On the basis of the periodic modulation technology

this paper systematically studies the differences in quantum properties of optical signal transmissions between 3-optical fiber coupling systems with linear and equilateral triangular structures respectively.In the tight-binding approximation

it obtains the coupled mode equations for the optical signal transmission in the3-optical fiber coupling system and further simulates the impacts of different system parameters on some major quantum phenomena.The results show that different structures will lead to such property changes as tunneling and coherent tunneling destruction

thus affecting the energy distribution and oscillation frequency of the optical signals..These study results are instructive to the design of novel optical cross-connect connector and other fiber-optic devices.