CN107505056A - A kind of GHz near-infrared single photon detectors avalanche signal extraction system - Google Patents
A kind of GHz near-infrared single photon detectors avalanche signal extraction system Download PDFInfo
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- CN107505056A CN107505056A CN201710760271.0A CN201710760271A CN107505056A CN 107505056 A CN107505056 A CN 107505056A CN 201710760271 A CN201710760271 A CN 201710760271A CN 107505056 A CN107505056 A CN 107505056A
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- 238000000605 extraction Methods 0.000 title claims abstract description 14
- 230000003321 amplification Effects 0.000 abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 4
- 238000012421 spiking Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
A kind of GHz near-infrared single photon detectors avalanche signal extraction system, door pulse signal generator is carried in the negative electrode of avalanche diode by electric capacity C1, bias voltage units are carried in the negative electrode of avalanche diode by resistance R1, the anode of avalanche diode connects resistance R2 ground connection and difference amplifier respectively, the two-way output end of difference amplifier, it is equal in magnitude that two-way is exported respectively, the signal of opposite in phase, wherein it is directly inputted to bundling device without delay all the way, another way signal is input to bundling device after the delay of a cycle, bundling device output end exports avalanche signal.Compared with prior art, from avalanche signal and the spiking beam splitting after difference amplifier differential amplification of avalanche diode output in the present invention, beam splitting goes out that two-way is equal in magnitude, signal of opposite in phase, because avalanche signal is amplified in difference amplifier, amplifier need not additionally be added, the approach that noise coupling enters avalanche signal is reduced, reduces the lengthy and jumbled degree of circuit system.
Description
Technical field
The present invention relates to optical signal detection technical field, more particularly to a kind of GHz near-infrared single photon detectors snowslide letter
Number extraction system.
Background technology
In GHz near-infrared single photon detectors, extraction avalanche signal has a variety of methods, as shown in figure 1, being one of which
Common method.The workflow of the circuit is：1. bias voltage is carried in avalanche photodide (APD) the moon by resistance R1
On extremely, door pulse signal is carried on APD negative electrodes by electric capacity C1；2. avalanche signal and spike noise are by APD anodes, by adopting
Sample resistance R2 is exported；3. the signal exported is divided into two equal-sized signals through power splitter, signal is straight without delay all the way
Connect and be input to subtracter, another way signal is input to subtracter after the delay of a cycle；4. it is input in subtracter
Two signal subtractions, spike noise are suppressed, and avalanche signal can extract.But the avalanche signal amplitude extracted compared with
It is low, it is necessary to exported again to subsequent process circuit after additional amplifier amplifies, add the lengthy and jumbled degree of circuit system.
The content of the invention
Present invention aims at a kind of GHz near-infrared single photon detectors avalanche signal extraction system is provided, to solve now
There is the avalanche signal amplitude extracted in technology during single photon detection relatively low, it is necessary to after additional amplifier amplifies again
Export to subsequent process circuit, increase the technical bug of the lengthy and jumbled degree of circuit system.
The technical proposal of the invention is realized in this way：
A kind of GHz near-infrared single photon detectors avalanche signal extraction system, including avalanche diode, door pulse signal hair
Raw device and bias voltage units, the door pulse signal generator are carried in the negative electrode of avalanche diode, institute by electric capacity C1
The negative electrode that bias voltage units are carried in avalanche diode by resistance R1 is stated, the anode of the avalanche diode connects electricity respectively
Hinder R2 ground connection and difference amplifier, the two-way output end of the difference amplifier exports that two-way is equal in magnitude, phase phase respectively
Anti- signal, wherein being directly inputted to bundling device without delay all the way, another way signal is defeated after the delay of a cycle
Enter to bundling device, the bundling device output end exports avalanche signal.
Compared with prior art, the present invention has following beneficial effect：
The GHz near-infrared single photon detector avalanche signal extraction systems of the present invention, from the snowslide of avalanche diode output
The beam splitting after difference amplifier differential amplification of signal and spiking, beam splitting go out that two-way is equal in magnitude, letter of opposite in phase
Number, wherein being directly inputted to bundling device without delay all the way, another way signal is input to conjunction after the delay of a cycle
Beam device, then two paths of signals is added in bundling device, and spike noise is suppressed, and avalanche signal can extract, due in difference
Avalanche signal is amplified in point amplifier, it is not necessary to additionally adds amplifier, original tertiary treatment circuit is improved to be changed into
Two stages for the treatment of circuit, reduce noise coupling and enter the approach of avalanche signal, while be advantageous to reduce PCB surface product, reduce system
The lengthy and jumbled degree of circuit.
Brief description of the drawings
Fig. 1 is the schematic diagram of avalanche signal extraction system in the prior art；
Fig. 2 is the schematic diagram of GHz near-infrared single photon detectors avalanche signal extraction system of the present invention；
Fig. 3 is the timing diagram of snowslide signal extraction in the present invention.
In figure：Avalanche diode 100, door pulse signal generator 200, bias voltage units 300, difference amplifier 400,
Bundling device 500.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the present invention is clearly and completely described.
As shown in Fig. 2 a kind of GHz near-infrared single photon detectors avalanche signal extraction system, including avalanche diode
100th, door pulse signal generator 200 and bias voltage units 300, the door pulse signal generator 200 pass through electric capacity C1
The negative electrode of avalanche diode 100 is carried in, the bias voltage units 300 are carried in avalanche diode 100 by resistance R1
Negative electrode, the anode of the avalanche diode 100 connect resistance R2 ground connection and difference amplifier 400, the differential amplification respectively
The two-way output end of device 400, exports that two-way is equal in magnitude, signal of opposite in phase respectively, wherein direct without delay all the way
Bundling device 500 is input to, another way signal is input to bundling device 500 after the delay of a cycle, and the bundling device 500 is defeated
Go out end output avalanche signal.When external optical signal is incident to the test surface of avalanche diode 100, avalanche diode 100 produces snow
Signal is collapsed, and door pulse signal can generate periodic spiking, avalanche signal and spike noise by avalanche diode 100
By the anode of avalanche diode 100, exported by resistance R2；As shown in figure 3, the signal of output is put by difference amplifier 400
Greatly, and export that two-way amplitude is equal, signal of opposite in phase, wherein signal is directly inputted to bundling device without delay all the way
500, another way signal is input to bundling device 500 after the delay of a cycle；It is input to two signal phases of bundling device 500
After adding, spike noise is suppressed, and avalanche signal can extract.Because in difference amplifier 400, avalanche signal has been put
Greatly, so the signal of bundling device output can no longer amplify, it is directly output to subsequent process circuit.
Knowable to the structure of the comprehensive present invention, GHz near-infrared single photon detector avalanche signal extraction systems of the invention, from
Avalanche signal and the spiking beam splitting after difference amplifier differential amplification of avalanche diode output, it is big that beam splitting goes out two-way
Small equal, opposite in phase signal, wherein being directly inputted to bundling device without delay all the way, another way signal passes through a week
Bundling device is input to after the delay of phase, then two paths of signals is added in bundling device, and spike noise is suppressed, and avalanche signal can be with
Extract, because avalanche signal is amplified in difference amplifier, it is not necessary to amplifier is additionally added, at original three-level
Circuit is improved is changed into two stages for the treatment of circuit for reason, reduces noise coupling and enters the approach of avalanche signal, while is advantageous to reduce PCB
Area, reduce the lengthy and jumbled degree of circuit system.
Claims (1)
1. a kind of GHz near-infrared single photon detectors avalanche signal extraction system, including avalanche diode, door pulse signal occur
Device and bias voltage units, the door pulse signal generator is carried in the negative electrode of avalanche diode by electric capacity C1, described
Bias voltage units are carried in the negative electrode of avalanche diode by resistance R1, it is characterised in that：The anode of the avalanche diode
Resistance R2 ground connection and difference amplifier are connected respectively, the two-way output end of the difference amplifier, export two-way size respectively
Equal, opposite in phase signal, wherein being directly inputted to bundling device without delay all the way, another way signal passes through a cycle
Delay after be input to bundling device, the bundling device output end exports avalanche signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760271.0A CN107505056A (en) | 2017-08-30 | 2017-08-30 | A kind of GHz near-infrared single photon detectors avalanche signal extraction system |
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| CN201710760271.0A CN107505056A (en) | 2017-08-30 | 2017-08-30 | A kind of GHz near-infrared single photon detectors avalanche signal extraction system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020326A (en) * | 2017-12-29 | 2018-05-11 | 浙江九州量子信息技术股份有限公司 | A kind of single-photon avalanche signal extracting circuit with the high suppression ratio of spike |
| CN109883558A (en) * | 2019-03-18 | 2019-06-14 | 清华大学 | Device and method for measuring avalanche signal of avalanche photodiode |
| CN111244192A (en) * | 2018-11-29 | 2020-06-05 | 北京小米移动软件有限公司 | Control circuit, distance sensor module and mobile terminal of SPAD |
| CN112393810A (en) * | 2019-08-16 | 2021-02-23 | 华为技术有限公司 | Single photon detection device and method |
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| KR20100120808A (en) * | 2009-05-07 | 2010-11-17 | 주식회사 바이옵틱 | A method to supply pulse bias to an avalanche photo diode by optically utilizing serially connected photo diode to it and to eliminate after pulse using flyback diode in an optical detection circuit operated in geiger mode constructed with an avalanche photo diode. |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108020326A (en) * | 2017-12-29 | 2018-05-11 | 浙江九州量子信息技术股份有限公司 | A kind of single-photon avalanche signal extracting circuit with the high suppression ratio of spike |
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| CN111244192A (en) * | 2018-11-29 | 2020-06-05 | 北京小米移动软件有限公司 | Control circuit, distance sensor module and mobile terminal of SPAD |
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Application publication date: 20171222 |
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