Active optical fiber and optical fiber amplifier

Details Active optical fiber and optical fiber amplifier Active optical fiber and optical fiber amplifier

1998-09-29

2000-05-09

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

H01S 300

Patent

active

060611723

ABSTRACT:
The present invention aims at providing an active optical fiber and an optical fiber amplifier, in which a conversion efficiency of pumping light to be input into the active optical fiber is increased to thereby improve optical amplification characteristic. To this end, the active optical fiber of the present invention is formed with fiber gratings arranged over a predetermined region along the longitudinal direction within the optical fiber doped with a rare earth element, and transmitting signal light and reflecting pumping light. Further, the optical fiber amplifier of the present invention is constituted to comprise a pumping light source for generating pumping light, and a multiplexer for multiplexing signal light and the pumping light to thereby output them into one end of the active optical fiber. Thus, the pumping light is reflected by the fiber gratings so as to go and return within the active optical fiber, thereby improving the conversion efficiency of the pumping light.

REFERENCES:
patent: 5136420 (1992-08-01), Inagaki et al.
patent: 5138483 (1992-08-01), Grasso et al.
patent: 5712715 (1998-01-01), Erdogan et al.
patent: 5757540 (1998-05-01), Judkins et al.

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