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 simi...

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Veröffentlicht in:Applied physics letters 1999-02, Vol.74 (7), p.1039-1041
Hauptverfasser: Zamdmer, N., Hu, Qing, Verghese, S., Förster, A.
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container_title Applied physics letters
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creator Zamdmer, N.
Hu, Qing
Verghese, S.
Förster, A.
description 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.
doi_str_mv 10.1063/1.123448
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title Mode-discriminating photoconductor and coplanar waveguide circuit for picosecond sampling
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