The demodulation of digital signals in a wireless system can be achieved either as coherent, in which the frequency and phase of the carrier have been previously recovered, or as non-coherent.
PROVIDENCE, R.I. [Brown University] -- Brown University researchers have demonstrated for the first time a method of substantially changing the spatial coherence of light. In a paper published in the ...
The lithium niobate thin-film modulator was designed to achieve a modulation frequency of 350 kHz within the 0–2π phase range, further realizing high speed control of optical field coherence.
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