A Radio-Frequency-over-Fiber link for large-array radio astronomy applications
Juan Mena, Kevin Bandura, Jean-Francois Cliche, Matt Dobbs, Adam, Gilbert, Qing Yang Tang
TL;DR
This paper presents a cost-effective RFoF link prototype for large-array radio astronomy, demonstrating its stability and suitability for the CHIME telescope's analog signal transport.
Contribution
It introduces a novel RFoF link design based on a Fabry-Perot laser for large-array radio astronomy applications.
Findings
Successful implementation of RFoF link in a prototype interferometer
Demonstrated gain and phase stability suitable for radio astronomy
Cost-effective solution for large-array analog signal transport
Abstract
A prototype 425-850 MHz Radio-Frequency-over-Fiber (RFoF) link for the Canadian Hydrogen Intensity Mapping Experiment (CHIME) is presented. The design is based on a directly modulated Fabry-Perot (FP) laser, operating at ambient temperature, and a single-mode fiber. The dynamic performance, gain stability, and phase stability of the RFoF link are characterized. Tests on a two-element interferometer built at the Dominion Radio Astrophysical Observatory for CHIME prototyping demonstrate that RFoF can be successfully used as a cost-effective solution for analog signal transport on the CHIME telescope and other large-array radio astronomy applications
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