CN107769852A - Light emitting devices, optical pickup apparatus, radio optical communication system and method - Google Patents
Light emitting devices, optical pickup apparatus, radio optical communication system and method Download PDFInfo
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- CN107769852A CN107769852A CN201610667448.8A CN201610667448A CN107769852A CN 107769852 A CN107769852 A CN 107769852A CN 201610667448 A CN201610667448 A CN 201610667448A CN 107769852 A CN107769852 A CN 107769852A
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
-
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
-
- 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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
-
- 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
- H04B10/60—Receivers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
A kind of radio optical communication system, it includes light emitting devices and optical pickup apparatus, and the light emitting devices can launch the second optical signal according to the first electrical signals with the optical signal of modulate emission first according to the first negative electricity signal modulation.Optical pickup apparatus can receive first optical signal and it is converted to the second electrical signals of corresponding first electrical signals, second optical signal is converted to the second negative electricity signal of the corresponding first negative electricity signal, the optical pickup apparatus is additionally operable to second electrical signals and the second negative electricity signal carrying out difference processing.The present invention also provides a kind of light emitting devices, optical pickup apparatus and wireless light communication method.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of light emitting devices, optical pickup apparatus, radio optical communication system and
Method.
Background technology
LED illumination technology by itself energy-conservation, long lifespan, it is reliable the advantages that popularized rapidly, and based on white light LEDs
Visible light communication technology is also risen therewith.Visible light communication technology make use of LED high-speed switch response characteristic, by load information
Sent in the form of illumination light by free space, while utilize PD（Photodiode）Light is received Deng electrooptical device
Signal is simultaneously converted into electric signal, and then obtains information.Alternatively, it is also possible to launch light as wireless optical by the use of traditional LASER Light Source
Source.
Wireless light communication have electromagnetism interference, good directionality, strong security, without frequency spectrum license, without fiber plant,
The networking cycle is short, equipment is light, sets up the advantages that convenient.However, limitation wireless light communication speed and communication distance it is very heavy
The factor wanted is exactly ambient noise（Such as sunshine, other artificial light sources）To interference caused by signal of communication.
The content of the invention
In view of this, it is necessary to which a kind of light emitting devices, optical pickup apparatus, wireless light communication for avoiding above mentioned problem is provided
System and method.
A kind of light emitting devices, applied to radio optical communication system, the light emitting devices includes the first modulation module, the
Two modulation modules, the first light emission module and the second light emission module, first modulation module is inputting described first just
Electric signal launches first optical signal to modulate first light emission module, and second modulation module is inputting first
Negative electricity signal launches second optical signal to modulate second light emission module.
Further, first optical signal and second optical signal tool different wave length or first optical signal and institute
State the second optical signal tool phase co-wavelength but polarization direction is different.
Further, first electrical signals and the first negative electricity signal come from same signal source.
Further, first light emission module and second light emission module include light source, and the light source is
Light emitting diode or laser.
A kind of optical pickup apparatus, applied to radio optical communication system, the optical pickup apparatus include the first Optical Receivers,
Second Optical Receivers, the first photoelectric conversion module, the second photoelectric conversion module and differential processing module, first light-receiving
Module can receive the first optical signal of light emitting devices transmitting as described above, and first optical signal received is passed
Give first photoelectric conversion module, first optical signal is converted to corresponding described the by first photoelectric conversion module
Second electrical signals of one electrical signals, second Optical Receivers can receive light emitting devices transmitting as described above
Second optical signal, and send second optical signal received to second photoelectric conversion module, second photoelectricity
Modular converter is converted to second optical signal the second negative electricity signal of the corresponding first negative electricity signal, the difference processing
Module is used to second electrical signals and the second negative electricity signal carrying out difference processing into the 3rd electric signal.
Further, first optical signal and second optical signal tool different wave length, first Optical Receivers
Including filter plate, to receive first optical signal, second Optical Receivers includes and first Optical Receivers
The filter plate of filter plate different wave length, to receive second optical signal；
Or first optical signal has phase co-wavelength from second optical signal but polarization direction is different, first light connects
Receiving module includes the first polarizer, to receive first optical signal；Second Optical Receivers include with it is described first inclined
Shake orthogonal second polarizer in piece polarization direction, to receive second optical signal.
Further, the optical pickup apparatus also includes signal amplification module, and the 3rd electric signal is by the difference
Reason module is sent to the signal amplification module and is amplified processing.
Further, first photoelectric conversion module and/or second photoelectric conversion module are photodiode, snow
One kind in avalanche photo diode, photomultiplier.
A kind of radio optical communication system, it includes light emitting devices as described above and optical pickup apparatus as described above.
Further, first light emission module, second light emission module, first Optical Receivers and institute
Stating the second Optical Receivers, at least one includes beam expanding lens and/or dodging device.
A kind of wireless light communication method, it comprises the following steps：
The first optical signal that outgoing generates according to the modulation of the first electrical signals and second according to the generation of the first negative electricity signal modulation
Optical signal；
Receive first optical signal and second optical signal；
The first optical signal received is converted into the second electrical signals corresponding with first electrical signals, by what is received
Second optical signal is converted to the second negative electricity signal corresponding with the first negative electricity signal；
Second electrical signals and the second negative electricity signal are subjected to difference processing.
Further, first optical signal and second optical signal tool different wave length, or first optical signal
Have phase co-wavelength from second optical signal but polarization direction is different.
Relative to prior art, light emitting devices, optical pickup apparatus, radio optical communication system and side provided by the invention
Method, by the difference of the positive negative signal of the two-way obtained with different wave length or polarization state to improve signal to noise ratio, slacken influence of noise,
And then improve communication distance and speed.
Brief description of the drawings
Fig. 1 is the schematic diagram for the wireless communication system that present pre-ferred embodiments provide.
Main element symbol description
| Radio optical communication system | 100 |
| Signal source | 101 |
| Light emitting devices | 20 |
| First modulation module | 22 |
| Second modulation module | 24 |
| First light emission module | 26 |
| Second light emission module | 28 |
| Light source | 262、282 |
| First optical element | 264 |
| Second optical element | 284 |
| First Optical Receivers | 41 |
| 3rd optical element | 412 |
| 4th optical element | 416 |
| Second Optical Receivers | 42 |
| 5th optical element | 422 |
| 6th optical element | 426 |
| First photoelectric conversion module | 43 |
| Second photoelectric conversion module | 44 |
| Differential processing module | 45 |
| Signal amplification module | 46 |
| Signal processing module | 47 |
Lower embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.In the case where not conflicting, the feature in following embodiment and embodiment can
To be mutually combined.
It should be noted that in the present invention, when a component is considered as with another component " being connected ", it can be with
It is to be joined directly together with another component or be indirectly connected by component placed in the middle and another component.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Refer to shown in Fig. 1, present pre-ferred embodiments provide a kind of radio optical communication system 100, and it includes light transmitting
Device 20 and optical pickup apparatus 40.Light emitting devices 20 to launch the optical signal of carrying information, use by the optical pickup apparatus 40
Handled with receiving the optical signal and being converted into electric signal.
Light emitting devices 20, it includes the first modulation module 22, the second modulation module 24, the first light emission module 26 and
Two light emission modules 28.First modulation module 22 is connected with the second modulation module 24 with a signal source 101.First modulation module 22
Can be that wired connection can also be wireless connection with being connected for the second modulation module 24 and a signal source 101.Signal source 101
Its signal is exported with the first electrical signals and the first negative electricity signal two-way, wherein first electrical signals are delivered to
One modulation module 22, the first negative electricity signal are delivered to the second modulation module 24.In present embodiment, the signal source 101
It can send including signal obtained by all kinds of operation codes such as speech, data, image.First electrical signals and described first negative
Electric signal is that amplitude is equal, signal of opposite in phase.
First light emission module 26 can go out according to the modulate emission of the first electrical signals of first modulation module 22
First optical signal.
Second transmitter module 28 can go out second according to the modulate emission of the first negative electricity signal of second modulation module 24
Optical signal.The wavelength of first optical signal and second optical signal differs.
First light emission module 26 includes light source 262 and the first optics member in the transmission path of the emergent light of light source 262
Part 264.The light source 262 of first light emission module 26 goes out according to the modulate emission of the first electrical signals of first modulation module 22
First optical signal.Light source 262 includes light emitting diode and/or laser.First optical element 264 can be beam expanding lens, to
The optical signal being emitted to light source 262 expands.First optical element 264 can be dodging device, with what is be emitted to light source 262
Optical signal carries out shaping.First optical element 264 can be other optics member outside other beam expanding lens, dodging device etc.
Part, such as lens；The number of first optical element 264 can be it is multiple, can according to need set the first optical element 264 number
Amount and species are simultaneously arranged, so that the first optical signal that the first light emission module 26 outgoing quality is high.Certainly, the first optics member
Part 264 can also omit, to meet that volume of diminution light emitting devices 20 etc. requires.
Second light emission module 28 includes light source 282 and the second optics member in the transmission path of the emergent light of light source 282
Part 284.The light source 282 of second light emission module 28 goes out according to the modulate emission of the first negative electricity signal of second modulation module 24
Second optical signal.Light source 282 includes light emitting diode and/or laser.Second optical element 284 can be beam expanding lens, to
The optical signal being emitted to light source 282 expands.Second optical element 284 can be dodging device, with what is be emitted to light source 282
Optical signal carries out shaping.Second optical element 284 can be other optics member outside other beam expanding lens, dodging device etc.
Part, such as lens；The number of second optical element 284 can be it is multiple, can according to need set the second optical element 284 number
Amount and species are simultaneously arranged, so that the second optical signal that the second light emission module 28 outgoing quality is high.Certainly, the second optics member
Part 284 can also omit, to meet that volume of diminution light emitting devices 20 etc. requires.
Optical pickup apparatus 40, it includes the first Optical Receivers 41, the second Optical Receivers 42, the first photoelectric conversion module
43rd, the second photoelectric conversion module 44, differential processing module 45, signal amplification module 46 and signal processing module 47.Described first
Optical Receivers 41 can receive first optical signal and be transferred to first photoelectric conversion module 43, and described first
Photoelectric conversion module is converted to first optical signal the second electrical signals of corresponding first electrical signals, and described second
Optical Receivers 42 can receive second optical signal and be transferred to second photoelectric conversion module 44, and described second
Photoelectric conversion module 44 is converted to second optical signal the second negative electricity signal of the corresponding first negative electricity signal.Described
Two electrical signals and threeth electric signal transmission of the second negative electricity signal after the difference processing of differential processing module 45 to signal
Amplification module 46, which is amplified, is processed into the 4th electric signal.At 4th electric signal transmission to signal processing module 47
Reason, such as filter, decode.
First Optical Receivers 41 is to receive first optical signal.First Optical Receivers 41 includes the 3rd
The optical element 416 of optical element 412 and the 4th.In present embodiment, the 3rd optical element 412 is optical filter, to filter not
It is same as the light of first wavelength of optical signal；4th optical element 416 can be beam expanding lens, to the first optical signal received
Expanded.4th optical element 416 can be dodging device, to carry out shaping to the first optical signal received.4th light
It can be other optical elements outside beam expanding lens, dodging device etc., such as lens to learn element 416；The number of 4th optical element 416
Mesh can be multiple, according to the quantity and species for needing the 4th optical element 416 of setting and can be arranged, to lift first
The quality of Optical Receivers 41 and the optical signal of the second Optical Receivers 42.Certainly, the 4th optical element 416 can also save
Slightly, to meet volume of diminution optical pickup apparatus 40 etc., other are required.
Second Optical Receivers 42 is receiving second optical signal.Second Optical Receivers 42 includes the
Five optical elements 422 and the 6th optical element 426.In present embodiment, the 5th optical element 422 is a filter plate, the 5th light
Element 422 and the different wave length of the 3rd optical element 412 are learned, to filter the light for being different from second wavelength of optical signal；6th
Optical element 426 can be beam expanding lens, and the first optical signal to receive is expanded.6th optical element 426 can be
Dodging device, to carry out shaping to the first optical signal received.6th optical element 426 can be beam expanding lens, dodging device
Other optical elements Deng outside, such as lens；The number of 6th optical element 426 can be it is multiple, can be according to needing to set
The quantity and species of 6th optical element 426 are simultaneously arranged, and the second light received with lifting the second Optical Receivers 42 is believed
Number quality.Certainly, the 6th optical element 426 can also omit, and to meet volume of diminution optical pickup apparatus 40 etc., other will
Ask.
First photoelectric conversion module 43 and/or second photoelectric conversion module 44 are photodiode, snowslide light
One kind in electric diode, photomultiplier.
It is appreciated that first optical signal is not limited to from second optical signal, wavelength is different, and first light is believed
Number can be the different optical signal of identical wavelength but polarization direction from second optical signal, the 3rd optical element 412 and the 5th
Optical element 422 is the different polarizer in polarization direction, and e.g., the 3rd optical element 412 is inclined with the 5th optical element 422
The direction that shakes is mutually perpendicular to.
It is appreciated that optical pickup apparatus 40 can omit signal amplification module 46 and signal processing module 47, and by difference
The signal processing module that the 3rd electric signal after processing is sent to its exterior is handled.
It is appreciated that radio optical communication system 100 can be applied to air, under water or in the environment of other, i.e. wireless optical
Communication system 100 can use other media such as gas, water as transmission medium.
The present invention also provides a kind of wireless light communication method applied to radio optical communication system, and it comprises the following steps：
The first optical signal that outgoing generates according to the modulation of the first electrical signals and second according to the generation of the first negative electricity signal modulation
The wavelength of optical signal, first optical signal and second optical signal differs, or first optical signal and described the
The wavelength of two optical signals is identical but polarization direction is different；
Receive first optical signal and second optical signal；
The first optical signal received is converted into the second electrical signals corresponding with first electrical signals, by what is received
Second optical signal is converted to the second negative electricity signal corresponding with the first negative electricity signal；
Second electrical signals and the second negative electricity signal are subjected to difference processing.
Light emitting devices 20, optical pickup apparatus 40, radio optical communication system 100 and method provided by the invention, by with
The difference for the positive negative signal of two-way that different wave length or polarization state obtain is improving signal to noise ratio, slacken influence of noise.Wireless optical is led to
The application of letter system 100 is indoors or during outdoor wireless light communication, and the method that the signal received by above-mentioned two makes the difference can be with
The influence of the ambient noises such as part sunshine is effectively eliminated, improves communication distance and speed.Radio optical communication system 100 is applied
During communication in water and in other complex dielectrics, the method that the signal that can also be received by above-mentioned two makes the difference can have
The influence of the elimination part ambient noise of effect, improves communication distance and speed.
It is understood that those skilled in the art can also do other changes etc. in spirit of the invention is used in the present invention's
Design, without departing from the technique effect of the present invention.These changes done according to present invention spirit, it should all be included in
Within scope of the present invention.
Claims (12)
- A kind of 1. light emitting devices, applied to radio optical communication system, it is characterised in that：The light emitting devices includes first and adjusted Molding block, the second modulation module, the first light emission module and the second light emission module, first modulation module is to input State the first electrical signals and launch first optical signal to modulate first light emission module, second modulation module to Input the first negative electricity signal and launch second optical signal to modulate second light emission module.
- 2. light emitting devices as claimed in claim 1, it is characterised in that：First optical signal has with second optical signal Different wave length or first optical signal are different from second optical signal tool phase co-wavelength but polarization direction.
- 3. light emitting devices as claimed in claim 1, it is characterised in that：First electrical signals and the first negative electricity signal come From same signal source.
- 4. light emitting devices as claimed in claim 1, it is characterised in that：First light emission module and second light hair Penetrating module includes light source, and the light source is light emitting diode or laser.
- A kind of 5. optical pickup apparatus, applied to radio optical communication system, it is characterised in that：The optical pickup apparatus includes the first light Receiving module, the second Optical Receivers, the first photoelectric conversion module, the second photoelectric conversion module and differential processing module, it is described First Optical Receivers can receive the first optical signal of light emitting devices transmitting as claimed in claim 1, and will receive First optical signal send first photoelectric conversion module to, first photoelectric conversion module believes first light The second electrical signals of corresponding first electrical signals number are converted to, second Optical Receivers can receive right such as will The second optical signal for asking the light emitting devices described in 1 to launch, and send second optical signal received to described second Second optical signal is converted to the corresponding first negative electricity signal by photoelectric conversion module, second photoelectric conversion module Second negative electricity signal, the differential processing module are used to second electrical signals and the second negative electricity signal carrying out difference It is processed into the 3rd electric signal.
- 6. optical pickup apparatus as claimed in claim 5, it is characterised in that：First optical signal has with second optical signal Different wave length, first Optical Receivers include filter plate, to receive first optical signal, second Optical Receivers Include the filter plate of the filter plate different wave length with first Optical Receivers, to receive second optical signal；Or first optical signal has phase co-wavelength from second optical signal but polarization direction is different, first light connects Receiving module includes the first polarizer, to receive first optical signal；Second Optical Receivers include with it is described first inclined Shake orthogonal second polarizer in piece polarization direction, to receive second optical signal.
- 7. optical pickup apparatus as claimed in claim 5, it is characterised in that：The optical pickup apparatus also includes signal amplification mould Block, the 3rd electric signal are sent to the signal amplification module by the differential processing module and are amplified processing.
- 8. optical pickup apparatus as claimed in claim 5, it is characterised in that：First photoelectric conversion module and/or described Two photoelectric conversion modules are one kind in photodiode, avalanche photodide, photomultiplier.
- 9. a kind of radio optical communication system, it includes the light emitting devices and such as right as described in Claims 1-4 any one It is required that the optical pickup apparatus described in 5 to 8 any one.
- 10. radio optical communication system as claimed in claim 9, it is characterised in that：First light emission module, described second Light emission module, first Optical Receivers and second Optical Receivers at least one include beam expanding lens and/or Dodging device.
- 11. a kind of wireless light communication method, it comprises the following steps：The first optical signal that outgoing generates according to the modulation of the first electrical signals and second according to the generation of the first negative electricity signal modulation Optical signal；Receive first optical signal and second optical signal；The first optical signal received is converted into the second electrical signals corresponding with first electrical signals, by what is received Second optical signal is converted to the second negative electricity signal corresponding with the first negative electricity signal；Second electrical signals and the second negative electricity signal are subjected to difference processing.
- 12. wireless light communication method as claimed in claim 11, it is characterised in that：First optical signal and second light Signal has different wave length, or first optical signal has phase co-wavelength from second optical signal but polarization direction is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610667448.8A CN107769852A (en) | 2016-08-15 | 2016-08-15 | Light emitting devices, optical pickup apparatus, radio optical communication system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610667448.8A CN107769852A (en) | 2016-08-15 | 2016-08-15 | Light emitting devices, optical pickup apparatus, radio optical communication system and method |
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| Publication Number | Publication Date |
|---|---|
| CN107769852A true CN107769852A (en) | 2018-03-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610667448.8A Pending CN107769852A (en) | 2016-08-15 | 2016-08-15 | Light emitting devices, optical pickup apparatus, radio optical communication system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328808A (en) * | 2021-01-14 | 2021-08-31 | 浙江大学 | Underwater wireless optical communication system based on partial response shaping technology and TCM (TCM) technology |
| CN113438031A (en) * | 2021-05-26 | 2021-09-24 | 上海季丰电子股份有限公司 | Dual-frequency optical communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104283609A (en) * | 2014-10-27 | 2015-01-14 | 武汉邮电科学研究院 | Direct detection method and system based on two-channel orthogonal pilot frequency optical signals and device |
| CN104486277A (en) * | 2014-12-23 | 2015-04-01 | 武汉邮电科学研究院 | Polarization shift keying modulation-demodulation method, system and method for updating self-adaptive filtering coefficients of reception end |
| CN104779997A (en) * | 2014-01-09 | 2015-07-15 | 中国科学院西安光学精密机械研究所 | Polarization modulation space laser communication method based on Stokes parameter identification |
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- 2016-08-15 CN CN201610667448.8A patent/CN107769852A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104779997A (en) * | 2014-01-09 | 2015-07-15 | 中国科学院西安光学精密机械研究所 | Polarization modulation space laser communication method based on Stokes parameter identification |
| CN104283609A (en) * | 2014-10-27 | 2015-01-14 | 武汉邮电科学研究院 | Direct detection method and system based on two-channel orthogonal pilot frequency optical signals and device |
| CN104486277A (en) * | 2014-12-23 | 2015-04-01 | 武汉邮电科学研究院 | Polarization shift keying modulation-demodulation method, system and method for updating self-adaptive filtering coefficients of reception end |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328808A (en) * | 2021-01-14 | 2021-08-31 | 浙江大学 | Underwater wireless optical communication system based on partial response shaping technology and TCM (TCM) technology |
| CN113438031A (en) * | 2021-05-26 | 2021-09-24 | 上海季丰电子股份有限公司 | Dual-frequency optical communication system |
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Application publication date: 20180306 |