Optically controlled optical PAM signal regeneration device
A signal regeneration and signal technology, applied in the field of optical information processing, can solve the problems of unable to PAM signal, regeneration, etc.
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[0020] For the convenience of description, the relevant technical terms appearing in the specific implementation are explained first:
[0021] PAM (Pulse Amplitude Modulation): amplitude modulation;
[0022] NOLM (Nonlinear fiber loop mirror) nonlinear fiber environment;
[0023] MZI (Mach-Zehnder interferometer) Mach-Zehnder interferometer;
[0024] figure 1 It is a structural diagram of an optically controlled optical PAM signal regeneration device invented.
[0025] In this example, if figure 1 As shown, an optically controlled optical PAM signal regeneration device of the present invention includes: a power adaptation unit, an optical clock control unit and a PAM shaping unit;
[0026] Wherein, the power adaptation unit amplifies the input degraded optical PAM signal, so that the level of the degraded optical PAM signal is adjusted to the normal operating point of the PAM shaping unit, and then input to the PAM shaping unit;
[0027] Such as figure 2 As shown, the o...
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[0036] The present invention will be further described in detail below by way of examples.
[0037] Suppose the input degraded optical PAM signal such as image 3 As shown, it satisfies: the symbol rate is 10G baud, the duty cycle is 0.5, the power levels of each level are 0.375W, 0.625W, 0.875W, 1.125W, and the average normalized amplitude noise jitter
[0038] The structure of the PAM shaping unit is figure 1 As shown in the structure, in this embodiment, in order to realize the shaping of the above-mentioned 4-level degraded optical PAM signal, we select the loss coefficient as α=0.21km -1 , the nonlinear coefficient is γ=12W -1 / km high nonlinear optical fiber, on this basis, other optimization parameters adopt fiber length L=3km, phase shifter Δφ=3 / 2π, coefficients of the front and rear couplers are ρ 1 = 5.90% and ρ 2 = 98.95%. Under the optimized parameters of the above PAM shaping unit, the PAM shaping unit can perform shaping functions on four level-degraded op...
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