TY  - CONF
  - J Ward, Y Yang and S Nic Chormaic
  - Photonics West: Laser Resonators, Microresonators, and Beam Control XVI
  - Liquid core microbubble resonators for highly sensitive temperature sensing
  - 2014
  - February
  - Published
  - 1
  - ()
  - microbubbles, optical resonators, optical sensing
  - Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke; Kunihiko Washio
  - 89601W
  - San Jose, USA
  - It is experimentally shown that a large thermal blue shift of up to 100 GHz/K (0.2 nm/K at a wavelength of 775 nm) can be achieved with higher order radial modes in an ethanol-filled microbubble whispering gallery mode resonator (WGR). Q-factors for the most thermally sensitive modes are typically 105, equivalent to a measurement resolution of 8.5 mK. The thermal shift rate is determined for different modes when the core of the microbubble is filled with air, water, and ethanol. The measured shifts are compared against Finite Element Model (FEM) simulations. It is also shown that, if the microbubble is in the quasi-droplet regime, the fundamental TE mode in a bubble with a 500 nm wall is estimated to experience a shift of 35 GHz/K, while the effective index is still high enough to allow efficient coupling to a tapered optical fiber. Nonetheless, at a wall thickness of 1 μm, the most sensitive modes (n = 2) observed were still strongly coupled.
  - http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1840896
DA  - 2014/02
ER  - 

@inproceedings{V268678660,
   = {J Ward, Y Yang and S Nic Chormaic},
   = {Photonics West: Laser Resonators, Microresonators, and Beam Control XVI},
   = {{Liquid core microbubble resonators for highly sensitive temperature sensing}},
   = {2014},
   = {February},
   = {Published},
   = {1},
   = {()},
   = {microbubbles, optical resonators, optical sensing},
   = {Alexis V. Kudryashov and  Alan H. Paxton and  Vladimir S. Ilchenko and  Lutz Aschke and  Kunihiko Washio},
  pages = {89601W},
   = {San Jose, USA},
   = {{It is experimentally shown that a large thermal blue shift of up to 100 GHz/K (0.2 nm/K at a wavelength of 775 nm) can be achieved with higher order radial modes in an ethanol-filled microbubble whispering gallery mode resonator (WGR). Q-factors for the most thermally sensitive modes are typically 105, equivalent to a measurement resolution of 8.5 mK. The thermal shift rate is determined for different modes when the core of the microbubble is filled with air, water, and ethanol. The measured shifts are compared against Finite Element Model (FEM) simulations. It is also shown that, if the microbubble is in the quasi-droplet regime, the fundamental TE mode in a bubble with a 500 nm wall is estimated to experience a shift of 35 GHz/K, while the effective index is still high enough to allow efficient coupling to a tapered optical fiber. Nonetheless, at a wall thickness of 1 μm, the most sensitive modes (n = 2) observed were still strongly coupled.}},
   = {http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1840896},
  source = {IRIS}
}