CN206804152U - A kind of single-photon detector of frequency-tunable - Google Patents
A kind of single-photon detector of frequency-tunable Download PDFInfo
- Publication number
- CN206804152U CN206804152U CN201720386932.3U CN201720386932U CN206804152U CN 206804152 U CN206804152 U CN 206804152U CN 201720386932 U CN201720386932 U CN 201720386932U CN 206804152 U CN206804152 U CN 206804152U
- Authority
- CN
- China
- Prior art keywords
- avalanche
- signal
- frequency
- pass filter
- low pass
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of single-photon detector of frequency-tunable, including single photon signal detecting module, avalanche signal extraction module and avalanche signal processing module, single photon signal detecting module include avalanche photodide, the both ends Opposite side loading DC voltage V of avalanche photodideA, DC voltage VALess than the avalanche voltage V of the avalanche photodideB, amplitude VgSinusoidal gate-control signal the negative electrode of the avalanche photodide, V are input to by capacitance Cg、VAAnd VBMeet VA+Vg>VB, the anode of avalanche photodide is the output end of single photon signal detecting module；Avalanche signal extraction module is low pass filter, the output end of single photon signal detecting module is connected with the input of low pass filter, the output end of low pass filter accesses the input of the avalanche signal processing module, the present apparatus is simple in construction, flexibility is good, and working frequency has good adaptability.
Description
Technical field
It the utility model is related to the necks such as the detection of faint near infrared light and the Quantum Secure Communication in fiber optic communication field
Domain, in particular to a kind of single-photon detector of frequency-tunable.
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 single-photon detectors the most practical.
When APD is used for single photon detection, Geiger mode angular position digitizer must be worked in, i.e. APD reverse bias voltage is more than its snowslide electricity
Pressure.Under Geiger mode angular position digitizer, caused carrier can trigger so-called " self-holding snowslide " process, photoelectric current after APD absorbs single photon
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
Quenching avalanche process 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 detect speed
Rate 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 reach, just APD bias voltage is set to be more than snowslide electricity by a gating pulse
Pressure, avalanche process are 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.
But under gating patterns, due to the presence of APD junction capacity, when gating pulse passes through APD, the rising edge of pulse and
Trailing edge can produce the larger needle pattern noise of amplitude, be superimposed upon the output end of detector, and snowslide caused by single photon is electric
Signal amplitude is relatively small.Therefore, to working in the APD of gating patterns, noise how is effectively suppressed to extract faint snow
Collapsing signal just turns into the key for improving detector performance.The method for suppressing needle pattern noise at present mainly has autodyne point-score, sine
Ripple filter method etc..The method of self difference goes out two paths of one delay cycle of difference using the delay line configuration of different length,
By APD output signals respectively by difference cancellation after two paths, spike noise is removed so as to extract avalanche signal；Sine wave is filtered
The method of ripple then by the use of sinusoidal signal as gate-control signal, only occurs by spike noise spectrum component caused by APD junction capacity
At door frequency and its integral multiple, thus introduce several bandstop filters can filter out corresponding to sinusoidal signal frequency and its
2nd, third harmonic frequencies, so as to extract avalanche signal.These methods can suppress spike noise under certain condition, but
In place of Shortcomings：The delay line length of autodyne point-score is with the bandstop filter centre frequency of sine wave filter method by gate arteries and veins
The working frequency of punching determines that, once detector design is completed, its working frequency is fixed, very flexible.
The content of the invention
The purpose of this utility model is intended to the deficiency for solving above-mentioned background technology, there is provided a kind of simple in construction, flexible
The single-photon detector of good, gating pulse frequency continuously adjustabe the frequency-tunable of property.
The technical solution of the utility model is：A kind of single-photon detector of frequency-tunable, including single photon signal are visited
Survey module 1, avalanche signal extraction module 2 and avalanche signal processing module 3, it is characterised in that the single photon signal detects mould
Block 1 includes avalanche photodide APD, the both ends Opposite side loading DC voltage V of the avalanche photodideA, the direct current
Voltage VALess than the avalanche voltage V of the avalanche photodideB；The negative electrode of the avalanche photodide passes through capacitance C
It is connected with gate-control signal input 1.2, the input range of gate-control signal input 1.2 is VgSinusoidal gate-control signal, it is described
Vg、VAAnd VBMeet VA+Vg>VB；The anode of the avalanche photodide is the output of the single photon signal detecting module 1
End；The avalanche signal extraction module 2 is low pass filter, and the input of the low pass filter is visited with the single photon signal
The output end for surveying module 1 is connected, and the output end of the low pass filter accesses the input of the avalanche signal processing module 3.
Preferably, the avalanche signal processing module 3 may include the radio frequency amplifier and high-speed comparator being sequentially connected in series.
Preferably, the frequency of the sinusoidal gate-control signal can be continuous in the range of the cut-off frequency more than low pass filter
It is adjustable.
Preferably, the signal that the single photon signal detecting module 1 exports includes snowslide electric signal, the LPF
The cut-off frequency of device is more than the bandwidth of the snowslide electric signal.
Operation principle of the present utility model：The utility model is using the pole of avalanche optoelectronic two being operated under sinusoidal gating patterns
Single photon signal is converted to snowslide electric signal output to avalanche signal extraction module 2, the avalanche photodide by pipe APD
Gated noise is also included in the signal of APD outputs, and the avalanche signal extraction module 2 is by the snowslide electric signal from gated noise
In extract after export to avalanche signal processing module 3, the avalanche signal extraction module 2 replaces passing using low pass filter
The bandstop filter of multiple cascades of system, realize the frequency continuously adjustabe of sinusoidal gate-control signal, the last avalanche signal processing
The snowslide electric signal of input is converted into data signal output by module 3.
The utility model has the advantage of,
(1) the utility model suppresses incremental noise using low pass filter, and the cut-off frequency of low pass filter is less than sine
The working frequency of gate-control signal, therefore the frequency of sinusoidal gate-control signal is not limited, can be more than LPF Cutoff
Continuously adjusted in the range of frequency, frequency-tuning range is considerably beyond existing similar single-photon detector so that single photon detection
The working frequency of device has good adaptability.
(2) cut-off frequency of low pass filter is more than the bandwidth of the snowslide electric signal, therefore straight using low pass filter
Extraction snowslide electric signal is connect, can intactly keep the waveform and amplitude of avalanche signal, the signal to noise ratio of detector improves, Jin Erti
Rise the detection efficient of single-photon detector.
(3) the utility model device is simple, suitable for various APD, has high detection rate, high detection efficient, low dark count
Digit rate and low cost, it is compact-sized the advantages that, be the ideal scheme for realizing high-speed single photon detection.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment；
Fig. 2 is the output signal schematic diagram of the single photon signal detecting module 1 of the utility model embodiment.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The single-photon detector of frequency-tunable shown in Fig. 1, including single photon signal detecting module 1, avalanche signal carries
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 both ends of avalanche photodide, the DC voltage VALess than the avalanche voltage V of the avalanche photodideB；Amplitude is
VgSinusoidal gate-control signal the moon of the avalanche photodide is input to by capacitance C from gate-control signal input 1.2
Pole, the Vg、VAAnd VBMeet VA+Vg>VB；Using pulsed light caused by laser through overdamping as single-photon source, by single photon
Source is coupled to the avalanche photodide APD with tail optical fiber.The anode of the avalanche photodide is visited for the single photon signal
Survey the output end of module 1.
Avalanche photodide APD is operated under sinusoidal gating patterns described in the present embodiment, due to depositing for APD junction capacity
The output signal-to-noise ratio of single photon signal detecting module 1, interference snowslide electricity can be seriously affected in noise caused by the coupling of, junction capacity
The correct extraction of signal.When driving avalanche photodide APD using sinusoidal gate-control signal, junction capacity coupled noise is mainly distributed
With on fundamental frequency and higher harmonic components of the sinusoidal gate-control signal with frequency.Therefore in the present embodiment, the single photon signal detection
The signal that module 1 exports is made up of snowslide electric signal and sinusoidal gated noise Signal averaging, as shown in Fig. 2 wherein sinusoidal gate
Noise signal is very strong, and snowslide electrical signal intensity is very weak, and the faint snowslide electric signal appears in sinusoidal gated noise signal
At zero crossing.
The avalanche signal extraction module 2 is low pass filter, the output end of the single photon signal detecting module 1 and institute
The input for stating low pass filter is connected, and the output end of the low pass filter accesses the defeated of the avalanche signal processing module 3
Enter end.The frequency of the sinusoidal gate-control signal of single photon signal detecting module described in the present embodiment 1 is more than low pass filter
Continuously adjustabe in the range of cut-off frequency, and the cut-off frequency of the low pass filter is more than the single photon signal detecting module
The bandwidth of the snowslide electric signal of 1 output.The avalanche signal extraction module 2 can directly filter out sinusoidal gate using low pass filter
Noise is so as to extracting snowslide electric signal.
The avalanche signal processing module 3 includes the radio frequency amplifier and high-speed comparator being sequentially connected in series, and the radio frequency is put
The faint snowslide electric signal extracted is amplified and is sent into the high-speed comparator by big device, and the high-speed comparator will
Analog signal snowslide electric signal is converted into data signal output.
In the present embodiment, the avalanche photodide in photon signal detection module 1, which uses, is operated near infrared band
InGaAs/InP APD, model PGA-300；Low pass filter in avalanche signal extraction module 2 uses VLFX-850；Snowslide
Radio frequency amplifier in signal processing module 3 uses AA320-0S RF small signals amplifiers, and high-speed comparator uses
ADCMP565.The utility model is not limited to above-mentioned embodiment, in those of ordinary skill in the art's possessed knowledge
It is interior, it can also be made a variety of changes on the premise of the utility model aims are not departed from.
Claims (4)
1. a kind of single-photon detector of frequency-tunable, including single photon signal detecting module (1), avalanche signal extraction module
(2) and avalanche signal processing module (3), it is characterised in that the single photon signal detecting module (1) includes the pole of avalanche optoelectronic two
Manage (APD), the both ends Opposite side loading DC voltage V of the avalanche photodideA, the DC voltage VALess than the snowslide
The avalanche voltage V of photodiodeB；The negative electrode of the avalanche photodide passes through capacitance C and gate-control signal input
(1.2) it is connected, gate-control signal input (1.2) input range is VgSinusoidal gate-control signal, the Vg、VAAnd VBMeet VA
+Vg>VB；The anode of the avalanche photodide is the output end of the single photon signal detecting module (1)；The snowslide letter
Number extraction module (2) is low pass filter, the input of the low pass filter and the single photon signal detecting module (1)
Output end is connected, and the output end of the low pass filter accesses the input of the avalanche signal processing module (3).
A kind of 2. single-photon detector of frequency-tunable according to claim 1, it is characterised in that the avalanche signal
Processing module (3) includes the radio frequency amplifier and high-speed comparator being sequentially connected in series.
A kind of 3. single-photon detector of frequency-tunable according to claim 1, it is characterised in that the sinusoidal gate
The frequency of signal continuously adjustabe in the range of the cut-off frequency more than low pass filter.
A kind of 4. single-photon detector of frequency-tunable according to claim 1, it is characterised in that the single photon letter
The signal of number detecting module (1) output includes snowslide electric signal, and the cut-off frequency of the low pass filter is more than the snowslide
The bandwidth of electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720386932.3U CN206804152U (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of frequency-tunable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720386932.3U CN206804152U (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of frequency-tunable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206804152U true CN206804152U (en) | 2017-12-26 |
Family
ID=60732889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720386932.3U Active CN206804152U (en) | 2017-04-13 | 2017-04-13 | A kind of single-photon detector of frequency-tunable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206804152U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540303A (en) * | 2018-11-09 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of two dimension ultraviolet photon counting imaging detector |
| CN111678593A (en) * | 2020-05-21 | 2020-09-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Photon counting device and photon counting method |
| CN116045952A (en) * | 2023-03-31 | 2023-05-02 | 中国船舶集团有限公司第七〇七研究所 | Polarization maintaining fiber-optic gyroscope and peak removing method thereof |
-
2017
- 2017-04-13 CN CN201720386932.3U patent/CN206804152U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540303A (en) * | 2018-11-09 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of two dimension ultraviolet photon counting imaging detector |
| CN111678593A (en) * | 2020-05-21 | 2020-09-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Photon counting device and photon counting method |
| CN111678593B (en) * | 2020-05-21 | 2023-02-28 | 中国科学院苏州纳米技术与纳米仿生研究所 | Photon counting device and photon counting method |
| CN116045952A (en) * | 2023-03-31 | 2023-05-02 | 中国船舶集团有限公司第七〇七研究所 | Polarization maintaining fiber-optic gyroscope and peak removing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206804152U (en) | A kind of single-photon detector of frequency-tunable | |
| CN102735351B (en) | Single-photon detector circuit and detection method thereof | |
| CN206959996U (en) | A kind of single-photon detector of low time jitter | |
| CN204575534U (en) | A kind of laser interferometer photoelectric detective circuit | |
| CN107014495A (en) | The high-speed low-noise single-photon detector of ultrashort pulse gate | |
| CN107271055B (en) | Infrared single photon detection system of parallel avalanche photodiode array structure | |
| CN104075802A (en) | Large-dynamic-range photon counting weak light signal measuring device and method | |
| CN102230828B (en) | Method for detecting gigahertz single photon with low time jitter and low noise | |
| CN107036722A (en) | The high-speed low-noise single-photon detection system of ultrashort pulse gate | |
| CN108168717A (en) | Number of photons differentiates balanced detector | |
| CN102252670A (en) | Digital closed loop-based optic fiber gyroscope output signal detecting device and method | |
| CN103411691B (en) | A kind of sinusoidal gate near-infrared single photon detector of GHz of frequency-tunable | |
| CN102980669B (en) | Bipolar self-balancing avalanche photo diode (APD) single photon detection system | |
| CN203011544U (en) | An apd single-photon detector | |
| CN203933547U (en) | A kind of micro-amplification circuit of electrical signal for handheld device | |
| CN107024289A (en) | A kind of single-photon detector of low time jitter | |
| CN102998007A (en) | Bipolar bias avalanche photo diode (APD) single photon detection system | |
| CN103954831A (en) | Average power measuring circuit and method for weak continuous wave signals | |
| CN106768320A (en) | Significantly gate single-photon detection system at a high speed | |
| CN113405677A (en) | High-speed sine gate control single photon detector | |
| CN102980670A (en) | Cascaded noise suppression device for single-photon detection | |
| CN107843350A (en) | Frequency-adjustable high-speed near-infrared single photon detector based on sampling | |
| CN204206117U (en) | A kind of amplifier of creatures' physical electric signals circuit of fast detector | |
| CN204116404U (en) | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector | |
| CN214893711U (en) | High-speed sine gate control single photon detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |