Samson, B.N., Dong, L., Loh, W.H. and Hsu, K.
High power (60mW) single frequency erbium:ytterbium codoped fiber laser.
In, 3rd Asia-Pacific Conference on Communications (APCC 97), Sydney, AU,
07 - 10 Dec 1997.
The characteristics of a high power Er3+:Yb3+ single frequency fiber laser pumped at 980nm are reported. The device gives 60mW output power with RIN 10MHz and linewidth 500kHz. At low output powers (< 30mW) the slope efficiency is as high as 25%, falling to 12% at higher powers, the saturation behaviour is related to a bottleneck effect due to the finite Yb-Er transfer rate. Improved performance can be obtained using new fibers with an increased rare-earth concentration which show negligible signs of erbium clustering
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