Optical signal modulation method and device, optical signal demodulation method and device
A modulation method and optical signal technology, applied in the field of optical signal processing, can solve problems such as the lack of dimensional accuracy of the loaded signal, and achieve the effects of improving spectrum utilization and improving utilization.
Active Publication Date: 2017-10-27
BEIJING UNIV OF POSTS & TELECOMM
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However, theoretically speaking, the photon angular momentum polarized light beam has infinite eigenstates, while the existing photon angular momentum polarized light beams that only use integer topological charge values have some differences in the loading signal dimension or accuracy. Deficient, cannot fully utilize the advantages of photon angular momentum polarization, so it needs to be improved
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] Embodiments of the present invention provide an optical signal modulation method and device, and an optical signal demodulation method and device, using a beam polarized by a photon angular momentum with a non-integer topological charge value in a wireless optical communication system as a carrier to improve spectrum utilization rate, thereby further improving the utilization of the advantages of photon angular momentum polarization.
[0054] An optical...
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Embodiments of the present invention provide an optical signal modulation method and device, and an optical signal demodulation method and device. Among them, in the solution provided by the embodiment of the present invention, in the process of optical signal modulation, a spatial light modulator is used to synthesize light beams with photon angular momentum polarizations with different topological charge values that are non-integer, and the interference image is simulated by simulation. In the process of signal demodulation, the image controller is used to capture and save the transmission images of beams with non-integer photon angular momentum polarizations with different topological charges, and analyze and demodulate them. It can be seen that the solution provided by the embodiment of the present invention can improve the utilization rate of the spectrum by using the beam polarized by the photon angular momentum of the non-integer topological charge value as the carrier in the wireless optical communication system, thereby further improving the advantages of the photon angular momentum polarization for utilization purposes.
Description
technical field [0001] The present invention relates to the technical field of optical signal processing, in particular to an optical signal modulation method and device, and an optical signal demodulation method and device. Background technique [0002] Optical vortices, like other common macroscopic vortices in nature, have obvious vortex phenomena. As light is a kind of electromagnetic wave, optical vortex, as a special light field, not only has the characteristics of a spiral wavefront, that is, propagating in a spiral manner with the propagation direction as the axis, but also has the characteristics of electromagnetic waves. With the development of the information age, people have higher and higher requirements for information transmission, and laser has become an excellent information carrier due to its good coherence, directivity and extremely high frequency. However, the spectral resources of light are always limited, and the excessively wide spectral band has more...
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IPC IPC(8): H04B10/532H04B10/60
Inventor 刘博忻向军张丽佳张琦王拥军尹霄丽郑乐思田清华田凤
Owner BEIJING UNIV OF POSTS & TELECOMM