Title :
High absorption and low splice loss properties of hexagonal double-clad fiber
Author :
Yahua Li ; Jackson, S.D. ; Fleming, Simon
Author_Institution :
Opt. Fiber Technol. Centre, Univ. of Sydney, NSW, Australia
Abstract :
An accurate experimental comparison of the pump absorption and the lasing features between Nd/sup 3+/-doped fiber lasers using hexagonal-shaped and D-shaped fiber is reported. The measured slope efficiencies with respect to the absorbed pump power of 805 nm are nearly identical at /spl sim/65.3% for both fibers. Taking advantage of the near symmetrical shape of the hexagonal fiber, the lowest reported splice loss of 0.05 dB is achieved between the double-clad fiber and standard 125-μm fiber with the use of the fiber etching techniques. The pump absorption can be improved by bending the hexagonal fibers into a kidney shape.
Keywords :
bending; etching; fibre lasers; neodymium; optical fibre cladding; optical fibre fabrication; optical fibre losses; optical pumping; splicing; 0.05 dB; 125 mum; 805 nm; D-shaped fiber; Nd/sup 3+/-doped fiber lasers; absorption properties; fiber bending; fiber etching; hexagonal double-clad fiber; hexagonal-shaped fiber; pump absorption; slope efficiencies; splice loss properties; Absorption; Fiber lasers; Laser excitation; Optical fiber communication; Optical fiber devices; Optical fiber sensors; Optical fibers; Power generation; Power lasers; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.834919
