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This paper addresses the problem of sweep-based persistent surveillance (SBPS) using multiple Unmanned Aerial Vehicles (UAVs). Due to the variation of priority distributed in the area under surveillance, a novel concept of level-of-interest (LoI) is introduced to represent the relative priorities of the target areas. Inspired by an “age”- related algorithm in literature, we develop a novel recursive...
A 4 by 28.3 to 10 by 11.32 Gb/s SFI-S compliant two chip SerDes for 100 Gb/s applications was fabricated using IBM's SiGe 130 nm 8HP process (210 GHz fT). The Multiplexer receives 10 channels, plus the SFI-S deskew channel at 11.32 Gb/s, and outputs four lanes at 28.3 Gb/s, with a maximum output of 1.2 Vpp differential. The Demultiplexer receives four channels at 28.3 Gb/s, recovers clock and data...
We report recent improvement in absolute frequency measurement of the 115In+5s21S0-5s5p 3P0 clock transition at 236.5 nm. Using a narrowline laser as a local oscillator, a linewidth of 43 Hz for the transition is resolved. The uncertainty of the transition frequency's centroid is 18 Hz, leading to a fractional uncertainty of 1.4 x 10-14. In the experiment, a single 115In+is trapped in a three-ring...
A single indium ion is being trapped and cooled via sideband cooling to its lowest vibrational states.We demonstrate a Hz-level laser system which is capable of measuring the 115In+1S0-3P0 clock transition with high accuracy.
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