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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 12 — Jun. 15, 2010
  • pp: 2022–2024

Microwave signal extraction from femtosecond mode-locked lasers with attosecond relative timing drift

Jungwon Kim and Franz X. Kärtner  »View Author Affiliations

Optics Letters, Vol. 35, Issue 12, pp. 2022-2024 (2010)

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We present a feedback-control method for suppression of excess phase noise in the optical-to-electronic conversion process involved in the extraction of microwave signals from femtosecond mode-locked lasers. A delay-locked loop based on drift-free phase detection with a differentially biased Sagnac loop is employed to eliminate low-frequency (e.g., < 1 kHz ) excess phase noise and drift in the regenerated microwave signals. A 10 GHz microwave signal is extracted from a 200 MHz repetition rate mode-locked laser with a relative rms timing jitter of 2.4 fs (integrated from 1 mHz to 1 MHz ) and a relative rms timing drift of 0.84 fs (integrated over 8 h with 1 Hz bandwidth) between the optical pulse train and the extracted microwave signal.

© 2010 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(140.4050) Lasers and laser optics : Mode-locked lasers
(320.7160) Ultrafast optics : Ultrafast technology
(350.4010) Other areas of optics : Microwaves
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: February 23, 2010
Revised Manuscript: April 27, 2010
Manuscript Accepted: May 13, 2010
Published: June 9, 2010

Jungwon Kim and Franz X. Kärtner, "Microwave signal extraction from femtosecond mode-locked lasers with attosecond relative timing drift," Opt. Lett. 35, 2022-2024 (2010)

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