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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 11, Iss. 10 — Oct. 1, 1986
  • pp: 606–608

Two-tone optical heterodyne spectroscopy with a tunable lead-salt diode laser

David E. Cooper and J. P. Watjen  »View Author Affiliations


Optics Letters, Vol. 11, Issue 10, pp. 606-608 (1986)
http://dx.doi.org/10.1364/OL.11.000606


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Abstract

We report the demonstration of two-tone optical heterodyne spectroscopy with a tunable lead-salt diode laser. Using high-frequency modulation of the diode-laser injection current, we demonstrated a detection-sensitivity limit of 1 × 10−5 to differential absorption from Doppler-broadened NH3 lines in the 930-cm−1 region. In our experiment, this limit was set by preamplifier noise and the low quantum efficiency of the photodetector. A substantial increase in sensitivity should be possible by using an improved detector, an improved preamplifier, and higher optical power.

© 1986 Optical Society of America

History
Original Manuscript: March 17, 1986
Manuscript Accepted: July 3, 1986
Published: October 1, 1986

Citation
David E. Cooper and J. P. Watjen, "Two-tone optical heterodyne spectroscopy with a tunable lead-salt diode laser," Opt. Lett. 11, 606-608 (1986)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-11-10-606

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