BOX shell and optical device

Abstract

The utility model belongs to the field of optical devices, and particularly relates to a BOX shell and an optical device. Comprising a shell body, the shell body comprises an optical fiber mounting part, and the optical fiber mounting part is used for mounting an optical fiber adapter; and the height of the optical fiber installer is higher than that of other parts of the shell body. The utility model provides a BOX housing and an optical device, and aims to solve the problem that a conventional optical device housing is liable to interfere with other components.

Description

Technical Field

[0001] The utility model belongs to the field of optical devices, and particularly relates to a BOX housing and an optical device. Background Art

[0002] An optical device is an optoelectronic device that converts an electrical signal into an optical signal or an optical signal into an electrical signal in an optical communication system. The optical device housing is a part of the optical device, and the optical device housing is used for installing a signal transmitting module and a signal receiving module.

[0003] According to different types of optical devices, the types of optical device housings are also different. In a three-transmitter and three-receiver optical device, since a conventional three-transmitter and three-receiver optical device adopts a BOX package + TO package, the housing of the optical device is usually in a box-like shape. For example, the optical device housing disclosed in the patent application with the application number CN202121799889.6 and the title of "A Miniaturized Three-Transmitter and Three-Receiver Optical Component".

[0004] However, with the progress of technology, the integration requirements of optical communication systems are getting higher and higher, and the number of related devices in optical communication systems is also increasing. Therefore, conventional optical devices often have problems of interference with other components. Summary of the Utility Model

[0005] The utility model provides a BOX housing and an optical device, aiming to solve the problem that the housing of a conventional optical device is prone to interference with other components.

[0006] To achieve the above purpose, the utility model provides a BOX housing, including a housing body, and the housing body includes an optical fiber installation part for installing an optical fiber adapter.

[0007] Other parts of the housing body are set lower than the optical fiber installation part.

[0008] In this solution, the housing body is provided with an optical fiber installation part to ensure that the optical device can be installed with the optical fiber adapter. Then, other parts of the optical device are set lower than the height of the optical fiber installation part, so a receiving space can be formed at the top of the optical device. When the optical device is installed and used, the components that are prone to interference can directly extend into the receiving space at the top of the optical device, solving the problem of interference between the optical device and other components. At the same time, since other components can be placed in the receiving space, the integration degree of the entire system can be higher.

[0009] Preferably, in order to reduce the height of the entire optical device housing, the height of the optical fiber installation part in this solution is adapted to the height of the optical fiber adapter.

[0010] In this solution, the height of the optical fiber installation part is set to be adapted to the height of the optical fiber adapter, which ensures that while the optical fiber adapter is installed, the height of the optical device housing can also be lower. Obviously, when the height of the optical device housing is lower, it further meets the integration requirements of the optical communication system.

[0011] Preferably, for the installation of internal parts, the BOX housing in this solution includes a base and a cover. An accommodation cavity is constructed inside the base, and the cover is installed at the opening of the accommodation cavity, and the cover is used to close the accommodation cavity.

[0012] In this solution, an accommodation cavity is constructed inside the base, and the accommodation cavity can be used for installing parts to assemble and form an optical device. At the same time, when the cover closes the accommodation cavity, a sealed environment is formed in the accommodation cavity, solving the problem that the internal parts of the accommodation cavity are interfered by the outside world.

[0013] Preferably, when installing the cover onto the base, usually the method of sealing welding is used. And to ensure that during welding, the sealing welding tool will not collide with the optical fiber installation part. An accommodation groove is provided between the optical fiber installation part and the cover in this solution.

[0014] In this solution, due to the provision of the accommodation groove. When the sealing welding tool installs the cover onto the base, therefore, the accommodation groove can allow the sealing welding tool to avoid the optical fiber installation part, preventing the optical fiber installation part from colliding with the sealing welding tool and avoiding damage to the optical fiber installation part or the sealing welding tool.

[0015] Preferably, to ensure that optical signals can be transmitted between the signal adapter and the inside of the accommodation cavity, the accommodation cavity and the optical fiber installation part are communicated through a connection cavity, and the connection cavity is used to accommodate a collimating prism.

[0016] In this solution, the optical fiber installation part and the accommodation cavity are communicated by setting a connection cavity to ensure the transmission of optical signals. At the same time, a collimating lens is provided in the connection cavity to ensure that the optical signal can convert the divergent light into parallel light.

[0017] Preferably, to ensure the transmission of optical signals and avoid the optical signals being blocked by the side wall of the accommodation cavity. A light window is provided at the connection between the accommodation cavity and the connection cavity in this solution.

[0018] In this solution, a light window is provided to communicate the accommodation cavity and the connection cavity, ensuring that the optical signal can be conducted from the accommodation cavity to the connection cavity, and then the optical signal can be transmitted from the connection cavity to the optical fiber adapter.

[0019] Preferably, for installing the signal transmitting module and the signal receiving module into the accommodation cavity, the accommodation cavity in this solution includes a first accommodation part, and the first accommodation part is used to accommodate the signal transmitting module and the signal receiving module.

[0020] In this solution, by providing a first accommodating part, the signal transmitting module and the signal receiving module can be installed in the first accommodating part, ensuring that the optical device has the functions of signal transmission and signal reception.

[0021] Preferably, when the signal transmitting module and the signal receiving module are installed inside the first accommodating part, in order to solve the crosstalk between the signal transmitting module and the signal receiving module, a separating component is provided inside the first accommodating part in this solution.

[0022] In this solution, the signal transmitting module and the signal receiving module are separated by providing a separating component, thereby reducing the crosstalk between the signal transmitting module and the signal receiving module.

[0023] Preferably, the accommodating cavity includes a second accommodating part, the second accommodating part is arranged higher than the first accommodating part, and the second accommodating part is used to accommodate the wavelength division multiplexer.

[0024] The second aspect of the present utility model provides an optical device, which includes an optical fiber adapter and the above-mentioned BOX housing, and the optical fiber adapter is installed on the optical fiber installation part of the BOX housing.

[0025] The beneficial effect of the present utility model is as follows: In this solution, the housing body is provided with an optical fiber installation part, ensuring that the optical device can be installed with the optical fiber adapter. Then, other parts of the optical device are set to be lower than the height of the optical fiber installation part, so a accommodating space can be formed at the top of the optical device. When the optical device is installed and used, the components that are prone to interference can directly extend into the accommodating space at the top of the optical device, solving the problem of interference between the optical device and other components. At the same time, since other components can be placed in the accommodating space, the integration degree of the entire system can be higher. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the BOX housing in Embodiment 1.

[0027] Figure 2 It is a top view of the BOX housing in Embodiment 1.

[0028] Figure 3 It is a schematic structural diagram of the BOX housing in Embodiment 2.

[0029] Figure 4 It is a side view of the BOX housing in Embodiment 2.

[0030] Figure 5 It is a schematic diagram of the BOX housing with the cover removed in Embodiment 2.

[0031] Figure 6 It is a top view of the optical device.

[0032] Figure 7 It is a schematic diagram of the optical device transmitting a signal.

[0033] Figure 8 Schematic diagram of a received signal by an optical device.

[0034] Reference numerals include: housing body 1, base 11, accommodation cavity 111, first mounting portion 111a, second mounting portion 111b, partitioning member 111c, cover 12, optical fiber mounting portion 13, accommodation groove 14, connection cavity 15, optical window 16, signal transmitting module 2, first signal transmitting end 21, second signal transmitting end 22, third signal transmitting end 23, collimating lens 24, isolator 25, beam combiner 26, signal receiving module 3, first signal receiving end 31, second signal receiving end 32, third signal receiving end 33, coupling lens 34, right-angle prism 35, filter 36, wavelength division multiplexer 4, fiber optic adapter 5, Fiber collimating lens 6. Specific embodiments

[0035] In order to make the objectives, technical solutions and advantages of the embodiments clearer, the following further describes the present invention in detail with reference to the drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0036] It should be noted that all actions of obtaining signals, information or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and obtaining authorization from the owner of the corresponding device.

[0037] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the own contour of the corresponding component parts. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another element and do not have sequentiality and importance.

[0038] Embodiment 1

[0039] Basically as shown in the attached Figure 1As shown in the figure, a BOX housing includes a housing body 1, and the housing body 1 includes a base 11 and a cover 12. The base 11 is generally rectangular or irregular in shape, and is preferably made of a high thermal conductivity heat dissipation material, such as tungsten copper. The interior of the base 11 is configured with a rectangular accommodation cavity 111. The interior of the accommodation cavity 111 can be used for installing components such as a signal transmission module 2, a signal reception module 3, and a wavelength division multiplexer 4. The cover 12 is in the shape of a rectangular plate, and the cover 12 can be installed on the base 11 by means of installation techniques such as sealing welding in the prior art, so as to completely enclose the accommodation cavity 111, making an airtight environment formed inside the accommodation cavity 111.

[0040] In the embodiment of the present disclosure, when the top of the BOX housing is not covered by the cover 12, the top of the BOX housing is open, as Figure 1 shown in the figure. Therefore, when manufacturing optical devices, automated equipment can automatically install relevant components (such as lenses and Z-blocks, etc.) inside the BOX housing, with high installation efficiency. At the same time, when the automated equipment uniformly installs the components inside the BOX housing, the installation accuracy and coupling accuracy of the components are higher. After all the components are installed, the cover 12 is then installed on the BOX housing.

[0041] In the embodiment of the present disclosure, the cover 12 is preferably set to be dark black, or an absorbent coating is provided on the cover 12, etc. The dark black cover 12 or the absorbent coating is used to reduce the optical crosstalk inside the accommodation cavity 111.

[0042] As Figure 1 shown in the figure, the interior of the accommodation cavity 111 in the embodiment of the present disclosure includes a first installation part 111a and a second installation part 111b, and the first installation part 111a and the second installation part 111b are arranged in a stepped manner. That is, the second installation part 111b is higher than the first installation part 111a. The first installation part 111a is used for installing the signal transmission module 2 and the signal reception module 3. The second installation part 111b is used for installing the wavelength division multiplexer 4. Since the signal transmission module 2 and the signal reception module 3 usually occupy a relatively large position, the first installation part 111a and the second installation part 111b are arranged in a stepped manner, and the first installation part 111a can be used for installing the signal transmission module 2 and the signal reception module 3 that require a larger position. And after the signal transmission module 2 and the signal reception module 3 are installed in the first installation part 111a, the optical signals of the signal transmission module 2, the signal reception module 3, and the wavelength division multiplexer 4 are in the same plane state.

[0043] Since the first installation part 111a is for installing the signal transmission module 2 and the signal reception module 3, in order to solve the problem of mutual interference between the signal transmission module 2 and the signal reception module 3, a partition member 111c is provided on the first installation part 111a, as Figure 1and Figure 2 As shown in Figure 2 , the separating member 111c is a separator plate. The separator plate is vertically arranged. The signal transmitting module 2 and the signal receiving module 3 can be respectively installed on the left and right sides of the separating member 111c, thus solving the problem of mutual interference between the signal transmitting module 2 and the signal receiving module 3.

[0044] In order to facilitate the installation of the fiber optic adapter 5 on the BOX housing, in the embodiment of the present disclosure, a fiber optic installation portion 13 is provided at the end of the base 11. The fiber optic installation portion 13 is plate-shaped, as Figure 1 and Figure 2 shown. The height of the fiber optic installation portion 13 matches the height of the fiber optic adapter 5, ensuring that the fiber optic adapter 5 can be installed.

[0045] In the embodiment of the present disclosure, the height of the fiber optic installation portion 13 is higher than other parts of the housing body 1, as Figure 1 shown, so that a receiving space is formed at other parts of the housing body 1. Therefore, when the optical device using the BOX housing of this embodiment is in use, other components (such as a PCB board) can extend above the BOX housing, thus solving the problem that a conventional BOX housing is prone to interference with other components.

[0046] Embodiment 2

[0047] The difference between the embodiment of the present disclosure and Embodiment 1 is that, as Figures 3 to 5 shown, in the embodiment of the present disclosure, the cover 12 is installed at the mouth of the receiving cavity 111 by means of sealing welding. Therefore, in order to prevent the sealing welding tool from colliding with the fiber optic installation portion 13 during the sealing welding operation. In the embodiment of the present disclosure, a receiving groove 14 is provided between the fiber optic installation portion 13 and the receiving cavity 111. By means of the receiving groove 14, the edge of the cover 12 is exposed. Therefore, when the sealing welding tool performs sealing welding, the sealing welding tool can be received inside the receiving groove 14, thus solving the problem of the sealing welding tool colliding with the fiber optic installation portion 13.

[0048] When a receiving groove 14 is provided between the fiber optic installation portion 13 and the receiving cavity 111, in order to ensure that the fiber optic installation portion 13 can communicate with the inside of the receiving cavity 111. Therefore, in the embodiment of the present disclosure, a connecting cavity 15 is provided between the fiber optic installation portion 13 and the receiving cavity 111, as Figure 5 shown. In order to ensure that the connecting cavity 15 can communicate with the receiving cavity 111, in the embodiment of the present disclosure, an optical window 16 is provided between the connecting cavity 15 and the receiving cavity 111 for communication, as Figure 5 shown, ensuring that the optical signal can enter the inside of the fiber optic adapter 5 through the optical window 16. At the same time, preferably, the Fiber collimating lens 6 is also installed inside the connecting cavity 15, and the optical signal is processed through the Fiber collimating lens 6.

[0049] Since the optical signal is prone to reflection when passing through the optical window 16, in the embodiments of the present disclosure, the optical window 16 is inclined. During implementation, the inner wall of the accommodation cavity 111 can be set as an inclined surface, such as Figure 5 as shown. Therefore, when the optical window 16 is installed on the inner wall of the accommodation cavity 111, the optical window 16 is in an inclined state.

[0050] When installing the optical window 16 on the inner wall of the accommodation cavity 111, it is usually installed by welding. Therefore, the solder during welding is prone to flow downward and then accumulate at the lower part of the optical window 16. To prevent the solder from accumulating at the lower part of the optical window 16, in the embodiments of the present disclosure, a groove is provided at the bottom of the accommodation groove 14, and the groove is located below the optical window 16. When the optical window 16 is welded and installed on the inner wall of the accommodation groove 14, the solder can flow downward and be accommodated in the groove.

[0051] Embodiment 3

[0052] The embodiments of the present disclosure provide an optical device, such as Figure 6 as shown, including the BOX housing of Embodiment 1 or Embodiment 2, a signal transmitting module 2, a signal receiving module 3, an optical fiber adapter 5, and a wavelength division multiplexer 4.

[0053] In the embodiments of the present disclosure, both the signal transmitting module 2 and the signal receiving module 3 are installed inside the accommodation cavity 111. The signal transmitting module 2 includes two or more signal transmitting ends, and the signal receiving module 3 also includes two or more signal receiving ends. The wavelength division multiplexer 4 is also installed inside the accommodation cavity 111 and is arranged corresponding to the signal transmitting module 2 and the signal receiving module 3. The optical fiber adapter 5 is specifically installed on the optical fiber installation part 13 of the BOX housing.

[0054] The following provides an example of an optical device applied in the upgrade process of 50G PON:

[0055] Such as Figure 7 and Figure 8 as shown, the signal transmitting module 2 can specifically include three signal transmitting ends, and the signal receiving module 3 includes three signal receiving ends. The three signal receiving ends and the three signal transmitting ends can respectively adapt to the communication wavelengths of 50G PON, 10G PON, and 2.5G PON. In the embodiments of the present disclosure, three - way transmission and three - way reception of optical signals are achieved through the cooperation of three signal transmitting ends and three signal receiving ends.

[0056] Such as Figure 7As shown, the signal transmitting module 2 specifically includes a first signal transmitting end 21, a second signal transmitting end 22, a third signal transmitting end 23, a collimating lens 24, an isolator 25, and a beam combiner 26. The three signal transmitting ends can be a 1577 laser module, a 1490 laser module, and a 1342 laser module respectively. The 1577 laser module, the 1490 laser module, and the 1342 laser module are each correspondingly configured with a circuit adapted to the laser. There are also three collimating lenses 24, and the three collimating lenses 24 are arranged corresponding to the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 one by one. The collimating lens 24 is used to adjust the light beam into a parallel light beam. At the same time, there are also three isolators 25. The isolator 25 is located at the rear end of the collimating lens 24, and the optical signal emitted from the collimating lens 24 enters the isolator 25. The beam combiner 26 is arranged corresponding to the three isolators 25, and the beam combiner 26 is used to combine the optical signals emitted from the isolator 25. The beam combiner 26 is preferably a PBS.

[0057] As Figure 7 shown, the working process of the signal transmitting module 2 is as follows: The three lasers respectively emit three independent optical signals, and the three optical signals respectively enter the corresponding collimating lenses 24. The collimating lenses 24 convert the light beams into parallel light. The three light beams converted into parallel light are combined by the beam combiner 26. Finally, the combined light beam is emitted from the beam combiner 26.

[0058] Since there is a heat generation problem during the working process of the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23. At the same time, the working power of the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 is easily affected by the ambient temperature. Therefore, the above-mentioned signal transmitting module 2 further includes a thermoelectric cooler (TEC), and the thermoelectric cooler is installed at the bottom of the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 (not shown in the figure). Since the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 are all assembled on the same thermoelectric cooler, during use, the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 can all be locked at a constant temperature by the thermoelectric cooler, and the first signal transmitting end 21, the second signal transmitting end 22, and the third signal transmitting end 23 are less affected by the ambient temperature.

[0059] The wavelength division multiplexer 4 is installed corresponding to the beam combiner 26, as Figure 7 shown. The wavelength division multiplexer 4 includes an IN end and a COM end, and the IN end of the wavelength division multiplexer 4 is arranged corresponding to the beam combiner 26. The optical signal emitted from the beam combiner 26 enters from the IN end of the wavelength division multiplexer 4 and then is emitted from the COM end of the wavelength division multiplexer 4. The wavelength division multiplexer 4 is a wavelength division multiplexer 4 in the prior art.

[0060] To achieve the adaptation between the optical device and the optical fiber, as Figure 6 shown, in the embodiments of the present disclosure, the optical fiber adapter 5 is installed on the optical fiber installation part 13 of the BOX housing, and the optical fiber adapter 5 is arranged corresponding to the COM end of the wavelength division multiplexer 4. After the optical signal is emitted from the COM end of the wavelength division multiplexer 4, the optical signal can enter the optical fiber adapter 5. The optical fiber adapter 5 is used to adapt to the optical fiber. A Fiber collimating lens 6 is arranged corresponding to the optical fiber adapter 5 to convert the divergent light beam output by the optical fiber into parallel light, or to couple the parallel light into the optical fiber.

[0061] It can be understood that when using the BOX housing of Embodiment 1, the Fiber collimating lens 6 is arranged inside the accommodation cavity 111; when using the BOX housing of Embodiment 2, the Fiber collimating lens 6 is arranged inside the connection cavity 15.

[0062] As Figure 8 shown, the signal receiving module 3 specifically includes a first signal receiving end 31, a second signal receiving end 32, a third signal receiving end 33, a coupling lens 34, a right-angle prism 35, and a filter 36. The first signal receiving end 31, the second signal receiving end 32, and the third signal receiving end 33 are all PD detectors, and the first signal receiving end 31, the second signal receiving end 32, and the third signal receiving end 33 are respectively used to adapt to the 50G PON communication wavelength, the 10G PON communication wavelength, and the 2.5G PON communication wavelength. The filter 36 is arranged corresponding to the wavelength division multiplexer 4, and the optical signal emitted from the IN end of the wavelength division multiplexer 4 can directly enter the filter 36. The coupling lens 34 is arranged corresponding to the filter 36, and there are three coupling lenses 34, which are used to adapt to three optical signals respectively. The right-angle prism 35 is arranged corresponding to the three coupling lenses 34. The optical signals emitted from the three coupling lenses 34 can directly enter the right-angle prism 35 and are turned by the right-angle prism 35 into the first signal receiving end 31, the second signal receiving end 32, and the third signal receiving end 33.

[0063] The above are only the embodiments of the present invention, and common knowledge such as specific structures and characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A BOX shell, characterized in that: The housing body comprises a fiber optic mounting portion, wherein the fiber optic mounting portion is used for mounting a fiber optic adapter; Other parts of the housing body are arranged to be lower than the optical fiber installation part.

2. The BOX shell according to claim 1, characterized in that: The height of the optical fiber installation portion matches the height of the optical fiber adapter.

3. The BOX shell according to claim 1, characterized in that: The BOX shell includes a base and a cover. A receiving cavity is configured inside the base. The cover is installed at the mouth of the receiving cavity and is used to close the receiving cavity.

4. The BOX shell according to claim 3, characterized in that: An accommodating groove is arranged between the optical fiber installation portion and the sealing cover.

5. The BOX shell according to claim 3, characterized in that: The accommodating cavity is communicated with the optical fiber installation portion through a connecting cavity, and the connecting cavity is used to accommodate a collimating prism.

6. The BOX shell according to claim 5, characterized in that: A light window is arranged at the connection between the accommodating cavity and the connecting cavity.

7. The BOX shell according to claim 3, characterized in that: The accommodating cavity includes a first accommodating portion, and the first accommodating portion is used to accommodate a signal transmitting module and a signal receiving module.

8. The BOX shell according to claim 7, characterized in that: A partition component is arranged in the first accommodation portion.

9. The BOX shell according to claim 7, characterized in that: The accommodating cavity comprises a second accommodating portion, the second accommodating portion is arranged higher than the first accommodating portion, and the second accommodating portion is used to accommodate the wavelength division multiplexer.

10. An optical device, characterized in that: It comprises an optical fiber adapter and the BOX shell according to any one of claims 1 to 9, wherein the optical fiber adapter is installed on the optical fiber installation part of the BOX shell.

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