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 - 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: [email protected]).
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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U2 - 10.1109/JPHOT.2019.2941487
DO - 10.1109/JPHOT.2019.2941487
M3 - Article
AN - SCOPUS:85077736948
SN - 1943-0655
VL - 11
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 5
M1 - 8839058
ER -