A 16 Channel Fibre Laser Sensor Array

Foster, Scott; Tikhomirov, Alexei; Englund, M.; Inglis, Hugh; Edvell, G.; Milnes, M.

doi:10.1364/ofs.2006.fa4

Cited by 15 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The light is confined to the core of a singlemode optical fiber providing a robust optical sensor. The optical pump can be supplied remotely and the fiber laser can be multiplexed using wavelength division multiplexing [28]. The dither current is delivered optically through a separate fiber by converting an intensity modulated optical signal into a current with a large-area photodiode.…”

Section: Discussionmentioning

confidence: 99%

High-resolution distributed-feedback fiber laser dc magnetometer based on the Lorentzian force

Cranch¹,

Flockhart²,

Kirkendall

2009

Meas. Sci. Technol.

View full text Add to dashboard Cite

A low-frequency magnetic field sensor, based on a current-carrying beam driven by the Lorentzian force, is described. The amplitude of the oscillation is measured by a distributed-feedback fiber laser strain sensor attached to the beam. The transduction mechanism of the sensor is derived analytically using conventional beam theory, which is shown to accurately predict the responsivity of a prototype sensor. Excellent linearity and negligible hysteresis are demonstrated. Noise sources in the fiber laser strain sensor are described and thermo-mechanical noise in the transducer is estimated. The prototype sensor achieves a magnetic field resolution of 5 nT Hz for 25 mA of current, which is shown to be close to the predicted thermo-mechanical noise limit of the sensor. The current is supplied optically through a separate optical fiber yielding an electrically passive sensor head.

show abstract

Section: Discussionmentioning

confidence: 99%

High-resolution distributed-feedback fiber laser dc magnetometer based on the Lorentzian force

Cranch¹,

Flockhart²,

Kirkendall

2009

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Then further increment of multiplexing number is limited by the spectral width of the gratings. The above factors are common for WDM fiber laser sensors and the strategies have been employed for interferometrically interrogated laser sensor scheme [9]. …”

Section: B Multiplexing Of the Lasersmentioning

confidence: 99%

“…Similarly to the passive FBG sensors, the laser sensors can be multiplexed at different lasing wavelengths [5]- [8]. A fiber grating laser sensor array consisting of as many as 16 sensing elements have been presented [9]. Further improvement in multiplexing capability is limited by the spectral overlap between adjacent gratings, pump power depletion and the width of gain spectrum, based on the analysis in [5].…”

Section: Introductionmentioning

confidence: 99%

A 16-Element Multiplexed Heterodyning Fiber Grating Laser Sensor Array

Jin¹,

Liang²,

Li³

et al. 2014

J. Lightwave Technol.

View full text Add to dashboard Cite

In this paper, we demonstrate the implementation of a 16-element array of heterodyning fiber grating laser sensors cascaded in a single optical fiber. Each laser consists of a Bragg grating pair inscribed in a short section of Er-doped fiber. The laser offers a RF-domain beat signal between orthogonally polarization modes and can act as a photonic sensor for the measurement of external perturbations, by monitoring the beat frequency. The laser sensors are wavelength multiplexed by inscribing fiber gratings with different pitches, and frequency multiplexed in RF domain by controlling the intracavity birefringence via CO 2 laser side irradiation. The pump power depletion as a result of mode mismatch between the active and passive fibers is a main limitation factor for the multiplexing scale. We can multiplex ten laser sensors at most with a single pump laser with an output power of 130 mW and six more sensors can be multiplexed with an additional pump laser at the other end. The measurement ability of an individual laser sensor can be affected when multiplexed in array, in terms of abrupt frequency jumps and the raised noise level. As a result, the force resolution at 1 kHz is changed from 3 to 6 nN/ √ Hz, and the minimal detectable static force is changed from 68 to 120 μN. This is attributed to the off-resonance grating couplings and the reflections at the splicing points. This effect can be weakened by selecting mode-matching fibers and optimizing grating profiles, or simply using additional optical isolators. where he founded the Institute of Photonics Technology. His current research interests include fiber-optic biochemical sensors, micro/nanofiber optical sensors, polarimetric fiber grating laser sensors, microstructured optical fiber sensors, photonic microwave generators, and photonic components for sensing and telecommunication. He has authored and coauthored more than 160 technical papers and presented more than 10 invited talks at international conferences.He is a Member of IEEE and OSA, served as the General Co-

show abstract

“…Distributed feedback fibre lasers (DFB FL) are compact and can be easily multiplexed to form a laser sensor array [2]. Serial multiplexing architecture allows multiple lasers to be pumped using a single optical source (usually 980nm or 1480nm).…”

Section: Introductionmentioning

confidence: 99%