Optical amplifying fiber and forming method for fiber grating

Details Optical amplifying fiber and forming method for fiber grating Optical amplifying fiber and forming method for fiber grating

1998-03-16

2000-10-17

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

H01S 300

Patent

active

061340464

ABSTRACT:
An optical amplifying fiber including a core doped with a rare earth element and having a first refractive index, a cladding surrounding the core and having a second refractive index smaller than the first refractive index, and a fiber grating formed in the core for transmitting signal light having a first wavelength and pump light having a second wavelength and removing amplified spontaneous emission. The fiber grating is preferably positioned upstream of a middle point of the entire length of the optical amplifying fiber in terms of a propagation direction of signal light.

REFERENCES:
patent: 5260823 (1993-11-01), Payne et al.
patent: 5337382 (1994-08-01), Mizrahi
patent: 5764829 (1998-06-01), Judkins et al.
patent: 5875203 (1999-02-01), Wagener et al.

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