Optical time domain reflectometer for measurements in optical ne

Details Optical time domain reflectometer for measurements in optical ne Optical time domain reflectometer for measurements in optical ne

1997-11-26

2000-10-31

Kim, Robert

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2100

Patent

active

061410896

ABSTRACT:
In an optical time domain reflectometer for the measurement in optical networks with currently applied traffic signals a switchable filter device Is positioned before a detector unit for the measurement of the reflected optical signals caused by an optical measurement section. The filter device includes an optical path into which one or more optical filters can be inserted reversibly, e.g. by an actuator. Communication signals present on the measurement section are attenuated by the filter(s) and the detector unit is able to detect the reflected signals undisturbed by the communication signals.

REFERENCES:
patent: 4591231 (1986-05-01), Kaiser et al.
patent: 4737026 (1988-04-01), Dalgoutte et al.
patent: 4749247 (1988-06-01), Large
patent: 5453827 (1995-09-01), Lee
patent: 5589933 (1996-12-01), Osgood et al.

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