KIT | KIT-Bibliothek | Impressum | Datenschutz
Open Access Logo
§
Volltext
URN: urn:nbn:de:swb:90-459411
Originalveröffentlichung
DOI: 10.1364/OE.23.001025
Scopus
Zitationen: 11
Web of Science
Zitationen: 10

Efficient free-space read-out of WGM lasers using circular micromirrors

Wienhold, Tobias; Kraemmer, Sarah; Bacher, Andreas; Kalt, Heinz; Koos, Christian; Koeber, Sebastian; Mappes, Timo

Abstract:
Lasing from whispering-gallery mode (WGM) resonators occurs omnidirectional in azimuthal plane. Most applications of WGM resonators require spectral analysis with off-chip detectors, where in-plane emission and beam divergence hinder efficient detection. We demonstrate redirecting WGM laser emission from all azimuthal angles using a circular micromirror placed around the cavity. By collecting reflections off the micromirror via free-space optics, read-out intensity improved by one order of magnitude. Blocking vertically emitted spontaneous emission and recording reflections off the micromirror only, signal-to-noise ratio improved from 4.6 dB to 15 dB. Our read-out concept may be applied to arbitrary WGM cavity geometries without deteriorating the cavity`s quality factor.


Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Mikrostrukturtechnik (IMT)
Karlsruhe Nano Micro Facility (KNMF)
Institut für Photonik und Quantenelektronik (IPQ)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1094-4087

KITopen-ID: 1000045941
HGF-Programm 47.02.07 (POF III, LK 01)
Erschienen in Optics express
Band 23
Heft 2
Seiten 1025-1034
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte Dye lasers, Polymers, Microstructure fabrication, Microcavities
Nachgewiesen in Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page