Quadrature phase shift key is a one of the digital modulation schemes that use Phase-shift keying. One popular varient of QPSK is offset QPSK or OQPSK. What is the difference between these two ...
Figure 1 shows a schematic of the experimental set-up as well as the level scheme. A cloud of laser-cooled 85 Rb atoms serves as the nonlinear optical medium, with the probe and coupling beams passing ...
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