Optical waveguides – Optical waveguide sensor
Patent
1991-09-23
1994-05-24
Ullah, Akm E.
Optical waveguides
Optical waveguide sensor
25022711, 257 82, G02B 602, G02B 612
Patent
active
053156722
ABSTRACT:
A fiber optic sensor for detecting the presence or concentration of particular chemical or biological species in a zone to be monitored has light-emitting and detecting elements such as a gallium arsenide light-emitting diode and a Schottky diode light detector provided in a semiconductor body, and has an optical fiber formed in situ on a surface of the body to conduct light from the light-emitting diode to the detector. The fiber has a long light-transmitting core of a material such as silicon dioxide deposited on a semiconductor body surface and defined by photolithographic techniques and has a cladding deposited over and around the core of a material of relatively lower refractive index than the core. The cladding material reacts when contacted by the particular chemical or biological species to produce measurable changes in transmission of light through the fiber so that the detector provides an electrical signal representative of the presence or concentration of the species.
REFERENCES:
patent: 4523092 (1985-06-01), Nelson
patent: 4755667 (1988-07-01), Marsoner et al.
patent: 4824206 (1989-04-01), Klainer et al.
patent: 4846548 (1989-07-01), Klainer
patent: 4872759 (1989-10-01), Stich-Baumeister
patent: 4892374 (1990-01-01), Ackerman et al.
patent: 4913519 (1990-04-01), Klainer et al.
patent: 4940328 (1990-07-01), Hartman
patent: 4984863 (1991-01-01), Parriaux et al.
Patent Abstracts of Japan, vol. 4, No. 39 (P-004) 28 Mar. 1980 & JP-A-55 012 463 (NEC) 29 Jan. 1980.
ISA Transactions, vol. 28, No. 2, 1989, Pittsburgh US, pp. 71-77.
Baumann Russell E.
Donaldson Richard L.
Grossman Rene E.
Texas Instruments Incorporated
Ullah Akm E.
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