scholarly journals Investigation of a SPR based refractive index sensor using a single mode fiber with a large D shaped microfluidic channel

OSA Continuum ◽  
2019 ◽  
Vol 2 (11) ◽  
pp. 3008 ◽  
Author(s):  
A. K. Pathak ◽  
V. K. Singh ◽  
S. Ghosh ◽  
B. M. A. Rahman
Keyword(s):  
Refractive Index ◽  
Microfluidic Channel ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Refractive Index Sensor

Temperature-insensitive intensity-modulation liquid refractive index sensor based on fiber-optic Michelson probe structure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chen Zheng ◽  
Wenlin Feng ◽  
Xiaozhan Yang ◽  
Guojia Huang ◽  
Lian Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Beam Propagation Method ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Intensity Change ◽  
Refractive Index Sensor ◽  
Silver Mirror ◽  
Core Fiber ◽  
Core Modes ◽  
Theoretical Results

Abstract A novel liquid refractive index sensor based on the connected single-mode fiber (SMF), no-core fiber (NCF), four-core fiber (FCF), and silver mirror (SM) to form an SMF–NCF–FCF–SM Michelson probe structure is proposed and fabricated. The change of light field in the probe structure has been simulated by the light-beam propagation method. The theoretical results show that light is excited in the NCF and couples into the cores and cladding of FCF at the junction of NCF and FCF. The interference fringes are generated between the cladding modes and core modes of FCF. The sensitivities of the probe in NaCl, sucrose, and glycerol are 171.75 dB/RIU, 121.41 dB/RIU, and 207.50 dB/RIU, respectively. The temperature sensitivity is 0.05 nm/°C, and the intensity change of temperature (≤0.046 dB/°C) is very small and has little effect on the liquid refractive index. Thus, the cross-sensitivity of temperature for the liquid refractive index can be removed. The proposed probe structure has the advantages of easy fabrication, good stability, and linear response, having potential application in the liquid refractive index monitoring environments.

Refractive index sensor based on ultrafine tapered single-mode nocladding single-mode fiber structure

2019 ◽  
Vol 48 ◽  
pp. 297-302 ◽  
Author(s):  
Mizhen Zhang ◽  
Guixian Zhu ◽  
Lidan Lu ◽  
Xiaoping Lou ◽  
Lianqing Zhu
Keyword(s):  
Refractive Index ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Refractive Index Sensor ◽  
Fiber Structure

scholarly journals Intensity Demodulated Refractive Index Sensor Based on Front-Tapered Single-Mode-Multimode-Single-Mode Fiber Structure

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2396 ◽  
Author(s):  
Jing Kang ◽  
Jiuru Yang ◽  
Xudong Zhang ◽  
Chunyu Liu ◽  
Lu Wang
Keyword(s):  
Refractive Index ◽  
High Stability ◽  
Beam Propagation Method ◽  
Single Mode ◽  
Relative Sensitivity ◽  
Single Mode Fiber ◽  
Continuous Operation ◽  
Refractive Index Sensor ◽  
Fiber Structure ◽  
Drawing Technique

A novel intensity demodulated refractive index (RI) sensor is theoretically and experimentally demonstrated based on the front-tapered single-mode-multimode-single-mode (FT-SMS) fiber structure. The front taper is fabricated in a section of multimode fiber by flame-heated drawing technique. The intensity feature in the taper area is analyzed through the beam propagation method and the comprehensive tests are then conducted in terms of RI and temperature. The experimental results show that, in FT-SMS, the relative sensitivity is −342.815 dB/RIU in the range of 1.33~1.37. The corresponding resolution reaches 2.92 × 10−5 RIU, which is more than four times higher than that in wavelength demodulation. The temperature sensitivity is 0.307 dB/°C and the measurement error from cross-sensitivity is less than 2 × 10−4. In addition, fabricated RI sensor presents high stability in terms of wavelength (±0.045 nm) and intensity (±0.386 dB) within 2 h of continuous operation.

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