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Proof-of-principle coarse WDM transmission over SI-POF is demonstrated employing μLEDs, an APD receiver and PAM modulation. A record aggregate data rate of 11 Gb/s is achieved over 10 m of POF with a BER<10−3.
Feed-forward pre-equalization is investigated to extend the transmission capability of μLED-based links, providing better receiver sensitivities up to 5dB compared with post-equalization. Error-free 2Gb/s free-space VLC over 0.6m is demonstrated using a PAM-4 modulated blue μLED and an APD receiver.
We report a PAM-ECDMA PON system with 2.5-fold performance improvement over the prior NRZ-ECDMA system. Error-free transmission of two channels in an 8-user 25.6 Gb/s aggregate-data-rate PON is achieved in a proof-of-principle demonstration.
The use of an APD-based receiver in a PAM-16 4 Gb/s LED-POF link is shown to provide 10 dB greater link power budget over a PIN photodiode link. Error-free transmission is achieved over 25m SI-POF.
The parametric loudspeaker takes advantage of the non-linearity property of the air to create new frequency sound components, which can be used to reproduce audible sound from the ultrasonic waves generated by the transducer. Compared with the traditional loudspeaker, the audible sound from the transducer of the parametric loudspeaker has very sharp directivity pattern, which makes its possible to...
A mode-locking mechanism by active gain modulation is studied numerically and experimentally. The parameter window for the emission of stable pulse trains was found. Pulses as short as 3 ps (~0.5 pJ) were characterized by second-order autocorrelation.
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