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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 2 — Jan. 10, 2009
  • pp: 429–435

Formulation of frequency stability limited by laser intrinsic noise in feedback systems

Teruhito Hori, Akito Araya, Shigenori Moriwaki, and Norikatsu Mio  »View Author Affiliations


Applied Optics, Vol. 48, Issue 2, pp. 429-435 (2009)
http://dx.doi.org/10.1364/AO.48.000429


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Abstract

We investigated the influence of amplitude modulation (AM) noise and phase modulation (PM) noise of a laser source on the frequency stability in frequency stabilization systems. We estimated the frequency stability and evaluated the efficacy of a noise reduction technique (the Doppler-trend subtraction method) of a laser diode frequency stabilization system, where enhanced intensity noise arising from PM-to-AM noise conversion through a reference gas cell is reduced using the technique employed in modulation transfer spectroscopy. To evaluate the relationship between the laser’s intrinsic noise and its frequency stability, we performed noise spectrum measurements and formulated frequency stability in addition to measuring Allan standard deviation. As a result, it is found that the extra noise generated in PM-to-AM conversion is efficiently removed by the Doppler-trend subtraction method and that within the feedback bandwidth, the frequency stability becomes 1 order of magnitude better than that without the method.

© 2009 Optical Society of America

OCIS Codes
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6460) Spectroscopy : Spectroscopy, saturation
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 3, 2008
Manuscript Accepted: November 30, 2008
Published: January 9, 2009

Citation
Teruhito Hori, Akito Araya, Shigenori Moriwaki, and Norikatsu Mio, "Formulation of frequency stability limited by laser intrinsic noise in feedback systems," Appl. Opt. 48, 429-435 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-2-429

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