Optical analog self-interference cancellation using electro-absorption modulators

Matthew P. Chang, Mable Fok, Andrew Hofmaier, Paul R. Prucnal

Research output: Contribution to journalArticlepeer-review

102 Scopus citations


An optical analog self-interference cancellation system for radio-frequency communications is proposed and experimentally demonstrated. The system uses two electro-absorption modulators, an optical attenuator and delay, and a balanced photodetector to subtract strong self-interference from a corrupted received signal and recover a weak signal of interest. The system achieves > 65 dB narrowband cancellation and > 30 dB broadband cancellation across more than 40 MHz bandwidth for interference in both the 900 MHz and 2.4GHz bands. Both narrowband and broadband cancellation are frequency tunable, and can be combined with other forms of interference cancellation to achieve even higher levels of cancellation.

Original languageEnglish (US)
Article number6423220
Pages (from-to)99-101
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number2
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • Electro-absorption modulators (EAMs)
  • microwave photonics
  • self-interference cancellation (SIC)


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