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Whispering-gallery-mode laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry
Umeå University, Faculty of Science and Technology, Department of Physics. Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China; Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China.ORCID iD: 0000-0002-3966-8943
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2017 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 42, no 16, p. 3109-3112Article in journal (Refereed) Published
Abstract [en]

The whispering-gallery-mode (WGM) laser is a type of laser that has an exceptionally narrow linewidth. Noise-immune cavity-enhanced optical heterodyne molecular spectrometry, which is a detection technique with extraordinary properties that benefit from narrow linewidth lasers, has been realized with a WGM laser. By locking to a cavity with a finesse of 55 000, acetylene and carbon dioxide could be simultaneously detected down to an unprecedented noise equivalent absorption per unit length of 6.6 x 10(-14) cm(-1) over 150 s, corresponding to 5 ppt of C2H2.

Place, publisher, year, edition, pages
OPTICAL SOC AMER , 2017. Vol. 42, no 16, p. 3109-3112
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-142879DOI: 10.1364/OL.42.003109ISI: 000407640000014PubMedID: 28809884OAI: oai:DiVA.org:umu-142879DiVA, id: diva2:1165540
Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2018-06-09Bibliographically approved

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Zhao, GangHausmaninger, ThomasAxner, Ove

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