Title :
35-dB gain Tm-doped ZBLYAN fiber amplifier operating at 1.65 μm
Author :
Sakamoto, T. ; Shimizu, M. ; Yamada, M. ; Kanamori, T. ; Ohishi, Yasutake ; Terunuma, Y. ; Sudo, S.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
3/1/1996 12:00:00 AM
Abstract :
We demonstrate the first high gain rare-earth-doped fiber amplifier operating at 1.65 μm. It consists of ZBLYAN fiber with a Tm/sup 3+/-doped core and Tb/sup 3+/-doped cladding, pumped by 1.22 μm laser diodes. It is possible to achieve efficient amplification with Tm/sup 3+/ ions if their amplified spontaneous emission (ASE) in the 1.75 to 2.0 μm wavelength region is suppressed by doping Tb/sup 3+/ ions in the cladding. A two-stage-type fiber amplifier is constructed and a signal gain of 35 dB is achieved for a pump power of 140 mW. A gain over 25 dB is realized in the 1.65 μm to 1.67 μm wavelength region.
Keywords :
aluminium compounds; barium compounds; fibre lasers; lanthanum compounds; optical fibre cladding; optical pumping; sodium compounds; superradiance; zirconium compounds; 1.22 mum; 1.65 mum; 1.65 to 1.67 mum; 1.75 to 2 mum; 140 mW; 25 dB; 35 dB; Tb/sup 3+/-doped cladding; Tm-doped ZBLYAN fiber amplifier; Tm/sup 3+/-doped core; ZBLANY:Tb; ZrF4-BaF2-LaF3-AlF3-NaFY:Tb; amplified spontaneous emission; high gain rare-earth-doped fiber amplifier; laser diodes; optical pumping; pump power; signal gain; two-stage-type fiber amplifier; Absorption; Diode lasers; Doped fiber amplifiers; Gain; Laser excitation; Optical fiber amplifiers; Optical fiber polarization; Optical fiber testing; Pulse amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
