Observation of superluminal and slow light propagation in erbium-doped optical fiber
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- 1 January 2006
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 73 (2) , 218-224
- https://doi.org/10.1209/epl/i2005-10371-0
Abstract
We observe both extremely slow and superluminal pulse propagation speeds at room temperature in an erbium-doped fiber (EDF). A signal at 1550 nm is sent through an erbium-doped fiber with varying powers of a 980 nm pump. The degree of signal delay or advancement is found to depend significantly on the pump intensity. We observe a maximum fractional advancement of 0.124 and a maximum fractional delay of 0.089. The effect is demon- strated both for a sinusoidally modulated signal and for Gaussian pulses. The ability to control the sign and magnitude of the pulse velocity could have important implications for applications in photonics.Keywords
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