Zero Phase Shift Mirrors

Principal drawing of a zero phase shift mirror

In conventional mirrors, the polarization type of the incident light beam is changed during reflection. For example, s-polarized light becomes p-polarized light. The zero phase shift mirror ensures that the polarization type of the incident beam is maintained. It is used, for example, in laser material processing to guide the laser beam from the source to the cutting head.

LAYERTEC produces zero phase shift mirrors for the wavelength range of 157 – 4500 nm. These components cancel the phase shift between the s- and p-polarized portions of the reflected beam. As a result, the incident polarization mode is preserved.