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A Method of Extending the Number of Wavelength Selective Switch Ports
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A wavelength selective switch and port quantity technology, applied in the coupling of optical waveguides, instruments, optics, etc., can solve the problem of increasing the size of wavelength selective switches and achieve the effect of meeting the needs of optical communication
Active Publication Date: 2019-04-16
贝耐特光学科技(苏州)有限公司
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Problems solved by technology
[0004] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a method for expanding the number of wavelength selective switch ports, which can greatly expand the number of output ports without significantly increasing the size of the wavelength selective switch, so as to meet the needs of the rapid development of the market
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Embodiment 1
[0044] Embodiment 1: The simplest case is illustrated by taking two deflection stages and two sets of output ports as an example, that is, m=n=2. The deflection device or deflection block of the first deflection stage is A 11 , the deflection device or deflection block of the second deflection stage is A 21 and A 22 , A 21 It is only responsible for switching the optical wavelengthsignal to any first group of output ports, A 22 It is only responsible for switching the optical wavelengthsignal to any second group of output ports.
[0045] In actual use, the light beam input from the input port is mapped to the first-stage deflection device or deflection block A sequentially in the wavelength direction by including beam shaping, demultiplexing and lens transformation. 11 superior.
[0046] map to A 11 Any optical wavelength signal of , if it needs to be switched to the output port of the first group, the deflection device or deflection block A 11 deflects this signal to...
Embodiment 2
[0052] Embodiment 2: Take three deflection stages and four sets of output ports as an example, that is, m=3, n=4.
[0053] At this time, the deflection device in the first deflection stage is A 11 , the deflection device of the third deflection stage is A 31 、A 32 、A 33 and A 34 , A 3i It is only responsible for switching the optical wavelength signal to any i-th group of output ports, i=1, 2, 3, 4.
[0054] At this time, the number of deflection devices in the second deflection stage needs to be determined according to the deflection angle of the deflection devices in actual use, for example, select 2 and record as A 21 and A 22 , where A 21 Corresponding deflection to A 31 and A 32 , A 22 Corresponding deflection to A 33 and A 34 .
[0055] Through the method of the invention, a large number of output ports can be realized, so that a wavelength selective switch with a large number of ports becomes possible, and satisfies the high-speed development of optical com...
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Abstract
The invention discloses a method for extending the number of ports of a wavelength selection switch. The method is characterized in that 1) output ports are grouped; 2) m deflection stages are arranged between input ports and the output ports in turn, and multiple deflection devices or different deflection blocks of the same deflection device are arranged in each deflection stage; 3) the number of the deflection stages and the number of the deflection devices or the deflection blocks of each deflection stage are set according to the relevant conditions; and 4) a deflection path is found according to the position of the target output port of each light wavelengthsignal after completion of setting, and the deflection angle of the deflection devices or the deflection blocks on the deflection path for the light wavelength signals is set in turn so that each light signal is enabled to deflect to the target output port. The achieved beneficial effects are that the limitation of the current number of the ports of the wavelength selection switch is effectively broken through, the wavelength selection switch of large port number is enabled to be possible and thus the requirements of rapid development of optical communication can be met.
Description
technical field [0001] The invention relates to a method for expanding the number of ports of a wavelength selective switch, which belongs to the technical field of optical communication devices. Background technique [0002] People's growing demand for broadband networks has brought huge challenges to current communication networks. Reconfigurable Optical Add-Drop Multiplexers (Reconfigurable Optical Add-Drop Multiplexers, referred to as ROADM) are gradually used to establish optical fiber communication network nodes to achieve different Cross-link scheduling brings flexibility to network operations and greatly reduces operating costs. After years of development, the core components of ROADM equipment have experienced the first generation based on Wavelength Blocker (Wavelength Blocker, referred to as WB) and the second generation of planar lightwave circuit (Planar Lightwave Circuit, referred to as PLC), and has now developed to the third With the generation of wavelength...
Claims
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