Highly sensitive and stable photothermal gas sensor with a hollow-core fiber Fabry-Perot cavity

2021 ◽  
Author(s):  
Haihong Bao ◽  
Yingzhen Hong ◽  
Wei Jin ◽  
Hoilut Ho ◽  
Shoufei Gao ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Highly Sensitive ◽  
Fabry Perot ◽  
Core Fiber

Hollow-core fiber Fabry–Perot photothermal gas sensor

2016 ◽  
Vol 41 (13) ◽  
pp. 3025 ◽  
Author(s):  
Fan Yang ◽  
Yanzhen Tan ◽  
Wei Jin ◽  
Yuechuan Lin ◽  
Yun Qi ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Fabry Perot ◽  
Core Fiber

scholarly journals Highly Sensitive Temperature Sensing Performance of a Microfiber Fabry-Perot Interferometer with Sealed Micro-Spherical Reflector

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 773 ◽  
Author(s):  
Jin Li ◽  
Juntong Yang ◽  
Jinna Ma
Keyword(s):  
Implantable Sensors ◽  
Hollow Core ◽  
Promising Candidate ◽  
Air Cavity ◽  
Temperature Probe ◽  
Spherical Reflector ◽  
Highly Sensitive ◽  
Fabry Perot ◽  
Core Fiber ◽  
High Temperature Sensitivity

A temperature probe has been proposed by inserting a microfiber taper into a silica hollow core fiber with a microsphere end. The sealed air cavity in the microsphere and the inserted microfiber acted as the two reflectors of a Fabry-Perot interferometer, respectively. The contribution of both microfiber diameter and cavity length on the interference spectra was analyzed and discussed in detail. The temperature change was experimentally determined by monitoring the wavelength location of the special resonance dip. By filling the air cavity with poly-dimethylsiloxane (PDMS), a high temperature sensitivity of 3.90 nm/°C was experimentally demonstrated. This temperature probe with the diameter of 150 μm and length of 10 mm will be a promising candidate for exploring the miniature or implantable sensors.

scholarly journals Liquid level sensor based on dynamic Fabry–Perot interferometers in processed capillary fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pablo Roldán-Varona ◽  
Rosa Ana Pérez-Herrera ◽  
Luis Rodríguez-Cobo ◽  
Luis Reyes-González ◽  
Manuel López-Amo ◽  
...  
Keyword(s):  
Optical Fiber Sensor ◽  
Liquid Level ◽  
Hollow Core ◽  
Immiscible Liquids ◽  
Fabry Perot ◽  
Detection Mode ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor ◽  
Silica Capillary

AbstractIn this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary hollow-core fiber is used. The fiber, with a sensing length of 1.55 mm, has been processed with a femtosecond laser, so that it incorporates four holes in its structure. In this way, the liquid enters the air core, and it is possible to perform the sensing through the Fabry–Perot cavities that the liquid generates. The detection mode is in reflection. With a resolution of 4 μm (liquid level), it is in the state of the art of this type of sensor. The system is designed so that in the future it will be capable of measuring the level of immiscible liquids, that is, liquids that form stratified layers. It can be useful to determine the presence of impurities in tanks.

scholarly journals Antiresonant Hollow-Core Fiber-Based Dual Gas Sensor for Detection of Methane and Carbon Dioxide in the Near- and Mid-Infrared Regions

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3813 ◽  
Author(s):  
Piotr Jaworski ◽  
Paweł Kozioł ◽  
Karol Krzempek ◽  
Dakun Wu ◽  
Fei Yu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Simultaneous Detection ◽  
Hollow Core ◽  
Mid Infrared ◽  
Sensing Applications ◽  
Core Fiber ◽  
Sensor Configuration ◽  
Carbon Dioxide Co2

In this work, we present for the first time a laser-based dual gas sensor utilizing a silica-based Antiresonant Hollow-Core Fiber (ARHCF) operating in the Near- and Mid-Infrared spectral region. A 1-m-long fiber with an 84-µm diameter air-core was implemented as a low-volume absorption cell in a sensor configuration utilizing the simple and well-known Wavelength Modulation Spectroscopy (WMS) method. The fiber was filled with a mixture of methane (CH4) and carbon dioxide (CO2), and a simultaneous detection of both gases was demonstrated targeting their transitions at 3.334 µm and 1.574 µm, respectively. Due to excellent guidance properties of the fiber and low background noise, the proposed sensor reached a detection limit down to 24 parts-per-billion by volume for CH4 and 144 parts-per-million by volume for CO2. The obtained results confirm the suitability of ARHCF for efficient use in gas sensing applications for over a broad spectral range. Thanks to the demonstrated low loss, such fibers with lengths of over one meter can be used for increasing the laser-gas molecules interaction path, substituting bulk optics-based multipass cells, while delivering required flexibility, compactness, reliability and enhancement in the sensor’s sensitivity.

scholarly journals Fabry-Pérot Cavity Formed with Dielectric Metasurfaces in a Hollow-Core Fiber

ACS Photonics ◽  
2017 ◽  
Vol 5 (2) ◽  
pp. 337-341 ◽  
Author(s):  
Jeremy Flannery ◽  
Rubayet Al Maruf ◽  
Taehyun Yoon ◽  
Michal Bajcsy
Keyword(s):  
Hollow Core ◽  
Fabry Perot ◽  
Core Fiber

scholarly journals In-Line Mach–Zehnder Interferometers Based on a Capillary Hollow-Core Fiber Using Vernier Effect for a Highly Sensitive Temperature Sensor

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5471
Author(s):  
Sigifredo Marrujo-García ◽  
Iván Hernández-Romano ◽  
Daniel A. May-Arrioja ◽  
Vladimir P. Minkovich ◽  
Miguel Torres-Cisneros
Keyword(s):  
Temperature Sensitivity ◽  
Temperature Sensor ◽  
Hollow Core ◽  
Multimode Fibers ◽  
Highly Sensitive ◽  
Attractive Candidate ◽  
Working Principle ◽  
Core Fiber ◽  
Vernier Effect ◽  
Insight Into

In this paper, we propose a highly sensitive temperature sensor based on two cascaded Mach–Zehnder interferometers (MZIs) that work using the Vernier effect. The all-fiber MZIs were assembled by splicing a segment of capillary hollow-core fiber (CHCF) between two sections of multimode fibers (MMFs). This cascaded configuration exhibits a temperature sensitivity of 1.964 nm/°C in a range from 10 to 70 °C, which is ~67.03 times higher than the sensitivity of the single MZI. Moreover, this device exhibits a high-temperature resolution of 0.0153 °C. A numerical analysis was carried out to estimate the devices’ temperature sensitivity and calculate the magnification of the sensitivity produced by the Vernier effect. The numerical results have an excellent agreement with the experimental results and provide a better insight into the working principle of the MZI devices. The sensor’s performance, small size, and easy fabrication make us believe that it is an attractive candidate for temperature measurement in biological applications.

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