Title :
1.4-μm-band gain characteristics of a Tm-Ho-doped ZBLYAN fiber amplifier pumped in the 0.8-μm band
Author :
Sakamoto, T. ; Shimizu, M. ; Kanamori, T. ; Terunuma, Y. ; Ohishi, Yasutake ; Yamada, M. ; Sudo, S.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
Abstract :
The gain characteristics of a 1.4-μm-band thulium-holmium-doped ZBLYAN fiber amplifier are described. Signal gain is obtained over the whole 1.4-μm band for a pump power level of 73.5 mW. A maximum signal gain of 18 dB is achieved at a signal wavelength of 6.46 μm for a pump power of 150 mW at 0.79 μm. The noise figure is 5.6 dB in the signal wavelength region from 1.45-1.50 μm. From a comparison of the gain characteristics of thulium-holmium-doped ZBLYAN fibers and thulium-doped ZBLYAN fibers, it is proved that holmium ions play an effective role in increasing the gain and widening the gain spectrum.
Keywords :
aluminium compounds; barium compounds; fibre lasers; holmium; lanthanum compounds; optical pumping; thulium; yttrium compounds; zirconium compounds; 1.4 mum; 1.5 mum; 150 mW; 18 dB; 73.5 mW; Tm-Ho-doped ZBLYAN fiber amplifier; ZrF/sub 4/-BaF/sub 2/-LaF/sub 3/-AlF/sub 3/NaF:Tm,Ho; gain characteristics; gain spectrum; maximum signal gain; noise figure; pump power level; signal gain; signal wavelength; signal wavelength region; Fiber lasers; Laser excitation; Optical fiber amplifiers; Optical fiber couplers; Optical fiber devices; Optical fibers; Optical pumping; Pump lasers; Silicon compounds; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
