TY  - JOUR
AU  - Allsop, Thomas P.
AU  - Kalli, Kyriacos
AU  - Zhou, Kaiming
AU  - Smith, Graham N.
AU  - Komodromos, Michael
AU  - Petrović, Jovana S.
AU  - Webb, David J.
AU  - Bennion, Ian
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4469
AB  - The spectral properties of long-period gratings (LPGs) fabricated in photonic crystal fibers using femtosecond laser pulses by the point-by-point technique, without oil-immersion of the fiber, are investigated in detail. Postfabrication spectral monitoring at room temperature showed significant long-term instability of the gratings and stable spectra only after 600 h. The stabilized spectral properties of the gratings improved with increasing annealing temperature. The observed changes in resonant wavelength, optical strength, and grating birefringence were correlated to the laser inscription energy and were further used to study the mechanism of femtosecond inscription. Furthermore, the femtosecond-laser inscribed LPGs were compared to electric-arc fabricated LPGs. Comparison of experimental results with theoretical models of LPGs and laser propagation during inscription indicate that the major processes responsible for the index change are permanent compaction and thermally induced strain, the latter can be significantly changed through annealing. (C) 2011 Optical Society of America
T2  - Journal of the Optical Society of America. B: Optical Physics
T1  - Spectral characteristics and thermal evolution of long-period gratings in photonic crystal fibers fabricated with a near-IR radiation femtosecond laser using point-by-point inscription
VL  - 28
IS  - 9
SP  - 2105
EP  - 2114
DO  - 10.1364/JOSAB.28.002105
ER  - 

@article{
author = "Allsop, Thomas P. and Kalli, Kyriacos and Zhou, Kaiming and Smith, Graham N. and Komodromos, Michael and Petrović, Jovana S. and Webb, David J. and Bennion, Ian",
year = "2011",
abstract = "The spectral properties of long-period gratings (LPGs) fabricated in photonic crystal fibers using femtosecond laser pulses by the point-by-point technique, without oil-immersion of the fiber, are investigated in detail. Postfabrication spectral monitoring at room temperature showed significant long-term instability of the gratings and stable spectra only after 600 h. The stabilized spectral properties of the gratings improved with increasing annealing temperature. The observed changes in resonant wavelength, optical strength, and grating birefringence were correlated to the laser inscription energy and were further used to study the mechanism of femtosecond inscription. Furthermore, the femtosecond-laser inscribed LPGs were compared to electric-arc fabricated LPGs. Comparison of experimental results with theoretical models of LPGs and laser propagation during inscription indicate that the major processes responsible for the index change are permanent compaction and thermally induced strain, the latter can be significantly changed through annealing. (C) 2011 Optical Society of America",
journal = "Journal of the Optical Society of America. B: Optical Physics",
title = "Spectral characteristics and thermal evolution of long-period gratings in photonic crystal fibers fabricated with a near-IR radiation femtosecond laser using point-by-point inscription",
volume = "28",
number = "9",
pages = "2105-2114",
doi = "10.1364/JOSAB.28.002105"
}

Allsop, T. P., Kalli, K., Zhou, K., Smith, G. N., Komodromos, M., Petrović, J. S., Webb, D. J.,& Bennion, I.. (2011). Spectral characteristics and thermal evolution of long-period gratings in photonic crystal fibers fabricated with a near-IR radiation femtosecond laser using point-by-point inscription. in Journal of the Optical Society of America. B: Optical Physics, 28(9), 2105-2114.
https://doi.org/10.1364/JOSAB.28.002105

Allsop TP, Kalli K, Zhou K, Smith GN, Komodromos M, Petrović JS, Webb DJ, Bennion I. Spectral characteristics and thermal evolution of long-period gratings in photonic crystal fibers fabricated with a near-IR radiation femtosecond laser using point-by-point inscription. in Journal of the Optical Society of America. B: Optical Physics. 2011;28(9):2105-2114.
doi:10.1364/JOSAB.28.002105 .

Allsop, Thomas P., Kalli, Kyriacos, Zhou, Kaiming, Smith, Graham N., Komodromos, Michael, Petrović, Jovana S., Webb, David J., Bennion, Ian, "Spectral characteristics and thermal evolution of long-period gratings in photonic crystal fibers fabricated with a near-IR radiation femtosecond laser using point-by-point inscription" in Journal of the Optical Society of America. B: Optical Physics, 28, no. 9 (2011):2105-2114,
https://doi.org/10.1364/JOSAB.28.002105 . .