CN108390249A - Dynamic Q-modulating device based on photon crystal micro cavity and method - Google Patents
Dynamic Q-modulating device based on photon crystal micro cavity and method Download PDFInfo
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- CN108390249A CN108390249A CN201810487958.6A CN201810487958A CN108390249A CN 108390249 A CN108390249 A CN 108390249A CN 201810487958 A CN201810487958 A CN 201810487958A CN 108390249 A CN108390249 A CN 108390249A
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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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/115—Q-switching using intracavity electro-optic devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses the dynamic Q-modulating devices based on photon crystal micro cavity, including tunable wave length pulse laser, p i n knot electrooptic modulators and photon crystal micro cavity waveguiding structure；The photon crystal micro cavity waveguiding structure is made of front side photonic crystal waveguide, multimode photon crystal micro cavity, rear side photonic crystal waveguide；The front side photonic crystal waveguide is located at the left side of multimode photon crystal micro cavity, and rear side photonic crystal waveguide is located at the right side of multimode photon crystal micro cavity.The invention also discloses the dynamic Q-regulating methods based on photon crystal micro cavity.The configuration of the present invention is simple, it is easily achieved and integrates, the resonant frequency and Q value sizes that low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold can be freely manipulated by the Fine design of shape, structure and size to multimode photon crystal micro cavity make multimode photon crystal micro cavity have larger dynamic tune Q ranges and larger bandwidth of operation.
Description
Technical field
The present invention relates to photon crystal micro cavities, more particularly to dynamic Q-modulating device and method based on photon crystal micro cavity.
Background technology
High q-factor microcavity due to can light for a long time local in the short space of sub-wavelength magnitude so that intracavitary light with
Matter interaction greatly enhances, thus is had a wide range of applications in fields such as all-optical switch, optical diode, All Optical Wavelength Conversions
Foreground.In recent years, with the rapid development of micro-nano photon technology, quality factor is more than 105Ultrahigh Q-value microcavity have been carried out.
However, high q-factor microcavity is faced with a basic difficulty：On the one hand, the Q values of microcavity are higher, then storage of the photon in microcavity
Service life is longer；But then, since the corresponding cavity mold line width of high q-factor microcavity is very narrow, allow the pulse for being coupled into microcavity
The bandwidth of signal light is also inevitable very narrow, and the speed for causing signal light to enter and leave high q-factor microcavity is extremely slow (with Q values at anti-
Than), this requirement obviously handled high speed, broadband optical signal is unfavorable.
The key to solve the above problems is that dynamic adjusts Q：First, microcavity is adjusted to relatively low Q state of value, had to allow
The pulse light of large bandwidth is from waveguide quick coupling into microcavity, and microcavity is in " ON state " at this time；Then, pulse light is waited for
After microcavity, microcavity is adjusted to ultrahigh Q-value rapidly, allows the signal light of " capture " to be difficult to be overflowed from microcavity, at this time microcavity
In " closed state ", making luminous energy, local is in intracavitary for a long time, to obtain significant light delay, enhances the mutual of light and substance
Effect；When disengagement is required, microcavity is adjusted to low Q state again, the signal light of storage just can be coupled into outgoing from microcavity rapidly
Waveguide.Delay-bandwidth product just can be significantly increased in this way, break through the limitation of contradictory relation between them.However, being realized to microcavity
Significantly dynamic adjusts Q to have comparable difficulty, and current realization means are seldom, mainly by photonic crystal waveguide side
It introduces speculum and is grown with reflecting interference cancellation or mutually by accurate ultrafast phase-modulation control incident light, microcavity is made to exist
Switch between " closed state " and " ON state ", or adiabatic wavelength convert is carried out at the same time by the resonance wavelength to multiple coupled micro-cavities
Similar electromagnetic induced transparency effect is generated to realize.These dynamics adjust the mode of Q, whether the interference effect based on phase-modulation
It answers, or the class electromagnetic induced transparency effect based on more microcavity resonant frequency modulations, involved technology is all sufficiently complex, to reality
It is very harsh to test condition requirement, applies and is also therefore limited to.Therefore, inquire into a kind of more simple and effective dynamic Q-regulating method,
It is particularly significant and crucial to realize that dynamic adjusts Q in single microcavity.
Invention content
In order to overcome the disadvantages mentioned above and deficiency of the prior art, the purpose of the present invention is to provide one kind being based on photonic crystal
The dynamic Q-modulating device of microcavity, has the advantages of simple structure and easy realization and integrates.
Another object of the present invention is to provide a kind of dynamic Q-regulating method based on photon crystal micro cavity has larger band
Wide signal light can rapidly be coupled into microcavity and local is in microcavity for a long time, and fast quick-release when needed
It puts.
The purpose of the present invention is achieved through the following technical solutions：
Dynamic Q-modulating device based on photon crystal micro cavity, including tunable wave length pulse laser, p-i-n junction electric light tune
Device processed and photon crystal micro cavity-waveguiding structure；The tunable wave length pulse laser is for providing incoming signal light；It is described
P-i-n junction electrooptic modulator is used to carry out dynamic modulation to photon crystal micro cavity refractive index；
Photon crystal micro cavity-the waveguiding structure is by front side photonic crystal waveguide, multimode photon crystal micro cavity, rear side photon
Crystal waveguide forms；The front side photonic crystal waveguide is located at the left side of multimode photon crystal micro cavity, rear side photonic crystal waveguide
Positioned at the right side of multimode photon crystal micro cavity；
The photonic crystal constitutes triangular crystal lattice by round airport in silicon materials tablet；The airport it is a diameter of
0.4a, wherein a are the lattice constant of photonic crystal；The thickness of the silicon materials tablet is 0.5a；
The multimode photon crystal micro cavity by removing 6 to 14 airports in the horizontal direction in photonic crystal chip center and
It is formed, including 1 low reactance-resistance ratio cavity mold and 1 ultrahigh Q-value cavity mold, the Q values of the low reactance-resistance ratio cavity mold are less than 15000；The ultrahigh Q-value
Cavity mold Q values are more than 100000；The resonant frequency compared with low reactance-resistance ratio cavity mold is identical as the centre frequency of incident pulse signal light；
The low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold are by by the airport of the multimode photon crystal micro cavity leftmost side and the rightmost side
It is reduced into original 1/2, and respectively moves horizontally a/3 to the left and right sides respectively and is formed.
The front side photonic crystal waveguide round air horizontally arranged by removing 1 row on the left of multimode photon crystal micro cavity
Hole is formed.
The rear side photonic crystal waveguide round air horizontally arranged by removing 1 row on the right side of multimode photon crystal micro cavity
Hole is formed.
The center weight at the center in the refractive index Electro-optical Modulation region of multimode photon crystal micro cavity and multimode photon crystal micro cavity
It closes, the 1/2 of the entire microcavity of modulation areas area covering.
The dynamic tune side Q based on photon crystal micro cavity based on the dynamic Q-modulating device based on photon crystal micro cavity
Method, including tunable wave length pulse laser, p-i-n junction electrooptic modulator and the photon crystal micro cavity-waveguiding structure；
The tunable wave length pulse laser is for providing incoming signal light；The p-i-n junction electrooptic modulator is used for photon crystalline substance
Body microcavity refractive index carries out dynamic modulation.
The resonant frequency for the incident pulse signal light that the tunable wave length pulse laser generates and incident pulse signal
The centre frequency of light is identical.
The frequency of the bandwidth of operation and low reactance-resistance ratio cavity mold of the incident pulse signal light that the tunable wave length pulse laser generates
Domain line width matches.
Based on the dynamic Q-regulating method based on photon crystal micro cavity, include the following steps：
Step 1：Frequency is located at the incident pulse signal light within the scope of photonic band gap and enters from preceding side photonic crystal waveguide
It penetrates；
Step 2：After equal signal lights are coupled into photon crystal micro cavity completely, by p-i-n junction electrooptic modulator to multimode light
The refractive index of sub- crystal microcavity subregion carries out periodical Electro-optical Modulation, and microcavity refractive index is made to generate cyclically-varying, and
Modulating frequency is just set as to the difference of the low reactance-resistance ratio cavity mold of microcavity and the resonant frequency of ultrahigh Q-value cavity mold；In refractive index periodic tune
Under the induction of system, intracavitary signal light energy will periodically be converted at any time between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold, when
When signal light energy is converted to ultrahigh Q-value cavity mold from low reactance-resistance ratio cavity mold completely, p-i-n junction electrooptic modulator is closed, signal light is long
Temporally local is in microcavity；
Step 3：When needing release signal light, then p-i-n junction electrooptic modulator is opened, makes low reactance-resistance ratio cavity mold and superelevation Q
Energy conversion between value cavity mold continues periodically to carry out, when signal light energy is converted to low reactance-resistance ratio from ultrahigh Q-value cavity mold completely
When cavity mold, p-i-n junction electrooptic modulator is closed, realizes the quick release of signal light side photonic crystal waveguide backward.
The principle of the present invention is as follows：A multimode microcavity is designed first, it is made to contain 1 low reactance-resistance ratio cavity mold and 1 superelevation
Q value cavity molds, their resonant frequency are respectively ω1And ω2.Under normal conditions, the two cavity molds are orthogonal, are not had between them
There is any coupling effect, therefore energy is between them without any exchange.But if microcavity refractive index is carried out periodically
Modulation, makes microcavity refractive index change by following rule：
N (r, t)=n0+ Δ n (r) sin (Ω t), (1)
Wherein n0The refractive index of microcavity when for without modulation, Ω=| ω2-ω1| it is the modulating frequency of refractive index, r represents microcavity
Different location in region, t are the modulation time, and Δ n (r) is the modulation amplitude of refractive index of different location in microcavity.By equation (1)
Band people's Maxwell equations, can release under the induction that microcavity refractive index periodic is modulated, low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold
It will couple, signal light energy will periodically switch between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold.At this point, low reactance-resistance ratio chamber
Mould and the normalized energy of ultrahigh Q-value cavity mold, which will press following rule respectively, to be changed：
Wherein K is the coefficient of coup between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold under microcavity refractive index periodic modulation-induced.
By (2) formula and (3) formula it is found that change-over period of the signal light energy between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold isTo ensure that K is not equal to 0, and keep dynamic q-effect optimal, should allow the refractive index of photon crystal micro cavity
Modulation areas accounts for about the 1/2 of entire microcavity, and the center of modulation areas is overlapped with the center of microcavity.
Low reactance-resistance ratio cavity mold by the optimization design to multimode microcavity, the centre frequency and microcavity that can make pulse light is humorous
Vibration frequency is identical, therefore signal light can efficiently, rapidly be coupled into microcavity (coupling speed and Q values are inversely proportional), and allows incident letter
Number light has larger bandwidth of operation.After equal signal lights are coupled into photon crystal micro cavity completely, microcavity is reflected by p-i-n junction
Rate carries out periodical Electro-optical Modulation, and microcavity refractive index is made to generate cyclically-varying by equation (1).In refractive index periodic modulation
Under induction, intracavitary signal light energy will by equation (2) and equation (3) between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold at any time
Between periodically convert.When signal light energy is converted to ultrahigh Q-value cavity mold from low reactance-resistance ratio cavity mold completely, modulation is closed, just can be incited somebody to action
Signal light for a long time local in microcavity.When needing release signal light, then modulation is opened, makes low reactance-resistance ratio cavity mold and ultrahigh Q-value
Energy conversion between cavity mold continues periodically to carry out；When signal light energy is converted to low reactance-resistance ratio chamber from ultrahigh Q-value cavity mold completely
It when mould, closes modulation, just can realize the quick release of signal light (rate of release is inversely proportional with Q values).In this way, just can realize microcavity
Dynamic tune Q.
Compared with prior art, the present invention has the following advantages and beneficial effect：
(1) existing dynamic Q-regulating technique is mainly based upon the interference effect of phase-modulation, or humorous based on more microcavitys
The class electromagnetic induced transparency effect of vibration frequency modulation, involved technology is all sufficiently complex, requires experiment condition very harsh.And
The present invention is without carrying out phase-modulation, without by the class electromagnetic induced transparency effect based on more microcavitys, but only by
Carrying out dynamic modulation to the refractive index of a microcavity can realize that dynamic adjusts Q, have the advantages of simple structure and easy realization and integrate.
(2) existing dynamic Q-regulating technique, the whether interference effect based on phase-modulation, or it is based on more microcavity resonance
Warbled class electromagnetic induced transparency effect is all to irradiate freely carrying for silicon materials surface initiation by applying pulse pump light
Sub- sink effect is flowed, waveguide or microcavity refractive index finely regulating are realized.However, since what is generated in silicon materials freely carries
Flow son dynamic complex, microcavity would become hard to keep high q-factor closed chamber state, signal light local in microcavity time also therefore by
Limitation.In addition, free-carrier Absorption can also bring larger light loss, this will further decrease signal light local in microcavity
Time.And the present invention is then to carry out dynamic Electro-optical Modulation to microcavity refractive index by p-i-n junction, rather than by free carrier
Sink effect, therefore signal light local can be longer in the time of microcavity.
(3) dynamic tune Q of the invention is carried out between the low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold of microcavity using signal light
Dynamic transition is realized.Since the resonant frequency of low reactance-resistance ratio cavity mold is identical as the centre frequency of incident pulse signal light, to make
Signal light can quick coupling enter microcavity and have larger bandwidth of operation, and be based on phase modulation interference effect and class electromagnetism
The bandwidth of operation of the dynamic Q-regulating technique of inducing transparent effect then usual very little.
(4) resonant frequency and Q value sizes corresponding to low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold of the present invention, can be by light
The shape, structure of sub- crystal microcavity and the Fine design of size freely manipulate, so that dynamic adjusts Q to have signal light wavelength
There is a better applicability, and coupling speed, bandwidth of operation and the signal light local of microcavity are passed in and out when microcavity in signal light
Between etc. have stronger controllability, to be more conducive to high speed, broadband all-optical signal processing.
Description of the drawings
Fig. 1 is the composition schematic diagram of the dynamic Q-modulating device based on photon crystal micro cavity of the embodiment of the present invention.
Fig. 2 is the schematic diagram that the realization dynamic of the embodiment of the present invention adjusts photon crystal micro cavity-waveguiding structure of Q.
Fig. 3 is that the realizations signal light efficient coupling of the embodiment of the present invention enters microcavity and long-time is stored in the time domain of microcavity and drills
Change figure.
Fig. 4 is the time domain evolution diagram that the realization signal light of the embodiment of the present invention is discharged in the time arbitrarily needed from microcavity.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, embodiments of the present invention are not limited thereto.
Embodiment 1
Swash as shown in Figure 1, the dynamic Q-modulating device based on photon crystal micro cavity of the present embodiment includes tunable wave length pulse
Light device (Pulse LD) 1, variable optical attenuator (VOA) 2, polarization controller 3, lens fiber 4, photon crystal micro cavity-waveguide junction
Structure 5, p-i-n junction electrooptic modulator (VF) 6, lens fiber 7, spectroanalysis instrument (OSA) 8.
The operation wavelength of tunable wave length pulse laser 1 is continuously adjustable in 1500nm to 1600nm, tuning precision 1MHz,
Pulsewidth is 50ps, repetition rate 350MHz.
As shown in Fig. 2, photon crystal micro cavity-the waveguiding structure 5 of the present embodiment by 32 × 17 round airport in silicon material
Triangular crystal lattice is constituted in material tablet, is arranged along x/y plane.Air bore dia d=0.4a, wherein a=420nm are photonic crystal
Lattice constant.The refractive index of silicon materials tablet is 3.4, thickness (perpendicular to x/y plane) h=0.5a.Photon crystal micro cavity-waveguide
Structure 5 is made of front side photonic crystal waveguide 9, photon crystal micro cavity 10, rear side photonic crystal waveguide 11.The multimode photon is brilliant
Body microcavity 10 is removed 1 row airport (totally 8) and is formed in the horizontal direction by entreating in the photonic crystal, chamber each side by
The airport of two a diameter of 0.4a constitutes the cavity wall of resonant cavity；Close to two air of the microcavity leftmost side of cavity wall and the rightmost side
Kong Jun is reduced into original 1/2, and respectively moves horizontally a/3 to the left and right sides respectively, just can form a low reactance-resistance ratio chamber in this way
Mould (Q=10800) and a ultrahigh Q-value cavity mold (Q=126500), resonant frequency be respectively 0.27081 (2 π c/a) and
0.27078 (2 π c/a), c are the speed of light in a vacuum.The front side photonic crystal waveguide 9 is located at multimode photon crystal micro cavity
10 left side, rear side photonic crystal waveguide 11 are located at the right side of multimode photon crystal micro cavity 10.Front side photonic crystal waveguide 9, after
Side photonic crystal waveguide 11 by removing the horizontally arranged round airport of 1 row respectively at left and right sides of multimode photon crystal micro cavity and
It is formed.The center in microcavity refractive index Electro-optical Modulation region 12 is overlapped with the center of multimode photon crystal micro cavity, modulation areas area
Cover the 1/2 of entire microcavity.
The dynamic Q-regulating method based on photon crystal micro cavity of the present embodiment, includes the following steps：
The first step：Photon crystal micro cavity shape, size and structure are optimized, on photonic crystal chip center edge
Horizontal direction removes 8 airports and forms multimode photon crystal micro cavities, chamber each side by the sky of two a diameter of 0.4a
Stomata constitutes the cavity wall of resonant cavity；Then original will be reduced into close to two airports of the microcavity leftmost side of cavity wall and the rightmost side
1/2 come, and respectively move horizontally a/3 to the left and right sides respectively, one just can be formed in this way compared with low reactance-resistance ratio cavity mold (Q=
10800) with a ultrahigh Q-value cavity mold (Q=126500), resonant frequency is respectively ω1=0.27081 (2 π c/a) and ω2=
0.27078(2πc/a)。
Second step：Tunable wave length pulse laser 1 is opened, its centre wavelength is adjusted to 1550nm, adjusts and can be changed light decay
Subtract device 2 and its power is adjusted to 1 milliwatt, and enables the electric field polarization of tunable wave length pulse laser 1 along flat using Polarization Controller 3
Row is in x/y plane direction (i.e. H mode, TE polarizations).As shown in Figure 1, the signal light warp that tunable wave length pulse laser 1 is sent out
Front side photonic crystal waveguide 9 is injected along 2 dimensional photonic crystal planes (i.e. the faces xy) after the focusing of lens fiber 4, and is coupled into multimode light
Sub- crystal microcavity 10.
Third walks：After equal signal lights are coupled into multimode photon crystal micro cavity completely, p-i-n junction electrooptic modulator is opened, and
Modulating frequency is set as Ω=ω1-ω2, microcavity refractive index is made to generate cyclically-varying by equation (1).In refractive index periodic tune
Under the induction of system, intracavitary signal light energy will periodically be converted at any time between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold,
The change-over period is 9ps in the present embodiment.After time t is the change-over period of 1/2 (or 1/2 odd-multiple), signal luminous energy
Amount will be converted to ultrahigh Q-value cavity mold from low reactance-resistance ratio cavity mold completely.At this point, p-i-n junction electrooptic modulator is closed, it just can be by signal light
For local in microcavity, the signal light power exported at this time is almost 0 for a long time, as shown in figure 3, wherein 13 be closing p-i-n
Tie the time point of electrooptic modulator.
4th step：When needing release signal light at the time of arbitrary required, then p-i-n junction electrooptic modulator is opened, such as
(wherein 14 signal arbitrarily to be chosen in the present embodiment intends release time point) shown in Fig. 4, makes low reactance-resistance ratio cavity mold and ultrahigh Q-value chamber
Energy conversion between mould continues periodically to carry out.When signal light energy is converted to low reactance-resistance ratio cavity mold from ultrahigh Q-value cavity mold completely
When, p-i-n junction electrooptic modulator is closed, closes in the time point such as Fig. 4 of p-i-n junction electrooptic modulator shown in 15, just can in this way
Realize that signal light, to 11 quick release of rear side photonic crystal waveguide, is connect after lens fiber 7 by spectroanalysis instrument 10 in 25ps
It receives.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (7)
1. the dynamic Q-modulating device based on photon crystal micro cavity, which is characterized in that including tunable wave length pulse laser, p-i-n
Tie electrooptic modulator and photon crystal micro cavity-waveguiding structure；The tunable wave length pulse laser is for providing incident letter
Number light；The p-i-n junction electrooptic modulator is used to carry out dynamic modulation to photon crystal micro cavity refractive index；
Photon crystal micro cavity-the waveguiding structure is by front side photonic crystal waveguide, multimode photon crystal micro cavity, rear side photonic crystal
Waveguide forms；The front side photonic crystal waveguide is located at the left side of multimode photon crystal micro cavity, and rear side photonic crystal waveguide is located at
The right side of multimode photon crystal micro cavity；
The photonic crystal constitutes triangular crystal lattice by round airport in silicon materials tablet；The airport it is a diameter of
0.4a, wherein a are the lattice constant of photonic crystal；The thickness of the silicon materials tablet is 0.5a；
The multimode photon crystal micro cavity by removing 6 to 14 airports and shape in the horizontal direction in photonic crystal chip center
At including 1 low reactance-resistance ratio cavity mold and 1 ultrahigh Q-value cavity mold, the Q values of the low reactance-resistance ratio cavity mold are less than 15000；The ultrahigh Q-value chamber
Mould Q values are more than 100000；The resonant frequency compared with low reactance-resistance ratio cavity mold is identical as the centre frequency of incident pulse signal light；
The low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold are by reducing the airport of the multimode photon crystal micro cavity leftmost side and the rightmost side
It is original 1/2, and respectively moves horizontally a/3 to the left and right sides respectively and formed.
2. the dynamic Q-modulating device according to claim 1 based on photon crystal micro cavity, which is characterized in that the front side light
Sub- crystal waveguide is formed by removing the horizontally arranged round airport of 1 row on the left of multimode photon crystal micro cavity.
3. the dynamic Q-modulating device according to claim 1 based on photon crystal micro cavity, which is characterized in that the rear side light
Sub- crystal waveguide is formed by removing the horizontally arranged round airport of 1 row on the right side of multimode photon crystal micro cavity.
4. the dynamic Q-modulating device according to claim 1 based on photon crystal micro cavity, which is characterized in that multimode photon is brilliant
The center in the refractive index Electro-optical Modulation region of body microcavity is overlapped with the center of multimode photon crystal micro cavity, modulation areas area covering
The 1/2 of entire microcavity.
5. the dynamic Q-modulating device according to claim 1 based on photon crystal micro cavity, which is characterized in that the wavelength can
The resonant frequency for tuning the incident pulse signal light that pulse laser generates is identical as the centre frequency of incident pulse signal light.
6. the dynamic Q-modulating device according to claim 1 based on photon crystal micro cavity, which is characterized in that the wavelength can
The bandwidth of operation of incident pulse signal light that tuning pulse laser generates matches with the frequency domain line width of low reactance-resistance ratio cavity mold.
7. the dynamic Q-regulating method of the dynamic Q-modulating device based on photon crystal micro cavity based on claim 1~6 any one of them,
It is characterized by comprising the following steps：
Step 1：Frequency is located at the incident pulse signal light within the scope of photonic band gap from the incidence of preceding side photonic crystal waveguide；
Step 2：It is brilliant to multimode photon by p-i-n junction electrooptic modulator after equal signal lights are coupled into photon crystal micro cavity completely
The refractive index of body microcavity subregion carries out periodical Electro-optical Modulation, so that microcavity refractive index is generated cyclically-varying, and will adjust
Frequency processed is just set as the difference of the low reactance-resistance ratio cavity mold of microcavity and the resonant frequency of ultrahigh Q-value cavity mold；In refractive index periodic modulation
Under induction, intracavitary signal light energy will periodically be converted at any time between low reactance-resistance ratio cavity mold and ultrahigh Q-value cavity mold, work as signal
When light energy is converted to ultrahigh Q-value cavity mold from low reactance-resistance ratio cavity mold completely, p-i-n junction electrooptic modulator is closed, for a long time by signal light
Ground local is in microcavity；
Step 3：When needing release signal light, then p-i-n junction electrooptic modulator is opened, makes low reactance-resistance ratio cavity mold and ultrahigh Q-value chamber
Energy conversion between mould continues periodically to carry out, when signal light energy is converted to low reactance-resistance ratio cavity mold from ultrahigh Q-value cavity mold completely
When, p-i-n junction electrooptic modulator is closed, realizes the quick release of signal light side photonic crystal waveguide backward.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152060A (en) * | 2020-10-30 | 2020-12-29 | 电子科技大学 | Photonic crystal micro laser resonant cavity based on Brewster angle |
| CN113658613A (en) * | 2021-07-08 | 2021-11-16 | 华南理工大学 | Controllable optical storage device and method based on photonic crystal dynamic microcavity |
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| CN112152060A (en) * | 2020-10-30 | 2020-12-29 | 电子科技大学 | Photonic crystal micro laser resonant cavity based on Brewster angle |
| CN113658613A (en) * | 2021-07-08 | 2021-11-16 | 华南理工大学 | Controllable optical storage device and method based on photonic crystal dynamic microcavity |
| CN113658613B (en) * | 2021-07-08 | 2022-04-22 | 华南理工大学 | Controllable optical storage device and method based on photonic crystal dynamic microcavity |
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