Multi-wavelength time domain reflectometer

Details Multi-wavelength time domain reflectometer Multi-wavelength time domain reflectometer

1987-12-10

1990-02-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, H01J 516

Patent

active

049048643

ABSTRACT:
An optical time domain reflectometry system in which laser level reference signals are derived from the respective laser outputs from the laser sources and fed into a single receiver provided for receiving the back-scattered or returned light along an optical fibre. The receiver is thus continuously calibrated in accordance with the relative intensities of the optical signals at different frequencies being launched into the optical fibre so that the receiver provides an accurate measurement of temperature or other parameter being measured by the system.

REFERENCES:
patent: 4356396 (1982-10-01), Ruell et al.
patent: 4477725 (1984-10-01), Asawa et al.
patent: 4523092 (1985-06-01), Nelson
patent: 4703175 (1987-10-01), Salour et al.

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