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Transverse-mode coupling and diffraction loss in tunable Fabry-Pé rot microcavities

Benedikter, J.; Hümmer, T.; Mader, M.; Schlederer, B.; Reichel, J.; Hänsch, T. W.; Hunger, D. ORCID iD icon


Wereport on measurements and modeling of the mode structure of tunable Fabry–Pérot optical microcavities with imperfect mirrors.Wefind that non-spherical mirror shape and finite mirror size leave the fundamental mode mostly unaffected, but lead to loss, mode deformation, and shifted resonance frequencies at particular mirror separations. For small mirror diameters, the useful cavity length is limited to values significantly below the expected stability range.Weexplain the observations by resonant coupling between different transverse modes of the cavity and mode-dependent diffraction loss. A model based on resonant state expansion that takes into account the measured mirror profile can reproduce the measurements and identify the parameter regime where detrimental effects of mode mixing are avoided.

Verlagsausgabe §
DOI: 10.5445/IR/1000064864
Veröffentlicht am 06.04.2018
DOI: 10.1088/1367-2630/17/5/053051
Zitationen: 57
Zitationen: 62
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen-ID: 1000064864
Erschienen in New journal of physics
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 17
Seiten Art. Nr.: 053051
Schlagwörter Fabry–Perot resonators, fiber cavities, diffraction, mode coupling
Nachgewiesen in Dimensions
Web of Science
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