Coherent reflectometer

Details Coherent reflectometer Coherent reflectometer

1984-04-12

1987-06-23

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2188

Patent

active

046748725

ABSTRACT:
An optical reflectometer in which the output from a laser 11 is passed through a ramped phase modulator 12 and an optical fibre bi-directional coupler 13 to a transmission path 15, e.g. an optical fibre. Part of the light is coupled out to a mirror 14 and is reflected to form a local oscillator signal which is mixed in the coupler with backscattered light from the fibre. The mixed signals are applied to a detector 16.

REFERENCES:
patent: 3731103 (1973-05-01), O'Meara
patent: 3796495 (1974-03-01), Laub
patent: 4184738 (1980-01-01), Wright
patent: 4253728 (1981-03-01), Venkatesan
patent: 4289398 (1981-09-01), Robichaud
patent: 4411520 (1983-10-01), Mochizuki et al.
patent: 4497575 (1985-02-01), Philipp

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