A light-controlled light pam signal regeneration device
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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.
Inactive Publication Date: 2019-06-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
At present, most of the all-optical regenerator designs are aimed at traditional OOK signals, and cannot be used for the regeneration of PAM signals.
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[0020] For the convenience of description, the relevant technical terms appearing in the specific implementation are explained first:
[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] like figure 2 As shown, the opti...
example
[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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Abstract
The invention discloses an optically controlled optical PAM signal regeneration device, including a power adaptation unit, an optical clock control unit and a PAM shaping unit; wherein, the PAM shaping unit is the core of the regenerator, which is composed of a Mach-Zehnder interferometer MZI and a high Composed of nonlinear optical fiber ring NOLM, the degraded optical PAM signal that needs to be regenerated first completes the level matching between the input degraded optical PAM signal and the PAM shaping unit through the power adaptation unit, and then adjusts the power of the optical clock signal output by the optical clock control unit And the time delay and the phase shifter in the MZI structure make the PAM shaping unit work normally, by changing the loss coefficient, fiber length, nonlinear coefficient and other parameters of the high nonlinear fiber in the NOLM structure, as well as the coupling coefficient of the front and rear couplers in the MZI structure , PAM shaping units with different levels are designed to complete the regeneration of degraded optical PAM signals; thus the present invention can perform reshaping and retiming functions, and has the advantage that the number of regeneration levels can be flexibly designed.
Description
technical field [0001] The invention belongs to the technical field of optical information processing, and more specifically relates to an optical control optical PAM signal regeneration device. Background technique [0002] In the optical fiber communication system, the optical signal is affected by factors such as fiber dispersion, fiber nonlinear effect, ASE noise accumulation of the optical amplifier, and interaction between channels during transmission, which leads to the degradation of the optical signal and ultimately limits the system and network. transmission rate and distance. Therefore, it is necessary to perform regeneration processing on the degraded signal. Although the traditional photoelectric light regeneration method is quite mature, it is difficult to meet the growing demand for higher-speed data transmission due to the existence of "electronic bottleneck". The all-optical regeneration technology of light-controlled light is considered to be the ultimate...
Claims
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