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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 22 — Nov. 15, 2008
  • pp: 2674–2676

Time-warp correction and calibration in photonic time-stretch analog-to-digital converter

Shalabh Gupta and Bahram Jalali  »View Author Affiliations

Optics Letters, Vol. 33, Issue 22, pp. 2674-2676 (2008)

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We show how time warps caused by nonuniform wavelength-to-time mapping in the photonic time-stretch analog-to-digital converter (ADC) can be digitally measured and removed. This is combined with digital correction of wavelength-dependent Mach–Zehnder modulator (MZM) bias offset to attain a 10 GHz bandwidth digitizer with > 7 effective bits of resolution and 52 dB spur-free dynamic range. To the best of our knowledge, this is the highest resolution ADC in 10 GHz bandwidth range, with at least 1 order of magnitude higher signal-to-noise ratio than ever achieved. We also demonstrate concatenation of 30 wavelength interleaved time segments with high fidelity on the path to achieving continuous time operation.

© 2008 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 9, 2008
Manuscript Accepted: October 3, 2008
Published: November 14, 2008

Shalabh Gupta and Bahram Jalali, "Time-warp correction and calibration in photonic time-stretch analog-to-digital converter," Opt. Lett. 33, 2674-2676 (2008)

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