[Show abstract][Hide abstract]ABSTRACT: An erbium–ytterbium co-doped fibre ring laser pumped by a 976 nm laser diode array is presented. The laser power reaches 1.07 W at 1565.8 nm under 3.5 W pump power, with an optical conversion efficiency of 30.6%. The optimal output splitting ratio is demonstrated to be 99%. Stable output with a fine-shaped laser spectrum is achieved, although no wavelength selecting component is utilized. The laser linewidth increases with pump power and approaches 0.5 nm at high pump power levels, indicating the inhomogeneous broadening property of the gain medium.
No preview · Article · Jun 2005 · Journal of Optics A Pure and Applied Optics
[Show abstract][Hide abstract]ABSTRACT: An L band superfluorescent fiber source (SFS) with output power of 0.94W is presented, under 4.4W 976nm pump power. The optical conversion efficiency is about 21%. The spectrum covers the broad wavelength range from 1560nm to 1615nm. The high power L band SFS is constructed by a low power L band amplified spontaneous emission (ASE) seed source and a high power erbium-ytterbium co-doped fiber (EYDF) amplifier in double pass forward pumping configuration.