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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 21618–21627

Coherent time-stretch transformation for real-time capture of wideband signals

Brandon W. Buckley, Asad M. Madni, and Bahram Jalali  »View Author Affiliations


Optics Express, Vol. 21, Issue 18, pp. 21618-21627 (2013)
http://dx.doi.org/10.1364/OE.21.021618


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Abstract

Time stretch transformation of wideband waveforms boosts the performance of analog-to-digital converters and digital signal processors by slowing down analog electrical signals before digitization. The transform is based on dispersive Fourier transformation implemented in the optical domain. A coherent receiver would be ideal for capturing the time-stretched optical signal. Coherent receivers offer improved sensitivity, allow for digital cancellation of dispersion-induced impairments and optical nonlinearities, and enable decoding of phase-modulated optical data formats. Because time-stretch uses a chirped broadband (>1 THz) optical carrier, a new coherent detection technique is required. In this paper, we introduce and demonstrate coherent time stretch transformation; a technique that combines dispersive Fourier transform with optically broadband coherent detection.

© 2013 OSA

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2310) Fiber optics and optical communications : Fiber optics
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(140.4050) Lasers and laser optics : Mode-locked lasers
(260.2030) Physical optics : Dispersion
(320.1590) Ultrafast optics : Chirping

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 17, 2013
Revised Manuscript: August 28, 2013
Manuscript Accepted: August 29, 2013
Published: September 6, 2013

Citation
Brandon W. Buckley, Asad M. Madni, and Bahram Jalali, "Coherent time-stretch transformation for real-time capture of wideband signals," Opt. Express 21, 21618-21627 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-21618


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