Abstract

Bragg gratings based devices have been widely employed in communication and sensing systems [1-2]. Conventional waveguide Bragg grating is a two-port device, so reflected light will damage the stability of the laser via its input port. Therefore, it is meaningful to design a waveguide Bragg grating with the separation of the input and the reflection in integrated photonic circuits. In this work, we design and fabricate anti-symmetric Bragg gratings in a multimode silicon strip waveguide, in which the contra-directional coupling occurs between the TE₀ and the TE₁ modes. An adiabatic coupler is used to drop the reflected TE₁ mode.

© 2017 IEEE