CN100576133C - Space integral electron hole pair correlator - Google Patents
Space integral electron hole pair correlator Download PDFInfo
- Publication number
- CN100576133C CN100576133C CN200710049343A CN200710049343A CN100576133C CN 100576133 C CN100576133 C CN 100576133C CN 200710049343 A CN200710049343 A CN 200710049343A CN 200710049343 A CN200710049343 A CN 200710049343A CN 100576133 C CN100576133 C CN 100576133C
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- CN
- China
- Prior art keywords
- light sources
- exciting light
- galvanometer
- silicon chip
- scanner driver
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Abstract
The invention discloses a kind of space integral electron hole pair correlator, it is characterized in that, comprise and detect radiant 4, beam shaping 5, silicon chip 6, silicon chip 7, convex lens 8 and photoelectronic detecting array 9, they are arranged on the same optical axis in turn; Comprise scanner driver 1, galvanometer 2 and exciting light sources 3, wherein scanner driver 3 is connected with galvanometer 2, exciting light sources 1 through the reflected light of galvanometer 2 be incident on the silicon chip 7 flat beam at grade; Comprise scanner driver 10, galvanometer 11 and exciting light sources 12, wherein scanner driver 10 is connected with galvanometer 11, exciting light sources 12 through the reflected light of galvanometers 11 with detect radiant 4 through be incident on behind the beam shaping 5 on the silicon chip 6 flat beam at grade; RF signal S
2(t) be added in exciting light sources 1, be used for modulating exciting light sources 1, rf signal S
1(t) be added on the exciting light sources 12, be used for modulating exciting light sources 12.
Description
Technical field
The present invention relates to the optical information technical field, be specifically related to a kind of space integral electron hole pair correlator.
Background technology
Correlator is mainly used in associated picture identification, detects aspects such as feeble signal.It is higher to the bandwidth requirement of system particularly will to detect the feeble signal that is submerged in the strong noise background in complicated day by day electromagnetic wave environment.
At present, correlator mainly contains digital correlator, acousto-optic correlator, optic-electronic hybrid joint transform correlator, optical correlators.The method of digital correlator available hardware or software realizes, by decision circuit two string digital code streams is compared and realizes being correlated with, and is mainly used in communication aspects, but can't carries out the parallel processing of data; Acousto-optic correlator utilizes the principle of acoustic optic interaction, introduces light signal by the transmission of sound wave and postpones, and finish multiplying with an optical system, has the ability that high-speed parallel is handled, and shortcoming is that volume is comparatively huge, and bandwidth is big inadequately; The optic-electronic hybrid joint transform correlator is computer-controlled photoelectricity commingled system, and system carries out Fourier transform and optical correlation with the light velocity, and power spectrum and related output signal are then surveyed by CCD, can carry out digital signal processing; Optical correlators mainly use lens transformation to finish the optics phase multiplication of frequency plane, and dirigibility is relatively poor, can't handle in real time.
Summary of the invention
Technical matters to be solved by this invention is how a kind of space integral electron hole pair correlator is provided, this correlator can overcome the shortcoming of prior art, and low to environmental requirement in use, the processing signals spectral range is wide, can apply to high frequency and treat with leniency in the signal Processing.
Technical matters proposed by the invention is to solve like this: a kind of space integral electron hole pair correlator is provided, it is characterized in that, comprise and detect radiant 4, beam shaping 5, silicon chip 6, silicon chip 7, convex lens 8 and photoelectronic detecting array 9, they are arranged on the same optical axis in turn; Comprise scanner driver 1, galvanometer 2 and exciting light sources 3, wherein scanner driver 3 is connected with galvanometer 2, exciting light sources 1 through the reflected light of galvanometer 2 be incident on the silicon chip 7 inclined to one side planar beam at grade, wherein photoelectronic detecting array 9 is placed on the focal plane of convex lens 8; Comprise scanner driver 10, galvanometer 11 and exciting light sources 12, wherein scanner driver 10 drives galvanometers 11 rotations, exciting light sources 12 through the reflected light of galvanometers 11 with detect radiant 4 through be incident on behind the beam shaping 5 on the silicon chip 6 flat beam at grade; RF signal S
2(t) be added in exciting light sources 1, be used for modulating exciting light sources 1, rf signal S
1(t) be added on the exciting light sources 12, be used for modulating exciting light sources 12.
According to space integral electron hole pair correlator provided by the present invention, it is characterized in that, detecting radiant (4) is infrared semiconductor laser, exciting light sources (1) and exciting light sources (12) are the laser instrument of 830nm for optical wavelength, beam shaping (5) is made up of convex lens and lens pillar, silicon chip (6) is selected the heavy doping silicon chip for use, and photoelectronic detecting array is a semiconductor uncooled ir photoelectronic detecting array.
The ultimate principle of the present invention's utilization: it is right that exciting light (photon energy is greater than the energy gap of semiconductor material) incides semiconductor material surface excitation electron hole, because this light beam goes into to have caused the material change of refractive, and be the signal of semiconductor material variations in refractive index by the conversion of signals that the rotation of galvanometer will be modulated exciting light sources, and this variations in refractive index signal is loaded with the amplitude phase information of modulated light source signal.When detecting light and pass the semiconductor that this refractive index generating period sexually revises, diffraction will take place.Detect diffraction light after lens focus with photodetector at last.
Beneficial effect of the present invention: 1, instantaneous band is wide, and this machine instant bandwidth can reach 1GHz; 2, can handle parallel signal in real time; 3, multi-form signal all there is processing power preferably, is easy to Gauss's weighting; 4, anti-electromagnetic interference capability is strong, the signal resolution height.
Description of drawings
Fig. 1 is a space integral electron hole pair correlator synoptic diagram.
Wherein, 1, exciting light sources, 2, galvanometer, 3, scanner driver, 4, detect radiant, 5, beam shaping, 6, silicon chip, 7, silicon chip, 8, convex lens, 9, photoelectronic detecting array, 10, scanner driver, 11, galvanometer, 12, exciting light sources.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, this correlator comprises from left to right: detect radiant 4, beam shaping 5, silicon chip 6,7, convex lens 8, photoelectronic detecting array 9, scanner driver 3,10, galvanometer 2,11, exciting light sources 1,12.Wherein detect radiant 4, beam shaping 5, silicon chip 6, silicon chip 7, convex lens 8 and photoelectronic detecting array 9 on same optical axis, exciting light sources 12 through the reflected light of galvanometer 11 be incident to flat beam on the silicon chip 6 in same plane, in like manner, scanner driver 3 through the reflected light of galvanometer 2 be incident to flat beam on the silicon chip 7 in same plane.Signal S
2(t)+V
2(t) and S
2(t) be added to bias voltage V respectively
1And V
2On, be used for modulating two exciting light sources.Beam shaping 5 is made up of convex lens and lens pillar, the light that detects radiant 4 outgoing impinges perpendicularly on the beam shaping 5, elder generation's planoconvex lens beam-expanding collimation passes through lens pillar again, the light of outgoing is flat beam, this light beam impinges perpendicularly on the silicon chip 6, the diffraction light of outgoing impinges perpendicularly on the silicon chip 7 diffraction once more, and this secondary diffraction light focuses on output on the detector permutation 9 that is placed on its focal plane through lens 8.Scanner driver 3 (10) drives galvanometer 2 (11) rotations, exciting light projects on the minute surface of galvanometer 2 (11) and is reflected onto on the semi-conductor silicon chip, because the rotation of galvanometer minute surface, the exciting light light path changes, be equivalent to exciting light from top to down (from bottom to up) scan-type project on the silicon chip 7 (6).Bias voltage V
1(V
2) be time-independent constant, S
1(t)+V
1(t) (or S
2(t)+V
2(t)) all the time greater than zero, be used for modulating exciting light sources.
The detection radiant is an infrared semiconductor laser, exciting light sources is that optical wavelength is the laser instrument of 830nm, beam shaping is made up of convex lens and lens pillar, and silicon chip is selected the heavy doping silicon chip for use, and photoelectronic detecting array is a semiconductor uncooled ir photoelectronic detecting array.
Space integral is calculated and is finished by following steps:
The excitation laser 1 and 12 that intensity is subjected to the input signal modulation shines on the silicon chip by the galvanometer 2 and 11 of periodic oscillations respectively, form and the corresponding semiconductor carriers grating of signal, project on the lens pillar behind the testing light 4 scioptics beam-expanding collimations, make light beam become a flat beam in the focal plane, interact with two semiconductor carriers gratings 6 and 7 respectively again.The first-order diffraction light light of output focuses on the photodetector array 9 that is placed on the focal plane through lens 8, and realizes correlation integral thereon.
Received signal S
1(t) be added to bias voltage V
1On, and be used for modulating exciting light sources 12, signal S
2(t) be added to bias voltage V
2On, be used for modulating exciting light sources 1, wherein S
1(t)=f (t) cos (ω
cT), S
2(t)=g (t) cos (ω
cT), the light by silicon chip 6 outgoing can be expressed as:
S
1(t，x)＝C
1f(t-x/v)exp[-iω
c(t-x/v)]
Reference signal S
2(t) be added to bias voltage V
2On, and be used for modulating exciting light sources 1.In like manner, if the time humorous uniform planar light wave by silicon chip 7, the light of outgoing can be expressed as:
S
2(t，x)＝C
2g(-x/v-t)exp[-iω
c(x/v-t)]
On back focal plane, form f
1And f
2Long-pending conversion:
Be substitution of variable L=vt and u=t-x/v, calculate along the p=0 place, following formula becomes:
F (0, t) be exactly S
1And S
2Related function.
Claims (2)
1, a kind of space integral electron hole pair correlator, it is characterized in that, comprise and detect radiant (4), beam shaping (5), first silicon chip (6), second silicon chip (7), convex lens (8) and photoelectronic detecting array (9), they are arranged on the same optical axis in turn, and wherein photoelectronic detecting array (9) is placed on the focal plane of convex lens (8); Comprise first scanner driver (3), first galvanometer (2) and first exciting light sources (1), wherein first scanner driver (3) drives first galvanometer (2) rotation, first exciting light sources (1) through the reflected light of first galvanometer (2) be incident on second silicon chip (7) flat beam at grade; Comprise second scanner driver (10), second galvanometer (11) and second exciting light sources (12), wherein second scanner driver (10) is connected with second galvanometer (11), second exciting light sources (12) through the reflected light of second galvanometer (11) with detect radiant (4) through be incident on behind the beam shaping (5) on first silicon chip (6) flat beam at grade; RF signal S
2(t) be added in first exciting light sources (1), be used for modulating first exciting light sources (1), rf signal S
1(t) be added on second exciting light sources (12), be used for modulating second exciting light sources (12).
2, space integral electron hole pair correlator according to claim 1, it is characterized in that, detecting radiant (4) is infrared semiconductor laser, first exciting light sources (1) and second exciting light sources (12) are the laser instrument of 830nm for optical wavelength, beam shaping (5) is made up of convex lens and lens pillar, first silicon chip (6) is selected the heavy doping silicon chip for use, and photoelectronic detecting array is a semiconductor uncooled ir photoelectronic detecting array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710049343A CN100576133C (en) | 2007-06-20 | 2007-06-20 | Space integral electron hole pair correlator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710049343A CN100576133C (en) | 2007-06-20 | 2007-06-20 | Space integral electron hole pair correlator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071314A CN101071314A (en) | 2007-11-14 |
| CN100576133C true CN100576133C (en) | 2009-12-30 |
Family
ID=38898563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710049343A Expired - Fee Related CN100576133C (en) | 2007-06-20 | 2007-06-20 | Space integral electron hole pair correlator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100576133C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323680A (en) * | 2011-09-15 | 2012-01-18 | 电子科技大学 | One-dimensional Fibonacci quasiperiodic photonic crystal based on excess photocarrier |
| CN103152383B (en) * | 2013-01-25 | 2016-06-01 | 中国科学院国家天文台 | Based on large scale digital correlator and the related operation treatment process of GPU architecture |
| CN103712687B (en) * | 2014-01-06 | 2015-05-20 | 中国科学院光电技术研究所 | High-power ultraviolet laser beam characteristic measurement and recording method based on photocarrier radiation technology |
| CN110161512B (en) * | 2019-05-08 | 2021-08-17 | 深圳市速腾聚创科技有限公司 | Multi-line laser radar |
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2007
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| Publication number | Publication date |
|---|---|
| CN101071314A (en) | 2007-11-14 |
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Granted publication date: 20091230 Termination date: 20200620 |