Temperature Insensitive Waveguide Interferometer based on Subwavelength Gratings

Abstract

We present a design for a temperature insensitive Mach-Zehnder interferometer in which temperature-compensating segment is achieved through tailored subwavelength gratings. By engineering the thermal response and the relative length of this segment, an overall temperature insensitivity below ±4pm/°K is predicted for 100nm bandwidth around 1550nm.