Raman Spectroscopy for On-Line Environmental and Atmospheric Analysis Process Instruments Inc., Salt Lake City, UT - PowerPoint PPT Presentation

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Raman Spectroscopy for On-Line Environmental and Atmospheric Analysis Process Instruments Inc., Salt Lake City, UT

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Spectrograph Design: The Raman Specrograph design has reduced both. size and weight of our Raman Spectrograph. In addition, to improving the ... – PowerPoint PPT presentation

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Title: Raman Spectroscopy for On-Line Environmental and Atmospheric Analysis Process Instruments Inc., Salt Lake City, UT


1
Raman Spectroscopy for On-Line Environmental and
Atmospheric AnalysisProcess Instruments Inc.,
Salt Lake City, UT
  • Innovation
  • Process Instruments Inc. has developed a
    full-spectrum Raman scattering
  • instrument, incorporating a multipass external
    cavity enhancement cell for
  • gas phase analysis of Oxygen and Carbon Dioxide.
  • Accomplishments
  • Spectrograph Design The Raman Specrograph
    design has reduced both
  • size and weight of our Raman Spectrograph. In
    addition, to improving the
  • signal collection by redesigning the optics
    placement. This improved design
  • allows for increased signal collection, and
    improved signal resolution
  • while maintaining a smaller foot print.
  • Laser Lifetime and Improved Stability Process
    Instruments Inc. has been able
  • to improve the stability of our
    frequency-stabilized lasers by using a low AR
  • (anti-reflective) coating on the front facet.
    This coating also allows for
  • improved frequency tuning. Found a laser diode
    vendor that can supply Al-
  • free laser diodes. Process Instruments in house
    life testing to date indicates that
  • we can now warrant our lasers for at least
    one year. This is 4 times longer
  • than any other similar laser manufacturers.
  • Commercialization
  • There has been considerable commercial interest
    from private companies to assist in Process
    Instruments Inc. Raman development. An
    arrangement has been structured to sell a basic
    instrument prototype in exchange for a companys
    financing of our materials and development costs.
    Process Instruments Inc. acquired 468,000 in
    funds for basic diode-laser Raman instrumentation
    development.
  • Government/Science Applications
  • A dual wavelength diode laser has been
    developed for use with one of
  • upcoming MARS exploratory missions.The dual
    wavelength laser will allow
  • a single spectrograph to measure the complete
    Raman spectra from 300 cm-1
  • to 4,000 cm-1. A NIR 785 nm laser is used for
    Raman scattering in the region
  • of 300 to 2000 cm-1. Exciting with this
    wavelength reduces fluorescence
  • problems. Exciting with a visible (670 nm)
    wavelength laser for the region of
  • 2000 to 4000 cm-1 takes advantage of improved
    quantum efficiency.

Points of Contact - NASA Jane Fox
281-483-4815 - Company Lee Smith
pismith_at_sisna.com 1996 STTR Phase II
NAS9-98023
Johnson Space Center Date of Update06/26/00 Succes
s Story 09-27
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