CN107703696A - A kind of optical analog to digital conversion device back-end circuit device and processing method - Google Patents
A kind of optical analog to digital conversion device back-end circuit device and processing method Download PDFInfo
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- CN107703696A CN107703696A CN201711216378.5A CN201711216378A CN107703696A CN 107703696 A CN107703696 A CN 107703696A CN 201711216378 A CN201711216378 A CN 201711216378A CN 107703696 A CN107703696 A CN 107703696A
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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
- G02F7/00—Optical analogue/digital converters
Abstract
A kind of high-precision optical analog to digital conversion device back-end circuit device and processing method, including optical-electrical converter and electric analog-digital converter, it is characterized in also having electric signal amplification successively and bias circuit and matched filter between described optical-electrical converter and electric analog-digital converter.The present invention passes through amplification and bias circuit and matched filter, it is possible to increase electric analog-digital converter quantifies the utilization rate of range, suppresses opto-electronic conversion, amplification with the noise that bias introduces to influence caused by quantized result, so as to improve the quantified precision of whole system.
Description
Technical field
The present invention relates to optical information processing technology, specifically a kind of high-precision optical analog to digital conversion device back-end circuit device and place
Reason method.
Background technology
Analog-digital converter (ADC:Analog to Digital Converter) natural analog signal can be converted to
Virtual data signal, it is the basis of the current scientific and technological information society of structure.
Traditional electric analog-digital converter (EADC:Electronic ADC) while high speed development, also moving closer to property
The limit of energy." electronic bottlenecks " such as electric sampling clock are shaken, comparator is fuzzy limits its and further improved.Optics analog-to-digital conversion
Device (PADC:Photonic ADC) Optical Sampling pulse high stability the characteristics of, for break through " electronic bottleneck ", to high frequency width believe
Number complete analog-to-digital conversion provide possibility.
Optical analog to digital conversion device is that one kind is used as sampling clock, Mach-Zehnder modulators by the use of high stable light pulse sequence
To signal sampling, photoelectric hybrid optical analog to digital conversion scheme that photodetector and electric analog-digital converter quantify (Khilo A,
Spector S J,Grein M E,et al.Photonic ADC:overcoming the bottleneck of
electronic jitter[J].Optics Express,2012,20(4):4454-4469.).In this configuration, with quilt
The unrelated unmodulated component of sampled signal takes the quantization range of the electric analog-digital converter in part, causes the quantization of electric analog-digital converter
Precision will decline, and then limit the significant bit digit upper limit of whole system.In addition, in order to ensure that photodetector is in line
Sex work area, it, which is inputted, to be low-power level signal (Juodawlkis P W, Hargreaves J J, Twichell J
C.Impact of photodetector nonlinearities on photonic analog-to-digital
converters[C]//Lasers&Electro-optics,CLEO 02Technical Digest Summaries of
Papers Presented at the.IEEE,2002:11-12vol.1.).Due to input photodetector luminous power compared with
Small, its output signal amplitude is also limited, it is therefore desirable to is amplified using amplifier.Photodetector and amplifier are as active
Device, inevitably it is introduced into additional noise.The noise penalty additionally introduced is by the matter of electric analog-digital converter sampled signal
Amount, signal to noise ratio is reduced, and then reduce the significant bit digit of analog-digital converter, limit systematic function.
The optical analog to digital conversion device scheme reported at present not yet considers electric analog-digital converter range accounting and electric rear end noise pair
The influence of whole system.Juodawlkis P W et al. propose to utilize " integration-replacement " circuit (PHIRcircuits:
Photonic Integrate and Reset circuits) result that integrates single electrical pulse energy quantifies
(Juodawlkis P W,Twichell J C,Betts G E,et al.Optically sampled analog-to-
digital converters[J].IEEE Transactions on Microwave Theory&Techniques,2001,
49(10):1840-1853.).This mode can improve signal to noise ratio to a certain extent, but cannot be guaranteed EADC to electric pulse
Sampling instant instantaneous signal-to-noise ratio it is maximum.
The content of the invention
For above-mentioned the deficiencies in the prior art, the present invention provide a kind of high-precision optical analog to digital conversion device back-end circuit device with
Processing method.Compared with traditional optical analog to digital conversion device structure, treatment method adds amplification and bias in back-end circuit
Circuit, coordinate amplifier that the quantization range of electric analog-digital converter is fully used；Meanwhile add matched filtering
Device so that in electric analog-digital converter sampling instant instantaneous signal power to the ratio between noise average power maximum, after inhibiting
Influence of the noise that terminal circuit (photodetector, amplifier etc.) introduces to analog-digital converter significant bit digit.
The technical solution of the present invention is as follows：
A kind of optical analog to digital conversion device back-end circuit device, is characterized in, in described optical-electrical converter and electric analog-to-digital conversion
There are electric signal amplification successively and bias circuit and matched filter between device.
The processing procedure of above-mentioned optical analog to digital conversion device back-end circuit device is as follows：
1) light pulse sequence is changed into electric impulse signal by the opto-electronic conversion described in.
2) electric impulse signal is amplified to modulation product by amplification described in and bias circuit, and to take electric analog-digital converter whole
Range ability.Meanwhile electric impulse signal is biased into unmodulated component not in electric analog-digital converter range ability.
3) matched filter described in input signal by filtering so that filtered electric pulse peak point signal to noise ratio is most
Greatly.The frequency response of matched filter is
Wherein, SnThe frequency spectrum for the noise that (ω) introduces for circuit before matched filter (opto-electronic conversion, amplification and bias etc.),
A (ω) is the frequency spectrum into the single electric pulse before matched filter, and * represents conjugate operation.
4) the electric analog-digital converter carries out sample quantization to the peak point of matched filter output signal, and exports numeral
Signal.
Compared with prior art, advantages below of the present invention：
1) amplification and bias circuit are passed through so that carry and be sampled the light pulse sequence modulation product of signal and occupy entirely
The quantization range of electric analog-digital converter, electric analog-digital converter quantified precision is made full use of, improve the quantified precision of whole system.
2) matched filter is used so that the signal to noise ratio of electric analog-digital converter sampling instant is maximum, can effectively suppress photoelectricity
The influence of the noise of introducing such as conversion and amplification, improve the quantified precision of whole system.
Brief description of the drawings
Fig. 1 is the structured flowchart of the most preferred embodiment of optical analog to digital conversion device back-end circuit device of the present invention.
Fig. 2 is amplification and relation schematic diagram of the electric pulse before and after bias with quantifying range.
Fig. 3 is matched filter input and output and sampling instant schematic diagram.
Embodiment
1 provide a most preferred embodiment of the invention below in conjunction with the accompanying drawings.Presently preferred embodiment is with the technical side of the present invention
Implemented premised on case, give detailed embodiment and process, but protection scope of the present invention is not limited to following realities
Apply example.
In presently preferred embodiment, as shown in figure 1, the system includes successively：Photodetector 1, amplification and bias circuit 2,
Matched filter 3, electric analog-digital converter 4.
The modulated light pulse train that carrying is sampled signal by described photodetector 1 is converted to electrical pulse sequence.
Electric impulse signal is amplified to modulation product by described amplification with bias circuit 2 can take the whole range model of electric analog-digital converter
Enclose；Meanwhile electric impulse signal is biased into unmodulated component not in electric analog-digital converter range ability, as shown in Figure 2.It is described
Matched filter 3 by being filtered to input signal, filtered electric pulse peak point have maximum signal to noise ratio.Matching filter
The frequency response of ripple device is determined by following formula.
Wherein, SnThe frequency spectrum for the noise that (ω) introduces for circuit before matched filter (opto-electronic conversion, amplification and bias etc.).
The frequency spectrum can be determined by noise analyzer etc..A (ω) is the frequency spectrum into the single electric pulse before matched filter, and * is represented altogether
Yoke computing；A (ω) can be obtained by the Fourier transformation of the single electric pulse shape of input matched filter.Described electric modulus
Converter 4 carries out sample quantization, and output digit signals to filtered electric pulse peak point, as shown in Figure 3.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (3)
1. a kind of high-precision optical analog to digital conversion device back-end circuit device, including optical-electrical converter (1) and electric analog-digital converter (4),
It is characterized in that there is electric signal amplification and bias successively between described optical-electrical converter (1) and electric analog-digital converter (4)
Circuit (2) and matched filter (3).
2. high-precision optical analog to digital conversion device back-end circuit device according to claim 1, it is characterized in that, described matching filter
The frequency response of ripple device (3) meets equation below：
<mrow>
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<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
<mo>&Proportional;</mo>
<mfrac>
<mrow>
<msup>
<mi>A</mi>
<mo>*</mo>
</msup>
<mrow>
<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mi>exp</mi>
<mrow>
<mo>(</mo>
<mo>-</mo>
<msub>
<mi>j&omega;t</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein, SnThe frequency spectrum for the noise that (ω) introduces for circuit before matched filter, A (ω) are into the list before matched filter
The frequency spectrum of individual electric pulse, * represent conjugate operation.
3. the method handled using the high-precision optical analog to digital conversion device back-end circuit device described in claim 1 or 2, it is special
Sign is that the processing procedure is as follows：
1) optical-electrical converter (1) by the light pulse sequence of reception switch to electric impulse signal be transferred to electric signal amplification and bias circuit
(2)；
2) the electric signal amplification described in is amplified with bias circuit (2) to electric impulse signal, modulation product is taken described electric mould
The whole quantization range ability of number converter (4), meanwhile, bias is imposed to electric impulse signal, makes unmodulated component not described
Electric analog-digital converter (4) quantization range ability in；
3) matched filter (3) filters to input signal so that filtered electric pulse peak point has the signal to noise ratio of maximum, described
The frequency response of matched filter (3) be：
<mrow>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
<mo>&Proportional;</mo>
<mfrac>
<mrow>
<msup>
<mi>A</mi>
<mo>*</mo>
</msup>
<mrow>
<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>&omega;</mi>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mi>exp</mi>
<mrow>
<mo>(</mo>
<mo>-</mo>
<msub>
<mi>j&omega;t</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein, SnThe frequency spectrum for the noise that (ω) introduces for circuit before matched filter (opto-electronic conversion, amplification and bias etc.), A (ω)
To enter the frequency spectrum of the single electric pulse before matched filter, * represents conjugate operation；
4) electric analog-digital converter (4) carries out sample quantization to the peak point of described matched filter (3) output signal, and exports
Data signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711216378.5A CN107703696A (en) | 2017-11-28 | 2017-11-28 | A kind of optical analog to digital conversion device back-end circuit device and processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711216378.5A CN107703696A (en) | 2017-11-28 | 2017-11-28 | A kind of optical analog to digital conversion device back-end circuit device and processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712215A (en) * | 2018-03-06 | 2018-10-26 | 上海交通大学 | Configurable microwave photon Digital Channelized Receiving device |
| WO2019184365A1 (en) * | 2018-03-29 | 2019-10-03 | 上海交通大学 | Optical digital signal receiving device based on waveform matching |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367488A (en) * | 2002-01-11 | 2002-09-04 | 清华大学 | Method for eliminating signal crossfire between wavelengths in multiwavelength multilayer optic disk and its system |
| CN1808285A (en) * | 2006-01-26 | 2006-07-26 | 上海微电子装备有限公司 | High-precision analog-to-digital converter based on PGA and control method thereof |
| CN101285692A (en) * | 2008-06-04 | 2008-10-15 | 中国科学院长春光学精密机械与物理研究所 | Delicate signal detection device |
| US8269658B1 (en) * | 2010-01-21 | 2012-09-18 | The United States Of America As Represented By The Secretary Of The Navy | Photonic analog-to-digital conversion using the robust symmetrical number system |
| CN106444215A (en) * | 2016-08-30 | 2017-02-22 | 上海交通大学 | Optical analog-digital converter with configurable frequency response |
-
2017
- 2017-11-28 CN CN201711216378.5A patent/CN107703696A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367488A (en) * | 2002-01-11 | 2002-09-04 | 清华大学 | Method for eliminating signal crossfire between wavelengths in multiwavelength multilayer optic disk and its system |
| CN1808285A (en) * | 2006-01-26 | 2006-07-26 | 上海微电子装备有限公司 | High-precision analog-to-digital converter based on PGA and control method thereof |
| CN101285692A (en) * | 2008-06-04 | 2008-10-15 | 中国科学院长春光学精密机械与物理研究所 | Delicate signal detection device |
| US8269658B1 (en) * | 2010-01-21 | 2012-09-18 | The United States Of America As Represented By The Secretary Of The Navy | Photonic analog-to-digital conversion using the robust symmetrical number system |
| CN106444215A (en) * | 2016-08-30 | 2017-02-22 | 上海交通大学 | Optical analog-digital converter with configurable frequency response |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712215A (en) * | 2018-03-06 | 2018-10-26 | 上海交通大学 | Configurable microwave photon Digital Channelized Receiving device |
| WO2019184365A1 (en) * | 2018-03-29 | 2019-10-03 | 上海交通大学 | Optical digital signal receiving device based on waveform matching |
| US10797803B2 (en) | 2018-03-29 | 2020-10-06 | Shanghai Jiao Tong University | Waveform matching based optical digital signal receiving device |
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