Chaotic light secret communication system for enhancing secret key space based on photoelectric filtering feedback
A technology of filter feedback and key enhancement, which is applied in the field of chaotic optical security communication system, can solve the problems of eavesdropping and cracking of chaotic security communication, and achieve the effect of enhanced security, small correlation and large adjustable range
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[0035] Example one
[0036] Such as figure 1As shown, the embodiment of the present invention provides a chaotic light privacy communication system based on photoelectric filter feedback enhancing key space, including: ultra-radiation light emitting diode 1, first split element 4, first optical isolator 5a, second The optical isolator 5b, the first adjustable failure unit 6a, the second adjustable failure unit 6b, the transmitter, and the transmitter including the first semiconductor laser 7a, the second lighting element 8a, the first mirror 9a, The fourth substrate element 10a, the first photodetector 11a, the first tapered belt pass filter module 12a, and the first gain can be disposed, the receiver including the second semiconductor laser 7b, the third split element 8b, the second The mirror 9b, the fifth split element 10b, the second photodetector 11b, the second adjustable band pass filter module 12b, and the second gain can be modulated.
[0037] The broadband light signal e...
Example Embodiment
[0047] Example 2
[0048] Such as figure 2 As shown, the second embodiment of the present invention provides a system based on photoelectric filter feedback enhancing chaotic light confidential communication key space, and the specific structure is substantially the same as that of the Example. Unlike the embodiment, in the present embodiment, the optical filter 2, an erbium-doped fiber amplifier 3; the ultra-radiation light-emitting diode 1 is transmitted by the wideband optical signal light filter 2, and the erbium-doped fiber amplifier 3 It is divided into two ways to the first light receiving element 4; the first semiconductor laser 7a is injected, and the first semiconductor laser 7a is injected, and the second optical isolator 5b, the second The second semiconductor laser 7b is injected after the adjustable failure unit 6b.
[0049] Specifically, in this embodiment, the second optical isolator 5a and the third optical isolator 5b parameter setting are the same.
[0050] In a...
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