Polarization extinction measurement control device for thermal power generation

Abstract

Provided is a polarization extinction measurement control device for thermal power generation that can truly simulate various polarization states of light and achieve grating phase control and extinction adjustment control. 【Solution means】The polarization extinction measurement control device for thermal power generation includes a first waveplate polarization knob connected to a single-chip computer, a second waveplate polarization knob, a first optical fiber ring polarization knob, and a second optical fiber ring polarization knob. A plurality of wavelength plates with adjustable angles are provided between the first waveplate polarization knob and the second waveplate polarization knob. The wavelength plates are located within the electric field range, and the electric field is perpendicular to the light propagation direction. A plurality of optical fiber rings are provided between the first optical fiber ring polarization knob and the second optical fiber ring polarization knob. By controlling the first and second waveplate polarization knobs and the first and second optical fiber ring polarization knobs correspondingly by the single-chip computer, self-tuning of the polarization state of light is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of optical signal polarization control, and particularly to a polarization extinction measurement control device for thermal power generation.

Background Art

[0002] In actual life, since the human eye cannot distinguish the polarization state of light, it is necessary to use equipment to analyze the polarization characteristics of optical signals. By measuring the polarization characteristics and analyzing the influence on the performance of the optical system, various operations can be completed. The polarization of light is widely applied in science and technology and industrial production. For example, in the machinery industry, the interference of polarization is used to analyze the distribution of internal stress in mechanical parts. It is also possible to measure the concentration of a solution using polarization and to realize a polarization microscope using the interference characteristics of polarization. It can be said that the polarization of light has important applications in fields such as biology, medicine, and geology.

[0003] In an ideal optical fiber, the polarization state of the transmitted light does not change. However, in a standard communication optical fiber actually in use, the polarization state of the transmitted light continuously changes along the optical fiber. The reason for this change is the irregular birefringence caused by factors such as thermal stress, mechanical stress, and irregularities in the optical fiber core in the optical fiber. Since the birefringence effect of the optical fiber changes due to temperature, pressure, stress, and other environmental factors, the unpredictability of polarization-dependent damage is greatly increased. Since polarization-dependent damage changes over time, the method for removing it must also be dynamic and adaptable to random changes. However, most optical signals are transmitted over long distances, and due to material problems, structural problems, etc., the optical signals experience various losses. In existing research, it is difficult to truly simulate various polarization states of optical signals in industrial sites, and lattice phase control and extinction detection cannot be realized, so it does not lead to accurate and effective measurement and analysis of the polarization characteristics of optical signals.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to provide a polarization extinction measurement control device for thermal power generation that can truly simulate various polarization states of light and achieve grating phase control and extinction adjustment control in order to overcome the drawbacks of the above-mentioned prior art.

[0005] The object of the present invention can be achieved by the following technical solutions. A polarization extinction measurement control device for thermal power generation, comprising a first waveplate polarization knob and a second waveplate polarization knob connected to a single-chip computer, between the first waveplate polarization knob and the second waveplate polarization knob, a plurality of wavelength plates with adjustable angles are provided, the wavelength plates are located within an electric field range, the electric field is perpendicular to the light propagation direction, the single-chip computer is also connected to a first optical fiber ribbon polarization knob and a second optical fiber ribbon polarization knob, between the first optical fiber ribbon polarization knob and the second optical fiber ribbon polarization knob, a plurality of optical fiber ribbons are provided, and by the single-chip computer controlling the first waveplate polarization knob, the second waveplate polarization knob, and the first optical fiber ribbon polarization knob and the second optical fiber ribbon polarization knob correspondingly, self-tuning of the polarization state of light is realized.

[0006] Furthermore, the plurality of wavelength plates are attached to the same wavelength plate axis, the outer shell of the wavelength plate axis is coated with a conductive electrode, and the conductive electrode forms an electric field perpendicular to the light propagation direction under the action of the ring electrode.

[0007] Furthermore, the bare optical fibers at the output ends of the plurality of wavelength plates are connected to an optical fiber sleeve via an output connector, and the optical fiber sleeve is connected to the input ends of a plurality of optical fiber ribbons via an input connector.

[0008] Furthermore, the plurality of optical fiber ribbons are attached to the same base, and both ends of the base are respectively connected to the first optical fiber ribbon polarization knob and the second optical fiber ribbon polarization knob.

[0009] Furthermore, the output ends of the plurality of optical fiber splicings are connected to an image display device for displaying the polarization state signal of light.

[0010] Furthermore, the image display device is connected to a single-chip computer.

[0011] Furthermore, the single-chip computer employs an embedded system ARM controller.

[0012] Compared with the prior art, the present invention has the following advantages.

[0013] In the present invention, a single-chip computer is connected to a first waveplate polarization knob and a second waveplate polarization knob, a plurality of waveplates with adjustable angles are arranged between the first waveplate polarization knob and the second waveplate polarization knob, and the waveplates are arranged in an electric field perpendicular to the light propagation direction. Also, the single-chip computer is connected to a first optical fiber splicing polarization knob and a second optical fiber splicing polarization knob, a plurality of optical fiber splicings are arranged between the first optical fiber splicing polarization knob and the second optical fiber splicing polarization knob, and by appropriately controlling the first waveplate polarization knob, the second waveplate polarization knob, the first optical fiber splicing polarization knob, and the second optical fiber splicing polarization knob using the single-chip computer, self-tuning of the polarization state of light can be realized, various polarization states of light can be truly simulated, and lattice phase control can be realized by constructing a delay ring using a plurality of optical fiber splicings. Furthermore, the single-chip computer can be used for feedback adjustment to achieve the effect of an optimal extinction ratio.

[0014] By attaching a plurality of wave plates to the same wave plate axis, it is possible to ensure that the original incident light and the emitted light from the light source are on the same plane. By adjusting the first and second wave plate polarization knobs, the angle of the wave plate is changed, and the polarization state in the lateral direction is changed. A conductive electrode is coated on the outer shell of the wave plate axis, and an electric field perpendicular to the light propagation direction is formed by the action of the ring electrode. By the combined action of the electric field and the wave plate, the birefringence of light under uniaxial conditions is completed, and the simulation in the industrial field is better realized.

[0015] The present invention installs a plurality of optical fiber ringings on the same base. By adjusting the first and second optical fiber ringing polarization knobs, the position of the base is controlled, that is, by pressing the optical fiber with pressure, the relative position of the plurality of optical fiber ringings and the relative height with respect to the incident light are adjusted to form linear birefringence. Utilizing the phase difference of the light passing through the fast axis and the slow axis, the optimal incident angle and the optimal optical path are found, and finally the required polarization state of the light is obtained. The delay ring made of optical fiber is small in size and useful for lattice phase control. The all-optical fiber structure has low insertion loss, no reflection, high control speed, and short response time.

Brief Description of the Drawings

[0016]

Figure 1

Explanation of Reference Numerals

[0017] 1. Light source, 2. First wave plate polarization knob, 3. Second wave plate polarization knob, 4. Wave plate axis, 5. Wave plate, 6. Ring electrode, 7. Conductive electrode, 8. Output connector, 9. Optical fiber sleeve, 10. Input connector, 11. First optical fiber ringing polarization knob, 12. Second optical fiber ringing polarization knob, 13. Optical fiber ringing, 14. Base, 15. Image display device, 16. Single-chip computer.

Embodiments for Carrying Out the Invention

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment

[0019] As shown in FIG. 1, a polarization extinction measurement control device for thermal power generation includes a first wave plate polarization knob 2 and a second wave plate polarization knob 3 connected to a single-chip computer 16. Between the first wave plate polarization knob 2 and the second wave plate polarization knob 3, a plurality of wavelength plates 5 with adjustable angles are provided. The wavelength plates 5 are located within the electric field range, the electric field is perpendicular to the light propagation direction, and the single-chip computer 16 is also connected to a first optical fiber ribbon polarization knob 11 and a second optical fiber ribbon polarization knob 12. Between the first optical fiber ribbon polarization knob 11 and the second optical fiber ribbon polarization knob 12, a plurality of optical fiber ribbons 13 are provided. By the single-chip computer 16 controlling the first wave plate polarization knob 2, the second wave plate polarization knob 3, the first optical fiber ribbon polarization knob 11, and the second optical fiber ribbon polarization knob 12 correspondingly, self-tuning of the polarization state of light is realized.

[0020] Specifically, the plurality of wavelength plates 5 are attached to the same wavelength plate axis 4, and the outer shell of the wavelength plate axis 4 is coated with a conductive electrode 7. The conductive electrode 7 forms an electric field perpendicular to the light propagation direction under the action of the ring electrode 6.

[0021] The bare optical fibers at the output ends of the plurality of wavelength plates 5 are connected to an optical fiber sleeve 9 through an output connector 8, and the optical fiber sleeve 9 is connected to the input ends of the plurality of optical fiber ribbons 13 through an input connector 10.

[0022] The plurality of optical fiber ribbons 13 are attached to the same base 14, and both ends of the base 14 are respectively connected to the first optical fiber ribbon polarization knob 11 and the second optical fiber ribbon polarization knob 12.

[0023] An image display device 15 for displaying the polarization state signal of light is connected to the output ends of the plurality of optical fiber splicings 13, and the image display device 15 is connected to a single-chip computer 16.

[0024] Based on the above device, a polarization extinction measurement control method for thermal power generation is realized. The method includes: S1. The original incident light emitted from the light source hits a plurality of wave plates and refracts. The single-chip computer adjusts the first wave plate polarization knob and the second wave plate polarization knob to realize the birefringence of light under the uniaxial condition under the action of the electric field, and the primary refracted light is obtained. S2. The primary refracted light is converted into secondary incident light, and the method includes adjusting the first optical fiber splicing polarization knob and the second optical fiber splicing polarization knob by using the single-chip computer to realize linear birefringence and obtain the polarization state signal of light.

[0025] In step S1, specifically, the single-chip computer is used to adjust the first wave plate polarization knob and the second wave plate polarization knob, change the angle of the wave plate, change the lateral polarization state and the polarization angle of the refracted light, and readjust the polarization angle of the optical fiber under the action of the electric field to complete the birefringence of light under the uniaxial condition.

[0026] In step S2, specifically, the single-chip computer is used to adjust the first optical fiber splicing polarization knob and the second optical fiber splicing polarization knob, press the optical fiber with pressure, adjust the relative position of the plurality of optical fiber splicings and the relative height with respect to the incident light, form linear birefringence, use the phase difference of the light passing through the fast axis and the slow axis to find the optimal incident angle and the optimal optical path, and finally obtain the required polarization state of light.

[0027] In this embodiment, the single-chip computer 16 employs an embedded system ARM controller. The number of wave plates 5 is three, and the number of optical fiber ringings 13 is four. The light source 1 emits the original incident light, which refracts when it hits the wave plate 5. To ensure that the incident light and the emitted light are in the same plane, the central points of the three wave plates 5 are fixed to the wave plate axis 4. The first wave plate polarization knob 2 and the second wave plate polarization knob 3 are adjusted to change the angle of the wave plate and the lateral polarization state. The outer shell of the wave plate axis 4 is coated with a conductive electrode 7. Due to the action of the ring electrode 6, an electric field perpendicular to the light propagation direction is formed. The combined action of the electric field and the wave plate completes the birefringence of light under the uniaxial condition. The bare optical fiber completes the conversion of the primary refracted light to the secondary incident light through the output connector 8, the optical fiber sleeve 9, and the input connector 10. The first optical fiber ringing polarization knob 11 and the second optical fiber ringing polarization knob 12 are adjusted to control the position of the base 14, press the optical fiber by pressure, adjust the relative position between the four optical fiber ringings 13 and the relative height with respect to the incident light to form linear birefringence, utilize the phase difference passing through the fast axis and the slow axis of the light to find the optimal incident angle and the optimal optical path, finally obtain the required polarization state of the light, and transmit this signal to the image display device 15 to complete signal processing and image display. To achieve the best extinction ratio, the single-chip computer 16 controls the wave plate polarization knob and the optical fiber ringing polarization knob using hard wires to realize the self-tuning of the light polarization state adjustment.

[0028] As can be seen from the above, the design by this solution means can apply an electric field force to waveplate-type polarization control and more appropriately realize the simulation of uniaxial light polarization adjustment. By changing the vibration direction with respect to the linear polarization of the fast axis, any required polarization state can be obtained. In order to improve the polarization control performance, a single-chip computer and a waveplate polarization knob are used to realize a large adjustment or fine adjustment of the waveplate rotation angle, and the polarization state adjustment resolution with better performance is better than 0.36°. By applying an electric field force using a ring electrode and a conductive electrode, the optical fiber simulation in the industrial field can be more appropriately completed, and the optical transmission efficiency can be optimized by measuring the optical transmission state.

[0029] In this solution means, the optical fiber ring has a small size, excellent adjustment performance, and low optical loss. Since the delay ring made of optical fiber has a small size, it contributes to the lattice phase control. By pressing the optical fiber under pressure, linear birefringence is formed and the polarization state of the incident light changes. Due to the all-fiber structure, the insertion loss is very low, there is no reflection, the control speed is fast, and the response time is short.

[0030] In this solution means, it has excellent adjustment performance and can simultaneously display the double change curve of the light intensity. An embedded system ARM controller is used in the single-chip computer, and by monitoring the correspondence between the change in the operating voltage and the change curve of the light intensity in the graphic display device in real time, the system performance of the polarization extinction measurement device can be observed. In addition to the use of feedback communication, in the performance monitoring system, in order to realize synchronous drive and monitoring and feedback the change in the light intensity to the computer, it is also necessary to write software corresponding to the ARM controller, and the computer displays the change curve through the written program.

Claims

1. A polarization extinction measurement control device for thermal power generation, comprising a first wave plate polarization knob (2) and a second wave plate polarization knob (3) connected to a single-chip computer (16), and a plurality of angle-adjustable wave plates (5) are provided between the first wave plate polarization knob (2) and the second wave plate polarization knob (3), the wave plates (5) are located within an electric field range, the electric field is perpendicular to the light propagation direction, the single-chip computer (16) is also connected to a first optical fiber ring polarization knob (11) and a second optical fiber ring polarization knob (12), and a plurality of optical fiber rings (13) are provided between the first optical fiber ring polarization knob (11) and the second optical fiber ring polarization knob (12), and the single-chip computer (16) controls the first wave plate polarization knob (2), the second wave plate polarization knob (3), the first optical fiber ring polarization knob (11) and the second optical fiber ring polarization knob (12) correspondingly, so as to realize self-tuning of the polarization state adjustment of light. A polarization extinction measurement control device for thermal power generation, characterized in that.

2. The plurality of wave plates (5) are attached to the same wave plate axis (4), a conductive electrode (7) is coated on the outer shell of the wave plate axis (4), and the conductive electrode (7) forms an electric field perpendicular to the light propagation direction under the action of the ring electrode (6). The polarization extinction measurement control device for thermal power generation according to claim 1, characterized in that.

3. The bare optical fibers at the output ends of the plurality of wave plates (5) are connected to an optical fiber sleeve (9) through an output connector (8), and the optical fiber sleeve (9) is connected to the input ends of a plurality of optical fiber rings (13) through an input connector (10). The polarization extinction measurement control device for thermal power generation according to claim 1, characterized in that.

4. The plurality of optical fiber rings (13) are attached to the same base (14), and both ends of the base (14) are respectively connected to the first optical fiber ring polarization knob (11) and the second optical fiber ring polarization knob (12). The polarization extinction measurement control device for thermal power generation according to claim 1, characterized in that.

5. An image display device (15) for displaying the polarization state signal of light is connected to the output ends of the plurality of optical fiber rings (13). The polarization extinction measurement control device for thermal power generation according to claim 1, characterized in that.

6. The polarimetric extinction measurement control device for thermal power generation according to claim 5, wherein the image display device (15) is connected to a single-chip computer (16).

7. The polarimetric extinction measurement control device for thermal power generation according to any one of claims 1 to 6, wherein the single-chip computer (16) employs an embedded system ARM controller.

Images