CN107024289A - A kind of single-photon detector of low time jitter - Google Patents
A kind of single-photon detector of low time jitter Download PDFInfo
- Publication number
- CN107024289A CN107024289A CN201710240460.5A CN201710240460A CN107024289A CN 107024289 A CN107024289 A CN 107024289A CN 201710240460 A CN201710240460 A CN 201710240460A CN 107024289 A CN107024289 A CN 107024289A
- Authority
- CN
- China
- Prior art keywords
- signal
- avalanche
- snowslide
- limiting amplifier
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000003321 amplification Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000029918 bioluminescence Effects 0.000 description 1
- 238000005415 bioluminescence Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a kind of single-photon detector of low time jitter, including single photon signal detecting module (1), avalanche signal extraction module (2) and avalanche signal processing module (3)；Single photon signal detecting module (1) includes the avalanche photodide APD being operated under gating patterns；Avalanche signal processing module (3) is limiting amplifier (8), the input of limiting amplifier (8) is connected with the output end of avalanche signal extraction module (2), and the bandwidth of operation of limiting amplifier (8) is more than the bandwidth of the snowslide electric signal；The input signal threshold value of limiting amplifier (8) is more than the amplitude of the background noise in avalanche signal extraction module (2) output signal；The snowslide electric signal is converted into data signal output by limiting amplifier (8)；The present apparatus is simple and reliable, greatly reduces the time jitter of detection system, while not influenceing the performances such as the detection efficient of system, dark count rate.
Description
Technical field
The present invention relates to the fields such as the detection of the faint near infrared light in fiber optic communication field and Quantum Secure Communication, tool
Refer to a kind of single-photon detector of low time jitter body.
Background technology
Single photon detection has a wide range of applications in fields such as spectrum analysis, bioluminescence, accurate measurement, quantum informations.
In current single photon detection scheme, avalanche photodide APD because detection efficient is higher, fast response time, small volume, into
This is low and turns into the single-photon detectors of practicality the most.
When APD is used for single photon detection, the reverse bias voltage that must work in Geiger mode angular position digitizer, i.e. APD is more than its snowslide electricity
Pressure.Under Geiger mode angular position digitizer, APD, which absorbs the carrier produced after single photon, can trigger so-called " self-holding snowslide " process, photoelectric current
Amplified rapidly, produce the snowslide electric signal for being enough to be detected by subsequent conditioning circuit.Due to controlling oneself, snowslide is a positive feedback mistake
Journey, once occur voluntarily to be quenched.To protect APD, and make it can be with continuous probe single photon, it is necessary to after snowslide generation
Avalanche process is quenched in time.The method of common snowslide quenching has：Actively it is quenched, passive quenching and gating patterns.Actively it is quenched
The photon of unknown moment arrival can be detected with passive quenching, but the quenching time of both approaches is longer, therefore detection speed
Rate is typically smaller than megahertz.Gating patterns can reduce the time of snowslide quenching, and its principle is APD reverse DC offset voltage
Less than avalanche voltage, when only single photon pulses are reached, just APD bias voltage is set to be more than snowslide electricity by a gating pulse
Pressure, avalanche process is quenched rapidly with the revocation of gating pulse, so as on the premise of detection efficient is ensured, greatly improve spy
The rate that tests the speed simultaneously reduces dark count rate.
Under gating patterns, the amplitude of snowslide electric signal is random fluctuation, the original for causing snowslide electrical signal amplitude to rise and fall
Because a lot, such as when laser works are in monochromatic light subpattern, the number of photons that each light pulse is included is few, photon reaches detector
Time obey Poisson distribution and cause snowslide response to deviate gate signal center, cause the amplitude of snowslide electric signal to rise at random
Volt.In addition, the position that photon reaches APD device absorbing surfaces is different, the primary power for producing carrier does not know make snowslide yet
The amplitude random fluctuation of electric signal.The avalanche signal processing module of existing single-photon detector is directly by the snowslide telecommunications of extraction
Number comparator is input to, is compared with fixed threshold level, so that snowslide electric signal is converted into data signal as spy
Survey the output of device.Due to the presence of snowslide electrical signal amplitude random fluctuation and background noise, threshold level have to be larger than background and make an uproar
The amplitude of sound, therefore the forward position of output digit signals can move forward and backward, this time with the fluctuating of snowslide electrical signal amplitude
Variable quantity is known as the time jitter of detector, as shown in Figure 3.
In laser ranging, the time jitter degree of single-photon detector directly determines the measurement accuracy of package unit,
The time jitter of existing single-photon detector is general all than larger, it is difficult to meet ranging requirement.
The content of the invention
There is provided one kind detection system can be substantially reduced the invention aims to the deficiency that solve above-mentioned background technology
Time jitter, while not influenceing the single-photon detector of the low time jitter of the performances such as the detection efficient of system, dark count rate.
The technical scheme is that：A kind of single-photon detector of low time jitter, including：For by single photon signal
Be converted to the single photon signal detecting module 1 of snowslide electric signal；For the snowslide electric signal to be visited from the single photon signal
Survey the avalanche signal extraction module 2 extracted in the noise that module 1 is exported；With for by the snowslide electric signal be converted into number
The avalanche signal processing module 3 of word signal；It is characterized in that：The single photon signal detecting module 1 includes being operated in gate mould
Avalanche photodide APD under formula；The avalanche signal processing module 3 is limiting amplifier 8, the limiting amplifier 8
Input is connected with the output end of avalanche signal extraction module 2, and the bandwidth of operation of the limiting amplifier 8 is more than snowslide electricity
The bandwidth of signal；The input signal threshold value of the limiting amplifier 8 is more than in the output signal of avalanche signal extraction module 2
Background noise amplitude；The snowslide electric signal is converted into data signal output by the limiting amplifier 8.
It is preferred that, can the avalanche photodide APD of the single photon signal detecting module 1 two ends Opposite side loading it is straight
Flow voltage VA, the DC voltage VALess than the avalanche voltage V of the avalanche photodideB；Amplitude is VgGate-control signal lead to
Cross the negative electrode that capacitance C is input to the avalanche photodide, the Vg、VAAnd VBMeet VA+Vg>VB, the snowslide light
The anode of electric diode is the output end of the single photon signal detecting module 1.
It is preferred that, the gate-control signal can be that frequency is fgSinusoidal signal, the avalanche signal extraction module 2 can be in
Frequency of heart is respectively fg、2fg、3fgBandstop filter 4,5,6 and low noise RF small signals amplifier 7 be serially connected composition.
It is preferred that, the gate-control signal can be sinusoidal signal, and the avalanche signal extraction module 2 may include the low pass of series connection
Wave filter and low noise RF small signals amplifier, the cut-off frequency of the low pass filter are less than the frequency of the gate-control signal
And more than the bandwidth of the snowslide electric signal.
The operation principle of the present invention：The present invention is using being operated in avalanche photodide APD under gating patterns by monochromatic light
Subsignal is converted to snowslide electric signal output to avalanche signal extraction module 2, the signal of the avalanche photodide APD outputs
In also include gated noise, after the avalanche signal extraction module 2 extracts the snowslide electric signal from gated noise
Export to avalanche signal processing module 3, the avalanche signal processing module 3 replaces traditional comparator using limiting amplifier,
The snowslide electric signal of input is converted into data signal output.
Inevitably include a certain amount of background noise in signal due to inputting the avalanche signal processing module 3,
The comparator that conventional solution is used, its threshold level have to be larger than the amplitude of background noise, and the time jitter of introducing is for example attached
Shown in Fig. 3 (b).
Limiting amplifier is commonly used in the photoreceiver part of optic communication.Limiting amplifier, which is received, is presented binary bit stream
Input signal, with plus and blowup input signal to saturation state, and export present binary bit stream substantive second order output
Signal.On the one hand limiting amplifier meets higher gain and larger bandwidth as the Key Circuit of photoreceiver part
It is required that, on the other hand meet in larger input dynamic range, output voltage swing is held essentially constant, and is follow-up clock recovery
Circuit and data decision circuit provide a stable operation level.
The snowslide electric signal that the avalanche signal extraction module 2 of the present invention is exported and input saturation amplifier in photoreceiver
Signal is similar, therefore the avalanche signal processing module 3 of the present invention uses limiting amplifier.The input signal of limiting amplifier is set
Threshold value be slightly larger than background noise amplitude, make background noise be not limited amplifier amplification.The limiting amplifier output
The time jitter of data signal is determined by the certainty jitter parameter of the limiting amplifier device, shown in such as Fig. 4 (b).
Advantages of the present invention effect：Avalanche signal processing module 3 uses limiting amplifier by the snowslide of amplitude random fluctuation
Electric signal is converted into the data signal that the rise time is consistent, amplitude is equal, compared with traditional comparator, can be greatly reduced by
Time jitter caused by being risen and fallen in snowslide electrical signal amplitude.In addition, the present invention is simple and reliable, for all working in gating patterns
Single-photon detector be all suitable for, be the feasible program for reducing single-photon detection system time jitter with preferable versatility.
Brief description of the drawings
Fig. 1 is the system block diagram of the embodiment of the present invention；
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention；
Fig. 3 is the signal transacting schematic diagram of the avalanche signal processing module 3 using comparator；
Fig. 4 is the signal transacting schematic diagram of the avalanche signal processing module 3 of the embodiment of the present invention；
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The single-photon detector of low time jitter shown in Fig. 1, including single photon signal detecting module 1, avalanche signal is carried
Modulus block 2 and avalanche signal processing module 3.The single photon signal detecting module 1 is used to single photon signal being converted to snowslide
Electric signal.The single photon signal detecting module 1 includes avalanche photodide APD, by DC voltage VAOpposite side loading is in institute
State the two ends of avalanche photodide, the DC voltage VALess than the avalanche voltage V of the avalanche photodideB；Amplitude is
VgGate-control signal is input to the negative electrode of the avalanche photodide from gate-control signal input 1.2 by capacitance C, described
Gate-control signal is that frequency is fgSinusoidal signal, the Vg、VAAnd VBMeet VA+Vg>VB；The pulsed light that laser is produced passes through
Single-photon source is coupled to the avalanche photodide APD with tail optical fiber by decay as single-photon source.The avalanche photodide
Anode be the single photon signal detecting module 1 output end.
Avalanche photodide APD is operated under sinusoidal gating patterns described in the present embodiment, due to depositing for APD junction capacity
The noise produced in the coupling of, junction capacity can badly influence the output signal-to-noise ratio of single photon signal detecting module 1, interference snowslide electricity
The correct extraction of signal.When driving avalanche photodide APD using sinusoidal gate-control signal, junction capacity coupled noise is mainly distributed
On the fundamental frequency and higher harmonic components with sinusoidal gate-control signal with frequency, the junction capacity coupled noise is gated noise.Therefore
In the present embodiment, the signal that the single photon signal detecting module 1 is exported is by snowslide electric signal and gated noise Signal averaging group
Into wherein gated noise signal is very strong, and snowslide electrical signal intensity is very weak, and the faint snowslide electric signal appears in gated noise
At the zero crossing of signal.
The avalanche signal extraction module 2 is used to extract the snowslide electric signal from the gated noise, institute
The output end for stating single photon signal detecting module 1 is connected with the input of the avalanche signal extraction module 2.The avalanche signal
Extraction module 2 can be respectively f by centre frequencyg、2fg、3fgBandstop filter 4,5,6 and low noise RF small signals amplifier
7 are serially connected composition, as shown in Fig. 2 wherein, the position of bandstop filter 4,5,6 and low noise RF small signals amplifier 7 can
Arbitrarily to exchange.The avalanche signal extraction module 2 also can be mutual by low pass filter and low noise RF small signals amplifier
It is composed in series, the cut-off frequency of the low pass filter is less than the frequency f of the sinusoidal gate-control signalgAnd more than snowslide electricity
The bandwidth of signal.
The avalanche signal processing module 3 is used to the snowslide electric signal being converted into data signal output, the snowslide
The output end of signal extraction module 2 is connected with the input of the avalanche signal processing module 3.Input the avalanche signal processing
The signal of module 3 is made up of snowslide electric signal and background noise Signal averaging, such as shown in Fig. 3 (a) and Fig. 4 (a).
In traditional technical scheme, the avalanche signal processing module 3 is comparator, and the threshold level of the comparator is big
In the amplitude of background noise, shown in the time jitter Δ t1 such as accompanying drawings 3 (b) of introducing.
The avalanche signal processing module 3 of the present embodiment uses limiting amplifier 8, as shown in Figure 2.The limiting amplifier 8
Bandwidth of operation be more than the snowslide electric signal bandwidth.The input signal threshold value of the limiting amplifier 8 is slightly larger than described
The amplitude of background noise, make background noise be not limited amplifier amplification.The data signal that the limiting amplifier 8 is exported when
Jitter Δ t2 is determined by the certainty jitter parameter of the limiting amplifier device, shown in such as Fig. 4 (b).Because of limiting amplifier
With plus and blowup input signal to saturation state, the time jitter Δ t2 of its data signal exported is much smaller than traditional comparison
The time jitter Δ t1 of the data signal of device output.
The time jitter degree of single-photon detector is significant in its application, such as in laser ranging, single
The time jitter degree of photon detector directly determines the measurement accuracy of package unit, by low time jitter described in the present embodiment
Single-photon detector be applied to laser ranging system can greatly improve range accuracy.
The present invention is not limited to above-mentioned embodiment, in the knowledge that those of ordinary skill in the art possess, also
It can be made a variety of changes on the premise of present inventive concept is not departed from.
Claims (4)
1. a kind of single-photon detector of low time jitter, including：
Single photon signal detecting module (1) for single photon signal to be converted to snowslide electric signal；
For the snowslide extracted in the noise that exports the snowslide electric signal from the single photon signal detecting module (1)
Signal extraction module (2)；
With the avalanche signal processing module (3) for the snowslide electric signal to be converted into data signal；
It is characterized in that：
The single photon signal detecting module (1) includes the avalanche photodide APD being operated under gating patterns；
The avalanche signal processing module (3) is limiting amplifier (8), and input and the snowslide of the limiting amplifier (8) are believed
The output end of number extraction module (2) is connected, and the bandwidth of operation of the limiting amplifier (8) is more than the band of the snowslide electric signal
It is wide；
The input signal threshold value of the limiting amplifier (8) is more than in avalanche signal extraction module (2) output signal
The amplitude of background noise；
The snowslide electric signal is converted into data signal output by the limiting amplifier (8).
2. the single-photon detector of a kind of low time jitter according to claim 1, it is characterised in that in the single photon
The avalanche photodide APD of signal detection module (1) two ends Opposite side loading DC voltage VA, the DC voltage VAIt is less than
The avalanche voltage V of the avalanche photodideB；Amplitude is VgGate-control signal the snowslide light is input to by capacitance C
The negative electrode of electric diode, the Vg、VAAnd VBMeet VA+Vg>VB, the anode of the avalanche photodide is single photon letter
The output end of number detecting module (1).
3. a kind of single-photon detector of low time jitter according to claim 2, it is characterised in that the gate-control signal
It is f for frequencygSinusoidal signal, the avalanche signal extraction module (2) is respectively f by centre frequencyg、2fg、3fgBand resistance filter
Ripple device (4), (5), (6) and low noise RF small signals amplifier (7) are serially connected composition.
4. a kind of single-photon detector of low time jitter according to claim 2, it is characterised in that the gate-control signal
For sinusoidal signal, the avalanche signal extraction module (2) includes low pass filter and the amplification of low noise RF small signals of series connection
Device, the cut-off frequency of the low pass filter is less than the frequency of the gate-control signal and more than the bandwidth of the snowslide electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710240460.5A CN107024289A (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of low time jitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710240460.5A CN107024289A (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of low time jitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107024289A true CN107024289A (en) | 2017-08-08 |
Family
ID=59526753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710240460.5A Pending CN107024289A (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of low time jitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107024289A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037391A (en) * | 2021-02-04 | 2021-06-25 | 中国人民解放军战略支援部队信息工程大学 | Optical communication receiving device and method based on gated avalanche photodiode |
| GB2622244A (en) * | 2022-09-08 | 2024-03-13 | Toshiba Kk | Photon detection system and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092896A1 (en) * | 2003-09-19 | 2005-05-05 | Moriyasu Ichino | Light-receiving method of an avalanche photodiode and a bias control circuit of the same |
| CN102155998A (en) * | 2011-04-01 | 2011-08-17 | 张军 | Fully-integrated high-speed single photon detecting system and detecting method |
| CN102230828A (en) * | 2011-04-07 | 2011-11-02 | 华东师范大学 | Method for detecting gigahertz single photon with low time jitter and low noise |
| WO2012132919A1 (en) * | 2011-03-30 | 2012-10-04 | 日本電気株式会社 | Photon detection circuit and photon detection method |
| US20140027607A1 (en) * | 2012-05-04 | 2014-01-30 | Princeton Lightwave, Inc. | High-Repetition-Rate Single-Photon Receiver and Method Therefor |
| CN204007882U (en) * | 2014-07-08 | 2014-12-10 | 山东大学 | A kind of single-photon detector avalanche signal extracts circuit |
| CN104468093A (en) * | 2013-09-18 | 2015-03-25 | 安徽量子通信技术有限公司 | Synchronous method of quantum key distribution system |
| CN106382993A (en) * | 2016-08-19 | 2017-02-08 | 浙江神州量子网络科技有限公司 | Optimal setting method for parameters of single-photon detector |
| CN206959996U (en) * | 2017-04-13 | 2018-02-02 | 华中师范大学 | A kind of single-photon detector of low time jitter |
-
2017
- 2017-04-13 CN CN201710240460.5A patent/CN107024289A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092896A1 (en) * | 2003-09-19 | 2005-05-05 | Moriyasu Ichino | Light-receiving method of an avalanche photodiode and a bias control circuit of the same |
| WO2012132919A1 (en) * | 2011-03-30 | 2012-10-04 | 日本電気株式会社 | Photon detection circuit and photon detection method |
| CN102155998A (en) * | 2011-04-01 | 2011-08-17 | 张军 | Fully-integrated high-speed single photon detecting system and detecting method |
| CN102230828A (en) * | 2011-04-07 | 2011-11-02 | 华东师范大学 | Method for detecting gigahertz single photon with low time jitter and low noise |
| US20140027607A1 (en) * | 2012-05-04 | 2014-01-30 | Princeton Lightwave, Inc. | High-Repetition-Rate Single-Photon Receiver and Method Therefor |
| CN104468093A (en) * | 2013-09-18 | 2015-03-25 | 安徽量子通信技术有限公司 | Synchronous method of quantum key distribution system |
| CN204007882U (en) * | 2014-07-08 | 2014-12-10 | 山东大学 | A kind of single-photon detector avalanche signal extracts circuit |
| CN106382993A (en) * | 2016-08-19 | 2017-02-08 | 浙江神州量子网络科技有限公司 | Optimal setting method for parameters of single-photon detector |
| CN206959996U (en) * | 2017-04-13 | 2018-02-02 | 华中师范大学 | A kind of single-photon detector of low time jitter |
Non-Patent Citations (1)
| Title |
|---|
| QING-LIN WU , NAOTO NAMEKATA, AND SHUICHIRO INOUE: "Sinusoidally Gated InGaAs Avalanche Photodiode with Direct Hold-Off Function for Efficient and Low-Noise Single-Photon Detection", APPLIED PHYSICS EXPRESS, pages 1 - 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037391A (en) * | 2021-02-04 | 2021-06-25 | 中国人民解放军战略支援部队信息工程大学 | Optical communication receiving device and method based on gated avalanche photodiode |
| GB2622244A (en) * | 2022-09-08 | 2024-03-13 | Toshiba Kk | Photon detection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206959996U (en) | A kind of single-photon detector of low time jitter | |
| CN103148950B (en) | Integrated gating active quenching/restoring circuit | |
| CN107271058B (en) | High-speed self-feedback single photon detection quenching control circuit and control method | |
| CN104075802A (en) | Large-dynamic-range photon counting weak light signal measuring device and method | |
| KR101685494B1 (en) | Apparatus for Detecting Single Photon and Method for the same | |
| CN104296866A (en) | Interface circuit applied to avalanche photodiode working in linear mode | |
| CN108168717A (en) | Number of photons differentiates balanced detector | |
| CN102998008A (en) | Symmetrical double-avalanche-photo-diode (APD) balanced near-infrared photon detector | |
| CN104990632A (en) | Gate control difference single-photon detection system | |
| CN107024289A (en) | A kind of single-photon detector of low time jitter | |
| CN104697646B (en) | A kind of single photon counting discriminator circuit with dark counting pulse discrimination power | |
| CN206804152U (en) | A kind of single-photon detector of frequency-tunable | |
| CN202974453U (en) | Bipolar-bias-voltage single photon detection device | |
| CN108871308A (en) | A kind of optical fibre gyro pre-amplification circuit based on switched-capacitor integrator | |
| CN107036722A (en) | The high-speed low-noise single-photon detection system of ultrashort pulse gate | |
| CN204535861U (en) | A kind of single photon counting discriminator circuit with dark counting pulse ability to see things in their true light | |
| CN203011544U (en) | An apd single-photon detector | |
| CN102980669B (en) | Bipolar self-balancing avalanche photo diode (APD) single photon detection system | |
| CN104677511B (en) | A kind of single photon counting discriminator circuit with threshold values automatic control function | |
| CN102998007B (en) | Bipolar bias avalanche photo diode (APD) single photon detection system | |
| KR102368114B1 (en) | Avalanche Photodiode that can Operate as One of Single Photon Detection Devices Operating in Two Different Modes | |
| CN107462896A (en) | A kind of pulse laser laterally captures and measuring system and method | |
| CN207380240U (en) | A kind of pulse laser laterally captures and measuring device | |
| CN207556802U (en) | Laser optical detection circuit | |
| Chen et al. | Photon-number resolving performance of the InGaAs/InP avalanche photodiode with short gates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |