Light emitting assembly and optical module

Abstract

The utility model belongs to the technical field of optical communication, and discloses an optical emission assembly and an optical module. The assembly comprises a wavelength division multiplexing structure, a laser, an isolator and a bottom plate. The wavelength division multiplexing structure comprises a substrate and a wavelength division multiplexer arranged on the substrate, and the substrate is provided with a first side and a second side which are oppositely arranged; the lasers are arranged close to the first side. The isolator is arranged on the second side; light beams with different wavelengths emitted by the multiple groups of lasers can be combined into a single light beam through the wavelength division multiplexer, and the single light beam passes through the isolator; and the wavelength division multiplexing structure is fixed on the bottom plate. According to the utility model, the use of a plurality of groups of isolators can be avoided, the material cost is reduced, and meanwhile, the process cost can be reduced due to the open-type structural form.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to an optical transmitting component and an optical module. Background Art

[0002] High-speed optical module is an optoelectronic device that can convert electrical signals into optical signals for transmission, and convert optical signals into electrical signals for reception and processing. It consists of a light emitter, a receiver, and a control circuit, and is commonly used in communications, computers, data centers, and other fields to achieve high-speed data transmission and low power consumption.

[0003] As an optoelectronic device that can achieve high-speed transmission, high-speed optical modules play an important role in communications, computers, data centers, etc. With the continuous development of technology, the performance and application scope of high-speed optical modules are also expanding.

[0004] In view of the current prior art (see CN109031549A), an optical emission component is disclosed, in which an isolator is arranged between the LD output collimating lens and the wavelength division multiplexer, and an isolator is configured for each LD channel. The isolators are used in groups. Due to the high cost of the isolator, the cost of the entire optical emission component and the optical module increases; on the other hand, the optical emission component adopts a sealing structure of the second packaging shell, which leads to an increase in cost and increased process difficulty. Utility Model Content

[0005] The purpose of the utility model is to provide an optical emitting component and an optical module, which adopt an open structure and avoid the use of multiple groups of isolators, thereby reducing material costs and process costs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Optical transmitting assembly, comprising:

[0008] A wavelength division multiplexing structure, the wavelength division multiplexing structure comprising a substrate and a wavelength division multiplexer arranged on the substrate, the substrate having a first side and a second side arranged oppositely;

[0009] Lasers, a plurality of groups of the lasers are arranged close to the first side;

[0010] An isolator is arranged on the second side; the light beams of different wavelengths emitted by the plurality of groups of the lasers can be combined into a single light beam through the wavelength division multiplexer and pass through the isolator;

[0011] A base plate, on which the wavelength division multiplexing structure is fixed.

[0012] As an optional solution of the light emitting assembly, the light emitting assembly further includes a collimator, and the collimator is arranged on the base plate, and the light beam passing through the isolator can enter the collimator.

[0013] As an optional solution of a light emitting component, the collimator includes a capillary, a lens and a glass tube sleeved on the periphery of the capillary, the lens is arranged opposite to the isolator, and the light beam passing through the isolator passes through the lens and the capillary in sequence.

[0014] As an optional solution of the light emitting component, the light emitting component further includes an adapter component, the adapter component is connected to the collimator, and the light beam passing through the collimator can enter the adapter component.

[0015] As an optional solution of the light emitting component, the adapter component includes an adapter and an optical fiber plugged into the collimator, and the adapter is connected to an end of the optical fiber away from the collimator.

[0016] As an optional solution for an optical emission component, the isolator includes a light-transmitting surface and a light-blocking surface opposite to the light-transmitting surface, the isolator is bonded to the second side via the light-transmitting surface, and the light-blocking surface is provided with an anti-reflection film.

[0017] As an optional solution of the light emitting component, the light emitting component further includes a filter, and the filter is attached to the first side and is arranged in a one-to-one correspondence with the laser.

[0018] As an optional solution for a light emitting component, a collimating lens is provided on the optical path between the filter and the laser.

[0019] As an optional solution of an optical transmission component, the wavelength division multiplexer is bonded to the bottom plate through the substrate.

[0020] The optical module comprises a light receiving component and a light emitting component as described in any of the above schemes, wherein the light receiving component is used to receive an optical signal from the light emitting component.

[0021] Beneficial effects:

[0022] In the first aspect of the utility model, multiple groups of light beams are combined into a single light beam through the wavelength division multiplexing structure of the module and enter the isolator. Only one isolator needs to be set on the optical path to achieve isolation of far-end reflected light, which reduces the number of isolators and reduces material costs. Furthermore, the wavelength division multiplexing structure is directly fixed to the bottom plate through a substrate, which simplifies the coupling packaging of the module and adopts an open packaging structure to further reduce process costs and process difficulties.

[0023] In the second aspect of the present invention, the optical module based on the above optical emitting assembly can effectively reduce the cost of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view of a light emitting assembly provided by an embodiment of the utility model;

[0025] Figure 2 This is a front view of a light emitting assembly of a hidden laser provided by an embodiment of the utility model;

[0026] Figure 3 It is a side view of the light emitting assembly of the hidden laser provided by the embodiment of the utility model;

[0027] Figure 4 It is an internal optical path diagram of the wavelength division multiplexing structure provided by the embodiment of the utility model.

[0028] In the figure:

[0029] 1. WDM structure; 11. substrate; 111. first side; 112. second side; 2. laser; 3. isolator; 4. filter; 5. bottom plate; 6. collimator; 61. capillary; 62. lens; 63. glass tube; 7. adapter assembly; 71. adapter; 72. optical fiber; 8. collimating lens. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] Please see attached Figure 1 -Attached Figure 3 The first aspect of this embodiment relates to an optical transmission component (hereinafter referred to as "component"), which includes a wavelength division multiplexing structure 1, a laser 2, an isolator 3 and a bottom plate 5. The wavelength division multiplexing structure 1 includes a substrate 11 and a wavelength division multiplexer arranged on the substrate 11, the substrate 11 has a first side 111 and a second side 112 arranged opposite to each other; multiple groups of lasers 2 are arranged near the first side 111; the isolator 3 is arranged on the second side 112; the light beams of different wavelengths emitted by the multiple groups of lasers 2 can be combined into a single light beam through the wavelength division multiplexer and pass through the isolator 3; the wavelength division multiplexing structure 1 is fixed on the bottom plate 5.

[0035] In this embodiment, the wavelength division multiplexer is placed on the substrate 11, the laser 2 can emit a light beam, and multiple groups of lasers 2 can selectively emit a plurality of light beams of different wavelengths at the same time (see the attached Figure 4 The four groups of wavelengths of the light beams are λ1, λ2, λ3 and λ4 respectively), the light beam emitted by the laser 2 enters the wavelength division multiplexer through the first side 111, and then the wavelength division multiplexer synthesizes multiple groups of light beams with different wavelengths into a single light beam and enters the isolator 3. The isolator 3 is arranged at the position corresponding to the single light beam exit port on the second side 112 of the substrate 11, and the wavelength division multiplexing structure 1 is fixed on the bottom plate 5 through the substrate 11. The isolator 3 is an important component widely used in optical communication and other optical systems. It mainly has the characteristics of allowing optical signals to pass unidirectionally and preventing them from propagating in the reverse direction, that is, the single light beam synthesized after passing through the wavelength division multiplexer can enter the isolator 3, and other light beams incident from the opposite side of the isolator 3 are isolated and blocked by the isolator 3.

[0036] Through the wavelength division multiplexing structure 1 of this module, multiple groups of light beams are combined into a single light beam and enter the isolator 3. Only one isolator 3 needs to be set on the optical path to achieve isolation of the far-end reflected light, which reduces the number of isolators 3 and also reduces the material cost. Furthermore, in this embodiment, the wavelength division multiplexing structure 1 is directly fixed on the bottom plate 5 through the substrate 11, which simplifies the coupling packaging of this module. The use of an open packaging structure further reduces the process cost and process difficulty. In fact, the existing data center environment is in good condition, and the temperature and humidity are controllable and relatively stable. Even if an open packaging structure is used, it will not affect the optical communication effect. On the contrary, the use of a sealed packaging form will cause a significant increase in the process cost.

[0037] Optionally, the wavelength division multiplexer is bonded to the bottom plate 5 via the substrate 11 .

[0038] In this embodiment, the substrate 11 is used to position the wavelength division multiplexer, and the wavelength division multiplexer is fixed by bonding the substrate 11 to the bottom plate 5. The connection method is simple and reliable, and no other fixing parts are introduced, thereby ensuring the compactness of the overall structure.

[0039] Optionally, the isolator 3 includes a light-transmitting surface and a light-blocking surface opposite to the light-transmitting surface, the light-transmitting surface of the isolator 3 is bonded to the second side 112, and the light-blocking surface is provided with an anti-reflection film.

[0040] In this embodiment, an anti-reflection film is attached to the light-grouping surface of the isolator 3 to ensure the isolator 3's blocking effect on other light beams. At the same time, the light-transmitting surface of the isolator 3 is bonded to the second side 112 of the substrate 11. The bonding form is stable and does not require other fixing parts, thereby ensuring the compactness of the overall structure.

[0041] Optionally, the light emitting assembly further includes a collimator 6 , which is disposed on the base plate 5 , and the light beam passing through the isolator 3 can enter the collimator 6 .

[0042] In this embodiment, the collimator 6 is arranged opposite to the isolator 3 and is arranged on the bottom plate 5. Specifically, the light beam emitted from the isolator 3 can enter the collimator 6. The collimator 6 is used to converge the parallel light beams emitted from the isolator 3 and continue to enter other structures, thereby improving the coupling efficiency of light and ensuring that the optical signal can be received with maximum efficiency.

[0043] Furthermore, the collimator 6 includes a capillary 61 , a lens 62 and a glass tube 63 sleeved on the outer periphery of the capillary 61 . The lens 62 is arranged opposite to the isolator 3 , and the light beam passing through the isolator 3 passes through the lens 62 and the capillary 61 in sequence.

[0044] Specifically, the light beam emitted from the isolator 3 first enters the lens 62, and the lens 62 converges the parallel light beams. An optical fiber 72 is inserted inside the capillary 61, and the parallel light beams converged by the lens 62 enter the optical fiber 72. Based on the total reflection principle of the optical fiber 72, the light beam entering the optical fiber 72 is selectively transmitted. Further, a glass tube 63 is set on the capillary 61, and the glass tube 63 provides a protective layer for the entire collimator 6 to protect the internal structure from damage by the external environment, such as dust and moisture; at the same time, the glass tube 63 can also play a supporting role to ensure the stability and accuracy of the collimator 6.

[0045] Optionally, the light emitting assembly further includes an adapter assembly 7, which is connected to the collimator 6, and the light beam passing through the collimator 6 can enter the adapter assembly 7. The adapter assembly 7 includes an adapter 71 and an optical fiber 72 plugged into the collimator 6, and the adapter 71 is connected to an end of the optical fiber 72 away from the collimator 6.

[0046] In this embodiment, the adapter 71 is used to transmit the optical signal to another optical module. The collimator 6 converges the parallel light beams emitted from the isolator 3 and enters the optical fiber 72. The optical fiber 72 is used as a transmission medium for the optical signal and has a certain flexibility. At the same time, the length can be adaptively adjusted according to the transmission distance.

[0047] Optionally, the light emitting assembly further includes a filter 4 , which is attached to the first side 111 and arranged in one-to-one correspondence with the laser 2 .

[0048] In this embodiment, each laser 2 corresponds to a filter 4, that is, the light beam emitted from the laser 2 is directly incident on the corresponding filter 4, and the filter 4 selectively transmits or blocks the light beam of a specific frequency or wavelength of the emitted light beam of the laser 2, thereby achieving separation, selection and adjustment of the light wave.

[0049] Furthermore, a collimating lens 8 is provided on the optical path between the filter 4 and the laser 2 .

[0050] In this embodiment, the collimating lens 8 can improve the uniformity and directionality of the light beam, so that the light beam can maintain good parallelism and stability during transmission. The collimating lens 8 improves the output efficiency of the laser 2, reduces energy loss, and ensures that the light beam can be correctly transmitted and focused in the subsequent optical system.

[0051] The second aspect of this embodiment also relates to an optical module, specifically comprising an optical receiving component and the above optical transmitting component, through which the optical receiving component can receive an optical signal from the optical transmitting component. In this embodiment, a conventional optical receiving component can be used.

[0052] The optical module of the present embodiment is based on the optical transmission component, which can effectively reduce the cost of the module.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A light emitting component, characterized in that: include: A wavelength division multiplexing structure (1), the wavelength division multiplexing structure (1) comprising a substrate (11) and a wavelength division multiplexer arranged on the substrate (11), the substrate (11) having a first side (111) and a second side (112) arranged opposite to each other; Lasers (2), with multiple groups of the lasers (2) being arranged close to the first side (111); An isolator (3) is arranged on the second side (112); the light beams of different wavelengths emitted by the plurality of groups of lasers (2) can be combined into a single light beam through the wavelength division multiplexer and pass through the isolator (3); A base plate (5), the wavelength division multiplexing structure (1) being fixed on the base plate (5).

2. The light emitting assembly according to claim 1, characterized in that: The light emitting assembly further comprises a collimator (6), wherein the collimator (6) is arranged on the base plate (5), and the light beam passing through the isolator (3) can enter the collimator (6).

3. The light emitting assembly according to claim 2, characterized in that: The collimator (6) comprises a capillary (61), a lens (62) and a glass tube (63) sleeved on the outer periphery of the capillary (61); the lens (62) is arranged opposite to the isolator (3); and a light beam passing through the isolator (3) passes through the lens (62) and the capillary (61) in sequence.

4. The light emitting assembly according to claim 2, characterized in that: The light emitting component further comprises an adapter component (7), wherein the adapter component (7) is connected to the collimator (6), and the light beam passing through the collimator (6) can enter the adapter component (7).

5. The light emitting assembly according to claim 4, characterized in that: The adapter assembly (7) comprises an adapter (71) and an optical fiber (72) plugged into the collimator (6); the adapter (71) is connected to an end of the optical fiber (72) away from the collimator (6).

6. The light emitting assembly according to claim 1, characterized in that: The isolator (3) comprises a light-transmitting surface and a light-blocking surface opposite to the light-transmitting surface. The isolator (3) is bonded to the second side (112) via the light-transmitting surface, and the light-blocking surface is provided with an anti-reflection film.

7. The light emitting assembly according to claim 1, characterized in that: The light emitting component further comprises a filter (4), wherein the filter (4) is attached to the first side (111) and is arranged in one-to-one correspondence with the laser (2).

8. The light emitting assembly according to claim 7, characterized in that: A collimating lens (8) is provided on the optical path between the filter (4) and the laser (2).

9. The light emitting assembly according to claim 1, characterized in that: The wavelength division multiplexer is bonded to the bottom plate (5) via the substrate (11).

10. An optical module, characterized in that: It comprises a light receiving component and the light transmitting component according to any one of claims 1 to 9, wherein the light receiving component is used to receive an optical signal from the light transmitting component.

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