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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 26, Iss. 11 — Jun. 1, 2008
  • pp: 1367–1373

Refractive-Index Profiling of Buried Planar Waveguides by an Inverse Wentzel–Kramer–Brillouin Method

Kin Seng Chiang, Qing Liu, and Kar Pong Lor

Journal of Lightwave Technology, Vol. 26, Issue 11, pp. 1367-1373 (2008)


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Abstract

We propose an inverse Wentzel–Kramer–Brillouin (WKB) method for the construction of the refractive-index profiles of buried graded-index planar waveguides from the measured effective indexes of the guided modes. Our method involves experimental determination of the location of the peak index in the buried profile, measurement of the effective indexes in air, and an index-matching liquid, and application of a searching algorithm to find the best-fit profile through inverting the WKB equations. We present numerical examples and experimental results to demonstrate the performance of the method.

© 2008 IEEE

Citation
Kin Seng Chiang, Qing Liu, and Kar Pong Lor, "Refractive-Index Profiling of Buried Planar Waveguides by an Inverse Wentzel–Kramer–Brillouin Method," J. Lightwave Technol. 26, 1367-1373 (2008)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-26-11-1367

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