Compact and Low-Power-Consumption CO Sensor Using a QCL with Intermittent Scanning Technique
At the beginning of 2023 scientific group from the Shandong Academy of Sciences (China) published an article in Photonics where they report on a new carbon monoxide (CO) sensor using VIGO product.
Scientists describe a compact and low-power-consumption gas sensor using a quantum cascade laser (QCL) for measurement of CO. System based on tunable diode laser absorption spectroscopy (TDLAS). Researchers chose QCL emitting at 4.6 µm because it has the characteristics of single frequency emission and narrow linewidth at the CO absorption line.
The heart of the detection system is VIGO InAsSb uncooled detector AM03120-02 with a response wavelength range of 2–5 µm. The presented measurements show that the sensor can detect CO with high stability and precision. The results showed that the sensor has good stability and linear response in the CO concentration range of 10 ppm to 500 ppm.
The authors used a new intermittent scanning technique to drive the QCL, reducing the sensor’s power consumption.
Demonstrated a compact CO sensor is suitable for applications in coal mine safety, environmental protection, as well as life science.