Backscatter absorption gas imaging systems and light sources...

Coherent light generators – Particular pumping means – Pumping with optical or radiant energy

Reexamination Certificate

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C372S020000, C372S022000, C372S006000

Reexamination Certificate

active

07151787

ABSTRACT:
The location of gases that are not visible to the unaided human eye can be determined using tuned light sources that spectroscopically probe the gases and cameras that can provide images corresponding to the absorption of the gases. The present invention is a light source for a backscatter absorption gas imaging (BAGI) system, and a light source incorporating the light source, that can be used to remotely detect and produce images of “invisible” gases. The inventive light source has a light producing element, an optical amplifier, and an optical parametric oscillator to generate wavelength tunable light in the IR. By using a multi-mode light source and an amplifier that operates using 915 nm pump sources, the power consumption of the light source is reduced to a level that can be operated by batteries for long periods of time. In addition, the light source is tunable over the absorption bands of many hydrocarbons, making it useful for detecting hazardous gases.

REFERENCES:
patent: 3609398 (1971-09-01), Bjorkholm
patent: 3628186 (1971-12-01), Rumson et al.
patent: 3948345 (1976-04-01), Rosencwaig
patent: 4555627 (1985-11-01), McRae, Jr.
patent: 4622845 (1986-11-01), Ryan et al.
patent: 4745276 (1988-05-01), Broicher et al.
patent: 5097477 (1992-03-01), Scheps
patent: 5117126 (1992-05-01), Geiger
patent: 5202560 (1993-04-01), Kock et al.
patent: 5430293 (1995-07-01), Sato et al.
patent: 5434700 (1995-07-01), Yoo
patent: 5656813 (1997-08-01), Moore et al.
patent: 5864644 (1999-01-01), DiGiovanni et al.
patent: 6157033 (2000-12-01), Chudnovsky
patent: 6229828 (2001-05-01), Sanders et al.
patent: H1965 (2001-06-01), Burns et al.
patent: 6304237 (2001-10-01), Karakawa
patent: 6324326 (2001-11-01), Dejneka et al.
patent: 6344647 (2002-02-01), Jourdain et al.
patent: 6359914 (2002-03-01), Powers et al.
patent: 6455854 (2002-09-01), Richman
patent: 6751010 (2004-06-01), Richter
patent: 6757096 (2004-06-01), Schiller
patent: 6813429 (2004-11-01), Price et al.
patent: 2003/0081192 (2003-05-01), Nishi
patent: 2004/0006276 (2004-01-01), Demos et al.
patent: 2004/0036957 (2004-02-01), Galvanauskas et al.
patent: 0 857 997 (2001-10-01), None
patent: WO 98/01927 (1998-01-01), None
patent: WO 02/27297 (2002-04-01), None
Goers et al., Development of a compact gas imaging sensor employing a cw fiber-amp pumped PPLN OPO technical paper during CLEO 2001 sent in by IDS on Oct. 20, 2003.
Goers et al. (Development of a compact gas imaging sensor employing a cw fiber-amp-pumped PPLN OPO Technical Paper in CLEO 2001).
Optics Letters, vol. 21, No. 17; Bosenberg, et al., “93% pump depletion, 3.5-W continuous-wave, singly resonant optical parametric oscillator,” pp. 1336-1338, Sep. 1, 1996.
Springer-Verlag; Applied Physics B, Lasers and Optics; D.G. Lancaster, et al.; “Portable fiber-coupled diode-laser-based sensor for multiple trace gas detection;” pp. 459-465; Rice University, Houston, TX., Jun. 24, 1999.
CLEO 2001 Conference; Goers, et al., “Development of a compact gas imaging sensor employing a cw fiber-amp-pumped PPLN OPO,” Baltimore, MD, May 6-11, 2001.
M. J. T. Milton and P. T. Woods, “Pulse averaging methods for a laser remote monitoring system using atmospheric backscatter,” Applied Optics, 26, No. 13, 2598 (1987).
N. Menyuk, D. K. Killinger, and C. R. Menyuk, “Limitations of signal averaging due to temporal correlation in laser remote-sensing measurements,” Applied Optics, 21, No. 18, 3377 (1982).
T. G. McRae and T. J. Kulp, “Backscatter absorption gas imaging: a new technique for gas visualization,” Applied Optics, 32, No. 21, 4037 (1993).
T. J. Kulp, P. Powers, R. Kennedy, and U. Goers, “Development of a pulsed backscatter-absorption gas-imaging system and its application to the visualization of natural gas leaks,” Applied Optics, 37, No. 18, 3912 (1998).
Gregory David Miller, “Periodically Poled Lithium Niobate: Modeling, Fabrication, and Nonlinear-Optical Performance”, Ph.D. Dissertation, Stanford University, Jul. 1998.
L. Goldberg, J. Koplow, D. G. Lancaster, R. F. Curl, and F. K. Tittel, “Mid-infrared difference-frequency generation source pumped by a 1.1-1.5 μm dual-wavelength fiber amplifier for trace-gas detection”,Optics Letters,vol. 23, No. 19, Oct. 1, 1998, pp. 1517-1519.
D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, L. Goldberg, and J. Koplow, “High-Power continuous-wave mid-infrared radiation generated by difference frequency mixing of diode-laser-seeded fiber amplifiers and its application to dual-beam spectroscopy”,Optics Letters,vol. 24, No. 23, Dec. 1, 1999, pp. 1744-1746.
H. Dahnke, D. Kleine, P. Hering, and M. Mürtz, “Real-time monitoring of ethane in human breath using mid-infrared cavity leak-out spectroscopy”,Appl. Phys. B 72,May 9, 2001, pp. 971-975.
Naoya Matsuoka, Shigeru Yamaguchi, Kenzo Nanri, Tomoo Fujioka, Dirk Richter and Frank K. Tittel, “Yb Fiber Laser Pumped Mid-IR Source Based on Difference Frequency Generation and Its Application to Ammonia Detection”,Jpn. J. Appl. Phys.,vol. 40, Part 1, No. 2A, Feb. 2001, pp. 625-628.
Uta-Barbara Goers, Karla Armstrong, Ricky Sommers, Thomas J. Kulp, Dahv A.V. Kliner, Sal Birtola, Lew Goldberg, Jeffrey P. Koplow, and T.G. McRae, “Development of a compact gas imaging sensor employing a cw fiber-amp-pumped PPLN OPO”, Presentation at CLEO, Apr. 2001.
Scott E. Bisson, Karla A. Armstrong, Thomas J. Kulp, and Matthew Hartings, “Broadly tunable, mode-hop-tuned cw optical parametric oscillator based on periodically poled lithium niobate”,Applied Optics,vol. 40, No. 33, Nov. 20, 2001, pp. 6049-6055.
CDRL Report No. A009, “Commercialization of Technologies to Lower Defense Costs, Draft Laser-Based Sensors for VOCs, Technology Assessment”, 19 pages, Mar. 22, 2002.
“Construction of CW Optical Parametric Oscillators”, http//www.nat.vu.nl/vakgroepen/atom/english/research/appspec/opos.html, Aug. 15, 2002.
SERDP Fact Sheet, “Sensors for VOC/NOx and Metal Particulate Emissions Monitoring”, Mar. 25, 1999.

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