Method and apparatus for implementing optical supervisory...

Details Method and apparatus for implementing optical supervisory... Method and apparatus for implementing optical supervisory...

2007-01-02

2007-01-02

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C398S031000, C398S181000

Reexamination Certificate

active

10703802

ABSTRACT:
Method and apparatus for implementing optical supervisory channel using broadband noise modulation are described. One embodiment of the present invention is a system for transmitting a supervisory channel from an optical fiber amplifier. The system comprises a first stage amplifier and a noise modulator module. The noise modulator module includes an erbium-doped fiber (“EDF”) that receives a pump for exciting the EDF and emits an amplified noise signal and a modulator that modulates the amplified noise signal with a supervisory signal, wherein the modulated noise signal is input back into the first stage amplifier.

REFERENCES:
patent: 6111687 (2000-08-01), Tammela
patent: 6404527 (2002-06-01), Jensen
patent: 6930823 (2005-08-01), Nakamoto et al.
patent: 2003/0011855 (2003-01-01), Fujiwara
patent: 0 408 905 (1991-01-01), None
patent: 0 415 438 (1996-11-01), None
patent: 1 035 669 (2000-09-01), None
patent: WO 98/27674 (1998-06-01), None

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