Polymer optical fiber for large strain measurement based on multimode interference

2012 ◽  
Vol 37 (20) ◽  
pp. 4308 ◽  
Author(s):  
Jie Huang ◽  
Xinwei Lan ◽  
Hanzheng Wang ◽  
Lei Yuan ◽  
Tao Wei ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Strain Measurement ◽  
Large Strain ◽  
Multimode Interference ◽  
Polymer Optical Fiber

Calibration of a single-mode polymer optical fiber large-strain sensor

2009 ◽  
Vol 20 (3) ◽  
pp. 034016 ◽  
Author(s):  
Sharon Kiesel ◽  
Kara Peters ◽  
Tasnim Hassan ◽  
Mervyn Kowalsky
Keyword(s):  
Optical Fiber ◽  
Large Strain ◽  
Strain Sensor ◽  
Single Mode ◽  
Polymer Optical Fiber

Sensor for measuring extremely large strain based on bending Polymer optical fiber

2017 ◽  
Vol 60 (2) ◽  
pp. 301-306 ◽  
Author(s):  
Tao Chen ◽  
Jun Tu ◽  
Xiaochun Song ◽  
Zhihong Li
Keyword(s):  
Optical Fiber ◽  
Large Strain ◽  
Polymer Optical Fiber

Single-Mode Polymer Optical Fiber Sensors for Large Strain Applications

2006 ◽  
Vol 969 ◽  
Author(s):  
Sharon M. Kiesel ◽  
Kara Peters ◽  
Tasnim Hassan ◽  
Mervyn Kowalsky
Keyword(s):  
Optical Fiber ◽  
Mechanical Response ◽  
Large Strain ◽  
Small Deformation ◽  
Single Mode ◽  
Second Order ◽  
Secant Modulus ◽  
Polymer Optical Fiber ◽  
Yield Strain ◽  
Deformation Regime

AbstractThis paper characterizes an intrinsic, single-mode, polymer optical fiber (POF) sensor for use in large-strain applications such as civil infrastructures subjected to earthquake loading or systems with large shape changes such as morphing aircraft. The opto-mechanical response was formulated for the POF including a second-order (in strain) photoelastic effect as well as a second-order (in strain) solution for the deformation of the POF during loading. It is shown that four independent mechanical and opto-mechanical constants are required for the small deformation regime and six additional independent mechanical and opto-mechanical constants are required for the large deformation regime. The mechanical nonlinearity of a typical polymer optical fiber was experimentally measured in tension at various loading rates. The secant modulus of elasticity measured at small strains, roughly up to 2% strain, was measured to be ∼4GPa whereas at larger strains, roughly up to 4.5% strain, the secant modulus was measured to be ∼4.8GPa. As the loading rate was increased the yield strain increased, ranging from ∼3.2% at 1mm/min to ∼5% at 305 mm/min.

Response of Polymer Optical Fiber Sensor for Large-Strain Applications

2006 ◽  
Author(s):  
Sharon Kiesel ◽  
Kara Peters ◽  
Tasnim Hassan ◽  
Mervyn Kowalsky
Keyword(s):  
Optical Fiber ◽  
Large Strain ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Polymer Optical Fiber

scholarly journals Polycarbonate mPOF-Based Mach–Zehnder Interferometer for Temperature and Strain Measurement

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6643
Author(s):  
Xiaoyu Yue ◽  
Haijin Chen ◽  
Hang Qu ◽  
Rui Min ◽  
Getinet Woyessa ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Measurement ◽  
Temperature Sensitivity ◽  
Strain Measurement ◽  
Linear Response ◽  
Force Measurement ◽  
Low Cost ◽  
Unit Length ◽  
Polymer Optical Fiber ◽  
Increasing Temperature

In this paper, an endlessly single mode microstructured polymer optical fiber (mPOF) in a Mach–Zehnder (M–Z) interferometer configuration is demonstrated for temperature and strain measurement. Because there is no commercial splicer applied for POF-silica optical fiber (SOF) connectorization, prior to the M–Z interferometric sensing, we introduce an imaging projecting method to align a polycarbonate mPOF to a SOF and then the splice is cured permanently using ultraviolet (UV) glue. A He-Ne laser beam at 632.8 nm coupled in a SOF is divided by a 1 × 2 fiber coupler to propagate in two fiber arms. A piece of mPOF is inserted in one arm for sensing implementation and the interference fringes are monitored by a camera. For non-annealed fiber, the temperature sensitivity is found to be 25.5 fringes/°C for increasing temperature and 20.6 fringes/°C for decreasing temperature. The converted sensitivity per unit length is 135.6 fringes/°C/m for increasing temperature, which is twice as much as the silica fiber, or 852.2 rad/°C/m (optical phase change versus fiber temperature), which is more than four times as much as that for the PMMA fiber. To solve the sensitivity disagreement, the fiber was annealed at 125 °C for 36 h. Just after the thermal treatment, the temperature measurement was conducted with sensitivities of 16.8 fringes/°C and 21.3 fringes/°C for increasing and decreasing process, respectively. One month after annealing, the linear response was improved showing a temperature sensitivity of ~20.7 fringes/°C in forward and reverse temperature measurement. For the strain measurement based on non-annealed fiber, the sensitivity was found to be ~1463 fringes/%ε showing repeatable linear response for forward and reverse strain. The fiber axial force sensitivity was calculated to be ~2886 fringes/N, showing a force measurement resolution of ~3.47 × 10−4 N. The sensing methodology adopted in this work shows several advantages, such as very low cost, high sensitivity, a straightforward sensing mechanism, and ease of fabrication.

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