A solis photon pump array based on two-dimensional non-abelian and harmonic principle and a pumping method thereof

Abstract

The application discloses a Solis photon pump array based on two-dimensional non-Abelian and fun principle and a pumping method thereof, and belongs to the technical field of laser micro-nano machining. The Solis photon pump array is formed by stacking multiple waveguide unit cells in a dense arrangement in the vertical propagation direction. Each of the multiple waveguide unit cells is a "vegetable basket" structure. The waveguide unit cell comprises a first main waveguide, a second main waveguide, a first auxiliary waveguide, a second auxiliary waveguide, a first straight waveguide and a second straight waveguide. The first main waveguide is located at the bottom surface of the "vegetable basket" structure, the second main waveguide and the first auxiliary waveguide are respectively located at two side surfaces of the "vegetable basket" structure, the second auxiliary waveguide is located at the handle surface of the "vegetable basket" structure which is symmetrical to the bottom surface, and the first straight waveguide and the second straight waveguide are respectively located at two mutually parallel edge lines of the bottom surface of the "vegetable basket" structure, and the direction is the propagation direction. The Solis photon pump is integrated in the horizontal and vertical directions by periodically adjusting the horizontal and vertical coupling coefficients between the waveguides, and then the photon control can be performed in the horizontal and vertical directions. The application further improves the calculation dimension of the Solis photon pump device, and realizes one-step construction and preparation of a high-order unitary matrix operation module based on the Solis pump.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser micro-nano processing, and particularly relates to a Solis photon pump array based on a two-dimensional non-Abelian and Yang-Baxter principle and a pumping method thereof. BACKGROUND

[0002] With the development of topological photonics in recent years, the regulation of photon states in a topologically protected manner has attracted more and more attention. Solis photon pumps based on the non-Abelian and Yang-Baxter principle have high robustness and global anti-interference characteristics, and are one of the ideal photon devices for realizing non-Abelian optical computing. Compared with the method of preparing Solis photon pumps by using a mask and other planar processes, femtosecond laser direct writing technology can focus high-energy laser pulses inside a transparent material through an objective lens, nonlinear absorption occurs in the focal region, and the refractive index of the material is increased, thereby realizing the preparation of an arbitrary three-dimensional waveguide. This preparation method has the advantages of true three-dimensional processing, fast flow sheet speed, and low preparation cost. However, how to use the large longitudinal processing capability of femtosecond laser to prepare a large-scale three-dimensional Solis photon pump array is currently the main challenge.

[0003] At present, research groups in various countries have realized Solis photon pumps based on one-dimensional non-Abelian and Yang-Baxter principle in glass, silicon nitride and other materials, and the photon manipulation can only be carried out in a single pump or a single horizontal direction. Although the waveguide has a three-dimensional rotation in this process, the total longitudinal depth does not exceed the order of ten microns, and the advantage of large longitudinal direct writing of femtosecond laser cannot be fully utilized. More importantly, the above structure has the problem of insufficient computing dimension, and it is difficult to realize the high-order unitary matrix operation module of the photon state, which seriously restricts the scaling and complexity of the on-chip topological optical computing.

[0004] Therefore, there is an urgent need for a method that can realize arbitrary directional photon state pumping in a large longitudinal range, thereby further improving the application capability of Solis photon pumps in topological optical computing. SUMMARY

[0005] In view of the deficiencies of the prior art, the application provides a Solis photon pump array based on a two-dimensional non-Abelian and Yang-Baxter principle and a pumping method thereof. Unlike the existing Solis photon pump based on one-dimensional non-Abelian and Yang-Baxter principle, this method uses a method of periodically adjusting the horizontal and longitudinal coupling coefficients between waveguides to realize the three-dimensional integration of Solis photon pumps in the horizontal and vertical directions, and then enables the photon manipulation to be carried out in both the horizontal and vertical directions. The application further improves the computing dimension of the Solis photon pump device and realizes one-step construction and preparation of a high-order unitary matrix operation module based on the Solis pump.

[0006] The principle of the application is as follows:

[0007] Solis photon pump is formed by the periodic change of waveguide array Hamiltonian parameter space, according to the non-Abelian and Aharonov principle, when a pair of coupling coefficients between three waveguide systems presents symmetrical rise and fall change, the photon state can be pumped from the starting waveguide to the end waveguide in a way protected by Hilbert space topology property with high robustness. The design of Solis photon pump based on two-dimensional non-Abelian and Aharonov principle, first, consider the required light evolution direction, calculate the pumping direction and path of Solis pump, that is, the curve equation of waveguide in the processing process. Focus high-energy pulsed laser reaching a specific energy threshold inside the transparent material, then make the sample relative to the focus position three-dimensional continuous motion through high-precision motion control platform, so that the focus writes continuous modified region in the material, thereby realizing the preparation of three-dimensional parallel arrangement of Solis photon pump array. Six waveguides described by the designed curve equation form a three-dimensional waveguide unit cell, according to the required three-dimensional device size, the cell is stacked, and the cells are connected by Solis pump; due to the periodic change of the coupling coefficient, when the incident light is input from any degenerate waveguide in the incident plane, the same high-robustness path transmission effect can be achieved, and the wideband characteristics are presented.

[0008] The application is realized by the following technical scheme:

[0009] A Solis photon pump array based on two-dimensional non-Abelian and Aharonov principle, the Solis photon pump array is formed by stacking a plurality of waveguide unit cells in a dense manner in the vertical propagation direction; wherein the plurality of waveguide unit cells are all "vegetable basket" structures; the waveguide unit cell comprises a first main waveguide 1, a second main waveguide 2, a first auxiliary waveguide 3, a second auxiliary waveguide 4, a first straight waveguide 5 and a second straight waveguide 6; the first main waveguide 1 is located at the bottom surface of the "vegetable basket" structure, the second main waveguide 2 and the first auxiliary waveguide 3 are respectively located at the two side surfaces of the "vegetable basket" structure, the second auxiliary waveguide 4 is located at the handle surface of the "vegetable basket" structure which is symmetrical to the bottom surface, and the first straight waveguide 5 and the second straight waveguide 6 are respectively located at the two parallel edges of the bottom surface of the "vegetable basket" structure, and the direction is the propagation direction.

[0010] Further, the first main waveguide 1 in the plurality of waveguide unit cells constitutes a first rhombic grid which changes periodically along the diagonal, the second main waveguide 2 in the plurality of waveguide unit cells constitutes a second rhombic grid which changes periodically along the diagonal, and when one of the 45-degree diagonals is observed, the main waveguide 1 layer and the main waveguide 2 layer appear alternately and the waveguides satisfy the collinearity, the change direction of the cell position number i is defined as the diagonal, and the change direction of the position number j is defined as the other diagonal perpendicular to the diagonal. Any point in the first rhombic grid is marked as A ij , and any point in the second rhombic grid is marked as B ij ; when the test light is input from any point A ijInput, after a finite number of coupling transmissions to any point B in the second rhombic grid ij Output; conversely, the test light can also be transmitted from any point B in the second rhombic grid ij to any point A in the first rhombic grid ij ; wherein i, j are both cell position numbers.

[0011] Further, the lattice spacing of the first rhombic grid and the second rhombic grid is in the range of 40-160λ, the interlaminar spacing of the first rhombic grid and the second rhombic grid is in the range of 20-80λ; the spacing d0 of the first straight waveguide 5 and the second straight waveguide 6 is in the range of 30-120λ; wherein λ is the wavelength of the pumped test excitation light.

[0012] Further, the first main waveguide 1, the second main waveguide 2, the first auxiliary waveguide 3 and the second auxiliary waveguide 4 evolve in a straight line or a curve in the plane they are in, and in the evolution process, the spatial distance of the first main waveguide 1, the second main waveguide 2, the first auxiliary waveguide 3 and the second auxiliary waveguide 4 from the first straight waveguide 5 and the second straight waveguide 6 at the edge of the plane is the coupling distance, wherein the maximum coupling distance d1 is in the range of 15-115λ, the minimum coupling distance d2 is in the range of 5-15λ, and d1>d2; since the first straight waveguide 5 and the second straight waveguide 6 are parallel, there is a relationship d1+d2=d0.

[0013] Further, the overall size of the waveguide unit cell is d0xd0xl tp , wherein l tp is the propagation length of each step of the solis pump, in the range of 10 4 -10 5 λ; the unit cell adopts two-dimensional plane close packing in the vertical propagation direction and direct connection in the propagation direction, the horizontal period number of the cells of the device is n x , the vertical period number is n y , and the number of steps of the pump in the propagation direction is n tp , so the overall size of the device is n x d0xn y d0xn tp l tp .

[0014] On the other hand, the present application provides a solis photon pump array pumping method based on two-dimensional non-Abelian and harmonic principles, which specifically includes the following contents:

[0015] When the test light is input from the first main waveguide 1 of the waveguide unit cell, it will be pumped to the second main waveguide 2 of the waveguide unit cell via the first straight waveguide 5; when the test light is input from the second main waveguide 2 of the waveguide unit cell, it will be sequentially pumped to the first auxiliary waveguide 3 of the lower right corner cell, and then pumped to the first main waveguide 1 of the cell, so as to realize the energy exchange of the first main waveguide 1 and the second main waveguide 2.

[0016] Compared with the prior art, the advantages of the present application are as follows:

[0017] (1) Compared with the Solis pump prepared based on one-dimensional non-Abelian and Landau principle, the present application can prepare photon state pumping in two directions of horizontal and vertical inside the transparent material, and can be expanded in any size according to the device requirements; more importantly, due to the improvement of the pumping dimension, the present application can provide a high-robustness solution for more complex on-chip optical computing;

[0018] (2) The present application introduces two-dimensional non-Abelian and Landau principle into the Solis photon pump array in a unitized and standardized manner, which simply and intuitively shows the description and connection mode of the waveguide unit cell, and has the advantages of being able to be connected and integrated with other three-dimensional photon devices arbitrarily;

[0019] (3) The Solis photon pump array based on two-dimensional non-Abelian and Landau principle has a pumping method which is topologically protected and has a global non-resonant effect, so it has the significant advantages of large working bandwidth and immunity to local interference, and can provide a new and valuable solution for large-bandwidth and high-robustness on-chip optical computing devices. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0021] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the Solis photon array based on two-dimensional non-Abelian and Landau principle of the present application;

[0022] (a) is a schematic diagram of the three-dimensional structure of the unit cell of the three-step pumping Solis photon pump array device; (b) is a schematic diagram of the cross section of the unit cell;

[0023] Among them, the first main waveguide 1, the second main waveguide 2, the first auxiliary waveguide 3, the second auxiliary waveguide 4, the first straight waveguide 5, the second straight waveguide 6;

[0024] Figure 2The processing device schematic diagram for preparing the Solis photon pump array based on two-dimensional non-Abelian and fun principle by femtosecond laser direct writing of the application;

[0025] Wherein, HWP-half wave plate, GTL-Grin-Taylor prism, L1-first concave lens, L2-second convex lens, L3-third convex lens, L4-fourth convex lens, M1-first mirror, M2-second mirror, M3-third mirror, OL-objective lens, SLM-space light modulator, CCD-camera, LED-illumination light source, PC-computer terminal;

[0026] Figure 3 The schematic diagram of the single pump structure and the coupling coefficient variation curve used in the application;

[0027] Wherein, (a) is the structural schematic diagram of three waveguide pumping, wherein the dark waveguide a is the incident waveguide, the light waveguide b is the intermediate straight waveguide, and the dark waveguide c is the exit waveguide; (b) is the coupling coefficient variation curve between the incident and exit waveguide a, b and the intermediate straight waveguide c, and the line type is straight line type; (c) is the cross-sectional example diagram of two kinds of coupling modes in space;

[0028] Figure 4 The cross-sectional schematic diagram and microscope image of the waveguide unit cell close-packed in the application;

[0029] Wherein, (a) is the cross-sectional schematic diagram of the waveguide unit cell, the dark circle represents the first main waveguide 1, the light circle represents the second main waveguide 2, the dark triangle represents the first auxiliary waveguide 3, the light triangle represents the second auxiliary waveguide 4, the square waveguide corresponds to the first straight waveguide 5 and the second straight waveguide 6 respectively, and the relative number of the waveguide changes as shown in the (i, j) coordinate; (b) is the cross-sectional microscope image of the Solis photon pump described in the application;

[0030] Figure 5 The coupling coefficient variation diagram and the simulated light intensity pumping curve of the waveguide unit cell in the application;

[0031] Wherein, (a) is the coupling coefficient variation curve of two different three-step pumping devices, wherein κ 15 , κ 16 is the coupling coefficient curve of the first main waveguide 1 and the first straight waveguide 5 and the second straight waveguide 6 respectively; similarly, κ 25 , κ 26 , κ 35 , κ 36 , κ 45 , κ 46(a) The coupling coefficient variation curves of the second main waveguide 2, the first auxiliary waveguide 3, and the second auxiliary waveguide 4 with the straight waveguides on both sides of the plane, respectively. All of the above curves are linear. (b) The simulation curves of the test light being pumped by the high intensity when the test light is input from the first main waveguide 1 and the second main waveguide 2 of device I defined by (a). (c) The simulation curves of the test light being pumped by the high intensity when the test light is input from the first main waveguide 1 and the second main waveguide 2 of device II defined by (a).

[0032] Figure 6 This is an energy distribution diagram of the exit face of the present invention;

[0033] Among them, the energy distribution at the output end face was shown after passing in 808nm vertically polarized test light; (a) passing in the first main waveguide 1 and the second main waveguide 2 of device I respectively; (b) passing in the first main waveguide 1 and the second main waveguide 2 of device II respectively; (c) passing in the first main waveguide 1 and the second main waveguide 2 of device I and device II cascaded respectively; (d) passing in the first main waveguide 1 and the second main waveguide 2 of device II and I cascaded respectively. Detailed Implementation

[0034] To clearly and completely describe the technical solution and its specific working process of the present invention, the specific embodiments of the present invention are as follows, in conjunction with the accompanying drawings:

[0035] Example 1

[0036] like Figure 1 As shown in (a), this embodiment provides a Solis photonic pump array based on the two-dimensional non-Abel and Lehmann principle, which is composed of multiple waveguide unit cells stacked in a close-packed manner in the vertical propagation direction; wherein, the multiple waveguide unit cells are all "basket" structures; the waveguide unit cells include a first main waveguide 1, a second main waveguide 2, a first auxiliary waveguide 3, a second auxiliary waveguide 4, a first straight waveguide 5, and a second straight waveguide 6; the first main waveguide 1 is located on the bottom surface of the "basket" structure, the second main waveguide 2 and the first auxiliary waveguide 3 are respectively located on the two sides of the "basket" structure, the second auxiliary waveguide 4 is located on the handle surface of the "basket" structure symmetrical to the bottom surface, and the first straight waveguide 5 and the second straight waveguide 6 are respectively located on two parallel side lines of the bottom surface of the "basket" structure, the direction of which is the propagation direction.

[0037] The first main waveguide 1 in the plurality of waveguide unit cells forms a first rhomboid grid that varies periodically along an oblique direction, and the second main waveguide 2 in the plurality of waveguide unit cells forms a second rhomboid grid that varies periodically along an oblique direction. Observing along one of the 45-degree oblique lines, the first main waveguide 1 and the second main waveguide 2 appear alternately and the waveguides are collinear. This oblique line is defined as the direction of change of cell position number i, and the other oblique line perpendicular to it is defined as the direction of change of position number j. Any point in the first rhomboid grid is marked as A.ij , any point in the second rhombic grid is marked as B ij ; when the test light is input from any point A ij in the first rhombic grid, it is transmitted to any point B ij in the second rhombic grid after a finite number of coupling; conversely, the test light can also be transmitted from any point B ij in the second rhombic grid to any point A ij in the first rhombic grid; wherein i, j are both cell position numbers.

[0038] In this embodiment, the lattice spacing of the first main waveguide 1 in the first rhombic grid and the second main waveguide 2 in the second rhombic grid is 48 μm; the interlayer spacing of the first rhombic grid and the second rhombic grid is 24 μm; the spacing of the first straight waveguide 5 and the second straight waveguide 6, i.e. the side length d0 of the "basket" structure, is 34 μm; the maximum coupling spacing d1 is 17 μm, and the corresponding coupling coefficient is 0.0166 rad / mm; the minimum coupling spacing d2 is 5 μm, and the corresponding coupling coefficient is 2.8969 rad / mm; the propagation length l tp of each step of the Solis pump is 14 mm. The overall size of the unit cell is 34 μm x 34 μm x 14 mm. The unit cells are densely packed in the two-dimensional plane in the vertical propagation direction and are simply connected in the propagation direction to form a device with a lateral period number n x of 5, a longitudinal period number n y of 3, a Solis pump step number n tp of 3, and a total device size of 170 μm x 102 μm x 42 mm.

[0039] In this embodiment, the Solis pump array is a three-step pump, which is divided into three sections along the propagation direction: 0-14 mm, 14-28 mm, and 28-42 mm; the coupling spacing between the first main waveguide 1 and the first straight waveguide 5 is 17 μm in the first section and does not change, decreases from 17 μm to 5 μm in the second section, rapidly increases to 29 μm at the end of this section, and decreases from 29 μm to 17 μm in the third section; the coupling spacing between the second main waveguide 2 and the first straight waveguide 5 decreases from 17 μm to 5 μm in the first section, increases from 5 μm to 17 μm in the second section, and does not change at 17 μm in the third section; the coupling spacing between the first auxiliary waveguide 3 and the first straight waveguide 5 increases from 5 μm to 17 μm in the first section, does not change at 17 μm in the second section, and increases from 17 μm to 29 μm in the third section. Since the first straight waveguide 5 and the second straight waveguide 6 are parallel to each other and have a constant spacing of 34 μm, the coupling spacing between the above waveguides and the second straight waveguide 6 can be directly obtained by subtracting the coupling spacing from the first straight waveguide 5. Figure 5 The corresponding coupling coefficient variation relationship of the above coupling spacing variation is shown in (a) of FIG. 6, and the coupling coefficients are all linearly varied.

[0040] In the embodiment, the Solis photon pump array is prepared by femtosecond laser direct writing technology, and the specific steps are as follows:

[0041] A1, fix the clean sample on the sample stage, lower the objective lens OL, and make the laser focus close to the sample surface. The focus morphology collected by the computer end is observed in real time. Adjust the leveling knob, and the spot image remains unchanged when the sample motion control platform moves along the X axis and Y axis respectively, indicating that the sample surface is relatively parallel to the motion direction of the sample stage and perpendicular to the laser incidence direction, that is, the sample stage has completed leveling;

[0042] A2, move the sample to the starting position of processing, lower the objective lens to the appropriate processing depth, and adjust to the appropriate laser power. Then, load the designed Solis photon pump processing program into the displacement table, and start processing;

[0043] A3, after processing, cut off 1mm from both ends of the sample with a diamond cutting machine, polish the incident surface and the exit surface for 20 minutes respectively using corundum powder and a polishing machine, and obtain the Solis photon pump array based on the two-dimensional non-Abelian and Le principle after removing the excess powder.

[0044] The femtosecond laser used has a wavelength of 1030nm, a pulse width of 239fs, and a repetition frequency of 1MHz; the processing laser power is 230mW, the scanning speed is 40mm / s, the structure center depth is 190μm below the surface, and the size of the used Corning glass sample is 10cm×2.5cm×1.1cm.

[0045] Example 2

[0046] The embodiment provides a pumping method of a Solis photon pump array based on a two-dimensional non-Abelian and Le principle, and specifically includes: when test light is input from a first main waveguide 1 of a unit cell (i, j), the test light is pumped to a second main waveguide 2 of the same unit cell via a first straight waveguide 5; when test light is input from the second main waveguide 2 of the unit cell (i, j), the test light is sequentially pumped to a first auxiliary waveguide 3 of a cell (i, j-1) and then pumped to the first main waveguide 1 of the cell (i, j-1), so as to realize energy exchange of the first main waveguide 1 and the second main waveguide 2.

[0047] In the embodiment, the Solis photon pump structure and the processing parameters involved are the same as those in Example 1. The beam propagation equation is solved by MATLAB, and the light propagation process in the sample is simulated and calculated, as shown in Figure 5as shown in (b) of FIG. 8. To test the structure, first adjust the output light of an 808 nm continuous laser to vertical polarization through a polarizer, then focus it on the polished sample end face through a 20x objective, observe the focus position through a CCD, and make the laser focus point align with the main waveguide 1 or 2 to excite the corresponding pumping process; collect the outcoupling surface light intensity distribution pattern through a 40x objective, and project it onto a mode analyzer, and the light passing through the Solis photon pump can be obtained.

[0048] In this embodiment, as shown in (a) of FIG. 8, when light is input from the first main waveguide 1, the light intensity almost appears in the lower left corner of the second main waveguide 2; when light is input from the second main waveguide 2, the light intensity almost appears in the lower right corner of the second main waveguide 2; the above results are consistent with the design target and the curve end result described in (b) of FIG. 8. Figure 6 Figure 5

[0049] Figure 6 In the outcoupling surface light intensity distribution pattern shown, the circular dotted line is the first and second rhombus grid composed of the first and second main waveguides 1 and 2; the triangular dotted line indicates the first and second auxiliary waveguides 3 and 4 involved in the pumping process; the white arrow shows the pumping direction of the light passing through a limited number of couplings; and the "basket" shaped outer frame frames out the unit cell involved in the pumping process shown in the picture, and has been marked by the position coordinates (i, j).

[0050] Embodiment 3

[0051] This embodiment provides another Solis photon pump pumping method based on the two-dimensional non-Abelian and Lie principle, which comprises: when the test light is input from the first main waveguide 1 of the unit cell (i, j), it will be pumped to the second auxiliary waveguide 4 of the cell (i+1, j) in turn, and then pumped to the second main waveguide 2 of the cell (i+1, j+1); when the test light is input from the second main waveguide 2 of the unit cell (i, j), it will be pumped to the first main waveguide 1 through the second straight waveguide 6 of the cell (i-1, j), so as to realize the energy exchange of the first and second main waveguides 1 and 2.

[0052] In this embodiment, the maximum coupling distance, the minimum coupling distance, the number of transverse and longitudinal periods, the number of pumping steps, the propagation length of single-step pumping, and the total size of the device are the same as those in Embodiment 1.

[0053] ​​In this embodiment, the Solis pump is a three-stage pump, divided into three segments along the propagation direction: 0-14mm, 14-28mm, and 28-42mm. The coupling distance between the first main waveguide 1 and the second straight waveguide 6 decreases from 17μm to 5μm in the first segment, increases from 5μm to 17μm in the second segment, and remains unchanged at 17μm in the third segment. The coupling distance between the second main waveguide 2 and the second straight waveguide 6 remains unchanged at 17μm in the first segment, decreases from 17μm to 5μm in the second segment, rapidly increases to 29μm at the end of the segment, and decreases from 29μm to 17μm in the third segment. The coupling distance between the second auxiliary waveguide 4 and the second straight waveguide 6 increases from 5μm to 17μm in the first segment, remains unchanged at 17μm in the second segment, and increases from 17μm to 29μm in the third segment. Since the first straight waveguide 5 and the second straight waveguide 6 are parallel to each other and the spacing between them remains constant at 34μm, the coupling distance between the waveguides and the first straight waveguide 5 can be directly obtained by subtracting the coupling distance between the waveguides and the second straight waveguide 6. Figure 5 (a) shows the relationship between the changes in coupling coefficients corresponding to the changes in the above coupling spacing. All coupling coefficients change linearly.

[0054] In this embodiment, the Solis photonic pump array is prepared by femtosecond laser direct writing technology, and the femtosecond laser parameters, processing parameters, sample parameters, etc. are the same as in Embodiment 1.

[0055] In this embodiment, as Figure 6 As shown in (b), when light is input from the first main waveguide 1, almost all the light intensity appears in the upper left corner of the second main waveguide 2; when light is input from the second main waveguide 2, almost all the light intensity appears in the lower left corner of the second main waveguide 2. These results are consistent with the design objectives and... Figure 5 The endpoint results of the curves described in (b) are all consistent.

[0056] Example 4

[0057] This embodiment provides a cascade method for a two-dimensional non-Abelian photonic pump array with non-Abelian characteristics based on the Solis photonic pump array principle. The method includes: In a first case, device II described in Embodiment 1 and device I described in Embodiment 2 are cascaded sequentially. When test light is input from the first main waveguide 1, it pumps to the first main waveguide 1 in the lower left corner cell, and when it is input from the second main waveguide 2, it pumps to the second main waveguide 2 in the upper right corner cell. In a second case, device II described in Embodiment 2 and device I described in Embodiment 1 are cascaded sequentially. When test light is input from the first main waveguide 1, it pumps to the first main waveguide 1 in the upper right corner cell, and when it is input from the second main waveguide 2, it pumps to the second main waveguide 2 in the lower left corner cell.

[0058] In the embodiment, all the design and processing parameters of the device I, 2 are same as those of the embodiments 1, 2, since the cells of both are "basket" structure, the device can be integrated in the way of directly connecting front and back without too much modification.

[0059] In the embodiment, the test light is input from the first main waveguide 1 and the second main waveguide 2, and the final pump result light intensity energy distribution is shown in (c), (d) of Figure 6 The device completes the above pump process with an efficiency of more than 95%, and the peripheral waveguide has no stray light, showing good transmission effect; the device connection sequence will affect the final pump result, and the experiment also confirms this, which shows that the solis photon pump array has non-commutative property, i.e. non-Abelian property. The non-Abelian property has important significance for complex topological optical calculation, which proves that the method paves the way for high-speed optical calculation chip based on femtosecond laser direct writing large-scale three-dimensional integration.

[0060] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0061] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0062] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed by the present application.

Claims

1. A Solis photonic pump array based on two-dimensional non-Abelian and harmonic principles, characterized in that, The Solis photon pump array is stacked in a close-packed manner in the vertical propagation direction by a plurality of waveguide unit cells; wherein the plurality of waveguide unit cells are all "vegetable basket" structures; the waveguide unit cell comprises a first main waveguide (1), a second main waveguide (2), a first auxiliary waveguide (3), a second auxiliary waveguide (4), a first straight waveguide (5) and a second straight waveguide (6); the first main waveguide (1) is located at the bottom surface of the "vegetable basket" structure, the second main waveguide (2) and the first auxiliary waveguide (3) are respectively located at the two side surfaces of the "vegetable basket" structure, the second auxiliary waveguide (4) is located at the handle surface of the "vegetable basket" structure which is symmetrical to the bottom surface, and the first straight waveguide (5) and the second straight waveguide (6) are respectively located at the two parallel edges of the bottom surface of the "vegetable basket" structure, and the direction is the propagation direction; The first main waveguide (1) in the plurality of waveguide unit cells constitutes a first rhombic grid periodically changing along a diagonal direction, and the second main waveguide (2) in the plurality of waveguide unit cells constitutes a second rhombic grid periodically changing along a diagonal direction. When viewed along one of the 45-degree diagonal lines, the first main waveguide (1) and the second main waveguide (2) appear alternately and the waveguides satisfy the collinearity. The diagonal line is defined as the change direction of the cell position number i, and the other diagonal line perpendicular to the same is defined as the change direction of the position number j. Any point in the first rhombic grid is marked as A ij , and any point in the second rhombic grid is marked as B ij . When the test light is input from any point A ij in the first rhombic grid, it is transmitted to any point B ij in the second rhombic grid after a limited number of coupling transmissions. Conversely, the test light can also be transmitted from any point B ij in the second rhombic grid to any point A ij in the first rhombic grid. Wherein, i and j are both cell position numbers.

2. A Solis photonic pump array based on two-dimensional non-Abelian and harmonic principles as claimed in claim 1, wherein, The lattice spacing of the first rhombic grid and the second rhombic grid is in the range of 40-160λ, and the interlaced layer spacing of the first rhombic grid and the second rhombic grid is in the range of 20-80λ; the spacing d0 of the first straight waveguide (5) and the second straight waveguide (6) is in the range of 30-120λ; wherein λ is the wavelength of the test excitation light of the pump.

3. A Solis photonic pump array based on two-dimensional non-Abelian and harmonic principles as claimed in claim 1, wherein, The first main waveguide (1), the second main waveguide (2), the first auxiliary waveguide (3) and the second auxiliary waveguide (4) evolve in a straight line or a curve in the plane they are located in, and in the evolution process, the spatial distance between the first main waveguide (1), the second main waveguide (2), the first auxiliary waveguide (3) and the second auxiliary waveguide (4) and the first straight waveguide (5) and the second straight waveguide (6) at the edge of the plane is the coupling distance, wherein the maximum coupling distance d1 is in the range of 15-115λ, the minimum coupling distance d2 is in the range of 5-15λ, and d1>d2; since the first straight waveguide (5) and the second straight waveguide (6) are parallel, there is a relationship d1+d2=d0.

4. A Solis photonic pump array based on two-dimensional non-Abelian and harmonic principles as claimed in claim 1, wherein, The overall size of the waveguide unit cell is d0xd0xl tp wherein, l tp is the propagation length of the solitonic pump for each step, ranging from 10 4 -10 5 ; the unit cell adopts two-dimensional plane close-packed in the vertical propagation direction and direct connection in the propagation direction, the lateral period number of the cells of the device is n x , the longitudinal period number is n y , and the step number of the pump in the propagation direction is n tp , so the overall size of the device is n x d0xn y d0xn tp l tp .

5. A method of pumping a Solis photonic pump array based on two-dimensional non-Abelian and harmonic principles as claimed in claim 1, wherein, Specifically includes the following contents: When the test light is input from the first main waveguide (1) of the waveguide unit cell, it will be pumped to the second main waveguide (2) of the same waveguide unit cell through the first straight waveguide (5); when the test light is input from the second main waveguide (2) of the waveguide unit cell, it will be pumped to the first auxiliary waveguide (3) of the lower right corner cell in turn, and then pumped to the first main waveguide (1) of the cell, thereby realizing the energy exchange of the first main waveguide (1) and the second main waveguide (2).

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