Induced defects and increase of second-order nonlinearity in ultraviolet-poled GeO2-SiO2 glass

Motoshi Ohama; Takumi Fujiwara; Akira J. Ikushima

doi:10.1143/jjap.38.6359

Induced defects and increase of second-order nonlinearity in ultraviolet-poled GeO₂-SiO₂ glass

Motoshi Ohama, Takumi Fujiwara, Akira J. Ikushima

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

5 Citations (Scopus)

Abstract

We report on enhancement by thermal defects control of the second-order optical nonlinearity in GeO₂-SiO₂ glass induced by ultraviolet (UV) poling. The present work is based on the previous results which suggest GeE' centers as the most relevant ingredient to produce the induced nonlinearity, and heat treatment in a vacuum before UV poling has been found to increase the induced second-harmonic generation (SHG). The result is thought to be related to an increase of oxygen deficient defects, which function as precursors of the photoinduced GeE' centers. To obtain larger d coefficient, optimization of pre-heat treatment conditions, temperature and time duration, have been investigated. The largest value of d₃₃ coefficient thus far obtained is 5.1±0.2 pm/V in UV-poled GeO₂-SiO₂ glass of 15 mole% GeO₂ content with the pre-heat treatment at 1200 °C for 5 h, which exceeds d₁₃, the second largest coefficient of LiNbO₃.

Original language	English
Pages (from-to)	6359-6361
Number of pages	3
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	38
Issue number	11
DOIs	https://doi.org/10.1143/jjap.38.6359
Publication status	Published - 1999 Nov
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Induced defects and increase of second-order nonlinearity in ultraviolet-poled GeO2-SiO2 glass",

abstract = "We report on enhancement by thermal defects control of the second-order optical nonlinearity in GeO2-SiO2 glass induced by ultraviolet (UV) poling. The present work is based on the previous results which suggest GeE' centers as the most relevant ingredient to produce the induced nonlinearity, and heat treatment in a vacuum before UV poling has been found to increase the induced second-harmonic generation (SHG). The result is thought to be related to an increase of oxygen deficient defects, which function as precursors of the photoinduced GeE' centers. To obtain larger d coefficient, optimization of pre-heat treatment conditions, temperature and time duration, have been investigated. The largest value of d33 coefficient thus far obtained is 5.1±0.2 pm/V in UV-poled GeO2-SiO2 glass of 15 mole% GeO2 content with the pre-heat treatment at 1200 °C for 5 h, which exceeds d13, the second largest coefficient of LiNbO3.",

author = "Motoshi Ohama and Takumi Fujiwara and Ikushima, {Akira J.}",

year = "1999",

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T1 - Induced defects and increase of second-order nonlinearity in ultraviolet-poled GeO2-SiO2 glass

AU - Ohama, Motoshi

AU - Fujiwara, Takumi

AU - Ikushima, Akira J.

PY - 1999/11

Y1 - 1999/11

N2 - We report on enhancement by thermal defects control of the second-order optical nonlinearity in GeO2-SiO2 glass induced by ultraviolet (UV) poling. The present work is based on the previous results which suggest GeE' centers as the most relevant ingredient to produce the induced nonlinearity, and heat treatment in a vacuum before UV poling has been found to increase the induced second-harmonic generation (SHG). The result is thought to be related to an increase of oxygen deficient defects, which function as precursors of the photoinduced GeE' centers. To obtain larger d coefficient, optimization of pre-heat treatment conditions, temperature and time duration, have been investigated. The largest value of d33 coefficient thus far obtained is 5.1±0.2 pm/V in UV-poled GeO2-SiO2 glass of 15 mole% GeO2 content with the pre-heat treatment at 1200 °C for 5 h, which exceeds d13, the second largest coefficient of LiNbO3.

AB - We report on enhancement by thermal defects control of the second-order optical nonlinearity in GeO2-SiO2 glass induced by ultraviolet (UV) poling. The present work is based on the previous results which suggest GeE' centers as the most relevant ingredient to produce the induced nonlinearity, and heat treatment in a vacuum before UV poling has been found to increase the induced second-harmonic generation (SHG). The result is thought to be related to an increase of oxygen deficient defects, which function as precursors of the photoinduced GeE' centers. To obtain larger d coefficient, optimization of pre-heat treatment conditions, temperature and time duration, have been investigated. The largest value of d33 coefficient thus far obtained is 5.1±0.2 pm/V in UV-poled GeO2-SiO2 glass of 15 mole% GeO2 content with the pre-heat treatment at 1200 °C for 5 h, which exceeds d13, the second largest coefficient of LiNbO3.

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Induced defects and increase of second-order nonlinearity in ultraviolet-poled GeO₂-SiO₂ glass

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