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Title: Third order nonlinear optical properties of bismuth zinc borate glasses

Abstract

Third order nonlinear optical characterization of bismuth zinc borate glasses are reported here using different laser pulse durations. Bismuth zinc borate glasses with compositions xBi{sub 2}O{sub 3}-30ZnO-(70-x) B{sub 2}O{sub 3} (where x = 30, 35, 40, and 45 mol. %) have been prepared by melt quenching method. These glasses were characterized by Raman, UV-Vis absorption, and Z scan measurements. Raman and UV-Vis spectroscopic results indicate that non-bridging oxygens increase with increase of bismuth content in the glass. Nonlinear absorption and refraction behavior in the nanosecond (ns), picosecond (ps), and femtosecond (fs) time domains were studied in detail. Strong reverse saturable absorption due to dominant two-photon absorption (TPA) was observed with both ps and fs excitations. In the case of ns pulse excitations, TPA and free-carrier absorption processes contribute for the nonlinear absorption. Two-photon absorption coefficient (β) and the absorption cross section due to free carriers (σ{sub e}) are estimated by theoretical fit of the open aperture Z-scan measurements and found to be dependent on the amount of bismuth oxide in the glass composition. In both ns and fs regimes the sign and magnitude of the third order nonlinearity are evaluated, and the optical limiting characteristics are also reported.

Authors:
;  [1]; ;  [2]
  1. Department of Physics, Pondicherry University, Puducherry 605 014 (India)
  2. School of Physics, University of Hyderabad, Hyderabad 500046, Andhra Pradesh (India)
Publication Date:
OSTI Identifier:
22267757
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; APERTURES; BISMUTH; BISMUTH OXIDES; BORATES; BORON OXIDES; CROSS SECTIONS; EXCITATION; GLASS; LASERS; OPTICAL PROPERTIES; OXYGEN; PHOTONS; QUENCHING; ZINC

Citation Formats

Shanmugavelu, B., Ravi Kanth Kumar, V. V., E-mail: ravi.phy@pondiuni.edu.in, Kuladeep, R., and Narayana Rao, D. Third order nonlinear optical properties of bismuth zinc borate glasses. United States: N. p., 2013. Web. doi:10.1063/1.4858422.
Shanmugavelu, B., Ravi Kanth Kumar, V. V., E-mail: ravi.phy@pondiuni.edu.in, Kuladeep, R., & Narayana Rao, D. Third order nonlinear optical properties of bismuth zinc borate glasses. United States. doi:10.1063/1.4858422.
Shanmugavelu, B., Ravi Kanth Kumar, V. V., E-mail: ravi.phy@pondiuni.edu.in, Kuladeep, R., and Narayana Rao, D. Sat . "Third order nonlinear optical properties of bismuth zinc borate glasses". United States. doi:10.1063/1.4858422.
@article{osti_22267757,
title = {Third order nonlinear optical properties of bismuth zinc borate glasses},
author = {Shanmugavelu, B. and Ravi Kanth Kumar, V. V., E-mail: ravi.phy@pondiuni.edu.in and Kuladeep, R. and Narayana Rao, D.},
abstractNote = {Third order nonlinear optical characterization of bismuth zinc borate glasses are reported here using different laser pulse durations. Bismuth zinc borate glasses with compositions xBi{sub 2}O{sub 3}-30ZnO-(70-x) B{sub 2}O{sub 3} (where x = 30, 35, 40, and 45 mol. %) have been prepared by melt quenching method. These glasses were characterized by Raman, UV-Vis absorption, and Z scan measurements. Raman and UV-Vis spectroscopic results indicate that non-bridging oxygens increase with increase of bismuth content in the glass. Nonlinear absorption and refraction behavior in the nanosecond (ns), picosecond (ps), and femtosecond (fs) time domains were studied in detail. Strong reverse saturable absorption due to dominant two-photon absorption (TPA) was observed with both ps and fs excitations. In the case of ns pulse excitations, TPA and free-carrier absorption processes contribute for the nonlinear absorption. Two-photon absorption coefficient (β) and the absorption cross section due to free carriers (σ{sub e}) are estimated by theoretical fit of the open aperture Z-scan measurements and found to be dependent on the amount of bismuth oxide in the glass composition. In both ns and fs regimes the sign and magnitude of the third order nonlinearity are evaluated, and the optical limiting characteristics are also reported.},
doi = {10.1063/1.4858422},
journal = {Journal of Applied Physics},
number = 24,
volume = 114,
place = {United States},
year = {Sat Dec 28 00:00:00 EST 2013},
month = {Sat Dec 28 00:00:00 EST 2013}
}
  • The glasses of composition xLi{sub 2}O-15ZnO- 20Bi{sub 2}O{sub 3}- (64 - x) B{sub 2}O{sub 3}- 1EuO (ZLB) (where x=0, 5, 10, 15, 20 mole %) prepared by melt-quenching technique. The amorphous nature of the prepared glasses was confirmed by XRD spectra. The UV-Vis optical absorption spectrum was recorded in the wave length range of 200-1000 nm. It is observed that the optical band gap is inversely changing with Urbach energy. The optical constants such as G (a constant proportional to the second-order deformation potential) and E{sub f} (a constant that depends on local coordination and is called as free energy ofmore » the glass system). The most significant result of the present work is the refractive index dispersion curves of the ZLB glasses obey the single-oscillator model and oscillator parameters (E{sub o}, E{sub d}) changed with the Li{sub 2}O content. the absorption edge, band gap and Urbach energy is changing nonlinearly with increasing content of Li{sub 2}O, which can be used to calculate the optical, physical, and other constants.« less
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