CN205787512U - A kind of optical communicating waveband generation device for continuous variable quantum entanglement source - Google Patents
A kind of optical communicating waveband generation device for continuous variable quantum entanglement source Download PDFInfo
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Abstract
This utility model provides a kind of optical communicating waveband generation device for continuous variable quantum entanglement source, is made up of the continuous single frequency optical fiber laser of optical communicating waveband, doubler, flashlight pattern cleaner, pump light pattern cleaner, dichroic mirror, the fully-reflected plane mirror of band piezoelectric ceramics, three resonance unsupervised clustering algorithm, crystal temperature effect controller, chamber length and phase locking system, the one 45 ° of high antiplane mirror and quantum entanglement source detecting system.This utility model provides the generation device for continuous variable quantum entanglement source that a kind of compact conformation, good stability match with optical communicating waveband, this device uses single three resonance unsupervised clustering algorithm directly to prepare optical communicating waveband continuous variable quantum entangled source, this wave band quantum tangles source loss in a fiber and is only 0.2 dB/km, it is possible not only to realize the high-fidelity transfer of information, and compatible with existing optical communication system, become the perfect light source of practical quantum network.
Description
Technical field
This utility model relates to continuous variable quantum optices and quantum information field, specifically a kind of optical communicating waveband generation device for continuous variable quantum entanglement source.
Background technology
Show non-localized relatedness between the subsystem being unique in that a system of quantum entangled source, the observation of a subsystem be would necessarily affect the measurement result of other subsystems.Unconditionality, the high efficiency of detection that continuous variable quantum entangled source is prepared due to it and receive significant attention, have been used for quantum number defect, quantum dense coding and quantum secret communication etc. are studied.Optical communicating waveband 1.5 μm continuous variable quantum entangled source also becomes the valuable source of practical continuous variable quantum information science research.For practical quantum information network, information needs to transmit between different nodes, and light field can realize the high-fidelity transfer to information as preferable carrier.Optical communicating waveband quantum entangled source is only 0.2dB/km due to loss in a fiber, is possible not only to realize the high-fidelity transfer of information, and compatible with existing optical communication system, becomes the perfect light source of practical quantum network.And in practical quantum secret communication, utilize optical communicating waveband quantum entangled source can significantly improve its quantum channel to additional noise tolerance as light source, thus improve safe key speed, increase transmission range.
Optical parameter amplifies or optical parametric oscillator process is to produce the effective ways of continuous variable quantum entangled source at present.Document " Stable control of 10 dB
Two-mode squeezed vacuum states of light, Opt. Expres. 21,11546 (2013) " report utilize two degeneracys doubly resonant optical parametric oscillator based on periodical poled crystal output two single-mode squeezing states, by two single-mode squeezing states 50/50 beam splitter coupling create optical communicating waveband 1.5 μm continuous variable quantum entangled source.But, above-mentioned article uses double resonance Degenerate Optical Parametric Oscillator, and it is low that pump light passes its inner chamber power density of optical parametric oscillator double times, and the threshold value causing optical parametric oscillator is the highest.Secondly, above-mentioned article is that the compressed state optical field coupling using two optical parametric oscillator outputs produces quantum entangled source, and system is more complicated, and needs position phase and the Chang You many places, chamber of locking, causes the less stable that system is overall, limits its actual application.
Summary of the invention
The purpose of this utility model is the generation device for continuous variable quantum entanglement source providing a kind of compact conformation, good stability and optical communicating waveband to match, this device and method uses single three resonance unsupervised clustering algorithm can prepare optical communicating waveband continuous variable quantum entangled source, and the measurement to this quantum entangled source need not background oscillator signal.
A kind of optical communicating waveband generation device for continuous variable quantum entanglement source described in the utility model adopts the following technical scheme that realization: a kind of optical communicating waveband generation device for continuous variable quantum entanglement source, including a continuous single frequency optical fiber laser of optical communicating waveband, an emitting light path of the continuous single frequency optical fiber laser of described optical communicating waveband is sequentially provided with flashlight pattern cleaner, dichroic mirror and three resonance unsupervised clustering algorithm；Another emitting light path of the continuous single frequency optical fiber laser of described optical communicating waveband is provided with doubler, and the emitting light path of doubler is sequentially provided with pump light pattern cleaner and the fully-reflected plane mirror of band piezoelectric ceramics；Described three resonance unsupervised clustering algorithm are positioned on the transmitted light path of dichroic mirror；The position relationship of dichroic mirror and fully-reflected plane mirror ensure that the light by the outgoing of doubler after fully-reflected plane mirror and dichroic mirror reflect with the transmitted light path conllinear of dichroic mirror；Described three resonance unsupervised clustering algorithm include two mirror optical resonators, be positioned at two mirror optical resonance intracavity temperature and the temperature control furnace of angle and the nonlinear crystal that be placed in temperature control furnace can be fine-tuned；Described nonlinear crystal is II class Temperature Matching periodical poled crystal；Also include the reflection angle for controlling fully-reflected plane mirror and the chamber length of two mirror optical resonator chamber length and phase locking system；The emitting light path of three resonance unsupervised clustering algorithm is provided with quantum entanglement source detecting system.
Temperature and angle by regulation crystal realize pump light in optical parametric amplifier, Injection Signal light (o light and e light) three mode resonance.
Described chamber length and phase locking system include the first photodetector, phase modulator, isolator, the second photodetector, frequency mixer, signal generator, low pass filter, lock-in amplifier, proportional plus integral plus derivative controller and high-voltage amplifier；
Described phase modulator and isolator, sequentially between flashlight pattern cleaner and dichroic mirror, are extracted the branch road of the feedback signal carrying three resonance unsupervised clustering algorithm resonator cavitys by isolator, and described first photodetector is positioned on this branch road；The signal output part of the first photodetector is connected with frequency mixer signal input part, and the signal output part of signal generator is connected with the signal input part of phase modulator and another signal input part of frequency mixer respectively；The signal output part of frequency mixer is connected with a signal input part of proportional plus integral plus derivative controller by low pass filter；
The emitting light path of three resonance unsupervised clustering algorithm is provided with the one 45 ° of high antiplane mirror, and quantum entanglement source detecting system is positioned on the reflected light path of the one 45 ° of high antiplane mirror；Described second photodetector is positioned on the transmitted light path of the one 45 ° of high antiplane mirror；The signal output part of the second photodetector is connected with the signal input part of lock-in amplifier, the signal output part of lock-in amplifier is connected with another signal input part of proportional plus integral plus derivative controller, the signal output part of proportional plus integral plus derivative controller is connected with the signal input part of high-voltage amplifier, and piezoelectric ceramics that two signal output parts of high-voltage amplifier are joined with fully-reflected plane mirror respectively and the piezoelectric ceramics that two mirror optical resonators are mated are connected.
Further, described flashlight pattern cleaner and pump light pattern cleaner are constituted by the concave mirror that two 45 ° high antiplane mirrors and radius of curvature are 1m, form three mirror annular passive resonant cavities, a length of 1.03m in chamber, and resonator cavity fineness is 500.
The laser filtered is coupled into resonator cavity through first 45 ° high antiplane mirror, close be incorporated in intracavity resonance respectively through second 45 ° high antiplane mirror, concave mirror and first 45 ° high antiplane mirrors formation light path, export through second 45 ° high antiplane mirror again, it is achieved the Injection Signal light of the unsupervised clustering algorithm that resonate to three and pump light spatial model and the filtration of additional noise.
Described chamber length and phase locking system are for realizing three resonance unsupervised clustering algorithm resonator length, Injection Signal light and the locking of pump light phase para-position phase.
Further, optical communicating waveband continuous single frequency optical fiber laser shoot laser centre wavelength is 1.5 μm, and described doubler is made up of two mirror optical resonators and I class Temperature Matching periodical poled crystal, and the laser center wavelength of doubler outgoing is 775nm.
Described a kind of optical communicating waveband generation device for continuous variable quantum entanglement source work process is as follows: a kind of optical communicating waveband continuous variable quantum entanglement source generating method, comprise the steps: that the continuous single frequency optical fiber laser of (a) optical communicating waveband is as LASER Light Source, a laser part for output is for pumping doubler, it is thus achieved that the continuous single-frequency laser after frequency multiplication；Another part laser passes through flashlight pattern cleaner, filters the spatial model of laser, reduces its additional noise；The continuous single-frequency laser of doubler outgoing passes through pump light pattern cleaner, filters the spatial model of laser, reduces its additional noise；B () above-mentioned two bundle laser, by after dichroic mirror, all inject three resonance unsupervised clustering algorithm, respectively as Injection Signal light field and the pumping light field of three resonance unsupervised clustering algorithm；Fully-reflected plane mirror is for controlling the phase para-position phase of Injection Signal light field and pump light；Injection Signal light incides three resonance unsupervised clustering algorithm with 45 ° of polarization directions, and this light beam resolves into two-beam o light and the e light of the identical polarized orthogonal of frequency after entering II class Temperature Matching periodical poled crystal；The temperature accurately controlling nonlinear crystal reaches optimum temperature matching condition, and now o light and e light resonate at three resonance unsupervised clustering algorithm intracavity simultaneously；By the anglec of rotation of nonlinear crystal is fine-tuned, change the nonlinear crystal effective optical length at three resonance unsupervised clustering algorithm intracavity, thus compensate dispersion, pump light is resonated at three resonance unsupervised clustering algorithm intracavity with above-mentioned two-beam simultaneously, (now the power density of three resonance unsupervised clustering algorithm intracavity pump light is the highest to realize three resonance conditions, the threshold value of effective relatively low optical parametric oscillator, obtains high Classical Gain simultaneously)；C the chamber length of three resonance unsupervised clustering algorithm is locked on the resonant frequency of Injection Signal light beam by () by chamber length and phase locking system, the relative phase of Injection Signal light and pump light is locked in π, now three resonance unsupervised clustering algorithm run on anti-magnifying state, and output has amplitude anticorrelation, the Quantum Entangled States light field of position phase positive association；D Quantum Entangled States light field that () exports enters quantum entanglement source detecting system, uses the quantum entanglement degree of Bel's state direct detection systematic survey output light field.
Generation device for continuous variable quantum entanglement source and method that compared with prior art a kind of optical communicating waveband of this utility model design matches have the following advantages:
The optical communicating waveband 1.5 μm generation device for continuous variable quantum entanglement source of this utility model design, it is only 0.2dB/km owing to this wave band quantum tangles source loss in a fiber, it is possible not only to realize the high-fidelity transfer of information, and compatible with existing optical communication system, become the perfect light source of practical quantum network.
This utility model uses high accuracy narrow bandwidth optical mode cleaner that the noise of 1.5 μm and 775nm LASER Light Source is reduced to shot noise limit, existing 1.5 μm LASER Light Source noises are the most all far above shot noise limit, and this is the main cause that 1.5 μm quantum entangled sources prepare slower development.The method effectively reduces the additional noise of LASER Light Source, improves the degree of entanglement of 1.5 μm quantum entangled sources.
This utility model devises single three resonance unsupervised clustering algorithm and produces the simple mechanism of quantum entangled source, i.e. can realize the three mode resonance in optical parameter enlarged cavity by the temperature and angle controlling II class Temperature Matching PPKTP crystal.When optical parametric amplifier runs on anti-magnifying state, the two-beam wavelength of optical parametric amplifier output is 1.5 mu m polarized orthogonals, is orthogonal amplitude anticorrelation, the bright entangled light of orthogonal position phase positive association.Under identical pump power, three resonant conditions that pump light also resonates more easily reach threshold value, it is thus achieved that higher Classical Gain.
In a word, a kind of optical communicating waveband generation device for continuous variable quantum entanglement source of this utility model design has the advantages such as simple in construction, system stability and existing optical communication system are compatible, has important using value in practical quantum information field.
Accompanying drawing explanation
Fig. 1 is the theory diagram of this utility model a kind of optical communicating waveband generation device for continuous variable quantum entanglement source, in figure: the continuous single frequency optical fiber laser of 1-optical communicating waveband, 2-doubler, 3-flashlight pattern cleaner, 4-pump light pattern cleaner, 5-dichroic mirror, 6-fully-reflected plane mirror, 7-tri-resonates unsupervised clustering algorithm, 8-crystal temperature effect controller, 9-chamber length and phase locking system, the one 45 ° of high antiplane mirror of 10-, 11-quantum entanglement source detecting system.
Fig. 2 is the structural representation of optical communicating waveband generation device for continuous variable quantum entanglement source described in the utility model, in figure: 90-the first photodetector, 91-phase modulator, 92-isolator, 93-the second photodetector, 94-frequency mixer, 95-signal generator, 96-low pass filter, 97-lock-in amplifier, 98-proportional plus integral plus derivative controller, 99-high-voltage amplifier.
Fig. 3 is the schematic diagram of three resonance unsupervised clustering algorithm of optical communicating waveband generation device for continuous variable quantum entanglement source described in the utility model, in figure: the 71-adjustable mirror holder of two dimension, 72-plano-concave mirror, 73-nonlinear crystal and temperature control furnace thereof, 74-horizontal translation frame, 75-vertical translation frame, 76-precision rotation adjusting bracket, 77-invar plate.
Fig. 4 is Injection Signal optical output power situation of change in three resonance unsupervised clustering algorithm.
Fig. 5 is the Quantum Correlation noise spectrum that this utility model a kind of optical communicating waveband generation device for continuous variable quantum entanglement source obtains 1.5 μm light field quadrature amplitude sums.
Fig. 6 is the Quantum Correlation noise spectrum that this utility model a kind of optical communicating waveband generation device for continuous variable quantum entanglement source obtains 1.5 μm light field orthogonal position phase component differences.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is made and further illustrating:
Fig. 1 is the theory diagram of this utility model a kind of optical communicating waveband generation device for continuous variable quantum entanglement source, using output wavelength is that the optical communicating waveband continuous single frequency optical fiber laser 1 of 1.5 μm is as LASER Light Source, a laser part for laser instrument output is for pumping doubler 2, it is thus achieved that the continuous single-frequency laser of 775nm；Another part laser passes through flashlight pattern cleaner 3, filters the spatial model of laser, reduces its additional noise.The continuous single-frequency laser of 775nm passes through pump light pattern cleaner 4, filters the spatial model of laser, reduces its additional noise.Wavelength is 1.5 μm and 775nm two restraints laser by after dichroic mirror 5, all injects three resonance unsupervised clustering algorithm 7, respectively as Injection Signal light field and the pumping light field of three resonance unsupervised clustering algorithm 7.Fully-reflected plane mirror 6 with piezoelectric ceramics is for controlling the phase para-position phase of Injection Signal light field and pump light.Injection Signal light incides three resonance unsupervised clustering algorithm with 45 ° of polarization directions, and light beam resolves into two-beam o light and the e light of the identical polarized orthogonal of frequency after entering II class Temperature Matching PPKTP crystal.The temperature accurately being controlled PPKTP crystal (II class Temperature Matching periodical poled crystal) by crystal temperature effect controller 8 reaches optimum temperature matching condition, and now o light and e light resonate at optical parametric amplifier intracavity simultaneously；By the anglec of rotation of crystal is fine-tuned, changes the crystal effective optical length at three resonance unsupervised clustering algorithm 7 intracavity, thus compensate dispersion so that pump light resonates at intracavity with above-mentioned two-beam, it is achieved three resonance conditions simultaneously.Now the power density of three resonance unsupervised clustering algorithm intracavity pump light is the highest, and the threshold value of effective relatively low optical parametric oscillator obtains high Classical Gain simultaneously.By chamber length and phase locking system 9, the chamber length of three resonance unsupervised clustering algorithm is locked on the resonant frequency of Injection Signal light beam, the relative phase of Injection Signal light and pump light is locked in π, now three resonance unsupervised clustering algorithm run on anti-magnifying state, and the light field of output has amplitude anticorrelation, the quantum entanglement characteristic of position phase positive association.The Quantum Entangled States light field of output is reflected into quantum entanglement source detecting system 11 through the one 45 ° of high antiplane mirror 10, use the quantum entanglement degree of Bel's state direct detection systematic survey output light field, need not introduce background oscillation light and balance homodyne detection system, thus avoid shake and the interference visibility impact on detection of background oscillation light.
The concrete light path of optical communicating waveband generation device for continuous variable quantum entanglement source is as in figure 2 it is shown, the continuous single frequency optical fiber laser of the optical communicating waveband of 1.5 μm 1 is the 1.5 continuous single frequency optical fiber lasers of μm that output is 2W that NP Photonics company produces.Doubler 2 be two radius of curvature be that the two mirror standing-wave cavities that the plano-concave mirror of 30 mm is constituted mates periodically poled lithium niobate crystal and form with I class, shg efficiency reaches 86%, and exporting frequency doubled light wavelength is 775nm.Owing to laser and the frequency doubled light of optical fiber laser output exist the additional noise far above shot noise limit tens dB, flashlight pattern cleaner 3 and pump light pattern cleaner 4 need to be used to filter its additional noise, pattern cleaner is the three mirror annular passive resonant cavities of a length of 1.03m in chamber, and resonator cavity fineness is 500.Filtered signal light and pump light all just reach shot noise limit at analysis frequency 4MHz.Wherein the light field inciding three resonance unsupervised clustering algorithm 7 intracavity is modulated by Injection Signal light through phase modulator 91, made by isolator 92 that light path is unidirectional to be passed through, and extract the reflection light carrying resonator cavity signal, the first photodetector 90 detect this reflection light and be converted to the signal of telecommunication；This signal is mixed by frequency mixer 94 with the modulated signal of signal generator 95, after low pass filter 96 filtering, produces error signal；Error signal inputs multichannel proportional plus integral plus derivative controller 98, error signal is carried on the piezoelectric ceramics of three resonance unsupervised clustering algorithm chamber mirrors by twin-channel high-voltage amplifier 99, thus realizes the locking of optical parametric amplifier chamber length.Three resonance unsupervised clustering algorithm 7 output light fields are through the one 45 ° of high antiplane mirror 10, and the output light field power of about 1%, through the one 45 ° of high antiplane mirror 10 transmission, is detected this transmission light by the second photodetector 93 equally and is converted to the signal of telecommunication；This signal and the modulated signal mixing demodulation output error signal within lock-in amplifier 97, error signal inputs multichannel proportional plus integral plus derivative controller 98, by twin-channel high-voltage amplifier 99, error signal is carried on the piezoelectric ceramics of fully-reflected plane mirror 6, it is achieved Injection Signal light and the locking of pump light relative phase.Three resonance unsupervised clustering algorithm 7 output light fields are reflected into quantum entanglement source detecting system 11 through the one 45 ° of high antiplane mirror 10 and detect, process is as follows: the light field of output is due to polarized orthogonal, separated through polarization beam splitter prism, light beam add position phase control and by two light relative to phase locking after pi/2, synthesize through a polarization beam splitter prism again, 50/50 beam splitter that a set of half-wave plate and polarization beam splitter prism form is interfered, visibility reaches 99%, export two light beams to be detected by the photodetector of low noise high-gain, the AC signal of detector is through adder-subtractor input spectrum analyser, electric current and fluctuating are Quantum Entangled States optical field amplitude and correlated noise, difference between current rises and falls as Quantum Entangled States phase of the field difference correlated noise.Shot noise limit is given by the coherent light consistent with bright entangled power of output during only Injection Signal light situation.
The schematic diagram of three resonance unsupervised clustering algorithm 7, as it is shown on figure 3, two plano-concave mirrors 72 are both placed on two-dimentional adjustable mirror holder 71 realizing two-dimensional adjustment, constitutes resonator cavity.Nonlinear crystal is placed in the temperature control furnace of poly-phenol material making of insulation, crystal temperature effect controller 8 realize accurate temperature controlling；Horizontal translation frame 74 and vertical translation frame 75 realize the accurate regulation of crystal horizontal and vertical directions, and precision rotation adjusting bracket 76 realizes the fine adjustment of crystal angle.Whole device is fixed on the invar plate 77 that thickness is 30mm, improves the stability of system.
Fig. 4 is the change curve of the three resonance unsupervised clustering algorithm Injection Signal optical output powers that laboratory observation arrives.Can be seen that when injecting without pump light, Injection Signal optical output power does not changes when scanning Injection Signal light and pump light relative phase changes between 0 ~ π；When there being pump light, Injection Signal optical output power alternate between maximum and minimum, the most now three resonance unsupervised clustering algorithm have realized three mode resonance, and run on amplification and anti-amplification state alternately, and Classical Gain is about 40 times.
Fig. 5 is the noise power spectrum of the optical parametric amplifier output light field orthogonal amplitude sum that experiment is measured.Being at 7MHz analyzing frequency, the degree of association of light field orthogonal amplitude sum is less than shot noise limit 5.2dB, and now Electronics noice is less than shot noise limit 12dB, negligible.
Fig. 6 is the noise power spectrum of the orthogonal phase difference of optical parametric amplifier output light field that experiment is measured.Being at 7MHz analyzing frequency, the degree of association of the orthogonal phase difference of light field is less than shot noise limit 5.2dB, and now Electronics noice is less than shot noise limit 12dB, negligible.
Claims (6)
1. an optical communicating waveband generation device for continuous variable quantum entanglement source, including the continuous single frequency optical fiber laser of an optical communicating waveband (1), it is characterized in that, an emitting light path of the continuous single frequency optical fiber laser of described optical communicating waveband (1) is sequentially provided with flashlight pattern cleaner (3), dichroic mirror (5) and three resonance unsupervised clustering algorithm (7)；Another emitting light path of the continuous single frequency optical fiber laser of described optical communicating waveband (1) is provided with doubler (2), and the emitting light path of doubler (2) is sequentially provided with the fully-reflected plane mirror (6) of pump light pattern cleaner (4) and band piezoelectric ceramics；Described three resonance unsupervised clustering algorithm (7) are positioned on the transmitted light path of dichroic mirror (5)；The position relationship of dichroic mirror (5) and fully-reflected plane mirror (6) ensure that the light by doubler (2) outgoing after fully-reflected plane mirror (6) and dichroic mirror (5) reflection with the transmitted light path conllinear of dichroic mirror (5)；Described three resonance unsupervised clustering algorithm (7) include two mirror optical resonators, be positioned at two mirror optical resonance intracavity temperature and the temperature control furnace of angle and the nonlinear crystal that be placed in temperature control furnace can be fine-tuned；Described nonlinear crystal is II class Temperature Matching periodical poled crystal；Also include the reflection angle for controlling fully-reflected plane mirror (6) and the chamber length of two mirror optical resonator chamber length and phase locking system (9)；The emitting light path of three resonance unsupervised clustering algorithm (7) is provided with quantum entanglement source detecting system (11).
2. a kind of optical communicating waveband generation device for continuous variable quantum entanglement source as claimed in claim 1, it is characterized in that, described chamber length and phase locking system (9) include the first photodetector (90), phase modulator (91), isolator (92), the second photodetector (93), frequency mixer (94), signal generator (95), low pass filter (96), lock-in amplifier (97), proportional plus integral plus derivative controller (98) and high-voltage amplifier (99)；
Described phase modulator (91) and isolator (92) are sequentially positioned between flashlight pattern cleaner (3) and dichroic mirror (5), extracted the branch road of the feedback signal carrying three resonance unsupervised clustering algorithm resonator cavitys by isolator (92), described first photodetector (90) is positioned on this branch road；The signal output part of the first photodetector (90) is connected with a signal input part of frequency mixer (94), and the signal output part of signal generator (95) is connected with the signal input part of phase modulator (91) and another signal input part of frequency mixer (94) respectively；The signal output part of frequency mixer (94) is connected with a signal input part of proportional plus integral plus derivative controller (98) by low pass filter (96)；
The emitting light path of three resonance unsupervised clustering algorithm (7) is provided with the one 45 ° high antiplane mirror (10), and quantum entanglement source detecting system (11) is positioned on the reflected light path of the one 45 ° high antiplane mirror (10)；Described second photodetector (93) is positioned on the transmitted light path of the one 45 ° high antiplane mirror (10)；The signal output part of the second photodetector (93) is connected with the signal input part of lock-in amplifier (97), the signal output part of lock-in amplifier (97) is connected with another signal input part of proportional plus integral plus derivative controller (98), the signal output part of proportional plus integral plus derivative controller (98) is connected with the signal input part of high-voltage amplifier (99), and piezoelectric ceramics that two signal output parts of high-voltage amplifier (99) are joined with fully-reflected plane mirror (6) respectively and the piezoelectric ceramics that two mirror optical resonators are mated are connected.
3. a kind of optical communicating waveband generation device for continuous variable quantum entanglement source as claimed in claim 2, it is characterized in that, described flashlight pattern cleaner (3) and pump light pattern cleaner (4) are constituted by the concave mirror that two 45 ° high antiplane mirrors and radius of curvature are 1m, form three mirror annular passive resonant cavities, the a length of 1.03m in chamber, resonator cavity fineness is 500.
4. a kind of optical communicating waveband generation device for continuous variable quantum entanglement source as described in any one of claim 1 ~ 3, it is characterized in that, optical communicating waveband continuous single frequency optical fiber laser (1) shoot laser centre wavelength is 1.5 μm, described doubler (2) is made up of two mirror optical resonators and I class Temperature Matching periodical poled crystal, and the laser center wavelength of doubler (2) outgoing is 775nm.
5. a kind of optical communicating waveband generation device for continuous variable quantum entanglement source as described in any one of claim 1 ~ 3, it is characterised in that the temperature of temperature control furnace is controlled by connected crystal temperature effect controller (8).
6. a kind of optical communicating waveband generation device for continuous variable quantum entanglement source as claimed in claim 4, it is characterised in that the temperature of temperature control furnace is controlled by connected crystal temperature effect controller (8).
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| CN108845330A (en) * | 2018-04-23 | 2018-11-20 | 山西大学 | A kind of laser distance measurement method based on frequency loop measurement |
| CN110138352A (en) * | 2019-06-17 | 2019-08-16 | 合肥本源量子计算科技有限责任公司 | A kind of quantum parameters amplifier |
| CN116793330A (en) * | 2023-08-25 | 2023-09-22 | 山西大学 | Quantum enhanced fiber optic gyroscope based on continuous variable quantum entanglement source and method |
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| CN108845330A (en) * | 2018-04-23 | 2018-11-20 | 山西大学 | A kind of laser distance measurement method based on frequency loop measurement |
| CN108845330B (en) * | 2018-04-23 | 2022-05-27 | 山西大学 | Laser ranging method based on loop frequency measurement |
| CN110138352A (en) * | 2019-06-17 | 2019-08-16 | 合肥本源量子计算科技有限责任公司 | A kind of quantum parameters amplifier |
| CN116793330A (en) * | 2023-08-25 | 2023-09-22 | 山西大学 | Quantum enhanced fiber optic gyroscope based on continuous variable quantum entanglement source and method |
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