Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1995-01-11
1997-07-22
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022718, 25022721, 359124, G01J 350
Patent
active
056506120
ABSTRACT:
An optical sensor system uses a light source which outputs light at a plurality of wavelengths which vary with time in a manner such that only one wavelength is output at any one point in time; and a transducer which modulates light at each wavelength in a manner indicative of the parameter (for example, position or temperature) begin sensed. The transducer's output is, therefore, an optical signal in which the modulated intensity varies with time since only one wavelength is output at any one point in time. Because only a single wavelength is output at any one time, there is no need for an optical demultiplexer and detector array. Only a single detector is needed.
REFERENCES:
patent: 4367040 (1983-01-01), Goto
patent: 4833317 (1989-05-01), Huggins
patent: 4931636 (1990-06-01), Huggins
patent: 4964727 (1990-10-01), Huggins
patent: 5010346 (1991-04-01), Hamilton et al.
patent: 5020379 (1991-06-01), Berthold et al.
patent: 5068528 (1991-11-01), Miller et al.
patent: 5196694 (1993-03-01), Berthold et al.
patent: 5227624 (1993-07-01), Henning et al.
patent: 5281811 (1994-01-01), Lewis
patent: 5401958 (1995-03-01), Berkcan
Jack L. Jewell, J. P. Harbison, A. Scherer, Y. H. Lee, and L. T. Florez, Vertical-Cavity Surface-Emitting Lasers: Design, Growth, Fabrication, Characterization, IEEE Journal of Quantum Electronics, vol. 27, No. 6 Jun. 1991.
Jack Jewell, Surface-emitting lasers reach R&D threshold, Laser Focus World May 1990.
L. A. Coldren, R. S. Geels, S. W. Corzine, J. W. Scott, An Invited Paper Efficient vertical-cavity lasers, Optical and Quantum Electronics 24(1992) S105-S119.
Connie J. Chang-Hasnain, J. P. Harbison, Chung-En Zah, M. W. Maeda, L. T. Florez, N. G. Stoffel, and Tien-Pei Lee, Multiple Wavelength Tunable Surface-Emitting Laser Arrays, IEEE Journal of Quantum Electronics, vol. 27, No. 6, Jun. 1991.
Surface Emitting Laser Arrays with Uniformly Separated Wavelengths, Reprinted from Electronics Letters 21st Jun. 1990 vol. 26, No. 13 pp. 940-941.
B. Tell, K. F. Brown-Goebeler, R. E. Leibenguth, F. M. Baez, and Y. H. Lee, Temperature dependence of GaAs-AIGaAs vertical cavity surface emitting lasers, Appl. Phys. Lett 60, 10 Feb. 1992.
Jack L. Jewell and Greg R Olbright, Surface-emitting lasers emerge from the laboratory, Laser Focus World May 1992 (p217).
Optic Letters, vol. 16, No. 12, Jun. 15, 1991.
Jack L. Jewell, James P. Harbison and Axel Scherer, Microlasers, Scientific American Nov. 1991.
Connie J. Chang-Hasnain, J. P. Harbison, Chung-En Zah, M. W. Maeda, L. T. Florex, N. G. Stoffel, Tien-Pei Lee, Multiple Wavelength Tunable Surface-Emitting Laser Arrays, 0018-9197/91/0600-1368501.00.COPYRGT. 1991 IEEE.
K. Tai, K. F. Huang, C. C. Wu and J. D. Wynn, Continuous Wave Visible InGaAIP Quantum Well Surface Emitting Laser Diodes, Electronics Letters 22 Jul. 1993 vol. 29, No. 15.
B. Moller, E. Zeeb, U. Fiedler, T. Hackbarth, and K. J. Ebeling, Linewidth Enhancement Factor of Vertical-Cavity Surface-Emitting Laser Diodes, 1041-1135/94$04.00.COPYRGT. 1994 IEEE.
M. G. Peters, D. B. Young, F. H. Peters, J. W. Scott, B. J. Thibeault and L. A. Coldren, 17.3% Peak Wall Plug Efficiency Vertical-Cavity Surface-Emitting Lasers Using Lower Barrier Mirrors, 1041-1135/94$04.00.COPYRGT. 1994 IEEE.
R. A. Morgan, G. D. Guth, C. Zimmer, R. E. Leibenguth, M. W. Focht, J. M. Freund, K. G. Glogovsky, T. Mullally, F. F. Judd, M. T. Asom, Two Dimensional Matrix Addressed Vertical Cavity Top-Surface Emitting Laser Array Display, 1041-1135/93$04.00.COPYRGT. 1994IEEE.
Yoshitaka Kohama, Yoshitaka Ohiso, Seiji Fukushima, Takashi Kurokawa, 8.times.8 Independently Addressable Vertical-Cavity Surface-Emitting Laser Diode Arrays Grown by MOCVD, 1041 1135/94$04.00.COPYRGT. 1994 IEEE.
G. Shtengel, H. Temkin, P. Brusenbach, T. Uchida, M. Kim, C. Parsons, W. E. Quinn, S. E. Swirhun, High-Speed Vertical-Cavity Surface Emitting Laser, 1041-1135/93$03.00.COPYRGT. 1993 IEEE.
M. W. Maeda, C. J. Chang-Hasnain, Chinlon Lin, J. S. Patel, H. A. Johnson, J. A. Walker, Use of a Multiwave Surface-Emitting Laser Array in a Four-Channel Wavelength-Division-Multiplexed System Experiment, 1041-1135/91/0300-0268$01.00.COPYRGT. 1991 IEEE.
K. Rastani, M. Orenstein, E. Kapon, A. C. Von Lehmen, Integration of planar Fresnel microlenses with vertical-cavity surface-emitting laser arrays, 0146-9592/91/120919-03$5.00/0.COPYRGT. 1991 Optical Society of America.
Criswell Tommy L.
Huggins Raymond W.
Reddy Mahesh C.
Calogero Stephen
Redman Mary Y.
The Boeing Company
Westin Edward P.
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