Wave separator and communication module

Abstract

The invention relates to the technical field of optical communication, in particular to a wave separator and a communication module. The wave separator comprises a shell and a wave separation assembly, a common port is formed in one side wall of the shell, and a first receiving port, a second receiving port and a third receiving port are formed in two side walls adjacent to the common port; the wave division assembly comprises a pentagonal prism, a first filter, a second filter and a third filter; an optical signal enters the pentagonal prism along the public port and enters the first filter after being reflected, and the first filter is used for filtering out the optical signal with a first wavelength and emitting the optical signal along the first receiving port; the residual optical signal enters a second filter after being reflected, and the second filter is used for filtering out an optical signal with a second wavelength and emitting the optical signal along a second receiving port; and the residual optical signal enters a third filter after being reflected, and the third filter is used for filtering out an optical signal with a third wavelength and emitting the optical signal along a third receiving port. According to the structure, the loss of optical signals is reduced, and the reliability of wave division is improved.

Description

Technical Field

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

[0002] In order to be compatible with the previous generation GPON and 10G PON technologies, 50G combo PON splitters are faced with more stringent challenges.

[0003] Currently, when splitting 50G combo PON, multiple splitters are used to split different wavelengths. Multiple independent splitters cause optical signal loss during the coupling process, have poor reliability and high cost. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a wavelength splitter and a communication module to solve the problems of optical signal loss, poor reliability and high cost in the coupling process of multiple independent wavelength splitters in the prior art.

[0005] The invention discloses a wave splitter, comprising a shell and a wave splitter assembly, wherein a common port is formed on one side wall of the shell, and a first receiving port, a second receiving port and a third receiving port are formed on two side walls arranged adjacent to the common port; the wave splitter assembly is arranged in the shell, and comprises a pentagonal prism and a first filter, a second filter and a third filter arranged on the outer peripheral surface of the pentagonal prism; an optical signal enters the pentagonal prism along the common port, enters the first filter after reflection, the first filter is used to filter out an optical signal of a first wavelength, and emits it along the first receiving port; the remaining optical signal continues to enter the second filter after reflection, the second filter is used to filter out an optical signal of a second wavelength, and emits it along the second receiving port; the remaining optical signal continues to enter the third filter after reflection, the third filter is used to filter out an optical signal of a third wavelength, and emits it along the third receiving port.

[0006] Optionally, the pentagonal prism includes a first mounting surface, a second mounting surface, a first reflecting surface, a second reflecting surface and an incident surface which are connected in sequence, and the optical signal of the common port enters the pentagonal prism along the incident surface; the first filter and the second filter are both 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, and a second reflecting film is arranged on the side of the second filter away from the pentagonal prism; a second prism is also 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 accommodating cavity with an opening, the wave splitting component is arranged in the accommodating 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 the other side wall of the shell.

[0008] Optionally, a transmission port is further formed on a side of the housing away from the common port, and the transmission 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, a fifth filter and a sixth filter are further provided on the first reflecting surface, the fifth filter is located on the reflected light path of the first filter, and is used to filter out the optical signal of the first wavelength, and the sixth filter is located on the reflected light path of the second filter, and is used to filter out the optical signal of the 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 the pentagonal prism by glue, and the first lens, the second lens, the third lens and the fourth lens are fixed in the shell by glue; wherein, during the process of installing the fourth lens in the shell, the distance between the common port and the incident surface of the fourth lens 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 glue.

[0013] Optionally, an SC connector is provided on one side of the shell, and the SC connector is fixed to the shell by laser welding. The SC connector is used to install an optical fiber so that an optical signal can reach a common port along the optical fiber.

[0014] The present invention also discloses a communication module, comprising the above-mentioned splitter.

[0015] Compared with the prior art, the beneficial effects of the wave splitter and communication module provided by the embodiment of the present invention are: the wave splitter component is arranged in the shell, and the optical signal can be split by the wave splitter component. Specifically, the wave splitter component includes a pentagonal prism and a first filter, a second filter, and a third filter arranged on the outer peripheral surface of the pentagonal 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 pentagonal prism, and enters the first filter after reflection. The first filter is used to filter out the optical signal of the first wavelength and emit it along the first receiving port; the remaining optical signal continues to enter the second filter after reflection, and the second filter is used to filter out the optical signal of the second wavelength and emit it along the second receiving end; the remaining optical signal continues to enter the third filter after reflection, and the third filter is used to filter out the optical signal of the third wavelength and emit it along the third receiving port. This embodiment can realize the splitting of optical signals without the help of coupling of multiple wave splitters, reduces the loss of optical signals, and improves the reliability of wave splitting, while reducing the number of components, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 This is one of the overall structural schematic diagrams of the wave splitter provided in the embodiment of the present invention;

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

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

[0020] Figure 4 is a schematic structural diagram of a wave splitting component provided by an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the wave splitting component provided by an embodiment of the present invention in a housing.

[0022] The reference numerals in the figures are:

[0023] 10. Shell; 110. Opening; 101. Common port; 102. First receiving port; 103. Second receiving port; 104. Third receiving port; 105. Transmitting port; 20. Wave splitting assembly; 210. Penta-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 reflecting film; 230. Second filter; 231. Second reflecting film; 240. Third filter; 250. Fourth filter; 251. Fourth reflecting 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 DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0025] The embodiment of the present invention provides a wave splitter, such as Figures 1 to 5 As shown, it includes a shell 10 and a wave splitter assembly 20 arranged in the shell 10, a common port 101 is formed on one side wall of the shell 10, and two side walls adjacent to the common port 101 are formed with a first receiving port 102, a second receiving port 103 and a third receiving port 104; the wave splitter assembly 20 includes a pentagonal prism 210 and a first filter 220, a second filter 230 and a third filter 240 arranged on the outer peripheral surface of the pentagonal prism 210; the optical signal enters the pentagonal prism 210 along the common port 101, enters the first filter 220 after reflection, the first filter 220 is used to filter out the optical signal of the first wavelength, and emits it along the first receiving port 102; the remaining optical signal continues to enter the second filter 230 after reflection, the second filter 230 is used to filter out the optical signal of the second wavelength, and emits it along the second receiving port 103; the remaining optical signal continues to enter the third filter 240 after reflection, the third filter 240 is used to filter out the optical signal of the third wavelength, and emits it along the third receiving port 104.

[0026] The wave splitting component 20 is arranged in the shell 10, and the optical signal can be split by the wave splitting component 20. Specifically, the wave splitting component 20 includes a pentagonal prism 210 and a first filter 220, a second filter 230, and a third filter 240 arranged on the outer peripheral surface of the pentagonal prism 210. The optical fiber is located outside the shell 10 and is arranged at the common port 101. The optical signal enters the shell 10 along the common port 101 and enters the pentagonal prism 210, and enters the first filter 220 after reflection. The first filter 220 is used to filter out the optical signal of the first wavelength and emit it along the first receiving port 102; the remaining optical signal continues to enter the second filter 230 after reflection, and the second filter 230 is used to filter out the optical signal of the second wavelength and emit it along the second receiving end; the remaining optical signal continues to enter the third filter 240 after reflection, and the third filter 240 is used to filter out the optical signal of the third wavelength and emit it along the third receiving port 104. This embodiment can realize the splitting of optical signals without the need for coupling of multiple splitters, thereby reducing the loss of optical signals and improving the reliability of splitting, while reducing the number of components and thus reducing costs.

[0027] As a preferred solution 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, and 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 both 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, and the second filter 230 is provided with a second reflecting film 231 on the side away from the pentagonal prism 210, and a second prism 50 is also provided on the first mounting surface 211, and the second prism 50 is located on the side of the second filter 230 away from the first filter 220, and a fourth filter 250 is provided on the second mounting surface 212, and a fourth reflecting film 251 is provided on the side of the fourth filter 250 away from the prism.

[0028] Reference Figures 3 to 5 , Figure 5The direction of the dotted arrow in the figure is the transmission path of the optical signal. In this embodiment, the optical signal enters the housing 10 along 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. It is reflected back to the pentagonal prism 210 by the fourth reflection film 251 set on the fourth filter 250 and reaches the second reflection surface 214. The second reflection surface 214 reflects the optical signal to the first filter 220 on the first mounting surface 211, and the optical signal of the first wavelength is filtered out by the first filter 220. The optical signal of the first wavelength is emitted along the first receiving port 102, and the wavelength division of the optical signal of the first wavelength is completed; the remaining optical signal is reflected by the first reflection film 221 set on one side of the first filter 220, and enters the fifth filter 260 set on the first reflection 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 reflection surface 213 and reaches the second filter 230 on the first mounting surface 211, and the optical signal of the second wavelength is filtered out by the second filter 230, and the optical signal of the second wavelength is emitted along the second receiving port 103, and the wavelength separation of the optical signal of the second wavelength is completed; the remaining optical signal is reflected by the second reflection film 231 set on one side of the second filter 230, and enters the sixth filter 270 set on the first reflection surface 213, and 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, and the remaining optical signal is reflected on the first reflection surface 213 and reaches the second prism 50 on the first mounting surface 211, and is reflected on the second prism 50 and reaches the third filter 240 set on the first reflection surface 213, and the optical signal of the third wavelength is filtered out by the third filter 240, and the optical signal of the third wavelength is emitted along the third receiving port 104, and the wavelength separation of the optical signal of the second wavelength is completed. The above process is the detailed wavelength separation process of the optical signal.

[0029] The wavelength splitter of this embodiment is applicable to 50G combo PON to split the upstream wavelengths 1270+ / -10nm, 1286+ / -2nm, and 1310+ / -20nm.

[0030] Among them, in actual application, the first filter 220 cannot completely filter out the optical signal of the first wavelength, and there is a very small part of the optical signal of the first wavelength in the remaining optical signal, and the above-mentioned fifth filter 260 can filter out the above-mentioned very small part of the optical signal of the first wavelength; similarly, the second filter 230 cannot completely filter out the optical signal of the second wavelength, and there is a very small part of the optical signal of the second wavelength in the remaining optical signal, and the above-mentioned sixth filter 270 can filter out the above-mentioned very small part of the optical signal of the second wavelength, the purpose is to achieve high isolation requirements on a wave splitting component 20, wherein the fifth filter 260 and the sixth filter 270 of this embodiment are coated with an absorption film on the side away from the pentagonal prism 210, which can absorb most of the crosstalk light and reduce the influence of this part of the crosstalk light on the system as stray light.

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

[0032] As a preferred solution of this embodiment, refer to Figures 1 to 3 The top of the shell 10 forms a housing cavity with an opening 110, and the wave splitter component 20 is arranged in the housing 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] When assembling the splitter of this embodiment, the splitter component 20 can be placed in the accommodating cavity through the opening 110 for easy operation, and a specific layout 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 solution of this embodiment, refer to Figure 2 and Figure 3 A transmitting port 105 is also formed on one end of the housing 10 away from the common port 101 , and the transmitting port 105 is arranged opposite to the fourth filter 250 .

[0035] Among them, the external communication device is arranged on a side of the shell 10 close to the transmitting port 105. After the light beam of the external communication device passes through the transmitting port 105 and is incident on the fourth filter 250, it is transmitted to the fourth lens 340 through the pentagonal prism 210, and then converges to the optical fiber arranged at the common port 101, thereby realizing the communication between the optical signal of the external communication device and the optical fiber.

[0036] As a preferred solution of this embodiment, refer to Figure 3 and Figure 5The housing 10 is also 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 so that the optical signal of the first wavelength, the optical signal of the second wavelength and the optical signal of the third wavelength become parallel light, thereby enhancing the intensity and brightness of the light beam, and 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 simultaneously reach the target optical power. Thus, the fourth lens 340 is fixed.

[0038] As a preferred solution of this embodiment, the first filter 220, the second filter 230, the third filter 240 and the fourth filter 250 are all fixed on the pentaangular prism 210 by 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 glue; wherein, in the process of installing the fourth lens 340 in the shell 10, the distance between the common port 101 and the incident surface 215 of the fourth lens 340 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 glue.

[0039] The mounting method in this embodiment has low mounting requirements, is easy to operate, can make the connection between the components more secure, reduces the possibility of failure, and improves the reliability of the system. The above components are fixed with UV glue.

[0040] As a preferred solution of this embodiment, refer to Figures 1 to 3 An SC connector 40 is provided on one side of the housing 10 . The SC connector 40 is fixed to the housing 10 by laser welding. The SC connector 40 is used to install an optical fiber so that an optical signal can reach the common port 101 along the optical fiber.

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

[0042] The present application also discloses a communication module, including the splitter in the above embodiment. The communication module includes the same structure and beneficial effects as the splitter in the above embodiment. The structure and beneficial effects of the splitter have been described in detail in the above embodiment, and will not be repeated here.

[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A wave splitter, characterized in that: include: A housing, wherein a common port is formed on one side wall of the housing, and a first receiving port, a second receiving port and a third receiving port are formed on two side walls adjacent to the common port; A wave splitting component is arranged in the housing, comprising a pentagonal prism and a first filter, a second filter, and a third filter arranged on the outer peripheral surface of the pentagonal prism; The optical signal enters the pentagonal prism along the common port, and enters the first filter after reflection, the first filter is used to filter out the optical signal of the first wavelength, and emits it through the first receiving port; the remaining optical signal continues to enter the second filter after reflection, the second filter is used to filter out the optical signal of the second wavelength, and emits it through the second receiving port; the remaining optical signal continues to enter the third filter after reflection, the third filter is used to filter out the optical signal of the third wavelength, and emits it through the third receiving port.

2. The splitter according to claim 1, characterized in that: The pentagonal prism comprises a first mounting surface, a second mounting surface, a first reflecting surface, a second reflecting surface and an incident surface which are connected in sequence, and the optical signal of the common port enters the pentagonal prism along the incident surface; The first filter and the second filter are both arranged on the first mounting surface, and the third filter is arranged on the first reflecting surface; A first reflective film is disposed on a side of the first filter away from the penta-prism, a second reflective film is disposed on a side of the second filter away from the penta-prism, a second prism is further disposed on the first mounting surface, and the second prism is located on a side of the second filter away from the first filter; A fourth filter is disposed on the second mounting surface, and a fourth reflective film is disposed on a side of the fourth filter away from the prism.

3. The splitter according to claim 2, characterized in that: The top of the shell forms a accommodating cavity with an opening, the wave splitting component is arranged in the accommodating 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 the other side wall of the shell.

4. The splitter according to claim 3, characterized in that: A transmitting port is also formed on a side of the housing away from the common port, and the transmitting port is arranged opposite to the fourth filter.

5. The splitter according to claim 4, characterized in that: The housing is also provided with: 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.

6. The wave splitter according to claim 5, characterized in that: A fifth filter and a sixth filter are also provided on the first reflecting surface. The fifth filter is located on the reflected light path of the first filter and is used to filter out the optical 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 optical signal of the second wavelength.

7. The wave splitter according to claim 6, characterized in that: The first lens, the second lens, the third lens and the fourth lens are collimating lenses.

8. The wave splitter according to claim 7, characterized in that: The first filter, the second filter, the third filter and the fourth filter are all fixed on the penta prism by glue, and the first lens, the second lens, the third lens and the fourth lens are fixed in the housing by glue; In the process of installing the fourth lens in the shell, the distance between the common port and the incident surface of the fourth lens 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 glue.

9. The splitter according to any one of claims 1 to 8, characterized in that: An SC connector is provided on one side of the shell. The SC connector is fixed to the shell by laser welding. The SC connector is used to install an optical fiber so that an optical signal can reach the common port along the optical fiber.

10. A communication module, characterized in that: The invention comprises the splitter as claimed in any one of claims 1 to 9.

Images