Integrated TE and TM optical circulators on ultra-low-loss silicon nitride platform

P. Pintus, F. Di Pasquale, and J. E. Bowers
Publication Date
Publication Type
Journal/Conference Name
Optics Express
vol. 21, no. 4, pp. 5041-5052

In this paper, we present two four-port optical circulators for TE and TM modes, respectively. Exploiting the recent technological development concerning Ce:YIG pulse laser deposition on silicon nitride platform, we design two integrated circulators, which can be used to implement several functions in integrated optics, such as de-interleavers, input/output amplifier isolators and output laser isolators. The proposed devices combine the benefit of low loss silicon nitride waveguides with the non-reciprocal properties of magneto-optical materials. The ring crosssection has been optimized in order to maximize the non-reciprocal phase shift and finally the scattering coefficients have been computed using the transfer matrix method. The material stability and refractive index regularity of silicon nitride, the small micro-ring footprint, and the high wavelength selectivity make these devices particularly attractive.

Research Areas
Silicon Photonics
Integration Technologies
Photonics Integrated Circuits
More Research Areas
Isolators & Circulators