CN106299995A - Spacing based on micro-nano resonator cavity is adjustable orphan's frequency comb system and control method - Google Patents
Spacing based on micro-nano resonator cavity is adjustable orphan's frequency comb system and control method Download PDFInfo
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- CN106299995A CN106299995A CN201610575016.4A CN201610575016A CN106299995A CN 106299995 A CN106299995 A CN 106299995A CN 201610575016 A CN201610575016 A CN 201610575016A CN 106299995 A CN106299995 A CN 106299995A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
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- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention provides a kind of spacing based on micro-nano resonator cavity adjustable orphan frequency comb system and control method, described method is carried out in three steps regulation: amplify pumping micro-nano resonator cavity after filtering initially with single light source, find pump light can be coupled into the wave-length coverage of micro-nano resonator cavity, and determine that orphan produces the wave-length coverage of the bistable region of correspondence；Then with wavelength be the intracavity power under first step surveying record start to increase time the single light source pump cavity of respective value thus produce optical frequency com；Finally the wavelength of second step single light source being adjusted to bistable region corresponding wavelength, be simultaneously introduced wavelength and be less than another light source at N times of FSR of this light source, the two is commonly coupled in resonator cavity, progressively develops and orphan's frequency comb；When pump light source frequency interval is N times of FSR, the spectral line interval of orphan's frequency comb is also N times of FSR accordingly.The present invention can produce separation of spectra adjustable orphan frequency comb, it is not necessary to the problem considering pump wavelength regulations speed.
Description
Technical field
The present invention relates to optical frequency com technical field, in particular it relates to a kind of spacing based on micro-nano resonator cavity is adjustable
Orphan's frequency comb system and control method.
Background technology
Optical frequency com refer in frequency domain a series of accurately the most at equal intervals and the narrowest discrete spectrum of live width, in time domain then
A series of equally spaced ultrashort light pulse sequences, be mainly used in millimeter wave/Terahertz communication, precision optics frequency measurement,
The fields such as spectral calibration, absolute distance measurement, radio frequency photonics, are the generation of high frequency Low phase noise signal source, high speed optical communication light source
Generation, optics AWG (Arbitrary Waveform Generator), physics constant are measured, terrestrial planet detects, dark matter dark energy is studied, optical frequency is former
The requisite instrument such as secondary clock.Hall professor (J.L.Hall) of USA National Institute of Standard and Technology in 2005 and Germany horse
General quantum optices prosperous teaching award (T.W.Hansch) because the outstanding contribution of optical frequency com being obtained jointly 2005 annual promises
Bel's PHYSICS.At present the producing method of optical frequency com mainly has two kinds: optical frequency com based on mode-locked laser with
Micro-nano Ke Er frequency comb based on parametric process.The former small product size is huge, system complex, and repetition rate is low, only up to megahertz
Hereby.The latter uses continuous tunable frequency-stabilized laser pumping to fill the optical micro/nano resonator cavity of third-order non-linear medium, by cascade
Four-wave mixing effect ultimately forms optical frequency frequency comb.Compared with frequency comb based on mode-locked laser, based on parametric process
Micro-nano Ke Er frequency comb has that volume is little and the advantage such as CMOS technology compatibility, low energy consumption.
Extremely complex non-linear phenomena is had, such as soliton state, bistable state, figure spirit state, chaos state etc. in Ke Er microcavity.And locate
Frequency comb in soliton state is favored by people with its good characteristic.See in time domain, arteries and veins can be kept through long range propagation
Rush shape invariance thus can be applicable in distance coherent optical communication system, frequency domain then shows as wide range, Low phase noise, frequency spectrum light
Slide and between spectral line, there is good coherence.2010, Leo et al. observed soliton first in optical fiber cavity.Connect down
In coming several years, there is the most again group to carry out pumping micro-nano resonator cavity by tunable laser frequency sweep thus obtained soliton, and
On the impact of frequency comb performance, experimentation has been carried out with regard to high-order dispersion, Raman effect etc..Period is about the product of orphan's frequency comb
Raw and develop and also have substantial amounts of theoretical research, mainly there is non-linear coupling for describe frequency comb evolutionary process in micro-nano resonator cavity
Matched moulds and two kinds of theoretical models of non-linear Lugiato-Lefever.Each corresponding one of each pattern in nonlinear coupling mode model
Describe its equation developed, and each equation is coupled together further through the item describing four-wave mixing effect.Four-wave mixing coupling terms
Existence the time of the numerical computations equation is directly proportional to the cube of microcavity pattern count, therefore emulate hundreds and thousands of moulds
During the evolution of formula, this describing mode of nonlinear coupling mode model just seems extremely inefficient.With nonlinear coupling mode equations phase
Ratio, the non-linear Lugiato-that at numerical computations simultaneous non-linear Schrodinger equation and resonator cavity coupling, boundary condition is derived
Lefever model then can be efficiently a lot, and the most non-linear Lugiato-Lefever model is widely used in the various character of frequency comb
In theory analysis.
Once the size of micro-nano resonator cavity determines, its free spectrum width free spectral range (FSR) determines that,
And the spectral line of frequency comb is spaced apart the integral multiple of FSR.Had at present orphan's frequency comb produce with the theory analysis developed and
Experimental result, orphan's frequency comb separation of spectra of generation is FSR.But actual application typically requires to obtain spectral line interval adjustable
Orphan's frequency comb, the most traditional tunable laser pumping micro-nano resonator cavity scheme cannot meet demand.And use doubly-linked
Continuous optical pumping resonator cavity makes the adjustable orphan's frequency comb in generation spectral line interval be possibly realized.
Currently mainly use tunable laser pump cavity, simultaneously by tunable laser at resonant wavelength
Neighbouring frequency sweep continuously produces orphan's frequency comb.But sweep rate is most important when adopting in this way, too fast or the slowest
Frequency comb will be caused to miss orphan region.Even if create orphan's frequency comb simultaneously, the number of orphan and position also cannot lead to
Cross this regulative mode to control.Test of many times both domestic and external prove by regulation double pumping action optical wavelength spacing by the way of thus realize right
The regulation of frequency comb separation of spectra is practicable, however current existing double pumping action light source package only to create spacing adjustable
Frequency comb, do not obtain performance more preferable orphan frequency comb.The most universal orphan's frequency comb produces system and all uses list
One tunable optical source, is obtained by frequency sweep continuous near resonant wavelength, and sweep rate is required high by this scheme,
Frequency sweep is too fast or excessively all cannot form orphan's frequency comb slowly.
Through retrieval, Publication No. CN105680301A, the Chinese invention application of CN Application No. 201610144450.7, it is somebody's turn to do
The frequency comb at a kind of adjustable frequency based on micro-ring resonant cavity of disclosure of the invention interval produces system and method, it is intended to solve existing light
It is poor that frequency comb produces system stability, and the frequency interval of frequency comb is fixed or only adjustable fraud in several Free Spectral Ranges
End.This system by optical amplifier, optoisolator, Polarization Controller, upload/download type micro-ring resonant cavity, beam splitter and
The optic fiber ring-shaped cavity of the Guan Bi that adjustable double wavelength filter is formed by single-mode fiber series connection；Wherein, swash along fiber annular intracavity
The propagation path of optical signal, beam splitter be positioned at upload/download type micro-ring resonant cavity after.
But: above-mentioned patent only proposes the generation scheme of the adjustable frequency comb of spacing, it is impossible to be applied to frequency comb stable
Property require higher field.
Summary of the invention
For defect of the prior art, it is an object of the invention to provide a kind of adjustable orphan of spacing based on micro-nano resonator cavity
Sub-frequency comb system and control method, simultaneously improve existing regulation scheme, changes continuous frequency sweep step into twice regulation, thus
Simplify the producing method of orphan's frequency comb.
According to an aspect of the present invention, it is provided that a kind of spacing based on micro-nano resonator cavity adjustable orphan frequency comb system,
Described system includes: the first continuous tunable frequency-stabilized laser, the second continuous tunable frequency-stabilized laser, the first erbium-doped fiber amplifier, the
Two erbium-doped fiber amplifiers, for filtering the first band filter of pump light sideband spurious signal, the second band filter, the
One bonder, the second bonder, a micro-nano resonator cavity, a bragg grating filtering pump light signals, light electrical resistivity survey
Survey device, for analyzing the spectroanalysis instrument of spectral characteristic, and the electric spectrometer of the signal of telecommunication after analyzing beat frequency；Wherein:
First continuous tunable frequency-stabilized laser sends pump light source, and pump light source is through the first erbium-doped fiber amplifier, the first band
After bandpass filter amplifies filtering, it is coupled to micro-nano resonator cavity through the first input port of the first bonder；
Second continuous tunable frequency-stabilized laser sends pump light source, and pump light source is through the second erbium-doped fiber amplifier, the second band
After bandpass filter amplifies filtering, it is coupled to micro-nano resonator cavity through the second input port of the first bonder；
The outfan of micro-nano resonator cavity connects bragg grating, and bragg grating outfan connects the second coupling
The input port of device, the second bonder has two delivery outlets, and one of them delivery outlet connects spectroanalysis instrument, another one passes through light
Electric explorer connects electricity spectrometer.
Described micro-nano resonator cavity, is used for generating micro-nano Ke Er optical frequency com.
Described Bragg grating, in order to filter strong pump light, prevents pump light disturbance-observer result.
Preferably, described micro-nano resonator cavity is Si prepared by CMOS technology3N4Optical microcavity, beneficially tunable optical source
On sheet integrated.
Preferably, described photodetector is made up of photodiode.
According to another aspect of the present invention, it is provided that a kind of spacing based on micro-nano resonator cavity adjustable orphan frequency comb system
Control method, described method use two continuous tunable frequency-stabilized laser as pump light source, after the amplified filtering of pump light source
Be coupled to micro-nano resonator cavity, regulate pump light source in three steps, by control two pump light source frequency differences thus realize right
The control of orphan's frequency comb separation of spectra；
The first step, determines resonant wave-length coverage: use single light source to amplify pumping micro-nano resonator cavity after filtering, find
Pump light can be coupled into the wave-length coverage of micro-nano resonator cavity, and determines that orphan produces the wavelength model of the bistable region of correspondence
Enclose；
Second step, single light source pump cavity produces frequency comb: be the micro-nano resonance under first step surveying record with wavelength
The single light source pump cavity of respective value when intracavity power starts to increase, thus produce optical frequency com；
3rd step, the generation of orphan's frequency comb that spacing is tunable: the wavelength of second step single light source is adjusted to bistable region
Corresponding wavelength, is simultaneously introduced wavelength and is less than another light source at the free spectrum width of this light source N times, and the two is commonly coupled to resonator cavity
In, progressively develop and orphan's frequency comb；When pump light source frequency interval is N times of free spectrum width, between the spectral line of orphan's frequency comb
Every being also accordingly N times of free spectrum width.
Further, the described first step, determine resonant wave-length coverage:
The first continuous tunable frequency-stabilized laser is selected to amplify through the first erbium-doped fiber amplifier and pass through the first band filter
The first input port of the first bonder is entered, the second continuous tunable frequency-stabilized laser no signal input the after filtering sideband spurious signal
One bonder, then the continuous light of the first bonder delivery outlet is coupled to micro-nano resonator cavity, a part of light letter in micro-nano resonator cavity
Number exported by coupling aperture, enter after bragg grating filters the strong pump light signals being mingled with spectroanalysis instrument with point
The production of analysis frequency comb, by the first tunable laser frequency sweep, observes output situation of change, and output is not zero
Time explanation resonance wavelength in this wave band, find the pump wavelength scope that bistable region is corresponding simultaneously.
Further, described second step, single light source pump cavity generation frequency comb:
The micro-nano resonator cavity internal power being set under first step surveying record by the wavelength of the first continuous tunable frequency-stabilized laser is opened
Corresponding pumping wavelength when beginning to increase, amplifies through the first erbium-doped fiber amplifier and to filter sideband by the first band filter miscellaneous
Entering the first bonder, then the delivery outlet entrance micro-nano resonator cavity through the first bonder after scattered signal, the second continuously adjustable swashs
Light device no signal inputs, and the coupled mouth of a part of signal in micro-nano resonator cavity is extracted and filtered through bragg grating
Enter spectroanalysis instrument after strong pump light and observe spectrum, observe the optical frequency com characteristic that this step produces.
Further, the generation of described 3rd step, spacing is tunable orphan's frequency comb:
First continuous tunable frequency-stabilized laser power is constant, by the bistable region that records in wavelength convert to the first step
Value, is next set to the second continuous tunable frequency-stabilized laser wavelength deviate the first continuous tunable frequency-stabilized laser wavelength N times and freely composes
At Kuan, two bundle continuous lights amplify and through the first band respectively through the first erbium-doped fiber amplifier, the second erbium-doped fiber amplifier
After bandpass filter, the second band filter filter sideband spurious signal, by the first input port of the first bonder, the second input
Mouth enters the first bonder, and the delivery outlet output signal of the first bonder is coupled to micro-nano resonator cavity by optical fiber, then by one
In dividing micro-nano resonator cavity, signal is coupled out, and filters strong pump light rear portion by the second coupling through bragg grating
First delivery outlet of clutch enters spectroanalysis instrument to observe orphan's frequency comb of formation, another part by the second bonder
Second delivery outlet observes beat signal by electricity spectrometer after entering photodetector beat frequency, thus obtains separation of spectra.
Further, in the described first step:
First by tunable laser wavelength from little toward big regulation, by spectroanalysis instrument record micro-nano resonator cavity internal power
Changing condition, observes when power incrementally increases, and illustrates that the wavelength of pump light is near micro-nano resonant wavelength；
Next by pump wavelength from big toward minor adjustment, comprehensive twice regulating step, finds bistable region corresponding
Pump wavelength scope.
Compared with prior art, the present invention has a following beneficial effect:
The spacing adjustable orphan frequency comb that the present invention proposes has that characteristic of making an uproar mutually is more excellent, phase place is strictly locked between spectral line
The advantages such as fixed, frequency spectrum is wider, these features make to present invention can apply to field higher to frequency comb stability requirement.Simultaneously
The system structure of the present invention is simpler, it is not necessary to peripheral Guan Bi optic fiber ring-shaped cavity, and operation is simple and reliable in regulation.
The present invention uses the method for co-continuous optical pumping micro-nano resonator cavity obtain spacing adjustable orphan frequency comb, do not deposit
In the problem of sweep rate, and have only to three steps and i.e. can get spacing adjustable orphan frequency comb, it is not necessary to consider pumping light wave
The problem of long regulations speed.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
Fig. 1 is one embodiment of the invention spacing based on micro-nano resonator cavity adjustable orphan frequency comb system schematic；
In figure: first continuous tunable frequency-stabilized laser the 1, second continuous tunable frequency-stabilized laser the 2, first erbium-doped fiber amplifier 3,
Second erbium-doped fiber amplifier the 4, first band filter the 5, second band filter the 6, first bonder the 7, second bonder 8,
Micro-nano resonator cavity 9, bragg grating 10, photodetector 11, the spectroanalysis instrument 12 of analysis spectral characteristic, analysis beat frequency
The electric spectrometer 13 of the rear signal of telecommunication.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into the present invention
Protection domain.
As it is shown in figure 1, a kind of spacing based on micro-nano resonator cavity adjustable orphan frequency comb system, described system is by first even
Continuous tunable laser the 1, second continuous tunable frequency-stabilized laser the 2, first erbium-doped fiber amplifier the 3, second erbium-doped fiber amplifier
4, two filter first band filter the 5, second band filter the 6, first bonder 7 of pump light sideband spurious signal,
Two bonder 8, micro-nano resonator cavitys 9, filter the bragg grating 10 of pump light signals, photodiode composition
Photodetector 11, analyze the spectroanalysis instrument 12 of spectral characteristic and analyze the electric spectrometer 13 groups of the signal of telecommunication after beat frequency
Become.Micro-nano resonator cavity 9 uses Si prepared by CMOS technology3N4Optical micro/nano resonator cavity.Wherein:
First continuous tunable frequency-stabilized laser 1 sends pump light source, and pump light source is through the first erbium-doped fiber amplifier 3, first
After band filter 5 amplifies filtering, it is coupled to micro-nano resonator cavity 9 through the first input port of the first bonder 7；
Second continuous tunable frequency-stabilized laser 2 sends pump light source, and pump light source is through the second erbium-doped fiber amplifier 4, second
After band filter 6 amplifies filtering, it is coupled to micro-nano resonator cavity 9 through the second input port of the first bonder 7；
The outfan of micro-nano resonator cavity 9 connects bragg grating 10, and bragg grating 10 outfan connects the
The input port of two bonders 8, the second bonder 8 has two delivery outlets, and one of them delivery outlet connects spectroanalysis instrument 12, additionally
One connects electricity spectrometer 13 by photodetector 11.
Described micro-nano resonator cavity 9, is used for generating micro-nano Ke Er optical frequency com.
Described Bragg grating 10, in order to filter strong pump light, prevents pump light disturbance-observer result.
In one embodiment, described micro-nano resonator cavity 9 uses third-order non-linear medium to prepare, by non-linear microcavity parameter
Process, first excites degeneration four-wave mixing effect, two pump photons to produce an idle light and a flashlight, generate
Idle light and flashlight again carry out degeneration four-wave mixing and nondegenerate two-photon process effect, by that analogy, level quarter ripple mixes
Frequently effect ultimately generates micro-nano Ke Er optical frequency com.
Use said system, the control method of orphan's frequency comb that spacing based on micro-nano resonator cavity is adjustable, be carried out in three steps:
The first step, determine resonant wave-length coverage:
Single tunable laser that is first continuous tunable frequency-stabilized laser 1 is selected to set an input power, through the first er-doped
After fiber amplifier 3 amplifies and filters sideband signals, entering the first input port of the first bonder 7, the second continuously adjustable swashs
Light device 2 power is zero, and the optical signal of the first bonder 7 output is coupled in micro-nano resonator cavity 9, a part in micro-nano resonator cavity 9
The pump light signals that signal is coupled out and is introduced in micro-nano resonator cavity 9, is filtered by force by bragg grating 10 together
After strong pump light signals, enter spectroanalysis instrument 12 and observe signal in micro-nano resonator cavity 9: first by the first continuously adjustable laser
Device 1 wavelength, from little toward big regulation, recorded the changing condition of micro-nano resonator cavity 9 internal power, observes merit by spectroanalysis instrument 12
When rate incrementally increases, illustrate that the wavelength of pump light is near micro-nano resonator cavity 9 resonance wavelength；Next by pump wavelength by greatly
Toward minor adjustment, comprehensive twice regulating step, find the pump wavelength scope that bistable region is corresponding；
Second step, single light source pump cavity generation frequency comb:
Selecting the first continuous tunable frequency-stabilized laser 1 to set an input power, it is micro-that wavelength is set under first step surveying record
Resonator cavity 9 internal power of receiving starts pumping wavelength corresponding when increasing, and pump light amplifies also through the first erbium-doped optical fiber amplifier EDFA
The first input port of the first bonder 1, the second continuously adjustable is entered after the first band filter 5 filters sideband spurious signal
Laser instrument 2 power is zero, and the output signal of the first bonder 7 is coupled into micro-nano resonator cavity 9, a part in micro-nano resonator cavity 9
Signal enters light Bragg grating 10, light Bragg grating with the pump light signals being not coupled in micro-nano resonator cavity 9
10 filter entrance spectroanalysis instrument 12 after strong pump light signals, observe the optical frequency com characteristic that this step produces；
3rd step, the generation of spacing is tunable orphan's frequency comb:
The power of the first continuous tunable frequency-stabilized laser 1 keeps constant, and wavelength is adjusted in the first step record bistable region
Value, the second continuous tunable frequency-stabilized laser 2 power is set to 1/10th of the first continuous tunable frequency-stabilized laser 1 power, and wavelength is little
Value in the first continuous tunable frequency-stabilized laser 1 N times of FSR of wavelength；Two continuous lights are respectively through the first erbium-doped fiber amplifier 3, second
Erbium-doped fiber amplifier 4 is combined into a road by the first bonder 7 after amplifying and filtering sideband spurious signal, the first bonder 7
The signal of merging is coupled into micro-nano resonator cavity 9 by delivery outlet, and in micro-nano resonator cavity 9, a part of signal is coupled to micro-nano resonator cavity
Outside 9, jointly enter bragg grating 10 with the double pump signal not being coupled into micro-nano resonator cavity 9, filter strong pump light
Signal after enter the second bonder 8, enter the first output by the second bonder 8 of a part of signal of the second bonder 8
The frequency comb produced observed by mouth entrance spectroanalysis instrument 12, and the shape of orphan frequency comb i.e. be can be observed through evolution after a while
Become；Another part signal entering the second bonder 8 is clapped by the second delivery outlet entrance photodetector 11 of the second bonder 8
After Pin, the signal of telecommunication obtained being accessed electricity spectrometer 13, the frequency comb separation of spectra of generation is electricity spectrometer 13 and observes
The radio frequency signal frequency arrived；
The spectral line interval producing orphan's frequency comb can be realized regulation by revising the wavelength interval of two pump light sources, when
When pump light source frequency interval is N times of FSR, the spectral line interval of orphan's frequency comb is also N times of FSR accordingly.
The present invention can produce separation of spectra adjustable orphan frequency comb, it is not necessary to the problem considering pump wavelength regulations speed.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, this not shadow
Ring the flesh and blood of the present invention.
Claims (9)
1. spacing based on a micro-nano resonator cavity adjustable orphan frequency comb system, it is characterized in that, described system includes: first
Continuous tunable frequency-stabilized laser, the second continuous tunable frequency-stabilized laser, the first erbium-doped fiber amplifier, the second erbium-doped fiber amplifier,
For filtering the first band filter of pump light sideband spurious signal, the second band filter, the first bonder, the second coupling
Device, micro-nano resonator cavity, one filter the bragg grating of pump light signals, photodetector, for analyzing spectrum
The spectroanalysis instrument of characteristic and after analyzing beat frequency the electric spectrometer of the signal of telecommunication；Wherein:
First continuous tunable frequency-stabilized laser sends pump light source, and pump light source is through the first erbium-doped fiber amplifier, the first logical filter of band
After ripple device amplifies filtering, it is coupled to micro-nano resonator cavity through the first input port of the first bonder；
Second continuous tunable frequency-stabilized laser sends pump light source, and pump light source is through the second erbium-doped fiber amplifier, the second logical filter of band
After ripple device amplifies filtering, it is coupled to micro-nano resonator cavity through the second input port of the first bonder；
The outfan of micro-nano resonator cavity connects bragg grating, and bragg grating outfan connects the second bonder
Input port, the second bonder has two delivery outlets, and one of them delivery outlet connects spectroanalysis instrument, another one by light electrical resistivity survey
Survey device and connect electricity spectrometer.
The regulation side of a kind of spacing based on micro-nano resonator cavity the most according to claim 1 adjustable orphan frequency comb system
Method, it is characterised in that described micro-nano resonator cavity uses third-order non-linear medium to prepare, by non-linear microcavity parametric process, first
First exciting degeneration four-wave mixing effect, two pump photons produce idle light and a flashlight, the idle light of generation and
Flashlight carries out degeneration four-wave mixing and nondegenerate two-photon process effect again, and by that analogy, cascade four-wave mixing effect is final
Generate micro-nano Ke Er optical frequency com.
The regulation side of a kind of spacing based on micro-nano resonator cavity the most according to claim 2 adjustable orphan frequency comb system
Method, it is characterised in that described micro-nano resonator cavity is Si prepared by CMOS technology3N4Optical microcavity.
4. according to a kind of based on micro-nano resonator cavity the spacing adjustable orphan frequency comb system described in any one of claim 1-3,
It is characterized in that, described photodetector is made up of photodiode.
5. the control method of the adjustable orphan's frequency comb of spacing based on micro-nano resonator cavity, it is characterised in that described method is adopted
With two continuous tunable frequency-stabilized laser as pump light source, after the amplified filtering of pump light source, it is coupled to micro-nano resonator cavity, divides three
Individual step regulation pump light source, realizes the control to orphan's frequency comb separation of spectra by controlling two pump light source frequency differences
System；
The first step, determines resonant wave-length coverage: use single light source to amplify pumping micro-nano resonator cavity after filtering, find pumping
Light can be coupled into the wave-length coverage of micro-nano resonator cavity, and determines that orphan produces the wave-length coverage of the bistable region of correspondence；
Second step, single light source pump cavity produces frequency comb: in being the micro-nano resonator cavity under first step surveying record with wavelength
The single light source pump cavity of respective value when power starts to increase, thus produce optical frequency com；
3rd step, the generation of orphan's frequency comb that spacing is tunable: the wavelength of second step single light source is adjusted to bistable region corresponding
Wavelength, is simultaneously introduced wavelength and is less than another light source at the free spectrum width of this light source N times, and the two is commonly coupled in resonator cavity, by
Step develops and orphan's frequency comb；When pump light source frequency interval is N times of free spectrum width, the spectral line interval of orphan's frequency comb is corresponding
Also it is N times of free spectrum width.
The control method of the adjustable orphan's frequency comb of spacing based on micro-nano resonator cavity the most according to claim 5, its feature
It is, the described first step, specific as follows:
Select the first continuous tunable frequency-stabilized laser to amplify through the first erbium-doped fiber amplifier, and filtered by the first band filter
Entering the first input port of the first bonder after sideband spurious signal, the second continuous tunable frequency-stabilized laser no signal inputs the first coupling
Clutch, then the continuous light of the first bonder delivery outlet is coupled to micro-nano resonator cavity, in micro-nano resonator cavity, a part of optical signal leads to
Overcoupling mouth exports, and enters spectroanalysis instrument to analyze light after bragg grating filters the strong pump light signals being mingled with
The production of frequency comb, by the first tunable laser frequency sweep, observes output situation of change, says when output is not zero
Bright resonance wavelength, in this wave band, finds the pump wavelength scope that bistable region is corresponding simultaneously.
The control method of the adjustable orphan's frequency comb of spacing based on micro-nano resonator cavity the most according to claim 6, its feature
It is, described second step, particularly as follows:
The micro-nano resonator cavity internal power being set under first step surveying record by the wavelength of the first continuous tunable frequency-stabilized laser starts to increase
Pumping wavelength corresponding time big, is amplified through the first erbium-doped fiber amplifier and is filtered the spuious letter of sideband by the first band filter
The first bonder, then the delivery outlet entrance micro-nano resonator cavity through the first bonder, the second continuous tunable frequency-stabilized laser is entered after number
No signal inputs, and the coupled mouth of a part of signal in micro-nano resonator cavity is extracted and filtered strongly through bragg grating
Pump light after enter spectroanalysis instrument observe spectrum, observe this step produce optical frequency com characteristic.
The control method of the adjustable orphan's frequency comb of spacing based on micro-nano resonator cavity the most according to claim 7, its feature
It is, described 3rd step, particularly as follows:
First continuous tunable frequency-stabilized laser power is constant, the value of bistable region that will record in wavelength convert to the first step, connects
Get off and be set to the second continuous tunable frequency-stabilized laser wavelength deviate at N times of free spectrum width of the first continuous tunable frequency-stabilized laser wavelength,
Two bundle continuous lights amplify and through the first logical filter of band respectively through the first erbium-doped fiber amplifier, the second erbium-doped fiber amplifier
After ripple device, the second band filter filter sideband spurious signal, entered by the first input port of the first bonder, the second input port
Entering the first bonder, the delivery outlet output signal of the first bonder is coupled to micro-nano resonator cavity by optical fiber, then by a part of micro-
Signal in resonator cavity of receiving is coupled out, and filters strong pump light rear portion by the second bonder through bragg grating
First delivery outlet enter spectroanalysis instrument with observe formed orphan's frequency comb, another part by the second bonder second
Delivery outlet observes beat signal by electricity spectrometer after entering photodetector beat frequency, thus obtains separation of spectra.
9. according to a kind of based on micro-nano resonator cavity the spacing adjustable orphan frequency comb system described in any one of claim 5-8,
It is characterized in that, in the described first step:
First by tunable laser wavelength from little toward big regulation, by the change of spectroanalysis instrument record micro-nano resonator cavity internal power
Situation, observes when power incrementally increases, and illustrates that the wavelength of pump light is near micro-nano resonant wavelength；
Next by pump wavelength from big toward minor adjustment, comprehensive twice regulating step, finds the pumping that bistable region is corresponding
Optical wavelength range.
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