High power superfluorescent source with stable single-transverse-mode output using a multimode Er-doped fibre

摘要

A high power superfluorescent Er-doped fibre source with an environment-insensitive single-transverse-mode output is demonstrated using multimode fibre. The efficient fundamental mode selection is explained by strong ground state absorption. The fibres deliver up to /spl sime/770 mW of output power with the highest conversion efficiency of 58%.