AlPO4 in Silica Glass Optical Fibers: Deduction of Additional Material Properties

Nanjie Yu; Thomas W. Hawkins; Thao Vien Bui; Maxime Cavillon; John Ballato; Peter D. Dragic

doi:10.1109/JPHOT.2019.2941487

AlPO₄ in Silica Glass Optical Fibers: Deduction of Additional Material Properties

Nanjie Yu, Thomas W. Hawkins, Thao Vien Bui, Maxime Cavillon, John Ballato, Peter D. Dragic

Research output: Contribution to journal › Article › peer-review

Abstract

A silica clad optical fiber with a core comprised of SiO₂, P₂O₅, Al₂O₃, and AlPO₄ is analyzed in order to determine the impact of AlPO₄ when added to silica. A chromatic dispersion curve is presented, from which the nonlinear refractive index is estimated to be similar to that of silica. When doped into SiO₂, AlPO₄ decreases the thermo-optic coefficient (slightly), decreases the acoustic velocity, broadens the Brillouin spectral width through increased viscoelastic damping, and reduces the strength of the dependence of Brillouin frequency on temperature. Findings herein indicate that AlPO₄ has a near-zero value of p₁₂. It also is found that the fiber does not have complete AlPO₄ formation, with some P₂O₅ formation in Al₂O₃-rich regions of the fiber. Given the relevance of AlPO₄ to high power active fiber technology, the presented data can be used for designing fibers with enhanced performance characteristics, such as those with elevated threshold for the onset of stimulated Brillouin scattering.

Original language	English (US)
Article number	8839058
Journal	IEEE Photonics Journal
Volume	11
Issue number	5
DOIs	https://doi.org/10.1109/JPHOT.2019.2941487
State	Published - Oct 2019

Keywords

Fiber optics
aluminum
fiber lasers
fiber nonlinear optics
glass
optical fiber testing
optical materials
phosphorus

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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@article{bab74dc6bfdf43d4b0fe266bedfa3737,

title = "AlPO4 in Silica Glass Optical Fibers: Deduction of Additional Material Properties",

abstract = "A silica clad optical fiber with a core comprised of SiO2, P2O5, Al2O3, and AlPO4 is analyzed in order to determine the impact of AlPO4 when added to silica. A chromatic dispersion curve is presented, from which the nonlinear refractive index is estimated to be similar to that of silica. When doped into SiO2, AlPO4 decreases the thermo-optic coefficient (slightly), decreases the acoustic velocity, broadens the Brillouin spectral width through increased viscoelastic damping, and reduces the strength of the dependence of Brillouin frequency on temperature. Findings herein indicate that AlPO4 has a near-zero value of p12. It also is found that the fiber does not have complete AlPO4 formation, with some P2O5 formation in Al2O3-rich regions of the fiber. Given the relevance of AlPO4 to high power active fiber technology, the presented data can be used for designing fibers with enhanced performance characteristics, such as those with elevated threshold for the onset of stimulated Brillouin scattering.",

keywords = "Fiber optics, aluminum, fiber lasers, fiber nonlinear optics, glass, optical fiber testing, optical materials, phosphorus",

author = "Nanjie Yu and Hawkins, {Thomas W.} and Bui, {Thao Vien} and Maxime Cavillon and John Ballato and Dragic, {Peter D.}",

note = "Funding Information: Manuscript received August 5, 2019; revised September 6, 2019; accepted September 11, 2019. Date of publication September 16, 2019; date of current version October 4, 2019. This work was supported by the US Department of Defense Joint Directed Energy Transition Office (DE-JTO) under Contracts W911NF-05-1-0517, FA9550-07-1-0566, W911NF-12-1-0602, FA9451-15-D-0009/0001 and 0002, and N00014-17-1-2546. The work of J. Ballato, T. W. Hawkins, and M. Cavillon was supported by the J. E. Sirrine Foundation. Corresponding author: Nanjie Yu (e-mail: nanjiey2@illinois.edu). Funding Information: This work was supported by the US Department of Defense Joint Directed Energy Transition Office (DEJTO) under Contracts W911NF-05-1-0517, FA9550-07-1-0566, W911NF-12-1-0602, FA9451-15- D-0009/0001 and 0002, and N00014-17-1-2546. The work of J. Ballato, T. W. Hawkins, and M. Cavillon was supported by the J. E. Sirrine Foundation.",

year = "2019",

month = oct,

doi = "10.1109/JPHOT.2019.2941487",

language = "English (US)",

volume = "11",

journal = "IEEE Photonics Journal",

issn = "1943-0655",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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TY - JOUR

T1 - AlPO4 in Silica Glass Optical Fibers

T2 - Deduction of Additional Material Properties

AU - Yu, Nanjie

AU - Hawkins, Thomas W.

AU - Bui, Thao Vien

AU - Cavillon, Maxime

AU - Ballato, John

AU - Dragic, Peter D.

N1 - Funding Information: Manuscript received August 5, 2019; revised September 6, 2019; accepted September 11, 2019. Date of publication September 16, 2019; date of current version October 4, 2019. This work was supported by the US Department of Defense Joint Directed Energy Transition Office (DE-JTO) under Contracts W911NF-05-1-0517, FA9550-07-1-0566, W911NF-12-1-0602, FA9451-15-D-0009/0001 and 0002, and N00014-17-1-2546. The work of J. Ballato, T. W. Hawkins, and M. Cavillon was supported by the J. E. Sirrine Foundation. Corresponding author: Nanjie Yu (e-mail: nanjiey2@illinois.edu). Funding Information: This work was supported by the US Department of Defense Joint Directed Energy Transition Office (DEJTO) under Contracts W911NF-05-1-0517, FA9550-07-1-0566, W911NF-12-1-0602, FA9451-15- D-0009/0001 and 0002, and N00014-17-1-2546. The work of J. Ballato, T. W. Hawkins, and M. Cavillon was supported by the J. E. Sirrine Foundation.

PY - 2019/10

Y1 - 2019/10

N2 - A silica clad optical fiber with a core comprised of SiO2, P2O5, Al2O3, and AlPO4 is analyzed in order to determine the impact of AlPO4 when added to silica. A chromatic dispersion curve is presented, from which the nonlinear refractive index is estimated to be similar to that of silica. When doped into SiO2, AlPO4 decreases the thermo-optic coefficient (slightly), decreases the acoustic velocity, broadens the Brillouin spectral width through increased viscoelastic damping, and reduces the strength of the dependence of Brillouin frequency on temperature. Findings herein indicate that AlPO4 has a near-zero value of p12. It also is found that the fiber does not have complete AlPO4 formation, with some P2O5 formation in Al2O3-rich regions of the fiber. Given the relevance of AlPO4 to high power active fiber technology, the presented data can be used for designing fibers with enhanced performance characteristics, such as those with elevated threshold for the onset of stimulated Brillouin scattering.

AB - A silica clad optical fiber with a core comprised of SiO2, P2O5, Al2O3, and AlPO4 is analyzed in order to determine the impact of AlPO4 when added to silica. A chromatic dispersion curve is presented, from which the nonlinear refractive index is estimated to be similar to that of silica. When doped into SiO2, AlPO4 decreases the thermo-optic coefficient (slightly), decreases the acoustic velocity, broadens the Brillouin spectral width through increased viscoelastic damping, and reduces the strength of the dependence of Brillouin frequency on temperature. Findings herein indicate that AlPO4 has a near-zero value of p12. It also is found that the fiber does not have complete AlPO4 formation, with some P2O5 formation in Al2O3-rich regions of the fiber. Given the relevance of AlPO4 to high power active fiber technology, the presented data can be used for designing fibers with enhanced performance characteristics, such as those with elevated threshold for the onset of stimulated Brillouin scattering.

KW - Fiber optics

KW - aluminum

KW - fiber lasers

KW - fiber nonlinear optics

KW - glass

KW - optical fiber testing

KW - optical materials

KW - phosphorus

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