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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 18 — Jun. 20, 2006
  • pp: 4310–4318

Analysis of the resolution–bandwidth–noise trade-off in wavelength-based photonic analog-to-digital converters

Johan Stigwall and Sheila Galt  »View Author Affiliations

Applied Optics, Vol. 45, Issue 18, pp. 4310-4318 (2006)

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The performance of wavelength-based photonic analog-to-digital converters (ADCs) is theoretically analyzed in terms of resolution and bandwidth as well as of noise tolerance. The analysis applies to any photonic ADC in which the analog input signal is converted into the wavelength of an optical carrier, but special emphasis is put on the spectrometerlike setup in which the wavelength is mapped to a spatial spot position. The binary output signals are then retrieved by an array of fan-out diffractive optical elements that redirect the beam onto the correct detectors. In particular, the case when the input signal controls the wavelength directly such that it will chirp in frequency during each sampling pulse or interval is studied. This chirping obviously broadens the spot on the diffractive optical element array; the effect of this broadening on noise tolerance and comparator accuracy is analytically analyzed, and accurate numerical calculations of the probability of error are presented.

© 2006 Optical Society of America

OCIS Codes
(050.1590) Diffraction and gratings : Chirping
(050.1970) Diffraction and gratings : Diffractive optics
(070.4560) Fourier optics and signal processing : Data processing by optical means
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation

ToC Category:
Diffraction and Gratings

Original Manuscript: June 13, 2005
Revised Manuscript: December 12, 2005
Manuscript Accepted: December 16, 2005

Johan Stigwall and Sheila Galt, "Analysis of the resolution-bandwidth-noise trade-off in wavelength-based photonic analog-to-digital converters," Appl. Opt. 45, 4310-4318 (2006)

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