CN104460051A - Photoelectric sampler based on electro-optical modulation - Google Patents
Photoelectric sampler based on electro-optical modulation Download PDFInfo
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- CN104460051A CN104460051A CN201410640301.0A CN201410640301A CN104460051A CN 104460051 A CN104460051 A CN 104460051A CN 201410640301 A CN201410640301 A CN 201410640301A CN 104460051 A CN104460051 A CN 104460051A
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- lens
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- enters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
- G02F1/0311—Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal
Abstract
The invention discloses a photoelectric sampler based on electro-optical modulation. The photoelectric sampler comprises a clock signal source, wherein the input clock signal source shoots in through the a1 end of a first lens and shoots out through the a2 end of the first lens, light shooting out of the a2 end of the first lens shoots in through the b1 end of a polarizer and shoots out through the b2 end of the polarizer, light shooting out of the b2 end of the polarizer shoots in through the c1 end of an electro-optical crystal and shoots out through the c2 end of the electro-optical crystal, light shooting out of the c2 end of the electro-optical crystal shoots in through the d1 end of a quarter-wave plate and shoots out through the d2 end of the quarter-wave plate, light shooting out of the d2 end of the quarter-wave plate shoots in through the e1 end of a band-pass filter and shoots out through the e2 end of the band-pass filter, light shooting out of the e2 end of the band-pass filter shoots in through the f1 end of an analyzer and shoots out through the f2 end of the analyzer, and light shooting out of the f2 end of the analyzer shoots in through the g1 end of a second lens, shoots out through the g2 end of the second lens and finally enters a photodetector.
Description
Technical field
The invention belongs to opto-electronic information technology field, be specifically related to a kind of photoelectricity sampler based on electrooptical modulation.
Background technology
Along with the high speed development of photoelectron technology, photoelectricity sampling is employed more and more in technical field of photo communication.
Modulation is an important step in electro-optical system, and the object of modulation the signal of required process or the information that is transmitted is carried out to the conversion of certain form, makes it be convenient to process, transmission and detect.Conventional is the methods such as acoustooptic modulation at present, and these class methods existing exist the defects such as transmission speed is slow, antijamming capability is weak, confidentiality is poor, complex structure, cost are high, noise is large.
Summary of the invention
For the shortcoming in existing electrical domain sampling, the invention provides a kind of photoelectricity sampler based on electrooptical modulation, it not only has extremely low time jitter, faster time response, also has low noise and other advantages.
Compared with photoelectricity sampling samples with traditional electrical domain, there is no the restriction of processor processing speed, and there is the advantages such as narrower pulse width, extremely low time jitter and ultrafast time response.Photoelectricity sampling has traditional electrical domain and samples the advantage that can not compare, and becomes the focus in current and optoelectronic information research in the future.Photoelectricity sampler based on electrooptical modulation is easy to realize, and have that transmission speed is fast, antijamming capability is strong, good confidentiality, structure are simple, with low cost, low noise and other advantages.
The technical solution used in the present invention is as follows:
Based on the photoelectricity sampler of electrooptical modulation, comprise the first lens, the second lens, polarizer, electro-optic crystal, quarter-wave plate, bandpass filter, analyzer, signal source of clock, the signal source of clock of input passes through a of the first lens
1end-fire enters, by a of the first lens
2end-fire goes out, from the first lens a
2bring out the b of next light by the polarizer
1end-fire enters, by the b of the polarizer
2end-fire goes out, from the b of the polarizer
2bring out the c of next light by electro-optic crystal
1end enters, by the c of electro-optic crystal
2bring out, from the c of electro-optic crystal
2bring out the d of next light by quarter-wave plate
1end-fire enters, by quarter-wave plate d
2end-fire goes out, from quarter-wave plate d
2bring out the e of next light by bandpass filter
1port enters, by the e of bandpass filter
2port out, from the e of bandpass filter
2port light is out by the f of analyzer
1end-fire enters, by the f of analyzer
2end-fire goes out, from the f of analyzer
2the light that end-fire goes out is by the g of the second lens
1end-fire enters, by the g of the second lens
2end-fire goes out, and finally enters in photodetector.
Polarizer is for generation of linearly polarized photon.
Electro-optic crystal is for generation of electrooptical modulation.
The phase delay that the natural birefringence that quarter-wave plate acts on elimination electro-optic crystal causes, makes it the almost linear relation more accurately described between voltage and transmissivity.
Preferably, clock signal pulse source wavelength is 1550nm.
Preferably, electromotive voltage signal scope is 0 ~ 10V.
Preferably, the sampled clock signal speed of input is 20Gbit/s.
Preferably, described Electrooptic crystal material is lithium columbate crystal.
The present invention is based on the photoelectricity sampler of electrooptical modulation, by the electrooptical effect of electro-optic crystal, light signal is modulated, makes the almost linear relation that the transmissivity of sampled signal changes along with the change of the voltage be added on electro-optic crystal, thus reach the object of sampling.
The present invention adopts quarter-wave plate, can eliminate the birefringence of crystal itself preferably and the impact of the phase delay produced; By regulating the polarization direction of polarizer, the clock signal of input can obtain better electrooptical modulation effect, exports good sample waveform, and the almost linear relation of transmission coefficient with change in voltage is described better.
The photoelectricity sampler of electrooptical modulation of the present invention also have with low cost, be easy to realize, be suitable for the application of laser communication system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the photoelectricity sampler that the present invention is based on electrooptical modulation.
Fig. 2 is that transmission coefficient is with change in voltage schematic diagram.
The voltage of Fig. 3 (a) for electro-optic crystal adds.
The clock signal that Fig. 3 (b) inputs for system.
The Optical Sampling signal that Fig. 3 (c) exports for system.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
As shown in Figure 1, photoelectric sampler based on electrooptical modulation comprises clock signal 1, first lens 2, polarizer 3, electro-optic crystal 4, quarter-wave plate 5, bandpass filter 6, analyzer 7, second lens 8, photodetector 9, the sampled clock signal speed of input is 20Gbit/s, signal wavelength 1550nm, the signal voltage range be added on electro-optic crystal is 0 ~ 10V.
The signal source of clock of input passes through a of the first lens 2
1end (input end) is injected, by a of the first lens 2
2end (output terminal) injection, from a of the first lens 2
2bring out the b of next light by polarizer 3
1end (input end) is injected, by the b of polarizer 3
2end (output terminal) injection, from the b of polarizer 3
2bring out the c of next light by electro-optic crystal 4
1end (input end) enters, by the c of electro-optic crystal 4
2hold (output terminal) out, from the c of electro-optic crystal 4
2bring out the d of next light by quarter-wave plate 5
1end (input end) is injected, by the d of quarter-wave plate 5
2end (output terminal) injection, from the d of quarter-wave plate 5
2bring out the e of next light by bandpass filter 6
1port (input port) enters, by the e of bandpass filter 6
2port (output port) out, from the e of bandpass filter 6
2port light is out by the f of analyzer 7
1end (input end) is injected, by the f of analyzer 7
2end (output terminal) injection, from the f of analyzer 7
2the light that end-fire goes out is by the g of the second lens 8
1end (input end) is injected, by the g of the second lens 8
2end (output terminal) injection, finally enters in photodetector 9.
So the input optical signal that acts on of polarizer produces linearly polarized light, enter into electro-optic crystal.The electrooptical effect that electro-optic crystal two ends produce after adding voltage makes the change of crystal refractive index.The effect of quarter-wave plate is the phase delay that the natural birefringence eliminating electro-optic crystal itself causes.
The present invention is based on the sampling process of the photoelectricity sampler of electrooptical modulation:
1, according to the feature of Electrooptic crystal material, select suitable voltage range, clock signal wave-wave length to meet the output condition of sampled signal.
2, according to the difference of voltage span, transmission coefficient is also different from the almost linear degree of the voltage be added on crystal.
The present invention can obtain the change almost linear relation of transmission coefficient with voltage.See Fig. 2,3.
Above the preferred embodiments of the present invention and principle are described in detail, for those of ordinary skill in the art, according to thought provided by the invention, embodiment will change, and these changes also should be considered as protection scope of the present invention.
Claims (4)
1. based on the photoelectricity sampler of electrooptical modulation, it is characterized in that comprising clock signal (1), the first lens (2), polarizer (3), electro-optic crystal (4), quarter-wave plate (5), bandpass filter (6), analyzer (7), the second lens (8), photodetector (9), the signal source of clock of input passes through a of the first lens
1end-fire enters, by a of the first lens
2end-fire goes out, from the first lens a
2bring out the b of next light by polarizer
1end-fire enters, by the b of the polarizer
2end-fire goes out, from the b of polarizer
2bring out the c of next light by electro-optic crystal
1end enters, by the c of electro-optic crystal
2bring out, from the c of electro-optic crystal
2bring out the d of next light by quarter-wave plate
1end-fire enters, by quarter-wave plate d
2end-fire goes out, from quarter-wave plate d
2bring out the e of next light by bandpass filter
1port enters, by the e of bandpass filter
2port out, from the e of bandpass filter
2port light is out by the f of analyzer
1end-fire enters, by the f of analyzer
2end-fire goes out, from the f of analyzer
2the light that end-fire goes out is by the g of the second lens
1end-fire enters, by the g of the second lens
2end-fire goes out, and finally enters in photodetector.
2., as claimed in claim 1 based on the photoelectricity sampler of electrooptical modulation, it is characterized in that: the sampled clock signal speed of input is 20Gbit/s.
3., as claimed in claim 1 or 2 based on the photoelectricity sampler of electrooptical modulation, it is characterized in that: the wavelength of clock signal is 1550nm, signal voltage range 0 ~ 10V.
4., as claimed in claim 1 based on the photoelectricity sampler of electrooptical modulation, it is characterized in that: described Electrooptic crystal material is lithium columbate crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640301.0A CN104460051A (en) | 2014-11-13 | 2014-11-13 | Photoelectric sampler based on electro-optical modulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640301.0A CN104460051A (en) | 2014-11-13 | 2014-11-13 | Photoelectric sampler based on electro-optical modulation |
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| CN104460051A true CN104460051A (en) | 2015-03-25 |
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| CN201410640301.0A Pending CN104460051A (en) | 2014-11-13 | 2014-11-13 | Photoelectric sampler based on electro-optical modulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117170123A (en) * | 2023-09-07 | 2023-12-05 | 哈尔滨工业大学 | Tunable signal filtering and encrypting method based on electro-optic resonance effect |
Citations (5)
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| US5434693A (en) * | 1993-03-25 | 1995-07-18 | Kokusai Denshin Denwa Kabushiki Kaisha | Optical short pulse generating device |
| CN1490637A (en) * | 2003-07-22 | 2004-04-21 | 中国科学院上海光学精密机械研究所 | Electro-optical tuning flat filter |
| US20050148881A1 (en) * | 2003-12-19 | 2005-07-07 | Fomitchov Ravel A. | High-frequency intensity-modulated incoherent optical source for biomedical optical imaging |
| JP2010161646A (en) * | 2009-01-08 | 2010-07-22 | Sumitomo Electric Ind Ltd | Optical transmitter and optical communication system |
| CN103972783A (en) * | 2014-05-27 | 2014-08-06 | 西安电子科技大学 | Outer control ultraviolet laser power stabilizing system |
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2014
- 2014-11-13 CN CN201410640301.0A patent/CN104460051A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434693A (en) * | 1993-03-25 | 1995-07-18 | Kokusai Denshin Denwa Kabushiki Kaisha | Optical short pulse generating device |
| CN1490637A (en) * | 2003-07-22 | 2004-04-21 | 中国科学院上海光学精密机械研究所 | Electro-optical tuning flat filter |
| US20050148881A1 (en) * | 2003-12-19 | 2005-07-07 | Fomitchov Ravel A. | High-frequency intensity-modulated incoherent optical source for biomedical optical imaging |
| JP2010161646A (en) * | 2009-01-08 | 2010-07-22 | Sumitomo Electric Ind Ltd | Optical transmitter and optical communication system |
| CN103972783A (en) * | 2014-05-27 | 2014-08-06 | 西安电子科技大学 | Outer control ultraviolet laser power stabilizing system |
Non-Patent Citations (3)
| Title |
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| 匡登峰等: "超高速电光采样技术", 《仪器仪表学报》 * |
| 王璐等: "超高速电光采样技术及应用", 《微纳电子技术》 * |
| 贾刚等: "砷化稼高速集成电路内部电信号的光探针直接取样", 《光子学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117170123A (en) * | 2023-09-07 | 2023-12-05 | 哈尔滨工业大学 | Tunable signal filtering and encrypting method based on electro-optic resonance effect |
| CN117170123B (en) * | 2023-09-07 | 2024-03-29 | 哈尔滨工业大学 | Tunable signal filtering and encrypting method based on electro-optic resonance effect |
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Application publication date: 20150325 |