Integrated Passive Nonlinear Optical Isolators

Bibliographic Details
Title: Integrated Passive Nonlinear Optical Isolators
Authors: White, Alexander D., Ahn, Geun Ho, Van Gasse, Kasper, Yang, Ki Youl, Chang, Lin, Bowers, John E., Vučković, Jelena
Publication Year: 2022
Collection: Physics (Other)
Subject Terms: Physics - Optics
More Details: Fiber and bulk-optical isolators are widely used to stabilize laser cavities by preventing unwanted feedback. However, their integrated counterparts have been slow to be adopted. While several strategies for on-chip optical isolation have been realized, these rely on either integration of magneto-optic materials or high frequency modulation with acousto-optic or electro-optic modulators. Here, we demonstrate an integrated approach for passively isolating a continuous wave laser using the intrinsically non-reciprocal Kerr nonlinearity in ring resonators. Using silicon nitride as a model platform, we achieve single ring isolation of 17-23dB with 1.8-5.5dB insertion loss, and a cascaded ring isolation of 35dB with 5dB insertion loss. Employing these devices, we demonstrate hybrid integration and isolation with a semi-conductor laser chip.
Document Type: Working Paper
DOI: 10.1038/s41566-022-01110-y
Access URL: http://arxiv.org/abs/2206.01173
Accession Number: edsarx.2206.01173
Database: arXiv
More Details
DOI:10.1038/s41566-022-01110-y