Backscattering analysis in optical micro-resonators with mode splitting based on COMSOL

Zhaohua Yang; Jiayan Huo; Xu Yang

doi:10.1117/12.2196993

8 October 2015 Backscattering analysis in optical micro-resonators with mode splitting based on COMSOL

Zhaohua Yang, Jiayan Huo, Xu Yang

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96770B (2015) https://doi.org/10.1117/12.2196993
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Rayleigh backscattering noise, which is one of the reasons that limit the sensitivity, has been deemed as noise in traditional resonant optic gyroscopes. However Rayleigh backscattering noise is one of the incentives of mode splitting phenomenon in high-Q resonators. Regarding the change of the resonance frequency of the resonator caused by the scattering signal as a measurement, we can use mode splitting to measure temperature, size of nanoparticle, etc. Light is confined by total internal reflection in whispering gallery mode (WGM) optical resonators, which is characterized by high-Q factors and small mode volumes. With regards to this, we propose a sensing mechanism based on mode splitting in high-Q WGM optical resonators. It is possible for us to measure the angular velocity of carrier according to the changes in the resonant frequencies of the two splitting modes. We propose the Miniature resonant optic gyroscope based on mode splitting (MROG-MS) with WGM resonators in the paper. Considering the Sagnac effect, mode splitting in high quality optical micro-resonators, and the rotation-induced impact on backscattering process, we modify the equations of motion that describe mode splitting, derive the explicit expression of angular rate versus the splitting amount, and verify the sensing mechanism by the simulation based on COMSOL. Furthermore, after monitoring the transmission spectra at different number of scattering particles, the simulation shows that mode splitting phenomenon resulted by single particle is more suitable for angular velocity measurement.

Citation Download Citation

Zhaohua Yang, Jiayan Huo, and Xu Yang "Backscattering analysis in optical micro-resonators with mode splitting based on COMSOL ", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96770B (8 October 2015); https://doi.org/10.1117/12.2196993

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available