| http://www.w3.org/ns/prov#value | - Even in passive materials such as lithium niobate, dichroic elements OVj, such as all polarization-dependent couplers whose coupling can be varied electrooptically, or polarization-dependent interferometers, can be used such that the difference between the attenuation levels of specific waves which are polarized orthogonally with respect to one another, in particular TE and TM, can be adjusted by
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