We present the first phase-shifted polymer optical fiber Bragg grating sensor inscribed with only one KrF laser pulse. The phase shift defect was created directly during the grating inscription process by placing a very narrow blocking aperture, in the center of the UV beam. One laser pulse with a duration of 15 ns and energy 6.3 mJ is adequate to introduce a refractive index change of 0.69×10-4 in the fiber core. The high-quality produced Bragg grating structure rejects 16.3 dB transmitted power, thus providing 97.6% reflectivity, which is well suited for photonic applications. The transmission notch depth is about 10 dB and very sharp notches of 3 dB width ranging from 14 pm is reported. The temperature, strain, and pressure response of the sensor has been characterized showing promising results in applications that require high-precision measurements. The ability to inscribe these high-quality sensors effectively can significantly reduce their production cost in industry.
|Title of host publication||SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2017|
|Number of pages||4|
|Publication status||E-pub ahead of print - 1 Dec 2017|
|Event||17th SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2017 - A�guas de Lindoia, Brazil|
Duration: 27 Aug 2017 → 30 Aug 2017
|Conference||17th SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2017|
|City||A�guas de Lindoia|
|Period||27/08/17 → 30/08/17|
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Funding: Fundação para a Ciência e Tecnologia (FCT)/MEC through national funds and co-funded by FEDER – PT2020 partnership agreement under the project UID/EEA/50008/2013. C.A.F. FCT through the fellowship SFRH/BPD/109458/2015. TMarie Curie Actions of the European Union's 7th Framework Programme FP7/2007-2013/ under REA grant agreement No.
- Fiber Bragg Gratings
- Optical Sensors
- Polymer Fibers