Research on the pulse-width modulation working mode and spectrum-related issues of high-precision temperature control

Several working modes of pulse width modulation in high-precision temperature control for the light source of fiber-optic gyroscope were introduced, with the analysis of its working processes in this article. The output signal and spectrum in the process of conversion and cross-over were analyzed on the problem of electromagnetic interference introduced by the working mode of pulse width modulation. Study found that in the process of pulse width modulation, the frequency and pulse width of the output signal are complex, irregular, and its spectrum position changes randomly and unpredictably. Its power distribution is no longer compatible with the characteristics of cyclic rectangular pulse spectrum. Aiming at the random spectrum, several effective solutions were put forward, and an experimental verification of one solution was provided.