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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 24 — Dec. 15, 2006
  • pp: 3659–3661

Balanced optical–microwave phase detectors for optoelectronic phase-locked loops

J. Kim, F. X. Kärtner, and F. Ludwig  »View Author Affiliations

Optics Letters, Vol. 31, Issue 24, pp. 3659-3661 (2006)

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A balanced optical–microwave phase detector for the extraction of low-jitter, high-power, and drift-free microwave signals from optical pulse trains is presented. The phase detection is based on electro-optic sampling with a differentially biased Sagnac loop. Because the timing information is transferred in the optical domain, the regenerated microwave signal is robust against drifts and photodetector nonlinearities. In a first experimental implementation, 3 fs in-loop relative timing jitter (integrated from 1 Hz to 10 MHz ) between a 44 MHz optical pulse train and a 10.225 GHz microwave signal is demonstrated.

© 2006 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(320.7160) Ultrafast optics : Ultrafast technology
(350.4010) Other areas of optics : Microwaves

ToC Category:
Ultrafast Optics

Original Manuscript: June 26, 2006
Revised Manuscript: September 13, 2006
Manuscript Accepted: September 19, 2006
Published: November 22, 2006

J. Kim, F. X. Kärtner, and F. Ludwig, "Balanced optical-microwave phase detectors for optoelectronic phase-locked loops," Opt. Lett. 31, 3659-3661 (2006)

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