BOX packaged three-transmitting and three-receiving optical device

Abstract

The utility model belongs to the field of optical devices, and particularly relates to a BOX packaging three-transmitting and three-receiving optical device. Comprising a BOX shell, and a containing cavity is formed in the BOX shell; the signal transmitting module and the signal receiving module are installed in the containing cavity, the signal transmitting module comprises three signal transmitting ends and a beam combiner, the beam combiner is arranged corresponding to the three signal transmitting ends, the beam combiner is used for combining three beams of optical signals, and the three beams of optical signals are sent to the signal receiving module. The signal receiving module comprises three signal receiving ends; and the wavelength division multiplexer is mounted in the accommodating cavity, and the wavelength division multiplexer is arranged corresponding to the signal transmitting module and the signal receiving module. The utility model provides a BOX-packaged three-transmitting and three-receiving optical device, and aims to solve the problem that a conventional optical device is large in size.

Description

Technical Field

[0001] The utility model belongs to the field of optical devices, and particularly relates to a three-transmission and three-reception optical device with BOX packaging. 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. A three-transmission and three-reception optical device is a type of optical device, that is, an optical device including three signal transmission ends and three signal reception ends. The three-transmission and three-reception optical device is often used in the upgrade transition stage from 2.5G PON or 10G PON to 50G PON. In this application scenario, the three signal reception ends of the three-transmission and three-reception optical device respectively correspond to the communication wavelengths of 2.5G PON, 10G PON, and 50G PON.

[0003] In the prior art, the three signal transmission ends and the three signal reception ends in the three-transmission and three-reception optical device are usually set by using BOX packaging and TO packaging respectively. Therefore, the size of the entire three-transmission and three-reception optical device is usually large (especially in the width direction). For example: the optical device disclosed in the patent application with the application number 202121799889.6 and the name of a miniaturized three-transmission and three-reception optical component.

[0004] However, with the progress of technology, the integration requirements of the optical communication system are getting higher and higher, and the number of related devices in the optical communication system is also increasing. Therefore, the conventional optical device is more and more restricted in practical use due to its wide width. Summary of the Utility Model

[0005] The utility model provides a three-transmission and three-reception optical device with BOX packaging, aiming to solve the problem that the width of the conventional optical device is relatively wide.

[0006] To achieve the above purpose, the utility model provides a three-transmission and three-reception optical device with BOX packaging, including

[0007] a BOX housing, and an accommodation cavity is constructed inside the BOX housing;

[0008] a signal transmission module and a signal reception module, the signal transmission module and the signal reception module are installed inside the accommodation cavity, the signal transmission module includes three signal transmission ends and a beam combiner, the beam combiner is arranged corresponding to the three signal transmission ends, the beam combiner is used for combining three optical signals, and the signal reception module includes three signal reception ends;

[0009] a wavelength division multiplexer, the wavelength division multiplexer is installed in the accommodation cavity, and the wavelength division multiplexer is arranged corresponding to the signal transmission module and the signal reception module.

[0010] In this solution, three signal receivers are installed inside the BOX housing. When the three signal receivers are installed inside the BOX housing, compared with the prior art where the signal receiver TO of the optical device is encapsulated on the side wall of the BOX housing, the width of the optical device can be narrower, solving the deficiencies of the prior art.

[0011] Preferably, to ensure the normal use of the optical device, this solution further includes an optical fiber adapter, and the optical fiber adapter is installed on the BOX housing.

[0012] In this solution, the optical fiber adapter is installed on the side plate of the BOX installation part. After the optical fiber adapter is connected to the optical fiber, the optical device can realize the optical signal transmission with the optical fiber.

[0013] Preferably, for the convenience of installing the optical fiber adapter on the BOX housing, the BOX housing in this solution includes an optical fiber installation part, and the optical fiber installation part is higher than other parts of the BOX housing.

[0014] In this solution, the optical fiber installation part is provided for installing the optical fiber adapter. At the same time, since the optical fiber installation part is higher than other parts of the BOX housing, when the optical device is in use, other components that may interfere with the optical device can extend to the top of the optical device, thereby reducing the probability of interference between other components and the optical device.

[0015] Preferably, after the relevant parts are installed inside the accommodation cavity, the top of the accommodation cavity needs to be sealed. To solve the problem that the optical fiber installation part collides with the sealing tool when sealing the accommodation cavity, a accommodation groove is constructed between the optical fiber installation part and the accommodation cavity in this solution.

[0016] In this solution, since a accommodation groove is constructed between the optical fiber installation part and the accommodation cavity, the accommodation groove can accommodate the sealing tool when the sealing tool is working, thus solving the problem of the collision between the sealing tool and the optical fiber installation part.

[0017] Preferably, to ensure that the optical fiber adapter can communicate with the accommodation cavity after being installed on the optical fiber installation part. This solution further includes a connection cavity, and the connection cavity is arranged between the optical fiber installation part and the accommodation cavity, and the connection cavity is used to communicate the optical fiber installation part with the accommodation cavity.

[0018] Preferably, to ensure that the optical signal can enter the connection cavity from the accommodation cavity, the accommodation cavity in this solution is configured with an optical window, and the optical window is arranged corresponding to the optical fiber adapter.

[0019] Preferably, to allow the signal receiving module and the signal transmitting module to be installed inside the accommodation cavity and to keep the signal receiving module and the signal transmitting module in a closed environment. The BOX housing in this solution includes a base and a cover, the accommodation cavity is constructed inside the base, and the cover is used to close the accommodation cavity.

[0020] Since the BOX housing in this solution includes a base and a cover, when installing the signal receiving module and the signal transmitting module, the cover is in an uninstalled state at this time. After the signal receiving module and the signal transmitting module are installed, the cover is then installed on the base, and the accommodating cavity is closed. The signal receiving module and the signal transmitting module are located in a closed environment, avoiding interference from the external environment to the signal transmitting module and the signal receiving module.

[0021] Preferably, in order to convert the emitted light beam into a parallel light beam, the signal transmitting module in this solution further includes a collimating lens, and the collimating lens is arranged in one-to-one correspondence with the signal transmitting end.

[0022] In order to converge the light, the signal receiving module in this solution further includes a coupling lens, and the coupling lens is arranged in one-to-one correspondence with the signal receiving end.

[0023] Preferably, the signal transmitting module further includes an optical isolator, the optical isolator is arranged in one-to-one correspondence with the collimating lens, and the optical isolator is arranged at the rear end of the collimating lens.

[0024] Preferably, it further includes a porcelain part, the porcelain part is installed on the BOX housing, and both the signal transmitting module and the signal receiving module are installed at the porcelain part.

[0025] The beneficial effect of the present utility model is that: in this solution, three signal receiving ends are installed inside the BOX housing. When the three signal receiving ends are installed inside the BOX housing, compared with the prior art in which the signal receiving end TO of the optical device is encapsulated on the side wall of the BOX housing, the width of the optical device can be narrower, solving the deficiencies of the prior art. Description of the Drawings

[0026] Figure 1 It is a schematic internal view of the optical device in Embodiment 1.

[0027] Figure 2 It is a schematic diagram of the emission of the optical signal in Embodiment 1.

[0028] Figure 3 It is a schematic diagram of the reception of the optical signal in Embodiment 1.

[0029] Figure 4 It is a schematic diagram of the BOX housing in Embodiment 1 having a special shape.

[0030] Figure 5 It is a three-dimensional view of the optical device in Embodiment 2.

[0031] Figure 6 It is a schematic internal view of the optical device in Embodiment 2.

[0032] The reference numerals include: BOX housing 1, base 11, cover 12, optical fiber mounting portion 13, connection cavity 14, penetration 15, signal transmission module 2, first signal transmission end 21, second signal transmission end 22, third signal transmission end 23, collimating lens 24, optical isolator 25, beam combiner 26, signal reception module 3, first signal reception end 31, second signal reception end 32, third signal reception end 33, coupling lens 34, right-angle prism 35, filter 36, wavelength division multiplexer 4, fiber optic adapter 5, collimating lens 6, porcelain part 7. Detailed implementation

[0033] In order to make the objectives, technical solutions and advantages of the embodiments clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners 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.

[0034] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the contour of the corresponding components. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance.

[0035] Embodiment 1

[0036] Basically as shown in the attached Figure 1 As shown, a BOX-packaged three-transmitter and three-receiver optical device is mainly used in the upgrade and transition stage from 2.5G or 10G PON to 50G PON.

[0037] As Figure 1 As shown, the BOX-packaged three-transmitter and three-receiver optical device in the embodiment of the present disclosure mainly includes a BOX housing 1, a signal transmission module 2, a signal reception module 3, a wavelength division multiplexer 4, a fiber optic adapter 5 and a porcelain part 7.

[0038] The BOX housing 1 in the embodiment of the present disclosure is used to protect components such as the signal transmission module 2, the signal reception module 3 and the wavelength division multiplexer 4. At the same time, since the signal reception module 3 is accommodated inside the BOX housing 1, obviously, compared with the prior art in which the signal reception end TO is installed on the side wall of the optical device housing, the overall width of the optical device is smaller, which is beneficial to meeting the integration requirements of the optical communication system and solving the deficiencies of the prior art.

[0039] As Figure 4As shown, in the embodiment of the present disclosure, the specific structure of the BOX housing 1 includes a base 11 and a cover 12. The base 11 is generally rectangular 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 constructed with a rectangular accommodation cavity. Components such as a signal transmission module 2, a signal reception module 3, and a wavelength division multiplexer 4 can be installed inside the accommodation cavity. The cover 12 is in the shape of a rectangular plate, and the cover 12 can be installed on the base 11 through installation methods such as sealing welding in the prior art to completely enclose the accommodation cavity, so as to form an airtight environment inside the accommodation cavity.

[0040] Of course, in the embodiment of the present disclosure, the BOX housing 1 is more preferably in the shape of a rectangular box. However, obviously, in some other embodiments, the BOX housing 1 can be in an irregular shape, such as Figure 4 shown.

[0041] When the top of the BOX housing 1 in the embodiment of the present disclosure is not covered by the cover 12, the top of the BOX housing 1 is open, as Figure 1 shown. Therefore, when manufacturing this optical device, automated equipment can automatically install relevant components (such as lenses and Z-blocks, etc.) inside the BOX housing 1, with high installation efficiency. At the same time, when the automated equipment uniformly installs components inside the BOX housing 1, the installation accuracy and coupling accuracy of the components are higher. After all the components are installed, then install the cover 12 on the BOX housing 1, and the components are in a closed environment, solving the interference of the external environment on the inside of the optical device.

[0042] In the embodiment of the present disclosure, the cover 12 is preferably set to a deep black color, or an absorbent coating is provided on the cover 12. The deep black cover 12 or the absorbent coating is used to reduce the optical crosstalk inside the accommodation cavity.

[0043] As Figure 1 shown, in the embodiment of the present disclosure, both the signal transmission module 2 and the signal reception module 3 are installed inside the accommodation cavity. The signal transmission module 2 specifically includes three signal transmission ends, and the signal reception module 3 includes three signal reception ends. The three signal reception ends and the three signal transmission ends can respectively adapt to 50G PON communication wavelengths, 10G PON communication wavelengths, and 2.5G PON communication wavelengths. In the embodiment of the present disclosure, three signal transmission ends and three signal reception ends cooperate to achieve three transmissions and three receptions of optical signals.

[0044] As Figure 2As shown in the figure, the signal transmission module 2 in the embodiments of the present disclosure specifically includes a first signal transmission end 21, a second signal transmission end 22, a third signal transmission end 23, a collimating lens 24, an optical isolator 25, and a beam combiner 26. The three signal transmission 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 transmission end 21, the second signal transmission end 22, and the third signal transmission 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 optical isolators 25, and the optical isolator 25 is located at the rear end of the collimating lens 24. The optical signal emitted from the collimating lens 24 enters the optical isolator 25. The beam combiner 26 is arranged corresponding to the three optical isolators 25, and the beam combiner 26 is used to combine the optical signals emitted from the optical isolator 25. The beam combiner 26 is preferably a PBS.

[0045] As Figure 2 As shown in the figure, the working process of the signal transmission module 2 in the embodiments of the present disclosure is as follows: The three lasers respectively emit three independent optical signals, and the three optical signals respectively enter the corresponding collimating lenses 24, and the collimating lenses 24 convert the light beams into parallel light. The light beams converted into three parallel light beams pass through the optical isolator 25 and are combined by the beam combiner 26. Finally, the combined light beam is emitted from the beam combiner 26.

[0046] Since the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 have heat generation problems during the working process. At the same time, the working power of the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 is easily affected by the ambient temperature. Therefore, the signal transmission module 2 in the embodiments of the present disclosure further includes a thermoelectric cooler (TEC), and the thermoelectric cooler is installed at the bottom of the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 (the thermoelectric cooler is not shown in the figure). Since the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 are all assembled on the same thermoelectric cooler, during use, the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 can all be locked at a constant temperature by the thermoelectric cooler, and the first signal transmission end 21, the second signal transmission end 22, and the third signal transmission end 23 are less affected by the ambient temperature.

[0047] As Figure 2As shown, the wavelength division multiplexer 4 is installed corresponding to the beam combiner 26. The wavelength division multiplexer 4 includes an IN port and a COM port. The IN port of the wavelength division multiplexer 4 is set corresponding to the beam combiner 26. The optical signal emitted from the beam combiner 26 enters from the IN port of the wavelength division multiplexer 4 and then exits from the COM port of the wavelength division multiplexer 4.

[0048] To achieve the adaptation between the optical device and the optical fiber, in the embodiments of the present disclosure, the optical fiber adapter 5 is installed on the side wall of the BOX housing. The optical fiber adapter 5 is set corresponding to the COM port of the wavelength division multiplexer 4, as Figure 1 shown. After the optical signal exits from the COM port 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 provided corresponding to the optical fiber adapter 5 to convert the divergent light beam output from the optical fiber into parallel light, or to couple the parallel light into the optical fiber.

[0049] It should be noted that: due to the specific height of the optical fiber adapter 5, therefore, in order to ensure the installation of the optical fiber adapter 5, in the embodiments of the present disclosure, a fiber installation portion 13 is provided at the end of the optical device, as Figure 1 shown. The fiber installation portion 13 is in a convex shape. The height of the fiber installation portion 13 is adapted to the height of the optical fiber adapter 5 to ensure that the optical fiber adapter 5 can be installed at the end position of the optical device. At the same time, the height of other parts of the optical device except the fiber installation portion 13 is lower than that of the optical fiber adapter 5, so that a stepped shape is formed at the top of the optical device. Therefore, when installing and using the optical device of the embodiments of the present disclosure, other components, such as a PCB board, etc., can be accommodated at the top of the optical device, thereby reducing the interference between the optical device and other components.

[0050] As Figure 3 shown, the signal receiving module 3 in the embodiments of the present disclosure 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 set corresponding to the wavelength division multiplexer 4, and the optical signal emitted from the IN port of the wavelength division multiplexer 4 can directly enter the filter 36. Then, the coupling lens 34 is set corresponding to the filter 36, and three coupling lenses 34 are provided, which are used to adapt to three optical signals respectively. The right-angle prism 35 is then set 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.

[0051] In the embodiment of the present disclosure, the porcelain part 7 is also installed at the end of the BOX housing 1, and the fiber optic adapter 5 and the porcelain part 7 are respectively arranged at both ends of the BOX housing 1. When the signal transmitting module 2 and the signal receiving module 3 are installed inside the BOX housing 1, both the signal transmitting module 2 and the signal receiving module 3 are located at the position of the porcelain part 7. At the same time, flexible boards are respectively arranged at the upper and lower ends of the porcelain part 7. Power supply and signal transmission to the signal receiving module 3 and the signal transmitting module 2 are realized through the two flexible boards. Since the signal transmitting module 2 and the signal receiving module 3 are located at the position of the porcelain part 7, the distance between the signal transmitting module 2 and the signal receiving module 3 and the porcelain part 7 is relatively close, which is beneficial to signal transmission.

[0052] The following is a more detailed description through specific embodiments: 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 light beams converted into three parallel light beams are combined through a beam combiner 26 and are incident into a wavelength division multiplexer 4. Finally, the optical signal emitted from the wavelength division multiplexer 4 passes through a Fiber collimating lens 6 and enters the fiber optic adapter 5.

[0053] The optical signal incident from the fiber optic adapter 5 first passes through the Fiber collimating lens 6 and enters the wavelength division multiplexer 4. The wavelength division multiplexer 4 totally reflects the optical signal and splits it into three optical signals. The optical signals are emitted from the IN end of the wavelength division multiplexer 4. The optical signals emitted from the IN end of the wavelength division multiplexer 4 sequentially pass through a filter 36 and a coupling lens 34 and are incident into a right-angle prism 35. The right-angle prism 35 guides the three optical signals into the signal receiving end.

[0054] Embodiment 2

[0055] The difference between the embodiment of the present disclosure and Embodiment 1 is that, as Figure 5 and Figure 6 shown, when the cover 12 is installed by means of sealing welding, therefore, a position needs to be reserved at the position of the cover 12 for the sealing welding tool to work.

[0056] In the embodiment of the present disclosure, a receiving groove is provided between the optical fiber installation part 13 and the receiving cavity, as Figure 6 shown. The edge of the cover 12 is exposed through the receiving groove. Therefore, when the sealing welding tool performs sealing welding, the sealing welding tool can be accommodated inside the receiving groove, thus solving the problem that the sealing welding tool collides with the optical fiber installation part 13.

[0057] When a receiving groove is provided between the optical fiber installation part 13 and the receiving cavity, in order to ensure that the optical fiber installation part 13 can communicate with the inside of the receiving cavity. Therefore, in the embodiment of the present disclosure, a connecting cavity 14 is provided between the optical fiber installation part 13 and the receiving cavity, as Figure 5As shown in the figure. To ensure that the connection cavity 14 can communicate with the accommodation cavity, in the embodiments of the present disclosure, an optical window is provided between the connection cavity 14 and the accommodation cavity for communication, so as to ensure that the optical signal can enter the inside of the fiber optic adapter 5 through the optical window. At the same time, preferably, the collimating lens 24 is also installed inside the connection cavity 14.

[0058] Since the optical signal is prone to reflection when passing through the optical window. Therefore, in the embodiments of the present disclosure, the optical window is inclined. During implementation, the inner wall of the accommodation cavity can be set as an inclined surface. Therefore, when the optical window is installed at the inner wall of the accommodation cavity, the optical window is in an inclined state, as Figure 6 shown.

[0059] When installing the optical window at the inner wall of the accommodation cavity, 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. To prevent the solder from accumulating at the lower part of the optical window, in the embodiments of the present disclosure, a groove is provided at the bottom of the accommodation groove, and the groove is located below the optical window. When the optical window is welded and installed on the inner wall of the accommodation groove, the solder can flow downward and be accommodated in the groove.

[0060] The above are only the embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these 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 practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A BOX packaged three-transmitter and three-receiver optical device, characterized in that: include, A BOX shell, wherein a receiving cavity is configured inside the BOX shell; A signal transmitting module and a signal receiving module, wherein the signal transmitting module and the signal receiving module are installed inside the accommodating cavity, the signal transmitting module comprises three signal transmitting ends and a beam combiner, the beam combiner is arranged corresponding to the three signal transmitting ends, the beam combiner is used to combine three optical signals, and the signal receiving module comprises three signal receiving ends; A wavelength division multiplexer is installed in the accommodating cavity and is arranged corresponding to the signal transmitting module and the signal receiving module.

2. The BOX packaged three-transmitter and three-receiver optical device according to claim 1, characterized in that: It also includes an optical fiber adapter, which is installed in the BOX shell.

3. The BOX packaged three-transmitter and three-receiver optical device according to claim 2, characterized in that: The BOX shell includes an optical fiber installation portion, and the optical fiber installation portion is higher than other parts of the BOX shell.

4. The BOX packaged three-transmitter and three-receiver optical device according to claim 3, characterized in that: An accommodating groove is configured between the optical fiber installation portion and the accommodating cavity.

5. The BOX packaged three-transmitter and three-receiver optical device according to claim 4, characterized in that: It also includes a connecting cavity, which is arranged between the optical fiber installation part and the accommodating cavity, and is used to connect the optical fiber installation part with the accommodating cavity.

6. The BOX packaged three-transmitter and three-receiver optical device according to claim 5, characterized in that: The accommodating cavity is provided with a light window, and the light window is arranged corresponding to the optical fiber adapter.

7. The BOX packaged three-transmitter and three-receiver optical device according to claim 1, characterized in that: The BOX shell includes a base and a cover, the accommodating cavity is constructed in the base, and the cover is used to close the accommodating cavity.

8. The BOX packaged three-transmitter and three-receiver optical device according to any one of claims 1 to 7, characterized in that: The signal transmitting module further comprises a collimating lens, and the collimating lens is arranged in a one-to-one correspondence with the signal transmitting end; and / or; The signal receiving module further includes a coupling lens, and the coupling lens is arranged in a one-to-one correspondence with the signal receiving end.

9. The BOX packaged three-transmitter and three-receiver optical device according to claim 8, characterized in that: The signal transmission module further includes an optical isolator, which is arranged in a one-to-one correspondence with the collimating lens and is arranged at the rear end of the collimating lens.

10. The BOX packaged three-transmitter and three-receiver optical device according to claim 1, characterized in that: It also includes a porcelain piece, which is installed on the BOX shell, and the signal transmitting module and the signal receiving module are both installed on the porcelain piece.

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