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We propose a compact, temperature-insensitive, all-silicon Mach-Zehnder interferometer (MZI) filter that uses the polarization-rotating asymmetrical directional couplers. Temperature sensitivity of the filter is less than 8pm/K for a wavelength range of 30 nm. The device achieves a reduced footprint by making use of different polarizations, which is made possible by the asymmetric directional couplers that act both as a splitter/combiner and as a polarization rotator. Simulation of the devicedoi:10.1109/lpt.2013.2282715 fatcat:aa3qefa43reazapxx6fmd2nypa