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Proceedings Paper

Photonic Measurements Of Microwave Pulses
Author(s): William F. Filter; James Chang; Clinton O. Landron; David J. Muron
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Paper Abstract

We have successfully demonstrated a photonic free space microwave frequency sensor at the Sandia High Power Microwave facility. This sensor, which uses the Pockels effect, is a miniature dielectric device that we constructed from electro-optic and fiber-optic components. In this sensor, an incident pulsed microwave electric field modulates a carrier laser beam at the microwave frequency. The depth of modulation is proportional to the field strength. Since the bandwidth of the detected signal exceeds that of conventional transient signal digitizers, we use a prototype High Speed Multichannel Data Recorder that we have developed. This instrument employs a high bandwidth streak camera to record the sensor signal in real time, without the need for downmixing. Because it is small and dielectric, the sensor is non-perturbing. Its input and output leads are fiber-optic and therefore immune to electromagnetic interference. Because the sensor is broadband, we can Fourier transform the pulse and obtain a power spectrum. We discuss the construction and use of this sensor and present data showing the direct recording of a 3 GHz microwave pulse on the High Speed Multichannel Data Recorder. We also discuss the use of multigigahertz analog laser diode transmitters in extending the bandwidth of conventional pulsed microwave diagnostics.

Paper Details

Date Published: 3 January 1986
PDF: 7 pages
Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); doi: 10.1117/12.949795
Show Author Affiliations
William F. Filter, Sandia National Laboratories (United States)
James Chang, Sandia National Laboratories (United States)
Clinton O. Landron, Sandia National Laboratories (United States)
David J. Muron, Sandia National Laboratories (United States)


Published in SPIE Proceedings Vol. 0566:
Fiber Optic and Laser Sensors III
Emery L. Moore; O. Glenn Ramer, Editor(s)

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