Title :
Clad-pumped Yb,Er codoped fiber lasers
Author :
Cheo, P.K. ; King, G.G.
Author_Institution :
PC Photonics Corp., Waterford, CT, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
Double-clad and Yb,Er codoped fiber lasers emitting at eye-safe wavelengths (>1.5 μm) have been investigated by varying the codopant concentrations, core modifiers, fiber length, and the spectrum of the diode pump. With a proper composition, the laser output contains only one lasing wavelength, at 1.6 μm. Highest slope efficiency greater than 60% for this three-level system, emitting only at 1.6 μm, has been obtained by using a 20-m-long, double-clad and codoped fiber with the core and clad diameters of 6.3 and 300 μm, respectively. By tradeoff of slope efficiency fur higher output power, a 30-m-long fiber is considered to be the best choice.
Keywords :
erbium; fibre lasers; laser transitions; optical fibre cladding; optical pumping; safety; ytterbium; 1.5 mum; 1.6 mum; 20 m; 30 m; 300 mum; 6.3 mum; 60 percent; Yb,Er codoped fiber lasers; clad-pumped Yb,Er codoped fiber lasers; codopant concentrations; diode pump; double-clad; eye-safe wavelengths; fiber length; laser output; lasing wavelength; output power; slope efficiency; three-level system; Absorption; Diodes; Erbium; Erbium-doped fiber lasers; Fiber lasers; Laser excitation; Power generation; Pump lasers; Silicon compounds; Stationary state;
Journal_Title :
Photonics Technology Letters, IEEE
