Optical current sensor technology

Grattan, K.T.V.; Ning, Y.N.

doi:10.1007/978-1-4757-6077-4_7

Cited by 36 publications

(48 citation statements)

References 28 publications

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“…A measurement using an optical spectrum analyzer showed a coherence length of around 8 mm as confirmed by [14]. Since the round-trip length of the external cavity is 3 cm, the feedback is incoherent when it returns to the LD.…”

Section: Methodsmentioning

confidence: 60%

Reading bits on a CD‐ROM without a photodiode

Wishon

Locquet

Mourozeau

et al. 2017

IET Optoelectronics

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Abstract:We demonstrate that the bits of a CD-ROM can be read without a photodiode (PD). A commercial CD-ROM drive was used and left unmodified except a beam splitter was removed which would route the light to a PD. This allowed for the reflected light to be incident on the laser within the laser package itself. By monitoring fluctuations in the voltage across the laser diode (LD) under constant-current injection, it was possible to read and interpret the bits from a spinning CD-ROM.

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Section: Methodsmentioning

confidence: 60%

Reading bits on a CD‐ROM without a photodiode

Wishon

Locquet

Mourozeau

et al. 2017

IET Optoelectronics

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“…We numerically analyzed this PCF structure using a full-vectorial finite element method (FEM) [18]. The sensitivity f, is the ratio of the optical power over the sample area (the holes in PCFs) to the total cross section of the incident beam [19],…”

Section: Table1 Optimized Parameters Of Splicing Different Fibersmentioning

confidence: 99%

Fast response in-line gas sensor using C-type fiber and Ge-doped ring defect photonic crystal fiber

Kassani¹,

Park²,

Jung³

et al. 2013

Opt. Express

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An in-line chemical gas sensor was proposed and experimentally demonstrated using a new C-type fiber and a Ge-doped ring defect photonic crystal fiber (PCF). The C-type fiber segment served as a compact gas inlet/outlet directly spliced to PCF, which overcame previous limitations in packaging and dynamic responses. C-type fiber was prepared by optimizing drawing process for a silica tube with an open slot. Splicing conditions for SMF/C-type fiber and PCF/C-type fiber were experimentally established to provide an all-fiber sensor unit. To enhance the sensitivity and light coupling efficiency we used a special PCF with Ge-doped ring defect to further enhance the sensitivity and gas flow rate. Sensing capability of the proposed sensor was investigated experimentally by detecting acetylene absorption lines.

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“…It is so important because this position refers to the zero value of the OPD and therefore gives information about the measurand. The intensity difference between the central fringe and the first side fringe can be so small that the signal-to--noise ratio required by the system for direct identification of the central fringe should not be much worse than 50 dB, which is difficult to obtain in real optoelectronics systems [1].…”

Section: Spectral Signal Processingmentioning

confidence: 99%

“…where S(ν) -spectral distribution of the light source; V 0 -visibility of the measured signal, ∆φ(ν) -the phase difference between interfering beams [1]. The phase difference between interfering beams can be calculated from a following equation:…”

Section: Spectral Signal Processingmentioning

confidence: 99%

“…In low-coherent fibre-optic interferometric sensors it is possible to use two kinds of optical signal processing: in a phase domain (also known as a temporal) and in a spectral domain. The optical processor can be either a second interferometer (when the phase domain processing of the measured signal is used) or a spectrometer (when the spectral domain processing of the measured signal is used) [1].…”

Section: Introductionmentioning

confidence: 99%

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Low-Coherence Fibre-Optic Interferometric Sensors

Jędrzejewska‐Szczerska

Gnyba

Kosmowski

2011

Acta Phys. Pol. A

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In this paper low-coherence fibre-optic sensors based on the Fabry-Perot and Michelson interferometer, which were designed and elaborated at our laboratory, are shown. We present results of investigation of the fibre-optic sensors working in both configurations. These results allowed us to compare properties of sensors working in both configurations. The theoretical analysis and experimental results made us possible to select best construction, which was implemented in low-coherence fibre-optic sensors of refractive index.

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Optical current sensor technology

Cited by 36 publications

References 28 publications

Reading bits on a CD‐ROM without a photodiode

Reading bits on a CD‐ROM without a photodiode

Fast response in-line gas sensor using C-type fiber and Ge-doped ring defect photonic crystal fiber

Low-Coherence Fibre-Optic Interferometric Sensors

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