Single-input spherical microbubble resonator
2011; Optica Publishing Group; Volume: 36; Issue: 11 Linguagem: Inglês
10.1364/ol.36.002113
ISSN1539-4794
AutoresAmy Watkins, Jonathan M. Ward, Yuqiang Wu, Síle Nic Chormaic,
Tópico(s)Advanced Fiber Laser Technologies
ResumoA single-input whispering gallery optical microbubble resonator is presented. Spherical microbubbles with diameters less than 100 μm, micrometer-sized wall thicknesses, and a single opening or input were fabricated by heating the tapered tip of a pressurized glass capillary using a CO(2) laser. Optical whispering gallery modes with Q factors of ∼10(5) were obtained. The bubbles were filled with water and mode shifts of ∼20 GHz were observed. Fano-type resonances were detected when the coupling optical fiber diameter was less than 1 μm, causing the microresonator to switch from being a band-stop filter to a bandpass filter. Larger bubbles with submicrometer wall thickness were also fabricated.
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