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Near-Ballistic Uni-Traveling-Carrier Photodiode- Based V-Band Optoelectronic Mixers With Internal Up-Conversion-Gain, Wide Modulation Bandwidth, and Very High Operation Current Performance

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3 Author(s)
Shi, J.-W. ; Dept. of Electr. Eng., Nat. Central Univ., Taoyuan ; Wu, Y.-S. ; Lin, Y.-S.

We construct a high-performance optoelectronic mixer by integrating a near-ballistic uni-traveling-carrier photodiode with a V-band (50-75 GHz) coplanar-waveguide-based bandpass filter. The demonstrated device shows an improvement in the V-band output radio-frequency (RF) power and conversion loss of around 3 and 10 dB, respectively, over that of the control device, which does not have such an integrated filter. The strong nonlinearity of the ballistic-transport of the electrons in the active device, and the excellent RF performance of the integrated filter help us to achieve an internal-conversion gain of around 1 dB, from the low to very high optical injected local-oscillator power (20.6 dBm), which corresponds to an approximately 17-mA high-output photocurrent, and very wide up-conversion bandwidth (>15 GHz) at the V-band.

Published in:

Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 11 )