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Optically phase-shifted SSB modulation is demonstrated using the third-order optical Hilbert transformer of Mach-Zehnder interferometers. The results verify the principle of the optically phase-shifted SSB scheme which is applicable for high-speed transmission with bandwidth efficiency.
Using resonant SHG effect and a novel spectroscopic technique which utilizes a phase-locked laser pulse pair, we have investigated the dynamical behavior of 2P excitons. The interferogram of exciton polarization has a tail of a few picoseconds. Beating structure was observed in decaying profile. This structure can be explained by polarization interference between the heavy- and light-hole excitons...
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