Abstract: Gas detection is critically important in both industrial production and environmental monitoring. Due to the absorption characteristics of gases in the infrared wavelength domain, thermal ...

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PORTLAND, Ore. — Hundreds of protesters marched about two miles from City Hall to the ICE facility in South Waterfront on Saturday, responding to the actions of federal agents, according to witnesses.

Abstract: A laser gas sensor with phase compensation in free space is designed based on a half-mirror and mixer in this study. The half-mirror is employed to split the returned beam into transmitted ...