Optical time domain reflectometer

Details Optical time domain reflectometer Optical time domain reflectometer

1978-12-04

1981-09-15

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

350 9615, G01N 2184

Patent

active

042893984

ABSTRACT:
An optical time domain relectometer comprising an optical coupler which includes first and second optical fibers, each having a central core surrounded by cladding material. One end of the first optical fiber is positioned adjacent a pulsed light source and one end of the second optical fiber is positioned adjacent an optical detector. The cladding material at the other ends of the first and second optical fibers is fused together to form a composite portion wherein the central cores of the first and second fibers are closely spaced and surrounded by a continuum of cladding material. The end of the composite portion of the coupler is positioned adjacent the optical fiber waveguide under test.

REFERENCES:
patent: 3922063 (1975-11-01), Marrone
patent: 3938895 (1976-02-01), Bridger et al.
patent: 3981592 (1976-09-01), Williams
patent: 3983389 (1976-09-01), Cowardin et al.
patent: 4008061 (1977-02-01), Ramsay
patent: 4012149 (1977-03-01), Bouillie et al.
patent: 4021121 (1977-05-01), Schicketanz
patent: 4054366 (1977-10-01), Barnoski et al.
patent: 4070118 (1978-01-01), Maslowski et al.
patent: 4083625 (1978-04-01), Hudson
patent: 4135779 (1979-01-01), Hudson
"Photon-Probe-An Optical-Fiber Time-Domain Reflectometer" Bell Syst. Tech. Jour., vol. 56, #3, Mar. 1977, Personick, pp. 355-366.
"Optical Time Domain Reflectometer" Barnoski et al., Applied Optics, vol. 16, #9, Sep. 1977, pp. 2375-2379.
"Fiber-Optic Time Domain Reflectometer" unpublished paper by Nelson et al.

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