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  Waveguide grating mirror in a fully suspended 10 meter Fabry-Perot cavity

Friedrich, D., Barr, B. W., Brückner, F., Hild, S., Nelson, J., Mcarthur, J., et al. (2011). Waveguide grating mirror in a fully suspended 10 meter Fabry-Perot cavity. Optics Express, 19(16), 14955-14963. doi:http://dx.doi.org/10.1364/OE.19.014955.

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 Creators:
Friedrich, Daniel1, Author           
Barr, Bryan W., Author
Brückner, Frank, Author
Hild, Stefan1, Author           
Nelson, John, Author
Mcarthur, John, Author
Plissi, Michael V., Author
Edgar, Matthew P., Author
Huttner, Sabina H., Author
Sorazu, Borja, Author
Kroker, Stefanie, Author
Britzger, Michael1, Author           
Kley, Ernst-Bernhard, Author
Danzmann, Karsten1, Author           
Tünnermann, Andreas, Author
Strain, Ken A.1, Author           
Schnabel, Roman1, Author           
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Physics, Optics, physics.optics
 Abstract: We report on the first demonstration of a fully suspended 10m Fabry-Perot cavity incorporating a waveguide grating as the coupling mirror. The cavity was kept on resonance by reading out the length fluctuations via the Pound-Drever-Hall method and employing feedback to the laser frequency. From the achieved finesse of 790 the grating reflectivity was determined to exceed 99.2% at the laser wavelength of 1064\,nm, which is in good agreement with rigorous simulations. Our waveguide grating design was based on tantala and fused silica and included a ~20nm thin etch stop layer made of Al2O3 that allowed us to define the grating depth accurately during the fabrication process. Demonstrating stable operation of a waveguide grating featuring high reflectivity in a suspended low-noise cavity, our work paves the way for the potential application of waveguide gratings as mirrors in high-precision interferometry, for instance in future gravitational wave observatories.

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 Dates: 2011-04-142011
 Publication Status: Issued
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Title: Optics Express
Source Genre: Journal
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Publ. Info: Washington, DC : Optical Society of America
Pages: - Volume / Issue: 19 (16) Sequence Number: - Start / End Page: 14955 - 14963 Identifier: ISSN: 1094-4087
CoNE: https://pure.mpg.de/cone/journals/resource/954925609918