• Absolute Absorption Cross-Section Measurement of a Submonolayer film on a silica microresonator 

      Barnes, Jack A.; Gagliardi, Gianluca; Loock, Hans-Peter (2016-02-24)
      Conventional absorption spectroscopy is not nearly sensitive enough for quantitative overtone measurements on submonolayer coatings. While cavity-enhanced absorption detection methods using microresonators have the potential ...
    • Absorption Detection Using Optical Waveguide Cavities 

      Loock, Hans-Peter; Barnes, Jack A.; Gagliardi, Gianluca; Runkai Li, Runkai; Oleschuk, Richard; Wächter, Helen (2016-03-18)
      Cavity ring-down spectroscopy is a spectroscopic method that uses a high quality optical cavity to amplify the optical loss due to the light absorption by a sample. In this presentation we highlight two applications of ...
    • Direct Sensing in Liquids Using Whispering-Gallery-Mode Droplet Resonators 

      Avino, Saverio; Krause, Anika; Zullo, Rosa; Giorgini, Antonio; Malara, Pietro; De Natale, Paolo; Loock, Hans-Peter; Gagliardi, Gianluca (2016-03-03)
      Liquid droplets suspended by the tip of a thin wire, a glass capillary, or a needle form high-Q optical resonators, thanks to surface tension. Under gravity equilibrium conditions, the maximum drop diameter is approximately ...
    • Musical Instrument Pickup Based on a Laser Locked to an Optical Fiber Resonator 

      Avino, Saverio; Barnes, Jack A.; Gagliardi, Gianluca; Gu, Xijia; Gutstein, David; Mester, James R.; Nicholaou, Costa; Loock, Hans-Peter (2016-03-11)
      A low-noise transducer based on a fiber Fabry-Perot (FFP) cavity was used as a pickup for an acoustic guitar. A distributed feedback (DFB) laser was locked to a 25 MHz-wide resonance of the FFP cavity using the Pound-Drever-Hall ...
    • Phase-Shift Cavity Ring-Down Spectroscopy on a Microsphere Resonator by Rayleigh Backscattering 

      Barnes, Jack A.; Gagliardi, Gianluca; Loock, Hans-Peter (2016-03-04)
      The optical ring-down time in a silica microsphere resonator is measured using phase-shift cavity ring-down spectroscopy. When detecting Rayleigh backscattered light that is coupled into the input waveguide it is found ...
    • Photonic Guitar Pick-up: Fiber Strain Sensors Find Applications in Music Recording 

      Barnes, Jack A.; Gagliardi, Gianluca; Loock, Hans-Peter (2016-03-07)
      In this report we give a summary of our work on the development of low-noise fiber-optic strain sensors. Three types of strain sensors were developed and were tested by attaching them to the bodies of acoustic guitars. The ...