Distributed Feedback Lasers for Diode Laser Gas Sensing

  • Pam York
  • Ray Martinelli
  • Ray Menna
  • Dave Cooper
  • Harris Riris
  • Clint Carlise

Abstract

Cryogenic lead-salt (II–VI) diode laser spectroscopy and other infrared techniques such as fourier transform and nondispersive infrared spectroscopy have been used to sense trace gases1. However, there are several limitations, including high cost (>$50K) and lack of portability. Consequently, usage is limited primarily to laboratories or industries forced to comply with federal regulations. The application of room temperature diode lasers to gas sensing allows for a ~10-100x cost reduction, low power consumption, portability, partper-billion detection sensitivity, remote sensing, real-time and interference-free sensors. Such features allow access to applications which require a small and inexpensive, yet highly sensitive gas detection system. Examples include exhaust monitors in automobiles, in situ industrial stack pollution monitors, semiconductor process control, natural gas leak detection in homes, and poisonous gas detection on the battle field and in manufacturing facilities. Important medical applications include glucose monitoring and the ex situ diagnosis of internal disorders by monitoring trace gases on human breath2,3.

Keywords

GaAs Acoustics Alan GaSb 

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Pam York
    • 1
  • Ray Martinelli
    • 1
  • Ray Menna
    • 1
  • Dave Cooper
    • 2
  • Harris Riris
    • 2
  • Clint Carlise
    • 2
  1. 1.David Sarnoff Research CenterPrincetonUSA
  2. 2.SRI InternationalMenlo ParkUSA

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