Optical source for optical sensing system

Details Optical source for optical sensing system Optical source for optical sensing system

1990-04-09

1991-07-09

Lee, John D.

G02B 634

Patent

active

050299670

ABSTRACT:
An optical source for use in an optical sensing system such as a wavelength division multiplexing system. The source produces an optical interrogation signal comprising a plurality of component signals, each component signal comprising light in a wavelength band different from the wavelength bands of the other component signals. The source comprises a concave diffraction grating, means for forming an aperture at which the interrogation signal will be formed, and a plurality of optical emitters. Each emitter is positioned such that the emitter output signal strikes the concave diffraction grating, and is focused onto the aperture, such that a portion of the emitter signal enters the aperture and forms one of the component signals. As a result, the component signal wavelengths are not sensitive to temperature-induced fluctuations in the emitter output signal.

REFERENCES:
patent: 3387285 (1963-12-01), Horton
patent: 3532429 (1967-06-01), Hughes et al.
patent: 4223216 (1980-09-01), Quick et al.
patent: 4334152 (1982-06-01), Dakin et al.
patent: 4517456 (1985-05-01), Halsall et al.
patent: 4703472 (1987-10-01), Blumentritt et al.
patent: 4740688 (1988-04-01), Edwards
patent: 4816672 (1989-03-01), Hughes
patent: 4826270 (1989-05-01), Opheij et al.
patent: 4849624 (1989-07-01), Huggins
Dianov et al., Spectral Channel Demultiplexer Utilizing a Planar Multimode Waveguide, Sov. J. Quantum Electron, 11(2), Feb. 1981, pp. 229-230.
Fritsch et al., Wavelength-Division Multiplexed Digital Optical Position Transducer, Optics Letters, 11(1), Jan. 1986, pp. 1-3.
Lewis, N., Fiber Optic Sensor Offer Advantages for Aircraft, SPIE Optical Engineering Reports, Jun. 1957.
Touzet et al., Design of New Holographic Gratings for a High S/N Ratio Flat Field Spectrograph, Proceedings Reprint: SPIE Optical System Design, Analysis and Production for Advanced Technology Systems, 1986, pp. 409-415.
Yen et al, Planar Rowland Spectrometer for Fiber-Optic Wavelength Demultiplexing, Optics Letters, 6(12), Dec. 1981, pp. 639-641.
Concave Diffraction Gratings Design Guide, American Holographic.
U.S. patent application Ser. No. 325,249, Filed Mar. 17, 1989, Optical Digital Encoder Using Rowland Spectrometer.

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