Novel analog optical rf E-field sensor system

Andreas Stoehr; Robert Heinzelmann; T. Langer; C. Rheinfelder; W. Heinrich; Thomas Alder; D. Kalinowski; Manuel Schmidt; Matthias Gross; Dieter Jaeger

doi:10.1117/12.330384

3 November 1998 Novel analog optical rf E-field sensor system

Andreas Stoehr, Robert Heinzelmann, T. Langer, C. Rheinfelder, W. Heinrich, Thomas Alder, D. Kalinowski, Manuel Schmidt, Matthias Gross, Dieter Jaeger

Author Affiliations +

Proceedings Volume 3463, Photonics and Radio Frequency II; (1998) https://doi.org/10.1117/12.330384
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

In this paper, the concept of a hybrid integrated optical sensor system for frequency selective electric field measurement will be presented. The sensor system will be applicable to E-field measurement problems up to frequencies in the microwave regime. It will provide minimum interference with the measured electric field, since the detected signal is transferred into the optical domain within the sensor head which is connected to the read-out via EMI free optical fibers. The key components within the sensor head area a planar antenna connected to a 1.55 micrometers InGaAs/InAlAs waveguide electro-absorption (EA) modulator via a low-power transimpedance amplifier based on GaAs MESFET technology. In order to avoid interference with the measured electric field, the transimpedance amplifier is powered by optical means using an array of photovoltaic cells on GaAs substrate for high-efficient power conversion at 850 nm wavelength. Based on numerical and experimental result the key components will be discussed and evaluated for the application within the sensor system. Furthermore, a novel and flexible technique for fiber-chip coupling will be presented, employing the integration of InP V-grooves with the waveguide EA-modulator.

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Andreas Stoehr, Robert Heinzelmann, T. Langer, C. Rheinfelder, W. Heinrich, Thomas Alder, D. Kalinowski, Manuel Schmidt, Matthias Gross, and Dieter Jaeger "Novel analog optical rf E-field sensor system", Proc. SPIE 3463, Photonics and Radio Frequency II, (3 November 1998); https://doi.org/10.1117/12.330384

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