CN214845915U - Optical module and optical module shell - Google Patents

Abstract

The utility model relates to an optical module and optical module shell, optical module shell include base, upper cover, and the upper end of base is equipped with the cavity, and the device apron is fixed on the upper end accent of cavity, forms the device installation cavity, and a chamber wall of device installation cavity is equipped with the adapter mounting hole that is used for supplying the adapter head end to stretch into, and another chamber wall of device installation cavity is equipped with the PCB board mounting hole that is used for supplying the circuit board to stretch into. The optical module comprises a circuit board, a light emitting assembly, a light receiving assembly and an optical module shell, wherein the light emitting assembly and the light receiving assembly are respectively fixed in a device mounting cavity of the base, the circuit board extends into the device mounting cavity from a PCB mounting hole in the wall of the device mounting cavity, and the head ends of the transmitting end adapter and the receiving end adapter are respectively matched in adapter mounting holes in the wall of the device mounting cavity. The utility model discloses reduced the cost of optical module, improved the radiating effect greatly, saved the space, the space of light, electrical components and parts overall arrangement is bigger, more convenient, has reduced the technology degree of difficulty.

Description

Optical module and optical module shell

Technical Field

The utility model belongs to the technical field of the optical communication, concretely relates to optical module and optical module shell.

Background

With the gradual update of 5G communication technology, the market demands for high-speed modules such as 25G, 100G, 200G, 400G and the like are increased, the market competition is intensified, and the requirements on cost control and reliability of the high-speed modules are increased;

as shown in fig. 1, a conventional optical module includes a module housing, a PCB, a device housing, and an optoelectronic device attached to the device housing. The module shell and the device shell are mutually independent elements, the photoelectric element is attached in the device shell, and then the device shell is sealed in a parallel sealing welding mode or by glue.

The traditional optical module shell and the device shell are independent elements, and have the following defects:

the module shell and the device shell are mutually independent elements, a device shell is additionally needed besides the module shell, and the additional device shell increases the cost of the product, so the cost is relatively high;

the elements in the device shell can generate heat, and the heat generated by the device is dissipated through the heat conducting pad between the device shell and the module shell, so that the heat dissipation effect is poor;

because an additional device shell needs to be used, the space inside the module can be occupied, so that the space for arranging circuit elements in the module and arranging photoelectric elements in the device shell is insufficient, and the product design and the process difficulty are increased.

In recent years, COB (direct attachment of components to PCB boards) and non-hermetic packaging technologies have been rapidly developed. The application environment of the optical module in the data center is greatly improved, the requirement on the air tightness of the device is greatly reduced, and much more, lower packaging cost is pursued. Many optical module manufacturers have therefore made many attempts to lower the cost of packaging, such as replacing the conventional hermetically sealed housing with a powder metallurgy device housing to further reduce the cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide an optical module and optical module shell, reduced the cost of optical module, improved the radiating effect greatly, saved the space, the space of light, electrical components and parts overall arrangement is bigger, more convenient, has also reduced the technology degree of difficulty simultaneously.

The technical scheme of the utility model is realized like this: the utility model discloses an optical module shell, including base and upper cover, still include the device apron, the upper end of base is equipped with the cavity, the device apron is fixed on the upper end accent of cavity, forms the device installation cavity, one side chamber wall of device installation cavity is equipped with the adapter mounting hole that is used for supplying the adapter head end to stretch into, the opposite side chamber wall of device installation cavity is equipped with the PCB board mounting hole that is used for the power supply circuit board to stretch into.

Furthermore, two independent concave cavities are arranged at the upper end of the base, two device installation cavities are respectively formed and are used for respectively installing the light emitting component and the light receiving component, or a partition wall is arranged in the concave cavity at the upper end of the base and is used for dividing the concave cavity at the upper end of the base into two device installation cavities for respectively installing the light emitting component and the light receiving component, wherein, the adapter mounting hole that the first device installation cavity in two device installation cavities set up and is used for supplying the transmitting terminal adapter head end to stretch into, another chamber wall in first device installation cavity is equipped with the PCB board mounting hole that is used for the power supply circuit board to stretch into, the adapter mounting hole that the second device installation cavity in two device installation cavities set up and is used for supplying the receiving terminal adapter head end to stretch into, another chamber wall in second device installation cavity is equipped with the PCB board mounting hole that is used for the power supply circuit board to stretch into.

Furthermore, a device installation cavity is arranged at the upper end of the base and used for installing the light emitting assembly and the light receiving assembly.

Furthermore, an adapter clamping groove for respectively mounting the transmitting end adapter and the receiving end adapter is formed in one end, located in the device mounting cavity, of the upper end of the base, the adapter clamping groove penetrates through the cavity wall on one side of the cavity in the upper end of the base, and the adapter clamping groove in the upper end of the cavity wall of the cavity is in butt joint with the adapter clamping groove formed in the lower end of the device cover plate to form an adapter mounting hole; the other end of the upper end of the base, which is positioned in the device mounting cavity, is provided with a cavity for mounting a circuit board; the cavity is provided with an opening for the gold finger end of the circuit board to extend out.

The utility model discloses an optical module, including circuit board, light emission subassembly, light receiving component, still include as above the optical module shell, light emission subassembly, light receiving component fix respectively in the device installation cavity of base, the one end of circuit board stretches into from the PCB board mounting hole on the chamber wall of device installation cavity in the device installation cavity, be connected with light emission subassembly, light receiving component electricity respectively, the head end of transmitting end adapter, the head end of receiving end adapter cooperate respectively in the adapter mounting hole on the chamber wall of device installation cavity.

Further, glue is used for sealing between the circuit board and the PCB mounting hole on the cavity wall of the device mounting cavity, and glue is used for sealing between the transmitting end adapter and the receiving end adapter and the adapter mounting hole on the cavity wall of the device mounting cavity; and the device cover plate and the upper end cavity opening of the concave cavity are sealed by glue to form a closed cavity.

Further, the light emitting assembly comprises at least one laser for outputting laser light into the optical fiber of the transmitting end adapter; the optical receiving component comprises at least one PD, and the receiving end adapter is used for receiving optical signals and outputting the optical signals to the PD.

Further, a first lens is arranged on a light path between the laser and the transmitting end adapter.

Further, the laser is fixed at the upper end of the TEC; the TEC is fixed on the bottom surface of the concave cavity of the base.

Furthermore, a first prism is arranged on a light path between the laser and the transmitting end adapter, and a prism clamping groove for mounting the first prism is formed in the base.

Further, a second prism is arranged on a light path between the receiving end adapter and the PD, and is used for converting the optical signal received by the receiving end adapter and outputting the converted optical signal to the PD; and a second lens is arranged on the light path between the receiving end adapter and the PD.

The utility model discloses following beneficial effect has at least:

the utility model provides a structural scheme of module shell with device casing integration is equipped with the cavity in the upper end of base, the upper end accent of cavity is fixed with the device apron, forms the device installation cavity, directly does the device casing on module shell, has saved extra device casing, has reduced the cost of optical module.

The utility model inserts the PCB board into the device installation cavity through the rectangular hole reserved on the inner cavity wall and fixes the PCB board with glue; inserting the adapter into the device mounting cavity and fixing the adapter with glue; covering the device cover plate on the cavity and sealing the device cover plate by using glue to form a closed cavity; the laser, the TEC, the photoelectric element and the like are directly attached to the cavity of the module shell, and heat generated by the laser and the TEC is directly conducted to the module shell, so that the problem of heat dissipation of the traditional optical module is solved.

The device shell is directly arranged on the module shell, so that an additional device shell is omitted, and the problem of insufficient space layout of the traditional scheme is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an overall view of an optical module provided in an embodiment of the present invention;

fig. 2 is a schematic diagram of a base with a device cover plate of an optical module according to an embodiment of the present invention;

fig. 3 is a schematic view of a base of an optical module provided by the present invention without a device cover plate;

fig. 4 is a partially enlarged view of fig. 3.

In the attached drawing, 1 is a base, 1-1 is a first device mounting cavity, 1-2 is a second device mounting cavity, 1-3 is an adapter clamping groove, 1-4 is a PCB mounting hole, 2 is a device cover plate, 3 is an upper cover, 4 is a circuit board, 5 is a laser, 6 is a first lens, 7 is a TEC, 8 is a first prism, 9 is an emission end adapter, 10 is a receiving end adapter, 11 is a second lens, 12 is a second prism, and 13 is a PD.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.

Example one

Referring to fig. 1 to 4, the embodiment of the utility model provides an optical module shell, including base 1 and upper cover 3, still include device apron 2, the upper end of base 1 is equipped with the cavity, device apron 2 is fixed on the upper end accent of cavity, forms inclosed device installation cavity, a chamber wall of device installation cavity is equipped with the adapter mounting hole that is used for supplying the adapter head end to stretch into, another chamber wall of device installation cavity is equipped with and is used for the PCB board mounting hole 1-4 that circuit board 4 stretched into.

Further, the first scheme is as follows: the upper end of the base 1 is provided with two independent concave cavities which respectively form two device installation cavities for respectively installing a light emitting component and a light receiving component.

Further, the second scheme is as follows: the cavity at the upper end of the base 1 is internally provided with a partition wall for dividing the cavity at the upper end of the base 1 into two device installation cavities for respectively installing the light emitting assembly and the light receiving assembly.

Furthermore, one cavity wall of a first device installation cavity 1-1 in the two device installation cavities is provided with an adapter installation hole for the head end of a transmitting end adapter 9 to extend into, the other cavity wall of the first device installation cavity 1-1 is provided with a PCB installation hole 1-4 for the head end of a circuit board 4 to extend into, one cavity wall of a second device installation cavity 1-2 in the two device installation cavities is provided with an adapter installation hole for the head end of a receiving end adapter 10 to extend into, and the other cavity wall of the second device installation cavity 1-2 is provided with a PCB installation hole 1-4 for the circuit board 4 to extend into. The two device mounting cavities are more suitable for one light emitting channel and one light receiving channel.

Further, the third scheme is as follows: the utility model discloses also can all place light emission subassembly, light receiving module in a device installation cavity.

Further, the fourth scheme is as follows: the utility model discloses can also only set up a device installation cavity that is used for installing light emission component, then form the inner chamber that is used for installing circuit board 4, light receiving component between base 1 and upper cover 3, this structure more is applicable to multichannel light emission passageway and multichannel light receiving channel.

Furthermore, one end of the upper end of the base 1, which is positioned in the device installation cavity, is provided with an adapter card slot 1-3 for respectively installing a transmitting end adapter 9 and a receiving end adapter 10, the adapter card slot 1-3 penetrates through the cavity wall at one side of the cavity at the upper end of the base 1, and the adapter card slot 1-3 at the upper end of the cavity wall of the cavity is butted with the adapter card slot 1-3 at the lower end of the device cover plate 2 to form an adapter installation hole; the other end of the upper end of the base 1, which is positioned in the device mounting cavity, is provided with a cavity for mounting a circuit board 4; the cavity is provided with an opening for the end of the golden finger of the circuit board 4 to extend out.

The outer walls of the two sides of the base 1 are provided with a stopping groove for embedding the side walls of the two sides of the upper cover 3.

The base 1 is fixedly connected with the upper cover 3 through screws.

Example two

Referring to fig. 1 to 4, the embodiment of the utility model discloses an optical module, including circuit board 4, light emission subassembly, light receiving assembly, still include as embodiment one the optical module shell, light emission subassembly, light receiving assembly fix respectively in base 1's device installation cavity, the one end of circuit board 4 stretches into from PCB board mounting hole 1-4 on the chamber wall of device installation cavity in the device installation cavity, be connected with light emission subassembly, light receiving assembly electricity respectively, the other end of circuit board 43 sets up the golden finger. The head end of the transmitting end adapter 9 and the head end of the receiving end adapter 10 are respectively matched in adapter mounting holes on the cavity wall of the device mounting cavity.

Further, the circuit board 4 and the PCB mounting holes 1-4 on the cavity wall of the device mounting cavity are sealed by glue, and the transmitting end adapter 9, the receiving end adapter 10 and the adapter mounting holes on the cavity wall of the device mounting cavity are sealed by glue; and the device cover plate 2 and the upper end cavity opening of the concave cavity are sealed by glue to form a closed cavity.

Further, the optical transmission assembly comprises at least one laser 5, and when the laser 5 is one, that is, the optical transmission channel is one path, the laser 5 is used for outputting laser light into an optical fiber of the transmitting end adapter 9; the optical receiving component includes at least one PD (i.e., a photodiode) 13, and when the PD is one, i.e., the optical receiving channel is one, the receiving-end adapter 10 is configured to receive an optical signal and output the optical signal to the PD 13. The PD13 (photodiode) is electrically connected to TIA (transimpedance amplifier) on the circuit board 4.

Further, a first lens 6 is arranged on the optical path between the laser 5 and the transmitting end adapter 9.

Further, a laser 5 is fixed to an upper end of a TEC (semiconductor cooler) 7; the TEC7 is fixed on the bottom surface of the cavity of the base 1. The first lens 6 is also fixed to the upper end of the TEC 7.

Further, a first prism 8 is arranged on a light path between the laser 5 and the transmitting end adapter 9, and a prism clamping groove for mounting the first prism 8 is formed in the base 1. The first prism 8 of this embodiment is located between the emitter end adapter 9 and the first lens 6. The light rays incident on the first prism 8 are displaced laterally without changing the direction of propagation.

Further, a second prism 12 is arranged on a light path between the receiving end adapter 10 and the PD13, and is used for converting the optical signal received by the receiving end adapter 10 and outputting the converted optical signal to the PD 13; a second lens 11 is disposed on the optical path between the receiving-end adapter 10 and the PD 13. The second lens 11 of the present embodiment is located between the receiving-end adapter 10 and the second prism 12.

Further, when the lasers 5 are multiple, that is, the optical transmission channels are multiple, an optical multiplexer is arranged between the multiple lasers 5 and the transmitting end adapter 9, and the optical Multiplexer (MUX) is used for multiplexing the laser output by the multiple lasers 5 and outputting the multiplexed laser to the optical fiber of the transmitting end adapter 9. A plurality of third lenses are arranged between the optical multiplexer and the plurality of lasers 5, and the plurality of third lenses correspond to the plurality of lasers 5 one by one; the third lens is fixed at the upper end of the TEC 7. A fourth lens is arranged between the transmitting end adapter 9 and the optical multiplexer, corresponds to the head end of the transmitting end adapter 9, and is used for transmitting light beams between the transmitting end adapter 9 and the optical multiplexer; a third prism is arranged between the transmitting end adapter 9 and the optical multiplexer, and light rays enter the third prism to generate lateral displacement without changing the propagation direction; the third prism is located between the lens and the optical multiplexer.

Further, when the PD13 is multiple, that is, the optical receiving channels are multiple, a demultiplexer is disposed between the multiple PDs 13 and the receiving end adapter 10, the receiving end adapter 10 is configured to receive the optical signal of the optical fiber and transmit the optical signal into the demultiplexer, and the Demultiplexer (DEMUX) is configured to separate the multiple wavelengths and correspondingly output the separated multiple wavelengths to the multiple PDs 13, respectively. At this time, the head end of the receiving-end adapter 10 is connected to the demultiplexer through the optical fiber assembly, and the input optical signal of the receiving-end adapter 10 enters the corresponding PD13 after being split by the demultiplexer through the optical fiber assembly. At this time, the light receiving member may be disposed not in the device mounting cavity but in the cavity formed between the base 1 and the upper cover 3.

Further, the demultiplexer is fixed on a demultiplexer mounting boss arranged at the upper end of the base 1. Of course, it is also possible to fix the demultiplexer on the circuit board 4.

Further, the transmitting end adapter 9 is arranged side by side with the receiving end adapter 10.

The utility model adopts the structure that the module shell and the device shell are integrated, the device shell is directly processed on the module shell, no independent device shell is provided, the additional device shell is saved, and the cost of the optical module is reduced; heating elements such as the laser 5 and the TEC7 are directly bonded and fixed on the module shell, and the generated heat is directly conducted to the module shell, so that the heat dissipation effect is greatly improved; because no extra device shell is needed, the space is saved, the space for the layout of the optical and electric components is larger and more convenient, and the process difficulty is reduced.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An optical module shell, includes base and upper cover, its characterized in that: still include the device apron, the upper end of base is equipped with the cavity, the device apron is fixed on the upper end accent of cavity, forms the device installation cavity, one side chamber wall of device installation cavity is equipped with the adapter mounting hole that is used for supplying the adapter head end to stretch into, the opposite side chamber wall of device installation cavity is equipped with the PCB board mounting hole that is used for supplying the circuit board to stretch into.

2. The light module housing of claim 1, wherein: the base upper end sets up two independent cavities, forms two device installation chambeies respectively for install light emission subassembly, light receiving component respectively, perhaps, be equipped with the division wall in the cavity of base upper end, be used for separating the cavity of base upper end for two device installation chambeies, be used for installing light emission subassembly, light receiving component respectively, wherein, the adapter mounting hole that is used for supplying the transmission end adapter head end to stretch into is set up to a chamber wall of the first device installation chamber in two device installation chambeies, another chamber wall of first device installation chamber is equipped with the PCB board mounting hole that is used for the circuit board to stretch into, the adapter mounting hole that is used for supplying the receiving end adapter head end to stretch into is set up to a chamber wall of the second device installation chamber in two device installation chambers, another chamber wall of second device installation chamber is equipped with the PCB board mounting hole that is used for the circuit board to stretch into.

3. The light module housing of claim 1, wherein: the upper end of the base is provided with a device installation cavity for installing the light emitting assembly and the light receiving assembly.

4. The light module housing of claim 1, wherein: an adapter clamping groove for respectively mounting a transmitting end adapter and a receiving end adapter is formed in one end, located in the device mounting cavity, of the upper end of the base, the adapter clamping groove penetrates through the cavity wall on one side of the cavity in the upper end of the base, and the adapter clamping groove in the upper end of the cavity wall of the cavity is in butt joint with the adapter clamping groove in the lower end of the device cover plate to form an adapter mounting hole; the other end of the upper end of the base, which is positioned in the device mounting cavity, is provided with a cavity for mounting a circuit board; the cavity is provided with an opening for the gold finger end of the circuit board to extend out.

5. An optical module, includes circuit board, light emission subassembly, light receiving component, its characterized in that: the optical module shell as claimed in any one of claims 1 to 4, wherein the light emitting module and the light receiving module are respectively fixed in the device mounting cavity of the base, one end of the circuit board extends into the device mounting cavity from a PCB mounting hole on the cavity wall of the device mounting cavity and is respectively electrically connected with the light emitting module and the light receiving module, and the head end of the transmitting end adapter and the head end of the receiving end adapter are respectively matched in the adapter mounting holes on the cavity wall of the device mounting cavity.

6. The optical module of claim 5, wherein: the PCB and the PCB mounting hole on the cavity wall of the device mounting cavity are sealed by glue, and the transmitting end adapter, the receiving end adapter and the adapter mounting hole on the cavity wall of the device mounting cavity are sealed by glue; and the device cover plate and the upper end cavity opening of the concave cavity are sealed by glue to form a closed cavity.

7. The optical module of claim 5, wherein: the optical transmitting assembly comprises at least one laser, and the laser is used for outputting laser light into an optical fiber of a transmitting end adapter; the optical receiving component comprises at least one PD, and the receiving end adapter is used for receiving optical signals and outputting the optical signals to the PD.

8. The optical module of claim 7, wherein: a first lens is arranged on a light path between the laser and the transmitting end adapter; and a first prism is arranged on a light path between the laser and the transmitting end adapter, and a prism clamping groove for mounting the first prism is arranged on the base.

9. The optical module of claim 7, wherein: the laser is fixed at the upper end of the TEC; the TEC is fixed on the bottom surface of the concave cavity of the base.

10. The optical module of claim 7, wherein: a second prism is arranged on a light path between the receiving end adapter and the PD and used for converting the optical signal received by the receiving end adapter and outputting the converted optical signal to the PD; and a second lens is arranged on the light path between the receiving end adapter and the PD.

Images