CN109782517A - The method and device of laser display middle width strip chaotic modulation generation low-coherent light - Google Patents
The method and device of laser display middle width strip chaotic modulation generation low-coherent light Download PDFInfo
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- CN109782517A CN109782517A CN201910074817.6A CN201910074817A CN109782517A CN 109782517 A CN109782517 A CN 109782517A CN 201910074817 A CN201910074817 A CN 201910074817A CN 109782517 A CN109782517 A CN 109782517A
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Abstract
The invention discloses the method and devices that a kind of laser display middle width strip chaotic modulation generates low-coherent light, are related to the Laser Modulation application field of chaos circuit.Specifically: broadband chaos light source issues light signal, input high-speed photodetector, after generating broadband chaos electric signal, amplify by broad band amplifier, input bias device, the driving voltage of laser driving circuit also inputs bias device and mixes with the chaotic signal amplified by broadband, it is multiple laser display lasers for electric drive laser works, chaotic modulation signal is also exported simultaneously, each signal parallel modulation laser, and by being greater than 0.3ns or greater than the route of 6cm delay, make each laser output chaotic laser light, make output signal when reaching screen end without coherence simultaneously, up to low-coherent light output, light is assembled by convergent lens, then after collimation lens collimates, parallel injection MEMS mirror piece, it is adjusted by corresponding scanning circuit to realize that laser display system is imaged in curtain.
Description
Technical field
The present invention relates to the Laser Modulation application field of chaos circuit, specially a kind of laser display middle width strip chaotic modulation
Generate the method and device of low-coherent light.
Background technique
Laser display technology is excellent by its color gamut space is big, color saturation is high, electro-optical efficiency is high, light source life is long etc.
Gesture becomes after CRT, plasma, LCD/LED display technology, most potential display technology of new generation.However, due to swashing
Light when, spatial coherence it is high so that there are compound speckle when laser projection imaging, cause the resolution ratio of projected image and right
Than degree degradation.The problem is always to hinder the critical issue of laser display technology development.
In order to solve this problem, most researcher adds the different devices for reducing laser coherence in the optical path, from space
Domain reduces the coherence of laser, and main adding set includes: mobile or rotation phase random scattering screen, has specific coding
The phase diffuser screen of structure, micro scanning lens, diffractive optical element, changeable type reflecting mirror, the homogeneous light passing pipe of rotation, colloidal state scatterer,
High-frequency vibration optical fiber, multimode fibre etc., these devices can adjust the phase distribution of primitive light wave in laser beam, to change
The spatial distribution of speckle forms the uniform image of Energy distribution, realizes the elimination of laser display speckle.
In addition there are also some researchs is made that improvement for display screen and light source, reduces the relevant of laser from time-domain
Property.The screen of vibration or the screen for adding colloidal dispersion substance can make to interfere speckle dry for a long time in fixed position formation
Relate to, multi wave length illuminating source, accidental laser, white light laser etc. can also it is a degree of reduce laser coherence, to inhibit
The formation of speckle.
For researcher during studying the non-linear dynamic characteristic of light feedback semiconductor laser, discovery chaos state can
With it is a degree of influence laser temporal coherence (IEEE J. Quantum Electron., 28 (6), 1459-1469,
1992；Appl. Opt., 48 (5), 969-973,2009).It is (several that these are all based on infrared band, single transverse mode, low-power
Milliwatt) research carried out in long chamber feedback states of semiconductor laser, be not appropriate for the Integrated design of product, integrated morphology it is short
Chamber performance is not identical, and in laser display laser used be all high-power (hundred milliwatts), more transverse modes, visible light wave range half
Conductor laser.
(Proc. SPIE 8550, Optical Systems Design 2012,85501I, 2012) though in article
The coherence for improving laser using modulated signal is had been pointed out, but single-frequency modulated signal is used to disinthibite light feedback to laser
The chaos characteristic that device generates, and modulated with significantly simple signal, result necessarily causes laser output brightness light and dark
Evolution, be unfavorable for the effect of laser display.
Therefore researcher proposes to generate the laser in laser display system using the methods of light feedback or light injection
Chaotic laser light, to reduce its coherence, but this method needs to separate part light and provides the generation of chaotic laser light, reduces laser
The delivery efficiency of display system also has the chip of laser technology of directly processing low-coherence light source, but the technical matters is complicated, no
It easily grasps, can not also be mass produced at present, and output power is lower, it, must in order to reach the brightness requirement of laser display system
The laser much larger than the number of lasers in existing laser display system must be used.Although modulating laser using chaos electric signal
Device generates chaotic laser light and has proposition, but generates in chaotic laser light and generate field for ranging, random number, to laser display
Speckle inhibits field to be not directed to.In order to more effectively its output using laser, be made to reach maximum, dissipation spot effect is more preferable, because
This needs to propose to improve to the prior art, proposes a kind of method of novel modulation laser to realize dissipating for laser display system
Class inhibits.
Summary of the invention
For the present invention in order to solve the presence due to speckle in the prior art, laser utilization rate is not high, and output is not achieved most
Big problem provides a kind of method and device of laser display middle width strip chaotic modulation generation low-coherent light.
The present invention is achieved by the following technical solution: a kind of laser display middle width strip chaotic modulation generation Low coherence
The method of light, broadband chaos light source issue light signal, input high-speed photodetector, after generating broadband chaos electric signal, warp
Broad band amplifier amplification is crossed, bias device is inputted, the driving voltage of laser driving circuit also inputs bias device and puts with by broadband
Big chaotic signal mixing is multiple laser display lasers for electric drive laser works, while also exporting chaotic modulation
Signal, each signal parallel modulation laser, and by being greater than 0.3ns or greater than the route of 6cm delay, keep each laser output mixed
Ignorant laser, while export output signal without coherence to get low-coherent light when reaching screen end, light passes through convergent lens meeting
It is poly-, it is parallel to inject MEMS mirror piece then after collimation lens collimates, it is adjusted by corresponding scanning circuit to realize that laser is aobvious
Show that system is imaged in curtain.
A kind of laser display middle width strip chaotic modulation generates the device of low-coherent light, including broadband chaos light source and laser
Driving circuit, the output end of the broadband chaos light source and the input terminal of high-speed photodetector connect, the high-speed light electrical resistivity survey
The input terminal of the output end and broad band amplifier of surveying device connects, the output end of the broad band amplifier and an input of bias device
End connection, the output end of the laser driving circuit and another input terminal of bias device connect, the output of the bias device
End is by being greater than 0.3ns or connecting with the input terminal of multiple lasers greater than the route of 6cm delay and to drive laser, along sharp
The light path arrangement of light device has plus lens, collimation lens and MEMS mirror, and optical path enters after MEMS mirror, by scanning electricity accordingly
Road is adjusted, and laser display system is imaged in curtain.
The present invention is the master in order to generate the invented design of low-coherent light using broadband chaotic modulation in laser display
If laser is modulated by chaos electric signal to inhibit to the speckle of laser display, so that low-coherent light is generated, it is wide
The source of broadband chaos electric signal, broadband chaos light source output light to high speed are constituted with chaos light source and high-speed photodetector
Photodetector transforms into broadband chaos electric signal, the output end of high-speed photodetector and the input terminal of broad band amplifier
Connection amplifies broadband chaos electric signal by broad band amplifier, the output end of broad band amplifier and an input of bias device
End connection, another input terminal of bias device and the output end of laser driving circuit connect, the telecommunications of laser driving circuit
Number with after the electric chaotic signal that broadband is amplified mixes, the output end of bias device passes through greater than 0.3ns or greater than 6cm delay
Route connect that laser is driven to issue light beam with the input terminal of multiple lasers, has plus lens, collimation along light path arrangement
Lens and MEMS mirror, light is assembled by convergent lens, parallel to inject MEMS mirror piece then after collimation lens collimates, finally
It is adjusted again by corresponding scanning circuit to realize imaging of the laser display system on curtain.The principle of the present invention is using mixed
The ignorant each laser of signal modulation, modulated each laser exports chaotic laser light, and chaotic laser light itself coherence is very
It is low, so single laser output uses delay line, so that between each laser without speckle between bias device and laser
Also without coherence, ensure that the light beam after assembling without coherence, it may be assumed that single laser output coherence is low, it is multiple between also without
Coherence, the characteristic reduced using chaotic laser light temporal coherence realize that the speckle of laser display system inhibits, and using wide
Combination with chaos light source and high-speed photodetector, allow the bandwidth of chaos light source electric signal easily reach 5GHz with
On, this is that circuit is extremely difficult to, and the effect of modulation is more preferable.
Compared with prior art the invention has the following advantages: a kind of laser display middle width strip provided by the present invention
Chaotic modulation generates the method and device of low-coherent light, modulation amplitude very little, and frequency is very high, will not influence display effect,
Using chaotic laser light itself, coherence is very low, so single laser output is without speckle, delay line makes between each laser
Without coherence, the light beam after ensure that convergence is without coherence；This method be not necessarily to laser output in order to formed light feedback and
Part light is separated, the total power output of laser is ensure that, improves capacity usage ratio；The present invention is mixed without consideration light feedback
The condition that ignorant laser generates, using the combination of broadband chaos light source and high-speed photodetector, so that chaos light source electric signal
Bandwidth can easily reach 5GHz or more, and frequency spectrum can be very flat, and effect is more preferable, while device used in this method and device
Part is also less, and system is simple and reliable, easily grasp, can large-scale application, improve laser utilization, tool is had large improvement.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention, wherein solid line with the arrow is optical path, the solid line of no arrow is circuit.
In figure: the broadband 1- chaos light source, 2- high-speed photodetector, 3- broad band amplifier, 4- bias device, 5- laser drive
Dynamic circuit, 6- laser, 7- plus lens, 8 collimation lenses, 9- curtain, 10-MEMS mirror.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
A kind of laser display middle width strip chaotic modulation generates the device of low-coherent light, as shown in Figure 1, including broadband chaos light
The output end of source 1 and laser driving circuit 5, the broadband chaos light source 1 is connect with the input terminal of high-speed photodetector 2,
The output end of the high-speed photodetector 2 is connect with the input terminal of broad band amplifier 3, the output end of the broad band amplifier 3
It is connect with an input terminal of bias device 4, the output end of the laser driving circuit 5 and another input terminal of bias device 4
Connection, the output end of the bias device 4 pass through greater than 0.3ns or greater than the route of 6cm delay and the input terminal of multiple lasers 6
Connection has plus lens 7, collimation lens 8 and a MEMS mirror 10 to drive laser 6, along the light path arrangement of laser 6, optical path into
It after entering MEMS mirror 10, is adjusted by corresponding scanning circuit, laser display system is imaged in curtain 9.
In the present embodiment: the broadband chaos light source 1 issues light signal, produced by inputting after high-speed photodetector 2
Chaotic signal bandwidth >=5GHz；The signal response range of the broad band amplifier 3 are as follows: lowest frequency response is not higher than 100KHz,
High frequency response is not less than 5GHz；The response range of the bias device 4 are as follows: lowest frequency response is not higher than 100KHz, and high frequency response is not
Lower than 5GHz.
The method that one of the present embodiment laser display middle width strip chaotic modulation generates low-coherent light, as shown in Figure 1, wide
Band chaos light source 1 issues light signal, inputs high-speed photodetector 2, after generating broadband chaos electric signal, amplifies by broadband
Device 3 amplifies, and inputs bias device 4, and the driving voltage of laser driving circuit 5 also inputs bias device 4 and mixing by broadband amplification
Ignorant signal mixing is that multiple laser display lasers 6 work for electric drive laser 6, while also exporting chaotic modulation signal,
Each signal parallel modulation laser 6, and by being greater than 0.3ns or greater than the route of 6cm delay, so that each laser 5 is exported chaos
Laser, while export output signal without coherence to get low-coherent light when reaching screen end, light passes through 7 meeting of convergent lens
It is poly-, it is parallel to inject MEMS mirror piece 10 then after the collimation of collimation lens 8, it is adjusted by corresponding scanning circuit sharp to realize
Light display system is imaged in curtain 9.
The scope of protection of present invention is not limited to the above specific embodiment, and for those skilled in the art and
Speech, the present invention can there are many deformation and change, it is all within design and principle of the invention it is made it is any modification, improve and
Equivalent replacement should be all included within protection scope of the present invention.
Claims (8)
1. a kind of method that laser display middle width strip chaotic modulation generates low-coherent light, it is characterised in that: broadband chaos light source (1)
Light signal is issued, is inputted high-speed photodetector (2), after generating broadband chaos electric signal, is put by broad band amplifier (3)
Greatly, bias device (4) are inputted, the driving voltage of laser driving circuit (5) also inputs bias device (4) and mixing by broadband amplification
Ignorant signal mixing is that multiple laser display lasers (6) work for electric drive laser (6), while also exporting chaotic modulation
Signal, each signal parallel modulation laser (6), and by being greater than 0.3ns or greater than the route of 6cm delay, make each laser (5)
Chaotic laser light is exported, while exports output signal without coherence to get low-coherent light when reaching screen end, light is through overconvergence
Lens (7) are assembled, parallel to inject MEMS mirror piece (10) then after collimation lens (8) collimation, pass through corresponding scanning circuit
It adjusts to realize that laser display system is imaged in curtain (9).
2. the method that a kind of laser display middle width strip chaotic modulation according to claim 1 generates low-coherent light, feature
Be: the broadband chaos light source (1) issues light signal, chaotic signal caused by input high-speed photodetector (2) afterwards
Bandwidth >=5GHz.
3. the method that a kind of laser display middle width strip chaotic modulation according to claim 1 generates low-coherent light, feature
It is: the signal response range of the broad band amplifier (3) are as follows: lowest frequency response is not higher than 100KHz, and high frequency response is not less than
5GHz。
4. the method that a kind of laser display middle width strip chaotic modulation according to claim 1 generates low-coherent light, feature
It is: the response range of the bias device (4) are as follows: lowest frequency response is not higher than 100KHz, and high frequency response is not less than 5GHz.
5. the device that a kind of laser display middle width strip chaotic modulation generates low-coherent light, it is characterised in that: including broadband chaos light
Source (1) and laser driving circuit (5), the output end of the broadband chaos light source (1) and the input of high-speed photodetector (2)
End connection, the output end of the high-speed photodetector (2) are connect with the input terminal of broad band amplifier (3), the broadband amplification
The output end of device (3) is connect with an input terminal of bias device (4), the output end of the laser driving circuit (5) and biasing
Another input terminal of device (4) connects, and the output end of the bias device (4) passes through greater than 0.3ns or greater than the route of 6cm delay
It is connect with the input terminal of multiple lasers (6) to drive laser (6), the light path arrangement along laser (6) has plus lens
(7), collimation lens (8) and MEMS mirror (10), optical path enter after MEMS mirror (10), are adjusted, made by corresponding scanning circuit
Laser display system is imaged in curtain (9).
6. a kind of laser display middle width strip chaotic modulation according to claim 5 generates the device of low-coherent light, feature
Be: the broadband chaos light source (1) issues light signal, chaotic signal caused by input high-speed photodetector (2) afterwards
Bandwidth >=5GHz.
7. a kind of laser display middle width strip chaotic modulation according to claim 5 generates the device of low-coherent light, feature
It is: the signal response range of the broad band amplifier (3) are as follows: lowest frequency response is not higher than 100KHz, and high frequency response is not less than
5GHz。
8. a kind of laser display middle width strip chaotic modulation according to claim 5 generates the device of low-coherent light, feature
It is: the response range of the bias device (4) are as follows: lowest frequency response is not higher than 100KHz, and high frequency response is not less than 5GHz.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933852A (en) * | 2021-10-13 | 2022-01-14 | 西南大学 | Photoelectric dual-mode anti-interference distance measuring device and method based on broadband chaotic correlation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7972008B2 (en) * | 2008-10-21 | 2011-07-05 | Microvision, Inc. | Projection system using high-frequency drive modulation to reduce perceived speckle |
| CN102207633A (en) * | 2010-03-31 | 2011-10-05 | 日立民用电子株式会社 | Laser projector |
| CN105005052A (en) * | 2015-06-05 | 2015-10-28 | 太原理工大学 | Radio-over-fiber ultra-wideband remote microwave photon chaotic MIMO imaging radar |
| CN105182674A (en) * | 2015-10-28 | 2015-12-23 | 中视迪威激光显示技术有限公司 | Laser light source special for laser projector |
| CN205543685U (en) * | 2016-04-20 | 2016-08-31 | 太原理工大学 | Chaos semiconductor laser of module integration of anti - mirror is passed through in area |
| CN207967592U (en) * | 2018-03-01 | 2018-10-12 | 深圳市杰普特光电股份有限公司 | Laser prebias device and laser system |
| CN108761828A (en) * | 2018-06-25 | 2018-11-06 | 太原理工大学 | A kind of special dissipation spot light source of laser display |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176020A (en) * | 2010-12-30 | 2011-09-07 | 太原理工大学 | Chaos Laser ranging device based on liquid crystal |
| CN102322806B (en) * | 2011-08-01 | 2013-08-07 | 杭州欧忆光电科技有限公司 | Brillouin optical time domain analyzer relevant to chaotic laser |
| CN205049852U (en) * | 2015-10-28 | 2016-02-24 | 中视迪威激光显示技术有限公司 | Special laser lamp -house of laser projector |
| CN206741132U (en) * | 2017-05-03 | 2017-12-12 | 南京大学 | A kind of bias controller based on chaotic signal |
| CN107682091B (en) * | 2017-09-14 | 2020-07-24 | 电子科技大学 | Time delay hiding and spread spectrum system and method for generating signal by using same |
| CN108803221B (en) * | 2018-06-25 | 2020-11-17 | 太原理工大学 | Laser light source of laser projector |
-
2019
- 2019-01-25 CN CN201910074817.6A patent/CN109782517B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7972008B2 (en) * | 2008-10-21 | 2011-07-05 | Microvision, Inc. | Projection system using high-frequency drive modulation to reduce perceived speckle |
| CN102207633A (en) * | 2010-03-31 | 2011-10-05 | 日立民用电子株式会社 | Laser projector |
| CN105005052A (en) * | 2015-06-05 | 2015-10-28 | 太原理工大学 | Radio-over-fiber ultra-wideband remote microwave photon chaotic MIMO imaging radar |
| CN105182674A (en) * | 2015-10-28 | 2015-12-23 | 中视迪威激光显示技术有限公司 | Laser light source special for laser projector |
| CN205543685U (en) * | 2016-04-20 | 2016-08-31 | 太原理工大学 | Chaos semiconductor laser of module integration of anti - mirror is passed through in area |
| CN207967592U (en) * | 2018-03-01 | 2018-10-12 | 深圳市杰普特光电股份有限公司 | Laser prebias device and laser system |
| CN108761828A (en) * | 2018-06-25 | 2018-11-06 | 太原理工大学 | A kind of special dissipation spot light source of laser display |
Non-Patent Citations (2)
| Title |
|---|
| HANG XU: "Fault location for WDM‐PON using a multiple‐longitudinal‐mode laser modulated by chaotic wave", 《MICROWAVE AND OPTICAL TECHNOLOGY LETTERS》 * |
| 袁超: "高精度时域反射仪的研制", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933852A (en) * | 2021-10-13 | 2022-01-14 | 西南大学 | Photoelectric dual-mode anti-interference distance measuring device and method based on broadband chaotic correlation method |
| CN113933852B (en) * | 2021-10-13 | 2022-07-19 | 西南大学 | Photoelectric dual-mode anti-interference distance measuring device and method based on broadband chaotic correlation method |
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