Stable radio frequency dissemination by simple hybrid frequency modulation scheme.

PAPER pubmed Optics letters 2014 Engineering / measurement Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1364/ol.39.005255 PMID: 26466244 Evidence Lab

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.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

unclear

Population

—

Sample size

—

Exposure

RF other · 200 MHz

Evidence strength

Insufficient

Confidence: 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": 0.7399999999999999911182158029987476766109466552734375,
    "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": []
}

AI can be wrong. Always verify against the paper.

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

Comments

No comments yet.