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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 12 — Jun. 15, 2011
  • pp: 2188–2190

Modulation-free optical locking of an external-cavity diode laser to a filter cavity

Kazuhiro Hayasaka  »View Author Affiliations


Optics Letters, Vol. 36, Issue 12, pp. 2188-2190 (2011)
http://dx.doi.org/10.1364/OL.36.002188


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Abstract

Optical locking to a filter cavity is an effective method to eliminate the limitations of an external-cavity diode laser, such as broad spontaneous emission backgrounds and frequency jitters. Stable operation of the optical locking requires simultaneous control of the feedback phase and the diode-laser frequency. Frequency dither is usually used to extract the two error signals, but this causes extra frequency modulation in the output beam. A modulation-free method for deriving the error signals by modulating the laser-cavity coupling strength is demonstrated with a violet diode laser. A modulation-free linewidth upper limit of about 7 kHz for a 1 s measurement is realized by the method.

© 2011 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 31, 2011
Revised Manuscript: May 3, 2011
Manuscript Accepted: May 4, 2011
Published: June 6, 2011

Citation
Kazuhiro Hayasaka, "Modulation-free optical locking of an external-cavity diode laser to a filter cavity," Opt. Lett. 36, 2188-2190 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-12-2188

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