CN108196412A - A kind of 10MHz-10GHz optical phase-locked loops device - Google Patents
A kind of 10MHz-10GHz optical phase-locked loops device Download PDFInfo
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- CN108196412A CN108196412A CN201810014050.3A CN201810014050A CN108196412A CN 108196412 A CN108196412 A CN 108196412A CN 201810014050 A CN201810014050 A CN 201810014050A CN 108196412 A CN108196412 A CN 108196412A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 48
- 239000004065 semiconductor Substances 0.000 claims abstract description 31
- 238000001228 spectrum Methods 0.000 claims abstract description 23
- 238000009413 insulation Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 230000035559 beat frequency Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000010183 spectrum analysis Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 230000005283 ground state Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052701 rubidium Inorganic materials 0.000 description 2
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000960 laser cooling Methods 0.000 description 1
- 238000000651 laser trapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
Abstract
The present invention relates to optical phase-locked loop field, 10 MHz of one kind, 10 GHz optical phase-locked loop devices, including ti sapphire laser（1）, semiconductor laser（2）, high bandwidth photodetector（3）, radio-frequency power beam splitter（4）, spectrum analyzer（5）, HF signal generator（6）, frequency mixer（7）, radio-frequency power amplifier（8）, signal generator（9）, optical phase-locked loop module（10）, oscillograph（11）, the present apparatus can realize locking of two lasers in 10 MHz to optional frequency difference between 10 GHz frequencies, and sustainable steady operation, be affected by the external environment small.
Description
Technical field
The present invention relates to light and the nonlinear optics of atomic coberent medium and quantum optical research field, as electromagnetically induced is saturating
The technical fields such as bright, multi-wave mixing and quantum imaging, quantum accurate measurement, it is more particularly to a kind of to utilize light and atomic coberent phase
Interaction prepares the optical phase-locked loop field of light field Non-classical States.
Background technology
In the non-linear process of light and atomic interaction, atomic coberent effect plays key player.Phase coherence light
Be widely applied in quantum optices experimental study with former molecular COHERENT MEDIUM, as electromagnetically induced is transparent, quantum communications,
The fields such as multi-wave mixing and laser cooling and trapping atom.In above application, generating has several GHz difference on the frequencies and phase
Two constant beams of difference or multi-beam are necessary.For example, 85 atomic ground state hyperfine of rubidium is split into 3 GHz, 87 atom of rubidium
Ground state hyperfine splitting is 6.8 GHz, and 133 atomic ground state hyperfine of caesium is split into 9.2 GHz.Therefore 10 GHz can be generated to appoint
The two-beam of meaning difference on the frequency can meet most of needs for being related to light and being studied with atomic interaction.
Experimentally two beam difference on the frequencies of common generation are main for the method for several GHz and the two-beam of constant phase difference at present
Have following several：One kind is using acousto-optic modulator, and the two-beam that this method generates has a constant phase difference, but current quotient
Acousto-optic modulator maximum can only generate 1.5 GHz frequency displacements, and frequency tuning range is only 100 MHz or so, diffraction efficiency
Only 10% or so, it is follow-up to need to generate high power-beam by amplifying；Second is to generate sideband using electrooptic modulator
Method generates positive and negative sideband using radio-frequency signal generator driving electrooptic modulator, then by wave filter by required sideband signals
It filters out, compared with acousto-optic modulator, electrooptic modulator can realize the frequency displacement of higher frequency and higher efficiency, such as current commercialization
Electrooptic modulator realizes that 9.2 GHz shift efficiencies are up to 30% or so.However, Electro-optical Modulation identical with acousto-optic modulator
The modulation bandwidth of device is also only 100 MHz or so, and the centre frequency of commercial product is fixed, and can only realize particular frequency range
Shift frequency is not used to different Atomic Physics experiments, that is, lacks popularity.Compared to both the above method, using optical phase-locked loop come
Realize the PGC demodulation of two-beam, this method can realize the locking of optional frequency difference in several GHz ranges.Early in last century
The sixties, optical phase-locked loop are just used to two lasers of locking so as to obtain the two beams even larger phase phase of multi beam difference on the frequency
The dry light in position.2015, University Of Shanxi Zhang Jing professors group realized 6.8 GHz's of difference on the frequency using homemade optical phase-locked loop
The difference on the frequency locking of two-beam, and beat frequency line width reaches Hz magnitudes.Core component is Analog in its homemade optical phase-locked loop
The ADF4107 optical phase-locked loop modules of company, bandwidth are 1 GHz -7 GHz, 20 MHz-250 of reference signal input frequency range
MHz.If the two-beam difference on the frequency of locking changes, the programmable input port in outfit is needed to change R frequency dividers and Fractional-N frequency
Device, and need to reset systematic parameter, debug.
Invention content
The technical problems to be solved by the invention are：How to overcome the shortcomings of background technology, provide a kind of realization 10 MHz
The device of the optical phase-locked loop of the locking of optional frequency difference in 10 GHz ranges.
The technical solution adopted in the present invention is：A kind of 10 MHz-10 GHz optical phase-locked loop devices, swash including Ti∶Sapphire laser
Light device（1）, semiconductor laser（2）, high bandwidth photodetector（3）, radio-frequency power beam splitter（4）, spectrum analyzer（5）、
HF signal generator（6）, frequency mixer（7）, radio-frequency power amplifier（8）, signal generator（9）, optical phase-locked loop module
（10）, oscillograph（11）, the high bandwidth photodetector（3）Detect the ti sapphire laser（1）With the semiconductor
Laser（2）Output light generate beat signal be sent to the radio-frequency power beam splitter（4）, the radio-frequency power beam splitter
（4）The beat signal received is divided into the equal two-way of power and is sent respectively to the spectrum analyzer（5）With the mixing
Device（7）, the HF signal generator（6）It generates a sinusoidal signal and is sent to the frequency mixer（7）, the frequency mixer（7）
It receives and beat signal frequency reducing is then sent to the radio-frequency power amplifier after beat signal（8）, the radio-frequency power puts
Big device（8）The optical phase-locked loop module will be sent to after beat signal amplification after frequency reducing（10）, the signal generator（9）
It generates reference signal and is sent to the optical phase-locked loop module（10）, the optical phase-locked loop module（10）After the frequency reducing of amplification
Beat signal and reference signal mixing generate error signal be sent to oscillograph（11）, while optical phase-locked loop module（10）Production
Raw error signal is sent to the semiconductor laser by generating feedback signal after frequency and phase discrimination（2）And oscillograph（11）.
As a kind of preferred embodiment：The ti sapphire laser（1）With the semiconductor laser（2）It is both placed in one
Independence, shock insulation, thermal insulation optical table on, periphery capping heat screen be isolated with external environment.
As a kind of preferred embodiment：Spectrum analyzer（5）For detecting ti sapphire laser（1）And semiconductor laser
（2）Difference on the frequency.
As a kind of preferred embodiment：The phase-locked loop module（10）Locking switch realize ti sapphire laser（1）With half
Conductor laser（2）Difference on the frequency and phase difference locking.
The beneficial effects of the invention are as follows：Ti sapphire laser by needed for internal lock loop frequency stabilization to experiment in frequency,
The beat signal of semiconductor laser and ti sapphire laser mixes down to 80 MHz or so by frequency mixer, a phase noise compared with
The 80 MHz signals that low signal generator generates are used as with reference to signal, and optical phase-locked loop module is by comparing beat signal and ginseng
The difference on the frequency and phase difference of signal are examined, feedback signal back is exported in real time and returns semiconductor laser, ensure beat signal always
Consistent with the frequency and phase of reference signal, i.e. the frequency of semiconductor laser follows ti sapphire laser to change always.This hair
It is bright using the mFALC110 that Toptica companies produce as the core component of phaselocked loop, it is easy to operate, it can be achieved that 10 MHz extremely
The locking of optional frequency difference in 10 GHz ranges.
Specific embodiment
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the optical phase-locked loop module monitors port output signal spectrum that heretofore described channel oscilloscope one records；
Fig. 3 is the optical phase-locked loop module output port output signal spectrum that heretofore described channel oscilloscope two records；
Fig. 4 is the beat signal spectral line that the unlocked Time-frequency Spectrum Analysis instrument of present system monitors, figure intermediate frequency spectrum analyzer center
Frequency is 9.2 GHz, and 20 MHz of scanning range, analysis bandwidth is 300 kHz；
Fig. 5 is the beat signal spectral line that present system locking Time-frequency Spectrum Analysis instrument monitors, and figure intermediate frequency spectrum analyzer center is frequently
Rate is 9.2 GHz, and 20 MHz of scanning range, analysis bandwidth is 30 kHz；
Fig. 6 is the beat signal spectral line that present system locking Time-frequency Spectrum Analysis instrument monitors, and figure intermediate frequency spectrum analyzer center is frequently
Rate is 9.2 GHz, and 20 Hz of scanning range, analysis bandwidth is 1 Hz.
Wherein, 1, the signal spectrum after one system lock of channel, 2, the unlocked signal spectrum of one system of channel, 3, channel two
The unlocked signal spectrum of system, 4, channel two system locking after signal spectrum.
Specific embodiment
The present embodiment is corresponded to locking the difference on the frequency of two light beams of output133Cs atomic ground state hyperfines divide（9.2 GHz）
Two lasers for illustrate, as shown in Figure 1, a kind of 10 MHz-10 GHz optical phase-locked loop devices, including Ti∶Sapphire laser
Laser 1, semiconductor laser 2, high bandwidth photodetector 3（The KG- of Beijing Kang Guan centuries Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017 production
PD-20G-A-SM-FA）, radio-frequency power beam splitter 4（The ZX10-2-1252+ of Mini-Circuits companies production）, spectrum analysis
Instrument 5, HF signal generator 6（The MG3692B-20-GHz of Anrits companies production）, frequency mixer 7（Mini-Circuits companies
The ZMX-10G+ of production）, radio-frequency power amplifier 8（The ZHL-1-2W+ of Mini-Circuits companies production）, signal generator
9th, optical phase-locked loop module 10（The mFALC110 of Toptica companies production, input signal bandwidth are 10 MHz-200 MHz,
The best input power range of prevention at radio-frequency port is -35 dBm-1 dBm, and the best input power range in local oscillations port is -8
dBm--3 dBm）, oscillograph 11（The 33250A of Agilent companies production）.
The ti sapphire laser and the semiconductor laser be both placed in an independence, shock insulation, thermal insulation optics put down
On platform, periphery capping heat screen is isolated with external environment, it is ensured that output frequency is stable, the light source of power stability.The Ti∶Sapphire laser
Laser and the semiconductor laser respectively separate two-beams of 2.5 mW with identical polarization will by same root single mode optical fiber
Optical coupling inputs the high bandwidth photodetector 3 that a bandwidth is 20 GHz.What the detection of high bandwidth photodetector 3 generated
Beat signal power is -30 dBm, and it is equal that the electric signal of -30 dBm by the radio-frequency power beam splitting 4 is divided into power
Two-way is respectively used to monitoring and locking frequency is poor.The beat signal inputs the spectrum analyzer 5 and monitors its beat frequency letter all the way
Number power and beat signal spectral bandwidth, the prevention at radio-frequency port of the beat signal another way input mixing 7, the height
Frequency signal generator 6 generates the sinusoidal signal that a frequency is 9.12 GHz, power is+7 dBm and inputs the frequency mixer 7
Local oscillations port.Beat signal frequency is reduced to 80 MHz or so by the frequency mixer 7, and corresponding power is -38 dBm, described
Signal power is amplified to -4 dBm, the power -4 by beat signal using the radio-frequency power amplifier 8 from -38 dBm
DBm, frequency input the prevention at radio-frequency port of the optical phase-locked loop module 10, the high-frequency signal for the beat signal of 80 MHz or so
6 output frequency of generator, 80 MHz, -4 dB of power reference signal input the local oscillations end of the optical phase-locked loop module 10
Mouthful.The optical phase-locked loop module 10 is by internal mixers by the reference of the beat signal of prevention at radio-frequency port and local oscillations port
Signal mixing generates error signal, and error signal is generated feedback signal after frequency and phase discrimination.The optical phase-locked loop module 10 is produced
Raw feedback signal feeds back to existing two lasers of direct-flow input end cause for gossip of the semiconductor laser 2 by output port
Difference on the frequency and phase difference locking.The direct-flow input end mouth input voltage amplitude of the semiconductor laser 2 is no more than ± 0.8
V.The beat signal is inputted the spectrum analyzer by the spectrum analyzer 5 for being arranged on 4 top of radio-frequency power beam splitter
Beat signal is monitored to judge the difference on the frequency lock condition of two lasers.It is arranged on 10 left of optical phase-locked loop module
The oscillograph 11, channel one are used for monitoring the error signal that the optical phase-locked loop module 10 monitors port output, lead to
Road two is used for monitoring the feedback signal of 10 output port of the optical phase-locked loop module output, and it is described to ensure that its amplitude is not got higher than
The input voltage amplitude range of the direct-flow input end mouth of semiconductor laser.
Ti sapphire laser is by needed for internal lock loop frequency stabilization to experiment in frequency, semiconductor laser and Ti∶Sapphire laser
The beat signal of laser mixes down to 80 MHz or so by frequency mixer, and the relatively low signal generator of a phase noise generates
80 MHz signals are used as with reference to signal, and optical phase-locked loop module is by comparing the difference on the frequency and phase of beat signal and reference signal
Difference exports feedback signal back and returns semiconductor laser, ensures beat signal and the frequency and phase of reference signal always in real time
Position is consistent, i.e. the frequency of semiconductor laser follows ti sapphire laser to change always.
The present invention using the mFALC110 phase-locked loop modules of Toptica companies production as optical phase-locked loop core component,
One semiconductor laser is locked on a ti sapphire laser by realization, and the difference on the frequency of two beam laser can realize 10 MHz extremely
The arbitrary fine adjustment of 10 GHz, and beat frequency line width is down to 1 Hz.The result shows that the two-beam that the device generates has well
Coherence enhances the nonlinear effect of light and atomic medium, can be applied to Non-classical State of Light in quantum optices field
It prepares.
As shown in Fig. 2, ti sapphire laser frequency stabilization, starts to change the frequency of semiconductor laser, when two laser
When device difference on the frequency is near 9.2 GHz, monitoring signal is recorded as shown in 2 curves in Fig. 2 in channel oscilloscope one, monitors signal
It is that the beat signal of the prevention at radio-frequency port of optical phase-locked loop module and the reference signal of local oscillations port are mixed by built-in frequency mixer
It is after frequency as a result, the low frequency term comprising difference frequency with and frequency high frequency item.3 curves in Fig. 3 are recorded for channel oscilloscope two at this time
Optical phase-locked loop module output port output feedback voltage signal.
When two laser frequency differences deviate 9.2 GHz, optical phase-locked loop module believes the feedback voltage of output port
Number feed back to the direct-flow input end mouth of semiconductor laser, the electric current fast modulation of noise spectra of semiconductor lasers ensures and Ti∶Sapphire laser
Laser frequency difference is always 9.2 GHz.
4 curves in 1 curve and Fig. 3 in Fig. 2 illustrate optics after the difference on the frequency of two lasers and phase difference locking
The monitoring port of phase-locked loop module and the output voltage signal of output port, voltage value stabilization is near 0.Output port it is defeated
It is about 0.1 V to go out voltage magnitude, without departing from semiconductor laser ± 0.8 V of direct-flow input end mouth input voltage amplitude will
It asks.
The beat signal power spectrum of two laser output lights, figure intermediate frequency when Fig. 4 is not locked for optical phase-locked loop module
Spectrum analysis instrument centre frequency is 9.2 GHz, and 20 MHz of scanning range, analysis bandwidth is 300 kHz.Due to semiconductor laser
Free-running, the relative phase and relative frequency of two-beam arbitrarily change, without fixed phase difference and difference on the frequency, beat signal
Centre frequency is 9.2 GHz, and line width is about 5 MHz.
After Fig. 5 is realizes difference on the frequency and phase difference locking, the beat signal power spectrum of two laser output lights, compared to
Fig. 4, the line width of beat signal are significantly narrowed.
Fig. 6 is that present system locks the beat signal spectral line that monitors of Time-frequency Spectrum Analysis instrument, in figure intermediate frequency spectrum analyzer
Frequency of heart is 9.2 GHz, and 20 Hz of scanning range, analysis bandwidth is 1 Hz.This it appears that the bandwidth of beat signal in figure
It is narrowed from 5 MHz to 1 Hz, line width is narrower, and the frequency for showing two lasers is more synchronous with phase change, i.e. semiconductor laser
Always ti sapphire laser is followed to change, realizes the difference on the frequency of two lasers and phase difference locking.
Claims (4)
1. a kind of 10MHz-10GHz optical phase-locked loops device, it is characterised in that：Including ti sapphire laser（1）, semiconductor laser
Device（2）, high bandwidth photodetector（3）, radio-frequency power beam splitter（4）, spectrum analyzer（5）, HF signal generator（6）、
Frequency mixer（7）, radio-frequency power amplifier（8）, signal generator（9）, optical phase-locked loop module（10）, oscillograph（11）, it is described
High bandwidth photodetector（3）Detect the ti sapphire laser（1）With the semiconductor laser（2）Output light generate
Beat signal is sent to the radio-frequency power beam splitter（4）, the radio-frequency power beam splitter（4）By the beat signal received point
The two-way equal for power is sent respectively to the spectrum analyzer（5）With the frequency mixer（7）, the HF signal generator
（6）It generates a sinusoidal signal and is sent to the frequency mixer（7）, the frequency mixer（7）Beat frequency is believed after receiving beat signal
Number frequency reducing is then sent to the radio-frequency power amplifier（8）, the radio-frequency power amplifier（8）By the beat signal after frequency reducing
The optical phase-locked loop module is sent to after amplification（10）, the signal generator（9）It generates reference signal and is sent to the light
Learn phase-locked loop module（10）, the optical phase-locked loop module（10）Beat signal after the frequency reducing of amplification and reference signal are mixed
It generates error signal and is sent to oscillograph（11）, while optical phase-locked loop module（10）The error signal of generation passes through frequency and phase discrimination
Feedback signal is generated afterwards is sent to the semiconductor laser（2）And oscillograph（11）.
2. a kind of 10MHz-10GHz optical phase-locked loops device according to claim 1, it is characterised in that：The Ti∶Sapphire laser
Laser（1）With the semiconductor laser（2）Be both placed in an independence, shock insulation, thermal insulation optical table on, periphery capping
Heat screen is isolated with external environment.
3. a kind of 10MHz-10GHz optical phase-locked loops device according to claim 1, it is characterised in that：Spectrum analyzer
（5）For detecting ti sapphire laser（1）And semiconductor laser（2）Difference on the frequency.
4. a kind of 10MHz-10GHz optical phase-locked loops device according to claim 1, it is characterised in that：The phaselocked loop
Module（10）Locking switch realize ti sapphire laser（1）And semiconductor laser（2）Difference on the frequency and phase difference locking.
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| CN201810014050.3A CN108196412B (en) | 2018-01-08 | 2018-01-08 | 10MHz-10GHz optical phase-locked loop device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021090054A (en) * | 2019-12-04 | 2021-06-10 | ハネウェル・インターナショナル・インコーポレーテッドＨｏｎｅｙｗｅｌｌ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｉｎｃ． | Bichromatic laser for quantum computing application |
| WO2023106923A1 (en) * | 2021-12-08 | 2023-06-15 | Technische Universiteit Delft | Method and system for matching frequencies of lasers in a quantum communication system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021090054A (en) * | 2019-12-04 | 2021-06-10 | ハネウェル・インターナショナル・インコーポレーテッドＨｏｎｅｙｗｅｌｌ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｉｎｃ． | Bichromatic laser for quantum computing application |
| JP7093394B2 (en) | 2019-12-04 | 2022-06-29 | ハネウェル・インターナショナル・インコーポレーテッド | Two-color laser for quantum computing |
| WO2023106923A1 (en) * | 2021-12-08 | 2023-06-15 | Technische Universiteit Delft | Method and system for matching frequencies of lasers in a quantum communication system |
| NL2030077B1 (en) * | 2021-12-08 | 2023-06-22 | Univ Delft Tech | Method and system for matching frequencies of lasers in a quantum communication system |
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