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Nonlinearity in poled tin-doped silica samples fabricated by sol-gel technique

Nonlinearity in poled tin-doped silica samples fabricated by sol-gel technique
Nonlinearity in poled tin-doped silica samples fabricated by sol-gel technique
Since its first proposal quasi-phase-matching (QPM) has been implemented in many materials to achieve efficient second-order nonlinear optical interactions. QPM provides flexibility and new possibilities for phase-matching, especially in materials where the birefringence is not high enough to compensate for the dispersion. Periodic poling of silica fibres exploits the potential of the QPM technology to extend the possibility of efficient frequency conversion to materials which have a widespread use in optical applications and offers several advantages. Thermal poling is the most reliable technique in terms of reproducibility and long-term stability of the induced nonlinearity. In this paper we present the results on induced nonlinearity we have achieved with thermal poling in two tin-doped silica samples fabricated by sol-gel technique [1]. The tin-content was estimated to be ~1.2 and 6%w/w. While the sample with lower Sn concentration appeared to be a glass, in the sample at high concentration, SnO2 segregated to give a glass ceramic. The second-order optical nonlinearity induced in glass by poling has been evaluated through a Maker fringe technique [2]. The second harmonic signal recorded for the poled samples is shown in figure 1. Data were fitted with d33 as free parameter. Assuming a nonlinear thickness of 5µm in the tin-doped samples, d33 is found to be ~0.20pm/V. The results confirm the good non-linearity of silica-based poled material prepared by sol-gel, whereas no relevant effects can be ascribed to the different phases of the SnO2 dopant at the indicated poling conditions.

Figure 1: Second harmonic signal (I2omega) as a function of the incident angle theta, for the poled glass-ceramic sample ([SnO2]~6%). The line represents the best fit achieved with d33=0.2026 pm/V.
Corbari, C.
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Brambilla, G.
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Chiodini, N.
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Paleari, A.
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Kazansky, P.G.
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Deparis, O.
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Corbari, C.
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Brambilla, G.
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Chiodini, N.
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Paleari, A.
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Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Deparis, O.
6bb2a112-4df2-4902-9645-dd3af9a8cedd

Corbari, C., Brambilla, G., Chiodini, N., Paleari, A., Kazansky, P.G. and Deparis, O. (2002) Nonlinearity in poled tin-doped silica samples fabricated by sol-gel technique. Silica and Advanced Dielectrics 2002, Trento, Italy. 15 - 18 Sep 2002.

Record type: Conference or Workshop Item (Paper)

Abstract

Since its first proposal quasi-phase-matching (QPM) has been implemented in many materials to achieve efficient second-order nonlinear optical interactions. QPM provides flexibility and new possibilities for phase-matching, especially in materials where the birefringence is not high enough to compensate for the dispersion. Periodic poling of silica fibres exploits the potential of the QPM technology to extend the possibility of efficient frequency conversion to materials which have a widespread use in optical applications and offers several advantages. Thermal poling is the most reliable technique in terms of reproducibility and long-term stability of the induced nonlinearity. In this paper we present the results on induced nonlinearity we have achieved with thermal poling in two tin-doped silica samples fabricated by sol-gel technique [1]. The tin-content was estimated to be ~1.2 and 6%w/w. While the sample with lower Sn concentration appeared to be a glass, in the sample at high concentration, SnO2 segregated to give a glass ceramic. The second-order optical nonlinearity induced in glass by poling has been evaluated through a Maker fringe technique [2]. The second harmonic signal recorded for the poled samples is shown in figure 1. Data were fitted with d33 as free parameter. Assuming a nonlinear thickness of 5µm in the tin-doped samples, d33 is found to be ~0.20pm/V. The results confirm the good non-linearity of silica-based poled material prepared by sol-gel, whereas no relevant effects can be ascribed to the different phases of the SnO2 dopant at the indicated poling conditions.

Figure 1: Second harmonic signal (I2omega) as a function of the incident angle theta, for the poled glass-ceramic sample ([SnO2]~6%). The line represents the best fit achieved with d33=0.2026 pm/V.

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e-pub ahead of print date: 2002
Venue - Dates: Silica and Advanced Dielectrics 2002, Trento, Italy, 2002-09-15 - 2002-09-18

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Local EPrints ID: 17027
URI: http://eprints.soton.ac.uk/id/eprint/17027
PURE UUID: a2269d21-3473-4888-9d06-c68a27ad7457

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Date deposited: 12 Sep 2005
Last modified: 22 Jul 2020 16:33

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Contributors

Author: C. Corbari
Author: G. Brambilla
Author: N. Chiodini
Author: A. Paleari
Author: P.G. Kazansky
Author: O. Deparis

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