Fig. 4: Arrival times of different wavelength components.
From: Efficient experimental quantum fingerprinting with channel multiplexing and simultaneous detection
The wavelength components traveling in counterclockwise direction are (a) temporally separated at Bob’s station for ease of individual modulation, while they are (b) combined into the same time slot at Charlie for detection. The components traveling in clockwise direction have the same time distribution since Alice’s and Bob’s station are symmetric. Note, one should ignore the slight amplitude difference between the channels as this plot is taken prior to amplitude fine adjustments.
