Refractometer based on fiber Bragg grating Fabry-Pérot cavity embedded with a narrow microchannel.

نویسندگان

  • Kaiming Zhou
  • Zhijun Yan
  • Lin Zhang
  • Ian Bennion
چکیده

We report on inscription of microchannels of different widths in optical fiber using femtosecond (fs) laser inscription assisted chemical etching and the narrowest channel has been created with a width down to only 1.2μm. Microchannels with 5μm and 35μm widths were fabricated together with Fabry-Pérot (FP) cavities formed by UV laser written fiber Bragg gratings (FBGs), creating high function and linear response refractometers. The device with a 5μm microchannel has exhibited a refractive index (RI) detection range up to 1.7, significantly higher than all fiber grating RI sensors. In addition, the microchannel FBG FP structures have been theoretically simulated showing excellent agreement with experimental measured characteristics.

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عنوان ژورنال:
  • Optics express

دوره 19 12  شماره 

صفحات  -

تاریخ انتشار 2011