Title :
High output power from an efficient praseodymium-doped fluoride fiber amplifier
Author :
Whitley, Tim ; Wyatt, Richard ; Szebesta, Daryl ; Davey, Steve
Author_Institution :
BT Labs., Ipswich, UK
fDate :
4/1/1993 12:00:00 AM
Abstract :
A praseodymium doped fluoride fiber amplifier (PDFFA) exhibiting efficient operation in both the large- and the small-signal regimes is described. The amplifier, based on a high NA fluoride fiber, exhibited a maximum small-signal gain of 29 dB and a low-pump small-signal. efficiency of 0.13 dB/mW. In the saturated regime a maximum output power of 212 mW was achieved. In this format, the signal-out versus pump-in characteristic, exhibited a slope efficiency of 30%, representing the most efficient conversion from pump to signal yet reported. Detailed spectral characterization reveals small-signal gain in excess of 20 dB over a wavelength range of almost 50 nm and in excess of 100 mW of saturated output available over a 30-nm wavelength range.<>
Keywords :
aluminium compounds; barium compounds; fibre lasers; lanthanum compounds; lead compounds; optical pumping; optical saturation; praseodymium; sodium compounds; zirconium compounds; 100 mW; 212 mW; 29 dB; 30 percent; Pr-doped fluoride fibre amplifier; ZBLANP:Pr; ZrF4-BaF2-LaF3-AlF3-NaF-PbF2:Pr; high NA fluoride fiber; large-signal regimes; low-pump small-signal. efficiency; maximum output power; maximum small-signal gain; pump-in characteristic; saturated output; saturated regime; signal-out; slope efficiency; small-signal regimes; spectral characterization; wavelength range; Diodes; Doped fiber amplifiers; Fiber lasers; High power amplifiers; Laser excitation; Optical fiber amplifiers; Optical fibers; Power amplifiers; Power generation; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
