Trace ethane sensor using an economic midinfrared light-emitting diode

Yan Ji; Bin Tong; Haifei Lu; Xiaoyan Wen; Min Li

doi:10.1117/1.OE.58.3.034107

22 March 2019 Trace ethane sensor using an economic midinfrared light-emitting diode

Yan Ji, Bin Tong, Haifei Lu, Xiaoyan Wen, Min Li

Author Affiliations +

Optical Engineering, Vol. 58, Issue 3, 034107 (March 2019). https://doi.org/10.1117/1.OE.58.3.034107

Abstract

Due to the lack of an economic midinfrared laser, especially wavelength around 3 μm, light sources are critical to trace gas sensing for the gases without absorption in the near-infrared zone. We present a trace ethane photoacoustic (PA) sensor using a midinfrared light-emitting diode (MIR LED). MIR LEDs are very attractive sources for PA technology since they are relatively high power spectral density, easy modulation, low power consumption, and low cost. The proposed PA system with a 3.36-μm MIR LED shows good linearity to ethane concentration and reaches a detection limit of 10 parts per million by volume easily. Ideas of further enhancement of the sensitivity are discussed.

Citation Download Citation

Yan Ji, Bin Tong, Haifei Lu, Xiaoyan Wen, and Min Li "Trace ethane sensor using an economic midinfrared light-emitting diode," Optical Engineering 58(3), 034107 (22 March 2019). https://doi.org/10.1117/1.OE.58.3.034107

Received: 18 August 2018; Accepted: 5 March 2019; Published: 22 March 2019

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