Title :
Numerical analysis of Pr/sup 3+/-doped fluoride fiber amplifier
Author_Institution :
Inst. fuer Hochfrequenztechnik, Technische Univ., Braunschweig, Germany
Abstract :
A large-signal model for a four-level laser system has been used to study the small-signal and large-signal properties of a praseodymium-doped fluoride fiber amplifier. The model takes into account the LP/sub 1/ mode radial field distribution in step-index single-mode fiber and experimentally obtained signal emission and pump absorption cross-sections. It has been found that the optimum cutoff wavelength is 750 nm and is independent of numerical aperture and input pump power. The numerical aperture should be made as high as possible.<>
Keywords :
fibre lasers; laser theory; optical pumping; praseodymium; 750 nm; LP/sub 1/ mode radial field distribution; Pr/sup 3+/-doped fluoride fiber amplifier; four-level laser system; input pump power; large-signal model; large-signal properties; numerical analysis; numerical aperture; optimum cutoff wavelength; pump absorption cross-sections; signal emission cross section; small signal properties; step-index single-mode fiber; Absorption; Erbium-doped fiber lasers; Laser excitation; Laser modes; Laser transitions; Numerical analysis; Optical fiber amplifiers; Optical propagation; Power system modeling; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
