LC variable phase shifter (VPR) offer an interesting alternative especially when working with polarized light (which is often the case when working with lasers). The Arcoptix VPR is a transmissive element causing minimal losses and can be simply placed within the optical path of our system. The more, the optical retardation (or phase shift) of the LC phase shifter is electrically tuneable with a simple laboratory alternative power supply or function generator. It can also be used as optical valve (for a narrow wavelength range) or as polarization State controller.
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