High-speed properties of a phase-modulation scheme based on electromagnetically induced transparency.
- 1 July 1998
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 23 (13) , 1007-1009
- https://doi.org/10.1364/ol.23.001007
Abstract
Recently a cross-phase modulation scheme that yields giant Kerr nonlinearities by use of an electromagnetically induced transparency (EIT) was proposed [Schmidt and Imamoglu, Opt. Lett. 21, 1936 (1996)]. We analyze the high-speed properties of this scheme for short-pulse propagation. We discuss the relevant losses in this system and show that for short pulses one-photon losses are dominant. We demonstrate that over the entire bandwidth the attainable phase shift in an EIT scheme with a quasi-cw coupling field is orders of magnitude higher than in a conventional three-level scheme or in EIT schemes, in which matched pulses are used to create the transparency.Keywords
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