Title :
Bending loss effect on signal gain in an Er/sup 3+/-doped fiber amplifier
Author :
Ohashi, Masaharu ; Shiraki, Kazuyuki
Author_Institution :
NTT Telecomm. Field Syst. R&D Center, Ibaraki, Japan
Abstract :
A theoretical description is given of the bending loss effect on signal gain in an optical fiber amplifier when Er/sup 3+/-doped fiber is wound on a bobbin. The dependence of signal gain on bending radius for an Er/sup 3+/-doped fiber amplifier pumped by a 1.48- mu m laser diode is determined using the rate equation for a three-level laser system, taking the bending property into account. The fiber parameters necessary to achieve maximum signal gain are shown to be dependent on the bending loss.<>
Keywords :
bending; erbium; fibre lasers; optical losses; optical pumping; 1.48 micron; Er/sup 3+/-doped fiber amplifier; bending loss effect; bending radius; laser diode pump; optical fiber amplifier; rate equation; signal gain; three-level laser system; Diode lasers; Equations; Erbium; Fiber lasers; Laser excitation; Optical fiber amplifiers; Optical fiber losses; Optical losses; Pump lasers; Wounds;
Journal_Title :
Photonics Technology Letters, IEEE
