Scrambling instrument and method based on piezoelectric ceramics, electronic equipment and storage medium

Abstract

The invention provides a scrambling instrument and method based on piezoelectric ceramics, electronic equipment and a storage medium, and relates to the technical field of optical fiber transmission, the scrambling instrument comprises a polarization beam splitting assembly, the piezoelectric ceramics and a polarization synthesizer PBC, the polarization beam splitting assembly is connected with the piezoelectric ceramics and the PBC, and the piezoelectric ceramics are connected with the PBC; the polarization beam splitting assembly is used for decomposing the polarization direction of the initial polarized light to obtain first polarized light and second polarized light; the piezoelectric ceramic is used for adjusting the phase of the second polarization-state light under the condition that voltage is applied to obtain target polarization-state light; and the PBC is used for carrying out polarization state synthesis on the first polarization state light and the target polarization state light to obtain polarized light after polarization scrambling. According to the invention, the scrambling cost and the required driving voltage are reduced, and the size of equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber transmission technology, and in particular to a polarization scrambler, method, electronic equipment and storage medium based on piezoelectric ceramics. Background Art

[0002] In the Brillouin Optical Time Domain Analysis (BOTDA) system and the Brillouin Optical Time Domain Reflectometry (BOTDR) system, in order to reduce the impact of polarization fading noise on the system, it is necessary to scramble the polarized light. The existing scrambling technologies are divided into two categories: passive scrambling and active scrambling.

[0003] However, in order to ensure the effect of polarization scrambling, the existing passive polarization scrambling requires a long distance of polarization-maintaining optical fiber and a plurality of piezoelectric ceramics, resulting in the problems of high cost and large equipment size in the existing polarization scrambling technology. Summary of the invention

[0004] The present invention provides a polarization scrambler, method, electronic device and storage medium based on piezoelectric ceramics, which are used to solve the defects of high polarization scrambling cost and large equipment size caused by long-distance polarization-maintaining optical fiber and multiple piezoelectric ceramics in the prior art, thereby reducing the cost and size of the equipment, and only needs to apply voltage to one piezoelectric ceramic, thereby reducing the required driving voltage.

[0005] The present invention provides a polarization scrambler based on piezoelectric ceramics, comprising: a polarization beam splitting component, a piezoelectric ceramic and a polarization synthesizer PBC, wherein the polarization beam splitting component is connected to the piezoelectric ceramic and the PBC respectively, and the piezoelectric ceramic is connected to the PBC; The polarization beam splitting component is used to decompose the polarization direction of the initial polarized light to obtain a first polarization state light and a second polarization state light; the direction of the first polarization state light is perpendicular to the direction of the second polarization state light; The piezoelectric ceramic is used to adjust the phase of the second polarization state light to obtain the target polarization state light when a voltage is applied; The PBC is used to synthesize the polarization states of the first polarization state light and the target polarization state light to obtain scrambled polarized light.

[0006] According to a piezoelectric ceramic-based polarization scrambler provided by the present invention, the polarization beam splitting component includes a power holding unit and a polarization beam splitter PBS, wherein the power holding unit is connected to the PBS, and the PBS is respectively connected to the piezoelectric ceramic and the PBC; the PBS is used to split the polarization direction of the initial polarized light to obtain the first polarization state light and the second polarization state light; the power holding unit is used to maintain the difference between the optical power of the first polarization state light and the optical power of the second polarization state light to meet a preset difference.

[0007] According to a polarization scrambler based on piezoelectric ceramics provided by the present invention, the power maintaining unit includes a first polarization-maintaining fiber and a second polarization-maintaining fiber, wherein the first polarization-maintaining fiber and the second polarization-maintaining fiber are fused at a preset angle, and the preset angle is an angle that maintains the difference between the optical power of the first polarization state light and the optical power of the second polarization state light to meet the preset difference.

[0008] A polarization scrambler based on piezoelectric ceramics provided in accordance with the present invention also includes a third polarization-maintaining fiber and a fourth polarization-maintaining fiber, the length of the third polarization-maintaining fiber is the same as the length of the fourth polarization-maintaining fiber, wherein the third polarization-maintaining fiber is respectively connected to the polarization beam splitting component and the PBC, and the fourth polarization-maintaining fiber is wound on the piezoelectric ceramic and has its two ends respectively connected to the polarization beam splitting component and the PBC; the third polarization-maintaining fiber is used to transmit the first polarization state light; the fourth polarization-maintaining fiber is used to transmit the target polarization state light.

[0009] According to a polarization scrambler based on piezoelectric ceramics provided by the present invention, a voltage applied to the piezoelectric ceramics is greater than a preset voltage, and the preset voltage is determined based on an outer diameter of the piezoelectric ceramics, a length of the fourth polarization-maintaining optical fiber, and a phase difference between the target polarization state light and the first polarization state light.

[0010] The present invention further provides a polarization scrambling method based on piezoelectric ceramics, which is applied to the polarization scrambling instrument based on piezoelectric ceramics, comprising: Obtaining initial polarized light; Splitting the polarization direction of the initial polarized light by a polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light; The phase of the second polarization state light is adjusted by the piezoelectric ceramic in the polarization scrambler under the condition of applying voltage to obtain the target polarization state light; The first polarization state light and the target polarization state light are polarization-synthesized by the PBC in the polarization scrambler to obtain scrambled polarized light.

[0011] According to a polarization scrambling method based on piezoelectric ceramics provided by the present invention, the polarization beam splitting component includes a power holding unit and a polarization beam splitter PBS, and the polarization direction of the initial polarized light is decomposed by the polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light, including: determining a first amplitude corresponding to the first polarization state light and a second amplitude corresponding to the second polarization state light by the power holding unit; and splitting the polarization direction of the initial polarized light based on the first amplitude and the second amplitude by the PBS to obtain the first polarization state light and the second polarization state light.

[0012] According to a polarization scrambling method based on piezoelectric ceramics provided by the present invention, the polarization scrambler also includes a third polarization-maintaining fiber and a fourth polarization-maintaining fiber, the length of the third polarization-maintaining fiber is the same as the length of the fourth polarization-maintaining fiber, and the piezoelectric ceramics in the polarization scrambler adjust the phase of the second polarization state light under the condition of applying voltage to obtain the target polarization state light. The method also includes: transmitting the first polarization state light to the PBC through the third polarization-maintaining fiber; transmitting the target polarization state light to the PBC through the fourth polarization-maintaining fiber.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the piezoelectric ceramic-based polarization scrambling method described above is implemented.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the piezoelectric ceramic-based polarization scrambling method described above is implemented.

[0015] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the piezoelectric ceramic-based polarization scrambling method described above is implemented.

[0016] The polarization scrambler, method, electronic device and storage medium based on piezoelectric ceramics provided by the present invention are obtained by connecting the polarization beam splitter component to the piezoelectric ceramics and the polarization combiner (Polarization Beam Combiner, PBC) respectively, and the piezoelectric ceramics to the polarization combiner to obtain the polarization scrambler. First, the polarization direction of the initial polarized light is decomposed by the polarization beam splitter component to obtain the first polarization state light and the second polarization state light; then, when a voltage is applied to the piezoelectric ceramic, the phase of the second polarization state light is adjusted to obtain the target polarization state light; finally, the target polarization state light and the first polarization state light are polarization-synthesized by the PBC to obtain the polarized light after polarization scrambling. In this way, polarization scrambling of polarized light can be achieved by a piezoelectric ceramic, a polarization beam splitter component and a PBC, which significantly reduces the cost and reduces the size of the device. In addition, only a voltage needs to be applied to one piezoelectric ceramic, which reduces the required driving voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of distributed optical fiber sensing implementation provided by the prior art.

[0019] Figure 2 It is a schematic structural diagram of the polarization scrambler based on piezoelectric ceramics provided by the present invention.

[0020] Figure 3 It is a schematic flow chart of the polarization scrambling method based on piezoelectric ceramics provided by the present invention.

[0021] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention.

[0022] Reference numerals: 101: signal transceiver device; 102: optical fiber; 103: optical pulse; 104: backscattered signal; 200: polarization scrambler based on piezoelectric ceramics; 210: polarization beam splitting component; 220: piezoelectric ceramics; 230: polarization combiner PBC; 211: power holding unit; 212: polarization beam splitter PBS; 240: third polarization-maintaining optical fiber; 250: fourth polarization-maintaining optical fiber. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Fiber optic sensing technology uses the characteristic that changes in the phase, intensity, frequency and other characteristics of light caused by changes in the external environment to transmit information. Among various fiber optic sensing technologies, distributed fiber optic sensing technology can sense changes in environmental parameters (such as temperature, strain, etc.) at each fiber position along a fiber line of tens of kilometers. It is the most promising solution for many scenarios such as geological disaster warning, security defense of important facilities, and infrastructure structure safety monitoring. Optical fiber is both a transmission medium and a sensing medium, with the advantages of light weight, small size, good insulation, anti-electromagnetic interference, high temperature resistance, and corrosion resistance.

[0025] Figure 1 This is a schematic diagram of distributed optical fiber sensing provided by the prior art. Figure 1 As shown, it includes a signal transceiver device 101 and an optical fiber 102 (i.e. Figure 1 The orange line in the middle connects the signal transceiver device 101 to one end of the optical fiber 102, and the signal transceiver device 101 sends an optical pulse 103 to the optical fiber 102 (i.e. Figure 1 The optical fiber 102 is a fiber optic sensor that generates a backscattered signal 104 (the red arrow in the figure) and collects and analyzes the backscattered signal 104 (the red arrow in the figure) generated by the optical pulse 103 along the optical fiber 102 to determine abnormal events along the optical fiber (such as intrusion). Distributed optical fiber sensing technology can be based on three types of backscattering: Rayleigh scattering, Raman scattering and Brillouin scattering. Among them, the system based on Brillouin scattering to achieve sensing includes the Brillouin optical time domain analyzer (BOTDA) system based on stimulated Brillouin scattering and the Brillouin optical time domain reflectometer (BOTDR) system based on spontaneous Brillouin scattering, which has the characteristics of being able to measure temperature and strain changes over a large dynamic range.

[0026] Both BOTDR and BOTDA systems require the injection of pulsed light into the optical fiber. In order to reduce the impact of polarization fading noise on the system, the optical pulses need to be scrambled. Existing scrambling technologies are divided into two categories: passive scrambling and active scrambling. Among them, passive scrambling relies on passive devices and achieves random changes in the polarization state of the optical signal through a specific optical structure. At present, the mechanism of passive scrambling determines that it can only be used to scramble continuous light. Active scrambling uses voltage to drive the crystal to actively disrupt the polarization state of light, so that the polarization state of the optical signal changes randomly over time. Currently, all commercially available polarization scramblers are active scramblers, and support scrambling of both continuous light and pulsed light. There are currently three main types of commercially available active polarization scramblers: lithium niobate crystal scramblers, columnar piezoelectric ceramic resonant scramblers, and fiber extrusion scramblers. The corresponding defects of each scrambler are as follows: 1. Passive polarization scramblers cannot support pulse polarization scrambling, and passive polarization scrambler systems usually require the use of long-distance polarization-maintaining fibers, the specific length of which is related to the line width of the light source in the use scenario. Long-distance polarization-maintaining fibers increase the cost and volume of the instrument.

[0027] 2. The lithium niobate crystal polarization scrambler in active polarization scrambling uses the electro-optical effect of lithium niobate crystals to change its refractive index by applying an electric field outside the crystal. When light passes through the crystal, the external changing electric field causes the refractive index of the crystal to change accordingly, thereby changing the polarization state of the light beam. Since the light enters and exits the interface between the optical fiber and the crystal many times when passing through the polarization scrambler, the insertion loss is large. Another major disadvantage is that it usually requires a higher voltage value to drive. In addition, the lithium niobate crystal polarization scrambler is complex to manufacture and has a high cost. It is also suitable for a relatively small operating temperature range. In addition, the polarization scrambler has high requirements for the polarization state of the incident light. When the polarization direction of the incident light is at a 45-degree angle to the direction of the external electric field of the crystal, the polarization scrambling effect is best. However, in practical applications, the ideal polarization state is difficult to achieve. To solve this problem, multi-stage crystal devices can be used and connected in series at different electric field angles. However, this solution will further increase the insertion loss and significantly increase the manufacturing cost.

[0028] 3. The main principle of the cylindrical piezoelectric ceramic resonant polarization scrambler in active polarization scrambling is: the optical fiber is wound on the cylindrical piezoelectric ceramic, and by applying voltage to the piezoelectric ceramic, the piezoelectric ceramic is deformed, which in turn causes the optical fiber to be stretched, resulting in a change in the polarization state of the transmitted light beam. When the voltage change frequency matches the resonant frequency of the cylindrical piezoelectric ceramic, the working efficiency of the polarization scrambler reaches the highest level. In practical applications, since the polarization scrambling effect of a single cylindrical piezoelectric ceramic is easily affected by the initial polarization state of the incident light, three cylindrical piezoelectric ceramics are usually used in series to reduce the polarization sensitivity of the polarization scrambler. Its disadvantages are that it is large in size, has a low polarization scrambling rate, and requires a large number of piezoelectric ceramics.

[0029] 4. The structure of the fiber squeezing type polarization scrambler in active polarization scrambling is: two piezoelectric ceramics are placed on both sides of the optical fiber. When voltage is applied to the piezoelectric ceramics, the piezoelectric ceramics squeeze the optical fiber to achieve polarization modulation. This polarization scrambler usually connects four piezoelectric ceramic squeezing units in series to eliminate the influence on the polarization sensitivity of the incident light. Its disadvantage is that a large number of piezoelectric ceramics are required.

[0030] In view of the above-mentioned problems, the present invention provides a polarization scrambler based on piezoelectric ceramics, which realizes polarization scrambling of polarized light through a piezoelectric ceramic, a polarization beam splitter component and a PBC, significantly reducing the cost and the size of the equipment. In addition, it only needs to apply voltage to one piezoelectric ceramic, reducing the required driving voltage.

[0031] Combine the following Figure 2 The present invention describes a polarization scrambler based on piezoelectric ceramics, which can realize polarization scrambling of direct current light and pulse light.

[0032] Figure 2 Schematic diagram of the structure of the polarization scrambler based on piezoelectric ceramics provided by the present invention, such as Figure 2 As shown, the polarization scrambler 200 based on piezoelectric ceramics includes: a polarization beam splitter component 210, a piezoelectric ceramic (PZT) 220 and a polarization synthesizer PBC230, wherein the polarization beam splitter component 210 is connected to the piezoelectric ceramic 220 and the PBC230 respectively, and the piezoelectric ceramic 220 is connected to the PBC230; The polarization beam splitting component 210 is used to decompose the polarization direction of the initial polarized light to obtain a first polarization state light and a second polarization state light; the direction of the first polarization state light is perpendicular to the direction of the second polarization state light; The piezoelectric ceramic 220 is used to adjust the phase of the second polarization state light to obtain the target polarization state light when a voltage is applied; The PBC230 is used to perform polarization state synthesis on the first polarization state light and the target polarization state light to obtain scrambled polarized light.

[0033] Here, the polarized light may be direct current light or pulse light.

[0034] Here, the first polarized light may be parallel polarized light or vertical polarized light. If the first polarized light is parallel polarized light, the second polarized light is vertical polarized light; if the first polarized light is vertical polarized light, the second polarized light is parallel polarized light.

[0035] Furthermore, if the second polarization state light is parallel polarization state light, the piezoelectric ceramic adjusts the phase of the parallel polarization state light; if the second polarization state light is vertical polarization state light, the piezoelectric ceramic adjusts the phase of the vertical polarization state light.

[0036] Here, the polarization beam splitting component 210, the piezoelectric ceramic 220 and the PBC 230 may be connected by using a polarization-maintaining optical fiber or a single-mode optical fiber.

[0037] Here, the polarizing beam splitting assembly 210 may include only a polarizing beam splitter (PBS 212 ), or may include the PBS 212 and other components.

[0038] It should be noted that after voltage is applied to the piezoelectric ceramic 220 , the piezoelectric ceramic 220 will continue to deform, and the optical fiber wound on the piezoelectric ceramic 220 will be continuously stretched, so that the phase of the second polarization state light in the optical fiber is adjusted to obtain the target polarization state light.

[0039] Here, the piezoelectric ceramic 220 may be a lead zirconate titanate piezoelectric ceramic, and the parameters of the piezoelectric ceramic 220 may include an outer diameter of PZT, a radial displacement piezoelectric constant, a driving voltage, a strain sensitivity coefficient, and a length of light wound around PZT.

[0040] Here, the method of applying voltage to the piezoelectric ceramic 220 may be any appropriate method, such as a function signal generator or an arbitrary signal generator.

[0041] For example, the minimum parameter requirements for the piezoelectric ceramic 220 may be that the outer diameter of the PZT is 40 millimeters (mm), the radial displacement piezoelectric constant is -240 picometers / volt ( pm / V), driving voltage 3.68V, strain sensitivity coefficient 110 product of strain and characteristic length / radian angle ( ), the length of the optical fiber wound on the PZT is 40 meters (m).

[0042] For example, Figure 2 As shown, the polarization beam splitting component 210 includes a power holding unit 211 and a polarization beam splitter PBS212, wherein the power holding unit 211 is connected to the PBS212, and the PBS212 is respectively connected to the piezoelectric ceramic 220 and the PBC230; the PBS212 is used to split the polarization direction of the initial polarized light to obtain the first polarization state light and the second polarization state light; the power holding unit 211 is used to maintain the difference between the optical power of the first polarization state light and the optical power of the second polarization state light to meet the preset difference.

[0043] Here, the power holding unit 211 may be obtained by fusing two sections of polarization-maintaining optical fibers at a preset angle.

[0044] It should be noted that optical power can be measured using an optical power meter.

[0045] Exemplarily, the upper branch of PBS212 (i.e., the light in the first polarization state) is parallel polarization state light, and the lower branch (i.e., the light in the second polarization state) is vertical polarization state light. The electric vector of the parallel polarization state light is It is expressed as the following formula (1): (1) in, yes The amplitude of the branch electric vector component in the direction, Indicates frequency, Indicates time, represents the wave number, Coordinate axis direction, represents the propagation factor, Represents the phase of the first polarization state light.

[0046] The electric vector of the vertically polarized light in the lower branch of PBS212 It is expressed as the following formula (2): (2) in, yes The amplitude of the branch electric vector component in the direction, Represents the phase of the second polarization state light.

[0047] The phase difference between the first polarization state light and the second polarization state light is It is expressed as the following formula (3): (3) Here, the power holding unit 211 may be connected to the PBS 212 via a polarization-maintaining optical fiber, or may be integrated in the PBS 212 .

[0048] Here, the preset difference value may be any appropriate value, such as 0 or a value close to 0. Generally, the closer the difference value is to 0, the closer the optical power of the light in the first polarization state is to the optical power of the light in the second polarization state.

[0049] In the embodiment of the present invention, the power holding unit 211 ensures that the decomposed first polarization state light and second polarization state light have equal power, thereby improving the efficiency and accuracy of the reflectometer system or the analyzer system.

[0050] In the embodiment of the present invention, the polarization beam splitter 210 is connected to the piezoelectric ceramic 220 and the PBC respectively, and the piezoelectric ceramic 220 is connected to the polarization synthesizer to obtain a polarization scrambler. First, the polarization direction of the initial polarized light is decomposed by the polarization beam splitter 210 to obtain the first polarization state light and the second polarization state light; then, when the voltage is applied to the piezoelectric ceramic 220, the phase of the second polarization state light is adjusted to obtain the target polarization state light; finally, the first polarization state light and the target polarization state light are polarization-synthesized by the PBC to obtain the polarized light after polarization scrambling. In this way, polarized light can be scrambled by a piezoelectric ceramic 220, a polarization beam splitter 210 and a PBC230, which significantly reduces the cost and reduces the size of the device. In addition, only a voltage needs to be applied to one piezoelectric ceramic 220, which reduces the required driving voltage.

[0051] Further, the power maintaining unit 211 includes a first polarization-maintaining optical fiber and a second polarization-maintaining optical fiber, wherein the first polarization-maintaining optical fiber and the second polarization-maintaining optical fiber are fused at a preset angle, and the preset angle is an angle that maintains the difference between the optical power of the first polarization state light and the optical power of the second polarization state light to meet a preset difference.

[0052] Here, the preset angle can be any suitable angle, such as 45 degrees or an angle close to 45 degrees. Generally, the closer the preset angle is to 45 degrees, the closer the powers of the first polarization state light and the second polarization state light are. When the first polarization-maintaining fiber and the second polarization-maintaining fiber are fused at 45 degrees, the powers of the first polarization state light and the second polarization state light are consistent. Therefore, in order to ensure that the power of the first polarization state light and the power of the second polarization state light after decomposition by PBS212 are consistent, the preset angle can be set to 45 degrees.

[0053] In the embodiment of the present invention, the structure of the polarization scrambler is formed by using polarization-maintaining fiber, PBC, PBS212 and voltage ceramics, so that polarized light does not need to enter and exit the interface between the fiber and the crystal multiple times, thereby reducing the insertion loss of the polarization scrambler.

[0054] Further, if Figure 2 As shown, the piezoelectric ceramic-based polarization scrambler also includes a third polarization-maintaining fiber 240 and a fourth polarization-maintaining fiber 250, wherein the length of the third polarization-maintaining fiber 240 is the same as that of the fourth polarization-maintaining fiber 250, wherein the third polarization-maintaining fiber 240 is respectively connected to the polarization beam splitting component 210 and the PBC230, and the fourth polarization-maintaining fiber 250 is wound on the piezoelectric ceramic 220 and has its two ends respectively connected to the polarization beam splitting component 210 and the PBC230; the third polarization-maintaining fiber 240 is used to transmit the first polarization state light; the fourth polarization-maintaining fiber 250 is used to transmit the target polarization state light.

[0055] It should be noted that, in order to achieve sufficient polarization scrambling, the piezoelectric ceramic 220 needs to make the difference between the phase of the first polarization state light and the phase of the target polarization state light greater than or equal to 8π.

[0056] It should be noted that when the polarization beam splitting component 210 decomposes the polarized light into the first polarization state light and the second polarization state light, the target polarization state light is transmitted through the third polarization-maintaining optical fiber 240, and the second polarization state light is transmitted through the fourth polarization-maintaining optical fiber 250. In addition, the PZT on the fourth polarization-maintaining optical fiber 250 is deformed by applying voltage, and the fourth polarization-maintaining optical fiber 250 is stretched to change the phase of the first polarization state light to obtain the target polarization state light. Then, the PBC synthesizes the polarization states of the first polarization state light and the target polarization state light to obtain the scrambled polarized light.

[0057] In the embodiment of the present invention, the structure of the polarization scrambler is formed by using polarization-maintaining fiber, PBC, PBS212 and voltage ceramics, which eliminates the need for polarized light to enter and exit the interface between the optical fiber and the crystal multiple times, thereby reducing the insertion loss of the polarization scrambler. Compared with lithium niobate crystals with higher driving voltage and limited operating temperature range, the required driving voltage is reduced and the applicable operating temperature is expanded.

[0058] Furthermore, the voltage applied to the piezoelectric ceramic 220 is greater than a preset voltage, and the preset voltage is determined based on the outer diameter of the piezoelectric ceramic 220, the length of the fourth polarization-maintaining optical fiber 250, and the phase difference between the target polarization state light and the first polarization state light.

[0059] Here, the preset voltage can be the ratio of the first value to the second value. The first value can be the product of the phase difference, the outer diameter of the PZT and the strain sensitivity coefficient of the optical fiber, or the weighted product of the three; the second value can be the product of the piezoelectric constant of the radial displacement and the optical fiber length, or the weighted product of the two.

[0060] Exemplarily, the preset voltage V is calculated as follows: (4) in, is the outer diameter of PZT, is the strain sensitivity coefficient of the optical fiber, is the piezoelectric constant for radially varying displacement, is the length of the optical fiber wound around the PZT.

[0061] In the embodiment of the present invention, the structure of the polarization scrambler is formed by using polarization-maintaining fiber, PBC, PBS212 and voltage ceramics, which eliminates the need for polarized light to enter and exit the interface between the optical fiber and the crystal multiple times, thereby reducing the insertion loss of the polarization scrambler. Compared with lithium niobate crystals with higher driving voltage and limited operating temperature range, the required driving voltage is reduced and the applicable operating temperature is expanded.

[0062] The polarization scrambling method based on piezoelectric ceramics provided by the present invention is described below. The polarization scrambling method based on piezoelectric ceramics described below and the polarization scrambling instrument based on piezoelectric ceramics described above can correspond to each other.

[0063] Figure 3 Schematic diagram of the process of the polarization scrambling method based on piezoelectric ceramics provided by the present invention, which is applied to the polarization scrambling instrument based on piezoelectric ceramics, such as Figure 3 As shown, the method includes: Step 301: Obtain initial polarized light.

[0064] Step 302: Split the polarization direction of the initial polarized light by a polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light.

[0065] The direction of the first polarization state light is perpendicular to the direction of the second polarization state light.

[0066] Step 303: Adjust the phase of the second polarization state light by applying voltage through the piezoelectric ceramic in the polarization scrambler to obtain the target polarization state light.

[0067] Step 304: synthesize the polarization states of the first polarization state light and the target polarization state light through the PBC in the polarization scrambler to obtain scrambled polarized light.

[0068] Furthermore, the polarization beam splitting component includes a power holding unit and a polarization beam splitter PBS, and the polarization direction of the initial polarized light is decomposed by the polarization beam splitting component in the polarization scrambler to obtain the first polarization state light and the second polarization state light, including: Determine, by the power holding unit, a first amplitude corresponding to the first polarization state light and a second amplitude corresponding to the second polarization state light; The PBS splits the polarization direction of the initial polarized light based on the first amplitude and the second amplitude to obtain the first polarization state light and the second polarization state light.

[0069] Furthermore, the polarization scrambler further comprises a third polarization-maintaining optical fiber and a fourth polarization-maintaining optical fiber, and the length of the third polarization-maintaining optical fiber is the same as the length of the fourth polarization-maintaining optical fiber. After the phase of the second polarization state light is adjusted by the piezoelectric ceramic in the polarization scrambler under the condition of applying voltage to obtain the target polarization state light, the method further includes: Transmitting the first polarization state light to the PBC through the third polarization-maintaining optical fiber; The target polarization state light is transmitted to the PBC through the fourth polarization-maintaining optical fiber.

[0070] Figure 4 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the polarization scrambling method based on piezoelectric ceramics, the method comprising: obtaining initial polarized light; splitting the polarization direction of the initial polarized light by the polarization beam splitting component in the polarization scrambler to obtain a first polarization state light and a second polarization state light; adjusting the phase of the second polarization state light by the piezoelectric ceramic in the polarization scrambler under the condition of applying voltage to obtain a target polarization state light; synthesizing the polarization state of the first polarization state light and the target polarization state light by the PBC in the polarization scrambler to obtain the polarized light after polarization scrambling.

[0071] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0072] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the piezoelectric ceramic-based polarization scrambling method provided by the above-mentioned methods, and the method includes: obtaining initial polarized light; splitting the polarization direction of the initial polarized light through the polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light; adjusting the phase of the second polarization state light under the application of voltage through the piezoelectric ceramic in the polarization scrambler to obtain a target polarization state light; and synthesizing the polarization state of the first polarization state light and the target polarization state light through the PBC in the polarization scrambler to obtain the polarized light after polarization.

[0073] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the polarization scrambling method based on piezoelectric ceramics provided by the above-mentioned methods, the method comprising: obtaining initial polarized light; splitting the polarization direction of the initial polarized light by a polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light; adjusting the phase of the second polarization state light by applying a voltage through the piezoelectric ceramics in the polarization scrambler to obtain a target polarization state light; and synthesizing the polarization state of the first polarization state light and the target polarization state light by the PBC in the polarization scrambler to obtain the scrambled polarized light.

[0074] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0075] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A polarization scrambler based on piezoelectric ceramics, characterized in that: include: A polarization beam splitter component, a piezoelectric ceramic and a polarization combiner PBC, wherein the polarization beam splitter component is connected to the piezoelectric ceramic and the PBC respectively, and the piezoelectric ceramic is connected to the PBC; The polarization beam splitting component is used to decompose the polarization direction of the initial polarized light to obtain a first polarization state light and a second polarization state light; the direction of the first polarization state light is perpendicular to the direction of the second polarization state light; The piezoelectric ceramic is used to adjust the phase of the second polarization state light to obtain the target polarization state light when a voltage is applied; The PBC is used to synthesize the polarization states of the first polarization state light and the target polarization state light to obtain scrambled polarized light.

2. The polarization scrambler based on piezoelectric ceramics according to claim 1, characterized in that: The polarization beam splitting assembly comprises a power holding unit and a polarization beam splitter PBS, wherein the power holding unit is connected to the PBS, and the PBS is respectively connected to the piezoelectric ceramic and the PBC; The PBS is used to split the polarization direction of the initial polarized light to obtain the first polarization state light and the second polarization state light; The power maintaining unit is used to maintain that the difference between the optical power of the first polarization state light and the optical power of the second polarization state light meets a preset difference.

3. The polarization scrambler based on piezoelectric ceramics according to claim 2, characterized in that: The power maintaining unit includes a first polarization-maintaining optical fiber and a second polarization-maintaining optical fiber, wherein the first polarization-maintaining optical fiber and the second polarization-maintaining optical fiber are fused at a preset angle, and the preset angle is an angle that maintains the difference between the optical power of the first polarization state light and the optical power of the second polarization state light to meet the preset difference.

4. The polarization scrambler based on piezoelectric ceramics according to any one of claims 1 to 3, characterized in that: It also includes a third polarization-maintaining optical fiber and a fourth polarization-maintaining optical fiber, the length of the third polarization-maintaining optical fiber is the same as the length of the fourth polarization-maintaining optical fiber, wherein the third polarization-maintaining optical fiber is respectively connected to the polarization beam splitting component and the PBC, and the fourth polarization-maintaining optical fiber is wound on the piezoelectric ceramic and has two ends respectively connected to the polarization beam splitting component and the PBC; The third polarization-maintaining optical fiber is used to transmit the first polarization state light; The fourth polarization-maintaining optical fiber is used to transmit the target polarization state light.

5. The polarization scrambler based on piezoelectric ceramics according to claim 4, characterized in that: The voltage applied to the piezoelectric ceramic is greater than a preset voltage, and the preset voltage is determined based on an outer diameter of the piezoelectric ceramic, a length of the fourth polarization-maintaining optical fiber, and a phase difference between the target polarization state light and the first polarization state light.

6. A method for polarization disturbance based on piezoelectric ceramics, characterized in that: The polarization scrambler based on piezoelectric ceramics as claimed in claim 1 above comprises: Obtaining initial polarized light; The polarization direction of the initial polarized light is split by a polarization beam splitter in the polarization scrambler to obtain a first polarization state light and a second polarization state light; the direction of the first polarization state light is perpendicular to the direction of the second polarization state light; The phase of the second polarization state light is adjusted by the piezoelectric ceramic in the polarization scrambler under the condition of applying voltage to obtain the target polarization state light; The first polarization state light and the target polarization state light are polarization-synthesized by the PBC in the polarization scrambler to obtain scrambled polarized light.

7. The method for polarization scrambling based on piezoelectric ceramics according to claim 6, characterized in that: The polarization beam splitting component includes a power holding unit and a polarization beam splitter PBS, and the polarization direction of the initial polarized light is decomposed by the polarization beam splitting component in the polarization scrambler to obtain a first polarization state light and a second polarization state light, including: Determine, by the power holding unit, a first amplitude corresponding to the first polarization state light and a second amplitude corresponding to the second polarization state light; The PBS splits the polarization direction of the initial polarized light based on the first amplitude and the second amplitude to obtain the first polarization state light and the second polarization state light.

8. The method for polarization scrambling based on piezoelectric ceramics according to claim 6 or 7, characterized in that: The polarization scrambler further includes a third polarization-maintaining optical fiber and a fourth polarization-maintaining optical fiber, the length of the third polarization-maintaining optical fiber is the same as the length of the fourth polarization-maintaining optical fiber, After the phase of the second polarization state light is adjusted by the piezoelectric ceramic in the polarization scrambler under the condition of applying voltage to obtain the target polarization state light, the method further includes: Transmitting the first polarization state light to the PBC through the third polarization-maintaining optical fiber; The target polarization state light is transmitted to the PBC through the fourth polarization-maintaining optical fiber.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the piezoelectric ceramic-based polarization scrambling method according to any one of claims 6 to 8 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the piezoelectric ceramic-based polarization scrambling method according to any one of claims 6 to 8 is implemented.

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