CN108880675B - Optical communication system - Google Patents
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- CN108880675B CN108880675B CN201810627254.4A CN201810627254A CN108880675B CN 108880675 B CN108880675 B CN 108880675B CN 201810627254 A CN201810627254 A CN 201810627254A CN 108880675 B CN108880675 B CN 108880675B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
Abstract
The invention discloses an optical communication system, which is applied to the technical field of optical communication and comprises: light emitting unit, beam combining unit and light processing unit. The light emitting unit is arranged opposite to the beam combining unit and used for emitting vortex light beams carrying first video and audio information and Gaussian light beams carrying second video and audio information to the beam combining unit. The beam combination unit is arranged opposite to the optical processing unit and used for combining the received vortex light beam and the Gaussian light beam and transmitting the obtained combined light beam to the optical processing unit through a free space optical communication transmission channel. The light processing unit is used for receiving and processing the beam combination beam and obtaining the first video information and the second video information according to the beam combination beam. The optical communication system disclosed by the invention can improve the communication capacity of optical communication.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an optical communication system.
Background
With the rapid development of technologies such as internet, internet of things, cloud computing and the like, people have higher and higher requirements on communication capacity and speed, and an optical communication technology is gradually applied and developed by taking light as a main carrier of signal transmission due to the advantages of high capacity, high speed, low cost and the like. Among them, FSO (Free Space Optical Communication), also called OWC (Optical Wireless Communication), is an Optical Communication technology for transmitting and modulating Optical signals through Free Space, has the advantages of high bandwidth, good confidentiality, no need of frequency band application, convenient erection, etc., and is widely applied to temporary Communication networks in battlefields and places such as across rivers and lakes where Optical fibers or cables are not convenient to lay, but the existing Free Space Optical Communication system has a problem of low Communication capacity.
Disclosure of Invention
The invention provides an optical communication system capable of improving communication capacity of the optical communication system.
An embodiment of the present invention provides an optical communication system, including: the device comprises a light emitting unit, a beam combining unit and a light processing unit; the light emitting unit is arranged opposite to the beam combining unit and is used for emitting vortex light beams carrying first audio-video information and Gaussian light beams carrying second audio-video information to the beam combining unit; the beam combining unit is arranged opposite to the optical processing unit and is used for combining the received vortex light beam and the Gaussian light beam and transmitting the obtained combined light beam to the optical processing unit through a free space optical communication transmission channel; and the light processing unit is used for receiving and processing the beam combination beam and obtaining the first audio-video information and the second audio-video information according to the beam combination beam.
It can be seen from the above embodiments that the vortex light beam carries the first audio/video information and the gaussian light beam carries the second audio/video information, and the vortex light beam is a kind of light beam with equal phase and spiral shape, so that the vortex light beam and the gaussian light beam can be combined into a combined light beam, and coaxial transmission is performed through the free space optical communication channel, and then the first audio/video information and the second audio/video information are transmitted through one free space optical communication channel, thereby improving the communication capacity of optical communication.
Drawings
Fig. 1 is a schematic structural diagram of an optical communication system in a first embodiment provided by the present invention;
fig. 2 is a schematic structural diagram of an optical communication system in a second embodiment provided by the present invention;
fig. 3 is a schematic connection diagram of an audio transmission device in an optical communication system in a second embodiment provided by the present invention;
fig. 4 is a second connection diagram of an optical communication system in a second embodiment provided by the present invention;
fig. 5 is a schematic optical path diagram of an optical communication system in a second embodiment provided by the present invention;
fig. 6 is a schematic light spot diagram of a vortex light beam carrying first audio-visual information in an optical communication system in a second embodiment of the present invention;
fig. 7 is a schematic light spot diagram of a gaussian beam carrying second audio-visual information in an optical communication system in a second embodiment of the present invention;
fig. 8 is a schematic diagram of a light spot of a combined light beam in an optical communication system in a second embodiment provided by the present invention;
fig. 9 is a schematic diagram of a light spot of a converted gaussian beam in an optical communication system according to a second embodiment of the present invention;
fig. 10 is a schematic view of video information in a light emitting unit in a second embodiment provided by the present invention;
fig. 11 is a schematic view of video information in a light receiving unit in a second embodiment provided by the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an optical communication system in a first embodiment provided in the present invention. As shown in fig. 1, the optical communication system includes: a light emitting unit 101, a beam combining unit 102 and a light processing unit 103. And the light emitting unit 101 is arranged opposite to the beam combining unit 102 and is used for emitting the vortex light beam carrying the first audio-video information and the Gaussian light beam carrying the second audio-video information to the beam combining unit 102. And the beam combining unit 102 is arranged opposite to the optical processing unit 103 and is used for combining the received vortex beam and the Gaussian beam and transmitting the obtained combined beam to the optical processing unit 103 through a free space optical communication transmission channel. And the light processing unit 103 is used for receiving and processing the beam combination beam to obtain the first video information and the second video information according to the beam combination beam.
Specifically, the light emitting unit 101 transmits first audio-visual information by using a vortex light beam, transmits second audio-visual information by using a gaussian light beam, the vortex light beam is a light beam which is in a shape of an equal phase and a spiral and has Orbital Angular Momentum (OAM), so that the vortex light beam and the gaussian light beam can be positioned in the same free space optical communication transmission channel after passing through the beam combining unit 102, the vortex light beam and the gaussian light beam positioned in the same free space optical communication transmission channel are combined light beams, the light processing unit 103 receives the combined light beam, performs demodulation analysis and other work, and respectively obtains the first audio-visual information and the second audio-visual information according to the combined light beam. In practical applications, the Beam combining unit 102 may be a BS (Beam Splitter).
In the embodiment of the invention, the vortex light beam carries the first video information and the Gaussian light beam carries the second video information, and the vortex light beam is a light beam which is in the same phase and is in a spiral shape, so that the vortex light beam and the Gaussian light beam can be combined into a combined light beam and are coaxially transmitted through the free space optical communication channel, the first video information and the second video information are transmitted by utilizing the free space optical communication channel, and the communication capacity of optical communication is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an optical communication system in a second embodiment of the present invention, and as shown in fig. 2, different from the optical communication system in the embodiment of the present invention shown in fig. 1, in the embodiment of the present invention:
furthermore, the first video information is audio information, and the second video information is video information. Or the first video and audio information is video information and the second video and audio information is audio information. In practical application, in order to transmit audio information and video information, the vortex light beam can be used for carrying the audio information, the Gaussian light beam can be used for carrying the video information, and the vortex light beam can also be used for carrying the video information, and the Gaussian light beam can be used for carrying the audio information.
Further, the light emitting unit 101 includes: an audio modulation circuit 1011 and an audio light source 1012. The audio modulation circuit 1011 is externally connected to the audio signal source 201, connected to the audio light source 1012, and configured to receive and modulate an audio signal sent by the audio signal source 201, obtain a modulated audio signal, and send the modulated audio signal to the audio light source 1012, where the audio signal carries audio information. An audio light source 1012 receives the modulated audio signal and converts it into a gaussian beam carrying audio information.
Specifically, the audio signal source 201 provides an audio signal and sends the audio signal to the audio modulation circuit 1011, and the audio modulation circuit 1011 modulates the audio signal and sends the modulated audio signal to the audio light source 1012, so as to modulate the audio signal carrying the audio information into a modulated audio signal carrying the audio information, and convert the modulated audio signal carrying the audio information into a gaussian beam carrying the audio information, that is, convert the carrier of the audio information from an electrical signal to an optical signal. In practical applications, the audio signal source 201 may be a music player, the audio light source 1012 may be a laser with a tail fiber, and the laser is connected to the audio modulation circuit 1011, and the intensity of the light signal emitted by the laser may vary with the intensity of the modulation current input by the audio modulation circuit 1011. Preferably, the wavelength of the optical signal emitted by the audio light source 1012 is 635nm (nanometers), and the optical signal is collimated by a fiber collimator and then emitted in parallel.
Further, the light emitting unit 101 further includes: a first USRP (Universal Software radio peripheral) 1013 and a video light source 1014. The first USRP1013 is externally connected to the video signal source 202, is connected to the video light source 1014, and is configured to receive and modulate a video signal sent by the video signal source 202, obtain a modulated video signal, and send the modulated video signal to the video light source 1014, where the video signal carries video information. And a video light source 1014 for receiving the modulated video signal and converting the modulated video signal into a gaussian light beam carrying video information.
Specifically, the video signal source 202 provides a video signal and sends the video signal to the first USRP1013, and the first USRP1013 modulates the video signal and sends the video signal to the video light source 1014, so as to modulate the video signal carrying the video information into a modulated video signal carrying the video information, and convert the modulated video signal carrying the video information into a gaussian light beam carrying the video information, that is, convert the carrier of the video information from an electrical signal to an optical signal. In practical applications, the video signal source 202 may be a video file inside a notebook computer, and the video light source 1014 may be a laser.
In practical applications, if the video signal that the video signal source 202 needs to transmit is a digital signal, the video signal is processed by using the first USRP1013, and the modulation method may be QPSK (Quadrature Phase Shift keying). In practical applications, the center frequency of the USRP-based device can be 50MHz (unit: megahertz) to 2.2GHz (unit: gigahertz), the read-write rate can be 25MS/s (unit: mega-point/second), and the maximum baseband I/Q bandwidth is 20 MHz. The video light source 1014 may be a laser diode, and a temperature controller may be disposed inside the laser diode to control the operating temperature of the laser diode, and a current controller may be disposed to control the operating current of the laser diode, so as to control the intensity of the optical signal output by the laser diode. The laser diode is provided with a biaser on a mounting seat, the laser diode can be modulated from a radio frequency signal of 100KHz (unit: kilohertz) to 500MHz through an SMA (sub Miniature A) connector on the side surface of the mounting seat, the radio frequency input interface impedance of the laser diode can be 50 omega (unit: ohm), the acceptable maximum input power is 200MW (unit: megawatt), the output power is 5MW, the central wavelength is 635nm, the divergence angle of a horizontal light beam is 8 degrees (unit: degree), the divergence angle of a vertical light beam is 32 degrees, the laser diode is collimated by an aspheric lens and then emitted, and the parameters of the laser diode can be selected according to actual requirements.
Further, the light emitting unit 101 further includes a vortex light generating unit 1015. The vortex light generating unit 1015, which is disposed opposite to the video light source 1014 or the audio light source 1012, is configured to receive a gaussian light beam carrying audio information and convert the gaussian light beam into a vortex light beam carrying audio information, or receive a gaussian light beam carrying video information and convert the gaussian light beam into a vortex light beam carrying video information. The other side of the vortex light generating unit 1015 is opposite to the beam combining unit 102, and is further configured to send a vortex light beam carrying audio information or a vortex light beam carrying video information to the beam combining unit 102.
Specifically, if the gaussian beam carrying the second audio-visual information is a gaussian beam carrying audio information, the first audio-visual information is video information, and the second audio-visual information is audio information. And if the Gaussian beam carrying the second audio-video information is the Gaussian beam carrying the video information, the first audio-video information is audio information, and the second audio-video information is video information. The audio light source 1012 converts an audio signal carrying audio information into a gaussian beam carrying audio information, and the audio light source 1012 is opposite to the vortex light generating unit 1015, so that the gaussian beam carrying audio information is converted into a vortex beam carrying audio information by the vortex light generating unit 1015. Or, the video light source 1014 converts a video signal carrying video information into a gaussian beam carrying video information, and the video light source 1014 is opposite to the vortex light generating unit 1015, so that the gaussian beam carrying video information is converted into a vortex light beam carrying video information through the vortex light generating unit 1015. In practical applications, the parameters of the vortex light generating unit 1015 can be selected according to practical requirements. In the optical communication system shown in fig. 2, the vortex light generating unit 1015 is opposite to the audio light source 1012, and is illustrated as an example.
Further, as shown in fig. 5 to 8, the light processing unit 103 includes: a beam splitting unit 1031, a vortex light detection unit 1032, a first diaphragm 1033 and a second diaphragm 1034. And the beam splitting unit 1031 is arranged opposite to the beam combining unit 102, and is used for receiving and splitting the combined beam to obtain two audio and video beams which are respectively sent to the vortex light detection unit 1032 and the second diaphragm 1034, wherein the audio and video beams comprise vortex beams and Gaussian beams. And the vortex light detection unit 1032 is arranged opposite to the beam splitting unit 1031, and is used for receiving a first beam of the two video and audio beams emitted by the beam splitting unit 1031, converting a gaussian beam in the first beam into a converted vortex beam, and converting the vortex beam in the first beam into a converted gaussian beam.
Specifically, the beam combining unit 102 transmits the combined beam to the beam splitting unit 1031 through the free space transmission channel. The beam splitting unit 1031 splits the combined beam to obtain two video and audio beams, and since the combined beam comprises a vortex beam and a gaussian beam, each video and audio beam comprises the vortex beam and the gaussian beam, and each video and audio beam comprises first video and audio information and second video and audio information. Vortex light detection unit 1032 is opposite to beam splitting unit 1031, and then after first beam passes through vortex light detection unit 1032, the vortex light beam carrying first audio-visual information is converted into a converted gaussian light beam, and then the converted gaussian light beam carries first audio-visual information, and meanwhile, when the first beam passes through vortex light detection unit 1032, the gaussian light beam carrying second audio-visual information in the first beam is converted into a converted vortex light beam, and then the converted vortex light beam carries second audio-visual information. In practical applications, the vortex light detection unit 1032 may be a vortex half-wave plate.
The first diaphragm 1033 is disposed opposite to the vortex light detection unit 1032, and is configured to filter the converted vortex light beam and retain the converted gaussian light beam. And a second diaphragm 1034 disposed opposite to the beam splitting unit 1031 and configured to receive the second light beam of the two audio and video light beams emitted by the beam splitting unit 1031, filter a vortex light beam in the second light beam, and retain a gaussian light beam in the second light beam.
Specifically, the apertures of the first diaphragm 1033 and the second diaphragm 1034 are related to the wave plate parameter value of the vortex light detection unit 1032, and further related to the topological charge value of the vortex light beam, the vortex light beam is filtered by using the first diaphragm 1033 and the second diaphragm 1034 which are preset with the apertures, and the gaussian light beam is retained. The first beam of the two beams of audio-video beams passes through the vortex light detection unit 1032 to obtain a conversion gaussian beam carrying first audio-video information and a conversion vortex beam carrying second audio-video information, the conversion vortex beam carrying the second audio-video information is filtered by the first diaphragm 1033, and the conversion gaussian beam carrying the first audio-video information is reserved. The second of the two audio/video beams does not pass through the vortex light detection unit 1032, and then the vortex light beam carrying the first audio/video information is filtered out through the second diaphragm 1034, and the gaussian light beam carrying the second audio/video information is retained.
Further, as shown in fig. 9 and 10, the light processing unit 103 further includes: a solar panel 1035, and an audio receiving unit 1036. And the solar cell panel 1035 is connected to the audio receiving unit 1036, and is configured to receive the gaussian light beam carrying the audio information, perform photoelectric conversion on the gaussian light beam to obtain a modulated audio signal, and send the modulated audio signal to the audio receiving unit 1036. The audio receiving unit 1036 is configured to receive the modulated audio signal and demodulate the modulated audio signal to obtain an audio signal, so as to restore the audio information carried by the audio signal.
Specifically, if the first audio-visual information is audio information and the second audio-visual information is video information, the gaussian beam carrying the audio information is a converted gaussian beam. If the first audio-video information is video information and the second audio-video information is audio information, the Gaussian beam carrying the audio information is a retained Gaussian beam in the second beam. The solar cell panel 1035 is opposite to the first diaphragm 1033 or the second diaphragm 1034, receives the gaussian beam carrying the audio information, converts the gaussian beam carrying the audio information into a modulated audio signal, and sends the modulated audio signal to the audio receiving unit 1036, and the audio receiving unit 1036 demodulates the audio signal to obtain an audio signal, and restores the audio signal to obtain restored audio information and plays the restored audio signal. In practical applications, the audio receiving unit 1036 may be a speaker device, and the solar panel 1035 may be a polycrystalline solar panel with a voltage of 1.5V (unit: volt). As with the optical communication system shown in fig. 2, the solar panel 1035 is opposite the first stop 1033 and is used by way of example only.
Further, the light processing unit 103 further includes: a photodetector 1037, a second USRP1038, and a video receiving unit 1039. And the photodetector 1037 is connected to the second USRP1038, and is configured to receive the gaussian beam carrying the video information and perform photoelectric conversion to obtain a modulated video signal. And a second USRP1038, connected to the video receiving unit 1039, for receiving and demodulating the modulated video signal to obtain a video signal, and sending the video signal to the video receiving unit 1039. The video receiving unit 1039 is configured to receive the video signal to restore video information carried by the video signal.
Specifically, if the first audio-visual information is audio information and the second audio-visual information is video information, the gaussian beam carrying the video information is a gaussian beam reserved in the second beam. And if the first video-audio information is video information and the second video-audio information is audio information, the Gaussian beam carrying the video information is a converted Gaussian beam. The photoelectric converter has a receiving end, and the photoelectric converter receives the gaussian beam carrying the video information through the receiving end opposite to the first diaphragm 1033 or the second diaphragm 1034, and converts the gaussian beam carrying the video information into a video modulation signal. Since the video modulation signal in the gaussian beam was modulated by the first USRP1013, it is now necessary to demodulate the video modulation signal by the second USRP1038 to obtain the video signal, and finally restore the video signal to obtain the video information. In practical applications, the video receiving unit 1039 may be a notebook computer.
Further, as shown in fig. 3, it is a schematic connection diagram of an audio transmission device in an optical communication system in a second embodiment of the present invention. The light emitting unit 101 further comprises audio transmission means 1016. The anode of the audio light source 1012 is connected to the anode of the external power source 203, the cathode of the audio light source 1012 is connected to the left channel line or the right channel line of the audio transmission device 1016, and the ground of the audio transmission device 1016 is connected to the cathode of the external power source 203. The audio transmission device 1016 may be an earphone, and the left channel line, the right channel line, and the ground line of the audio transmission device 1016 may be the left channel line of the earphone, the right channel line of the earphone, and the ground line of the earphone, wherein the ground line of the earphone may be connected to the negative electrode of the external power source 203 through a coaxial cable, and the external power source 203 is a dc power source.
Further, the minimum value of the topological charge order of the vortex light beam carrying the first audio-visual information is 1, the maximum value is 10, and an integer in a range can be selected. It can be understood that, by setting the direction of the vortex light generating unit 1015, the topological charge number of the vortex light beam converted by the vortex light generating unit 1015 can be changed in an integer from-1 to-10.
Alternatively, referring to fig. 4 and fig. 5, fig. 4 is a second connection schematic diagram of the optical communication system in the second embodiment provided in the present invention, and fig. 5 is an optical path schematic diagram of the optical communication system in the second embodiment provided in the present invention. As shown in fig. 4 and 5, the vortex light generating unit 1015 includes a polarizer 204, a quarter wave plate 205, and a vortex half wave plate 206. The Gaussian beam carrying audio information enters the polarizer 204 after passing through the collimator to become linearly polarized light, is converted into circularly polarized light through the quarter-wave plate 205, and enters the vortex half-wave plate 206 to become vortex beam. The vortex half-wave plate 206 may adopt an adjustable wave plate to control the orientation of liquid crystal molecules by using a photo-alignment technique, so as to form an angular spatially gradually changed liquid crystal orientation distribution to generate a vortex light beam when circularly polarized light passes through. The value of the wave plate parameter of the vortex half-wave plate 206 is equal to the value of the wave plate parameter of the vortex light detection unit 1032, so that the vortex light beam converted by the vortex half-wave plate 206 can be converted into a gaussian light beam by the vortex light detection unit 1032.
Optionally, as shown in fig. 4 and 5, the light processing unit 103 further includes an audio filter 207, a first focusing lens 208, and a second focusing lens 209. In order to filter photocurrent noise signals generated by the sun and room lighting halos, an audio filter 207 may be placed after the solar panel 1035 to eliminate noise interference. Since the light spot receiving area of the solar cell panel 1035 is limited, a first focusing lens 208 may be disposed in front of the first diaphragm 1033 to focus the gaussian beam carrying the audio information, so as to enhance the intensity of the gaussian beam carrying the audio information. Accordingly, since the light spot receiving area of the photodetector 1037 is limited, a second focusing lens 209 may be disposed between the second diaphragm 1034 and the photoelectric converter to focus the gaussian beam carrying the video information, so as to enhance the intensity of the gaussian beam carrying the video information.
Optionally, as shown in fig. 4, the optical processing unit 103 further includes an audio amplifying circuit 210, both ends of which are electrically connected to the audio filter 207 and the audio receiving unit 1036, respectively, for amplifying the intensity of the modulated audio signal and sending the enhanced modulated audio signal to the audio receiving unit 1036. Because the filtered electrical signal is attenuated to a certain extent when the audio filter 207 is disposed behind the solar cell panel 1035 to remove unnecessary noise, the audio amplifier circuit 210 needs to be disposed to amplify, the audio amplifier circuit 210 is powered by an integrated circuit board, the power supply voltage can be 12V, and the output power of the amplified electrical signal is correspondingly 10W (unit: watt).
As shown in fig. 6 to 11, after transmitting by using the vortex beam and the gaussian beam, the video information and the audio information are simultaneously played, so that lossless audio information and lossless video information can be obtained, and user experience is further improved.
In the embodiment of the invention, the vortex light beam carries the first video information and the Gaussian light beam carries the second video information, and the vortex light beam has the characteristics of orthogonality, infinite property and the like, so that the vortex light beam and the Gaussian light beam can be combined into a combined light beam and are coaxially transmitted through the free space optical communication channel, the first video information and the second video information are transmitted by utilizing one free space optical communication channel, and the communication capacity of optical communication is improved. In addition, lossless audio information and lossless video information can be obtained by using the optical communication system, and further user experience is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In view of the above description of the optical communication system provided by the present invention, those skilled in the art will recognize that there are variations in the concepts of the embodiments of the present invention, and that the present disclosure is not limited to the embodiments and the application scope of the present invention.
Claims (8)
1. An optical communication system, comprising: the device comprises a light emitting unit, a beam combining unit and a light processing unit;
the light emitting unit is arranged opposite to the beam combining unit and is used for emitting vortex light beams carrying first audio-video information and Gaussian light beams carrying second audio-video information to the beam combining unit;
the beam combining unit is arranged opposite to the optical processing unit and is used for combining the received vortex light beam and the Gaussian light beam and transmitting the obtained combined light beam to the optical processing unit through a free space optical communication transmission channel;
the optical processing unit is used for receiving and processing the beam combination beam and obtaining the first audio-video information and the second audio-video information according to the beam combination beam;
the first audio-video information is audio information, and the second audio-video information is video information; or the first video and audio information is video information, and the second video and audio information is audio information;
the light processing unit includes: the device comprises a beam splitting unit, a vortex light detection unit, a first diaphragm and a second diaphragm;
the beam splitting unit is arranged opposite to the beam combining unit and is used for receiving the combined beam and splitting beams to obtain two audio and video beams which are respectively sent to the vortex light detection unit and the second diaphragm, and the audio and video beams comprise the vortex beams and the Gaussian beams;
the vortex light detection unit is arranged opposite to the beam splitting unit and is used for receiving a first beam of light beam of the two beams of audio-video light beams emitted by the beam splitting unit, converting a Gaussian light beam in the first beam of light beam into a converted vortex light beam, and converting the vortex light beam in the first beam of light beam into a converted Gaussian light beam;
the first diaphragm is arranged opposite to the vortex light detection unit and used for filtering the converted vortex light beams and reserving the converted Gaussian light beams;
the second diaphragm is arranged opposite to the beam splitting unit and used for receiving a second beam of the two beams of audio-video beams emitted by the beam splitting unit, filtering vortex beams in the second beam of the two beams of.
2. The optical communication system of claim 1, wherein the light emitting unit comprises: the audio frequency modulation circuit and the audio frequency light source;
the audio modulation circuit is externally connected with an audio signal source, is connected with the audio light source, and is used for receiving and modulating an audio signal sent by the audio signal source to obtain a modulated audio signal and sending the modulated audio signal to the audio light source, wherein the audio signal carries the audio information;
and the audio light source is used for receiving the modulated audio signal and converting the modulated audio signal into a Gaussian beam carrying audio information.
3. The optical communication system of claim 2, wherein the light emitting unit further comprises: a first general software radio peripheral and a video light source;
the first general software radio peripheral is externally connected with a video signal source, is connected with the video light source, and is used for receiving and modulating a video signal sent by the video signal source to obtain a modulated video signal and sending the modulated video signal to the video light source, wherein the video signal carries the video information;
and the video light source is used for receiving the modulated video signal and converting the modulated video signal into a Gaussian beam carrying video information.
4. The optical communication system according to claim 3, wherein the light emitting unit further comprises an eddy current rotation generating unit;
one side of the vortex light generation unit is arranged opposite to the video light source or the audio light source and is used for receiving the Gaussian beam carrying the audio information and converting the Gaussian beam carrying the audio information into a vortex beam carrying the audio information, or receiving the Gaussian beam carrying the video information and converting the Gaussian beam carrying the video information into a vortex beam carrying the video information;
the other side of the vortex light generation unit is opposite to the beam combination unit, and the vortex light generation unit is further used for sending the vortex light beam carrying the audio information or the vortex light beam carrying the video information to the beam combination unit.
5. The optical communication system of claim 2, wherein the optical processing unit further comprises: the solar cell panel and the audio receiving unit;
the solar cell panel is connected with the audio receiving unit and used for receiving Gaussian beams carrying audio information, performing photoelectric conversion on the Gaussian beams to obtain modulated audio signals and sending the modulated audio signals to the audio receiving unit;
and the audio receiving unit is used for receiving and demodulating the modulated audio signal to obtain the audio signal so as to restore the audio information carried by the audio signal.
6. The optical communication system of claim 1, wherein the optical processing unit further comprises: the photoelectric detector, the second general software radio peripheral and the video receiving unit;
the photoelectric detector is connected with a second general software radio peripheral and used for receiving the Gaussian beam carrying the video information and performing photoelectric conversion to obtain a modulated video signal;
the second general software radio peripheral is connected with the video receiving unit and used for receiving and demodulating the modulated video signal to obtain the video signal and sending the video signal to the video receiving unit;
the video receiving unit is used for receiving the video signal so as to restore the video information carried by the video signal.
7. The optical communication system of claim 2, wherein the light emitting unit further comprises an audio transmission device;
the anode of the audio light source is connected with the anode of an external power supply, the cathode of the audio light source is connected with the left sound channel line or the right sound channel line of the audio transmission device, and the ground wire of the audio transmission device is connected with the cathode of the external power supply.
8. The optical communication system of claim 1, wherein the topological charge order of the vortex beam carrying the first audiovisual information has a minimum value of 1 and a maximum value of 10.
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|---|---|---|---|---|
| CN102857318A (en) * | 2012-08-23 | 2013-01-02 | 河北工业大学 | Vortex beam intensity multiplexing communication system |
| CN105162547A (en) * | 2015-09-08 | 2015-12-16 | 深圳大学 | De-multiplexing unit and de-multiplexing method for OAM (Orbital Angular Momentum) channel |
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| CN106788745B (en) * | 2016-11-25 | 2018-12-25 | 深圳大学 | A kind of method of the device and separation detection of the relevant demultiplexing of orbital angular momentum |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102857318A (en) * | 2012-08-23 | 2013-01-02 | 河北工业大学 | Vortex beam intensity multiplexing communication system |
| CN105162547A (en) * | 2015-09-08 | 2015-12-16 | 深圳大学 | De-multiplexing unit and de-multiplexing method for OAM (Orbital Angular Momentum) channel |
Non-Patent Citations (1)
| Title |
|---|
| 基于高效轨道角动量态分离方法的复用系统方案研究;杨帆 等;《中国电子科学研究院学报》;20140220;第22-26、31页 * |
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