Reconfigurable generation of high-order ultra-wideband waveforms using edge detection

Avi Zadok, Xiaoxia Wu, Jacob Sendowski, Amnon Yariv, Alan E. Willner

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The generation of ultra-wideband (UWB), high-frequency waveforms based on nonlinear propagation of pulses in optical fibers is reported. Self-phase modulation and subsequent optical filtering are used to implement all-optical edge detectors, which generate two temporally-narrowed replicas of each input pulse. The shapes of the narrowed pulses are subtracted from that of the original one in a balanced differential detector, providing a UWB waveform. The use of multiple replicas and nonlinear propagation allows for the generation of higher-order pulse shapes, beyond those of a Gaussian monocycle or doublet. The output pulse shape is reconfigurable through adjusting the input power and detuning the optical filters. The central radio-frequency of the generated waveforms is as high as 34 GHz, with a fractional bandwidth of 70%.

Original languageEnglish
Article number5415533
Pages (from-to)2207-2212
Number of pages6
JournalJournal of Lightwave Technology
Issue number16
StatePublished - 2010

Bibliographical note

Funding Information:
Manuscript received November 01, 2009; revised January 13, 2010, February 01, 2010; accepted February 02, 2010. Date of publication February 17, 2010; date of current version July 26, 2010. This work was supported in part by the National Science Foundation (NSF) ERC CIAN. The work of A. Zadok was supported in part by a post-doctoral fellowship from the Center for the Physics of Information (CPI), California Institute of Technology.


  • Microwave photonics
  • nonlinear fiber-optics
  • optical signal processing
  • ultra-wideband pulse generation


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