Side-lobe reduction by cascading Bragg grating filters on a Si-photonic chip
Abstract
Bragg-grating based cavities and coupler designs present opportunities for flexible allocation of bandwidth and spectrum in silicon photonic devices. Integrated silicon photonic devices are moving toward mainstream, mass adoption, leading to the need for compact Bragg grating based designs. In this work we present a design and experimental validation of a cascaded contra-directional Bragg-grating coupler with a measured main lobe to side-lobe contrast of 12.93 dB. This level of performance is achieved in a more compact size as compared to conventional apodized gratings, and a similar design philosophy can be used to improve side-lobe reduction in grating-based mirror design for on-chip lasers and other cavity-based designs as well.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 10, 2022
- Source ID
- 10.1364/oe.446588
Entities
People
- Andrew Grieco
- Naif Alshamrani
- Sushant Kumar
- Yeshaiahu Fainman
Organizations
- Army Research Office
- Defense Advanced Research Projects Agency
- King Abdulaziz City for Science and Technology
- National Science Foundation
- Office of Basic Energy Sciences
- Office of Naval Research
- University of California
- University of Rochester