Optics: measuring and testing – For light transmission or absorption
Reexamination Certificate
2011-01-04
2011-01-04
Toatley, Gregory J (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
C385S144000, C250S227140
Reexamination Certificate
active
07864321
ABSTRACT:
There is provided an evanescent wave multimode optical waveguide sensitive to a chemical species or to a physical parameter. The optical waveguide comprises a core and a cladding having a cladding refractive index lower than that of the core for guiding light to be propagated in the optical waveguide. The cladding defines with the core an optical waveguide providing mode coupling. A chemical indicator is provided in the cladding for causing a variation of the optical absorption of the cladding as a function of the chemical species or the physical parameter. The cladding is interrogated by the evanescent wave of the propagated light. The mode coupling causes unabsorbed light power to be redistributed among the multiple modes while light propagates along the optical waveguide.
REFERENCES:
patent: 4893894 (1990-01-01), Caimi
patent: 5164588 (1992-11-01), Marcus
patent: 5239176 (1993-08-01), Stevenson
patent: 5525800 (1996-06-01), Sanghera et al.
patent: 6198861 (2001-03-01), Kellar et al.
patent: 7167615 (2007-01-01), Wawro et al.
patent: 2003/0217920 (2003-11-01), Peper et al.
patent: 0054039 (2000-09-01), None
Inagawa, Ikuo et al. “Temperature Dependence of Transmission Loss of Chalcogenide Glass Fibers”, Japanese Journal of Applied Physics 36 (1997) p. 2229-2235.
Kurt Seiler, “Ion-Selective Optode Membranes”, Fluka Chemie AG, CH-9470 Buchs, 1993.
N. J. Harrick, “Internal Reflection Spectroscopy”, Harrick Scientific Corporation, Ossining, NY, 1979, pp. 89, 90, 92-145.
F. P. Payne et al., “Deviation from Beer's law in multimode optical fiber evanescent field sensors”, International Journal of Optoelectronics, vol. 8, pp. 743-748, Cambridge University Engineering Department, England, 1993.
S. Savovic et al., “Method for calculating the coupling coefficient in step-index optical fibers”, Applied Optics, 46, 1477, 2007.
V. Rudy et al., “Evanescent wave absorption spectroscopy using multimode fibers”, School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland, 1990, J. Appl. Phys. vol. 67, No. 10, pp. 6070-6074.
I. Pierrejean et al., “Effects of structural anomalies of the PMMA core in the plastic optical fibers”, First Plastic Optical Fibres and Applications Conference, held in Paris, France, Jun. 22-23, 1992, pp. 96-100.
Michael D. Degrandpre et al., “Long Path Fiber-Optic Sensor for Evanescent Field Absorbance Measurements”, Center for Process Analytical Chemistry, Department of Chemistry, BG-10, University of Washington, Seattle, Washington, 1988, Analytical Chemistry, vol. 60, No. 23, pp. 2582-2586.
H. Tai et al., “Fiber-optic evanescent-wave methane-gas sensor using optical absorption for the 3.392-um line of a He-Ne laser”, Research and Development Institute, Optics Letters, vol. 12, No. 6, pp. 437-439, Jun. 1987.
D. Gloge, “Weakly Guiding Fibers”, Bell Telephone Laboratories, Inc., Crawford Hill Laboratory, Holmdel, NJ, Applied Optics, vol. 10, No. 10, Oct. 1971, pp. 2252-2258.
P. G. Lye et al., “Investigating the sensitivity of PMMA optical fibres for use as an evanescent field absorption sensor in aqueous solutions”, Institute of Physics Publishing, Journal of Physics: Conference Series 15 (2005), pp. 262-269.
Caron Serge
Fougeres Andre
Mouslinkina Lia
Pare Claude
Institut National D'Optique
Ogilvy Renault LLP
Slomski Rebecca C
Toatley Gregory J
LandOfFree
Evanescent wave multimode optical waveguide sensor with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Evanescent wave multimode optical waveguide sensor with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evanescent wave multimode optical waveguide sensor with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2627227