RF Safe

Stable radio frequency dissemination by simple hybrid frequency modulation scheme.

Optics letters · 2014 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3001

The authors propose a fiber-based radio frequency transfer system using a hybrid frequency modulation scheme combining two RF signals on one laser diode. Experimentally, they report transfer of a stable 200 MHz signal over 100 km optical fiber using a 1 GHz d…

Study snapshot

PublicationOptics letters · 2014
Study typeengineering
Reported directionUnclear
Evidence ratingInsufficient

Abstract

In this Letter, we propose a fiber-based stable radio frequency transfer system by a hybrid frequency modulation scheme. Creatively, two radio frequency signals are combined and simultaneously transferred by only one laser diode. One frequency component is used to detect the phase fluctuation, and the other one is the derivative compensated signal providing a stable frequency for the remote end. A proper ratio of the frequencies of the components is well maintained by parameter m to avoid interference between them. Experimentally, a stable 200 MHz signal is transferred over 100 km optical fiber with the help of a 1 GHz detecting signal, and fractional instability of 2×10(-17) at 10(5) s is achieved.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
ExposureRF · 200 MHz
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

The authors propose a fiber-based radio frequency transfer system using a hybrid frequency modulation scheme combining two RF signals on one laser diode. Experimentally, they report transfer of a stable 200 MHz signal over 100 km optical fiber using a 1 GHz detecting signal, achieving fractional instability of 2×10(-17) at 10^5 s.

Outcomes measured

  • Stability of radio frequency transfer over optical fiber
  • Fractional frequency instability
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "other",
    "frequency_mhz": 200,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Stability of radio frequency transfer over optical fiber",
    "Fractional frequency instability"
  ],
  "main_findings": "The authors propose a fiber-based radio frequency transfer system using a hybrid frequency modulation scheme combining two RF signals on one laser diode. Experimentally, they report transfer of a stable 200 MHz signal over 100 km optical fiber using a 1 GHz detecting signal, achieving fractional instability of 2×10(-17) at 10^5 s.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radio frequency transfer",
    "optical fiber",
    "hybrid frequency modulation",
    "phase fluctuation detection",
    "frequency stability",
    "200 MHz",
    "1 GHz",
    "fractional instability"
  ],
  "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.39.005255
PubMed: 26466244

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