Dual-resonance long-period grating in fiber loop mirror structure for liquid refractive index measurement
| Autor: | Tinko Eftimov, Wojtek J. Bock, Leszek R. Jaroszewicz, Anna Celebanska, R. Zawisza, Predrag Mikulic, Yasser Chinifooroshan |
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| Rok vydání: | 2018 |
| Předmět: |
Radiation
Materials science Extinction ratio business.industry Optical engineering 010401 analytical chemistry Physics::Optics Polarization-maintaining optical fiber Grating 01 natural sciences 0104 chemical sciences law.invention 010309 optics Interferometry Optics Polarization controller law 0103 physical sciences General Materials Science Sensitivity (control systems) Electrical and Electronic Engineering business Refractive index |
| Zdroj: | Opto-Electronics Review. 26:24-28 |
| ISSN: | 1230-3402 |
| DOI: | 10.1016/j.opelre.2017.11.002 |
| Popis: | An interferometric structure based on a Dual-Resonance Long-Period Grating (DRLPG) within a Fiber Loop Mirror (FLM) is presented in this paper. Its purpose is to measure the refractive index (RI) of liquid analytes. The grating is the RI sensing probe, while the FLM serves as a band-pass filter. Due to the high extinction ratio of the FLM, amplitude measurements can be obtained, allowing implementation of the differential interrogation method to establish the sensitivity of the device. The use of a polarization controller makes it possible to fine-tune the interferometric peaks with respect to the two notches of the DRLPG. Precisely aligned configuration produces a maximum sensitivity of 3871.5 dB/RIU within the RI range of 1.3333 up to 1.3419 with linear sensor response. |
| Databáze: | OpenAIRE |
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