论文信息 - MODE-DISCRIMINATING PHOTOCONDUCTOR AND COPLANAR WAVEGUIDE CIRCUIT FOR PICOSECOND SAMPLING

MODE-DISCRIMINATING PHOTOCONDUCTOR AND COPLANAR WAVEGUIDE CIRCUIT FOR PICOSECOND SAMPLING

We introduce a circuit for ultrafast measurements with coplanar waveguide transmission lines. The circuit contains photoconductive switches that allow tunable generation and reception of a coplanar waveguide’s two propagating modes. The circuit has fewer discontinuities than other circuits with similar capabilities and does not require airbridges. We show how the photoconductive switch can be biased to compensate for pump laser beam misalignment, and that a circuit composed of two chips making up a hybrid has only 4% broader temporal resolution than a circuit integrated on a single chip. We measured a minimum temporal resolution of 2.4 ps.

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