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Review of Scientific Instruments / Volume 79 / Issue 10 / OPTICS; ATOMS AND MOLECULES; SPECTROSCOPY; PHOTON DETECTORS

Rev. Sci. Instrum. 79, 103110 (2008); http://dx.doi.org/10.1063/1.3006386 (6 pages)

A frequency stabilization technique for diode lasers based on frequency-shifted beams from an acousto-optic modulator

Mevan Gunawardena, Paul W. Hess, Jared Strait, and P. K. Majumder

Physics Department, Williams College, Williamstown, Massachusetts 01267, USA

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(Received 2 September 2008; accepted 6 October 2008; published online 30 October 2008)

We present a simple method for diode laser frequency stabilization that makes use of a Doppler-broadened vapor cell absorption signals of two frequency-shifted laser beams. Using second-order-diffracted, double-passed beams from an acousto-optic modulator, we achieve a frequency separation roughly equal to the Doppler half width. The differential transmission signals of the two beams provide an error signal with a very large linear feature, allowing frequency stabilization over a range of greater than 1 GHz by means of standard proportional-integral-derivative servo feedback to the piezoelectric control of the grating in our external cavity diode laser. We have applied this technique to two different diode laser systems, one used to lock to the 410 nm E1 transition in indium and another for locking to the M1/E2 transition in thallium at 1283 nm. In both cases the technique reduces frequency fluctuation to roughly 1 MHz over time scales from 10−3 to 102 s.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. THE DIFFERENTIAL LINESHAPE
  3. EXPERIMENTAL DETAILS
  4. SIGNAL CALIBRATION AND LOCKING SENSITIVITY
  5. POTENTIAL SYSTEMATIC ERRORS AND ACCURACY LIMITATIONS
  6. APPLICATION OF METHOD TO NON-ELECTRIC-DIPOLE TRANSITION IN THALLIUM
  7. CONCLUSION

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KEYWORDS and PACS

Keywords

acousto-optical modulation, laser frequency stability, piezoelectric devices, semiconductor lasers, three-term control

PACS

  • 42.60.Da

    Resonators, cavities, amplifiers, arrays, and rings

  • 42.60.By

    Design of specific laser systems

  • 42.79.Jq

    Acousto-optical devices

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3006386

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    J. A. Kerckhoff, C. D. Bruzewicz, R. Uhl, and P. K. Majumder, Rev. Sci. Instrum. 76, 093108 (2005)RSINAK000076000009093108000001.


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