A wave divider and communication module

Abstract

The present application relates to the technical field of optical communication, and in particular to a wave splitter and a communication module. The wave splitter comprises a shell and a wave splitting assembly. A public port is formed on one side wall of the shell. First, second and third receiving ports are formed on two side walls adjacent to the public port. The wave splitting assembly comprises a pentagonal prism and first, second and third filters. An optical signal enters the pentagonal prism through the public port, is reflected and enters the first filter. The first filter filters out optical signals of a first wavelength and emits them through the first receiving port. The remaining optical signals are reflected and enter the second filter. The second filter filters out optical signals of a second wavelength and emits them through the second receiving port. The remaining optical signals are reflected and enter the third filter. The third filter filters out optical signals of a third wavelength and emits them through the third receiving port. The above structure reduces the loss of optical signals and improves the reliability of wave splitting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication technology, in particular to a wave splitter and a communication module. BACKGROUND

[0002] In order to be compatible with the last generation GPON and 10G PON technology, a more stringent challenge is put forward for the 50G combo PON wave splitter.

[0003] At present, when the 50G combo PON wave is split, multiple wave splitters are used to split different wavelengths, and multiple independent wave splitters exist in the coupling process. The light signal loss is poor in reliability and high in cost. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a wave splitter and a communication module to solve the problem of multiple independent wave splitters in the coupling process, which has light signal loss, poor reliability and high cost.

[0005] The present application discloses a wave splitter, which comprises a shell and a wave splitting assembly, a common port is formed on one side wall of the shell, and first, second and third receiving ports are formed on two side walls adjacent to the common port; the wave splitting assembly is arranged in the shell and comprises a pentagonal prism and first, second and third filters arranged on the outer circumferential surface of the pentagonal prism; the optical signal enters the pentagonal prism through the common port, is reflected and then enters the first filter, the first filter is used for filtering out the optical signal of the first wavelength and emitting it through the first receiving port; the remaining optical signal is continuously reflected and then enters the second filter, the second filter is used for filtering out the optical signal of the second wavelength and emitting it through the second receiving port; the remaining optical signal is continuously reflected and then enters the third filter, and the third filter is used for filtering out the optical signal of the third wavelength and emitting it through the third receiving port.

[0006] Optionally, the pentagonal prism comprises a first mounting surface, a second mounting surface, a first reflecting surface, a second reflecting surface and an incident surface connected in sequence, and the optical signal of the common port enters the pentagonal prism through the incident surface; the first filter and the second filter are arranged on the first mounting surface, and the third filter is arranged on the first reflecting surface; a first reflecting film is arranged on the side of the first filter away from the pentagonal prism, a second reflecting film is arranged on the side of the second filter away from the pentagonal prism, and a second prism is further arranged on the first mounting surface, and the second prism is located on the side of the second filter away from the first filter; a fourth filter is arranged on the second mounting surface, and a fourth reflecting film is arranged on the side of the fourth filter away from the prism.

[0007] Optionally, the top of the shell forms a receiving cavity with an opening, the split wave assembly is arranged in the receiving cavity, the first receiving port and the second receiving port are located on the same side wall of the shell, and the third receiving port is located on another side wall of the shell.

[0008] Optionally, the side of the shell away from the common port is further formed with a transmitting port, and the transmitting port is arranged opposite to the fourth filter.

[0009] Optionally, the shell is further provided with a first lens, a second lens, a third lens and a fourth lens, the first lens is located between the first filter and the first receiving port, the second lens is located between the second filter and the second receiving port, the third lens is located between the third filter and the third receiving port, and the fourth lens is located between the common port and the incident surface.

[0010] Optionally, the first reflecting surface is further provided with a fifth filter and a sixth filter, the fifth filter is located on the reflected light path of the first filter and is used for filtering out light signals of a first wavelength, and the sixth filter is located on the reflected light path of the second filter and is used for filtering out light signals of a second wavelength.

[0011] Optionally, the first lens, the second lens, the third lens and the fourth lens are collimating lenses.

[0012] Optionally, the first filter, the second filter, the third filter and the fourth filter are all fixed on a five-cornered prism by using glue, and the first lens, the second lens, the third lens and the fourth lens are all fixed in the shell by using glue; wherein, in the process of installing the fourth lens in the shell, the distance between the fourth lens and the common port and the incident surface is adjusted, so that when the optical power of the first receiving port, the second receiving port and the third receiving port reaches a target optical power, the fourth lens is fixed by using glue.

[0013] Optionally, one side of the shell is provided with an SC joint connector, the SC joint connector is fixed to the shell by using laser welding, and the SC joint connector is used for installing an optical fiber, so that the optical signal can reach the common port along the optical fiber.

[0014] The application further discloses a communication module, which comprises the split wave filter.

[0015] Compared with the prior art, the wave splitter and the communication module provided by the embodiment of the present application have the beneficial effects that the wave splitting component is arranged in the shell, the optical signal can be split by the wave splitting component, specifically, the wave splitting component comprises a five-cornered prism and a first filter, a second filter and a third filter arranged on the outer circumferential surface of the five-cornered prism, the optical fiber is located outside the shell and arranged at the common port, the optical signal enters the shell along the common port and enters the five-cornered prism, and after being reflected, the optical signal enters the first filter, the first filter is used for filtering out the optical signal of the first wavelength and emitting along the first receiving port; the remaining optical signal continues to be reflected and enters the second filter, the second filter is used for filtering out the optical signal of the second wavelength and emitting along the second receiving port; the remaining optical signal continues to be reflected and enters the third filter, the third filter is used for filtering out the optical signal of the third wavelength and emitting along the third receiving port. The embodiment does not need to use the coupling of multiple wave splitters to split the optical signal, reduces the loss of the optical signal, improves the reliability of the wave splitting, reduces the number of devices, and further reduces the cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical solutions of the present application will be further described in detail below with reference to the drawings and embodiments, and the drawings are as follows:

[0017] Figure 1 is one of the overall structure schematic diagrams of the wave splitter provided by the embodiment of the present application;

[0018] Figure 2 is the second overall structure schematic diagram of the wave splitter provided by the embodiment of the present application;

[0019] Figure 3 is the top view of the wave splitter provided by the embodiment of the present application;

[0020] Figure 4 is the structure schematic diagram of the wave splitting component provided by the embodiment of the present application;

[0021] Figure 5 is the structure schematic diagram of the wave splitting component in the shell provided by the embodiment of the present application.

[0022] The various reference signs in the drawings are as follows:

[0023] 10. Housing; 110. Opening; 101. Common port; 102. First receiving port; 103. Second receiving port; 104. Third receiving port; 105. Transmitting port; 20. Wavelength division multiplexing assembly; 210. Pentagonal prism; 211. First mounting surface; 212. Second mounting surface; 213. First reflecting surface; 214. Second reflecting surface; 215. Incident surface; 220. First filter; 221. First reflective film; 230. Second filter; 231. Second reflective film; 240. Third filter; 250. Fourth filter; 251. Fourth reflective film; 260. Fifth filter; 270. Sixth filter; 310. First lens; 320. Second lens; 330. Third lens; 340. Fourth lens; 40. SC connector; 50. Second prism. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] This invention provides a wavelength division multiplexer, such as... Figures 1 to 5 As shown, the device includes a housing 10 and a wavelength division multiplexing (WDM) assembly 20 disposed within the housing 10. A common port 101 is formed on one side wall of the housing 10, and two side walls adjacent to the common port 101 form a first receiving port 102, a second receiving port 103, and a third receiving port 104. The WDM assembly 20 includes a pentagonal prism 210 and a first filter 220, a second filter 230, and a third filter 240 disposed on the outer peripheral surface of the pentagonal prism 210. An optical signal enters the pentagonal prism 210 along the common port 101, and after reflection, enters the first filter 220. The first filter 220 is used to filter out the optical signal of the first wavelength and exits along the first receiving port 102. The remaining optical signal continues to be reflected and enters the second filter 230. The second filter 230 is used to filter out the optical signal of the second wavelength and exits along the second receiving port 103. The remaining optical signal continues to be reflected and enters the third filter 240. The third filter 240 is used to filter out the optical signal of the third wavelength and exits along the third receiving port 104.

[0026] The wave division assembly 20 is arranged in the shell 10, and the wave division assembly 20 can divide the optical signal. Specifically, the wave division assembly 20 includes a pentagonal prism 210, a first filter 220, a second filter 230 and a third filter 240 arranged on the outer circumferential surface of the pentagonal prism 210. The optical fiber is arranged at the common port 101 outside the shell 10. The optical signal enters the shell 10 through the common port 101 and enters the pentagonal prism 210. After being reflected, the optical signal enters the first filter 220. The first filter 220 is used for filtering out the optical signal of the first wavelength and emitting the optical signal along the first receiving port 102. The remaining optical signal continues to be reflected and enters the second filter 230. The second filter 230 is used for filtering out the optical signal of the second wavelength and emitting the optical signal along the second receiving port. The remaining optical signal continues to be reflected and enters the third filter 240. The third filter 240 is used for filtering out the optical signal of the third wavelength and emitting the optical signal along the third receiving port 104. In this embodiment, the wave division of the optical signal can be achieved without the coupling of multiple wave division filters, the loss of the optical signal is reduced, the reliability of the wave division is improved, the number of devices is reduced, and the cost is reduced.

[0027] As a preferred scheme of this embodiment, the pentagonal prism 210 includes a first mounting surface 211, a second mounting surface 212, a first reflecting surface 213, a second reflecting surface 214 and an incident surface 215 connected in sequence. The optical signal of the common port 101 enters the pentagonal prism 210 along the incident surface 215. The first filter 220 and the second filter 230 are arranged on the first mounting surface 211, and the third filter 240 is arranged on the first reflecting surface 213. The first filter 220 is provided with a first reflecting film 221 on the side away from the pentagonal prism 210. The second filter 230 is provided with a second reflecting film 231 on the side away from the pentagonal prism 210. The first mounting surface 211 is further provided with a second prism 50. The second prism 50 is located on the side of the second filter 230 away from the first filter 220. The second mounting surface 212 is provided with a fourth filter 250. The fourth filter 250 is provided with a fourth reflecting film 251 on the side away from the prism.

[0028] Referring to Figures 3 to 5 , Figure 5The arrow direction of the dotted line part in the figure is the transmission path of the optical signal. In the embodiment, the optical signal enters into the shell 10 through the common port 101, is incident on the incident surface 215, and reaches the fourth filter 250 on the second mounting surface 212 in the horizontal direction. The fourth filter 250 is reflected by the fourth reflecting film 251 arranged on the fourth filter 250 back into the pentagonal prism 210 to the second reflecting surface 214. The second reflecting surface 214 reflects the optical signal into the first filter 220 on the first mounting surface 211. The first filter 220 filters out the optical signal of the first wavelength. The optical signal of the first wavelength is emitted along the first receiving port 102, and the filtering of the optical signal of the first wavelength is completed. The remaining optical signal is reflected by the first reflecting film 221 arranged on the side of the first filter 220 into the fifth filter 260 arranged on the first reflecting surface 213. The fifth filter 260 is used to filter out the optical signal of the first wavelength to prevent the optical signal of the first wavelength from interfering with the remaining optical signal. The remaining optical signal is reflected on the first reflecting surface 213 to the second filter 230 on the first mounting surface 211. The second filter 230 filters out the optical signal of the second wavelength. The optical signal of the second wavelength is emitted along the second receiving port 103, and the filtering of the optical signal of the second wavelength is completed. The remaining optical signal is reflected by the second reflecting film 231 arranged on the side of the second filter 230 into the sixth filter 270 arranged on the first reflecting surface 213. The sixth filter 270 is used to filter out the optical signal of the second wavelength to prevent the optical signal of the second wavelength from interfering with the remaining optical signal. The remaining optical signal is reflected on the first reflecting surface 213 to the second prism 50 on the first mounting surface 211. The remaining optical signal is reflected on the second prism 50 to the third filter 240 arranged on the first reflecting surface 213. The third filter 240 filters out the optical signal of the third wavelength. The optical signal of the third wavelength is emitted along the third receiving port 104, and the filtering of the optical signal of the second wavelength is completed. The above process is the detailed filtering process of the optical signal.

[0029] The filter of the embodiment is suitable for 50G combo PON to filter the uplink wavelengths 1270 + / - 10nm, 1286 + / - 2nm, and 1310 + / - 20nm.

[0030] In actual application, the first filter 220 cannot filter out the light signal of the first wavelength completely, and there is a small amount of light signal of the first wavelength in the remaining light signal, and the fifth filter 260 can filter out the small amount of light signal of the first wavelength; similarly, the second filter 230 cannot filter out the light signal of the second wavelength completely, and there is a small amount of light signal of the second wavelength in the remaining light signal, and the sixth filter 270 can filter out the small amount of light signal of the second wavelength, so as to realize the requirement of high isolation on the wave division assembly 20. In the embodiment, the fifth filter 260 and the sixth filter 270 are coated with an absorption film on the side away from the pentagonal prism 210, so that most of the crosstalk light can be absorbed, and the influence of the crosstalk light on the system in the form of stray light is reduced.

[0031] The second prism 50 is a trapezoidal prism.

[0032] As a preferred scheme of the embodiment, referring to Figures 1 to 3 , the top of the shell 10 is provided with a receiving cavity with an opening 110, the wave division assembly 20 is arranged in the receiving cavity, the first receiving port 102 and the second receiving port 103 are located on the same side wall of the shell 10, and the third receiving port 104 is located on the other side wall of the shell 10.

[0033] In the assembly of the wave division assembly 20, the wave division assembly 20 can be arranged in the receiving cavity through the opening 110, which is convenient for operation, and the specific arrangement mode of the first receiving port 102, the second receiving port 103 and the third receiving port 104 on the shell 10 is given. Specifically, the first receiving port 102 and the second receiving port 103 are located on the same side wall of the shell 10, and the third receiving port 104 is located on the other side wall of the shell 10.

[0034] As a preferred scheme of the embodiment, referring to Figure 2 and Figure 3 , the shell 10 is further provided with a transmitting port 105 away from the common port 101, and the transmitting port 105 is arranged opposite to the fourth filter 250.

[0035] In the embodiment, the external communication device is arranged on the side of the shell 10 close to the transmitting port 105, and the light beam of the external communication device is incident on the fourth filter 250 through the transmitting port 105, transmitted to the fourth lens 340 through the pentagonal prism 210, and then converged to the optical fiber arranged at the common port 101, so as to realize the communication between the optical signal of the external communication device and the optical fiber.

[0036] As a preferred scheme of the embodiment, referring to Figure 3 and Figure 5The shell 10 is further provided with a first lens 310, a second lens 320, a third lens 330 and a fourth lens 340, the first lens 310 is located between the first filter 220 and the first receiving port 102, the second lens 320 is located between the second filter 230 and the second receiving port 103; the third lens 330 is located between the third filter 240 and the third receiving port 104, and the fourth lens 340 is located between the common port 101 and the incident surface 215.

[0037] The first lens 310, the second lens 320 and the third lens 330 are arranged to make the first wavelength optical signal, the second wavelength optical signal and the third wavelength optical signal into parallel light, thereby enhancing the intensity and brightness of the light beam, the fourth lens 340 is arranged, and the distance between the fourth lens 340 and the common port 101 and the incident surface 215 is adjusted to ensure that the optical signals received by the first receiving port 102, the second receiving port 103 and the third receiving port 104 reach the target optical power at the same time. Therefore, the fourth lens 340 is fixed.

[0038] As a preferred scheme of the embodiment, the first filter 220, the second filter 230, the third filter 240 and the fourth filter 250 are all fixed on the five-sided prism 210 by using glue, and the first lens 310, the second lens 320, the third lens 330 and the fourth lens 340 are fixed in the shell 10 by using glue; wherein, during the installation of the fourth lens 340 in the shell 10, the distance between the fourth lens 340 and the common port 101 and the incident surface 215 is adjusted, so that when the optical power of the first receiving port 102, the second receiving port 103 and the third receiving port 104 reaches the target optical power, the fourth lens 340 is fixed by using glue.

[0039] The above mounting method in the embodiment has low mounting requirements, is easy to operate, can make the connection between each component more firm, reduces the possibility of failure, and improves the reliability of the system. The above elements are fixed by using UV glue.

[0040] As a preferred scheme of the embodiment, referring to Figures 1 to 3 One side of the shell 10 is provided with an SC connector 40, the SC connector 40 is fixed with the shell 10 by laser welding, and the SC connector 40 is used to install an optical fiber, so that the optical signal can reach the common port 101 along the optical fiber.

[0041] The shell 10 and the SC connector 40 are fixed by laser welding, avoiding the traditional online laser welding method, which can effectively reduce the difficulty of coupling platform, and the welding is more stable.

[0042] The embodiment of the present application further discloses a communication module comprising the wave divider in the foregoing embodiment. The communication module comprises the same structure and beneficial effects as the wave divider in the foregoing embodiment. The structure and beneficial effects of the wave divider have been described in detail in the foregoing embodiment, and will not be described here again.

[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Those skilled in the art can modify the technical solutions recorded in the above embodiments, or make equivalent replacements to some of the technical features; and all these modifications and replacements shall belong to the protection scope of the claims of the present application.

Claims

1. A splitter, characterized by include: The housing has a common port formed on one side wall, and a first receiving port, a second receiving port, and a third receiving port formed on two side walls adjacent to the common port; A wave division component, disposed within the housing, includes a pentagonal prism and a first filter, a second filter, and a third filter disposed on the outer peripheral surface of the pentagonal prism; The optical signal enters the pentagonal prism through the common port, and after reflection, enters the first filter. The first filter is used to filter out the optical signal of the first wavelength and exits through the first receiving port. The remaining optical signal continues to be reflected and enters the second filter. The second filter is used to filter out the optical signal of the second wavelength and exits through the second receiving port. The remaining optical signal continues to be reflected and enters the third filter. The third filter is used to filter out the optical signal of the third wavelength and exits through the third receiving port. The pentagonal prism includes a first mounting surface, a second mounting surface, a first reflecting surface, a second reflecting surface, and an incident surface connected in sequence. The optical signal at the common port enters the pentagonal prism along the incident surface. The first filter and the second filter are both disposed on the first mounting surface, and the third filter is disposed on the first reflecting surface; The first filter has a first reflective film on the side away from the pentagonal prism, and the second filter has a second reflective film on the side away from the pentagonal prism. A second prism is also provided on the first mounting surface, and the second prism is located on the side of the second filter away from the first filter. A fourth filter is provided on the second mounting surface, and a fourth reflective film is provided on the side of the fourth filter facing away from the prism; The top of the housing forms an accommodating cavity with an opening, the wave division assembly is disposed in the accommodating cavity, the first receiving port and the second receiving port are located on the same side wall of the housing, and the third receiving port is located on the other side wall of the housing; A transmission port is also formed on the side of the housing opposite to the common port, and the transmission port is disposed opposite to the fourth filter; The first reflective surface is further provided with a fifth filter and a sixth filter. The fifth filter is located on the reflected light path of the first filter and is used to filter out the light signal of the first wavelength. The sixth filter is located on the reflected light path of the second filter and is used to filter out the light signal of the second wavelength.

2. The splitter of claim 1, wherein The housing also contains: The system comprises a first lens, a second lens, a third lens, and a fourth lens, wherein the first lens is located between the first filter and the first receiving port, the second lens is located between the second filter and the second receiving port, the third lens is located between the third filter and the third receiving port, and the fourth lens is located between the common port and the incident surface.

3. The splitter of claim 2, wherein, The first lens, the second lens, the third lens, and the fourth lens are collimating lenses.

4. The wave divider according to claim 3, characterized in that The first filter, the second filter, the third filter and the fourth filter are fixed on the pentagonal prism by using glue, and the first lens, the second lens, the third lens and the fourth lens are fixed in the shell by using glue; In the process of installing the fourth lens in the shell, the distance between the fourth lens and the common port and the incident surface is adjusted, so that when the optical power of the first receiving port, the second receiving port and the third receiving port reaches the target optical power, the fourth lens is fixed by using glue.

5. The splitter of any of claims 1 to 4, wherein, One side of the shell is provided with an SC joint connector, the SC joint connector is fixed with the shell by laser welding, and the SC joint connector is used for installing an optical fiber, so that an optical signal can reach the common port along the optical fiber.

6. A communication module, characterized in that The splitter comprises the splitter according to any one of claims 1 to 5.

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