Abstract

Recent experiments have shown that monomode silica fiber which has rare earth impurity ions incorporated into the core region can exhibit laser action with low threshold and high efficiency when end pumped by an external laser source. [1,2] Initial studies featuring the 4F3/2 - 4I11/2 transition around 1.08 μm of Nd3+ ions in monomode silica fibre have investigated this system under conditions of Q-switching [3] and active modelocking [4] and demonstrated tuning over the range 1.07 μm 1.14 μm [2]. A number of different sources have been used to pump fiber lasers including a cw dye laser [1,3,4], a GaAs diode laser[l] and an Ar+ ion laser[2].

© 1986 Optical Society of America

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