METHOD FOR SPECTRAL-SELECTIVE CONVERSION OF MODES OF OPTICAL IRRADIATION IN WAVE-GUIDE AND APPARATUS FOR PERFORMING THE SAME

摘要

FIELD: wave-guide optics. ^ SUBSTANCE: apparatus includes wave-guide having core and envelope whose part is formed of liquid crystal and is arranged between electrodes. Wave -guide mode interferes on periodic changes of refraction index along axis of wave-guide. Said changes are provided due to using chiral liquid crystal with helical symmetry with axis of helix oriented along axis of wave-guide. Spectral range of mode conversion is defined by pitch of chiral liquid crystal helix. Said pitch is changed at applying outer field. ^ EFFECT: enhanced characteristics of frequency-selection conversion. ^ 5 cl, 12 dwg