Wavelength division multiplexing and demultiplexing optical device

Abstract

The utility model relates to the technical field of optical communication devices, and provides a wavelength division multiplexing and demultiplexing optical device which comprises a Z-Block, the Z-Block is vertically arranged in the direction perpendicular to the horizontal plane and comprises a substrate and a plurality of filtering assemblies, the substrate comprises a first surface and a second surface which are located on the two sides of the substrate respectively, and the first surface and the second surface are arranged on the Z-Block. The first surface and the second surface are inclined at a preset angle relative to the horizontal plane, and the plurality of filtering assemblies are sequentially arranged along the inclination direction of the first surface; when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, light paths emitted by the vertical light emitting channels in one-to-one correspondence with the multiple filtering assemblies can be emitted to the corresponding multiple filtering assemblies respectively and then are emitted to an optical fiber from the filtering assembly at the outermost edge in the multiple filtering assemblies. The device has the advantages of few components, simple structure and few alignment steps.

Description

Technical Field

[0001] The present application relates to the technical field of optical communication devices, and more specifically, to a wavelength division multiplexing and demultiplexing optical device. Background Art

[0002] Wavelength division multiplexing and demultiplexing optical devices are important optical passive devices in the field of optical communications. As the transmission capacity in the field of optical communications continues to grow, wavelength division multiplexing technology makes full use of its advantage of outputting light of different wavelengths in one optical fiber, increasing the transmission capacity in one optical fiber by several times or dozens of times, greatly reducing costs.

[0003] SWDM (Short Wavelength Division Multiplexing) is one of the MSA protocol standards for multimode optical modules. Its key feature is that the wavelengths used for wavelength division multiplexing are four wavelengths of 850nm to 940nm, which corresponds to the emission wavelength of the VCSEL laser. VCSEL lasers have the characteristic of emitting light perpendicular to the surface. In conventional designs, a 45° prism is required to convert the vertically emitted light into lateral transmission.

[0004] Z-Block is one of the commonly used devices for wavelength division multiplexing of optical modules. The disadvantages of the wavelength division multiplexing solution of Z-Block optical modules in the prior art are: 1. The optical path is assembled horizontally, and an additional 45° prism is required. The actual situation is divided into: when the conventional Z-Block solution is used for SWDM, both the transmitting and receiving ends require a 45-degree prism; when used for other types of wavelength division multiplexing, usually only the receiving end needs to add a 45-degree prism. 2. There are many discrete devices in the optical path, and alignment is difficult. If passive alignment is used, the insertion loss introduced by alignment is large; if active alignment is used, the alignment process is cumbersome and the processing time is long.

[0005] In addition, Arrayed Waveguide Gratings (AWG) is a typical silicon photonics device that uses the diffraction of light to achieve wavelength division multiplexing / demultiplexing. It is also one of the commonly used wavelength division multiplexing devices. However, due to the high coupling accuracy requirements between optical fiber and silicon photonic chips and large insertion loss, the full silicon photonics solution has not yet been applied to optical modules in large quantities. The current common delivery form of AWG devices is the packaged chip coupled with an optical fiber jumper. Compared with the Z-Block solution, its disadvantage is that the insertion loss is relatively large, ranging from -1.7 to -3.4dB. Since AWG is required for both transmission and reception in the wavelength division multiplexing solution, its total insertion loss is -3.4 to -6.8dB. A large power margin needs to be reserved at the receiving and transmitting ends of the optical module to compensate for the loss, resulting in an increase in the cost of other devices selected at the transmitting and receiving ends. In addition, since its implementation method is based on diffraction, AWG wavelength division multiplexing does not support multimode light and cannot be used for SWDM. Utility Model Content

[0006] The main purpose of the utility model is to provide a wavelength division multiplexing and demultiplexing optical device, aiming to solve the technical problems of the wavelength division multiplexing solution in the prior art that the components are many, the structure is complex, and the alignment process is complicated.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a wavelength division multiplexing and demultiplexing optical device, which includes:

[0008] A Z-Block, wherein the Z-Block is vertically arranged in a direction perpendicular to a horizontal plane, the Z-Block comprises a substrate and a plurality of filter components, the substrate comprises a first surface and a second surface respectively located on two sides thereof, the second surface is located above the first surface, the first surface corresponds to the inner side and the outer side of the substrate for a light transmission surface and a light reflection surface, the second surface corresponds to the inner side of the substrate for a light reflection surface, and the first surface and the second surface are both inclined at a preset angle to the horizontal plane, and the plurality of filter components are sequentially arranged along the inclination direction of the first surface;

[0009] When the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the light paths emitted by the vertical light emission channels corresponding to the multiple filter components can be respectively emitted to the corresponding multiple filter components and then emitted from the outermost filter component among the multiple filter components to the optical fiber.

[0010] Furthermore, the filter component is a filter plate; or, the multiple filter components are multiple areas of optical coating.

[0011] Furthermore, the first filter component among the multiple filter components can transmit the corresponding transmission wavelengths of all subsequent filter components, the corresponding transmission wavelengths of the filter components subsequent to the first filter component are different, and each filter component subsequent to the first filter component can reflect light of the transmission wavelength corresponding to the subsequent filter component.

[0012] Furthermore, the plurality of filter components are arranged in sequence along the direction of arrangement thereof: a first filter component, a second filter component, a third filter component and a fourth filter component; the first filter component corresponds to a reflection wavelength of 940 nm, and a corresponding transmission wavelength of 910 nm, 880 nm and 850 nm; the second filter component corresponds to a reflection wavelength of 880 nm and 850 nm, and a corresponding transmission wavelength of 910 nm; the third filter component corresponds to a reflection wavelength of 850 nm, and a corresponding transmission wavelength of 880 nm; the fourth filter component corresponds to a transmission wavelength of 850 nm;

[0013] Alternatively, the first filter component corresponds to a reflection wavelength of 850nm, and a corresponding transmission wavelength of 880nm, 910nm and 940nm; the second filter component corresponds to a reflection wavelength of 910nm and 940nm, and a corresponding transmission wavelength of 880nm; the third filter component corresponds to a reflection wavelength of 940nm, and a corresponding transmission wavelength of 910nm; the fourth filter component corresponds to a transmission wavelength of 940nm.

[0014] Furthermore, the wavelength division multiplexing and demultiplexing optical device includes a lens structure, and the Z-Block is fixed to the lens structure.

[0015] Further, the lens structure includes a main structure and a first lens and a second lens arranged on the main structure, the Z-Block is fixed to the main structure, and when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens is used for collimation, the second lens is used for focusing, the number of the first lenses is consistent with the number of the multiple filter components, and the multiple first lenses are located one-to-one on the optical path between each filter component and the corresponding vertical light emission channels, and the second lens is located on the optical path between the optical fiber and the first filter component among the multiple filter components; when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens is used for focusing, the second lens is used for collimation, the number of the first lens is consistent with the number of the multiple filter components, and the multiple first lenses are located on the optical path between each filter component and the corresponding optical detectors, and the second lens is located on the optical path between the optical fiber and the first filter component among the multiple filter components.

[0016] Furthermore, at least two second lenses are arranged along the thickness direction of the main structure, and a plurality of first lenses are arranged in at least two rows along the thickness direction of the main structure, and the number of rows is consistent with the number of the second lenses, and each second lens and the first lens share one Z-Block.

[0017] Furthermore, the main structure has a receiving groove, and the Z-Block is fixed in the receiving groove.

[0018] Furthermore, the middle part of the main structure in the thickness direction has an L-shaped structure, and the L-shaped structure includes a horizontal part extending in the horizontal direction and a vertical part connected to the horizontal part and extending in the vertical direction, the second lens is arranged on the vertical part, and the first lens is arranged on the horizontal part.

[0019] Furthermore, the lens structure is an integrated structure.

[0020] The beneficial effects of the wavelength division multiplexing and demultiplexing optical device provided in this application are:

[0021] Since in the wavelength division multiplexing and demultiplexing optical device provided by the embodiment of the utility model, the Z-Block is vertically arranged in a direction perpendicular to the horizontal plane, the substrate includes a first surface and a second surface respectively located on both sides thereof, the first surface corresponds to the inner side and the outer side of the substrate for the light transmission surface and the light reflection surface, the second surface corresponds to the inner side of the substrate for the light reflection surface, and the first surface and the second surface are inclined at a preset angle to the horizontal plane. Therefore, when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing or wavelength division multiplexing, the corresponding multiple light paths are reflected on the light reflection surfaces (the first surface corresponds to the inner side and the outer side of the substrate, and the second surface corresponds to the inner side of the substrate) on the same device (Z-Block), so compared with the solution in which each light reflection surface in the traditional wavelength division multiplexing and demultiplexing optical device needs to be manufactured separately and assembled and aligned, the wavelength division multiplexing and demultiplexing optical device provided by the embodiment of the utility model has the advantages of a small number of components, a simple structure, and a small number of alignment steps, thereby reducing the total cost and total working hours of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the optical path of a wavelength division multiplexing and demultiplexing optical device provided in one embodiment of the present application;

[0024] Figure 2 A top view of a lens structure in a wavelength division multiplexing and demultiplexing optical device provided by one embodiment of the present application;

[0025] Figure 3 A central cross-sectional view in the thickness direction of a lens structure in a wavelength division multiplexing and demultiplexing optical device provided by one embodiment of the present application;

[0026] Figure 4 A side view of a lens structure in a wavelength division multiplexing and demultiplexing optical device provided by one embodiment of the present application;

[0027] Figure 5 A top view of a Z-Block in a wavelength division multiplexing and demultiplexing optical device provided by one embodiment of the present application;

[0028] Figure 6 A top view of a lens structure in a wavelength division multiplexing and demultiplexing optical device provided by another embodiment of the present application.

[0029] The reference numerals in the above drawings are as follows:

[0030] 1- optical fiber; 2- vertical cavity surface emitting laser;

[0031] 100-Z-Block; 101-substrate;

[0032] 102-first surface; 103-second surface;

[0033] 104-a first filter component; 105-a second filter component;

[0034] 106-third filter component; 107-fourth filter component;

[0035] 108-protrusion structure; 200-lens structure;

[0036] 201-main structure; 202-first lens;

[0037] 203-second lens; 204-optical fiber interface;

[0038] 205-accommodating slot; 206-installing slot;

[0039] 207- horizontal part; 208- vertical part. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0045] See also Figure 1 The present invention provides a wavelength division multiplexing and demultiplexing optical device, which is particularly suitable for but not limited to SWDM, including:

[0046] Z-Block100, Z-Block100 is vertically arranged in a direction perpendicular to the horizontal plane, Z-Block100 includes a substrate 101 and a plurality of filter components, the substrate 101 includes a first surface 102 and a second surface 103 respectively located on two sides thereof, the second surface 103 is located above the first surface 102, the first surface 102 corresponds to the inner side and the outer side of the substrate 101 for the light transmission surface and the light reflection surface, the second surface 103 corresponds to the inner side of the substrate 101 for the light reflection surface, the second surface 103 is only used for the light reflection surface, the second surface 103 can be coated to increase the reflectivity, and the first surface 102 and the second surface 103 are both inclined at a preset angle to the horizontal plane, the preset angle is, for example, 45°, or can be flexibly set as needed, and the plurality of filter components are arranged in sequence along the inclined direction of the first surface 102;

[0047] When the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the light paths emitted by the vertical light emission channels corresponding to the multiple filter components can be respectively emitted to the corresponding multiple filter components and then emitted from the edgemost filter components among the multiple filter components to the optical fiber 1, so as to Figure 1 For example, the "most edge filter component" can be understood as Figure 1 The top filter component is Figure 1 Taking the orientation in as an example, multiple filter components are each directed downward in the vertical direction toward their corresponding vertical light emission channels, which are specifically emitted by the multi-channel vertical cavity surface emitting laser 2. Different vertical light emission channels correspond to different wavelengths. The topmost of the multiple filter components is directed horizontally toward the optical fiber 1, so that the different wavelengths of light emitted by different channels can be combined into one beam, which is then coupled to the optical fiber 1 for transmission through a lens.

[0048] It can be understood that when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the vertical cavity surface emitting laser 2 is replaced by a corresponding number of optical detectors, and a PIN type optical detector can be used. The light is horizontally emitted from the optical fiber 1 to the wavelength division multiplexing and demultiplexing optical device provided in the embodiment of the utility model, and is split by the optical device and irradiated to each optical detector respectively. The detector then converts the optical signal into an electrical signal.

[0049] Since in the wavelength division multiplexing and demultiplexing optical device provided by the embodiment of the utility model, the Z-Block 100 is vertically arranged in a direction perpendicular to the horizontal plane, the substrate 101 includes a first surface 102 and a second surface 103 respectively located on both sides thereof, the first surface 102 corresponds to the inner side and the outer side of the substrate 101 for the light transmission surface and the light reflection surface, the second surface 103 corresponds to the inner side of the substrate 101 for the light reflection surface, and the first surface 102 and the second surface 103 are both inclined at a preset angle to the horizontal plane, therefore, when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing or wavelength division multiplexing, the corresponding multiple The optical paths are reflected on the light reflecting surfaces (the first surface 102 corresponds to the inner and outer sides of the substrate 101, and the second surface 103 corresponds to the inner side of the substrate 101, but it is not limited to this, refer to the following) on ​​the same device (Z-Block 100, so compared with the traditional wavelength division multiplexing and demultiplexing optical devices, each light reflecting surface needs to be manufactured separately and assembled and aligned, the wavelength division multiplexing and demultiplexing optical device provided by the embodiment of the utility model has the advantages of a small number of components, a simplified structure, and a small number of alignment (including active alignment and passive alignment) steps, thereby reducing the total production cost and total working hours.

[0050] According to an embodiment of the present invention, the filter component is a filter plate; or, the plurality of filter components are a plurality of regions of an optical coating, and the present invention is described in detail in the form of a filter plate.

[0051] See also Figures 1 to 4 According to an embodiment of the utility model, the wavelength division multiplexing and demultiplexing optical device includes a lens structure 200. The lens structure 200 preferably uses a plastic lens. The main advantages of the plastic lens are low cost and easy processing. A glass lens can also be used. Z-Block 100 is fixed to the lens structure 200.

[0052] Specifically, the lens structure 200 includes a main structure 201 and a first lens 202 and a second lens 203 arranged on the main structure 201. The position of the lens structure 200 corresponding to the second lens 203 has an optical fiber interface 204, which can adopt an LC optical fiber interface. LC is a type of optical fiber connector. Because the appearance size is only half of the SC / ST / FC connector, it belongs to a small connector type (SFF). Z-Block100 is fixed to the main structure 201. When the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens 202 is used for collimation, and the second lens 203 is used for focusing. The number of the first lens 202 is the same as that of the plurality of filters. The number of wavelength components is consistent, and the multiple first lenses 202 are located one by one on the optical path between each filter component and the corresponding vertical light emission channel, and the second lens is located on the optical path between the optical fiber 1 and the first filter component 104 among the multiple filter components; when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens 202 is used for focusing, and the second lens 203 is used for collimation. The number of the first lenses 202 is consistent with the number of the multiple filter components, and the multiple first lenses 202 are located on the optical path between each filter component and the corresponding optical detectors, and the second lens 203 is located on the optical path between the optical fiber 1 and the first filter component 104 among the multiple filter components.

[0053] Taking the wavelength division multiplexing and demultiplexing optical devices for wavelength division multiplexing as an example, the wavelength division multiplexing and demultiplexing optical devices provided by the embodiment of the utility model have fewer alignment steps, and only one passive alignment step is required, that is, the alignment of the optical fiber interface 204 of the lens structure 200, and the alignment of the LC adapter to the LC optical fiber interface. The passive alignment can be at the beginning and the end of the alignment operation. The two-step active alignment first aligns the lens structure 200 to the PCB or FPC, and actively couples. It is necessary to insert the coupling optical fiber from the top, and then align the Z-Block 100 to the lens structure 200, actively couple, and power on the test. A single end includes a total of 3 components to be aligned: Z-Block 100, lens structure 200 and LC adapter.

[0054] See also Figure 1 According to an embodiment of the utility model, a first filter component among a plurality of filter components can transmit the corresponding transmission wavelengths of all subsequent filter components, the corresponding transmission wavelengths of the filter components subsequent to the first filter component are different, and each filter component subsequent to the first filter component can reflect the light of the corresponding transmission wavelength of the subsequent filter component, so that Figure 1 For example, if the first filter component is the top filter component, "after" is understood as "below" and "after" is understood as "below". As a specific example, multiple filter components are arranged along their arrangement direction (for example Figure 180nm and 850nm; the reflection wavelengths corresponding to the second filter component 105 are 880nm and 850nm, and the corresponding transmission wavelength is 910nm; the reflection wavelengths corresponding to the third filter component 106 are 850nm, and the corresponding transmission wavelength is 880nm; the transmission wavelength corresponding to the fourth filter component 107 is 850nm. Specifically, each of the multiple filter components is downward in the vertical direction toward its corresponding vertical light emission channel, that is, the corresponding four vertical cavity surface emitting lasers 2. The specific form of the vertical cavity surface emitting laser 2 is a chip mounted on a PCB. The four channels correspond to the first filter component 104, the second filter component 105, the third filter component 106 and the fourth filter component 107, respectively. Light with wavelengths of 940nm, 910nm, 880nm and 850nm is emitted. Light with different wavelengths, such as 940nm, 910nm, 880nm and 850nm, is emitted vertically upward from the vertical cavity surface emitting laser 2 below, wherein the light with a wavelength of 940nm is collimated by the corresponding first lens 202 on the lens structure 200 and arrives at the first filter component 104, and is reflected by the first filter component 104 and then focused by the second lens 203 on the lens structure 200 and enters the optical fiber 1, and the light with a wavelength of 910nm, 880nm and 850nm is collimated by the corresponding first lens 202 on the lens structure 200 and then input into the Z-Block 100, and after multiple reflections and combination in the Z-Block 100, is horizontally output from the left side of the first filter component 104, and then is focused by the second lens 203 on the lens structure 200 and enters the optical fiber 1. Of course, more filter components can be designed as needed to multiplex or demultiplex more lights with different wavelengths.

[0055] Of course, in this embodiment, the first filter component 104 may have a corresponding reflection wavelength of 850nm, and a corresponding transmission wavelength of 880nm, 910nm and 940nm; the second filter component 105 may have a corresponding reflection wavelength of 910nm and 940nm, and a corresponding transmission wavelength of 880nm; the third filter component 106 may have a corresponding reflection wavelength of 940nm, and a corresponding transmission wavelength of 910nm; and the fourth filter component 107 may have a corresponding transmission wavelength of 940nm.

[0056] In fact, the first filter component 104 can also be a light reflecting surface of Z-Block 100. Strictly speaking, the first filter component 104 is not a surface reflecting device. It can be simplified as a multi-layer periodic structure. Every few layers reflect a part of the energy, and finally reflect most of the energy together.

[0057] As another embodiment, the direction of Z-Block 100 remains unchanged, the direction of the lens structure 200 remains unchanged, and the positions of the first lens 202 and the second lens 203 relative to the main structure 201 are changed. For example, the first lens 202 is replaced to the upper surface of the original horizontal portion 207, and the second lens 203 is replaced to the right surface of the original vertical portion 208. By (optionally) adjusting the structural parameters of the first lens 202 and the second lens 203, and (optionally) adjusting the relative spacing between the optical fiber 1 and the lens structure 200, the vertical portion and the Z-Block 100, the Z-Block 100 and the horizontal portion 207, and the horizontal portion 207 and the vertical cavity surface emitting laser 2, through such adjustments in the optical design, wavelength division multiplexing and demultiplexing functions of light of different wavelengths can still be achieved.

[0058] See also Figure 6 According to a preferred embodiment of the present utility model, at least two second lenses 203 are arranged along the thickness direction of the main structure 201, such as two as shown in the figure, and multiple first lenses 202 are arranged in at least two rows along the thickness direction of the main structure 201, and the number of rows is consistent with the number of second lenses 203, such as two rows as shown in the figure. Each second lens 203 and the first lens 202 share a Z-Block 100. As the number of rows of the first lenses 202 and the number of the second lenses 203 in the thickness direction of the main structure 201 increases, the Z-Block 100 is also thickened accordingly. More rows of the first lenses 202 and the second lenses 203 are arranged in the thickness direction of the main structure 201. In order to realize the transceiver function of the optical module, two lens structures 200 and two Z-Blocks 100 are needed. If the two lens structures 200 are merged and the two Z-Blocks 100 are merged, the wavelength division multiplexing and demultiplexing optical device provided in this embodiment can realize integrated transceiver, further reducing the total number of devices and the number of alignment steps. Theoretically, in this embodiment, more rows of first lenses 202 and second lenses 203 can be arranged in the thickness direction to further thicken the Z-Block 100 so as to multiplex and demultiplex more channels, for example, merging 8 transceiver channels into 2 optical fibers for 2 reception and 2 transmission.

[0059] See also Figures 2 to 5According to an embodiment of the present invention, a receiving groove 205 is provided on the main structure 201 , and the Z-Block 100 is fixedly disposed in the receiving groove 205 . Z-Block 100 is preferably fixed to the receiving groove 205 by gluing (preferably glue with small shrinkage and thermal expansion coefficient matching that of the optical material, such as epoxy resin glue). Specifically, the two inner wall surfaces corresponding to the receiving groove 205 have mounting grooves 206. Z-Block 100 includes protruding structures 108 (such as bump structures) arranged on both sides of the substrate 101. Each protruding structure 108 is initially positioned in the mounting grooves 206 of the two inner wall surfaces corresponding to the receiving groove 205, or each protruding structure 108 is only supported in the corresponding mounting groove 206. During specific operation, glue is first dispensed on the mounting groove 206, and active alignment is performed to adjust the relative position of Z-Block 100 and lens structure 200. After the position is determined, the glue is cured to fix the protruding structure 108 to the mounting groove 206, thereby curing the determined position to achieve precise positioning of Z-Block 100.

[0060] See also Figure 1 According to an embodiment of the present invention, the middle part of the main structure 201 in the thickness direction has an L-shaped structure, and the L-shaped structure includes a horizontal portion 207 extending in the horizontal direction and a vertical portion 208 connected to the horizontal portion 207 and extending in the vertical direction. The second lens 203 is arranged on the vertical portion 208, and the first lens 202 is arranged on the horizontal portion 207. Such an L-shaped structure design facilitates the arrangement of the first lens 202 and the second lens 203 at corresponding positions. If appropriate, the L-shaped structure may not be adopted. In addition, the lens structure 200 is an integrated structure, which greatly simplifies the number of components of the wavelength division multiplexing and demultiplexing optical device of the embodiment of the present invention. As another embodiment, the lens structure 200 can also be formed by connecting multiple split components (for example, by bonding or other connection methods).

[0061] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wavelength division multiplexing and demultiplexing optical device, characterized in that: include: A Z-Block, wherein the Z-Block is vertically arranged in a direction perpendicular to a horizontal plane, the Z-Block comprises a substrate and a plurality of filter components, the substrate comprises a first surface and a second surface respectively located on two sides thereof, the second surface is located above the first surface, the first surface corresponds to the inner side and the outer side of the substrate for a light transmission surface and a light reflection surface, the second surface corresponds to the inner side of the substrate for a light reflection surface, and the first surface and the second surface are both inclined at a preset angle to the horizontal plane, and the plurality of filter components are sequentially arranged along the inclination direction of the first surface; When the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the light paths emitted by the vertical light emission channels corresponding to the multiple filter components can be respectively emitted to the corresponding multiple filter components and then emitted from the outermost filter component among the multiple filter components to the optical fiber.

2. The wavelength division multiplexing and demultiplexing optical device according to claim 1, characterized in that: The filter component is a filter plate; or, the multiple filter components are multiple areas of optical coating.

3. The wavelength division multiplexing and demultiplexing optical device according to claim 1, characterized in that: The first filter component among the multiple filter components can transmit the corresponding transmission wavelengths of all subsequent filter components, the corresponding transmission wavelengths of the filter components subsequent to the first filter component are different, and each filter component subsequent to the first filter component can reflect light with a transmission wavelength corresponding to the subsequent filter component.

4. The wavelength division multiplexing and demultiplexing optical device according to claim 2, characterized in that: The plurality of filter components are arranged in order of a first filter component, a second filter component, a third filter component and a fourth filter component. The first filter component has a reflection wavelength of 940 nm and a transmission wavelength of 910 nm, 880 nm and 850 nm. The second filter component has a reflection wavelength of 880 nm and 850 nm and a transmission wavelength of 910 nm. The third filter component has a reflection wavelength of 850 nm and a transmission wavelength of 880 nm. The fourth filter component has a transmission wavelength of 850 nm. Alternatively, the first filter component corresponds to a reflection wavelength of 850nm, and a corresponding transmission wavelength of 880nm, 910nm and 940nm; the second filter component corresponds to a reflection wavelength of 910nm and 940nm, and a corresponding transmission wavelength of 880nm; the third filter component corresponds to a reflection wavelength of 940nm, and a corresponding transmission wavelength of 910nm; the fourth filter component corresponds to a transmission wavelength of 940nm.

5. The wavelength division multiplexing and demultiplexing optical device according to any one of claims 1 to 4, characterized in that: The wavelength division multiplexing and demultiplexing optical device comprises a lens structure, and the Z-Block is fixedly arranged on the lens structure.

6. The wavelength division multiplexing and demultiplexing optical device according to claim 5, characterized in that: The lens structure includes a main structure and a first lens and a second lens arranged on the main structure, the Z-Block is fixed to the main structure, and when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens is used for collimation, and the second lens is used for focusing, the number of the first lenses is consistent with the number of the multiple filter components, and the multiple first lenses are located one-to-one on the optical path between each filter component and the corresponding vertical light emission channels, and the second lens is located on the optical path between the optical fiber and the first filter component among the multiple filter components; when the wavelength division multiplexing and demultiplexing optical device is used for wavelength division multiplexing, the first lens is used for focusing, and the second lens is used for collimation, the number of the first lens is consistent with the number of the multiple filter components, and the multiple first lenses are located on the optical path between each filter component and the corresponding optical detectors, and the second lens is located on the optical path between the optical fiber and the first filter component among the multiple filter components.

7. The wavelength division multiplexing and demultiplexing optical device according to claim 6, characterized in that: At least two second lenses are arranged along the thickness direction of the main structure, and a plurality of first lenses are arranged in at least two rows along the thickness direction of the main structure, and the number of rows is consistent with the number of the second lenses, and each second lens and the first lens share one Z-Block.

8. The wavelength division multiplexing and demultiplexing optical device according to claim 6, characterized in that: The main structure is provided with a receiving groove, and the Z-Block is fixed in the receiving groove.

9. The wavelength division multiplexing and demultiplexing optical device according to claim 6, characterized in that: The middle part of the main structure in the thickness direction has an L-shaped structure, and the L-shaped structure includes a horizontal part extending in the horizontal direction and a vertical part connected to the horizontal part and extending in the vertical direction, the second lens is arranged on the vertical part, and the first lens is arranged on the horizontal part.

10. The wavelength division multiplexing and demultiplexing optical device according to claim 5, characterized in that: The lens structure is an integrated structure.

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