Transient microwave bandwidth measurements of illuminated silicon switches for optical pulse-shape control of laser-fusion drivers

Kenton Green; William R. Donaldson; Roman Sobolewski; Andrey V. Okishev; Mark D. Skeldon; Samuel A. Letzring; Wolf D. Seka

doi:10.1117/12.228269

8 December 1995 Transient microwave bandwidth measurements of illuminated silicon switches for optical pulse-shape control of laser-fusion drivers

Kenton Green, William R. Donaldson, Roman Sobolewski, Andrey V. Okishev, Mark D. Skeldon, Samuel A. Letzring, Wolf D. Seka

Author Affiliations +

Proceedings Volume 2633, Solid State Lasers for Application to Inertial Confinement Fusion (ICF); (1995) https://doi.org/10.1117/12.228269
Event: Solid State Lasers for Application to Inertial Confinement Fusion (ICF), 1995, Monterey, CA, United States

Abstract

The microwave transmission properties of a high-purity (greater than or equal to 40 k(Omega) (DOT)cm) single-crystal-silicon, photoconductive (PC) switch were measured while the switch was optically activated. The switch was 2.3 mm wide (the width of the microstrip electrode), 2 mm long, and 0.5 mm thick with a 0.5-mm photoconductive gap and was mounted in a 50-(Omega) microstrip transmission line. The switch was irradiated uniformly with a 150-ns FWHM pulse from a Nd:YAG laser (wavelength equals 1.064 micrometer). The insertion loss of the optically activated PC switch was nearly constant minus 0.7 dB across the measurement system bandwidth (9 GHz). Under these illumination conditions, the switch exhibited negligible bandwidth limitations. The microstrip structure by itself had an insertion loss that increased from minus 0.4 dB at 1 GHz to minus 1.4 dB at 9 GHz.

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Kenton Green, William R. Donaldson, Roman Sobolewski, Andrey V. Okishev, Mark D. Skeldon, Samuel A. Letzring, and Wolf D. Seka "Transient microwave bandwidth measurements of illuminated silicon switches for optical pulse-shape control of laser-fusion drivers", Proc. SPIE 2633, Solid State Lasers for Application to Inertial Confinement Fusion (ICF), (8 December 1995); https://doi.org/10.1117/12.228269

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