Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO2-SiO2 glass optical cavity

Mototaka Arakawa; Jun Ichi Kushibiki; Yuji Ohashi; Yuko Maruyama; Naofumi Yamada; Shigeo Nagano; Ying Li; Mizuhiko Hosokawa; Yuko Hanado; Masahiko Watanabe; Koji Watanabe; Kenji Abe; Kazuyuki Etoh; Kazuhiko Ito

doi:10.7567/JJAP.54.096702

Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO₂-SiO₂ glass optical cavity

Mototaka Arakawa, Jun Ichi Kushibiki, Yuji Ohashi, Yuko Maruyama, Naofumi Yamada, Shigeo Nagano, Ying Li, Mizuhiko Hosokawa, Yuko Hanado, Masahiko Watanabe, Koji Watanabe, Kenji Abe, Kazuyuki Etoh, Kazuhiko Ito

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Abstract

We developed a procedure for fabricating a Fabry-Perot optical cavity with less long-term length variation. We fabricated a homogenized TiO₂- SiO₂ ultralow-expansion (ULE) glass ingot from a commercial TiO₂-SiO₂ ULE glass ingot with striae. We also controlled the zero-crossing temperature of the coefficient of thermal expansion of the homogenized ingot to approximately 30 °C by heat treatment at 970 °C for 72 h to change the fictive temperature of the ingot. A 100-mm-long cavity spacer was carefully fabricated while reducing the mechanical residual stress introduced by machining. A cavity composed of the spacer and two mirrors of 39-layered Ta₂O₅/SiO₂ films exhibited a high finesse of 420,000 at 729nm and a high length stability of 13 fm/day after 500 days from the beginning of the measurement at a constant temperature of 29.78 °C.

Original language	English
Article number	096702
Journal	Japanese journal of applied physics
Volume	54
Issue number	9
DOIs	https://doi.org/10.7567/JJAP.54.096702
Publication status	Published - 2015 Sept 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Arakawa, M., Kushibiki, J. I., Ohashi, Y., Maruyama, Y., Yamada, N., Nagano, S., Li, Y., Hosokawa, M., Hanado, Y., Watanabe, M., Watanabe, K., Abe, K., Etoh, K., & Ito, K. (2015). Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO₂-SiO₂ glass optical cavity. Japanese journal of applied physics, 54(9), [096702]. https://doi.org/10.7567/JJAP.54.096702

Arakawa, M, Kushibiki, JI, Ohashi, Y, Maruyama, Y, Yamada, N, Nagano, S, Li, Y, Hosokawa, M, Hanado, Y, Watanabe, M, Watanabe, K, Abe, K, Etoh, K & Ito, K 2015, 'Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO₂-SiO₂ glass optical cavity', Japanese journal of applied physics, vol. 54, no. 9, 096702. https://doi.org/10.7567/JJAP.54.096702

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title = "Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO2-SiO2 glass optical cavity",

abstract = "We developed a procedure for fabricating a Fabry-Perot optical cavity with less long-term length variation. We fabricated a homogenized TiO2- SiO2 ultralow-expansion (ULE) glass ingot from a commercial TiO2-SiO2 ULE glass ingot with striae. We also controlled the zero-crossing temperature of the coefficient of thermal expansion of the homogenized ingot to approximately 30 °C by heat treatment at 970 °C for 72 h to change the fictive temperature of the ingot. A 100-mm-long cavity spacer was carefully fabricated while reducing the mechanical residual stress introduced by machining. A cavity composed of the spacer and two mirrors of 39-layered Ta2O5/SiO2 films exhibited a high finesse of 420,000 at 729nm and a high length stability of 13 fm/day after 500 days from the beginning of the measurement at a constant temperature of 29.78 °C.",

author = "Mototaka Arakawa and Kushibiki, {Jun Ichi} and Yuji Ohashi and Yuko Maruyama and Naofumi Yamada and Shigeo Nagano and Ying Li and Mizuhiko Hosokawa and Yuko Hanado and Masahiko Watanabe and Koji Watanabe and Kenji Abe and Kazuyuki Etoh and Kazuhiko Ito",

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AU - Arakawa, Mototaka

AU - Kushibiki, Jun Ichi

AU - Ohashi, Yuji

AU - Maruyama, Yuko

AU - Yamada, Naofumi

AU - Nagano, Shigeo

AU - Li, Ying

AU - Hosokawa, Mizuhiko

AU - Hanado, Yuko

AU - Watanabe, Masahiko

AU - Watanabe, Koji

AU - Abe, Kenji

AU - Etoh, Kazuyuki

AU - Ito, Kazuhiko

PY - 2015/9/1

Y1 - 2015/9/1

N2 - We developed a procedure for fabricating a Fabry-Perot optical cavity with less long-term length variation. We fabricated a homogenized TiO2- SiO2 ultralow-expansion (ULE) glass ingot from a commercial TiO2-SiO2 ULE glass ingot with striae. We also controlled the zero-crossing temperature of the coefficient of thermal expansion of the homogenized ingot to approximately 30 °C by heat treatment at 970 °C for 72 h to change the fictive temperature of the ingot. A 100-mm-long cavity spacer was carefully fabricated while reducing the mechanical residual stress introduced by machining. A cavity composed of the spacer and two mirrors of 39-layered Ta2O5/SiO2 films exhibited a high finesse of 420,000 at 729nm and a high length stability of 13 fm/day after 500 days from the beginning of the measurement at a constant temperature of 29.78 °C.

AB - We developed a procedure for fabricating a Fabry-Perot optical cavity with less long-term length variation. We fabricated a homogenized TiO2- SiO2 ultralow-expansion (ULE) glass ingot from a commercial TiO2-SiO2 ULE glass ingot with striae. We also controlled the zero-crossing temperature of the coefficient of thermal expansion of the homogenized ingot to approximately 30 °C by heat treatment at 970 °C for 72 h to change the fictive temperature of the ingot. A 100-mm-long cavity spacer was carefully fabricated while reducing the mechanical residual stress introduced by machining. A cavity composed of the spacer and two mirrors of 39-layered Ta2O5/SiO2 films exhibited a high finesse of 420,000 at 729nm and a high length stability of 13 fm/day after 500 days from the beginning of the measurement at a constant temperature of 29.78 °C.

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Control of zero-crossing temperature of coefficient of thermal expansion and reduction of mechanical residual stress for TiO₂-SiO₂ glass optical cavity

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