4.4-μm cascade 13C 16O2 laser

Abstract
An in‐cavity hot 13C 16O2 cell is used to obtain a 4.4‐μm lasing from a cascade process in a sealed off 13C 16O2 laser. The 4.4‐μm laser is tunable and operates on the P branch (near 4.44 μm) and the R branch (near 4.39 μm) of the ([10°1]I–[10°0]I) band of 13C 16O2. The laser is mechanically Q switched producing peak powers in excess of 10 W with repetition rates greater than 500 Hz.

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