Ultrasensitive Refractive-Index Sensors Based on Tapered Fiber Coupler With Sagnac Loop
| Autor: | Lianmin Mao, Longfeng Luo, Jiali Tang, Shengli Pu, Xianglong Zeng |
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| Rok vydání: | 2016 |
| Předmět: |
Optical fiber
Multi-mode optical fiber Materials science business.industry Polarization-maintaining optical fiber 02 engineering and technology 01 natural sciences Graded-index fiber Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics 020210 optoelectronics & photonics Optics Fiber Bragg grating law Fiber optic sensor 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Optoelectronics Electrical and Electronic Engineering Plastic optical fiber business Photonic-crystal fiber |
| Zdroj: | IEEE Photonics Technology Letters. 28:1073-1076 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2016.2529181 |
| Popis: | A kind of compact and highly sensitive refractive-index sensor based on reflective tapered fiber coupler is proposed. The sensing structure is fabricated by fusing and tapering a twisted optical fiber. The achieved maximum sensitivity is 3617 nm/RIU for measuring refractive index ranging from 1.33 to 1.41. Comparing with other similar reflective devices, the transmission loss is relatively low ( $\sim 2$ dB), which is assigned to the employed Sagnac loop mirror to enhance the reflection of the system. Besides the intrinsic advantages of the reflective configuration, the proposed sensing structure has the additional advantages of compactness, low-cost, and ultrahigh sensitivity. It is also promising and cost effective for other all-fiber device applications. |
| Databáze: | OpenAIRE |
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