Multipoint Remote Methane Measurement System Based on Spectrum Absorption and Reflective TDM

Sun, Chao; Chen, Youping; Zhang, Gang; Wang, Feng; Liu, Guangsen; Ding, Jianjun

doi:10.1109/lpt.2016.2601625

Cited by 14 publications

(2 citation statements)

References 11 publications

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“…There are three measurement points along a 4 km optical length in the experiment. A 2% MDL reduction is achieved, and the linear correlation coefficients are 0.999, 0.996, and 0.989 at 0 km, 2 km, and 4 km, respectively [15]. Liu et al proposed and demonstrated a multi-channel fiber surface plasmon resonance sensor based on time-division multiplexing (TDM) by using the multi-core fiber.…”

Section: Introductionmentioning

confidence: 99%

Multi-Component and Multi-Point Trace Gas Sensing in Wavelength Modulation Spectroscopy Based on Wavelength Stabilization

Wang

Chang

et al. 2019

Photonic Sens

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Multi-component and multi-point trace gas sensing in the wavelength modulation spectroscopy is demonstrated based on the frequency-division multiplexing and time-division multiplexing technology. A reference photodetector is connected in series with a reference gas cell with the constant concentration to measure the second-harmonics peak of the components for wavelength stabilization in real time. The central wavelengths of the distributed feedback lasers are locked to the target gas absorption centers by the reference second-harmonics signal using a digital proportional-integral-derivative controller. The distributed feedback lasers with different wavelengths and modulation frequencies are injected into the gas cell to achieve multi-components gas measurement by the frequency-division multiplexing technology. In addition, multi-point trace gas sensing is achieved by the time-division multiplexing technology using a photoswitch and a relay unit. We use this scheme to detect methane (CH 4 ) at 1650.9 nm and water vapor (H 2 O) at 1368.597 nm as a proof of principle with the gas cell path length of 10 cm. The minimum detection limits achieved for H 2 O and CH 4 are 1.13 ppm and 11.85 ppm respectively, with three-point gas cell measurement; thus 10.5-fold and 10.1-fold improvements are achieved in comparison with the traditional wavelength modulation spectroscopy. Meanwhile, their excellent R-square values reach 0.9983 and 0.99564 for the concentration ranges of 500 ppm to 2000 ppm and 800 ppm to 2700 ppm, respectively.

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Section: Introductionmentioning

confidence: 99%

Multi-Component and Multi-Point Trace Gas Sensing in Wavelength Modulation Spectroscopy Based on Wavelength Stabilization

Wang

Chang

et al. 2019

Photonic Sens

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“…Optical sensing techniques allow for the possibility of making remote [ 1 ] and non-invasive measurements [ 2 ], as well as working in hazardous environments [ 3 ]. These, and many other significant advantages over other detection technologies, have attracted the attention of scientists over the last decades [ 4 , 5 ], and hence this technology has experienced a high development.…”

Section: Introductionmentioning

confidence: 99%

Luminescence-Based Optical Sensors Fabricated by Means of the Layer-by-Layer Nano-Assembly Technique

Elosúa

Matı́as

et al. 2017

Sensors

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Luminescence-based sensing applications range from agriculture to biology, including medicine and environmental care, which indicates the importance of this technique as a detection tool. Luminescent optical sensors are required to be highly stable, sensitive, and selective, three crucial features that can be achieved by fabricating them by means of the layer-by-layer nano-assembly technique. This method permits us to tailor the sensors′ properties at the nanometer scale, avoiding luminophore aggregation and, hence, self-quenching, promoting the diffusion of the target analytes, and building a barrier against the undesired molecules. These characteristics give rise to the fabrication of custom-made sensors for each particular application.

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Bio-microelectromechanical Systems (BioMEMS) in Bio-sensing Applications-Luminescence Detection Strategies

Cerda-Kipper

Hosseini

2020

BioMEMS

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Multipoint Remote Methane Measurement System Based on Spectrum Absorption and Reflective TDM

Cited by 14 publications

References 11 publications

Multi-Component and Multi-Point Trace Gas Sensing in Wavelength Modulation Spectroscopy Based on Wavelength Stabilization

Multi-Component and Multi-Point Trace Gas Sensing in Wavelength Modulation Spectroscopy Based on Wavelength Stabilization

Luminescence-Based Optical Sensors Fabricated by Means of the Layer-by-Layer Nano-Assembly Technique

Bio-microelectromechanical Systems (BioMEMS) in Bio-sensing Applications-Luminescence Detection Strategies

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