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We demonstrate evanescently-coupled waveguide modified uni-traveling-carrier (MUTC) photodiodes with more than 105 GHz bandwidth. The photodiodes have dark currents as low as nA and deliver RF output powers of 5.1 dBm, 4.4 dBm and 3.5 dBm at 75 GHz, 80 GHz and 90GHz, respectively.
We demonstrate InP-based modified uni-traveling carrier (MUTC) photodiodes (PDs) with top p-contact on silicon-on-insulator (SOI) nano-waveguides. The photodiodes have a low dark current of 10 nA, high internal responsivity of 0.84 A/W and bandwidths up to 35 GHz.
The passive intermodulation (PIM) had rarely caused a concern for the Radio Frequency (RF) compliance testing of licensed wireless systems in the past. But this may change as the broadband LTE (Long-Term Evolution) systems with MIMO (multiple-input and multiple-output) technology are being rolled out nationwide. This article discusses the causes of PIM distortion in RF testing and elaborates on why...
A novel periodic random polarization scrambling scheme that can generate uniformly distributed output SOPs on the Poincarè sphere for any arbitrary input state is proposed and compared with previous approaches. Experimental measurement consisting of 200 samples confirms the uniformity.
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