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Your search keyword '"Sun, Haojia"' showing total 6 results
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6 results on '"Sun, Haojia"'

2. Safety Evaluation Model Detection of Jacking Form Work System Based on BP Neural Network

Author

Jia, Shilong, Sha, Yi, Wang, Xiangxu, Zhong, Hanjie, Ren, Juncheng, Sun, Haojia, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Tuns, Ioan, editor, Muntean, Radu, editor, Radu, Dorin, editor, Cazacu, Christiana, editor, and Gălățanu, Teofil, editor

Published
2024
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6. Highly sensitive QEPAS sensor for sub-ppb N2O detection using a compact butterfly-packaged quantum cascade laser.

Author

Yang, Min, Wang, Zhen, Sun, Haojia, Hu, Mengyuan, Yeung, Pak To, Nie, Qinxue, Liu, Shanliang, Akikusa, Naota, and Ren, Wei

Subjects
QUANTUM cascade lasers, PHOTOACOUSTIC spectroscopy, DETECTORS, GAS detectors, TRACE gases, MID-infrared lasers, NITROUS oxide
Abstract

We report a mid-infrared quartz-enhanced photoacoustic sensor for highly sensitive nitrous oxide (N2O) detection using a 4.56 µm quantum cascade laser (QCL) with a butterfly package type. This new type of QCL features a compact size (30 mm × 12.7 mm × 13 mm), low threshold current (< 120 mA) at room temperature, and relatively high emission power (> 100 mW), which are suitable for portable trace gas sensor development. In this work, the QCL beam is directly coupled to the QEPAS detection module by using only one focusing lens. By measuring N2O mixtures with different concentrations (120 ppb to 3.16 ppm), the developed sensor shows a good linearity (R-square value of 0.999) and a minimum detection limit of below 1 ppb. The sensor has been successfully deployed for ambient air measurement, demonstrating the applicability and promising potential of using this QCL with butterfly package for various gas sensing applications. [ABSTRACT FROM AUTHOR]

Published
2024
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