Polarization-dependent refractometer for discrimination of temperature and ambient refractive index |
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Authors: | Kim H-J Kwon O-J Lee S B Han Y-G |
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Affiliation: | Department of Physics, Hanyang University, Seoul 133-791, South Korea. |
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Abstract: | 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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