Title :
Nd-doped double-clad fiber amplifier at 1.06 μm
Author :
Miyazaki, Tetsuya ; Inagaki, Keizo ; Karasawa, Yoshio ; Yoshida, Minoru
Author_Institution :
Opt. & Radio Commun. Res. Lab., Saitama, Japan
fDate :
4/1/1998 12:00:00 AM
Abstract :
We propose and demonstrate a double-clad neodymium (Nd)-doped fiber amplifier (IVDFA) at 1.06 μm for a compact configuration of a high-power optical amplifier. The proposed 125 μm first cladding diameter in the double-clad fiber, provides the single-mode propagation of the signal lightwave into its doped core without misguiding the signal lightwave into the outer core (first cladding), by simply splicing with a standard single-mode fiber. Furthermore a fiber grating in a single-mode core of the double-clad fiber allows the double-pass configuration for the signal lightwave at 1.06 μm and also allows the pump lightwave coupling at 0.81 μm into the first cladding without employing a bulk dichroic mirror. We demonstrate the signal output power of 110 mW for a 550-mW pump input from a multimode fiber coupled pump source. Theoretical results predict an efficient high-power operation of the amplifier by improving the signal scattering loss in the double-clad fiber
Keywords :
fibre lasers; infrared sources; laser modes; laser transitions; neodymium; optical communication equipment; optical fibre cladding; optical pumping; 1.06 mum; 110 mW; 125 mum; 550 mW; Nd-doped double-clad fiber amplifier; bulk dichroic mirror; compact configuration; doped core; double-clad fiber; double-pass configuration; fiber grating; first cladding diameter; high-power operation; high-power optical amplifier; mW pump input; multimode fiber coupled pump source; outer core; pump lightwave coupling; signal lightwave; signal output power; signal scattering loss; single-mode propagation; standard single-mode fiber; Doped fiber amplifiers; High power amplifiers; Neodymium; Optical fiber amplifiers; Optical propagation; Optical pumping; Optical scattering; Semiconductor optical amplifiers; Splicing; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
