Centro Studi e Ricerche E. Fermi, Rome, Italy.
Opt Lett. 2011 Sep 1;36(17):3521-3. doi: 10.1364/OL.36.003521.
Microbubble resonators combine the unique properties of whispering gallery mode resonators with the intrinsic capability of integrated microfluidics. Here an improved fabrication method of microbubble resonators is presented, based on the heating of a slightly pressurized capillary by a rotating arc discharge. Rotation of the electrodes, moved out of a fiber splicer, ensures a homogeneous distribution of the heat all over the capillary surface. The demonstrated microbubble resonators have Q factors up to 6×10(7) at 1550 nm. Microbubbles were filled with water and aqueous solutions of ethanol in order to test the refractive index sensing capabilities of such resonators, which also show a good temporal stability. The limit of detection of our microbubble resonator sensor is 10(-6) RIU.
微泡谐振器将声回廊模式谐振器的独特性能与集成微流控的固有能力相结合。在这里，提出了一种改进的微泡谐振器制造方法，该方法基于通过旋转电弧放电对微压毛细管进行加热。旋转电极，从光纤熔接机中移出，可确保毛细管表面的热量均匀分布。所展示的微泡谐振器在 1550nm 处的 Q 因子高达 6×10(7)。微泡中充满了水和乙醇水溶液，以测试此类谐振器的折射率传感性能，它们也表现出良好的时间稳定性。我们的微泡谐振器传感器的检测限为 10(-6) RIU。
