Optical fiber test instrument calibrator

Details Optical fiber test instrument calibrator Optical fiber test instrument calibrator

1982-11-01

1985-02-05

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

350 9615, 356243, G01N 2184, G02B 514

Patent

active

044975759

ABSTRACT:
An optical time domain reflectometer including a light source and a light detector is calibrated using an optical directional coupler having a first port connected to the reflectometer and second and third ports connected to two opposite ends of an optical transmission member. Light pulses from the light source are introduced into the transmission member by way of one end thereof, and reflected and backscattered light from the transmission member is detected by the light detector. The reflectometer provides a display of the time relation between light pulses generated by the light source and electrical signals generated by the light detector, and the display is utilized in conjunction with a known propagation characteristic of the optical transmission member, to calibrate the reflectometer.

REFERENCES:
patent: 4136929 (1979-01-01), Suzaki
patent: 4167328 (1979-09-01), Cross et al.

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