A light spot energy distribution modulator and optical communicator

Abstract

The utility model relates to the field of optical communication technology, concretely relates to a kind of optical spot energy distribution modulator and optical communication device.The optical spot energy distribution modulator includes collimating subassembly, polarization modulation subassembly, polarization state rotating subassembly and polariscope in order along optical path, collimating subassembly is used to collimate the light spot size required for output with incident light expansion;The polarization modulation subassembly is used to split the optical signal and modulate the polarization state direction consistency of light signal after splitting;The polarization state rotating subassembly includes magnetic field control component and Faraday sheet in the magnetic field control component, the magnetic field control component passes through the magnetic field intensity of different regions on Faraday sheet control, to make the rotation angle of different regions light spot polarization direction different, the polariscope is used to filter control light spot energy distribution, to reach light spot distribution modulation.The above structure can easily meet the demand of high-speed dynamic modulation scene, realizes the accurate partition control of light spot energy distribution, improves modulation precision.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and in particular to a light spot energy distribution modulator and an optical communication device. Background Technology

[0002] In optical communication, precise modulation of light spot energy distribution is one of the key core technologies. Currently, the commonly used light spot energy distribution modulation scheme in the industry mainly relies on microcrystalline array switches. This scheme adjusts the energy distribution of the light spot by controlling the undulations of the reflective surface on the metal surface. However, the precision machining of the reflective surface and the fabrication process of the microcrystalline array are complex, resulting in high overall equipment manufacturing costs, which is not conducive to large-scale application. At the same time, the undulation adjustment response speed of the mechanical structure is slow, which is usually difficult to meet the needs of high-speed dynamic modulation scenarios. Utility Model Content

[0003] This invention provides a spot energy distribution modulator and an optical communication device to solve the problems of slow response speed and high cost in the prior art.

[0004] This utility model discloses a light spot energy distribution modulator, comprising: a collimation component, a polarization modulation component, a polarization state rotation component, and a polarization analyzer arranged sequentially along the optical path. The collimation component is used to collimate and expand the incident light to output the required light spot size. The polarization modulation component is used to split the optical signal and modulate the polarization state direction of the split optical signal to be consistent. The polarization state rotation component includes a magnetic field control component and a Faraday plate disposed within the magnetic field control component. The magnetic field control component controls the magnetic field strength of different regions on the Faraday plate, thereby making the rotation angle of the polarization direction of the light spot in different regions different. The polarization analyzer is used to filter and control the light spot energy distribution to achieve light spot distribution modulation.

[0005] Optionally, the collimation component includes a first lens and a second lens disposed opposite to each other, the first lens and the second lens forming a collimation optical path system for telephoto lenses, used to achieve changes in different spot sizes.

[0006] Optionally, the polarization modulation component includes a crystal and a half-wave plate disposed on the crystal. After the optical signal is split by the crystal, one optical signal is adjusted by the half-wave plate to match the polarization state of the other optical signal.

[0007] Optionally, the crystal is a uniaxial crystal.

[0008] Optionally, the magnetic field modulation is achieved by using an external electric field to generate magnetism, thereby modulating the magnetic field on the Faraday plate.

[0009] Optionally, the magnetic field control component includes a plurality of spaced conductors disposed around the Faraday plate, the conductors being used to generate a magnetic field when energized.

[0010] Optionally, the Faraday plate, in conjunction with a magnetic field, controls the polarization state rotation angle in different regions, with the following correspondence:

[0011]

[0012]

[0013] In the formula The corresponding phase delay, For rotation angle, The collimated spot polarization state, For Faraday's constant, Widl's constant is given. The magnetic field strength, This represents the thickness corresponding to the Faraday film.

[0014] Optionally, the polarization detector is a polarizing filter.

[0015] Optionally, the first lens and the second lens are collimating lenses.

[0016] This utility model also discloses an optical communication device, including the above-described spot energy distribution modulator.

[0017] The beneficial effects of the light spot energy distribution modulator and optical communicator provided in this embodiment of the invention are as follows: The core function of the collimation component is to collimate and expand the incident light, ensuring that the output spot size meets the requirements. The polarization modulation component is responsible for splitting the input light signal and modulating the polarization states of the multiple beams into a consistent direction, laying the foundation for subsequent unified control. The polarization state rotation component is the core control unit, consisting of a magnetic field control component and a built-in Faraday plate. The magnetic field control component precisely controls the magnetic field strength in different regions of the Faraday plate, using the Faraday effect to generate differentiated rotation angles in the polarization direction of different regions of the spot. The polarization analyzer, through filtering, achieves precise modulation of the spot energy distribution based on the differences in polarization direction in different regions. This embodiment eliminates complex processes such as microcrystalline array fabrication, significantly reducing manufacturing costs and facilitating large-scale promotion. Simultaneously, the magnetic field control response speed is fast, easily meeting the needs of high-speed dynamic modulation scenarios, achieving precise regional control of the spot energy distribution, and improving modulation accuracy. Attached Figure Description

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the light spot energy distribution modulator provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the polarization state rotation component provided in an embodiment of this utility model.

[0019] The labels for the attached figures are as follows: 10. Collimation component; 110. First lens; 120. Second lens; 20. Polarization modulation component; 210. Crystal; 220. Half-wave plate; 30. Polarization state rotation component; 311. Conductor; 320. Faraday plate; 40. Analyzer; 50. Optical signal. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] This utility model provides a light spot energy distribution modulator, such as Figure 1 As shown, the device includes: a collimation component 10, a polarization modulation component 20, a polarization state rotation component 30, and an analyzer 40 arranged sequentially along the optical path. The collimation component 10 is used to collimate and expand the incident light to output the required spot size. The polarization modulation component 20 is used to split the optical signal and modulate the polarization state of the split optical signal to be consistent. The polarization state rotation component 30 includes a magnetic field control component and a Faraday plate 320 disposed in the magnetic field control component. The magnetic field control component controls the magnetic field strength of different regions on the Faraday plate 320, thereby making the rotation angle of the polarization direction of the spot in different regions different. The analyzer 40 is used to filter and control the energy distribution of the spot to achieve spot distribution modulation.

[0022] The collimation component 10's core function is to collimate and expand the incident light, ensuring the output spot size meets the requirements. The polarization modulation component 20 is responsible for splitting the input light signal and modulating the polarization states of the multiple beams into a consistent direction, laying the foundation for subsequent unified control. The polarization rotation component 30 is the core control unit, consisting of a magnetic field control component and a built-in Faraday plate 320. The magnetic field control component precisely controls the magnetic field strength in different regions of the Faraday plate 320, utilizing the Faraday effect to generate differentiated rotation angles in the polarization directions of different regions of the spot. The analyzer 40, through filtering, achieves precise modulation of the spot energy distribution based on the differences in polarization directions in different regions. This embodiment eliminates complex processes such as microcrystalline array fabrication, significantly reducing manufacturing costs and facilitating large-scale promotion. Simultaneously, the magnetic field control response speed is fast, easily meeting the needs of high-speed dynamic modulation scenarios, achieving precise zonal control of the spot energy distribution, and improving modulation accuracy.

[0023] As an optional solution in this embodiment, such as Figure 1 As shown, the collimation assembly 10 includes a first lens 110 and a second lens 120 arranged opposite to each other. The first lens 110 and the second lens 120 construct a collimation optical path system for telephoto lenses, which is used to achieve changes in the size of different light spots.

[0024] In this embodiment, the design of a dual-lens telephoto system allows the modulator to be flexibly adjusted according to the spot size requirements of different application scenarios, thereby improving the versatility of the device.

[0025] As an optional solution in this embodiment, such as Figure 1 As shown, the polarization modulation component 20 includes a crystal 210 and a half-wave plate 220 disposed on the crystal 210. After the optical signal is split by the crystal 210, one of the optical signals is adjusted by the half-wave plate 220 to match the polarization state of the other optical signal.

[0026] In this embodiment, the polarization modulation component 20, through the crystal 210 and the half-wave plate 220, achieves the stability and consistency of the optical signal polarization state modulation, ensuring the accuracy of subsequent polarization state rotation control and providing a guarantee for the overall modulation accuracy.

[0027] As an optional solution in this embodiment, crystal 210 is a uniaxial crystal 210.

[0028] Among them, the uniaxial crystal 210 has stable birefringence characteristics, strong controllability of beam splitting effect, and can accurately realize beam splitting of optical signals.

[0029] As an optional solution in this embodiment, the magnetic field modulation is achieved by using an external electric field to generate magnetism, thereby modulating the magnetic field on the Faraday plate 320.

[0030] Among them, the external electric field magnetization method can achieve fine-tuning of the magnetic field strength by precisely controlling the electric field parameters, thereby enabling precise control of the polarization rotation angle of different regions of the Faraday film 320 and improving the modulation accuracy of the light spot energy distribution. This method has high control sensitivity and faster response speed, further meeting the requirements of high-speed dynamic modulation. At the same time, the electric field control has strong stability, which can reduce the interference of environmental factors on the magnetic field and improve the reliability of equipment operation.

[0031] As an optional solution in this embodiment, such as Figure 2 As shown, the magnetic field control component includes a plurality of spaced conductors 311 disposed around the Faraday plate 320, which are used to generate a magnetic field when energized.

[0032] The structure of conductor 311 can form a changing magnetic field region within the Faraday plate 320, allowing for the adjustment of the polarization direction rotation angle. This structure is simple in design, low in manufacturing cost, and allows for convenient control of the magnetic field strength by adjusting the current, resulting in a fast response speed. This further enhances the advantages of high-speed dynamic modulation and simplifies the equipment debugging process.

[0033] As an optional solution in this embodiment, the Faraday plate 320, in conjunction with a magnetic field, controls the polarization state rotation angle in different regions, with the following correspondence:

[0034]

[0035]

[0036] In the formula The corresponding phase delay, For rotation angle, The collimated spot polarization state, For Faraday's constant, Widl's constant is given. The magnetic field strength, This represents the thickness corresponding to the Faraday film.

[0037] Through the aforementioned quantitative relationship, the required magnetic field strength and other parameters can be calculated in reverse according to the energy distribution requirements of the target light spot, thereby achieving precise quantitative modulation of the light spot energy distribution and significantly improving modulation accuracy and controllability.

[0038] As an optional solution in this embodiment, the polarization detector 40 uses a polarization filter.

[0039] Among them, polarization filters offer stable filtration and controllable transmittance, accurately filtering polarized light signals that do not meet requirements and achieving efficient modulation of the light spot energy distribution. Furthermore, polarization filters are small in size and lightweight, simplifying the overall structure of the modulator, reducing equipment size and manufacturing costs, while their stable performance enhances the long-term reliability of the equipment.

[0040] As an optional solution in this embodiment, the first lens 110 and the second lens 120 are collimating lenses.

[0041] Among them, the collimating lens has excellent collimation and beam expansion performance, which can ensure that the incident light forms a light spot with high parallelism and precise size after processing, providing a high-quality optical signal basis for subsequent polarization modulation and rotation control.

[0042] This application also discloses an optical communication device, including the spot energy distribution modulator described in the foregoing embodiments. This optical communication device has the same structure and beneficial effects as the spot energy distribution modulator described in the foregoing embodiments. The structure and beneficial effects of the spot energy distribution modulator have been described in detail in the foregoing embodiments and will not be repeated here.

[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A spot energy distribution modulator, characterized in that, include: The optical path includes a collimation component, a polarization modulation component, a polarization state rotation component, and an analyzer arranged sequentially. The collimation component is used to collimate and expand the incident light to output the required spot size. The polarization modulation component is used to split the optical signal and modulate the polarization state of the split optical signal to be consistent. The polarization state rotation component includes a magnetic field control component and a Faraday plate disposed within the magnetic field control component. The magnetic field control component controls the magnetic field strength of different regions on the Faraday plate, thereby making the rotation angle of the polarization direction of the spot different in different regions. The analyzer is used to filter and control the energy distribution of the spot to achieve spot distribution modulation.

2. The beam energy distribution modulator according to claim 1, characterized in that, The collimation component includes a first lens and a second lens arranged opposite to each other. The first lens and the second lens construct a collimation optical path system for telephoto lenses, which is used to achieve changes in the size of different light spots.

3. The beam energy distribution modulator according to claim 2, characterized in that, The polarization modulation component includes a crystal and a half-wave plate disposed on the crystal. After the optical signal is split by the crystal, one optical signal is adjusted by the half-wave plate to match the polarization state of the other optical signal.

4. The beam energy distribution modulator according to claim 3, characterized in that, The crystal is a uniaxial crystal.

5. The beam energy distribution modulator according to claim 4, characterized in that, The magnetic field modulation is achieved by using an external electric field to generate magnetism, thereby modulating the magnetic field on the Faraday plate.

6. The beam energy distribution modulator according to claim 5, characterized in that, The magnetic field control component includes a plurality of conductors spaced apart around the Faraday plate, which are used to generate a magnetic field when energized.

7. The beam energy distribution modulator according to claim 6, characterized in that, The Faraday plate, in conjunction with a magnetic field, controls the polarization state rotation angle in different regions, with the following correspondence: In the formula The corresponding phase delay, For rotation angle, The collimated spot polarization state, For Faraday's constant, Widl's constant is given. The magnetic field strength, This represents the thickness corresponding to the Faraday film.

8. The beam energy distribution modulator according to claim 7, characterized in that, The polarization detector uses a polarizing filter.

9. The beam energy distribution modulator according to claim 2, characterized in that, The first lens and the second lens are collimating lenses.

10. An optical communication device, characterized in that, Includes the light spot energy distribution modulator according to any one of claims 1 to 9.

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