Electro-optic fiber sensor for amplitude and phase detection of radio frequency electromagnetic fields.

Optics letters · 2006 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 5113

Study snapshot

PublicationOptics letters · 2006

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

We present a miniature fiber-optic electromagnetic field (EMF) sensor that is capable of simultaneously detecting the amplitude and phase of an EMF in the range of 0.1-6 GHz. We focus on magnetic field measurements, since the H-field is more significant in our target applications due its direct relation to the current. The sensor is based on an open optical platform to which various antennas can be attached and contains a radio-frequency amplifier for signal conditioning and a vertical-cavity surface-emitting laser as an electro-optic converter. The millimeter size and the full electrical isolation of the sensor allow EMF detection with minimal disturbance. We have characterized the sensor in the near field of a lambda/2 dipole, a rectangular waveguide, and a microstrip line, and we explain the experimental results with a simple theoretical model confirming the mapped near-field distribution of the investigated field source.

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Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

A miniature fiber-optic EMF sensor is presented that can simultaneously detect amplitude and phase of RF electromagnetic fields in the 0.1–6 GHz range, with emphasis on magnetic (H-field) measurements. The sensor was characterized in the near field of a half-wavelength dipole, a rectangular waveguide, and a microstrip line, and experimental results were explained with a simple theoretical model confirming mapped near-field distributions.

Outcomes measured

Development of a miniature fiber-optic EMF sensor
Simultaneous amplitude and phase detection of RF EMF (0.1–6 GHz)
Magnetic field (H-field) measurement capability
Near-field characterization around RF sources (dipole, waveguide, microstrip)

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "exposure_assessment",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Development of a miniature fiber-optic EMF sensor",
    "Simultaneous amplitude and phase detection of RF EMF (0.1–6 GHz)",
    "Magnetic field (H-field) measurement capability",
    "Near-field characterization around RF sources (dipole, waveguide, microstrip)"
  ],
  "main_findings": "A miniature fiber-optic EMF sensor is presented that can simultaneously detect amplitude and phase of RF electromagnetic fields in the 0.1–6 GHz range, with emphasis on magnetic (H-field) measurements. The sensor was characterized in the near field of a half-wavelength dipole, a rectangular waveguide, and a microstrip line, and experimental results were explained with a simple theoretical model confirming mapped near-field distributions.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "fiber-optic sensor",
    "electro-optic converter",
    "VCSEL",
    "RF electromagnetic fields",
    "amplitude detection",
    "phase detection",
    "magnetic field",
    "H-field",
    "near-field measurement",
    "dipole",
    "rectangular waveguide",
    "microstrip line"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1364/ol.31.002402
PubMed: 16880836

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