Laser absorption spectroscopy at 2 µm inside revolver-type anti-resonant hollow core fiber

Nikodem, Michał; Gomółka, Grzegorz; Klimczak, Mariusz; Pysz, Dariusz; Buczyński, Ryszard

doi:10.1364/oe.27.014998

Cited by 26 publications

(20 citation statements)

References 32 publications

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“…In most cases, modal interferences significantly decrease the SNR. Moreover, small diameters of the hollow core drastically increase the time required to exchange the measured gas sample, and hence the response time of the sensor [48]. Fortunately, these issues have been perceived by researchers working on novel structures of HCFs.…”

Section: Pulsed Pts In Hollow-core Fibersmentioning

confidence: 99%

A Review of Photothermal Detection Techniques for Gas Sensing Applications

Krzempek

2019

Applied Sciences

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Photothermal spectroscopy (PTS) is a technique used for determining the composition of liquids, solids and gases. In PTS, the sample is illuminated with a radiation source, and the thermal response of the analyte (e.g., refractive index) is analyzed to gain information about its content. Recent advances in this unique method of detecting gaseous samples show that photothermal gas spectroscopy can be an interesting alternative to commonly used absorption techniques. Moreover, if designed properly, sensors using PTS detection technique can not only reach sensitivities comparable with other, more complex techniques, but can significantly simplify the design of the sensor. In this review, recent developments in photothermal spectroscopy of gases will be summarized and discussed.

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Section: Pulsed Pts In Hollow-core Fibersmentioning

confidence: 99%

A Review of Photothermal Detection Techniques for Gas Sensing Applications

Krzempek

2019

Applied Sciences

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“…The measured gas exchange time of our sensor is approximately five times longer than what has been reported previously with Kagome-type or other ARHCF fibers with larger core sizes and similar lengths. However, previous experiments required using higher over-pressures to exchange the gas in the fiber, thus producing pressure-broadened absorption profiles [23,27,39]. Nevertheless, the 19-s exchange time achieved in our configuration is acceptable for various gas sensing applications.…”

Section: Discussionmentioning

confidence: 96%

“…The reported sensor obtained a MDL of 65 ppbv and MDFA of 5.2 × 10 −5 , which is still inferior to the ARHCF-based sensor described in this work, utilizing a significantly simpler sensing approach and a less complex fiber structure. Gas sensing in an ARHCF was reported in [39]. The constructed sensor was based on a 1.35-m-long revolver-type antiresonant fiber (similar to our fiber) with a core diameter of 70 µm, which combined with WMS was used to target strong CO 2 transition at 2004 nm.…”

Section: Discussionmentioning

confidence: 99%

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

Jaworski

Kozioł

Krzempek

et al. 2020

Sensors

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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.

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“…In [11], laser spectroscopy inside a tubular (revolver) NC HCF was presented. A 1.35-m-long fiber with a core dimeter of 70 µm was made in the Institute of Electronic Materials Technology (Poland).…”

Section: Trace-gas Detection Using Hollow-core Fibers With Inhibited mentioning

confidence: 99%

Laser-Based Trace Gas Detection inside Hollow-Core Fibers: A Review

Nikodem

2020

Materials

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Thanks to the guidance of an optical wave in air, hollow-core fibers may serve as sampling cells in an optical spectroscopic system. This paper reviews applications of hollow-core optical fibers to laser-based gas sensing. Three types of hollow-core fibers are discussed: Hollow capillary waveguides, photonic band-gap fibers, and negative curvature fibers. Their advantages and drawbacks when used for laser-based trace gas detection are analyzed. Various examples of experimental sensing systems demonstrated in the literature over the past 20 years are discussed.

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Laser absorption spectroscopy at 2 µm inside revolver-type anti-resonant hollow core fiber

Cited by 26 publications

References 32 publications

A Review of Photothermal Detection Techniques for Gas Sensing Applications

A Review of Photothermal Detection Techniques for Gas Sensing Applications

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

Laser-Based Trace Gas Detection inside Hollow-Core Fibers: A Review

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