Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser

Sunil Susmithan; Chunnong Zhao; Qi Fang; Li Ju; David Blair

doi:10.1088/1742-6596/363/1/012018

Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser

Sunil Susmithan, Chunnong Zhao, Qi Fang, Li Ju, David Blair

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

5 Citations (Scopus)

Abstract

Three mode interactions could induce parametric instability in advanced gravitational wave detectors with high optical power circulating in the cavities. One of the conditions for parametric instability to occur is when the cavity frequency difference between fundamental mode and the high order mode matches the test mass acoustic mode frequency. The optical mode spacing is a function of cavity g-factor (radius of curvature). At the Gingin High Optical Power Facility, we have an 80 meter optical cavity particularly designed for studying high optical power effects in advanced gravitational wave detectors such as parametric instabilities. Here we present the recent results of thermal tuning the cavity g-factor by heating the test mass surface with a CO ₂ laser to investigate the 3-mode interactions. Observation of test mass thermal noise peaks above 160 kHz enhanced by 3 mode interaction is presented.

Original language	English
Title of host publication	Journal of Physics
Subtitle of host publication	Conference Series
Editors	Mark Hannam, Patrick Sutton, Stefan Hild, Chris Van Den Broeck
Place of Publication	Bristol, UK
Publisher	IOP Publishing
Number of pages	6
Volume	363
ISBN (Print)	1742-6588
DOIs	https://doi.org/10.1088/1742-6596/363/1/012018
Publication status	Published - 2012
Event	9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting - Cardiff, United Kingdom Duration: 10 Jul 2011 → 15 Jul 2011 Conference number: NRDA2011

Conference

Conference	9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting
Country/Territory	United Kingdom
City	Cardiff
Period	10/07/11 → 15/07/11

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10.1088/1742-6596/363/1/012018

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title = "Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser",

abstract = "Three mode interactions could induce parametric instability in advanced gravitational wave detectors with high optical power circulating in the cavities. One of the conditions for parametric instability to occur is when the cavity frequency difference between fundamental mode and the high order mode matches the test mass acoustic mode frequency. The optical mode spacing is a function of cavity g-factor (radius of curvature). At the Gingin High Optical Power Facility, we have an 80 meter optical cavity particularly designed for studying high optical power effects in advanced gravitational wave detectors such as parametric instabilities. Here we present the recent results of thermal tuning the cavity g-factor by heating the test mass surface with a CO 2 laser to investigate the 3-mode interactions. Observation of test mass thermal noise peaks above 160 kHz enhanced by 3 mode interaction is presented.",

author = "Sunil Susmithan and Chunnong Zhao and Qi Fang and Li Ju and David Blair",

year = "2012",

doi = "10.1088/1742-6596/363/1/012018",

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booktitle = "Journal of Physics",

publisher = "IOP Publishing",

address = "United Kingdom",

note = "9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting ; Conference date: 10-07-2011 Through 15-07-2011",

}

Susmithan, S, Zhao, C , Fang, Q , Ju, L & Blair, D 2012, Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser. in M Hannam, P Sutton, S Hild & C Van Den Broeck (eds), Journal of Physics: Conference Series. vol. 363, 012018, IOP Publishing, Bristol, UK, 9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting , Cardiff, United Kingdom, 10/07/11. https://doi.org/10.1088/1742-6596/363/1/012018

Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser. / Susmithan, Sunil; Zhao, Chunnong ; Fang, Qi et al.
Journal of Physics: Conference Series. ed. / Mark Hannam; Patrick Sutton; Stefan Hild; Chris Van Den Broeck. Vol. 363 Bristol, UK: IOP Publishing, 2012. 012018.

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

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AB - Three mode interactions could induce parametric instability in advanced gravitational wave detectors with high optical power circulating in the cavities. One of the conditions for parametric instability to occur is when the cavity frequency difference between fundamental mode and the high order mode matches the test mass acoustic mode frequency. The optical mode spacing is a function of cavity g-factor (radius of curvature). At the Gingin High Optical Power Facility, we have an 80 meter optical cavity particularly designed for studying high optical power effects in advanced gravitational wave detectors such as parametric instabilities. Here we present the recent results of thermal tuning the cavity g-factor by heating the test mass surface with a CO 2 laser to investigate the 3-mode interactions. Observation of test mass thermal noise peaks above 160 kHz enhanced by 3 mode interaction is presented.

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A2 - Van Den Broeck, Chris

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ER -

Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser

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