Improving the power and spectral performance of a 27-33 THz AgGaS2 difference-frequency spectrometer

T. Kaing, Jean Jacques Zondy, A. P. Yelisseyev, S. I. Lobanov, Ludmila I. Isaenko

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Progress toward the achievement of a compact, sub-kilohertz resolution difference-frequency spectrometer to probe narrow saturated molecular transitions in the 9-11 μm range is reported. The spectrometer, presently generating 40 nW of infrared (IR) power [8], uses a type-I cut AgGaS2 crystal located in a dual-cavity resonator design. A frequency-stabilized alldiode-laser setup was implemented to obtain the required mid-IR spectral purity and frequency tuning range. Further experimental investigations show that a type-II phase-matched AgGaS2 crystal or a walkoff-compensated, two-crystal device would yield at least two times larger conversion efficiency than type-I cut samples. These improvements should help to reach the goal of the microwatt-level output for the IR radiation.

Original languageEnglish
Pages (from-to)592-595
Number of pages4
JournalIEEE Transactions on Instrumentation and Measurement
Issue number2
Publication statusPublished - Dec 1 1999
Externally publishedYes


  • Difference-frequency generation
  • Frequency metrology
  • Infrared spectroscopy

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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