Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Zhenhui Du"'
Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 4, Pp 1-7 (2022)
Hollow waveguide (HWG) as an absorption cell for gas spectral sensing has the advantages of low transmission loss, fast response speed, and high path length to volume ratio. However, due to the tubular structure of the HWG, the spontaneous emission g
Externí odkaz:
https://doaj.org/article/84415787ab104e6095684884d0ee5531
Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 2, Pp 1-7 (2022)
The loss propertiesof semiconductor laser beams propagating in hollow waveguides (HWGs) are crucial in several applications. The attenuation coefficient of the distributed feedback quantum cascade laser (DFB-QCL) in the HWG was quantitatively determi
Externí odkaz:
https://doaj.org/article/e19109b2e0f84e9ca52e01e0dfaa89fd
Publikováno v:
Remote Sensing, Vol 12, Iss 17, p 2771 (2020)
Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from h
Externí odkaz:
https://doaj.org/article/6059646962ba4608becde2648d081046
Publikováno v:
Applied Sciences, Vol 9, Iss 2, p 338 (2019)
The vast majority of gaseous chemical substances exhibit fundamental rovibrational absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light by these fundamental bands provides a nearly universal means for their
Externí odkaz:
https://doaj.org/article/bf326c0e89e14400b491a8c4722bf07c
Publikováno v:
Sensors, Vol 18, Iss 11, p 3762 (2018)
Imprecise measurements present universally due to variability in the measurement error. We devised a very simple membership function to evaluate fuzzily the quality of optical sensing with a small dataset, where a normal distribution cannot be assume
Externí odkaz:
https://doaj.org/article/bb2db37b669947eabc127929b4b0934e
Publikováno v:
Sensors, Vol 18, Iss 10, p 3216 (2018)
This paper presents a mid-infrared dimethyl sulfide (CH3SCH3, DMS) sensor based on tunable laser absorption spectroscopy with a distributed feedback interband cascade laser to measure DMS in the atmosphere. Different from previous work, in which only
Externí odkaz:
https://doaj.org/article/e68a07424f0e457b96dfe3cc31c2e365
Publikováno v:
Sensors, Vol 17, Iss 2, p 379 (2017)
Detection of methyl mercaptan (CH3SH) is essential for environmental atmosphere assessment and exhaled-breath analysis. This paper presents a sensitive CH3SH sensor based on wavelength modulation spectroscopy (WMS) with a mid-infrared distributed fee
Externí odkaz:
https://doaj.org/article/55639ed3614e4518b07d2ac3dcdc89fe
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 72:1-8
Publikováno v:
Spectroscopy. :42-48
Because infrared (IR) absorption spectroscopy technology can offer high sensitivity and strong anti-interference capabilities, it is widely used in gas detection. To solve the problem of spectrum line aliasing in gas detection, this study examined th
Publikováno v:
IEEE Photonics Technology Letters. 34:761-764