Mach-Zehnder interferometer applied to the study polymers relative humidity response

2018 ◽  
Author(s):  
Sergio Calixto-Carrera ◽  
Maria Elena Calixto Olalde ◽  
Jose Hernandez-Barajas ◽  
Omar Vazquez Espitia
Keyword(s):  
Relative Humidity ◽  
Zehnder Interferometer ◽  
Humidity Response ◽  
Mach Zehnder Interferometer

Optical Fiber Relative Humidity Sensor Based on Inline Mach–Zehnder Interferometer With ZnO Nanowires Coating

2016 ◽  
Vol 16 (2) ◽  
pp. 312-316 ◽  
Author(s):  
Asiah Lokman ◽  
Hamzah Arof ◽  
Sulaiman Wadi Harun ◽  
Zuraidah Harith ◽  
Hartini Ahmad Rafaie ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Optical Fiber ◽  
Humidity Sensor ◽  
Zno Nanowires ◽  
Zehnder Interferometer ◽  
Relative Humidity Sensor ◽  
Mach Zehnder Interferometer

scholarly journals Ammonia Gas Sensor Based on Graphene Oxide-Coated Mach-Zehnder Interferometer with Hybrid Fiber Structure

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3886
Author(s):  
Xiaofeng Fan ◽  
Shuying Deng ◽  
Zhongchao Wei ◽  
Faqiang Wang ◽  
Chunhua Tan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Relative Humidity ◽  
Gas Adsorption ◽  
Zehnder Interferometer ◽  
Wavelength Shift ◽  
Multimode Fiber ◽  
Core Diameter ◽  
Ammonia Gas ◽  
Cladding Mode ◽  
Mach Zehnder Interferometer

A graphene oxide-coated in-fiber Mach-Zehnder interferometer (MZI) formed with a multimode fiber-thin core fiber-multimode fiber (MMF-TCF-MMF) is proposed and experimentally demonstrated for ammonia gas (NH3) sensing. The MZI structure is composed of two segments of MMF of length 2 mm, with a flame-tapered TCF between them as the sensing arm. The MMFs act as mode couplers to split and recombine light owing to the core diameter mismatch with the other fibers. A tapered TCF is formed by the flame melting taper method, resulting in evanescent wave leakage. A layer of graphene oxide (GO) is applied to the tapered region of the TCF to achieve gas adsorption. The sensor operates on the principle of changing the effective refractive index of the cladding mode of a fiber through changing the conductivity of the GO coating by adsorbed NH3 molecules, which gives rise to a phase shift and shows as the resonant dip shifts in the transmission spectrum. So the concentration of the ammonia gas can be obtained by measuring the dip shift. A wavelength-shift sensitivity of 4.97 pm/ppm with a linear fit coefficient of 98.9% is achieved for ammonia gas concentrations in the range of 0 to 151 ppm. In addition, we performed a repetitive dynamic response test on the sensor by charging/releasing NH3 at concentration of 200 ppm and a relative humidity test in a relative humidity range of 35% to 70%, which demonstrates the reusability and stability of the sensor.

Optical-TDMA LAN incorporating packaged integrated Mach-Zehnder interferometer channel selector

1997 ◽  
Vol 33 (16) ◽  
pp. 1404 ◽  
Author(s):  
P. Gunning ◽  
J.K. Lucek ◽  
D. Nesset ◽  
J.V. Collins ◽  
C.W. Ford ◽  
...  
Keyword(s):  
Zehnder Interferometer ◽  
Mach Zehnder Interferometer
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