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Optics Letters


  • Vol. 28, Iss. 15 — Aug. 1, 2003
  • pp: 1377–1379

Optical phase locking among femtosecond subharmonic pulses

Yohei Kobayashi, Hideyuki Takada, Masayuki Kakehata, and Kenji Torizuka  »View Author Affiliations

Optics Letters, Vol. 28, Issue 15, pp. 1377-1379 (2003)

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We stabilized the relative carrier-envelope phase slip among the pump pulse and its subharmonic signal and idler pulses in a femtosecond optical parametric oscillator, resulting in long-term phase coherence among the pulses. The stabilized beat signal corresponding to the relative carrier-envelope phase slip among subharmonic pulses had an accumulated phase error of 0.24 rad in the 1-mHz–1-MHz region. The fluctuation of the beat frequency measured by a 1-s-averaged counter was less than 1 mHz in a 1480-s measurement.

© 2003 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(320.7090) Ultrafast optics : Ultrafast lasers

Yohei Kobayashi, Hideyuki Takada, Masayuki Kakehata, and Kenji Torizuka, "Optical phase locking among femtosecond subharmonic pulses," Opt. Lett. 28, 1377-1379 (2003)

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