A Compact All-Silicon Temperature Insensitive Filter for WDM and Bio-Sensing Applications

Sarvagya Dwivedi, Herbert D'heer, Wim Bogaerts
2013 IEEE Photonics Technology Letters  
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
more » ... ows 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.
doi:10.1109/lpt.2013.2282715 fatcat:aa3qefa43reazapxx6fmd2nypa