Reconfigurable all-optical differentiator based on differential group delay
A differentiator and time-delay technology, applied in instruments, optical fiber transmission, logic circuits using optoelectronic devices, etc., can solve the problems that limit the robustness of communication networks, adjustability or reconfigurability damage, and cannot adapt to future network node changes. requirements and other issues, to achieve the effect of low cost and simple structure
Inactive Publication Date: 2016-10-05
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
But so far, there is no report on the use of the first-order crosstalk effect to realize the tunable differentiator
In most schemes, once the all-optical differentiator is fixed, its adjustability or reconfigurability will be destroyed, and it cannot adapt to the changing needs of future network nodes, which limits the robustness of the communication network.
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[0033] The present invention will be further described below in conjunction with the accompanying drawings.
[0034] Such as figure 1 Shown, the present invention scheme is by light source 101, coupler 102, Mach-Zehnder modulator 103, electrical input signal 104, optical delay unit 105, polarization controller (106 1 ~106 4 ), an optical switch 107, a polarization beam combiner 108, an optical amplifier 109, an adjustable differential group delay device 110 and a polarizer 111. Wherein the polarization controller (106 1 、106 2 ) respectively adjust the polarization states of channel 1 and channel 2 to correspond to the two axes of the polarization beam combiner so that they are orthogonal to each other. Polarization controller 106 3 Adjust the polarization angle α entering the differential group delay device, and 106 4 The axis of the analyzer 111 is adjusted to match the polarization state of channel 2 . In the experiment, α is adjusted to be ± 45° to maximize the cros...
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Abstract
The invention discloses a reconfigurable all-optical differentiator based on differential group delay. The all-optical intensity differentiator with reconfigurable functions comprises an orthogonal polarization signal generator, four polarization controllers, an amplifier, an adjustable differential group delay device and a polarization analyzer. Compared with other differentiators, the polarization controllers 1063 and an optical switch 107 can be adjusted, three functions of positive differentiation, negative differentiation and absolute value differentiation are reconfigured, the differentiator is adjusted according to different functional requirements of next-generation optical networks, and robustness of the future optical networks can be greatly enhanced. Limit of the photoelectric conversion rate in processing nodes of the future networks can be broken through by the aid of all-optical properties, so that high-speed optical network communication is realized.
Description
technical field [0001] The invention relates to the technical field of optical devices, in particular to a reconfigurable all-optical differentiator based on differential group delay. It is suitable for network nodes that realize different differential functions according to different requirements, and can realize frequency multiplication of clock signals at the same time, and can be applied to the field of ultrashort pulse generation. Background technique [0002] In the past ten years, the optical transmission rate in the backbone network has increased rapidly, and the transmission capacity has also been greatly improved through Dense Wavelength Division Multiplexing (DWDM). The application of advanced technology also makes the transmission of ultra-high-speed optical signals easier and easier. However, with the development of ultra-high-speed optical communication networks, the bottleneck of the electrical domain speed of the photoelectric-to-optical conversion devices i...
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IPC IPC(8): G02F3/00H04B10/25
Inventor 陈智宇闫连山姜恒云易安林郭迎辉潘炜罗斌邹喜华张志勇
Owner SOUTHWEST JIAOTONG UNIV