Bragg Gratings in Suspended-Core Photonic Microcells for High-Temperature Applications
| Autor: | Jun He, Congzhe Zhang, Wei Jin, Ying Wang, Jingchuan Zhang, Chao Wang, Yuechuan Lin, Yiping Wang, Changrui Liao |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Physics::Optics 02 engineering and technology Grating 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Fiber Bragg grating Fiber optic sensor law Fiber laser 0103 physical sciences Femtosecond Optoelectronics Photonics 0210 nano-technology business Photonic-crystal fiber |
| Zdroj: | Journal of Lightwave Technology. 36:2920-2924 |
| ISSN: | 1558-2213 0733-8724 |
| DOI: | 10.1109/jlt.2018.2831258 |
| Popis: | We report a novel type-II photonic crystal fiber Bragg grating for high-temperature applications. The Bragg grating is inscribed in a low-loss in-fiber structure named suspended-core photonic microcell, which is postprocessed from a commercial pure-silica photonic crystal fiber. Grating samples with core diameters of about 4 μm were made by using a focused near-infrared femtosecond laser and a phase mask, and then tested in a tube furnace from room temperature to about 1200 °C. The thermal response of the Bragg resonant wavelength was measure to be about 12 and 16 pm/°C, respectively, at the temperature around 100 °C and 1000 °C. The grating spectrum remained stable in a 10-h isothermal annealing at 1000 °C and started decaying at about 1120 °C with the rate of about 0.02 dB/min. This type of grating possesses flexibilities in both waveguide and grating structure design, exhibits good high-temperature performance, hence would be promising platform for building wavelength-division-multiplexed fiber sensors and tunable devices with a wide working temperature range. |
| Databáze: | OpenAIRE |
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