Kate Sugden | Aston University (original) (raw)

Papers by Kate Sugden

Research paper thumbnail of Acoustic emission detection using optical fiber based fabry perot sensor and quadrature recombination technique

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009

... Raja P Pappu*, Wei Zhang, Ian Bennion, Kate Sugden PhotonicsResearchGroup, Aston University, ... more ... Raja P Pappu*, Wei Zhang, Ian Bennion, Kate Sugden PhotonicsResearchGroup, Aston University, BirminghamB4 7ET, UK, *pappurp@aston.ac.uk ... Optical fiber based sensors, since they are easy to embed in structures, simple to multiplex and ofsmall weight, are an attractive ...

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Research paper thumbnail of Optimization and Characterization of Femtosecond Laser Inscribed In-Fiber Microchannels for Liquid Sensing

Journal of Lightwave Technology, 2015

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Research paper thumbnail of Characterisation and performance of a Terfenol-D coated femtosecond laser inscribed optical fibre Bragg sensor with a laser ablated microslot for the detection of static magnetic fields

Optics Express

We present a novel device for the characterisation of static magnetic fields through monitoring w... more We present a novel device for the characterisation of static magnetic fields through monitoring wavelength shifts of femtosecond inscribed fibre Bragg grating and micromachined slot, coated with Terfenol-D. The device was sensitive to static magnetic fields and can be used as a vectoral sensor for the detection of magnetic fields as low as 0.046 mT with a resolution of ± 0.3mT in transmission and ± 0.7mT in reflection. The use of a femtosecond laser to both inscribe the FBGs and micromachine the slot in a single stage prior to coating the device significantly simplifies the fabrication.

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Research paper thumbnail of Femtosecond laser inscribed Bragg sensor in Terfenol-D coated optical fibre with ablated microslot for the detection of static magnetic fields

Proceedings of SPIE - The International Society for Optical Engineering

A novel device for the detection and characterisation of static magnetic fields is presented. It ... more A novel device for the detection and characterisation of static magnetic fields is presented. It consists of a femtosecond laser inscribed fibre Bragg grating (FBG) that is incorporated into an optical fibre with a femtosecond laser micromachined slot. The symmetry of the fibre is broken by the micro-slot, producing non-uniform strain across the fibre cross section. The sensing region is coated with Terfenol-D making the device sensitive to static magnetic fields, whereas the symmetry breaking results in a vectorial sensor for the detection of magnetic fields as low as 0.046 mT with a resolution of +/-0.3mT in transmission and +/-0.7mT in reflection. The sensor output is directly wavelength encoded from the FBG filtering, leading to simple demodulation through the monitoring of wavelength shifts that result as the fibre structure changes shape in response to the external magnetic field. The use of a femtosecond laser to both inscribe the FBG and micro-machine the slot in a single st...

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Research paper thumbnail of Very broad reflection bandwidth (44 nm) chirped fibre gratings and narrow bandpass filters produced by the use of an amplitude mask

Electronics Letters, 1994

Chirped gratings with very broad reflection bandwidths up to 44 nm and high reflectivity have bee... more Chirped gratings with very broad reflection bandwidths up to 44 nm and high reflectivity have been produced holographically in boron-codoped and standard telecommunications fibers which have been hydrogen-soaked. A 2 nm wide transmission band has been produced within the broad reflection band by use of an amplitude mask during grating exposure.

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Research paper thumbnail of Parametric study of femtosecond inscription of microstructures for OCT artefact fabrication

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI, 2012

ABSTRACT As optical coherence tomography (OCT) becomes widespread, validation and characterizatio... more ABSTRACT As optical coherence tomography (OCT) becomes widespread, validation and characterization of systems becomes important. Reference standards are required to qualitatively and quantitatively measure the performance between difference systems. This would allow the performance degradation of the system over time to be monitored. In this report, the properties of the femtosecond inscribed structures from three different systems for making suitable OCT characterization artefacts (phantoms) are analyzed. The parameter test samples are directly inscribed inside transparent materials. The structures are characterized using an optical microscope and a swept-source OCT. The high reproducibility of the inscribed structures shows high potential for producing multi-modality OCT calibration and characterization phantoms. Such that a single artefact can be used to characterize multiple performance parameters such the resolution, linearity, distortion, and imaging depths.

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Research paper thumbnail of Fabrication of high aspect ratio microfluidic devices using direct fs ablation

2008 Conference on Lasers and Electro-Optics, 2008

The glass used was Standard BK7 microscope slides of 3mm thickness. The sample was mounted on a j... more The glass used was Standard BK7 microscope slides of 3mm thickness. The sample was mounted on a jig on a 3D stage with the beam delivered through a machining objective on a linear stage. The beam was focused by an air-spaced triplet lens of focal length 66mm an NA of ...

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Research paper thumbnail of Simple design of nonuniform fiber Bragg grating with sharp reflection

2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666), 2003

Abstract In this paper we consider the possibility of using intermediate solutions, in which idea... more Abstract In this paper we consider the possibility of using intermediate solutions, in which ideal apodisation profile for a dispersion-free, sharp-reflection profile fibre Bragg grating approximated in different degrees. The ideal apodisation profile for a flat dispersion, 50 ...

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Research paper thumbnail of Highly thermally responsive hybrid in-fiber slab waveguide grating structure with a plastic core and a silica cladding

2008 Conference on Lasers and Electro-Optics, 2008

ABSTRACT A 1.2(height)×125(depth)×500(length) micro-slot was engraved along a fiber Bragg grating... more ABSTRACT A 1.2(height)×125(depth)×500(length) micro-slot was engraved along a fiber Bragg grating by chemically assisted femtosecond laser processing. By filling epoxy and UV-curing, waveguide with plastic-core and silica-cladding was created, presenting high thermal responding coefficient of 211pm/°C.

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Research paper thumbnail of Tunable dispersion compensator based on three distributed Gires-Tournois etalons

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Research paper thumbnail of Optically Pumped Chirped Grating for Tunable Chromatic Dispersion Compensation

Advanced Photonics & Renewable Energy, 2010

ABSTRACT

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Research paper thumbnail of <title>Photonic skins for optical sensing: highlights of the PHOSFOS Project</title>

20th International Conference on Optical Fibre Sensors, 2009

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Research paper thumbnail of Virtual Gires-Tournois etalons realized with phase-modulated wideband chirped fiber gratings

Optics Letters, 2007

We propose and demonstrate novel virtual Gires-Tournois (GT) etalons based on fiber gratings. By ... more We propose and demonstrate novel virtual Gires-Tournois (GT) etalons based on fiber gratings. By introducing an additional phase modulation in wideband linearly chirped fiber Bragg gratings, we have successfully generated GT resonance with only one grating. This technique can simplify the fabrication procedure while retaining the normal advantages of distributed etalons, including their full compatibility with optical fiber, low insertion loss, and low cost. Such etalons can be used as dispersion compensation devices in optical transmission systems.

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Research paper thumbnail of Compact All-Fiber Femtosecond-Pulse Amplification Circuit

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Research paper thumbnail of Use of in-fiber chirped Bragg gratings in an all-fiber femtosecond-pulse amplification circuit

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Research paper thumbnail of Chirped fiber-Moiré-grating transmission filters

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Research paper thumbnail of Multiwavelength operation of an erbium-doped fiber laser by using in-fiber comb filters

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Research paper thumbnail of High-power picosecond soliton fiber lasers using chirped fiber Bragg gratings

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Research paper thumbnail of Thermal Stability of Uniform-Period, Chirped, and Bandpass Fibre Grating Structures Fabricated in Hydrogenated Optical Fibres

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Research paper thumbnail of Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system

ABSTRACT

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Research paper thumbnail of Acoustic emission detection using optical fiber based fabry perot sensor and quadrature recombination technique

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009

... Raja P Pappu*, Wei Zhang, Ian Bennion, Kate Sugden PhotonicsResearchGroup, Aston University, ... more ... Raja P Pappu*, Wei Zhang, Ian Bennion, Kate Sugden PhotonicsResearchGroup, Aston University, BirminghamB4 7ET, UK, *pappurp@aston.ac.uk ... Optical fiber based sensors, since they are easy to embed in structures, simple to multiplex and ofsmall weight, are an attractive ...

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Research paper thumbnail of Optimization and Characterization of Femtosecond Laser Inscribed In-Fiber Microchannels for Liquid Sensing

Journal of Lightwave Technology, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Characterisation and performance of a Terfenol-D coated femtosecond laser inscribed optical fibre Bragg sensor with a laser ablated microslot for the detection of static magnetic fields

Optics Express

We present a novel device for the characterisation of static magnetic fields through monitoring w... more We present a novel device for the characterisation of static magnetic fields through monitoring wavelength shifts of femtosecond inscribed fibre Bragg grating and micromachined slot, coated with Terfenol-D. The device was sensitive to static magnetic fields and can be used as a vectoral sensor for the detection of magnetic fields as low as 0.046 mT with a resolution of ± 0.3mT in transmission and ± 0.7mT in reflection. The use of a femtosecond laser to both inscribe the FBGs and micromachine the slot in a single stage prior to coating the device significantly simplifies the fabrication.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Femtosecond laser inscribed Bragg sensor in Terfenol-D coated optical fibre with ablated microslot for the detection of static magnetic fields

Proceedings of SPIE - The International Society for Optical Engineering

A novel device for the detection and characterisation of static magnetic fields is presented. It ... more A novel device for the detection and characterisation of static magnetic fields is presented. It consists of a femtosecond laser inscribed fibre Bragg grating (FBG) that is incorporated into an optical fibre with a femtosecond laser micromachined slot. The symmetry of the fibre is broken by the micro-slot, producing non-uniform strain across the fibre cross section. The sensing region is coated with Terfenol-D making the device sensitive to static magnetic fields, whereas the symmetry breaking results in a vectorial sensor for the detection of magnetic fields as low as 0.046 mT with a resolution of +/-0.3mT in transmission and +/-0.7mT in reflection. The sensor output is directly wavelength encoded from the FBG filtering, leading to simple demodulation through the monitoring of wavelength shifts that result as the fibre structure changes shape in response to the external magnetic field. The use of a femtosecond laser to both inscribe the FBG and micro-machine the slot in a single st...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Very broad reflection bandwidth (44 nm) chirped fibre gratings and narrow bandpass filters produced by the use of an amplitude mask

Electronics Letters, 1994

Chirped gratings with very broad reflection bandwidths up to 44 nm and high reflectivity have bee... more Chirped gratings with very broad reflection bandwidths up to 44 nm and high reflectivity have been produced holographically in boron-codoped and standard telecommunications fibers which have been hydrogen-soaked. A 2 nm wide transmission band has been produced within the broad reflection band by use of an amplitude mask during grating exposure.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Parametric study of femtosecond inscription of microstructures for OCT artefact fabrication

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI, 2012

ABSTRACT As optical coherence tomography (OCT) becomes widespread, validation and characterizatio... more ABSTRACT As optical coherence tomography (OCT) becomes widespread, validation and characterization of systems becomes important. Reference standards are required to qualitatively and quantitatively measure the performance between difference systems. This would allow the performance degradation of the system over time to be monitored. In this report, the properties of the femtosecond inscribed structures from three different systems for making suitable OCT characterization artefacts (phantoms) are analyzed. The parameter test samples are directly inscribed inside transparent materials. The structures are characterized using an optical microscope and a swept-source OCT. The high reproducibility of the inscribed structures shows high potential for producing multi-modality OCT calibration and characterization phantoms. Such that a single artefact can be used to characterize multiple performance parameters such the resolution, linearity, distortion, and imaging depths.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fabrication of high aspect ratio microfluidic devices using direct fs ablation

2008 Conference on Lasers and Electro-Optics, 2008

The glass used was Standard BK7 microscope slides of 3mm thickness. The sample was mounted on a j... more The glass used was Standard BK7 microscope slides of 3mm thickness. The sample was mounted on a jig on a 3D stage with the beam delivered through a machining objective on a linear stage. The beam was focused by an air-spaced triplet lens of focal length 66mm an NA of ...

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Research paper thumbnail of Simple design of nonuniform fiber Bragg grating with sharp reflection

2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666), 2003

Abstract In this paper we consider the possibility of using intermediate solutions, in which idea... more Abstract In this paper we consider the possibility of using intermediate solutions, in which ideal apodisation profile for a dispersion-free, sharp-reflection profile fibre Bragg grating approximated in different degrees. The ideal apodisation profile for a flat dispersion, 50 ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Highly thermally responsive hybrid in-fiber slab waveguide grating structure with a plastic core and a silica cladding

2008 Conference on Lasers and Electro-Optics, 2008

ABSTRACT A 1.2(height)×125(depth)×500(length) micro-slot was engraved along a fiber Bragg grating... more ABSTRACT A 1.2(height)×125(depth)×500(length) micro-slot was engraved along a fiber Bragg grating by chemically assisted femtosecond laser processing. By filling epoxy and UV-curing, waveguide with plastic-core and silica-cladding was created, presenting high thermal responding coefficient of 211pm/°C.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Tunable dispersion compensator based on three distributed Gires-Tournois etalons

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Optically Pumped Chirped Grating for Tunable Chromatic Dispersion Compensation

Advanced Photonics & Renewable Energy, 2010

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of <title>Photonic skins for optical sensing: highlights of the PHOSFOS Project</title>

20th International Conference on Optical Fibre Sensors, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Virtual Gires-Tournois etalons realized with phase-modulated wideband chirped fiber gratings

Optics Letters, 2007

We propose and demonstrate novel virtual Gires-Tournois (GT) etalons based on fiber gratings. By ... more We propose and demonstrate novel virtual Gires-Tournois (GT) etalons based on fiber gratings. By introducing an additional phase modulation in wideband linearly chirped fiber Bragg gratings, we have successfully generated GT resonance with only one grating. This technique can simplify the fabrication procedure while retaining the normal advantages of distributed etalons, including their full compatibility with optical fiber, low insertion loss, and low cost. Such etalons can be used as dispersion compensation devices in optical transmission systems.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Compact All-Fiber Femtosecond-Pulse Amplification Circuit

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Use of in-fiber chirped Bragg gratings in an all-fiber femtosecond-pulse amplification circuit

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chirped fiber-Moiré-grating transmission filters

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Multiwavelength operation of an erbium-doped fiber laser by using in-fiber comb filters

Bookmarks Related papers MentionsView impact

Research paper thumbnail of High-power picosecond soliton fiber lasers using chirped fiber Bragg gratings

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Thermal Stability of Uniform-Period, Chirped, and Bandpass Fibre Grating Structures Fabricated in Hydrogenated Optical Fibres

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system

ABSTRACT

Bookmarks Related papers MentionsView impact