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Sensitive and broadband measurement of dispersion in a cavity using a Fourier transform spectrometer with kHz resolution
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics. State Key Laboratory of Quantum Optics and Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China.
Umeå University, Faculty of Science and Technology, Department of Physics.
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2017 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 18, p. 21711-21718Article in journal (Refereed) Published
Abstract [en]

Optical cavities provide high sensitivity to dispersion since their resonance frequencies depend on the index of refraction. We present a direct, broadband, and accurate measurement of the modes of a high finesse cavity using an optical frequency comb and a mechanical Fourier transform spectrometer with a kHz-level resolution. We characterize 16000 longitudinal cavity modes spanning 16 THz of bandwidth in terms of center frequency, linewidth, and amplitude. Using the center frequencies we retrieve the group delay dispersion of the cavity mirror coatings and pure N2 with 0.1 fs2 precision and 1 fs2 accuracy, as well as the refractivity of the 3ν13 absorption band of CO2 with 5 × 10‒12 precision. This opens up for broadband refractive index metrology and calibration-free spectroscopy of entire molecular bands.

Place, publisher, year, edition, pages
Optical Society of America, 2017. Vol. 25, no 18, p. 21711-21718
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-140651DOI: 10.1364/OE.25.021711ISI: 000411529000067OAI: oai:DiVA.org:umu-140651DiVA, id: diva2:1149963
Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2018-06-09Bibliographically approved

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Rutkowski, LucileJohansson, Alexandra C.Zhao, GangHausmaninger, ThomasKhodabakhsh, AmirAxner, OveFoltynowicz, Aleksandra

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Rutkowski, LucileJohansson, Alexandra C.Zhao, GangHausmaninger, ThomasKhodabakhsh, AmirAxner, OveFoltynowicz, Aleksandra
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