Second harmonic generation in resonant optical structures
| DWPI Title: Optical apparatus for generating output wave, has optical coupler that excites one of first and second modes whose thickness is less than one-half of in-material wavelength of pump wave for propagation within nonlinear optical medium |
| Abstract: An optical second-harmonic generator (or spontaneous parametric down-converter) includes a microresonator formed of a nonlinear optical medium. The microresonator supports at least two modes that can be phase matched at different frequencies so that light can be converted between them: A first resonant mode having substantially radial polarization and a second resonant mode having substantially vertical polarization. The first and second modes have the same radial order. The thickness of the nonlinear medium is less than one-half the pump wavelength within the medium. |
| Use: Optical apparatus for generating output wave. |
| Advantage: The surface roughness is greatly reduced, and optical performance is improved. The coupler is allowed to more easily approach the disk, while remaining physically separated from the chip surface and edges. The effective nonlinearity of the system is reduced and the power conversion rate is reduced. |
| Novelty: The apparatus has an optical coupler that injects a pump wave into a microresonator (804) from a pump source, and excites one of first and second modes. The modes have same radial order which is an integer at least 1. The pump wave and first and second modes have a respective frequency and a respective in-material wavelength for propagation within a nonlinear optical medium. The second-mode frequency is twice the first-mode frequency. The thickness is less than one-half of in-material wavelength of the pump wave for propagation within the nonlinear optical medium. |
| Filed: 6/5/2017 |
| Application Number: US15614105A |
| Tech ID: SD 13460.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |