Phase-sensitive radio-frequency magnetic probe using laser diode and optical fiber

Hayashi, Kenichi; Arai, Kazuo; Ida, Y.

doi:10.1109/jlt.1987.1075596

Cited by 3 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The probe was able to detect a lower strength magnetic field estimated to be 2 nA cm −1 , corresponding to the equivalent far-field power density of ∼1 fW cm −2 . These values could be compared with detected values just reported in the literature as 10 μA cm −1 and 38 nW cm −2 but at the operation frequency of 50 MHz [1]. Hence, one can estimate that the magnetic near field can be detected with an amplitude around 5000 times lower than those reported in [1], but in the present case with a lower resonance frequency of 2.515 MHz.…”

Section: Dynamic Range and Sensitivity Measurementssupporting

confidence: 78%

“…Optoelectronic probes for monitoring electric and magnetic fields have been developed since the 1980s. Their antennas generate RF currents thus modulating LDs [1,2] and LEDs [3,4]. For linear operation and a large efficiency of these systems, there is a need to apply a bias current [4] on the optical sources.…”

Section: Introductionmentioning

confidence: 99%

“…Optoelectronic probes are useful or potentially useful in many applications covering the monitoring at low to high electromagnetic frequencies as near-field characterization of antennas [1,4] and high-frequency circuits [6], electromagnetic pollution due to radio and TV-diffusion as well other wireless services [7], interference due to broadband power line (1.7-80 MHz) in radio communications [8], remote link between antennas and AM or HF-band radio devices [9,10], medical treatment for hyperthermia [11], energy transmission lines (50/60 Hz) [12], fast transients from electrostatic discharges (ESD) [13], multiple radio signals in military ships [5], etc.…”

Section: Introductionmentioning

confidence: 99%

“…The conventional electromagnetic [15] or the (older) optoelectronic probes [1,3,4] generally can only measure the electric/magnetic field average amplitude or the Poynting vector magnitude. Most of such devices rectify the signal (dc conversion), e.g.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An optoelectronic probe with loss compensation for electromagnetic monitoring at low frequencies

Ribeiro¹,

Xavier²,

Souza³

et al. 2009

Meas. Sci. Technol.

View full text Add to dashboard Cite

We explore the development of an optoelectronic probe for MF/HF/VHF (up to ∼ 37 MHz) radio frequency bands able to display the complete waveforms. It was built from simple, low cost and robust components. A passive loop antenna generates RF current which modulates an ultra-bright LED of display/illumination. The light signals are transmitted along a PMMA plastic optical fibre (POF) to an optical receiver placed in a remote site. All characterization measurements were carried out in the near-field region. Far-field radio transmissions could also be detected. The probe presented at 0.5 MHz tuning-band has shown a 62 dBµV dynamic range and was able to detect down to Hmin ∼ 0.8 nA cm−1 magnetic field amplitude. A new technique for loss compensation of the fibre link is proposed and successfully tested.

show abstract

Section: Dynamic Range and Sensitivity Measurementssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An optoelectronic probe with loss compensation for electromagnetic monitoring at low frequencies

Ribeiro¹,

Xavier²,

Souza³

et al. 2009

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…As sondas optoeletrônicas receptoras de campos elétricos ou magnéticos têm sido desenvolvidas desde os anos 80 de forma que as respectivas antenas geram correntes capazes de modular diodos laser [5,6]…”

unclassified

Desenvolvimento de Uma Sonda Optoeletrônica Ressonante Para Sinais Eletromagnéticos até VHF Visando Aplicações em Telecomunicações

Ribeiro¹,

Xavier²,

Souza³

et al. 2008

Anais Do XXVI Simpósio Brasileiro De Telecomunicações

View full text Add to dashboard Cite

Resumo -Este trabalho descreve pela primeira vez o desenvolvimento experimental de uma sonda optoeletrônica de sinais de rádio na faixa MF/HF/VHF que mostra o formato de onda completo. Uma antena loop ressonante, passiva e sintonizável, alimenta um LED ultra-brilhante que é modulado pela corrente em RF gerada. O sinal luminoso é enviado por fibra óptica plástica (POF) de PMMA para um receptor óptico remoto. As medidas são feitas em campo-próximo. A sonda não-calibrada apresenta 47,7 dB µ µ µ µV de faixa dinâmica. Uma técnica de compensação da variação da atenuação do enlace em até 5,5 dB é proposta e testada com sucesso. Palavras-chave -Antena loop, fibra óptica plástica, MF/HF/VHF, LED, sonda eletromagnética.

show abstract

An electro-optic probe for ship EMC applications

Li¹,

Pappert²,

Orazi³

et al.

Proceedings of International Symposium on Electromagnetic Compatibility

View full text Add to dashboard Cite

This paper describes a photonic-based electromagnetic (EM) field measurement system developed for shipboard use. The system is operable from 2 MHz to beyond 18 GHz. The small probe size and alldielectric fiber-optic cabling of the electro-optic (EO) probe allows for non-intrusive ultrawideband shipboard EMC measurements to be performed. These EMC measurements are useful for a number of Navy electromagnetic compatibiljty (EMC) applications requiring frequency, amplitude, and phase information. These applications include determining and verifying shipboard emission control status for tactical security, monitoring radiation hazards to personnel, ordnance, and fuel at key locations aboard ship, providing inputs for a real-time electromagnetic interference (EMI) management system, and monitoring the signal quality of individual shipboard emitters. I. BACKGROUNDBroaband electromagnetic field sensing using EO and fiber-optic techniques has been of interest to the Navy since the first fiber-optic link demonstration in the late 1960s. Continual advances in photonic technology over the years has now made this application practical. Previous work in this area has considered antenna-coupled lithium niobate bulk crystal and integrated optical modulators (IOMs), where high sensitivities have been attained for system bandwidths below 1 GHz [l--31. Recent work in this area includes integrated optical versions of the EM field sensing probe [4].The class of field sensor that uses an IOM for the RF electrical-to-optical conversion is referred to here as an externally modulated field monitoring system. An alternative EO field sensing approach has focused on the directcurrent modulation of an antenna-coupled, high-speed-injection laser diode [5, 61. This approach is referred to here as a directly modulated field monitoring system. Both approaches use analog fiber.-optic links to transmit the electromagnetic environment (EME) information to a remote processing site. Directly modulated, short-haul, fiber-optic systems possess a simpler design and are easier to implement, whereas extcrnally modulated systems have been shown to be more sensitive and possess larger 3-dBe bandwidths [7, 81. This paper emphasizes the externally modulated EO EME monitoring system because of its superior performance and its better suitability of meeting ultrawideband shipboard EMC requirements. SYSTEM DESCRIPTIONA schematic diagram of an antenna-coupled e rternally modulated EO EME monitoring system in its simplest form is shown in figure 1. Its primary components include a high-power, low-noise, polarized laser source, polarization-maintaining single-mode optical fiber (PMF) for the uplink, a calibrated wideband antenna electrically couplecl to an IOM, standard single-mode fiber (SMF) for the downlink, a high-speed photodiode, and a signal processor. The signal processor consists of a wideband spectrum analyzer interfaced to a desktop computer. The compact antenna and IOM are positioned at a selected point about the ship for EM field detection, while amplitu...

show abstract

Phase-sensitive radio-frequency magnetic probe using laser diode and optical fiber

Cited by 3 publications

References 5 publications

An optoelectronic probe with loss compensation for electromagnetic monitoring at low frequencies

An optoelectronic probe with loss compensation for electromagnetic monitoring at low frequencies

Desenvolvimento de Uma Sonda Optoeletrônica Ressonante Para Sinais Eletromagnéticos até VHF Visando Aplicações em Telecomunicações

An electro-optic probe for ship EMC applications

Contact Info

Product

Resources

About