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  Cancellation of lateral displacement noise of 3-port gratings for coupling light to cavities

Meinders, M., Kroker, S., Singh, A. P., Kley, E.-B., Tünnermann, A., Danzmann, K., et al. (2015). Cancellation of lateral displacement noise of 3-port gratings for coupling light to cavities. Optics Letters, 40, 2053-2055. doi:10.1364/OL.40.002053.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-12CB-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-12CC-F
Genre: Journal Article

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 Creators:
Meinders, Melanie1, Author
Kroker, Stefanie, Author
Singh, Amrit Pal1, Author
Kley, Ernst-Bernhard, Author
Tünnermann, Andreas, Author
Danzmann, Karsten1, 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: Reflection gratings enable light coupling to optical cavities without transmission through substrates. Gratings that have three ports and are mounted in second-order Littrow configuration even allow the coupling to high-finesse cavities using low diffraction efficiencies. In contrast to conventional transmissive cavity couplers, however, the phase of the diffracted light depends on the lateral position of the grating, which introduces an additional noise coupling. Here we experimentally demonstrate that this kind of noise cancels out once both diffracted output ports of the grating are combined. We achieve the same signal-to-shot-noise ratio as for a conventional coupler. From this perspective, 3-port grating couplers in second-order Littrow configuration remain a valuable approach to reducing optical absorption of cavity coupler substrates in future gravitational wave detectors.

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 Dates: 2015-03-042015-04-292015
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: arXiv: 1503.01381
DOI: 10.1364/OL.40.002053
URI: http://arxiv.org/abs/1503.01381
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Title: Optics Letters
Source Genre: Journal
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Publ. Info: Washington : Optical Society of America
Pages: - Volume / Issue: 40 Sequence Number: - Start / End Page: 2053 - 2055 Identifier: ISSN: 0146-9592
CoNE: /journals/resource/954925474435