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Nondestructive measurement of the roughness of the inner surface of hollow core-photonic bandgap fibers

Nondestructive measurement of the roughness of the inner surface of hollow core-photonic bandgap fibers
Nondestructive measurement of the roughness of the inner surface of hollow core-photonic bandgap fibers
We present optical and atomic force microscopy measurements of the roughness of the core wall surface within a hollow core photonic bandgap fiber (HC-PBGF) over the [3×10-2 µm-1 to 30 µm-1] spatial frequency range. A recently developed immersion optical profilometry technique with picometer-scale sensitivity was used to measure the roughness of air-glass surfaces inside the fiber at unprecedentedly low spatial frequencies, which are known to have the highest impact on HC-PBGF scattering loss and, thus, determine their loss limit. Optical access to the inner surface of the core was obtained by the selective filling of the cladding holes with index matching liquid using techniques borrowed from micro-fluidics. Both measurement techniques reveal ultralow roughness levels exhibiting a 1/f spectral power density dependency characteristic of frozen surface capillary waves over a broad spatial frequency range. However, a deviation from this behavior at low spatial frequencies was observed for the first time, to the best of our knowledge.
0146-9592
5086-5089
Buet, Xavier
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Brun, Coralie
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Gateau, Jerome
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Bresson, Bruno
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Sandoghchi, Seyed Reza
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Numkam Fokoua, Eric
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Petrovich, Marco
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Poletti, Francesco
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Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Vandembroucq, D.
c55eb216-82ad-4c68-8c50-f8121d8de5dc
Tessier, Gilles
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Buet, Xavier
e055af76-88ee-410c-95a7-60b4932d382f
Brun, Coralie
04e30e3b-001d-4270-a648-843820955215
Gateau, Jerome
02a062c1-24cc-4307-9638-7f6d0fce0a0f
Bresson, Bruno
113fa353-11b8-48e8-ad1f-66a2708f5d16
Sandoghchi, Seyed Reza
15499707-d3f2-42f1-90e2-cbe260462487
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Petrovich, Marco
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Vandembroucq, D.
c55eb216-82ad-4c68-8c50-f8121d8de5dc
Tessier, Gilles
600b2d2f-7472-4966-9567-4ce9998c01ce

Buet, Xavier, Brun, Coralie, Gateau, Jerome, Bresson, Bruno, Sandoghchi, Seyed Reza, Numkam Fokoua, Eric, Petrovich, Marco, Poletti, Francesco, Richardson, David, Vandembroucq, D. and Tessier, Gilles (2016) Nondestructive measurement of the roughness of the inner surface of hollow core-photonic bandgap fibers. Optics Letters, 41 (21), 5086-5089. (doi:10.1364/OL.41.005086). (PMID:27805692)

Record type: Article

Abstract

We present optical and atomic force microscopy measurements of the roughness of the core wall surface within a hollow core photonic bandgap fiber (HC-PBGF) over the [3×10-2 µm-1 to 30 µm-1] spatial frequency range. A recently developed immersion optical profilometry technique with picometer-scale sensitivity was used to measure the roughness of air-glass surfaces inside the fiber at unprecedentedly low spatial frequencies, which are known to have the highest impact on HC-PBGF scattering loss and, thus, determine their loss limit. Optical access to the inner surface of the core was obtained by the selective filling of the cladding holes with index matching liquid using techniques borrowed from micro-fluidics. Both measurement techniques reveal ultralow roughness levels exhibiting a 1/f spectral power density dependency characteristic of frozen surface capillary waves over a broad spatial frequency range. However, a deviation from this behavior at low spatial frequencies was observed for the first time, to the best of our knowledge.

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Accepted/In Press date: 6 October 2016
e-pub ahead of print date: 31 October 2016
Published date: 31 October 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 401867
URI: https://eprints.soton.ac.uk/id/eprint/401867
ISSN: 0146-9592
PURE UUID: e9008c54-61ac-475d-a5dd-0fba3c3b124d
ORCID for Seyed Reza Sandoghchi: ORCID iD orcid.org/0000-0003-2196-3167
ORCID for Eric Numkam Fokoua: ORCID iD orcid.org/0000-0003-0873-911X
ORCID for Marco Petrovich: ORCID iD orcid.org/0000-0002-3905-5901
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 24 Oct 2016 14:50
Last modified: 12 Nov 2019 06:27

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Contributors

Author: Xavier Buet
Author: Coralie Brun
Author: Jerome Gateau
Author: Bruno Bresson
Author: Marco Petrovich ORCID iD
Author: D. Vandembroucq
Author: Gilles Tessier

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