Abstract #1333

Implementation of an Optical System for Signal and Power Transmission in Light Coils

Zining Liu¹, Nan Yin¹, Çağlar Ataman², Henning Helmers³, Michael Bock¹, and Ali Caglar Özen¹

¹Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, ²Microsystems for Biomedical Imaging Laboratory, Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany, ³Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

Synopsis

Keywords: New Devices, New Devices, Optics

Motivation: RF-induced heating and reduced image signal-to-noise ratio (SNR) due to crosstalk between adjacent cables are problematic in dense receive arrays. RF coils with fiber-optical connection can overcome these problems associated with metallic wires.

Goal(s): To develop optical signal and power transmission units for MRI.

Approach: An analog photonic link with Mach-Zehnder modulator was constructed for optical signal transmission, and GaAs-based photonic power converters were used for power-over-fiber supply of low-noise-amplifiers (LNA).

Results: Image SNR and signal dynamic range of the photonic link are comparable with coaxial cable connection. Photonic power convertors can supply up to 10 LNAs in the receive chain.

Impact: Fully optical signal and power transmission is feasible for RF coils. It enables extremely dense modular receive arrays by eliminating cable-crosstalk and overcoming RF induced heating problems.

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