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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).
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