CN100576133C - space-integrating electron-hole pair correlator - Google Patents
space-integrating electron-hole pair correlator Download PDFInfo
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- 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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- light source
- excitation light
- silicon chip
- vibrating mirror
- scanning driver
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 32
- 239000010703 silicon Substances 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
本发明公开了一种空间积分电子空穴对相关器，其特征在于，包括检测光光源4、光束整形器5、硅片6、硅片7、凸透镜8和光电探测阵列9，它们顺次设置在同一光轴上；包括扫描驱动器1、振镜2和激发光光源3，其中扫描驱动器3和振镜2连接，激发光光源1经过振镜2的反射光与入射在硅片7上的扁平光束在同一平面上；包括扫描驱动器10、振镜11和激发光光源12，其中扫描驱动器10和振镜11连接，激发光光源12经过振镜11的反射光与检测光光源4经光束整形器5后入射在硅片6上的扁平光束在同一平面上；射频信号S2(t)加在激发光光源1，用来调制激发光光源1，射频电信号S1(t)加在激发光光源12上，用来调制激发光光源12。
The invention discloses a space-integrated electron-hole pair correlator, which is characterized in that it includes a detection light source 4, a beam shaper 5, a silicon chip 6, a silicon chip 7, a convex lens 8 and a photoelectric detection array 9, which are arranged in sequence On the same optical axis; including a scanning driver 1, a vibrating mirror 2 and an excitation light source 3, wherein the scanning driver 3 is connected to the vibrating mirror 2, and the reflected light of the exciting light source 1 passing through the vibrating mirror 2 and the flat surface incident on the silicon wafer 7 The light beam is on the same plane; including a scanning driver 10, a vibrating mirror 11 and an excitation light source 12, wherein the scanning driver 10 is connected to the vibrating mirror 11, and the reflected light of the excitation light source 12 passing through the vibrating mirror 11 and the detection light source 4 pass through a beam shaper 5, the flat light beam incident on the silicon wafer 6 is on the same plane; the radio frequency signal S 2 (t) is added to the excitation light source 1 to modulate the excitation light source 1, and the radio frequency signal S 1 (t) is added to the excitation light source 1 The light source 12 is used to modulate the excitation light source 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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710049343A CN100576133C (en) | 2007-06-20 | 2007-06-20 | space-integrating electron-hole pair correlator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710049343A CN100576133C (en) | 2007-06-20 | 2007-06-20 | space-integrating electron-hole pair correlator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071314A CN101071314A (en) | 2007-11-14 |
| CN100576133C true CN100576133C (en) | 2009-12-30 |
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ID=38898563
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710049343A Expired - Fee Related CN100576133C (en) | 2007-06-20 | 2007-06-20 | space-integrating electron-hole pair correlator |
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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-like quasi-periodic photonic crystals based on excess photocarriers |
| CN103152383B (en) * | 2013-01-25 | 2016-06-01 | 中国科学院国家天文台 | Large-Scale Digital Correlator and Correlation Operation Processing Method Based on 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 measuring 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
- 2007-06-20 CN CN200710049343A patent/CN100576133C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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