The function of adjustable liquid crystal attenuator
Liquid crystal modulators provide electrically adjustable attenuation by altering the polarization state, which is then further attenuated by a polarizer. While these devices have limited power handling capabilities, they offer precise control over attenuation levels. Bulk attenuators can operate based on several principles, such as filter wheels with neutral density filters, rotated. The variable gray filter functions for polychromatic or monochromatic light as well as. Thorlabs' Liquid Crystal (LC) Optical Shutters / Variable Attenuators incorporate a liquid crystal cell sandwiched between polarizing elements that are used to quickly change the transmission to either block or attenuate light propagating through the devices. The transmission of the light can be adjusted as required by using the latest liquid crystal technology This makes the LCVA an indispensable. They can be applied to both free-space laser beams and telecom signals transmitted through optical fibers.
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