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Authors: S. Dwivedi, H. D'heer, W. Bogaerts
Title: A compact all-silicon temperature insensitive filter for WDM and bio-sensing applications
Format: International Journal
Publication date: 11/2013
Journal/Conference/Book: IEEE Photonics Technology Letters
Editor/Publisher: IEEE, 
Volume(Issue): 25(22) p.2167 - 2170
Internal Reference: [N-1517]
DOI:
Download: Download this Publication (903KB) (903KB)

Abstract

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 device shows that it can also be useful for gas sensing and bio-sensing applications with 3 times larger response to cladding changes while keeping a thermally robust behavior.

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