CN208336804U - A kind of program-controlled microcavity orphan crystal frequency comb generation system - Google Patents
A kind of program-controlled microcavity orphan crystal frequency comb generation system Download PDFInfo
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- CN208336804U CN208336804U CN201821011240.1U CN201821011240U CN208336804U CN 208336804 U CN208336804 U CN 208336804U CN 201821011240 U CN201821011240 U CN 201821011240U CN 208336804 U CN208336804 U CN 208336804U
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Abstract
The utility model relates to optical frequency com technical fields, when for generating microcavity orphan frequency comb using existing microcavity frequency comb generation system, it cannot achieve automation and lead to the problem of microcavity orphan's frequency comb, a kind of program-controlled microcavity orphan crystal frequency comb generation system is provided.Program-controlled microcavity orphan crystal frequency comb generation system, including temperature controller, computer control system and sequentially connected narrow linewidth laser, optical amplifier, the first optoisolator, Polarization Controller, frequency comb generator, optical power beam splitter and light power meter；The frequency comb generator includes micro-ring resonant cavity and thermoregulator；Temperature controller is connected with thermoregulator；Narrow linewidth laser, light power meter and temperature controller are electrically connected with computer control system respectively；Optical power beam splitter is used to the frequency comb that frequency comb generator generates being divided into two-way, wherein accessing light power meter all the way；Another output.
Description
Technical field
The utility model relates to optical frequency com technical fields, and in particular to a kind of program-controlled microcavity orphan crystal frequency comb production
Raw system.
Background technique
Optical frequency com (abbreviation frequency comb) is the broadband light being made of series of discrete, equally spaced frequency content
Spectrum, and each frequency component has stable phase relation.Frequency comb is equivalent to an optical frequency synthesizer, is so far
Until it is most effective carry out absolute optical frequency measurement tool, can be accurate and simple by Cs atom microwave frequency marking and opctical frequency standard
It connects, is also accurate spectrum, astronomy for development high-resolution, high-precision, the frequency standard of high accuracy provides carrier
The scientific researches directions such as physics, quantum manipulation provide ideal research tool, gradually apply to optical frequency by people
The fields such as accurate measurement, the measurement of atomic ion transition energy level, the synchronization of remote signal clock and satellite navigation.
With the rapid development of optical communication technique, frequency comb is in the generation of optics random waveform, multi-wavelength ultra-short pulse generation
It is also widely paid close attention to fields such as dense wave division multipurpose.
Traditional frequency comb is generated by ultrashort pulse mode-locked laser, however it is long to be limited to mode-locked laser chamber, repetition
Usually less than 1GHz.And limited based on the frequency comb of electro-optical modulation by external drive radio frequency source, it is unfavorable for integrated.
In recent years, a large amount of research work had been carried out in the generation around microcavity orphan's frequency comb, in MgF2、SiO2、SiN
Orphan's frequency comb is produced in the flat microcavity of equal multiple materials, and in double comb rangings, double comb spectroscopy and ultrahigh speed parallel light
Application feasibility research is carried out in the fields such as the communication technology.Currently, generating mode locking orphan frequency comb based on exocoel frequency swept laser
Generated in a variety of micro-ring resonant cavities.It meets Modern Small, integrated trend, in Gao Zhongying and integrated aspect
With congenital sexual clorminance.
But due to the thermo-optic effect in microcavity, mode locking orphan frequency comb is generated based on exocoel frequency swept laser and requires orphan
Sub- frequency comb generates within the time of musec order, therefore dependent on complicated experimental technique, is difficult to accomplish real-time control.At present
Common technology includes mainly having rapid frequency-sweeping method and " power-kicking " method etc..Such method is stringent to timing requirements, meter
Calculation machine program can not judge the generation of microcavity orphan's frequency comb, and then can not automate and generate microcavity orphan frequency comb.
Utility model content
When the purpose of this utility model is for microcavity orphan frequency comb is generated using existing microcavity frequency comb generation system,
Due to stringent to timing requirements, it cannot achieve and the generation of microcavity orphan's frequency comb is judged using computer program, thus
It cannot achieve automation and lead to the problem of microcavity orphan's frequency comb, and a kind of program-controlled microcavity orphan crystal frequency comb generation system is provided
System.
To achieve the above object, the utility model provides a kind of program-controlled microcavity orphan crystal frequency comb generation system, special
Different place is: including temperature controller, computer control system and sequentially connected narrow linewidth laser, optical amplifier
Device, the first optoisolator, Polarization Controller, frequency comb generator, optical power beam splitter and light power meter；The frequency comb occurs
Device includes micro-ring resonant cavity and thermoregulator；Temperature controller is connected with thermoregulator, for controlling micro-ring resonant cavity
Operating temperature；Narrow linewidth laser, light power meter and temperature controller are electrically connected with computer control system respectively；Narrow linewidth swashs
Light device is used to generate the laser signal of micro-ring resonant cavity；Optical amplifier makes laser power reach production for amplifying laser signal
Power needed for raw microcavity frequency comb；First optoisolator is used to guarantee the one-way transmission of laser, guarantees the stabilization of optical amplifier
Work；Polarization Controller is used to control the polarization state of laser, is allowed to generate the mode of orphan's crystal frequency comb with micro-ring resonant cavity
It is consistent；Optical power beam splitter is used to the frequency comb that frequency comb generator generates being divided into two-way, wherein accessing optical power all the way
Meter, light power meter is used to detect the energy variation of frequency comb and detectable signal is transmitted to computer control system, as optical frequency
The detection of pectination state；Another output.
Further, the second optoisolator is also connected between above-mentioned frequency comb generator and optical power beam splitter.Second light
Isolator is used to guarantee the one-way transmission of laser, avoids output light since reflection effect has an impact frequency comb generator, protects
Demonstrate,prove the steady operation of frequency comb generator.
Further, above-mentioned narrow linewidth laser uses the narrow linewidth pump laser of fixed wave length.
Further, the narrow linewidth pump laser of above-mentioned fixed wave length uses narrow linewidth semiconductor laser or narrow linewidth
Optical fiber laser has high wavelength stability.
Further, above-mentioned optical amplifier, which uses, mixes bait optical amplifier or semi-conductor optical amplifier or Raman fiber
Amplifier.
Further, above-mentioned first optoisolator, the second optoisolator are all made of optical fibre light isolator.
Further, above-mentioned Polarization Controller uses optical fiber polarization controller or slide type Polarization Controller；Micro-loop is humorous
Chamber shake using Add/drop Voice Channel type micro-ring resonant cavity or the micro-ring resonant cavity of wildcard-filter style.
Further, above-mentioned thermoregulator uses semiconductor cooler or surface metal heater；Temperature controller
Using semiconductor cooler controller or adjustable current source.
Further, above-mentioned optical power beam splitter is using the tapered optical power beam splitter of drawing or planar waveguide-type optical power point
Beam device.
The utility model generates orphan's crystal frequency comb using above-mentioned program-controlled microcavity orphan crystal frequency comb generation system
Process is as follows:
1) above-mentioned program-controlled microcavity orphan crystal frequency comb generation system is built；
2) output power and optical maser wavelength of narrow linewidth laser are set, the output power and polarization of optical amplifier are set
The state of controller；The regulations speed of the unit of light power meter, the judgment threshold of orphan's frequency comb, temperature controller is set；
3) the initial operating temperature value of micro-ring resonant cavity is set, optical maser wavelength is made to be located at a resonance peak of micro-ring resonant cavity
Shortwave strong point；
4) operating temperature of micro-ring resonant cavity is gradually reduced, while reading the detection of frequency comb power by light power meter
Value；
5) when the frequency comb power detection value read is greater than the judgment threshold of orphan's frequency comb, slow down cooling rate；
6) when detecting slippage >=0.2dB of frequency comb power detection value, stop cooling to get orphan's crystal light is arrived
Frequency is combed.
Compared with prior art, the utility model has the advantages that:
1, the criterion that the variation of the utility model using frequency comb power is generated as microcavity orphan's frequency comb, using program control
The method of system generates microcavity orphan crystal frequency comb, and relative to spectrum method of discrimination, the utility model is at low cost, rate is high
With feature easy to operate, the efficiency for generating orphan's frequency comb is improved.
2, the microcavity orphan's frequency comb provided by the utility model controlled by computer automatically generates system, uses fixation
The narrow linewidth laser of wavelength is pumping source, lower relative to frequency swept laser cost and be easier to the system integration.
3, program-controlled microcavity orphan crystal frequency comb generation system provided by the utility model has good temperature and vibration
Dynamic stability has excellent system robustness.System operatio is simple and convenient, and stability is high, facilitates frequency comb generation system
Engineering application and Rapid Popularization.Meet engineer application (Microwave photonics, celestial spectrum measurement and parallel optical fibre communication etc.
System) to the use demand of program-controlled microcavity frequency comb, the especially demand to soliton state microcavity frequency comb.
Working principle of the utility model is:
Light field experienced laser state, main comb state, modulational instability in micro-ring resonant cavity during orphan's frequency comb generates
Four kinds of frequency comb state, orphan's frequency comb state states, it is detuning (to generate the resonant frequency and incident laser frequency of the micro-ring resonant cavity of frequency comb
The difference of rate) it is corresponding from blue detuning (detuning is negative value) to the process of red detuning (detuning is positive value), change micro-ring resonant cavity
The resonance wavelength of the adjustable micro-loop of temperature, it is detuning so as to adjust, generate orphan's frequency comb.
When frequency comb is in modulational instability frequency comb state, the energy in micro-ring resonant cavity is higher, when modulation is unstable
When qualitative frequency comb is converted into orphan's frequency comb, the energy of micro-ring resonant cavity can decline suddenly, and it is humorous that energy variation causes micro-loop
The variation of the temperature of vibration chamber causes the resonance wavelength drift of micro-ring resonant cavity, therefore borrow exocoel frequency swept laser usually needs
Orphan's frequency comb quickly to be generated with corresponding energy compensation process (such as power-picking method) to make up fuel factor.Cause
To be stringent to timing requirements, therefore it cannot achieve and the generation of microcavity orphan's frequency comb is judged using computer program, thus
The automation that cannot achieve microcavity orphan's frequency comb generates.
But the energy of the orphan's crystal frequency comb of research discovery recently is identical as the energy of modulational instability frequency comb,
With excellent temperature stability, to the adjustment speed of frequency comb, there is no strict requirements, have program-controlled generation orphan's light
The precondition of frequency comb.Meanwhile when generating orphan's crystal frequency comb, the power of frequency comb has certain decline.Therefore, this is practical
It is novel using the changed power of frequency comb as judgment basis, realize microcavity orphan's crystal frequency comb of computer program control from movable property
It is raw.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the program-controlled microcavity orphan crystal frequency comb generation system embodiment of the utility model；
Fig. 2 is the spectrogram of two vacant soliton crystal frequency combs；
Fig. 3 is the spectrogram of ideal state soliton crystal frequency comb；
Fig. 4 is the setting voltage change curve of temperature controller；
Fig. 5 is frequency comb changed power curve.
Each label is described as follows in figure:
1- narrow linewidth laser, 2- optical amplifier, the first optoisolator of 3-, 4- Polarization Controller, 5- frequency comb occur
Device, the second optoisolator of 6-, 7- optical power beam splitter, 8- light power meter, 9- temperature controller, 10- computer control system.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Referring to Fig. 1, program-controlled microcavity orphan crystal frequency comb generation system provided in this embodiment, including temperature controller 9
With computer control system 10 and pass through the sequentially connected narrow linewidth laser 1 of single mode optical fiber, optical amplifier 2, the first light
Isolator 3, Polarization Controller 4, frequency comb generator 5, the second optoisolator 6, optical power beam splitter 7 and light power meter 8.
Wherein, semiconductor laser of the narrow linewidth laser 1 using fixed transmission frequency, line width 100kHz, output
Wavelength is 1560.3nm.Optical amplifier 2 uses high-power erbium-doped fiber amplifier, and fiber type is single mode optical fiber, defeated
Power maximum can achieve 10W out, and operation wavelength wave band is C-band；First optoisolator 3 is the optical fiber that can bear 10W power
Type optoisolator；Polarization Controller 4 is tricyclic optical fiber polarization controller, can bear the optical power of 10W or more；First optical isolation
Device 6 is the optical fibre light isolator that commercial 300mW optical power bears energy；Optical power beam splitter 7 is 1:9 power splitting ratio
Draw tapered optical power beam splitter；Light power meter 8 is the commercial light power meter with serial communication interface, with high-resolution light function
Rate meter, and the communication interface with external system；Temperature controller 9 is commercial TEC controller, with voltage control temperature
Interface.
Frequency comb generator includes encapsulating housing, the thermoregulator and micro-ring resonant cavity that are encapsulated in encapsulating housing,
Middle encapsulating housing uses 14 pin butterfly encapsulating structures of standard；Thermoregulator uses existing semiconductor cooler and temperature-sensitive
Resistor；Temperature controller 9 is arranged outside the encapsulating housing and is connected with thermoregulator, the operating temperature of micro-ring resonant cavity
It is controlled by external temperature controller 9；Micro-ring resonant cavity uses the micro-ring resonant cavity of Add/drop Voice Channel type.Micro-ring resonant cavity
It for the core devices of this system, is made by high index-contrast integreted phontonics platform, which is partly led using cmos compatible
Body technology is easy to be mass produced.There is high nonlinear coefficient by the waveguide of high index-contrast integreted phontonics platform production, and
With Negative Dispersion Properties.
Narrow linewidth laser 1 is that optical amplifier 2 provides seed source；Optical amplifier 2 is soliton crystal frequency comb
It generates and sufficiently strong pump light signals is provided；First optoisolator 3 guarantees that external reflection light does not enter erbium-doped fiber amplifier
(EDFA), guarantee the steady operation of erbium-doped fiber amplifier (EDFA)；Polarization Controller 4 is incident on micro-ring resonant cavity for adjusting
Pump light polarization state, be allowed to micro-ring resonant cavity generate the mode of orphan's crystal frequency comb it is consistent.Frequency comb generator 5
For generating orphan's crystal frequency comb；First optoisolator 6 emulates exterior light and enters micro-loop from the output port of micro-ring resonant cavity
Resonant cavity guarantees the steady operation of frequency comb system；Optical power beam splitter 7 divides the energy of frequency comb to carry out power for extraction unit
Detection, the probe value is as the standard for differentiating that orphan's crystal frequency comb generates；Light power meter 8 is used to detect the energy quantitative change of frequency comb
Change, provides distinguishing rule for control program；Computer control system 10 controls narrow linewidth laser 1 and thermoregulator, reads
The probe value of light power meter is taken, is controlled and discriminates whether to form orphan's crystal frequency comb.
The present embodiment generates the mistake of orphan's crystal frequency comb using above-mentioned program-controlled microcavity orphan crystal frequency comb generation system
Journey is as follows: 1) building above-mentioned program-controlled microcavity orphan crystal frequency comb generation system；
2) output power that narrow linewidth pump laser is arranged is 10mW, and transmitting optical maser wavelength is 1560.3nm；Light is set
The output power for learning amplifier is 34.3dBm；And the state of modulating polarization controller, obtain the TE mode of micro-ring resonant cavity most
Big pump power；The parameters such as the unit of power meter, the regulations speed of the judgment threshold of orphan's frequency comb, temperature controller are set
(when modulational instability frequency comb is converted into orphan's crystal frequency comb, the energy in microcavity declines suddenly, i.e. the meeting of output end energy
There is unexpected variation, the difference of this variation is the judgment threshold of orphan's crystal frequency comb)；
3) the initial operating temperature value of micro-ring resonant cavity is set by temperature controller, pumping laser wavelength is made to be located at micro-loop
The shortwave strong point of one resonance peak of resonant cavity；
4) operating temperature of micro-ring resonant cavity is gradually reduced, while reading the detection of frequency comb power by light power meter
Value；
5) when the frequency comb power detection value read is greater than the judgment threshold of orphan's frequency comb, slow down cooling rate；
6) when detecting slippage >=0.2dB of frequency comb power detection value, stop cooling to get orphan's crystal light is arrived
Frequency is combed.
Fig. 2 and Fig. 3 is two omissions that the program-controlled orphan's crystal frequency comb generation system of the present embodiment generates and ideal orphan
The spectrogram of crystal frequency comb.The frequency comb changed power curve that detects in experiment is as shown in figure 5, near 40s, optical power
It significantly decreases, indicates the generation of orphan's crystal frequency comb.Control voltage change curve such as Fig. 4 institute of temperature controller
Show.
To sum up, program-controlled microcavity orphan crystal frequency comb generation system provided by the utility model, overcomes existing microcavity light
Dependence of the frequency comb generation system to operator's technical ability, the automation for realizing microcavity orphan's frequency comb generate.The system operatio
Simple and convenient, system stability is high.The engineering application and Rapid Popularization, the system for helping to realize frequency comb generation system exist
The fields such as the following ultra high-speed optical communication system, Microwave photonics, optical analog to digital conversion are with a wide range of applications.
Claims (9)
1. a kind of program-controlled microcavity orphan crystal frequency comb generation system, it is characterised in that: including temperature controller (9), computer
Control system (10) and sequentially connected narrow linewidth laser (1), optical amplifier (2), the first optoisolator (3), polarization
Controller (4), frequency comb generator (5), optical power beam splitter (7) and light power meter (8)；
The frequency comb generator (5) includes micro-ring resonant cavity and thermoregulator；Temperature controller (9) and the temperature are adjusted
Device is connected；Narrow linewidth laser (1), light power meter (8) and temperature controller (9) are electrically connected with computer control system (10) respectively
It connects；
Optical power beam splitter (7) is used to the frequency comb that frequency comb generator (5) generate being divided into two-way, wherein accessing light function all the way
Rate meter (8)；Another output.
2. program-controlled microcavity orphan crystal frequency comb generation system according to claim 1, it is characterised in that: the frequency comb
The second optoisolator (6) are also connected between generator (5) and optical power beam splitter (7).
3. program-controlled microcavity orphan crystal frequency comb generation system according to claim 1 or 2, it is characterised in that: described narrow
Line width laser (1) uses the narrow linewidth pump laser of fixed wave length.
4. program-controlled microcavity orphan crystal frequency comb generation system according to claim 3, it is characterised in that: the fixed wave
Long narrow linewidth pump laser uses narrow linewidth semiconductor laser or narrow cable and wide optical fiber laser.
5. program-controlled microcavity orphan crystal frequency comb generation system according to claim 4, it is characterised in that: the optics is put
Big device (2), which uses, mixes bait optical amplifier or semi-conductor optical amplifier or Raman Fiber Amplifier.
6. program-controlled microcavity orphan crystal frequency comb generation system according to claim 5, it is characterised in that: first light
Isolator (3), the second optoisolator (6) are all made of optical fibre light isolator.
7. program-controlled microcavity orphan crystal frequency comb generation system according to claim 6, it is characterised in that: the polarization control
Device (4) processed uses optical fiber polarization controller or slide type Polarization Controller；The micro-ring resonant cavity is micro- using Add/drop Voice Channel type
The micro-ring resonant cavity of annular resonant cavity or wildcard-filter style.
8. program-controlled microcavity orphan crystal frequency comb generation system according to claim 7, it is characterised in that: the temperature tune
It saves device and uses semiconductor cooler or surface metal heater；Temperature controller (9) using semiconductor cooler controller or
Person's adjustable current source.
9. program-controlled microcavity orphan crystal frequency comb generation system described according to claim 1 or 2 or 7 or 8, it is characterised in that:
The optical power beam splitter (7) is using the tapered optical power beam splitter of drawing or planar waveguide-type optical power beam splitter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616030A (en) * | 2018-06-28 | 2018-10-02 | 中国科学院西安光学精密机械研究所 | A kind of program-controlled microcavity orphan crystal frequency comb generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616030A (en) * | 2018-06-28 | 2018-10-02 | 中国科学院西安光学精密机械研究所 | A kind of program-controlled microcavity orphan crystal frequency comb generation system and method |
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