Wavelength selective filters represent one of the key elements for photonic integrated circuits (PIC) and many of their applications in linear and non-linear optics. In devices optimised for single polarisation operation, cross-polarisation scattering can significantly limit the achievable filter rejection. An on-chip filter consisting of elements to filter both TE and TM polarisations is demonstrated, based on a cascaded ring resonator geometry, which exhibits a high total optical rejection of over 60 dB. Monolithic integration of a cascaded ring filter with a four-wave mixing micro-ring device is also experimentally demonstrated with a FWM efficiency of -22dB and pump filter extinction of 62dB.
- integrated optical devices
- wavelength conversion devices
- photonic integrated circuits (PICs)
Cantarella, G., Klitis, C., Sorel, M., & Strain, M. J. (2017). Silicon photonic filters with high rejection of both TE and TM modes for on-chip four wave mixing applications. Optics Express, 25(17), 19711-19720. https://doi.org/10.1364/OE.25.019711