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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 21,
  • Issue 12,
  • pp. 3144-
  • (2003)

High-Resolution Photonics-Based Interference Suppression Filter With Wide Passband

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Abstract

A new topology for a photonic signal processor, which overcomes the basic recursive frequency response problem that limits the passband range,is presented. The structure is based on a new multiple-wavelength offset-cavity structure that is cascaded with a series of unbalanced delay line structures. This not only can synthesize a very narrow notch response with good shape factor but also permits a multifold extension of the free spectral range (FSR) and passband width. Results on the interference mitigation filter demonstrate a stopband of 1% of center frequency and a fourfold increase in the FSR and passband width, while also having a very small shape factor, in excellent agreement with predictions.

© 2003 IEEE

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