Method of apparatus for remotely pumping a rare-earth doped opti

Details Method of apparatus for remotely pumping a rare-earth doped opti Method of apparatus for remotely pumping a rare-earth doped opti

1999-02-16

2000-10-31

Spyrou, Cassandra

Optical waveguides

With optical coupler

Plural

359334, 359341, G02B 628

Patent

active

061414689

ABSTRACT:
A method and apparatus is provided for providing pump energy to a doped optical fiber located along an optical transmission path. The doped optical fiber imparts amplification to an optical signal when pumped at a pump wavelength. In accordance with the method, pump energy is generated in the transmission fiber by introducing a power at a wavelength one Raman Stokes order below the desired pump wavelength. The pump energy is transmitted along the transmission path such that first order Raman Stokes-shifted light is applied to the doped optical fiber. For example, if the optical fiber is doped with erbium, which has a pump wavelength of about 1485 nm, pump energy is provided at a wavelength of 1390 nm.

REFERENCES:
patent: 4790619 (1988-12-01), Lines
patent: 5058974 (1991-10-01), Mollenauer
patent: 5323474 (1994-06-01), Hornung
patent: 5917969 (1999-06-01), Gavrilovic
patent: 6081366 (2000-06-01), Kidorf

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