the characteristics of super-luminescent diode (SLD) was analyzed, and theoretical models were established for the output power, polarization degree and central wavelength with polynomial regression, whose significance was tested. In corresponding electronic circuit, a digital temperature sensor and an extra detector were utilized to calculate parameters of models in real time. Based on these models, a compensation scheme was promoted according to the effect mechanism of power, polarization degree and central wavelength on fiber optic gyroscope, and an verification experiment was tested at last. The result demonstrates that the method can compensate to some degree the variation of power caused by kinds of factors, as well as the effect on fiber optic gyroscope caused by variation of polarization degree and central wavelength in the process of compensating power variation, therefore, the performance of fiber optic gyroscope can be improved.