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Intravascular photoacoustic (IVPA) imaging, which combines the advantages of high ultrasonic resolution and strong optical absorption contrast, seems to be an alternative method to detect lipid pool and atherosclerotic lesion. A highly sensitive miniaturized ultrasound transducer is required for receiving of intravascular photoacoustic signals. As the core part of the transducer, lead-based piezoelectric...
High capacity time division multiplexed passive optical network (TDM-PON) is an emerging fiber access network that deploys optical access lines between a carrier's central office (CO) and a customer sites. In this investigation, we demonstrate and analyze the continuous wave (CW) upstream effect in TDM-PONs.Besides, we also propose and design a protection apparatus in each optical network unit (ONU)...
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