Group Velocity Reduction of Light Pulses in Photorefractive Two-Wave Mixing
ZHANG Guo-Quan, DONG Rong, XU Jing-Jun
Photonics Research Center, College of Physical Science, Nankai
University, Tianjin 300071
Institute of Applied Physics, TEDA College, Nankai University, Tianjin 300457
Group Velocity Reduction of Light Pulses in Photorefractive Two-Wave Mixing
ZHANG Guo-Quan;DONG Rong;XU Jing-Jun
Photonics Research Center, College of Physical Science, Nankai
University, Tianjin 300071
Institute of Applied Physics, TEDA College, Nankai University, Tianjin 300457
Abstract： We show theoretically that the group velocity of light pluses can be reduced significantly by use of the steep dispersion properties of the phase coupling effect in the photorefractive two-wave mixing process. The group velocity of light pulses of the order of 0.1m/s can be achieved in typical photorefractive BSO crystals with an appropriate externally applied electric field and moving gratings of appropriate speeds. It is also shown that the slowly propagating light pulses can be set to be amplified after passing through the photorefractive material.
2003, Vol. 20 
