The University of Southampton

Honeywell International Inc.

Saudi Arabian Oil Company

Francesco Poletti

David John Richardson

Gregory Teofil Jasion

John Richard Hayes

Natalie Wheeler

Sameeh Issa Batarseh

David Neil Payne

Damian Pablo San Roman Alerigi

Yong Chen

Eric Rodrigue Numkam Fokoua

Thomas David Bradley

Austin Acker Taranta

Hesham Sakr

Hans Christian Hansen Mulvad

Shaif-ul Alam

Lin Xu

Callum Smith

Seyedmohammad Abokhamis Mousavi

Eric Numkam Fokoua

Austin Taranta

Leonard George Budd

Seyed Mohammad Abokhamis Mousavi

Eric Numkam-Fokoua

Peter Shardlow

Eric Rodrigue Numakm Fokoua

Marco Petrovich

Mubassira B Syed Nawazuddin

Natalie Violet Wheeler

Techniques are provided for controlling azimuthal alignment of a cross-section of the anti-resonant hollow core fiber when winding such anti-resonant hollow core fiber into a coil.

Techniques for azimuthally aligning a cross-section of an anti-resonant hollow core fiber when winding such fiber into a coil

An anti-resonant hollow-core fiber comprising a first tubular, cladding element which defines an internal cladding surface, a plurality of second tubular elements which are attached to the cladding surface and together define a core with an effective radius, the second tubular elements being arranged in spaced relation and adjacent ones of the second tubular elements having a spacing therebetween, and a plurality of third tubular elements, each nested within a respective one of the second tubular elements.

Hollow-core optical fibers

A method of making an optical fibre preform comprising providing a hollow outer tube of glass, providing a hollow primary capillary tube of glass with an outer diameter smaller than an inner diameter of the outer tube, positioning the primary capillary tube inside the outer tube such that an outer surface of the primary capillary tube lies against an inner surface of the outer tube along a contact line parallel to the longitudinal axes of the primary capillary tube and the outer tube, and bonding the primary capillary tube into its position inside the outer tube by directing a laser beam onto a surface of the outer tube or the primary capillary at one or more locations aligned with the contact line.

Method for fabricating an optical fibre preform

An interferometric optical fibre sensor comprises optical fibre defining an optical circuit configured to propagate a first optical wave via an environment in which the optical fibre can be exposed to a stimulus that modifies the first optical wave, and a second optical wave, and to combine the first optical wave and the second optical wave to create an interference signal containing information about the stimulus, wherein optical fibre propagating either or both of the first optical wave and the second optical wave comprises hollow core optical fibre configured to propagate the optical wave or waves by an antiresonant optical guidance effect.

Interferometric fibre optic gyroscopes using hollow core optical fibre and methods thereof

A shaped tube () for use as a component in the fabrication of an antiresonant hollow core optical fibre, the shaped tube having a side wall with a transverse cross-sectional shape comprising a number of major curved portions () alternating with the same number of minor substantially straight portions (), each curved portion () having an inwardly curving shape, and each straight portion () being equidistant from a central longitudinal axis of the shaped tube ().

Antiresonant hollow core fibre, preform therefor and method of fabrication

A hollow core optical fibre comprises a tubular jacket; a cladding comprising a plurality of primary capillaries spaced apart from one another in a ring and each bonded to an inner surface of the jacket at a peripheral location around the circumference of the jacket; and a hollow core formed by a central void within the ring of primary capillaries; wherein the cladding further comprises, within each primary capillary, two secondary capillaries and no more, the two secondary capillaries spaced apart from one another and each bonded to an inner surface of the primary capillary at an azimuthal location around the circumference of the primary capillary which is displaced from the peripheral location of the primary capillary.

Hollow core optical fibre

An optical fiber has corrugations on an outer surface to dissipate a portion of an input light beam, allowing the remaining portion of the light beam to be coupled to the optical fiber. By dissipating the portion of input light, damage to the optical fiber by uncoupled light is reduced.

Optical fiber with corrugations

A nested anti-resonant nodeless hollow core fiber (NANF) enables transmission of multi-kilowatt, continuous wave (CW) light beams operating in wavelengths between 1050 nm and 1100 nm provided by single mode lasers. Such a NANF has little loss over kilometer ranges, and can be employed in long distance subsurface applications, such as in the petroleum industry.

Nested anti-resonant nodeless optical fiber and subsurface system using the same

Resonant fibre optic gyroscopes using hollow core optical fibre and methods thereof

A hollow core photonic bandgap optical fibre comprises: a cladding comprising capillaries in a hexagonal array and a hollow core formed by excluding a hexagonal group of nineteen capillaries from the centre of the hexagonal array. The core is inflated. A core size ratio is 1.26 or above, defined as a ratio of the core diameter to the cladding diameter normalized to the ratio of the core diameter to the cladding diameter in an undistorted hexagonal array; a first ring ratio is between 0.55 and 2.50, defined as a ratio of the length of radially aligned struts separating the capillaries of the first ring to the length of a strut in an undistorted hexagonal array; and a core node spacing is between 0.60 and 1.90, where defined as a ratio of a strut length around the core of a largest corner capillary and a strut length around the core of a smallest side capillary. The fabrication method comprises four different pressures for the core, corner capillary, side capillary and cladding.

Hollow core photonic bandgap optical fibres and methods of fabrication

A preform () for an antiresonant hollow core optical fibre comprises an outer jacket tube () having an inner surface and a central longitudinal axis (); a plurality of antiresonant cladding tubes () spaced apart at predefined peripheral locations around the inner surface of the outer jacket tube (), each antiresonant cladding tube () in contact with the inner surface such that a central longitudinal axis () of each antiresonant cladding tube () is at a first radial distance from the central longitudinal axis () of the outer jacket tube (); and a plurality of spacing elements () disposed alternately with the antiresonant cladding tubes () and each in contact with an outer surface of each of two adjacent antiresonant cladding tubes () at one or more contact points (), the contact points () at a second radial distance from the central longitudinal axis () of the outer jacket tube (), the second radial distance being greater than the first radial distance.

Antiresonant hollow core preforms and optical fibres and methods of fabrication

A method of fabricating a hollow-core photonic-bandgap fiber, comprising the steps of: providing a stack of capillaries, wherein the stack has a hollow core and the capillaries at a boundary of the core comprise a plurality of first, corner core capillaries and a plurality of second, intermediate core capillaries; applying a pressure differential between the corner core capillaries and the intermediate core capillaries, whereby a size of the corner core capillaries can be controlled in relation to the intermediate core capillaries; and reducing the stack to a fiber, wherein the fiber has a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities.

Hollow-core photonic bandgap fibers and methods of manufacturing the same

A hollow-core photonic bandgap fiber having a hollow core and a cladding which surrounds the core at a core boundary and comprises a lattice or network of struts and interstitial nodes which together define an array of cavities, wherein a ratio between a difference in a length of a longest and shortest pitch spacing of the nodes at the core boundary to an average pitch spacing at the core boundary is less than about 0.3.

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Southampton, United Kingdom

Francesco Poletti