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Transactions of the Institute of Electronics, Information and Communication Engineers

Optical Stimulated Amplification and Absorption in Erbium-Doped Fiber

Guoli Yin, Xianglin Yang, Mingde Zhang

Published Jan 25, 1992• 0 citations
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An all-optical switch which has a negative amplification of the optical signal was demonstrated in an erbium-doped fiber. The dependence of the negative nonlinear absorption effect on the modulation degree of the incident laser was investigated and we obtained the negative amplification degree of -3 for a fiber length of 6 m at room temperature. It has been confirmed that the mechanism of the effect can be explained by calculating the rate equations based on an analytical model for a five-level system of the Er3+ ion. It is suggested that the effect was due to stimulated emission from the 4 S 3/2 level to the 4 I 13/2 level.

Japanese Journal of Applied Physics•Nov 1, 1997•8 citations
An all-optical switch which has a negative amplification of the optical signal was demonstrated in an erbium-doped fiber. The dependence of the negative nonlinear absorption effect on the modulation degree of the incident laser was investigated and we obtained the negative amplification degree of -3 for a fiber length of 6 m at room temperature. It has been confirmed that the mechanism of the effect can be explained by calculating the rate equations based on an analytical model for a five-level system of the Er3+ ion. It is suggested that the effect was due to stimulated emission from the 4 S 3/2 level to the 4 I 13/2 level.