Optical time domain reflectometer having pre and post front pane

Details Optical time domain reflectometer having pre and post front pane Optical time domain reflectometer having pre and post front pane

1990-04-25

1991-11-05

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

25022715, G01N 2188

Patent

active

050627040

ABSTRACT:
An improved optical time domain reflectometer, OTDR, has a reference fiber interposed between an optical coupler and a front panel connector for acquiring a reference backscatter level that is independent from a fiber under test. The reference level is used to determine the quality of the front panel connection between the OTDR and the fiber under test and for verifying and adjusting transmitter and receiver circuitry in the OTDR. The reference fiber also allows the acquisition of front panel connector reflection data when a Bragg Cell is used as the optical coupler.

REFERENCES:
patent: 4673299 (1987-06-01), Dakin

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