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Controling the coupling properties of active ultrahigh-Q WGM microcavities from undercoupling to selective amplification
- Source :
- Scientific Reports, Scientific Reports, Nature Publishing Group, 2015, 4 (1), pp.4023. ⟨10.1038/srep04023⟩, Scientific Reports, 2015, 4 (1), pp.4023. ⟨10.1038/srep04023⟩, Scientific Reports, Nature Publishing Group, 2014, 4, pp.4023. 〈10.1038/srep04023〉
- Publication Year :
- 2014
- Publisher :
- Nature Publishing Group, 2014.
-
Abstract
- International audience; Ultrahigh-quality (Q) factor microresonators have a lot of applications in the photonics domain ranging from low-threshold nonlinear optics to integrated optical sensors. Glass-based whispering gallery mode (WGM) microresonators are easy to produce by melting techniques, however they suffer from surface contamination which limits their long-term quality factor to a few 10^8 . Here we show that an optical gain provided by erbium ions can compensate for residual losses. Moreover it is possible to control the coupling regime of an ultrahigh Q-factor three port microresonator from undercoupling to spectral selective amplification by changing the pumping rate. The optical characterization method is based on frequency-swept cavity-ring-down- pectroscopy. This method allows the transmission and dispersive properties of perfectly transparent microresonators and intrinsic finesses up to 4.0x10^7 to be measured. Finally we characterize a critically coupled fluoride glass WGM microresonator with a diameter of 220 mm and a loaded Q-factor of 5.3x10^9 is demonstrated.
- Subjects :
- Coupling
[PHYS]Physics [physics]
Multidisciplinary
Materials science
[ PHYS ] Physics [physics]
SLOW LIGHT
business.industry
OPTOELECTRONIC DEVICES AND COMPONENTS
SOLID-STATE LASERS
Nonlinear optics
Port (circuit theory)
Slow light
[ CHIM ] Chemical Sciences
Article
Quality (physics)
Transmission (telecommunications)
MICRORESONATORS
Optoelectronics
[CHIM]Chemical Sciences
Photonics
Whispering-gallery wave
business
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....1554fb4b3ed374dc36d099c040c96f02