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Sidewall gratings in ultra-low-loss Si3N4 planar waveguides
Michael Belt1, Jock Bovington, Renan Moreira
1Electrical and Computer Engineering Department, University of California, Santa Barbara California 93106, USA. michaelbelt@ece.ucsb.edu
Optics Express
|February 8, 2013
Abstract:
We demonstrate sidewall gratings in an ultra-low-loss Si3N4 planar waveguide platform. Through proper geometrical design we can achieve coupling constant values between 13 and 310 cm(-1). The TE waveguide propagation loss over the range of 1540 to 1570 nm is below 5.5 dB/m.
