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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 23 — Aug. 10, 2005
  • pp: 4846–4853

Beam expansion in thermo-optic-effect-induced total internal reflection and its applications in optical switches

Hui Yu, Xiaoqing Jiang, Jianyi Yang, Xihua Li, Qiang Zhou, and Minghua Wang  »View Author Affiliations


Applied Optics, Vol. 44, Issue 23, pp. 4846-4853 (2005)
http://dx.doi.org/10.1364/AO.44.004846


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Abstract

The beam-propagation characteristics of the total internal reflection (TIR) induced by the thermo-optic effect are investigated. Based on the Fourier heat-transmission principle and the variable separation method, we derive an analytical transient expression of the thermal field for general thermo-optic devices. With the analytical expression, the time response and steady-state temperature distribution of thermo-optic devices are presented. The beam expansion rule of TIR in the thermal field is developed mathematically, and a quantitative calculation is given as well. To illustrate the application of the rule, an X-junction 2 × 2 TIR switch with high reflection efficiency is designed through theoretical calculation. The simulation shows that the structure exhibits a high reflection coefficient; the reflection loss is only −0.76 dB. The simulation results agree well with the theoretical calculation.

© 2005 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.0130) Integrated optics : Integrated optics
(230.3120) Optical devices : Integrated optics devices

History
Original Manuscript: August 3, 2004
Revised Manuscript: October 26, 2004
Manuscript Accepted: March 21, 2005
Published: August 10, 2005

Citation
Hui Yu, Xiaoqing Jiang, Jianyi Yang, Xihua Li, Qiang Zhou, and Minghua Wang, "Beam expansion in thermo-optic-effect-induced total internal reflection and its applications in optical switches," Appl. Opt. 44, 4846-4853 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-23-4846


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References

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