Journal
OPTICS COMMUNICATIONS
Volume 413, Issue -, Pages 207-211Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2017.12.057
Keywords
Er3+-doped optical fiber; The time delay; Dual frequency pumping light; Counter-propagation; Co-propagation
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In this paper, a general theory of coherent population oscillation effect in an Er3+ -doped fiber under the dual-frequency pumping laser with counter-propagation and co-propagation at room temperature is presented. Using the numerical simulation, in case of dual frequency light waves (1480 nm and 980 nm) with co-propagation and counter-propagation, we analyze the effect of the pump optical power ratio (M) on the group speed of light. The group velocity of light can be varied with the change of M. We research the time delay and fractional delay in an Er3+-doped fiber under the dual-frequency pumping laser with counter-propagation and co-propagation. Compared to the methods of the single pumping, the larger time delay can be got by using the technique of dual-frequency laser pumped fiber with co-propagation and counter-propagation. (C) 2017 Elsevier B.V. All rights reserved.
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