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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 27, Iss. 11 — Jun. 1, 2009
  • pp: 1514–1521

Inverse Algorithm With Built-In Spatial Filter to Obtain the 2-D Refractive Index Profile of Optical Waveguides From the Propagating Mode Near-Field Profile

Samit Barai and Anurag Sharma

Journal of Lightwave Technology, Vol. 27, Issue 11, pp. 1514-1521 (2009)


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Abstract

We propose a modified inverse regularization algorithm for computing the 2-D refractive index profiles of integrated-optic waveguides from measured near-field data. The algorithm involves embedding of a spatial mean filter to remove impulses and high frequency noises from the near-field intensity as well as from its second derivative. The proposed filtering scheme is built-in to the inverse algorithm and does not require extra computation for filtering. The effectiveness of the proposed method is demonstrated by reconstructing the Refractive index profile of a single mode lithium niobate channel waveguide from the propagating mode near-field intensity pattern.

© 2009 IEEE

Citation
Samit Barai and Anurag Sharma, "Inverse Algorithm With Built-In Spatial Filter to Obtain the 2-D Refractive Index Profile of Optical Waveguides From the Propagating Mode Near-Field Profile," J. Lightwave Technol. 27, 1514-1521 (2009)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-27-11-1514

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