Development of VCSEL laser detection system for methane gas

Huang, Shuo; Wang, Biao; Cheng, Lin-xiang; Yu, Yong-bo; Dai, Tong-xin; Lian, Hou-quan

doi:10.1117/12.2603010

Cited by 1 publication

(1 citation statement)

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“…High concentrations of methane can also contribute to air pollution, which is hazardous to human health. Therefore, timely monitoring of methane concentrations and rapid localization of leaks are crucial for environmental protection, air quality maintenance, industrial accident prevention, and personal safety risk reduction [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Highly Responsive, Miniaturized Methane Telemetry Sensor Based on Open-Path TDLAS

Wu,

Yang,

Shi

et al. 2023

Photonics

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This paper proposes the design of a highly responsive, compact, non-contact methane telemetry sensor, employing the open-path tunable diode laser absorption spectroscopy (OP-TDLAS) technology. The sensor uses the dual-core structure of FPGA and ARM to achieve high-speed methane telemetry at 100 KHz repeated modulation frequency for the first time with a non-cooperate target, and a higher gas responsive time of 1.8 ms was achieved than previously reported. Moreover, the optical system (L × W × H: 68.8 × 52 × 62.7 mm) and the electronic system (L × W: 70 × 50 mm) make the sensor more compact. Methane gas samples of varying integral concentrations were examined at a distance of 20 m. The amplitude of the absorption peaks was subjected to a linear fit with the standard concentration values, resulting in a robust linear correlation coefficient (R2 = 0.998). Notably, despite the compact form factor of the methane sensor, it demonstrated commendable stability in gas concentration detection, offering a minimum detection limit of 43.14 ppm·m. Consequently, this highly responsive and compact methane sensor, with its open-path feature, is apt for integration into a variety of applications requiring such attributes. These include handheld telemetry devices, Unmanned Aerial Vehicle (UAV) gas detection systems, vehicle mounted gas detection, and laser gas radar.

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Section: Introductionmentioning

confidence: 99%