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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 12273–12282

A photonic analog-to-digital converter using phase modulation and self-coherent detection with spatial oversampling

Ori Golani, Luca Mauri, Fabiano Pasinato, Cristian Cattaneo, Guido Consonnni, Stefano Balsamo, and Dan M. Marom  »View Author Affiliations


Optics Express, Vol. 22, Issue 10, pp. 12273-12282 (2014)
http://dx.doi.org/10.1364/OE.22.012273


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Abstract

We propose a new type of photonic analog-to-digital converter (ADC), designed for high-resolution (>7 bit) and high sampling rates (scalable to tens of GS/s). It is based on encoding the input analog voltage signal onto the phase of an optical pulse stream originating from a mode-locked laser, and uses spatial oversampling as a means to improve the conversion resolution. This paper describes the concept of spatial oversampling and draws its similarities to the commonly used temporal oversampling. The design and fabrication of a LiNbO3/silica hybrid photonic integrated circuit for implementing the spatial oversampling is shown, and its abilities are demonstrated experimentally by digitizing gigahertz signals (frequencies up to 18GHz) at an undersampled rate of 2.56GS/s with a conversion resolution of up to 7.6 effective bits. Oversampling factors of 1-4 are demonstrated.

© 2014 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(060.5625) Fiber optics and optical communications : Radio frequency photonics
(320.7085) Ultrafast optics : Ultrafast information processing

ToC Category:
Optoelectronics

History
Original Manuscript: March 17, 2014
Revised Manuscript: April 30, 2014
Manuscript Accepted: April 30, 2014
Published: May 13, 2014

Citation
Ori Golani, Luca Mauri, Fabiano Pasinato, Cristian Cattaneo, Guido Consonnni, Stefano Balsamo, and Dan M. Marom, "A photonic analog-to-digital converter using phase modulation and self-coherent detection with spatial oversampling," Opt. Express 22, 12273-12282 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-10-12273


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