Optical fiber integrated photoelectric detector auxiliary device with polarization function

Abstract

The application discloses a kind of optical fiber integrated photoelectric detector auxiliary equipment with polarizing function, it is related to photoelectric detector auxiliary equipment technical field, including photoelectric detector main body, polarizing component and splicing component, the linearly polarized light is formed by polaroid one in the application, polaroid two rotates 90 degrees, the transmission vibration direction of polaroid one and polaroid two is consistent at this time, the linearly polarized light that comes out from polaroid one can pass through polaroid two completely without obstruction, which means that the intensity loss of light is minimum, guarantee the intensity of light, wave sheet rotates 45 degrees, linearly polarized light and wave sheet fast axis form 45 ° angle of incidence at this time, it will be converted into circularly polarized light, so that the polarization state of conversion light meets the demand, the polarization state of light is adjusted by flexible adjustment wave sheet angle, meet the demand of the application of accurate polarization control, the polarization state of signal light can be correctly aligned by the combination of the two, filter out unnecessary polarization component, to improve signal-to-noise ratio and measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for photodetectors, and more specifically, to an auxiliary equipment for an integrated fiber optic photodetector with a polarization function. Background Technology

[0002] Fiber-optic integrated photodetectors are devices that directly integrate photodetectors into fiber optic networks. They can directly convert optical signals into electrical signals inside the fiber without extracting the optical signals from the fiber and then converting them. The main advantages of this design are reduced signal loss, improved overall system performance and reliability, simplified system architecture, and reduced costs.

[0003] Existing fiber-integrated photodetectors typically convert optical signals received by diodes into current signals, amplify the signals to a level suitable for further processing, and use fiber optic interfaces to guide the optical signals from the fiber into the detector and output the electrical signals from the detector to subsequent circuits for data decoding and processing. An important aspect of integrated photodetectors is their compatibility and integration, which means they can be easily integrated into existing fiber optic networks.

[0004] In practical applications, existing technologies may require matching the detector with a light source or signal of a specific polarization state to achieve optimal signal reception. If the polarization of the signal light and the detector is mismatched, it may lead to a decrease in signal strength and affect signal quality. Therefore, to address the above technical issues, it is necessary to provide an auxiliary device for an integrated fiber optic photodetector with polarization adjustment function. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary device for an integrated fiber optic photodetector with a polarization function to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] An auxiliary device for an integrated fiber optic photodetector with polarization function includes a photodetector body, a polarization assembly, and a splicing assembly. The photodetector body has a fiber optic interface on one side and includes a polarization tube movably connected to one side of the photodetector body. A polarizer is embedded in the inner cavity of the polarization tube at the end furthest from the photodetector body. Two pairs of symmetrically arranged spherical grooves are formed in the inner cavity of the polarization tube. A waveplate is movably connected to the middle of the polarization tube through a slit. A second polarizer is movably connected to the end of the polarization tube closest to the photodetector body through a slit. A gear is fixedly connected to the outer surface of the waveplate, and a gear is fixedly connected to the outer surface of the second polarizer. A rack is meshed with the first gear, and a rack is meshed with the second gear. The device also includes two limiting blocks symmetrically fixedly connected to the outer surface of the polarization tube. A limiting rod is inserted into the inner cavity of each limiting block, and a fixing plate is slidably connected to the outer surface of the limiting rod. A spring is sleeved on the outer surface of the limiting rod.

[0008] As a further improvement of the present invention, the polarizing tube is sleeved on the outer surface of the optical fiber interface, and two fixing frames are fixedly connected to the outer surface of the polarizing tube. Multiple spherical connecting rods are fixedly connected to both sides of the second polarizer and the waveplate. The spherical connecting rods rotate in the spherical groove. The spherical connecting rods and the spherical groove serve as limiting components to ensure that the second polarizer and the waveplate rotate within a limited range.

[0009] As a further improvement of the present invention, a screw is rotatably connected to the inner cavity of the fixed frame, and a movable block is threadedly connected to the outer surface of the screw. One side of the movable block abuts against the inner sidewall of the fixed frame. The rotation of the screw drives the movable block to move, and the movable block moves linearly within the inner cavity of the fixed frame.

[0010] As a further improvement of the present invention, the lower surface of the moving block abuts against the bottom of the inner cavity of the fixed frame, and a motor is fixedly connected to one side of the fixed frame. The output shaft of the motor is fixedly connected to the screw through a coupling, and the motor serves as a drive source to drive the screw to rotate.

[0011] As a further improvement of the present invention, the first polarizer and the second polarizer are made of optical materials, the waveplate is made of birefringent transparent material, the first polarizer and the second polarizer are used to selectively filter the polarization direction of light, and the waveplate is used to change the phase difference of light, thereby changing its polarization state.

[0012] As a further improvement of the present invention, the linear movement distance of the rack two can drive the gear two to rotate 90 degrees, and the rotation of the polarizer two by 90 degrees is consistent with the transmission direction of the polarizer one, so the rack two drives the polarizer two to rotate precisely.

[0013] As a further improvement of the present invention, the linear movement distance of the rack can drive the gear to rotate 45 degrees. When the waveplate rotates 45 degrees, the fast axis of the waveplate forms a 45° angle with the transmission direction of the polarizer. The waveplate rotates precisely through the rack and gear, and the angle is changed by the rotation.

[0014] As a further improvement of the present invention, the outer surfaces of polarizer one, polarizer two and waveplate are all provided with scale values, and the angle of adjustment is precisely controlled by the scale values.

[0015] As a further improvement of the present invention, a movable plate is fixedly connected to the upper end of the limiting rod, and one side of the fixed plate is fixedly connected to one side of the photodetector body. The movable plate drives the limiting rod to move.

[0016] As a further improvement of the present invention, the lower end of the spring is fixedly connected to the fixed plate, and the upper end of the spring is fixedly connected to the movable plate. The spring can drive the movable plate, which is moved manually, to automatically reset.

[0017] Compared with the prior art, the advantages of this invention are:

[0018] (1) This solution uses polarizer one to block all light waves except those with the same transmission direction as it, forming linearly polarized light. The motor drives the moving block and rack two to move. When rack two moves, it drives gear two and polarizer two, which are meshed with it, to rotate 90 degrees. At this time, the transmission directions of polarizer one and polarizer two are the same. The linearly polarized light from polarizer one can pass through polarizer two without any obstruction. This means that the light intensity loss is minimal, ensuring the light intensity. Conversely, the motor is started to drive polarizer one to rotate 90 degrees in the opposite direction. At this time, the transmission directions of polarizer one and polarizer two are orthogonal, and almost no light passes through. The operator can also flexibly adjust the rotation angle of polarizer two according to the actual needs to change the intensity of the transmitted light and meet different working requirements.

[0019] (2) In this scheme, the motor drives the moving block and rack to move, which in turn drives the gear and waveplate connected to it to rotate 45 degrees. At this time, the linearly polarized light is incident at a 45° angle with the fast axis of the waveplate, and it will be converted into circularly polarized light. This converts the polarization state of the light to meet different requirements. The polarization state of the light can be adjusted by flexibly adjusting the angle of the waveplate to meet the application requirements of precise polarization control. In some cases, the waveplate can be used to balance the propagation characteristics of light with different polarization states, reduce polarization mode dispersion and other polarization-related effects. The combination of the two can help ensure that the polarization state of the signal light is correctly aligned and filter out unwanted polarization components, thereby improving the signal-to-noise ratio and measurement accuracy, so as to achieve efficient multiplexing and demultiplexing.

[0020] (3) This solution involves connecting the polarization tube to the fiber optic interface and then using the spring force to drive the limiting rod into the inner cavity of the limiting block to limit the block. At this time, the polarization tube is installed on the photodetector body. Operators can choose to install it according to actual needs to achieve the effect of assisting in adjusting the polarization state of light. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention in half section;

[0023] Figure 3 This is a partial structural breakdown diagram of the present invention;

[0024] Figure 4 This is a partial structural breakdown diagram of the present invention.

[0025] Explanation of the labels in the diagram:

[0026] 1. Photodetector body; 101. Fiber optic interface; 2. Polarizing assembly; 201. Polarizing tube; 202. Spherical slide; 203. Spherical slide bar; 204. Fixing frame; 205. Polarizer I; 206. Wave plate; 207. Polarizer II; 208. Gear I; 209. Gear II; 210. Rack I; 211. Rack II; 212. Screw; 213. Moving block; 214. Motor; 3. Splicing assembly; 301. Limiting block; 302. Limiting rod; 303. Fixing plate; 304. Moving plate; 305. Spring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Example 1:

[0029] Please see Figure 1-4An auxiliary device for an integrated fiber optic photodetector with polarization function includes a photodetector body 1, a polarization assembly 2, and a splicing assembly 3. A fiber optic interface 101 is provided on one side of the photodetector body 1. A polarization tube 201 is movably connected to one side of the photodetector body 1. A polarizer 205 is embedded in the inner cavity of the end of the polarization tube 201 away from the photodetector body 1. Two pairs of symmetrically arranged spherical grooves 202 are formed in the inner cavity of the polarization tube 201. A waveplate 206 is movably connected to the middle of the polarization tube 201 through a slit. A second polarizer 207 is movably connected to the end of the polarization tube 201 near the photodetector body 1 through a slit. A gear 208 is fixedly connected to the outer surface of the waveplate 206. A second gear 209 is fixedly connected to the outer surface of the second polarizer 207. A gear 208 meshes with a rack 210, and a gear 209 meshes with a rack 211.

[0030] Specifically, the polarizing tube 201 is fitted onto the outer surface of the fiber optic interface 101. Two fixing frames 204 are fixedly connected to the outer surface of the polarizing tube 201. Multiple spherical connecting rods 203 are fixedly connected to both sides of the polarizer 207 and the waveplate 206. The spherical connecting rods 203 rotate within the spherical groove 202.

[0031] Furthermore, the polarizing tube 201 is used to deliver the light source. The polarizer 207 and the waveplate 206 are supported and positioned by the spherical slide 202 and the spherical slide rod 203 to ensure that they rotate within the polarizing tube 201. The fixing frame 204 is used to fix the polarizing tube (201) to ensure that their positions remain unchanged during use.

[0032] A screw 212 is rotatably connected to the inner cavity of the fixed frame 204. A movable block 213 is threadedly connected to the outer surface of the screw 212. One side of the movable block 213 abuts against the inner wall of the fixed frame 204, and the lower surface of the movable block 213 abuts against the bottom of the inner cavity of the fixed frame 204. A motor 214 is fixedly connected to one side of the fixed frame 204. The output shaft of the motor 214 is fixedly connected to the screw 212 through a coupling. Polarizer 1 205 and polarizer 2 207 are made of optical materials, and waveplate 206 is made of birefringent transparent material.

[0033] Motor 214 drives screw 212 to rotate as the main drive source. Moving block 213 moves linearly within fixed frame 204. Polarizer 1 205 and polarizer 207 are made of optical materials that can selectively absorb polarized light in a certain direction when light passes through, thus allowing light with a specific polarization direction to pass through. Examples include polyvinyl alcohol, cellulose triacetate, and polymer materials. Operators can select these materials themselves. Waveplate 206 is supported by birefringent transparent material, which allows it to produce different phase delays for different polarization states of the transmitted light. Examples include quartz, calcite, and mica. Operators can select these materials themselves.

[0034] The linear movement of rack 211 can drive gear 209 to rotate 90 degrees. When polarizer 207 rotates 90 degrees, it is aligned with the transmission direction of polarizer 1 205. The linear movement of rack 210 can drive gear 1 208 to rotate 45 degrees. When waveplate 206 rotates 45 degrees, the fast axis of waveplate 206 forms a 45° angle with the transmission direction of polarizer 1 205. The outer surfaces of polarizer 1 205, polarizer 207 and waveplate 206 are all provided with scale values.

[0035] The movement distance of rack 210 can drive gear 208 and polarizer 205 to rotate 90 degrees. When the transmission directions of the two polarizers are consistent, the linearly polarized light from the first polarizer can pass through the second polarizer without any obstruction. This means that the light intensity loss is minimal and the light intensity can remain unchanged. The parallel polarizer directions help maintain the stability and consistency of the output light, which is crucial for precision measurement or processing. Conversely, when the transmission directions of the two polarizers are orthogonal, no light can pass through. The polarizers can be rotated at any angle to obtain the required transmitted light intensity. A waveplate 206 is added between the two polarizers. Waveplate 206λ is divided into λ / 2 waveplate (half-wave plate) and λ / 4 waveplate (quarter-wave plate), which have different effects. The λ / 2 waveplate (half-wave plate) can be used to rotate the polarization direction of the incident linearly polarized light. If the linearly polarized light is incident at an angle θ with the optical axis of the waveplate, the polarization direction of the outgoing light will be rotated by an angle 2θ relative to the incident light. If the transmission directions of two polarizers are orthogonal, and a half-wave plate with a suitable orientation is added between them, some light can pass through, thus breaking the original complete blockage of light intensity. A λ / 4 wave plate (quarter-wave plate) can convert linearly polarized light into circularly polarized light or elliptically polarized light, and vice versa. When linearly polarized light is incident on a λ / 4 wave plate at a 45° angle, it will be converted into circularly polarized light. When circularly polarized light passes through a λ / 4 wave plate, it will be converted back into linearly polarized light, but the polarization direction will be rotated by 90°, thus achieving the desired polarization state conversion. Operators can make their own selections according to actual adjustment needs. The outer surfaces of polarizer 1 205, polarizer 2 207, and wave plate 206 are all set with scale values, allowing operators to accurately grasp the changes in scale values.

[0036] Example 2:

[0037] Please see Figure 1-2 It includes two limiting blocks 301 that are symmetrically fixedly connected to the outer surface of the deflection tube 201. A limiting rod 302 is inserted into the inner cavity of the limiting block 301. A fixing plate 303 is slidably connected to the outer surface of the limiting rod 302. A spring 305 is sleeved on the outer surface of the limiting rod 302.

[0038] Specifically, a movable plate 304 is fixedly connected to the upper end of the limiting rod 302, one side of the fixed plate 303 is fixedly connected to one side of the photodetector body 1, the lower end of the spring 305 is fixedly connected to the fixed plate 303, and the upper end of the spring 305 is fixedly connected to the movable plate 304.

[0039] Furthermore, the limit block 301 is inserted and limited by the limit rod 302 to realize the installation and disassembly of the deflection tube 201. The spring 305 helps the limit rod 302 to automatically reset. The moving plate 304, as a manual moving part, can drive the limit rod 302 to move.

[0040] Working principle: During device use, the operator attaches the polarizer tube 201 to the fiber optic interface 101. Then, the spring 305's own elasticity drives the limiting rod 302 into the inner cavity of the limiting block 301, thus limiting the limiting block 301. At this time, the polarizer tube 201 is installed on the photodetector body 1. The operator can install it according to actual usage needs, thereby achieving the effect of assisting in adjusting the polarization state of light. In use, when light enters the polarizer tube 201, it first passes through the polarizer located at one end of the polarizer tube 201. Polarizer 205 blocks all light waves except those with the same transmission direction. The transmitted light then becomes linearly polarized. Motor 214 then moves moving block 213 and rack 211. As rack 211 moves, it drives gear 209 and polarizer 207, which are meshed with it, to rotate 90 degrees. At this point, the transmission directions of polarizer 205 and polarizer 207 are aligned, allowing the linearly polarized light from polarizer 205 to pass through polarizer 207 completely unobstructed. This means minimal light intensity loss, ensuring light intensity. Conversely, starting motor 214 drives polarizer 1 205 to rotate 90 degrees in the opposite direction. At this time, the transmission directions of polarizer 1 205 and polarizer 2 207 are orthogonal, so almost no light passes through. The operator can also flexibly adjust the rotation angle of polarizer 2 207 according to actual needs to change the intensity of transmitted light. A waveplate 206 is set between polarizer 1 205 and polarizer 2 207. Starting motor 214 drives moving block 213 and rack 1 210 to move. The gear 208 and waveplate 206, which are meshed with it, rotate 45 degrees. At this time, the linearly polarized light is incident at a 45° angle with the fast axis of the waveplate 206, and it will be converted into circularly polarized light. The polarization state of the converted light meets different requirements. Conversely, it will be converted back into linearly polarized light. The polarization state of the light can be adjusted by flexibly adjusting the angle of the waveplate 206. The combination of the two can help ensure that the polarization state of the signal light is correctly aligned and filter out unwanted polarization components, thereby improving the signal-to-noise ratio and measurement accuracy, so as to achieve efficient multiplexing and demultiplexing.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fiber-integrated photodetector auxiliary device having a polarizing function, characterized by: Include: Photoelectric detector body (1), one side of the photoelectric detector body (1) is provided with a fiber interface (101); The polarizing component (2) comprises a polarizing tube (201) movably connected to one side of the photoelectric detector body (1), a polarizer (205) is embedded in the inner cavity of the end of the polarizing tube (201) away from the photoelectric detector body (1), two pairs of symmetrical spherical sliding grooves (202) are formed in the inner cavity of the polarizing tube (201), a wave plate (206) is movably connected in the gap of the middle of the polarizing tube (201), a polarizer (207) is movably connected in the gap of the end of the polarizing tube (201) close to the photoelectric detector body (1), a gear (208) is fixedly connected to the outer surface of the wave plate (206), a gear (209) is fixedly connected to the outer surface of the polarizer (207), a rack (210) is engaged with the gear (208), and a rack (211) is engaged with the gear (209). The splicing assembly (3) comprises two limiting blocks (301) symmetrically fixedly connected to the outer surface of the polarizing tube (201), a limiting rod (302) is inserted into the inner cavity of the limiting block (301), a fixed plate (303) is slidably connected to the outer surface of the limiting rod (302), and a spring (305) is sleeved on the outer surface of the limiting rod (302).

2. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The polarizing tube (201) is sleeved on the outer surface of the fiber interface (101), two fixed frames (204) are fixedly connected to the outer surface of the polarizing tube (201), a plurality of spherical connecting rods (203) are fixedly connected to the two sides of the polarizer (207) and the wave plate (206), and the spherical connecting rods (203) rotate in the spherical sliding grooves (202).

3. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 2, wherein: The inner cavity of the fixed frame (204) is rotatably connected with a screw rod (212), the outer surface of the screw rod (212) is threadedly connected with a moving block (213), and one side of the moving block (213) abuts against the inner side wall of the fixed frame (204).

4. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 3, characterized in that: The lower surface of the moving block (213) abuts against the bottom of the inner cavity of the fixed frame (204), one side of the fixed frame (204) is fixedly connected with a motor (214), and the output shaft end of the motor (214) is fixedly connected with the screw rod (212) through a shaft coupling.

5. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The polarizer (205) and the polarizer (207) are made of optical material, and the wave plate (206) is made of birefringent transparent material.

6. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The linear movement distance of the rack (211) can drive the gear (209) to rotate by 90 degrees, and the rotation of the polarizer (207) by 90 degrees is consistent with the transmission direction of the polarizer (205).

7. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The linear movement distance of the rack (210) can drive the gear (208) to rotate by 45 degrees, and the rotation of the wave plate (206) by 45 degrees makes the fast axis of the wave plate (206) and the transmission direction of the polarizer (205) form an angle of 45 degrees.

8. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The outer surfaces of the polarizer (205), the polarizer (207) and the wave plate (206) are provided with scale values.

9. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The upper end of the limiting rod (302) is fixedly connected with a moving plate (304), and one side of the fixed plate (303) is fixedly connected with one side of the photoelectric detector main body (1).

10. The fiber-integrated photodetector auxiliary device with a polarizing function according to claim 1, wherein: The lower end of the spring (305) is fixedly connected with the fixed plate (303), and the upper end of the spring (305) is fixedly connected with the moving plate (304).

Images