Measurement of resonant bend loss in anti-resonant hollow core optical fiber

Richard Carter, Fei Yu, William J. Wadsworth, Jonathan D. Shephard, Timothy A. Birks, Jonathan C. Knight, Duncan Paul Hand

Research output: Contribution to journalArticle

Abstract

We present the results of measurements of resonant spectral bend loss using a novel apparatus in a series of hollow core anti-resonant optical fibers, important for their applications in the delivery of industrial power ultra-short laser pulses. The measured bend losses exhibit clear wavelength-bend diameter resonances. We demonstrate, in good agreement with theoretical analysis, that the sensitivity to bend diameter (in terms of minimum bend radii) is dependent on the ratio between cladding and core structure size. By decreasing the cladding capillary diameter : core diameter ratio from 0.70 to 0.43 the minimum bend diameter is decreased from >160 mm to ~ 15 mm at a wavelength of 800 nm. Furthermore it is demonstrated that the exact position of the loss bands is highly dependent on the orientation of the fiber structure with the bend plane.
Original languageEnglish
Pages (from-to)20612-20621
Number of pages10
JournalOptics Express
Volume25
Issue number17
Early online date15 Aug 2017
DOIs
Publication statusPublished - 21 Aug 2017

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hollow
optical fibers
wavelengths
delivery
radii
fibers
sensitivity
pulses
lasers

Keywords

  • fiber characterisation
  • Fiber optics
  • fiber properties
  • Microstructured fibers
  • fiber design and characterisation

Cite this

Carter, Richard ; Yu, Fei ; Wadsworth, William J. ; Shephard, Jonathan D. ; Birks, Timothy A. ; Knight, Jonathan C. ; Hand, Duncan Paul. / Measurement of resonant bend loss in anti-resonant hollow core optical fiber. In: Optics Express. 2017 ; Vol. 25, No. 17. pp. 20612-20621.
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abstract = "We present the results of measurements of resonant spectral bend loss using a novel apparatus in a series of hollow core anti-resonant optical fibers, important for their applications in the delivery of industrial power ultra-short laser pulses. The measured bend losses exhibit clear wavelength-bend diameter resonances. We demonstrate, in good agreement with theoretical analysis, that the sensitivity to bend diameter (in terms of minimum bend radii) is dependent on the ratio between cladding and core structure size. By decreasing the cladding capillary diameter : core diameter ratio from 0.70 to 0.43 the minimum bend diameter is decreased from >160 mm to ~ 15 mm at a wavelength of 800 nm. Furthermore it is demonstrated that the exact position of the loss bands is highly dependent on the orientation of the fiber structure with the bend plane.",
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Measurement of resonant bend loss in anti-resonant hollow core optical fiber. / Carter, Richard; Yu, Fei; Wadsworth, William J.; Shephard, Jonathan D.; Birks, Timothy A.; Knight, Jonathan C.; Hand, Duncan Paul.

In: Optics Express, Vol. 25, No. 17, 21.08.2017, p. 20612-20621.

Research output: Contribution to journalArticle

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T1 - Measurement of resonant bend loss in anti-resonant hollow core optical fiber

AU - Carter, Richard

AU - Yu, Fei

AU - Wadsworth, William J.

AU - Shephard, Jonathan D.

AU - Birks, Timothy A.

AU - Knight, Jonathan C.

AU - Hand, Duncan Paul

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AB - We present the results of measurements of resonant spectral bend loss using a novel apparatus in a series of hollow core anti-resonant optical fibers, important for their applications in the delivery of industrial power ultra-short laser pulses. The measured bend losses exhibit clear wavelength-bend diameter resonances. We demonstrate, in good agreement with theoretical analysis, that the sensitivity to bend diameter (in terms of minimum bend radii) is dependent on the ratio between cladding and core structure size. By decreasing the cladding capillary diameter : core diameter ratio from 0.70 to 0.43 the minimum bend diameter is decreased from >160 mm to ~ 15 mm at a wavelength of 800 nm. Furthermore it is demonstrated that the exact position of the loss bands is highly dependent on the orientation of the fiber structure with the bend plane.

KW - fiber characterisation

KW - Fiber optics

KW - fiber properties

KW - Microstructured fibers

KW - fiber design and characterisation

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