CN114006659B - High-order vector soliton generation system and method based on passive resonant cavity - Google Patents

Abstract

The invention relates to the field of light pulse output, and provides a high-order vector soliton generation system and method based on a passive resonant cavity, wherein the system comprises the following steps: the system comprises a continuous wave pump source, a first polarization controller, a first polarization beam splitter, a first modulator, a first mode generator, a second modulator, a second mode generator, a polarization beam combiner, a coupler, a second polarization controller, a third polarization controller and a second polarization beam splitter. The invention provides a new idea for generating the high-order vector solitons by generating the high-order vector solitons based on the passive resonant cavity.

Description

High-order vector soliton generation system and method based on passive resonant cavity

technical field

The invention relates to the field of optical pulse output, in particular to a high-order vector soliton generation system and method based on a passive resonant cavity.

Background technique

A vector soliton refers to a soliton that has multiple soliton components and each soliton component is coupled together and propagates in the medium at the same group velocity. Single-mode fibers usually have weak birefringence, resulting in two orthogonal polarization directions in the fiber, making it possible to generate vector solitons in single-mode fibers. Depending on the size of the fiber birefringence, various types of vector solitons can be generated in the fiber. Vector solitons can also be obtained in fiber lasers, and vector solitons generated by fiber lasers can be projected to obtain high-order vector solitons.

Vector solitons can also be generated in Kerr resonators/passive resonators, and the generation of time cavity solitons/vector solitons in Kerr resonators/passive resonators not only depends on the interaction between Kerr nonlinearity and dispersion, but also Rely on the balance between nonlinear parametric gain and cavity loss.

So far, there have been reports on the generation of high-order vector solitons based on fiber lasers, but there have been no reports on the generation of high-order vector solitons based on passive resonators.

The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted as prior art.

Contents of the invention

The main purpose of the present invention is to solve the technical problem in the prior art that high-order vector solitons cannot be generated based on the passive resonant cavity.

To achieve the above object, the present invention provides a high-order vector soliton generation system based on a passive resonant cavity, including: a continuous wave pump source, a first polarization controller, a first polarization beam splitter, a first modulator, a second a mode generator, a second modulator, a second mode generator, a polarization beam combiner, a coupler, a second polarization controller, a third polarization controller and a second polarization beam splitter;

The continuous wave pump source is connected to the inlet of the first polarization controller, the outlet of the first polarization controller is connected to the inlet of the first polarization beam splitter, and the outlet of the first polarization beam splitter The outlet 3a is connected to the first inlet of the first modulator, the outlet 3b of the first polarization beam splitter is connected to the first inlet of the second modulator, and the first mode generator is connected to the first inlet of the second modulator. The second inlet of a modulator is connected, the second mode generator is connected with the second inlet of the second modulator, the outlet of the first modulator is connected with the 8a inlet of the polarization beam combiner, and the The outlet of the second modulator is connected to the 8b inlet of the polarization beam combiner, the outlet of the polarization beam combiner is connected to the 9b inlet of the coupler, and the 9a inlet of the coupler is connected to the second polarization The outlet of the controller is connected, the 9c outlet of the coupler is connected with the inlet of the second polarization controller, the 9d outlet of the coupler is connected with the inlet of the third polarization controller, and the third polarization controller The outlet of the splitter is connected with the inlet of the second polarizing beam splitter.

Preferably, the continuous wave pumping source adopts a monochromatic continuous wave laser during simulation, the power of the monochromatic continuous wave laser is 2W, and the wavelength is 1550nm.

Preferably, the light splitting ratio of the first polarization beam splitter in simulation is 50:50.

Preferably, both the first mode generator and the second mode generator use an electric pulse generator during simulation, and the working power range of the electric pulse generator is 20 to 100W, and the electric pulse generator is used for Generate Gaussian pulses with preset pulse width, intensity and time delay;

According to requirements during simulation, the Gaussian pulses generated by the first mode generator and the second mode generator in turn are:

Two single-peak Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 60ps;

A single-peak Gaussian pulse and a double-peak Gaussian pulse with a pulse width of 20ps, an intensity of 72W, and a time interval of 360ps, where the time interval between the double-peak Gaussian pulses is set to 200ps;

Two bimodal Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 440ps, where the time interval between the bimodal Gaussian pulses is set to 200ps.

Preferably, both the first modulator and the second modulator use intensity modulation during simulation to obtain a continuous wave pump field with intensity perturbation added;

The continuous wave pump field with intensity perturbation added includes: polarization state u and polarization state v, u axis and v axis are two orthogonal polarization axes;

The polarization state u is expressed as:

The polarization state v is expressed as:

Among them, E _in is the continuous wave pump field output by the continuous wave pump source; E _in,u(z,τ) and E _in,v(z,τ) are the first modes corresponding to the polarization states u and v The driving field strength generated by the generator and the second mode generator; E _p,u and E _p,v are the intensity modulation generated by the first mode generator and the second mode generator corresponding to the polarization states u and v respectively τ _u and τ _v are the pulse widths of the Gaussian pulses generated by the first mode generator and the second mode generator respectively; Δτ _drift is the drift time of the polarization state v relative to u; f(z) is Rectangular function, f(z)=Π(z/Ln ₀ -1/2) For z∈[n ₀ L,(n ₀ +1)L], z and L are the transmission distance and cavity length respectively, when f( When z) is 0, it means that the intensity modulation is injected in the n _0th cycle.

Preferably, the coupling degree of the coupler during simulation is 90:10.

Preferably, the coupler and the second polarization controller form a passive ring resonant cavity through a polarization-maintaining fiber, and the continuous wave pump field with intensity perturbation is added to obtain a vector cavity through the passive ring resonant cavity Soliton;

The evolution formula of the continuous wave pump field with intensity perturbation added in the passive ring resonator is as follows:

Among them, z is the transmission distance in the cavity; u and v are the slowly changing electric field envelopes of the two polarization states; α ₁ =(α-ln(1-k))/(2L), α is the loss in the cavity, k is the power coupling coefficient, L is the cavity length; Δβ is the wavevector mismatch between two polarization modes; δ ₁ = δ ₀ /L, δ ₀ is the phase mismatch of the loop; β ₂ is the group velocity dispersion; Δβ ₁ is the group velocity mismatch; γ is the Kerr nonlinear coefficient; η=k ^1/2 /L; E _in is a continuous wave pump field; χ is the linear polarization direction of the pump field.

A method for generating high-order vector solitons based on passive resonators, realized based on the above-mentioned high-order vector soliton generation system based on passive resonators, including:

S1: Start the simulation, the continuous wave pump source generates input laser light;

S2: The input laser light passes through the first polarization controller, the first polarization beam splitter, the first modulator, and the second modulator in sequence, and passes through the first mode generator and the second modulator respectively. Intensity modulation is performed under the action of the second mode generator to obtain a continuous wave pump field with intensity perturbation added; the coupler and the second polarization controller form the passive ring resonator;

S3: passing the continuous wave pump field with intensity perturbation added through the polarization beam combiner and the coupler in sequence, entering the passive ring resonator for excitation and obtaining vector cavity solitons;

S4: Pass the vector cavity soliton through the third polarization controller and the second polarization beam splitter in sequence, and the two polarization orthogonal components of the vector cavity soliton are respectively on the horizontal axis and the vertical axis of the second polarization beam splitter Project on the axis to obtain the results of horizontal axis projection and vertical axis projection;

The projection process is as follows:

H＝u·cosθ+v·sinθ

V=u·sinθ-v·cosθ

Wherein, H represents the projection result on the horizontal axis, V represents the projection result on the vertical axis, and θ represents the angle between the polarization state u and the horizontal axis in the second polarization beam splitter;

S5: Obtain a higher-order vector soliton according to the two polarization orthogonal components of the vector cavity soliton, the horizontal-axis projection result, and the vertical-axis projection result, specifically:

For the two vector cavity solitons whose polarization orthogonal components are "1+1", if both the projection results on the horizontal axis and the projection results on the vertical axis are two pulses, then the vector soliton obtained after projection is of the "2+2" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator and the second mode generator are: two single-peak Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 60 ps;

For the two vector cavity solitons whose polarization orthogonal components are "1+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are three pulses, then the vector solitons obtained after projection are of the "3+3" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator and the second mode generator are: a single-peak Gaussian pulse and a double-peak Gaussian pulse with a pulse width of 20ps, an intensity of 72W, and a time interval of 360ps , where the time interval between bimodal Gaussian pulses is set to 200ps;

For the two vector cavity solitons whose polarization orthogonal components are "2+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are four pulses, then the vector soliton obtained after projection is of the "4+4" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator and the second mode generator are: two double-peak Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 440ps, of which the double-peaked Gaussian pulse The time interval between pulses was set to 200ps.

The present invention has the following beneficial effects:

By generating high-order vector solitons based on passive resonators, a new idea for generating high-order vector solitons is provided.

Description of drawings

Fig. 1 is a system structure diagram of an embodiment of the present invention;

Fig. 2 is the flow chart of the method of the embodiment of the present invention;

Fig. 3 is a time-domain diagram of a "2+2" type high-order vector soliton;

Fig. 4 is a spectrum diagram of a "2+2" type high-order vector soliton;

Fig. 5 is a time-domain diagram of a "3+3" type high-order vector soliton;

Fig. 6 is a spectrum diagram of a "3+3" type high-order vector soliton;

Fig. 7 is a time-domain diagram of a "4+4" type high-order vector soliton;

Figure 8 is a spectrum diagram of a "4+4" type high-order vector soliton;

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1, the present invention provides a high-order vector soliton generation system based on a passive resonator, including: a continuous wave pump source 1, a first polarization controller 2, a first polarization beam splitter 3, and a first modulator 6. The first mode generator 4, the second modulator 7, the second mode generator 5, the polarization beam combiner 8, the coupler 9, the second polarization controller 10, the third polarization controller 11 and the second polarization splitter Beamer 12;

The continuous wave pumping source 1 is connected to the inlet of the first polarization controller 2, the outlet of the first polarization controller 2 is connected to the inlet of the first polarization beam splitter 3, and the first polarization The 3a outlet of the beam splitter 3 is connected to the first inlet of the first modulator 6, the 3b outlet of the first polarizing beam splitter 3 is connected to the first inlet of the second modulator 7, and the first polarizing beam splitter 3 is connected to the first inlet of the second modulator 7. A pattern generator 4 is connected with the second inlet of the first modulator 6, the second pattern generator 5 is connected with the second inlet of the second modulator 7, and the outlet of the first modulator 6 It is connected with the 8a inlet of the polarization beam combiner 8, the outlet of the second modulator 7 is connected with the 8b inlet of the polarization beam combiner 8, and the outlet of the polarization beam combiner 8 is connected with the coupler 9 The 9b inlet of the coupler 9 is connected to the outlet of the second polarization controller 10, the 9c outlet of the coupler 9 is connected to the inlet of the second polarization controller 10, and the coupling The outlet 9d of the beam splitter 9 is connected to the inlet of the third polarization controller 11 , and the outlet of the third polarization controller 11 is connected to the inlet of the second polarization beam splitter 12 .

In this embodiment, the continuous wave pumping source 1 adopts a monochromatic continuous wave laser during simulation, the power of the monochromatic continuous wave laser is 2W, and the wavelength is 1550nm; wherein the mark A is the pumping light Input, marked B is the laser output of higher-order vector solitons.

In this embodiment, the combined simulation of the first polarization controller 2 and the first polarization beam splitter 3 is used to realize the separation of the orthogonal polarization components, and the splitting ratio of the first polarization beam splitter 3 during simulation is 50: 50. The separated laser light is respectively output from the output port 3a and the output port 3b.

In this embodiment, the first pattern generator 4 and the second pattern generator 5 both use electric pulse generators during simulation, and the working power range of the electric pulse generators is 20 to 100W. The pulse generator is used to generate Gaussian pulses with preset pulse width, intensity and time delay;

According to requirements during simulation, the Gaussian pulses generated by the first pattern generator 4 and the second pattern generator 5 in turn are:

(1) Two single-peak Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 60ps;

(2) A single-peak Gaussian pulse and a double-peak Gaussian pulse with a pulse width of 20ps, an intensity of 72W, and a time interval of 360ps, wherein the time interval between the double-peak Gaussian pulses is set to 200ps;

(3) Two bimodal Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 440 ps, wherein the time interval between the bimodal Gaussian pulses is set to 200 ps.

In this embodiment, the first modulator 6 and the second modulator 7 both adopt intensity modulation during simulation; the Gaussian pulse signals generated by the first mode generator 4 and the second mode generator 5 respectively drive the first A modulator 6 and a second modulator 7, adding intensity perturbation to the continuous wave pumping field input by port 3a and port 3b, to obtain a continuous wave pumping field with intensity perturbation added;

The continuous wave pump field with intensity perturbation added includes: polarization state u and polarization state v, u axis and v axis are two orthogonal polarization axes;

The polarization state u is expressed as:

The polarization state v is expressed as:

Among them, E _in is the continuous wave pump field output by the continuous wave pump source 1; E _in,u(z,τ) and E _in,v(z,τ) are the first polarization states corresponding to u and v The driving field intensity produced by the mode generator 4 and the _second mode generator 5 _; τ _u and τ _v are the pulse widths of the Gaussian pulses generated by the first mode generator 4 and the second mode generator 5 respectively; Δτ _drift is the drift of the polarization state v relative to u Time; f(z) is a rectangular function, f(z)=Π(z/Ln ₀ -1/2) For z∈[n ₀ L,(n ₀ +1)L], z and L are transmission distances respectively and the cavity length, when f(z) is 0, it means that the intensity modulation is injected in the n _0th cycle.

In this embodiment, the polarization beam combiner 8 is used to input and couple two modulated orthogonally polarized laser beams from the entrance 8a and the entrance 8b respectively;

The coupling degree of the coupler 9 in the simulation is 90:10, where marks 9a, 9b are the inlets of the coupler 9, and marks 9c, 9d are 10% outlets and 90% outlets of the coupler 9, respectively.

In this embodiment, the coupler 9 and the second polarization controller 10 form a passive ring resonant cavity through a polarization-maintaining fiber, and the continuous wave pump field with intensity perturbation added passes through the passive ring resonator The cavity obtains vector cavity solitons;

The length of the passive ring resonator in simulation is 85m, the repetition frequency is 2.39MHz, the loss per unit length is 0.0011/m, the group velocity dispersion is -20ps ² km ^-1 , and the group velocity mismatch is 1×10 ^-13 s·m ^-1 , the wave vector mismatch is -0.0049m ^-1 , the Kerr nonlinear coefficient is 1.2×10 ^-3 W ^-1 m ^-1 , the coupling efficiency is 0.0026m ^-1 , the linear polarization direction of the pump field is 0.15π;

The second polarization controller 10 adjusts the wavevector mismatch according to the two resonances of each polarization mode to ensure that the laser stop frequency is located in the effective red light detuning region;

The evolution formula of the continuous wave pump field with intensity perturbation added in the passive ring resonator is as follows:

Among them, z is the transmission distance in the cavity; u and v are the slowly changing electric field envelopes of the two polarization states; α ₁ =(α-ln(1-k))/(2L), α is the loss in the cavity, k is the power coupling coefficient, L is the cavity length; Δβ is the wavevector mismatch between two polarization modes; δ ₁ = δ ₀ /L, δ ₀ is the phase mismatch of the loop; β ₂ is the group velocity dispersion; Δβ ₁ is the group velocity mismatch; γ is the Kerr nonlinear coefficient; η=k ^1/2 /L; E _in is a continuous wave pump field; χ is the linear polarization direction of the pump field;

The third polarization controller 11 is used to change the polarization direction of the basic-order or high-order vector soliton output by the 9d exit and the phase difference between the two orthogonal polarization components, and the second polarization beam splitter 12 is coupled to the polarization beam splitter by a fiber , at this time, the two polarization components of the fundamental or higher-order vector solitons will be projected on the horizontal and vertical axes of the polarization beam splitter, and the higher-order vector solitons can be obtained as a result of the projection.

Referring to Fig. 2, the present invention provides a method for generating high-order vector solitons based on passive resonators, based on the realization of the above-mentioned high-order vector soliton generation system based on passive resonators, including:

S1: Start the simulation, the continuous wave pump source 1 generates input laser light;

In the specific implementation, the output power of the continuous wave pump source 1 is set to 2W during the simulation;

S2: The input laser light sequentially passes through the first polarization controller 2, the first polarization beam splitter 3, the first modulator 6, and the second modulator 7, and respectively Intensity modulation is performed under the action of the mode generator 4 and the second mode generator 5 to obtain a continuous wave pump field with intensity perturbation added; the coupler 9 and the second polarization controller 10 constitute the Passive ring resonators;

S3: passing the continuous wave pump field with intensity perturbation added through the polarization beam combiner 8 and the coupler 9 in sequence, entering the passive ring resonator for excitation and obtaining vector cavity solitons;

S4: Pass the vector cavity soliton through the third polarization controller 11 and the second polarization beam splitter 12 in sequence, and the two polarization orthogonal components of the vector cavity soliton are respectively in the transverse direction of the second polarization beam splitter 12 Axis and vertical axis are projected to obtain the results of horizontal axis projection and vertical axis projection;

The projection process is as follows:

H＝u·cosθ+v·sinθ

V=u·sinθ-v·cosθ

Wherein, H represents the projection result on the horizontal axis, V represents the projection result on the vertical axis, and θ represents the angle between the polarization state u and the horizontal axis in the second polarization beam splitter 12;

S5: Obtain a higher-order vector soliton according to the two polarization orthogonal components of the vector cavity soliton, the horizontal-axis projection result, and the vertical-axis projection result, specifically:

For the two vector cavity solitons whose polarization orthogonal components are "1+1", if both the projection results on the horizontal axis and the projection results on the vertical axis are two pulses, then the vector soliton obtained after projection is of the "2+2" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator 4 and the second mode generator 5 are: two single-peak Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 60 ps; Fig. 3 is the time-domain diagram of the "2+2" type high-order vector soliton, and Fig. 4 is the spectrum diagram of the "2+2" type high-order vector soliton;

For the two vector cavity solitons whose polarization orthogonal components are "1+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are three pulses, then the vector solitons obtained after projection are of the "3+3" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator 4 and the second mode generator 5 are: a single peak Gaussian pulse and a double peak with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 360 ps Gaussian pulse, where the time interval between double-peak Gaussian pulses is set to 200ps; Figure 5 is the time-domain diagram of the "3+3" type higher-order vector soliton, and Figure 6 is the spectrum of the "3+3" type higher-order vector soliton picture;

For the two vector cavity solitons whose polarization orthogonal components are "2+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are four pulses, then the vector soliton obtained after projection is of the "4+4" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator 4 and the second mode generator 5 are: two bimodal Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 440 ps. The time interval between the peak Gaussian pulses is set to 200 ps; Figure 7 is the time-domain diagram of the "4+4" type high-order vector soliton, and Fig. 8 is the spectrum diagram of the "4+4" type high-order vector soliton.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order and these words may be construed as designations.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (8)

1. A high-order vector soliton generation system based on a passive resonant cavity, characterized in that it comprises: a continuous wave pump source (1), a first polarization controller (2), a first polarization beam splitter (3) , the first modulator (6), the first mode generator (4), the second modulator (7), the second mode generator (5), the polarization beam combiner (8), the coupler (9), the first Two polarization controllers (10), a third polarization controller (11) and a second polarization beam splitter (12); The continuous wave pumping source (1) is connected to the inlet of the first polarization controller (2), and the outlet of the first polarization controller (2) is connected to the first polarization beam splitter (3) The inlet is connected, the 3a outlet of the first polarizing beam splitter (3) is connected with the first inlet of the first modulator (6), the 3b outlet of the first polarizing beam splitter (3) is connected with the The first inlet of the second modulator (7) is connected, the first pattern generator (4) is connected to the second inlet of the first modulator (6), and the second pattern generator (5) is connected to the second inlet of the first modulator (6). The second inlet of the second modulator (7) is connected, the outlet of the first modulator (6) is connected with the 8a inlet of the polarization beam combiner (8), and the second modulator (7) The outlet of the polarization beam combiner (8) is connected with the 8b inlet of the polarization beam combiner (8), the outlet of the polarization beam combiner (8) is connected with the 9b inlet of the coupler (9), and the 9a of the coupler (9) The inlet is connected with the outlet of the second polarization controller (10), the 9c outlet of the coupler (9) is connected with the inlet of the second polarization controller (10), and the 9d of the coupler (9) The outlet is connected to the inlet of the third polarization controller (11), and the outlet of the third polarization controller (11) is connected to the inlet of the second polarization beam splitter (12); Both the first pattern generator (4) and the second pattern generator (5) use an electric pulse generator during simulation, and the electric pulse generator is used to generate a Gaussian with preset pulse width, intensity and time delay. pulse; Both the first modulator (6) and the second modulator (7) use intensity modulation during simulation to obtain a continuous wave pump field with intensity perturbation added; The coupler (9) and the second polarization controller (10) form a passive ring resonator through a polarization-maintaining fiber, and the continuous wave pump field with intensity perturbation added passes through the passive ring resonator Obtain vector cavity solitons. 2. the high-order vector soliton generation system based on passive resonant cavity according to claim 1, is characterized in that, described continuous wave pumping source (1) adopts the continuous wave laser of monochromatic light during emulation, described The monochromatic continuous wave laser has a power of 2W and a wavelength of 1550nm. 3. The passive cavity-based high-order vector soliton generation system according to claim 1, characterized in that, the light splitting ratio of the first polarization beam splitter (3) in simulation is 50:50. 4. The high-order vector soliton generation system based on passive resonant cavity according to claim 1, wherein the operating power range of the electric pulse generator is 20 to 100W; According to demand during emulation, the Gaussian pulse that described first mode generator (4) and described second mode generator (5) produce successively is: Two single-peak Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 60ps; A single-peak Gaussian pulse and a double-peak Gaussian pulse with a pulse width of 20ps, an intensity of 72W, and a time interval of 360ps, where the time interval between the double-peak Gaussian pulses is set to 200ps; Two bimodal Gaussian pulses with a pulse width of 20ps, an intensity of 72W, and a time interval of 440ps, where the time interval between the bimodal Gaussian pulses is set to 200ps. 5. the high-order vector soliton generation system based on passive resonant cavity according to claim 1, is characterized in that, The continuous wave pump field with intensity perturbation added includes: polarization state u and polarization state v, u axis and v axis are two orthogonal polarization axes; The polarization state u is expressed as: E _in,u(z,τ) ＝E _in cos(χ)+E _p,u exp[-τ ² /(2τ _u ² )]f(z) The polarization state v is expressed as: E _in,v(z,τ) ＝E _in sin(χ)+E _p,v exp[-(τ-Δτ _drift ) ² /(2τ _v ² )]f(z) Among them, E _in is the continuous wave pump field output by the continuous wave pump source (1); E _in,u(z,τ) and E _in,v(z,τ) are the polarization states corresponding to u and v The driving field intensity produced by the first mode generator (4) and the second mode generator (5); E _{p, u} and E _{p, v} are the first mode generator (4) corresponding to the polarization states u and v respectively and the peak intensity of the driving field used for intensity _{modulation produced} by the second mode generator (5); Pulse width; Δτ _drift is the drift time of the polarization state v relative to u; f(z) is a rectangular function, f(z)=Π(z/Ln ₀ -1/2) for z∈[n ₀ L,(n ₀ +1)L], z and L are the transmission distance and the cavity length, respectively. When f(z) is 0, it means that the intensity modulation is injected in the n _0th cycle. 6. The passive resonator-based high-order vector soliton generation system according to claim 1, characterized in that, the coupling degree of the coupler (9) during simulation is 90:10. 7. the high-order vector soliton generation system based on passive resonant cavity according to claim 1, is characterized in that, The evolution formula of the continuous wave pump field with intensity perturbation added in the passive ring resonator is as follows:

Among them, z is the transmission distance in the cavity; u and v are the slowly changing electric field envelopes of the two polarization states; α ₁ =(α-ln(1-k))/(2L), α is the loss in the cavity, k is the power coupling coefficient, L is the cavity length; Δβ is the wavevector mismatch between two polarization modes; δ ₁ = δ ₀ /L, δ ₀ is the phase mismatch of the loop; β ₂ is the group velocity dispersion; Δβ ₁ is the group velocity mismatch; γ is the Kerr nonlinear coefficient; η=k ^{1 /2} /L; E _in is a continuous wave pump field; χ is the linear polarization direction of the pump field. 8. A method for generating high-order vector solitons based on passive resonators, based on the realization of the system for generating high-order vector solitons based on passive resonators as claimed in any one of claims 1-7, characterized in that, comprising: S1: Start the simulation, the continuous wave pump source (1) generates input laser light; S2: The input laser light sequentially passes through the first polarization controller (2), the first polarization beam splitter (3), the first modulator (6), and the second modulator (7) , and perform intensity modulation under the action of the first mode generator (4) and the second mode generator (5) respectively, to obtain a continuous wave pumping field with intensity perturbation added; the coupler ( 9) and the second polarization controller (10) constitute the passive ring resonator; S3: Pass the continuous wave pump field with intensity perturbation added through the polarization beam combiner (8) and the coupler (9) in sequence, enter the passive ring resonator for excitation and obtain a vector cavity Soliton; S4: Pass the vector cavity soliton through the third polarization controller (11) and the second polarization beam splitter (12) in sequence, and the two polarization orthogonal components of the vector cavity soliton are separated in the second polarization beam splitter Project on the horizontal axis and the vertical axis of the device (12), obtain the horizontal axis projection result and the vertical axis projection result; The projection process is as follows: H＝u·cosθ+v·sinθ V=u·sinθ-v·cosθ Wherein, H represents the horizontal axis projection result, V represents the vertical axis projection result, and θ represents the angle between the polarization state u and the horizontal axis in the second polarization beam splitter (12); S5: Obtain a higher-order vector soliton according to the two polarization orthogonal components of the vector cavity soliton, the horizontal-axis projection result, and the vertical-axis projection result, specifically: For the two vector cavity solitons whose polarization orthogonal components are "1+1", if both the projection results on the horizontal axis and the projection results on the vertical axis are two pulses, then the vector soliton obtained after projection is of the "2+2" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator (4) and the second mode generator (5) are: two single-peak Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 60 ps pulse; For the two vector cavity solitons whose polarization orthogonal components are "1+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are three pulses, then the vector solitons obtained after projection are of the "3+3" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator (4) and the second mode generator (5) are: a single-peak Gaussian pulse with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 360 ps and a bimodal Gaussian pulse, where the time interval between bimodal Gaussian pulses is set to 200ps; For the two vector cavity solitons whose polarization orthogonal components are "2+2", if both the projection results on the horizontal axis and the projection results on the vertical axis are four pulses, then the vector soliton obtained after projection is of the "4+4" type High-order vector solitons; the corresponding Gaussian pulses output by the first mode generator (4) and the second mode generator (5) are: two double-peak Gaussian pulses with a pulse width of 20 ps, an intensity of 72 W, and a time interval of 440 ps pulses, where the time interval between the bimodal Gaussian pulses was set to 200 ps.

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