Title :
Investigation of efficient pump scheme for Pr/sup 3+/-doped fluoride fiber amplifiers
Author :
Ohishi, Yasutake ; Kanamori, Terutoshi ; Terunuma, Yukio ; Shimizu, Makoto ; Yamada, Makoto ; Sudo, Shoichi
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
Abstract :
Numerical analysis reveals that a bi-directional pump scheme suppresses the population reduction of the /sup 1/G/sub 4/ level due to pump ESA and cooperative upconversion. It is confirmed experimentally that the gain coefficient increases from 0.21 to 0.24 dB/mW, which is the maximum single pass gain coefficient ever reported, with the bi-directional pump scheme. It is shown that this pump scheme is effective in extracting the potential of Pr/sup 3+/-doped fluoride fibers.<>
Keywords :
fibre lasers; fluoride glasses; numerical analysis; optical pumping; praseodymium; /sup 1/G/sub 4/ level; Pr/sup 3+/-doped fluoride fiber amplifiers; ZBLAN:Pr; ZrF4-BaF2-LaF3-AlF3-NaF:Pr; bi-directional pump scheme; cooperative upconversion; efficient pump scheme; gain coefficient; maximum single pass gain coefficient; numerical analysis; population reduction; pump ESA; Absorption; Bidirectional control; Diode lasers; Glass; Numerical analysis; Optical fiber amplifiers; Optical pumping; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
