Device for fault localization in repeaterless transmission syste

Details Device for fault localization in repeaterless transmission syste Device for fault localization in repeaterless transmission syste

1996-09-25

1998-07-07

Ngo, John

Optical waveguides

With optical coupler

Plural

359134, 359160, 385147, 372 6, G02B 628

Patent

active

057781176

ABSTRACT:
A device is used for receiving input signal light and pump light from a first remote site through a first optical fiber and a second optical fiber, respectively, and for sending amplified signal light through a third optical fiber to a second remote site. The device includes an amplifier unit for amplifying the input signal light by using the pump light to transmit the amplified signal light to the third optical fiber, the amplifier unit having a prevention unit for preventing light coming back through the third optical fiber from entering the amplifier unit, and a path providing unit for providing a path inside the device, the path leading reflection light coming through the third optical fiber to a connection point of the device, the connection point having optical connection with the first remote site, wherein the reflection light is a light pulse for fault localization reflected at a fault point on the third optical fiber, the light pulse for fault localization sent to the third optical fiber from the first remote site via the device.

REFERENCES:
patent: 5185826 (1993-02-01), Delavaux
patent: 5214728 (1993-05-01), Shigematsu et al.
patent: 5542011 (1996-07-01), Robinson
patent: 5555118 (1996-09-01), Huber
patent: 5572612 (1996-11-01), Delavaux et al.
patent: 5598491 (1997-01-01), Ohya et al.

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