Fiber amplifiers and pumping sources for fiber amplifiers

Details Fiber amplifiers and pumping sources for fiber amplifiers Fiber amplifiers and pumping sources for fiber amplifiers

1999-08-02

2000-06-27

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359345, 372 70, H01S 300

Patent

active

060813695

ABSTRACT:
An optical amplifier system includes a fiber amplifier doped with rare earth dopant provided in its fiber core. A plurality of fiber lasers have their light outputs optically coupled together for launching into the fiber amplifier for optically pumping the amplifier. Each of the fiber lasers have a rare earth dopant provided in its fiber core for stimulated lasing emission with the rare earth dopant of the fiber amplifier being different from the rear earth dopant of the fiber lasers. A reflector may be provided in each of the coupling fibers for reflecting a portion of the respective light outputs back into the fiber lasers to control their wavelength of operation, the wavelength of operation of the reflectors chosen to be within a high absorption region of the absorption band of the fiber amplifier. Where the pump source is a semiconductor laser source, the source may include a flared gain section to increase the output intensity of the light output of the source.

REFERENCES:
patent: 5793521 (1998-08-01), O'brien et al.
patent: 5867305 (1999-02-01), Waarts et al.
patent: 5920423 (1999-07-01), Grubb et al.
patent: 5923684 (1999-07-01), DiGiovanni et al.
patent: 5930030 (1999-07-01), Scifres
patent: 5933271 (1999-08-01), Waarts et al.

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