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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1988),
  • paper WT5

Frequency-modulation spectroscopy with buried-heterostructure lead-salt diode lasers

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Abstract

Frequency modulation (FM) spectroscopy1 with injection modulated lead-salt diode lasers promises quantum-noise-limited detection of numerous molecular species in the mid-IR spectral region. Recent experimental work with mesa-stripe geometry lead-salt lasers has focused on a comparison of single-tone and two-tone methods of implementing the technique.2 Absorption sensitivities of 10-5 have been achieved using the two-tone method, a result primarily limited by the relative low (<100-μW) single-mode output power and high incidental amplitude modulation (AM) of the mesa-stripe lasers.

© 1988 Optical Society of America

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