Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2005-01-31
2008-08-05
Hughes, Deandra M. (Department: 3663)
Optical waveguides
Optical waveguide sensor
C356S437000
Reexamination Certificate
active
07409117
ABSTRACT:
A gas species monitoring system includes a laser, a fiber amplifier configured to receive an input signal from the laser and generate an amplified signal, and a variable optical attenuation system configured to receive at least a portion of the amplified signal and generate an attenuated signal for delivery to a measurement point, where the measurement point includes a gaseous fluid. The system further includes a detector configured to receive and process a signal from the measurement point so as to obtain a measured signal that correlates with the presence of a gas species within the gaseous fluid at the measurement point, and a processor in communication with at least the variable optical attenuation system and the detector. The processor controls the variable optical attenuation system based upon the measured signal.
REFERENCES:
patent: 5134276 (1992-07-01), Hobbs
patent: 5185643 (1993-02-01), Vry et al.
patent: 5252060 (1993-10-01), McKinnon et al.
patent: 5252834 (1993-10-01), Lin
patent: 5293213 (1994-03-01), Klein et al.
patent: 5301014 (1994-04-01), Koch
patent: 5448071 (1995-09-01), McCaul et al.
patent: 5636035 (1997-06-01), Whittaker et al.
patent: 5748325 (1998-05-01), Tulip
patent: 5813767 (1998-09-01), Calabro' et al.
patent: 6069697 (2000-05-01), Tanimoto et al.
patent: 6252689 (2001-06-01), Sharp
patent: 7157712 (2007-01-01), Flanders et al.
patent: 7244936 (2007-07-01), Von Drasek
patent: 7248755 (2007-07-01), Sappey et al.
patent: 7274028 (2007-09-01), Fishkin et al.
patent: 2002/0031737 (2002-03-01), Von Drasek et al.
patent: 2002/0185240 (2002-12-01), Drake, Jr.
patent: 2003/0132389 (2003-07-01), Von Drasek et al.
patent: 2003/0152307 (2003-08-01), Von Drasek et al.
patent: 2003/0160174 (2003-08-01), Grant et al.
patent: 2003/0218752 (2003-11-01), Von Drasek et al.
patent: 2005/0254056 (2005-11-01), Kachanov et al.
patent: 2006/0065834 (2006-03-01), Flanders et al.
patent: 2006/0133714 (2006-06-01), Sappey et al.
Richter, Dirk, Lancaster, David, G., and Tittel, Frank, K., Development of an Automated Diode-laser-based Multicomponent Gas Sensor, Applied Optics, vol. 39, No. 24, Aug. 2000.
Ray, G. J., Anderson, T. N., Lucht, R. P., Walther, T., and Caton, J. A., Fiber-Amplified, Diode-Laser-Based Sensor for OH Absorption, Paper No. 268, Second Joint Meeting of the U.S. Sections of the Combustion Institute, Oakland, CA, Mar. 25-28, 2001.
Weber, Micheal, E., Pushkarsky, Michael, B., and Patel, Kumar, N., Ultra-Sensitive Gas Detection Using Diode Lasers and Resonant Photoacoustic Spectroscopy, SPIE's International Symposium and Technology, Diode Lasers and Applications, Paper No. 4871-11, Jul. 2002.
Sonnenfroh, D., Sewell, S., and Allen, M., “An Ultrasensitive Detection Techniques for Tunable Diode laser Spectrometers: Application to Detection of NO2and H2O”, Proceedings of the Society of Photo-optical Instrumentation Engineers, vol. 2834, pp. 60-66, 1996.
W. Von Drasek, K. Mulderink, S. Wehe, and M. Allen Multiple Gas Species Detection using a Tunable Diode Laser Sensor for Combustion Process Monitoring American Institute of Chemical Engineers 2002 Annual Meeting, Sensors for Process Control and for the Chemical Industry I, Indianapolis, IN, Nov. 3-8, 2002.
Dietrich, A., Kaspersen, P., and Sommerauer, H., “Laser Analysis of CO and Oxygen in EAF Off-Gas”, 59thElectric Furnace Conference and 19thProcess Technology Conference Proceedings, Iron and Steel Society, 2001.
Von Drasek, W.; “Tunable Diode Laser Sensor for Monitoring and Control of Harsh Combustion Environments”; Quarterly Progress Report No. 15 (DE-FC36-00CH11030), Chicago Research Center, Jan. 30, 2004; 29 pages.
Allen Mark G.
Von Drasek William A.
Wehe Shawn D.
American Air Liquide Inc.
Diacou Ari M
Haynes Elwood L.
Hughes Deandra M.
Physical Sciences Inc.
LandOfFree
Dynamic laser power control for gas species monitoring does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dynamic laser power control for gas species monitoring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic laser power control for gas species monitoring will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3999879