Encryption and decryption communication device and secure communication system based on time domain Talbot effect
A technology of encrypted communication and effect, applied in the field of optical communication, can solve problems such as high cost and complicated technical solutions, and achieve the effect of low cost, simple technical solutions and high feasibility
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0033] The spatial Talbot effect can be expressed as a phenomenon that a beam of coherent light reflected or projected from a periodic object will periodically reappear at a certain distance under suitable conditions. The object may be one-dimensional or two-dimensional periodic (such as a spatial grating). These reconstructed images are called Taber images. In addition to these fully reproduced patterns, more interesting patterns have also been observed. Elsewhere in the direction of propagation, for example, the periodic pattern recurs with a period different from that of the original object. These phenomena are called fractional Talbot effects. Based on the duality of time and space, scholars have introduced the spa...
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