scholarly journals In-fiber Mach-Zehnder interferometer for gas refractive index measurements based on a hollow-core photonic crystal fiber

2016 ◽  
Vol 24 (13) ◽  
pp. 14086 ◽  
Author(s):  
Nicholas L. P. Andrews ◽  
Rachel Ross ◽  
Dorit Munzke ◽  
Camiel van Hoorn ◽  
Andrew Brzezinski ◽  
...  
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Zehnder Interferometer ◽  
Hollow Core ◽  
Crystal Fiber ◽  
Mach Zehnder Interferometer

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 Monitoring of Carbon Dioxide Using Hollow-Core Photonic Crystal Fiber Mach–Zehnder Interferometer

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3357 ◽  
Author(s):  
Farid Ahmed ◽  
Vahid Ahsani ◽  
Kaveh Nazeri ◽  
Ehsan Marzband ◽  
Colin Bradley ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Photonic Crystal ◽  
Greenhouse Gas ◽  
Photonic Crystal Fiber ◽  
Fiber Optic ◽  
Laboratory Scale ◽  
Zehnder Interferometer ◽  
Hollow Core ◽  
Crystal Fiber ◽  
Mach Zehnder Interferometer

Monitoring of greenhouse gases is essential to understand the present state and predict the future behavior of greenhouse gas emissions. Carbon dioxide (CO2) is the greenhouse gas of most immediate concern, because of its high atmospheric concentration and long lifetime. A fiber-optic Mach–Zehnder interferometer (MZI) is proposed and demonstrated for the laboratory-scale monitoring of carbon dioxide concentration. The interferometric sensor was constructed using a small stub of hollow-core photonic crystal fiber between a lead-in and lead-out standard single mode fiber, with air-gaps at both interfaces. At room temperature and atmospheric pressure, the sensor shows the sensitivity of 4.3 pm/% CO2. The device was packaged to demonstrate the laboratory-scale leakage detection and measurement of CO2 concentration in both subsurface and aqueous environments. The experimental study of this work reveals the great potential of the fiber-optic approach for environmental monitoring of CO2.

scholarly journals Hollow-Core Photonic Crystal Fiber Mach–Zehnder Interferometer for Gas Sensing

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2807 ◽  
Author(s):  
Kaveh Nazeri ◽  
Farid Ahmed ◽  
Vahid Ahsani ◽  
Hang-Eun Joe ◽  
Colin Bradley ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Power Distribution ◽  
High Sensitivity ◽  
Zehnder Interferometer ◽  
Hollow Core ◽  
Sensing Element ◽  
Crystal Fiber ◽  
Wide Range ◽  
Mach Zehnder Interferometer

A novel and compact interferometric refractive index (RI) point sensor is developed using hollow-core photonic crystal fiber (HC-PCF) and experimentally demonstrated for high sensitivity detection and measurement of pure gases. To construct the device, the sensing element fiber (HC-PCF) was placed between two single-mode fibers with airgaps at each side. Great measurement repeatability was shown in the cyclic test for the detection of various gases. The RI sensitivity of 4629 nm/RIU was demonstrated in the RI range of 1.0000347–1.000436 for the sensor with an HC-PCF length of 3.3 mm. The sensitivity of the proposed Mach–Zehnder interferometer (MZI) sensor increases when the length of the sensing element decreases. It is shown that response and recovery times of the proposed sensor inversely change with the length of HC-PCF. Besides, spatial frequency analysis for a wide range of air-gaps revealed information on the number and power distribution of modes. It is shown that the power is mainly carried by two dominant modes in the proposed structure. The proposed sensors have the potential to improve current technology’s ability to detect and quantify pure gases.

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