Phase modulation manner of quantum cryptography receiving device and quantum cryptography transmitting device and optical impulse

摘要

Optical impulse 31x - 34x shows the optical impulse of the approach route. Optical impulse 31y - 34y after period c elapses, shows the case where optical impulse 31x - 34x advances the returning/repeating path. Depending, optical impulse 31y - 34y the respective optical impulse is 31x - 34x. You pay attention to optical impulse 31x. Sink control unit E _B, the phase modulation tonnage 'B1 to the optical impulse 31x due to PMB in time t2c, in the sink buffer stores. And, with the control of sink control unit E _B, optical impulse 31y phase it modulates PMB, on the basis of the phase modulation tonnage 'B1 which is stored in the sink buffer in the time t2 after the period c. This way, PMB it is possible to cancel the effect of phase modulation tonnage 'B1 to the optical impulse 31x in the approach route by phase modulating optical impulse 31y on the basis of phase modulation tonnage 'B1. Optical impulse concerning 32x - 34x, it is similar to optical impulse 31x. Choice figure Drawing 4