Linearized optical discriminator

Solomon M. Serunjogi, Mahmoud S. Rasras

Research output: Contribution to journalArticlepeer-review


We present design optimization techniques for linear optical frequency discriminator filters using cascaded lattice Mach-Zehnder interferometers (CLMZI). We propose a simple method for reducing the deviation in amplitude linearity, which relies on a slight reduction of the filter's full bandwidth utilization (BWU). It is shown that a reduction in BWU as low as 5% can result in an order of magnitude improvement in the corresponding amplitude linearity. Additionally, by employing a generalized CLMZI (g-CLMZI) filter architecture with geometrically increasing delays, high linearity can be realized. For example, a three-stage (sixth order) g-CLMZI can provide deviation in linearity of less than 0.5% across the desired bandwidth. Both g-CLMZI and CLMZI architectures are optimized using nonlinear optimization techniques. Design examples of both filter types are given.

Original languageEnglish (US)
Article number6994753
Pages (from-to)386-390
Number of pages5
JournalJournal of Lightwave Technology
Issue number2
StatePublished - Jan 15 2015


  • Linear Phase
  • Optical Discriminator
  • Parks McCllellan algorithm
  • Ring Assisted Mach-Zehnder Interferometer
  • Yule-Walker Moving Average

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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