Researchers have published findings on newly observed challenges of using ‘twisted’ light as a form of wireless, high-capacity data transmission in urban environments that could one day render fibre-optical communication obsolete
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Measuring optical signals in the femtowatt (10-15) to nanowatt (10-9) range can be a daunting task. In order to achieve significant improvements in noise rejection we need to turn to a lock-in amplifier, which can improve noise rejection by 3 orders of magnitude or more.
Researchers at the University of Sydney have produced a photonic microchip that slows down the transmission of digital information by converting light signals into acoustic waves