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Hydroxyl radicals first detected at 2.8 μm wavelength with optical-feedback cavity-enhanced absorption spectroscopy

A research team led by Prof. Zhang Weijun from the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS) has recently detected hydroxyl radical (OH) at 2.8 μm wavelength with a distributed feedback diode laser, based on optical-feedback cavity-enhanced absorption...