Title :
Optimum design of Er3+-Yb3+ codoped fibers for large-signal high-pump-power applications
Author_Institution :
Inst. of Radio Eng. & Electron., Czechoslovak Acad. of Sci., Prague, Czech Republic
fDate :
10/1/1997 12:00:00 AM
Abstract :
A comprehensive numerical fiber amplifier model has been used to optimize Er3+-Yb3+ codoped active fiber for maximum gain and quantum conversion efficiency (QCE) at large signal operation. The optimum cutoff wavelength of the LP11 mode has been found to increase from 800 mm at low pump powers (≈50 mW) to 1400 mn at pump powers higher than 500 mW. While at low pump powers fibers with higher numerical aperture give higher QCE, at high pump levels better large signal performance is achieved with fibers having lower numerical aperture
Keywords :
erbium; fibre lasers; laser theory; laser transitions; optical pumping; ytterbium; 50 to 500 mW; 800 to 1400 nm; Er3+-Yb3+ codoped fibers; LP11 mode; active fiber; higher numerical aperture; large signal operation; large signal performance; large-signal high-pump-power applications; lower numerical aperture; maximum gain; numerical fiber amplifier model; optimum cutoff wavelength; optimum design; pump powers; quantum conversion efficiency; Absorption; Apertures; Erbium; Erbium-doped fiber lasers; Optical fiber amplifiers; Optical fiber communication; Optical fibers; Optical receivers; Pump lasers; Solid lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
