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Optics Letters

Optics Letters


  • Vol. 36, Iss. 18 — Sep. 15, 2011
  • pp: 3557–3559

Photonic temporal integration of broadband intensity waveforms over long operation time windows

Mohammad H. Asghari, Yongwoo Park, and José Azaña  »View Author Affiliations

Optics Letters, Vol. 36, Issue 18, pp. 3557-3559 (2011)

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We propose and experimentally demonstrate a novel design for temporal integration of microwave and optical intensity waveforms with combined high processing speed and a long operation time window. It is based on concatenating in series a discrete-time (low-speed) photonic integrator and a high-speed analog time-limited intensity integrator. This scheme is demonstrated here using a cascaded fiber-based interferometers’ system (as a passive eight-point discrete-time integrator) and an analog time-limited intensity integrator. The latter is based on temporal intensity modulation of the input waveform with a rectangular-like incoherent energy spectrum followed by linear dispersion. Using this setup, we experimentally achieve accurate time integration of intensity signals with 36 GHz bandwidths over an operation time window of 4 ns , corresponding to a processing time- bandwidth product of > 144 .

© 2011 Optical Society of America

OCIS Codes
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(200.4740) Optics in computing : Optical processing
(060.5625) Fiber optics and optical communications : Radio frequency photonics
(320.7085) Ultrafast optics : Ultrafast information processing

ToC Category:
Fourier Optics and Signal Processing

Original Manuscript: June 7, 2011
Revised Manuscript: August 12, 2011
Manuscript Accepted: August 14, 2011
Published: September 8, 2011

Mohammad H. Asghari, Yongwoo Park, and José Azaña, "Photonic temporal integration of broadband intensity waveforms over long operation time windows," Opt. Lett. 36, 3557-3559 (2011)

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