Polarization-dependent refractometer for discrimination of temperature and ambient refractive index

Department of Physics, Hanyang University, Seoul 133-791, South Korea.
Optics Letters (Impact Factor: 3.29). 06/2012; 37(11):1802-4. DOI: 10.1364/OL.37.001802
Source: PubMed


Transmission characteristics of polarization-dependent refractometer based on a surface long-period grating (SLPG) inscribed in a D-shaped photonic crystal fiber (PCF) are investigated. The birefringence of SLPG produces the separation of transmission spectra for TE and TM polarization modes. We also measure the sensitivities of PCF-based SLPG to temperature and external refractive index change depending on the input polarization states. The SLPG-based sensor exhibits different temperature and ambient index sensitivities corresponding to TE and TM polarization modes. Therefore, the SLPG inscribed in D-shaped PCFs can effectively discriminate temperature and ambient index sensitivities.

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    • "This result shows that the sensor has a rather strong temperature dependence. This temperature-dependent resonance peak shift is expected and it has been discussed in previously published work [19], [20]. However since the resonant peak monotonically redshifts with temperature, it is possible to apply a correction factor to mitigate the temperature induced errors. "
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