QUANTUM CRYPTOGRAPHY DISTRIBUTION ONE WAY SYSTEM USING THE PHASE STABILIZED OPTICAL FIBER

摘要

A direct transmission-type quantum encryption system based on phase-stabilized optical fibers is provided to coat the optical fibers with liquid crystal polymer materials, thereby configuring a stabilized quantum encryption one-way transmission system without a phase shift. Optical fibers(70), which are portions corresponding to inner optical systems of a transmitter and a receiver, are coated with liquid crystal polymer material, having negative thermal expansivity, in certain thickness, so that a phase shift caused by room temperature can be automatically compensated by positive thermal expansivity of the existing optical fibers and the negative thermal expansivity.