Characterization of external refractive index sensitivity of a photonic crystal fiber long-period grating

2015 ◽  
Vol 13 (7) ◽  
pp. 070501-70503 ◽  
Author(s):  
Fei Tian Fei Tian ◽  
Jiri Kanka Jiri Kanka ◽  
Henry Du Henry Du
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Long Period Grating ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Long Period ◽  
Index Sensitivity

Photonic Crystal Fiber Mach-Zehnder Interferometer Based on Refractive Index Sensitivity of Cladding Corrosion Optimization

2019 ◽  
Vol 56 (17) ◽  
pp. 170629
Author(s):  
黄国家 Guojia Huang ◽  
马诗章 Shizhang Ma ◽  
王恋 Lian Wang ◽  
李仕平 Shiping Li ◽  
冯文林 Wenlin Feng
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Zehnder Interferometer ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Index Sensitivity ◽  
Mach Zehnder Interferometer

scholarly journals Research on Fused Tapered Photonic Crystal Fiber Sensor Based on the Method of Intermittent Cooling

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Guangwei Fu ◽  
Xinghu Fu ◽  
Peng Guo ◽  
Yushen Ji ◽  
Weihong Bi
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Glycerol Solution ◽  
Transmission Spectra ◽  
Refractive Index Sensitivity ◽  
Fringe Contrast ◽  
Crystal Fiber ◽  
Heating And Cooling ◽  
Index Sensitivity

Based on the intermittent cooling method, a fused tapered Photonic Crystal Fiber (PCF) interferometer is proposed. In the process of tapering, stop heating and wait for cooling at different taper length. Repeat heating and cooling, until taper goes to the expected length. Compared with the ordinary fused tapered method, the fringe contrast of the transmission spectra of this sensor is 15.06 dB. The transmission spectra in different concentrations of glycerol solution are obtained, and the temperature cross-sensitivity of the sensor is studied. The experimental results show that as the external refractive index increases, the transmission spectra of the sensor shift to longer wavelength. In the measuring glycerol solution, the refractive index sensitivity of the sensor can achieve 797.674 nm/RIU, and the temperature sensitivity is only 0.00125 nm/°C.

Sensing Characteristics of Long-Period Grating Inscribed in Grapefruit Photonic Crystal Fiber by Femtosecond Laser

2014 ◽  
Vol 513-517 ◽  
pp. 4231-4234
Author(s):  
Yuan Wei ◽  
Yu Jie Du
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Femtosecond Laser ◽  
Photonic Crystal Fiber ◽  
Resonant Wavelength ◽  
Long Period Grating ◽  
Crystal Fiber ◽  
Long Period ◽  
Surrounding Refractive Index ◽  
Novel Method

A novel method for fabricating long period grating in grapefruit photonic crystal fiber (GPCF) is proposed and demonstrated. An 800nm femtosecond laser is adopted to scan a section of GPCF periodically point-by-point, resulting in effective refractive index periodic demodulation. High resonance of ~17dB is obtained with a grating length of 30 mm. The temperature sensitivity of resonant wavelength 0.03 nm/°C is obtained from 20°C to 120 °C. In addition, the relationship between resonant wavelength and surrounding refractive index (SRI), when LPFG immersed in refractive index of solution of different index, is also researched.

Numerical investigation of gold plated single-core photonic crystal fiber-based refractive index sensor

2021 ◽  
Author(s):  
Monika Kiroriwal ◽  
Poonam Singal
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Refractive Index Sensor ◽  
Geometrical Parameters ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Simple Geometry ◽  
Bio Imaging ◽  
Index Sensitivity

Surface plasmon resonance (SPR)-based single-core photonic crystal fiber (PCF) biosensor is investigated with external gold coating. All the geometrical parameters such as a gold layer, an analyte layer, a lattice period and cladding air holes are optimized to enhance the sensing ability of the sensor by introducing the finite element method. The designed sensor is able to achieve the highest amplitude sensitivity (AS) of 2258.95 RIU[Formula: see text] with an acceptable refractive index sensitivity (RIS) of 6000 nm/RIU over the analyte refractive index (ARI) span of 1.31–1.40. This sensor can detect a slight index alteration in the sensing medium using a resolution of [Formula: see text] and a high figure of merit (FOM) of 79.01. With the enhanced modal behavior with simple geometry, the resulting sensor can be suitable for real-time monitoring in biological, biochemical and bio-imaging applications.

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