Abstract
We here propose a fiber-optic device with which the phase of a guided light mode may be continuously changed without modifying the light polarization in any way. The fiber should be chiral, the core containing randomly oriented optically active molecules absorbing in the near–UV–vis region of the electromagnetic spectrum. The fiber would lengthwise be subdivided into two equal halves. One half should contain a given chiral molecular species, the other half the corresponding enantiomer. The guided light would run collinearly to an applied magnetic field generated by an electric coil. The polarization-insensitive phase modulation of the light inside the fiber would be due to the induced magnetochiral birefringence. Natural and magnetic optical activity would be compensated to zero.
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