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Mid-IR instrument for analyzing a gaseous sample and method for using the same

  • US 7,606,274 B2
  • Filed: 03/13/2006
  • Issued: 10/20/2009
  • Est. Priority Date: 09/20/2001
  • Status: Expired due to Term
First Claim
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1. An optical nose system having a broadly tunable, narrow linewidth mid-IR laser source wherein the laser source has a modular structure and comprisesa) a tunable seed laser unit including a single-longitudinal mode, widely tunable TM2+:

  • II-VI master oscillator with a TM2+;

    II-VI power amplifier having a laser output, where TM2+ stands for transition metal ion selected from the group consisting of Cr2+, Fe2+, Co2+ and Ni2+, and II-VI stands for ZnS, ZnSe, CdS, CdSe, ZnTe, CdTe and their mixtures wherein said seed laser is a broadly tunable single frequency laser without mode hoping which is comprised of Littrow or Littman dispersive cavity with accompanied by dynamic correction of cavity length;

    b) a pulsed pump laser unit including a single-frequency, high energy, Q-switch laser having a laser output;

    c) an Optical Parametric Generator-Amplifier, pumped by said pulsed pump laser unit and seeded by said seed tunable laser unit having a mid-IR output selectively variable over about 2 to 20 μ

    m; and

    wherein said pulsed pump and seed tunable lasers are pumped by a single diode, diode array, or fiber laser.

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