Phase modulation optical signal physical encryption method and system based on optical phase encryption
A phase modulation and physical encryption technology, applied in the field of optical communication, can solve the problems of difficult commercial use, large volume, complex structure, etc., and achieve the effect of reduced cost and high system reliability
Active Publication Date: 2018-01-02
WUHAN POST & TELECOMM RES INST CO LTD
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However, due to its large size and complex structure, it is difficult to realize commercial use.
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[0035] The present invention provides a phase modulation optical signal physical encryption method based on optical phase encryption, the encryption information can be adjusted according to actual needs, and can be easily compatible with various phase modulation optical signals, including single-carrier QPSK, coherent Optical OFDM, etc., with low cost and high reliability. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Such as figure 1 As shown, the phase modulation optical signal physical encryption system based on optical phase encryption provided by the present invention includes an optical phase modulation module 10, an optical phase encryption module 20, an optical transmission link 30, an optical phase decryption module 40, and an optical phase demodulation module 50 .
[0037] The optical phase modulation module 10 includes a narrow linewidth light source 11 , an optical I / Q modu...
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The invention discloses a phase modulation optical signal physical encryption method and system based on optical phase encryption. The method comprises the following steps: at a transmission end, loading a phase encryption electric signal changing along with time rapidly on a phase modulation optical signal of which transmission information is modulated in order to perform phase encryption; and at a receiving end, performing phase decryption on the encrypted phase modulation optical signal by using a phase decryption electric signal which is the same as phase encryption information in rate, equal to the phase encryption information in amplitude, and reverse to the phase encryption information in polarity, and performing demodulation. According to the method and the system, the phase encryption electric signal changing along with the time rapidly is loaded on the phase modulation optical signal to perform the phase encryption, and the phase decryption is performed the encrypted phase modulation optical signal by the phase decryption electric signal which is the same as the phase encryption information in rate, equal to the phase encryption information in amplitude, and reverse to the phase encryption information in polarity, so that physical encryption of the phase modulation optical signal is realized; the cost is lowered greatly compared with quantum optical communication and chaotic optical communication schemes, and meanwhile the system reliability is relatively high.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to a phase modulation optical signal physical encryption method and system based on optical phase encryption. Background technique [0002] The security measures of the existing optical communication system still adopt stream cipher encryption and decryption technology based on electrical signal processing. Due to the limitation of electronic "bottleneck", the encryption and decryption rate is low, and the maximum rate in the laboratory is only 2.5Gbit / s . When an emergency occurs, the business volume of the existing optical communication network may increase by dozens or even hundreds of times. The traditional encryption and decryption technology based on electrical signal processing is difficult It is fully compatible with the next-generation all-optical communication network, and the rate of encryption and decryption technology based on all-optical signal processin...
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IPC IPC(8): H04B10/556H04B10/85
CPCH04B10/5561H04B10/85
Inventor 罗鸣
Owner WUHAN POST & TELECOMM RES INST CO LTD