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By using photonic emitters and fast-scanning lasers at 1.55??m wavelengths, we generated very-flat spectra at 75-110GHz with a thirty times faster scanning-rate (35GHz/ms), much lower driving-voltage, and comparable power than those of tunable MMW oscillator.
The generation of optical millimeter-wave with frequency 8-tupling is experimentally demonstrated. 625-Mb/sec QPSK data transmission at 105-GHz (W-band) is achieved for the first time using the millimeter-wave generation technique and direct modulation of a NBUTC-PD.
By integrating near-ballistic uni-traveling-carrier photodiodes with planar W-band bandpass filters, the demonstrated devices under optical local-oscillator and intermediate-frequency signals injection can exhibit high internal up-conversion-gain (14.2 dB) with a high output photocurrent (19 mA) at W-band (100 GHz).
Coherent THz and millimeter waves continuously tunable in the range of 83.1-1642 /spl mu/m (3.61-0.18 THz) are efficiently generated by using ZnGeP/sub 2/ through collinear phase-matched difference-frequency generation. The maximum peak output power can reach 134 W.
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