Abstract

The polarization characteristics of an internal mirror cw 28-μm water vapor laser at zero magnetic field are studied. A typical 90° polarization flip is observed when one mirror is tilted from parallel alignment. When the mirrors are parallel, an off-axis mode oscillates in two orthogonal linear polarizations whose frequencies are separated by 290 kHz and whose intensities are distributed in two orthogonal patterns in a plane transverse to the laser axis.

© 1981 Optical Society of America

Pulsed and cw operation of helium–water vapor laser at 28 μm

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