Photonic Measurements Of Microwave Pulses

William F. Filter; James Chang; Clinton O. Landron; David J. Muron

doi:10.1117/12.949795

3 January 1986 Photonic Measurements Of Microwave Pulses

William F. Filter, James Chang, Clinton O. Landron, David J. Muron

Proceedings Volume 0566, Fiber Optic and Laser Sensors III; (1986) https://doi.org/10.1117/12.949795
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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.

Citation Download Citation

William F. Filter, James Chang, Clinton O. Landron, and David J. Muron "Photonic Measurements Of Microwave Pulses", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); https://doi.org/10.1117/12.949795

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