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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 8 — Apr. 9, 2012
  • pp: 8219–8227

True time delays using conversion/dispersion with flat magnitude response for wideband analog RF signals

Omer F. Yilmaz, Lior Yaron, Salman Khaleghi, M. Reza Chitgarha, Moshe Tur, and Alan Willner  »View Author Affiliations

Optics Express, Vol. 20, Issue 8, pp. 8219-8227 (2012)

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We demonstrate optical true time delays using wavelength conversion coupled with chromatic dispersion. The transfer function of the delay system is investigated, and it is shown that 3-dB bandwidth of the system can be increased over 40 GHz by using offset pumps. A flat magnitude response (<1 dB peak-peak, 0.2 dB RMS deviation) is achieved in the 1-30 GHz band. Calculated matched filter output to LFM pulses shows good performance, maintaining a > 30 dB peak-to-sidelobe-ratio. The effect of pump depletion during wavelength conversion is also investigated.

© 2012 OSA

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(280.5110) Remote sensing and sensors : Phased-array radar
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Nonlinear Optics

Original Manuscript: March 20, 2012
Revised Manuscript: March 20, 2012
Manuscript Accepted: March 20, 2012
Published: March 26, 2012

Omer F. Yilmaz, Lior Yaron, Salman Khaleghi, M. Reza Chitgarha, Moshe Tur, and Alan Willner, "True time delays using conversion/dispersion with flat magnitude response for wideband analog RF signals," Opt. Express 20, 8219-8227 (2012)

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