Determination of temperature and strain by a compact optical fiber Mach-Zehnder interferometer (MZI) composed of a single-mode fiber (SMF), seven core fiber (SCF), and multimode fiber (MMF) with a fiber Bragg grating (FBG)

2021 ◽  
pp. 1-13
Author(s):  
Zhaojun Liu ◽  
Lianqing Zhu ◽  
Lidan Lu ◽  
Chunmei Shangguan ◽  
Dongliang Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Zehnder Interferometer ◽  
Bragg Grating ◽  
Multimode Fiber ◽  
Core Fiber ◽  
Mach Zehnder Interferometer

scholarly journals Optical Fiber Based Mach-Zehnder Interferometer for APES Detection

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5870
Author(s):  
Huitong Deng ◽  
Xiaoman Chen ◽  
Zhenlin Huang ◽  
Shiqi Kang ◽  
Weijia Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Optic ◽  
External Environment ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Zehnder Interferometer ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
Mach Zehnder Interferometer

A 3-aminopropyl-triethoxysilane (APES) fiber-optic sensor based on a Mach–Zehnder interferometer (MZI) was demonstrated. The MZI was constructed with a core-offset fusion single mode fiber (SMF) structure with a length of 3.0 cm. As APES gradually attaches to the MZI, the external environment of the MZI changes, which in turn causes change in the MZI’s interference. That is the reason why we can obtain the relationships between the APES amount and resonance dip wavelength by measuring the transmission variations of the resonant dip wavelength of the MZI. The optimized amount of 1% APES for 3.0 cm MZI biosensors was 3 mL, whereas the optimized amount of 2% APES was 1.5 mL.

scholarly journals Dual Demodulation of Temperature and Refractive Index Using Ring Core Fiber Based Mach-Zehnder Interferometer

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 258
Author(s):  
Weihao Yuan ◽  
Changyuan Yu
Keyword(s):  
Refractive Index ◽  
Extinction Ratio ◽  
Linear Equations ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Zehnder Interferometer ◽  
Wavelength Shift ◽  
Core Fiber ◽  
Ring Core ◽  
Mach Zehnder Interferometer

We report the ring core fiber spliced with single mode fiber and no core fiber which is used for temperature and refractive index (RI) sensing. The Mach-Zehnder interferometer (MZI) is formed with this kind of sandwich fiber structure and the maximum extinction ratio of the interference spectra reaches 27 dB with the free spectra range of 12 nm. The MZI fiber sensor is applied for temperature sensing with the sensitivity of 69 pm/°C and 0.051 dB/°C. The RI sensitivity reaches 182.07 dB/RIU and −31.44 nm/RIU with the RI ranging from 1.33 to 1.38. The RI value can be directly demodulated with the interference dip intensity which shows insensitivity to temperature. The demodulation of temperature can be achieved by using the linear equations between dip wavelength shift with the variation of temperature and RI.

A Novel In-Line Fiber Mach–Zehnder Interferometer Temperature Sensor Made of Thermally Expanded Core Fiber

2014 ◽  
Vol 635-637 ◽  
pp. 856-859 ◽  
Author(s):  
Ying Wu Zhou ◽  
Sheng Yu Chen
Keyword(s):  
Temperature Sensor ◽  
Low Cost ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Zehnder Interferometer ◽  
Core Mode ◽  
Temperature Changes ◽  
The Core ◽  
Core Fiber ◽  
Mach Zehnder Interferometer

A novel in-line fiber temperature sensor by splicing a piece of single mode fiber between two thermally expanded core fibers at their core-expanded ends is proposed and demonstrated. This structure forms an all fiber Mach–Zehnder interferometer due to the interference between the core mode and the cladding modes of the single mode fiber. The fabricated sensor is applied to measure temperature changes. The temperature sensitivity of the sensor at a length of 6.3cm is about 65.3 pm/°C. The proposed sensor is low cost, easily fabricated, and may be useful for detection of temperature.

Simultaneous Measurement of Temperature and Refractive Index Using a Fiber Bragg Grating and a Multimode Fiber

2011 ◽  
Vol 130-134 ◽  
pp. 4053-4056
Author(s):  
Zheng Rong Tong ◽  
Yang Guo ◽  
Xiu Feng Yang ◽  
Ye Cao
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Simultaneous Measurement ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Bragg Grating ◽  
Multimode Fiber ◽  
Compact Size ◽  
Good Operation

We introduce an all-fiber sensor capable of simultaneous measurement of temperature and refractive index (RI). The sensor system consists of a single mode fiber Bragg grating (FBG) and a single-mode-multimode-single-mode (SMS) structure which serves as a Mach-Zehnder interferometer (MZI), and the multimode fiber (MMF) is etched by hydrofluoric acid solution. The experimental results demonstrate that the temperature sensitivities of FBG and MZI are 0.016nm/°C and 0.093nm/°C, respectively, and the RI sensitivity of MZI achieves 226.25nm/RIU. The interesting properties of the sensor include compact size, high sensitivity and good operation linearity.

Optical fiber temperature sensor based on a Mach-Zehnder interferometer with single-mode-thin-core-single-mode fiber structure

2020 ◽  
Vol 91 (1) ◽  
pp. 015006 ◽  
Author(s):  
Qingzhuo Wang ◽  
Hongyun Meng ◽  
Xiaofeng Fan ◽  
Mengqi Zhou ◽  
Fengxiang Liu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Sensor ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Zehnder Interferometer ◽  
Fiber Structure ◽  
Mach Zehnder Interferometer

Monitoring of single-mode fiber laser heating using Rayleigh scattering and first order fs-PbP fiber Bragg grating

2017 ◽  
Author(s):  
Rudy Desmarchelier ◽  
Romain Cotillard ◽  
Nicolas Roussel ◽  
Steven Armiroli ◽  
Guillaume Laffont
Keyword(s):  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Laser Heating ◽  
Rayleigh Scattering ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Bragg Grating ◽  
First Order
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