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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 3 — Jan. 20, 1997
  • pp: 642–647

Postfabrication optimization of an autoregressive planar waveguide lattice filter

Christi K. Madsen and Jian H. Zhao  »View Author Affiliations


Applied Optics, Vol. 36, Issue 3, pp. 642-647 (1997)
http://dx.doi.org/10.1364/AO.36.000642


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Abstract

Narrow-band planar waveguide filters are sensitive to fabrication errors that make it difficult to realize multistage filters successfully and maintain tight center wavelength tolerances unless a tuning technique is available. An analysis algorithm combined with waveguide heaters has been successfully used to demonstrate that fabrication errors can be compensated in an autoregressive (AR) lattice architecture that makes it possible to concatenate conveniently multiple stages and to achieve higher-order filter functions. Compensation of fabrication errors on filter functions for a second- and third-order AR lattice filter is presented, and issues related to the application of the analysis algorithm are discussed. In combination with postfabrication tuning of the coupling ratios, the analysis algorithm will allow complete control of the filter function after fabrication.

© 1997 Optical Society of America

History
Original Manuscript: December 18, 1995
Revised Manuscript: July 17, 1996
Published: January 20, 1997

Citation
Christi K. Madsen and Jian H. Zhao, "Postfabrication optimization of an autoregressive planar waveguide lattice filter," Appl. Opt. 36, 642-647 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-3-642

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