Reconfigurable linear optical FM discriminator

Mahmoud S. Rasras, Young Kai Chen, Kun Yii Tu, Mark P. Earnshaw, Flavio Pardo, Mark A. Cappuzzo, Evans Y. Chen, Louis T. Gomez, Fred Klemens, Bob Keller, Cristian Bolle, Larry Buhl, John M. Wyrwas, Ming C. Wu, Robert Peach, Scott Meredith, Charles Middleton, Richard Desalvo

Research output: Contribution to journalArticlepeer-review


We present a reconfigurable optical discriminator filter for frequency modulated microwave-photonics link applications. The filter is based on a simplified ring-assisted Mach-Zehnder interferometer configuration. It enables conversion of a highly linear frequency to amplitude modulation. Operations in a fixed bandwidth (BW) of 30 GHz and a tunable bandwidth from 10 to 30 GHz are achieved using third- and fifth-order filters. A balanced frequency discrimination architecture with electronically reconfigurable transfer characteristics is demonstrated. We measured a ∼ 7.8 dB output-third order intercept point (OIP3) linearity improvement over that of a dual-output Mach-Zehnder.

Original languageEnglish (US)
Article number6296689
Pages (from-to)1856-1859
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number20
StatePublished - 2012


  • Bandpass filter
  • high-index-contrast waveguide
  • microwave photonics
  • optical communications
  • routing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Reconfigurable linear optical FM discriminator'. Together they form a unique fingerprint.

Cite this