A fiber-mounted, micromachined photoconductive probe with 15 nV/Hz1/2 sensitivity | Zendy

R. Lai | Zendy; Jiunn-Ren Hwang | Zendy; J. Nees | Zendy; Theodore B. Norris | Zendy; J.F. Whitaker | Zendy

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A fiber-mounted, micromachined photoconductive probe with 15 nV/Hz1/2 sensitivity

Author(s) -

R. Lai,

Jiunn-Ren Hwang,

J. Nees,

Theodore B. Norris,

J.F. Whitaker

Publication year - 1996

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.117452

Subject(s) - materials science , photoconductivity , optoelectronics , optical fiber , picosecond , laser , detector , electronic circuit , optics , sensitivity (control systems) , electronic engineering , electrical engineering , physics , engineering

We report the performance of a micromachined, photoconductive‐sampling probe that is fabricated on low‐temperature‐grown GaAs and mounted on a single‐mode optical fiber. The epitaxial probe has a temporal resolution of 3.5 ps, a spatial resolution of 7 μm, and a sensitivity of 15 nV/(Hz)1/2 when integrated with a high impedance, junction field‐effect transistor source follower. The fiber, which couples short laser pulses to the interdigitated detector pattern on the probe, also provides flexible support and mobility. The probe’s compact cross section makes it ideal for applications as an internal‐node, picosecond‐response, photoconductive sampling probe or wave form launcher for test and characterization of integrated circuits. © 1996 American Institute of Physics

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