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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 7 — Jul. 1, 2012
  • pp: 1648–1654

Wavelength-scale microdisks as optical gyroscopes: a finite-difference time-domain simulation study

Raktim Sarma, Heeso Noh, and Hui Cao  »View Author Affiliations


JOSA B, Vol. 29, Issue 7, pp. 1648-1654 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001648


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Abstract

We have developed a finite-difference time-domain algorithm to simulate a wavelength-scale optical gyroscope based on a circular microdisk. In addition to the frequency shift, the rotation-induced changes in the quality factor and far-field emission pattern of the whispering gallery modes are studied. Compared to the closed cavity of same size and shape, an open cavity displays a larger frequency splitting by rotation, due to an increase of the mode size. When the disk dimension is on the order of the optical wavelength, the relative change in quality factor by rotation is over an order of magnitude larger than that in resonant frequency, due to enhanced evanescent tunneling of light. These results point to multiple methods for rotation sensing, monitoring the lasing threshold and the output power or the far-field emission pattern of a rotating microdisk laser, which can be much more sensitive than the Sagnac effect in ultrasmall optical gyroscopes.

© 2012 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(060.2800) Fiber optics and optical communications : Gyroscopes
(120.5790) Instrumentation, measurement, and metrology : Sagnac effect
(140.3370) Lasers and laser optics : Laser gyroscopes
(140.4780) Lasers and laser optics : Optical resonators

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 13, 2012
Manuscript Accepted: May 10, 2012
Published: June 14, 2012

Citation
Raktim Sarma, Heeso Noh, and Hui Cao, "Wavelength-scale microdisks as optical gyroscopes: a finite-difference time-domain simulation study," J. Opt. Soc. Am. B 29, 1648-1654 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-7-1648


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