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Efficient amplification using the /sup 4/F/sub 3/2//spl rarr//sup 4/I/sub 9/2/ transition in Nd-doped silica fiber

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2 Author(s)
Dragic, P.D. ; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA ; Papen, G.C.

Amplification characteristics of the three-level /sup 4/F/sub 3/2//spl rarr//sup 4/I/sub 9/2/ transition in Nd-doped silica glass fiber are investigated under strong signal saturation and high pump power (150 mW). Aluminum codoped Nd-silica fibers exhibit strong superfluorescent behavior in the four-level /sup 4/F/sub 3/2//spl rarr//sup 4/I/sub 11/2/ transition which limits the optical conversion efficiency into the three-level transition. Ge-doped silica fibers do not exhibit this limitation and can efficiently amplify in the three-level transition with current laser-diode pump technology.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 12 )

Date of Publication:

Dec. 1999

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