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Novel vortex Dammann grating model and dynamic reconstructible routing system

A Damman grating and vortex technology, which is applied in the field of free space optical communication, can solve the problems of dynamic routing of orbital angular momentum channels, etc., and achieve the effects of easy detection, high energy utilization, and energy averaging

Active Publication Date: 2016-01-27
深圳市深光谷科技有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new vortex Damman grating model and a dynamic reconfigurable routing system, aiming to solve the problem that the existing technology cannot solve the dynamic routing between orbital angular momentum channels

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  • Novel vortex Dammann grating model and dynamic reconstructible routing system
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  • Novel vortex Dammann grating model and dynamic reconstructible routing system

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The traditional Dammann grating was proposed very early, and its characteristic is that it can divide the light beam into N diffraction orders on average, and the energy of these N orders is equal. Taking advantage of this characteristic, a vortex Dammann (DammannOV) grating is proposed, which can be expressed as:

[0025] exp [ i Φ ( x , y ) ] = Σ n = - ...

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Abstract

The invention is suitable for the field of free space optical communication, and provides a novel vortex Dammann grating model and a dynamic reconstructible routing system. The novel vortex Dammann grating model is loaded on a spatial light modulator to divide incident beams into a plurality of diffractive orders, the topological kernel value, corresponding to any one of the diffractive orders, of an orbit angular momentum light beam can be self-defined, so that the spatial light modulator modulates spatial light based on the topological kernel information defined by the loaded novel vortex Dammann grating model. The novel vortex Dammann grating model can realize the parallel detection of a plurality of OAM channels, greatly simplifies the system and increases the number of available OAM channels, and while serving as a demodulator, the energy utilization rate is high and the energy of the channels is equal, and the detection is convenient; and meanwhile, the dynamic routing among orbit angular momentum channels can be realized by the switching of different gratings with the spatial light modulator.

Description

technical field [0001] The invention belongs to the field of free space optical communication, in particular to a novel vortex Damman grating model and a dynamic reconfigurable routing system. Background technique [0002] Whether it is a mobile communication system or an Internet communication system, as well as many other communication systems, the improvement of system performance needs to be achieved by increasing the system capacity (Capacity) and reducing the bit error rate (BitErrorRate, BER). In order to continuously improve the system capacity, people have developed different multiplexing methods on different transmission media (cable, optical fiber, free space, etc.), including Time Division Multiplexing (TDM), Code Division Multiplexing (CodeDivisionMultiplexingCDM), frequency Division Multiplexing (FrequencyDivisionMultiplexingFDM) and Space Division Multiplexing (SpaceDivisionMultiplexingSDM). In order to continuously reduce the bit error rate of the system, pe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04B10/11H04B10/516
Inventor 袁小聪雷霆张萌高社成袁扬胜李朝晖
Owner 深圳市深光谷科技有限公司
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