The piezo electric driven switches are especially designed for high switching times in the millisecond range. Piezo electric actuators enable the optical switch to couple optical fibers with an accuracy of few micro. Therefore no optical components inside are required. The piezo driven optical switches are available for the fiber core diameter of 50 µm up to 600 µm.
The high accuracy of positioning of the piezoelectric actuators guarantees a light transmission of >80%, with a typical switching time of <1 ms. Fiber switches with optical components, like lenses or prisms, will always result in a wavelength-dependent limitation.