Analysis of temperature characteristics of optical thin film interleaves

摘要

Interleaves play an important role in optical fiber communication and optical fiber sensing. In this paper, the realization principle and advantages of interleaves based on the optical thin film are introduced, and then the realization mode of interleaves is discussed. The method of realizing interleaves with F-P (Fabry-Perot) interference cavity is discussed, and the temperature coefficient of refractive index of interleaves is calculated by high bridge model. The influence of linear expansion coefficient and Poisson's ratio on the temperature drift of the filter is discussed. Based on this, the temperature stability of the central wavelength of the interleaves is analyzed.