Rare earth-doped fiber amplifier assemblies for fiberoptic netwo

Details Rare earth-doped fiber amplifier assemblies for fiberoptic netwo Rare earth-doped fiber amplifier assemblies for fiberoptic netwo

1996-01-17

1997-11-18

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling function

385 11, 385 15, 385 30, 385 31, 385 33, 385 46, 385 47, 359333, 359341, 359345, 372 6, G02B 626, H01S 300, H01S 330

Patent

active

056895950

ABSTRACT:
Assemblies having a first optical circulator, a pumping laser, a rare-earth doped fiber and a first coupler are described. The first coupler has a first fiber connected to the optical circulator, a second fiber connected to said pumping laser, and a third fiber connected to one end of the rare-earth doped fiber which is operated as a fiber amplifier. The coupler blocks the pumping laser light from the first fiber and reflects the light into the third fiber. The coupler further transmits the input signals from the first fiber into the third fiber. This arrangement allows the rare-earth doped fiber to amplify the input signals from the energy of the pumping laser light. By changing the elements connected to the second end of the rare-earth doped fiber, optical fiber amplifier assemblies in which the message signals are amplified by passing through the rare-earth doped fiber twice, by pumping the rare-earth doped fiber with two pumping lasers, or both, are provided for.

REFERENCES:
patent: 5280549 (1994-01-01), Barnard et al.
patent: 5303314 (1994-04-01), Duling, III et al.
patent: 5481391 (1996-01-01), Giles
patent: 5532864 (1996-07-01), Alexander et al.
patent: 5563733 (1996-10-01), Mitsuda et al.

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