Optical module for realizing single-path output through birefringence principle
Through the birefringence principle and the combined wave component, two optical signals with polarization states are synthesized into one way, which solves the problem that the 800G optical communication solution in the existing technology requires two FA components output, realizes a single output, and simplifies the optical module Structure and improve output efficiency and stability.
Patent Information
- Application Number
- CN202420012702.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-03
AI Technical Summary
In the prior art, the 800G optical communication solution cannot be output through a single FA component, and two FA components are required to output 8 COC optical signals.
Using the birefringence principle, two optical signals with polarization states perpendicular to each other are combined into one through multiple laser components, birefringence crystals and combined wave components, and output through a single FA component, achieving the merger of multiple signals and single output.
The multiple signals are successfully output through a single FA component, which simplifies the optical module structure, improves output efficiency and stability, and avoids the mutual influence between multiple signals.
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Figure CN222191419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical communication, in particular to an optical module that realizes single-channel output through the principle of double refraction. Background Art
[0002] At present, most of the optical devices and optical modules used in the field of optical communications, as far as 800G is concerned, use 8-way 100G chip on chip (COC). Currently, there are generally 4 different wavelengths of light (1271 / 1291 / 1311 / 1331). Four-way light is output as a group, a total of two groups, which requires two-way light output; the four-way light combination solution is generally achieved through arrayed waveguide grating (AWG) components to achieve light focusing, and 8-way light is combined into two-way output, which requires two-way FA components to achieve two-way light output. In the existing technology, the solution to achieve 800G can only be output through two-way FA components.
[0003] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in the field of this technology. Utility Model Content
[0004] The technical problem to be solved by the utility model is: how to realize output of 8-channel COC through a single-channel FA component.
[0005] The utility model adopts the following technical solutions:
[0006] In the first aspect, an optical module for realizing single-channel output by means of the birefringence principle is proposed, comprising: a plurality of laser components, a plurality of birefringent crystals, a wave combining component and an FA component; wherein each laser component is used to emit an optical signal of a different wavelength; and a birefringent crystal is arranged between each of the laser components and the wave combining component;
[0007] The birefringent crystal is used to synthesize two optical signals with polarization states perpendicular to each other into one;
[0008] The wave combining component is used to combine the optical signals from the plurality of birefringent crystals into one path so as to output through a single FA component.
[0009] Preferably, the optical module further comprises: a plurality of dimming components; the dimming components are arranged between the laser component and the birefringent crystal.
[0010] Preferably, the laser assembly comprises a first laser and a second laser, wherein the first laser and the second laser are used to emit optical signals of the same wavelength;
[0011] The dimming component includes a prism, and the prism is arranged between the first laser and the birefringent crystal;
[0012] The prism is used to correct the displacement of the optical signal.
[0013] Preferably, the dimming component further comprises a polarizer, wherein the polarizer is disposed between the prism and the birefringent crystal, and the polarizer is used to adjust the polarization state of the optical signal.
[0014] Preferably, the wave combining component is a Z-block component.
[0015] Secondly, another optical module for realizing single-channel output by using the birefringence principle is proposed, comprising a plurality of laser components, a wave combining component, a birefringent crystal and a FA component; wherein each laser component is used to emit an optical signal of a different wavelength;
[0016] The wave combining component is used to combine the optical signals emitted by the multiple laser components into two paths;
[0017] The birefringent crystal is used to combine two optical signals whose polarization states are perpendicular to each other into one optical signal, so as to output the signal through a single FA component.
[0018] Preferably, the wave combining component is an AWG component.
[0019] Preferably, the optical module further comprises: a dimming component; the dimming component is arranged between the wave combining component and the birefringent crystal.
[0020] Preferably, the dimming component comprises: a prism and a polarizer, wherein the prism is arranged between the wave combining component and the birefringent crystal, and the prism is used to correct the displacement of the optical signal;
[0021] The polarizer is arranged between the prism and the birefringent crystal, and is used to adjust the polarization state of the optical signal.
[0022] Preferably, the birefringent crystal is a YVO4 crystal.
[0023] Compared with the prior art, the beneficial effects of the utility model are:
[0024] The utility model combines multiple signals into one path through a birefringent crystal and a wave combining component, so as to output through a single FA component. On the one hand, the optical module includes multiple laser components, multiple birefringent crystals, a wave combining component and a FA component; a birefringent crystal is arranged between each laser component and the wave combining component; two optical signals with mutually perpendicular polarization states are first combined into one path through the birefringent crystal, and then the optical signals from the multiple birefringent crystals are combined into one path through the wave combining component, so as to output through a single FA component. On the other hand, the optical module includes multiple laser components, a wave combining component, a birefringent crystal and a FA component; the optical signals emitted by the multiple laser components are first combined into two paths through the wave combining component; and the two optical signals with mutually perpendicular polarization states are combined into one path through the birefringent crystal, so as to output through a single FA component. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 This is a schematic diagram of the structure of an optical module that realizes single-channel output through the principle of birefringence provided by an embodiment of the utility model;
[0027] Figure 2 This is another structural schematic diagram of an optical module that realizes single-channel output through the principle of birefringence provided by an embodiment of the utility model;
[0028] Figure 3 This is a structural schematic diagram of a dimming component of an optical module that realizes single-channel output through the principle of birefringence provided by an embodiment of the utility model;
[0029] Figure 4 This is a schematic diagram of the structure of another optical module that realizes single-channel output through the principle of birefringence provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0031] The terms "first", "second", etc. in this utility model are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.
[0032] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0033] In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0034] Embodiment 1:
[0035] In order to realize the single-channel FA component output of the 8-channel COC, this embodiment provides an optical module that realizes the single-channel output by using the birefringence principle, such as Figure 1 As shown, multiple laser components, multiple birefringent crystals, a combining component and an FA component; wherein each laser component is used to emit optical signals of different wavelengths; a birefringent crystal is arranged between each laser component and the combining component; the birefringent crystal is used to combine two optical signals with mutually perpendicular polarization states into one; and the combining component is used to combine the optical signals from the multiple birefringent crystals into one, so as to output through a single FA component.
[0036] like Figure 2 As shown, the laser assembly includes a first laser and a second laser, wherein the first laser and the second laser are used to emit optical signals of the same wavelength; the first laser is used to emit a first optical signal, and the second laser is used to emit a second optical signal; in a preferred embodiment, referring to Figure 2 , the optical module further includes: a plurality of dimming components; the dimming components are arranged between the laser component and the birefringent crystal. The dimming components are used to adjust the first optical signal to match the optical path of the birefringent crystal; the birefringent crystal is used to combine the first optical signal adjusted by the dimming components and the second optical signal to obtain a third optical signal; the combining component is used to combine the third optical signals obtained from each laser component into one path to achieve a single-path output of optical signals of different wavelengths. Among them, the FA component includes a lens and an optical fiber, which will not be described in detail in this embodiment.
[0037] In a preferred embodiment, the first laser and the second laser may be 100G LD chips; the wave combining component proposed in this embodiment may be a Z-block component, and the birefringent crystal may be a YVO4 crystal.
[0038] Each laser assembly includes a first laser and a second laser, and each laser assembly is used to emit optical signals of different wavelengths. The first laser and the second laser both use 100G LD chips, which are respectively used to emit optical signals of the same wavelength. Therefore, each laser assembly can simultaneously generate two optical signals of the same wavelength, namely the first optical signal and the second optical signal. The dimming assembly is used to adjust the first optical signal to ensure that its optical path matches the requirements of the birefringent crystal. It involves adjusting parameters such as the intensity, direction or polarization state of light so that they can be correctly merged in the birefringent crystal. The birefringent crystal receives the first optical signal adjusted by the dimming assembly and the second optical signal according to the principle of birefringence, and merges them into a third optical signal, relying on the optical properties of the birefringent crystal to ensure that the two optical signals are correctly merged in the crystal. The wave combiner assembly is used to merge the third optical signal generated by each laser assembly into one channel. It is ensured that optical signals of different wavelengths are output through a single output channel, achieving the goal of single-channel output.
[0039] See also Figure 2 , 8 100G LD chips are divided into 4 groups, each laser assembly includes two 100G LD chips, that is, the first laser and the second laser can use 100G LD chips. The first laser and the second laser can be chips that can transmit light at a rate of 100G; therefore, this solution can achieve 800G rate output, and the first laser and the second laser included in each laser assembly emit the same wavelength, and in this embodiment, 4 optical signals with different wavelengths can be emitted; then, the first optical signal emitted by the first laser and the second optical signal emitted by the second laser are combined into one through other structures to obtain four third optical signals, and the wavelength of the third optical signal obtained by each laser assembly is consistent with the wavelength of the optical signal emitted by its corresponding laser assembly; the four third optical signals with different wavelengths are combined through the combining assembly, and finally, the output of four optical signals with different wavelengths can be realized through a single FA assembly, and the four wavelength optical signals will not affect each other.
[0040] It is worth noting that the structure proposed in this embodiment and its corresponding processing of the optical signal are dependent on the physical properties of the structure, which will not be described in detail in this embodiment. Other structures in this embodiment will be described in detail below.
[0041] In a preferred embodiment, Figure 2As shown, a lens and an isolator are also provided on the optical path for transmitting the first optical signal and the second optical signal; the lens is used to collimate the first optical signal and transmit the collimated first optical signal to the isolator, and the isolator is used to prevent the first optical signal from being reflected; after the first optical signal passes through the isolator, it is transmitted to the dimming component; the lens is also used to collimate the second optical signal and transmit the collimated second optical signal to the isolator, and the isolator is used to prevent the second optical signal from being reflected.
[0042] The lens is used to collimate the first optical signal emitted by the first laser, that is, to adjust the propagation direction of the first optical signal to make it more parallel. This helps to ensure that the first optical signal can be accurately transmitted in the subsequent optical path. The collimated first optical signal is transmitted to the isolator. Similarly, for the second optical signal emitted by the second laser, the lens also performs the same collimation function and transmits the collimated second optical signal to the isolator.
[0043] The function of the isolator is to prevent the optical signal from being reflected. For the first optical signal, the isolator receives the collimated first optical signal and prevents it from being reflected on the way. The isolator ensures that the first optical signal is transmitted to the dimming component without reflection after passing through. Similarly, for the second optical signal, the isolator also prevents reflection. The addition of lenses and isolators helps to optimize the transmission path of optical signals, reduce unnecessary reflections, and ensure the stable transmission of optical signals in the entire system.
[0044] It is worth noting that in this embodiment, since there are 4 groups of laser components, each group of laser components includes two lasers, therefore, in this embodiment, 8 lenses can be set separately, and these 8 lenses need to be coupled separately to make 8 optical signals output horizontally, and 8 isolators need to be set to prevent the 8 optical signals from being reflected and affecting the stability of subsequent output light. In a preferred embodiment, the 8 lenses can be set as a whole to reduce the complexity of the entire structure. Similarly, the 8 isolators can be set as an isolator without affecting the effect, and at the same time prevent the 8 optical signals from being reflected to reduce the complexity of the entire structure. More specifically, no further explanation is given in this embodiment.
[0045] In a preferred embodiment, Figure 3 As shown, the dimming component includes a prism, and the prism is arranged between the first laser and the birefringent crystal; the prism is used to correct the displacement of the optical signal.
[0046] The prism is usually made of a transparent optical material (such as glass), and its main function is to change the propagation direction of light by refracting light. The prism used in the dimming component may adopt different structures and types, depending on the design and performance requirements of the system. A right-angle prism is one of the most common types of prisms, and its two optical surfaces form a right angle. It can be used to change the propagation direction of light and is suitable for situations where a 90-degree displacement is required. In the dimming component, the right-angle prism can be used to correct the path of the first light signal. The grating prism has a tiny grating structure on the surface that can disperse the spectrum. This prism can be used to separate and adjust light of different wavelengths and is suitable for applications that require fine adjustment of the spectrum. The cross-section of the wedge prism is wedge-shaped, so that the light is deflected when passing through. This prism can be used to fine-tune the incident angle of light, which is very effective for situations where small adjustments are required. In this embodiment, a right-angle prism can be selected.
[0047] The prism is used to correct the displacement of the first optical signal transmitted from the isolator. Prisms are often used in optical systems to refract light and achieve correction or deflection by changing the propagation direction of light. In this case, the prism is used to adjust the path of the first optical signal to ensure that it matches the optical path of the birefringent crystal. By using a prism for displacement correction, the dimming component can effectively adjust the first optical signal to meet the requirements of entering the birefringent crystal.
[0048] In a preferred embodiment, see Figure 3 The dimming component further includes a polarizer, which is disposed between the prism and the birefringent crystal, and is used to adjust the polarization state of the optical signal. The polarizer is used to adjust the polarization state of the first optical signal transmitted from the prism to a preset angle before transmitting it to the birefringent crystal.
[0049] A polarizer is an optical element that selectively transmits or blocks polarized light in a specific direction. Linear polarizers are one of the most common types of polarizers, which only allow linear polarized light in a specific direction to pass through, while absorbing or blocking polarized light in other directions. Circular polarizers convert linear polarized light into circularly polarized light, which can be divided into two types: left-handed and right-handed. This type of polarizer uses an absorbing material to weaken or absorb unwanted polarized light. It can achieve higher optical performance, but it may also introduce some light loss. Film polarizers use a substrate coated with a special film layer, which selectively transmits or blocks polarized light in a specific direction through the action of the film layer. When selecting a polarizer, it is necessary to consider the performance requirements, optical properties, and required polarization adjustment range of the system. This is not specifically limited in this embodiment.
[0050] The function of the polarizer is to adjust the polarization state of the first light signal transmitted from the prism, and then adjust its transmission direction to a preset angle, which can be 90°, and then transmit it to the birefringent crystal. The polarizer can have different polarization properties, such as linear polarization, circular polarization, etc., depending on the system's requirements for polarization control. After adjusting the polarization state of the first light signal, it will be transmitted to the birefringent crystal at a preset angle. In order to ensure that the characteristics of the light signal can be effectively utilized in the birefringent crystal to achieve the dimming effect required by the system.
[0051] In general, the combination of the prism and the polarizer in the dimming component provides a more flexible optical control for the subsequent system by displacing and polarizing the optical signal to meet the requirements of specific applications. When the dimming component includes only a prism but no polarizer, the light emitting position of the first laser is mounted vertically sideways so that the polarization state of the first optical signal is perpendicular to the polarization state of the second optical signal.
[0052] Wherein, when the dimming component only includes a prism but not a polarizer, the first laser is mounted vertically sideways (i.e., the first laser is rotated 90° with the optical axis as the rotation axis by mounting), so that the polarization state of the first light signal emitted by the first laser and the polarization state of the second light signal emitted by the second laser are perpendicular to each other, and then after passing through other structures, the first light signal and the second light signal with perpendicular polarization states are incident on the birefringent crystal to be combined into one path, so as to ensure that the optical component can maintain accurate position and performance after assembly.
[0053] This embodiment combines multiple signals into one path through a birefringent crystal and a wave combining component, so as to output through a single FA component. On the one hand, the optical module includes multiple laser components, multiple birefringent crystals, a wave combining component and a FA component; a birefringent crystal is arranged between each laser component and the wave combining component; two optical signals with mutually perpendicular polarization states are first combined into one path through the birefringent crystal, and then the optical signals from the multiple birefringent crystals are combined into one path through the wave combining component, so as to output through a single FA component. On the other hand, the optical module includes multiple laser components, a wave combining component, a birefringent crystal and a FA component; the optical signals emitted by the multiple laser components are first combined into two paths through the wave combining component; and the two optical signals with mutually perpendicular polarization states are combined into one path through the birefringent crystal, so as to output through a single FA component.
[0054] It should be noted that the laser assembly of this embodiment includes two lasers, and the two lasers can be integrated together; the two lasers can also be set independently. In this embodiment, multiple lasers are divided based on the wavelength of the optical signal emitted by the laser for the convenience of description.
[0055] Embodiment 2:
[0056] In the first embodiment, an optical module that realizes single-channel output by means of the birefringence principle is proposed. In the present embodiment, another optical module that realizes single-channel output by means of the birefringence principle is proposed. In a preferred embodiment, Figure 4 As shown, it includes multiple laser components, a wave combining component, a birefringent crystal and an FA component; wherein each laser component is used to emit optical signals of different wavelengths; the wave combining component is used to combine the optical signals emitted by the multiple laser components into two paths; the birefringent crystal is used to combine the two optical signals with mutually perpendicular polarization states into one path, so as to output through a single FA component. wherein the birefringent crystal is a YVO4 crystal.
[0057] In a preferred embodiment, reference Figure 4 The optical module that realizes single-channel output through the principle of birefringence also includes a first laser component, a second laser component, a third laser component, a fourth laser component and a wave combining component; the wave combining component is used to couple the optical signal emitted by the first laser component with the optical signal emitted by the second laser component to obtain a first optical signal; the wave combining component is also used to couple the optical signal emitted by the third laser component with the optical signal emitted by the fourth laser component to obtain a second optical signal. Figure 4 In this embodiment, a dimming component is also included, and the dimming component is arranged between the wave combining component and the birefringent crystal.
[0058] The dimming component includes: a prism and a polarizer. The prism is arranged between the wave combining component and the birefringent crystal, and the prism is used to correct the displacement of the optical signal; the polarizer is arranged between the prism and the birefringent crystal, and the polarizer is used to adjust the polarization state of the optical signal. The dimming component is used to adjust the first optical signal to match the optical path of the birefringent crystal; the birefringent crystal is used to combine the first optical signal adjusted by the dimming component and the second optical signal to achieve a single-channel output of optical signals of different wavelengths.
[0059] Among them, continue to refer to Figure 4 In this embodiment, the optical module that realizes single-channel output by the principle of birefringence also includes a lens, an isolator and a dimming component. The functions of the lens, isolator and dimming component refer to embodiment 1 and will not be described in detail in this embodiment.
[0060] In this embodiment, the four laser components are first divided into two groups, and the two groups are coupled into one group through a wave combining component, and the wave combining component is an AWG component. The specific structure and implementation principle of the AWG component are not described in detail in this embodiment. The first optical signal and the second optical signal are obtained respectively, and then the first optical signal is adjusted by the dimming component, and is incident on the birefringent crystal together with the second optical signal, so as to also realize the single-channel output of optical signals of different wavelengths.
[0061] Regarding another structure of the optical module that realizes single-channel output by the principle of birefringence, refer to Example 1, which will not be described in detail in this embodiment.
[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An optical module that achieves single-channel output through the principle of birefringence. It is characterized in that include: A plurality of laser components, a plurality of birefringent crystals, a wave combining component and an FA component; wherein each laser component is used to emit an optical signal of a different wavelength; and a birefringent crystal is arranged between each of the laser components and the wave combining component; The birefringent crystal is used to synthesize two optical signals with polarization states perpendicular to each other into one; The wave combining component is used to combine the optical signals from the plurality of birefringent crystals into one path so as to output through a single FA component.
2. The optical module for realizing single-channel output by using the birefringence principle according to claim 1, It is characterized in that The optical module further includes: a plurality of dimming components; the dimming components are arranged between the laser component and the birefringent crystal.
3. The optical module for realizing single-channel output by using the birefringence principle according to claim 2, It is characterized in that The laser assembly includes a first laser and a second laser, wherein the first laser and the second laser are used to emit optical signals of the same wavelength; The dimming component includes a prism, and the prism is arranged between the first laser and the birefringent crystal; The prism is used to correct the displacement of the optical signal.
4. The optical module for realizing single-channel output by using the birefringence principle according to claim 3, It is characterized in that The dimming component further includes a polarizer, which is disposed between the prism and the birefringent crystal and is used to adjust the polarization state of the optical signal.
5. The optical module according to any one of claims 1 to 4, which realizes single-channel output by using the birefringence principle. It is characterized in that The wave combining component is a Z-block component.
6. An optical module that realizes single-channel output through the principle of birefringence, It is characterized in that It includes a plurality of laser components, a wave combining component, a birefringent crystal and an FA component; wherein each laser component is used to emit an optical signal of a different wavelength; The wave combining component is used to combine the optical signals emitted by the multiple laser components into two paths; The birefringent crystal is used to combine two optical signals whose polarization states are perpendicular to each other into one optical signal, so as to output the signal through a single FA component.
7. The optical module for realizing single-channel output by using the birefringence principle according to claim 6, It is characterized in that The wave combining component is an AWG component.
8. The optical module for realizing single-channel output by using the birefringence principle according to claim 6, It is characterized in that The optical module further comprises: a dimming component; the dimming component is arranged between the wave combining component and the birefringent crystal.
9. The optical module for realizing single-channel output by using the birefringence principle according to claim 8, It is characterized in that The dimming component includes: a prism and a polarizer, wherein the prism is arranged between the wave combining component and the birefringent crystal, and the prism is used to correct the displacement of the optical signal; The polarizer is arranged between the prism and the birefringent crystal, and is used to adjust the polarization state of the optical signal.
10. The optical module realizing single-channel output by using the birefringence principle according to any one of claims 6 to 9, It is characterized in that The birefringent crystal is a YVO4 crystal.