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

Active Publication Date: 2018-09-28
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide an encryption and decryption communication device and a secure communication system based on the time-domain Talbot effect, so as to solve the problems of complex technical solutions and high costs in the prior art

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  • Encryption and decryption communication device and secure communication system based on time domain Talbot effect
  • Encryption and decryption communication device and secure communication system based on time domain Talbot effect
  • Encryption and decryption communication device and secure communication system based on time domain Talbot effect

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Embodiment Construction

[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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Abstract

The invention discloses an encryption and decryption communication device and a secure communication system based on a time domain Talbot effect, belonging to the technical field of optical communication. The encryption communication device comprises an active mode-locked laser, an intensity modulator and a positive dispersion device; and the decryption communication device comprises a negative dispersion device and an optical detector. According to the scheme of the invention, a dispersive medium with arbitrary dispersion is utilized, so that the optical signal pulse can be changed into a disordered signal without carrying information, an original signal can be obtained by inverse dispersion demodulation at the output end, the effect of secure communication can be achieved, and moreover,the technical scheme is simple and the cost is low.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an encryption and decryption communication device and a secure communication system based on the time-domain Talbot effect. Background technique [0002] With the advent of the era of big data, all unencrypted signals are tantamount to "streaking" on the link. In today's society, people's attention to communication security is gradually increasing. [0003] Secure communication technology refers to the communication method between the source and the destination, in order to prevent the signal from being stolen, change the form of information according to the agreed method to conceal its true content, and has important applications in national defense, commerce, finance, military, science and technology, etc. . So far, many secure communication technologies have been proposed, including quantum security technology, RSA method, and secure communication technology achieved by ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/85
CPCH04B10/85
Inventor 李明林志星孙术乾祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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