Volume 73, Number 2, January 2006
|Page(s)||218 - 224|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||02 December 2005|
Observation of superluminal and slow light propagation in erbium-doped optical fiber
The Institute of Optics, University of Rochester - Rochester, NY 14627, USA
2 San Francisco State University - San Francisco, CA 94132, USA
3 The United States Air Force Academy - Colorado Springs, CO 80840, USA
4 Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Zaragoza Pedro Cerbuna 12, 50009 Zaragoza, Spain
Accepted: 9 November 2005
We observe both extremely slow and superluminal pulse propagation speeds at room temperature in an erbium-doped fiber (EDF). A signal at 1550 is sent through an erbium-doped fiber with varying powers of a 980 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 demonstrated 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.
PACS: 42.65.-k – Nonlinear optics / 42.81.Dp – Propagation, scattering, and losses; solitons
© EDP Sciences, 2006
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