Research on new type temperature-insensitive quartz filter

A new type temperature-insensitive quartz filter is presented in this paper, which is composed of three polarizers, a quartz birefringent crystal and a quartz rotation crystal. Based on the principle that the fluctuations of the quartz birefringence and specific rotation have an opposite trend with the temperature change, the temperature effect on output center wavelength of this new type quartz filter is investigated in detail theoretically and experimentally. The theoretical and experimental results show that this new type quartz filter is indeed insensitive to temperature change. It will have a certain application in the stability output of optical filter when temperature change as we believe.