Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis
Patent
1997-06-19
2000-03-28
Peeso, Thomas R.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Chemical analysis
356301, B23K 2600
Patent
active
060443294
ABSTRACT:
A method of operating a laser and a gas analyzer to reduce low frequency and high frequency power non-linearity errors passes a laser beam through a sample gas to a detector. Intensity measurements are taken and compared to a reference set of measurements. The reference set of measurements can be calculated by measuring pressure and temperature of the sample gas. The laser wave number tuning width is locked to tune a high frequency of an absorption path fringe to a predetermined reference value. The analyzer can be operated without taking a reference set of measurements and the analyzer is much smaller than previous analyzers.
REFERENCES:
patent: 5149983 (1992-09-01), Kaiblinger
patent: 5159411 (1992-10-01), Hammerich et al.
patent: 5173749 (1992-12-01), Tell et al.
patent: 5267019 (1993-11-01), Whittaker et al.
patent: 5301014 (1994-04-01), Koch
patent: 5331409 (1994-07-01), Thurtell et al.
patent: 5464983 (1995-11-01), Wang
patent: 5506685 (1996-04-01), Grasdepot
patent: 5513006 (1996-04-01), Schulz et al.
patent: 5550636 (1996-08-01), Hagans et al.
patent: 5807750 (1998-09-01), Baum et al.
patent: 5818579 (1998-10-01), Beck et al.
Bomse, D.S., et al., Frequency modulation and wavelength modulation spectroscopies: comparison of experimental methods using a lead-salt diode laser. Applied Optics, 31, 718-731, 1992.
Carlisle, C.B. et al., Quantum noise-limited FM spectroscopy with a lead-salt diode laser. Applied Optics, 28, 2567-2576, 1989.
Cassidy, D.T., et al., Atmospheric pressure monitoring of trace gases using turnable diode lasers. Applied Optics, 21, 1185-1190, 1982.
Cassidy, D.T., et al., High-sensitivity detection of trace gases using sweep integration and tunable diode laser. Applied Optics, 21, 2527-2530, 1982.
Kidd, G.E., et al., Noise Analysis and Minamization Techniques for Concentration Gradient Measurement Using the U of Guelph Tunable Diode Laser Trace Gas Analyser. (Poster presented at Fraunhofer Institute, Freiburg, Germany, Oct. 19, 1994).
Reid, J., et al., Linewidth measurements of tunable diode lasers using heterodyne and etalon techniques. Applied Optics, 21, 3961-3965, 1982.
Reid, J., et al., Sensitivity limits of a tunable diode laser spectrometer, with application to the detection of NO.sub.2 at the 100-ppt level. Applied Optics, 19, 3349-3354, 1980.
Reid, J., et al., Detection of sulphur dioxide at, and below, the part per billion level using a tunable diode laser. Optical and Quantum Electronics, 11, 385-391, 1979.
Reid, J., et al., Second-Harmonic Detection with Tunable Diode Lasers -- Comparison of Experiment and Theory. Applied Physics, 26, 203-210, 1981.
Reid, J., et al., High sensitivity pollution detection employing tunable diode lasers. Applied Optics, 17, 300-307, 1978.
Silver, J.A., Frequency-modulation spectroscopy for trace species detection: theory and comparison among experimental methods. Applied Optics, 31, 707-717, 1992.
Werle, P., Spectroscopic trace gas analysis using semiconductor diode lasers. Spectrochimica Acta, 52, 805-822, 1996.
KWare Software Systems Inc.
Peeso Thomas R.
LandOfFree
Laser gas analyzer and a method of operating the laser to reduce does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser gas analyzer and a method of operating the laser to reduce, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser gas analyzer and a method of operating the laser to reduce will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1334584