Digital telemetry system and method for fault detection in optic

Details Digital telemetry system and method for fault detection in optic Digital telemetry system and method for fault detection in optic

1991-06-14

1993-11-09

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359160, 359173, 359176, 359179, 359341, 34087028, 372 6, 371 201, H04B 1008, H04B 1000, H04B 1002

Patent

active

052608190

ABSTRACT:
A digital telemetry system/method for locating faults in an optical transmission system including optical amplifiers, in particular optical fiber amplifiers. A supervisory codeword is applied at the transmission end of the system. At each amplifier the presence of the supervisory codeword or a distress codeword from a previous amplifier is looked for. If either codeword is detected it is relayed to the next amplifier. If neither codeword is detected a respective distress codeword is applied. At the receiver end of the system the supervisory codeword is sought or, in its absence, a distress codeword or no codeword at all and from this information the position of a system fault determined.

REFERENCES:
patent: 4918396 (1990-04-01), Halemane et al.
patent: 4995100 (1991-02-01), Stallard et al.
patent: 5050949 (1991-09-01), DiGiovanni et al.

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