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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 8 — Apr. 14, 2008
  • pp: 5227–5240

Finite-difference time-domain algorithm for modeling Sagnac effect in rotating optical elements

Chao Peng, Rui Hui, Xuefeng Luo, Zhengbin Li, and Anshi Xu  »View Author Affiliations


Optics Express, Vol. 16, Issue 8, pp. 5227-5240 (2008)
http://dx.doi.org/10.1364/OE.16.005227


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Abstract

Electrodynamics in rotating optical elements has attracted much interest due to its potential application to ultra-sensitive rotating sensing. And it is important to investigate the Sagnac effect in some novel photonic structures for it may lead to a variety of unusual manifestations. We propose a Finite-Difference Time-Domain (FDTD) method to model the Sagnac effect, which is based on the modified constitutive relation in rotating frame. The time-stepping expressions for the FDTD routine are derived and discussed, and the classical Sagnac phase shift along a waveguide is calculated. Further discussions about numerical dispersion, dielectric boundary condition and perfect matched layer (PML) absorbing boundary conditions in the rotating FDTD model are also presented respectively. The theoretical analysis and simulation results prove that the numerical algorithm can analyze the Sagnac effect effectively, and can be applied to general cases with various material properties and complex geometric structures. The proposed algorithm provides a promising systematic tool to study the properties of rotating optical elements, and to accurately analyze, design and optimize rotation sensitive optical devices.

© 2008 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

ToC Category:
Physical Optics

History
Original Manuscript: January 25, 2008
Revised Manuscript: March 21, 2008
Manuscript Accepted: March 22, 2008
Published: April 1, 2008

Citation
Chao Peng, Rui Hui, Xuefeng Luo, Zhengbin Li, and Anshi Xu, "Finite-difference time-domain algorithm for modeling Sagnac effect in rotating optical elements," Opt. Express 16, 5227-5240 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-8-5227


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