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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 5 — Mar. 1, 2012
  • pp: 918–920

5μm laser source for frequency metrology based on difference frequency generation

Ulf Bressel, Ingo Ernsting, and Stephan Schiller  »View Author Affiliations

Optics Letters, Vol. 37, Issue 5, pp. 918-920 (2012)

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A narrow-linewidth cw 5μm source based on difference frequency generation of a 1.3μm quantum dot external cavity diode laser and a cw Nd:YAG laser in periodically poled MgO:LiNbO3 has been developed and evaluated for spectroscopic applications. The source can be tuned to any frequency in the 5.095.13μm range with an output power up to 0.1mW, and in the 5.425.48μm range with sub-microwatt output. The output frequency is stabilized and its value determined by measuring the frequency of the two lasers with a remotely located frequency comb. A frequency instability of less than 4kHz for long integration times and a linewidth smaller than 700kHz were obtained.

© 2012 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4400) Nonlinear optics : Nonlinear optics, materials
(300.6350) Spectroscopy : Spectroscopy, ionization

ToC Category:
Nonlinear Optics

Original Manuscript: November 22, 2011
Revised Manuscript: January 12, 2012
Manuscript Accepted: January 18, 2012
Published: February 28, 2012

Ulf Bressel, Ingo Ernsting, and Stephan Schiller, "5 μm laser source for frequency metrology based on difference frequency generation," Opt. Lett. 37, 918-920 (2012)

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