Two-in-one optical module assembly for communication

Abstract

The invention provides a two-in-one optical module assembly for communication, and relates to the field of optical fiber communication, the two-in-one optical module assembly for communication comprises an optical fiber array, an optical filter, a lens array and a corner prism, the optical fiber array comprises two input optical fibers, two collimating lenses are arranged between the optical fiber array and the optical filter, and the two collimating lenses correspond to the two input optical fibers; the optical filter comprises a substrate and four optical filters, two symmetrical substrate slopes are formed at the front end of the substrate, and the two substrate slopes correspond to the two collimating lenses respectively. Compared with the prior art, the optical module assembly adopts the two collimating lenses to correspond to the two input optical fibers in the optical fiber array, input light enters symmetrically from the two sides of the optical filter, the wavelength division multiplexing or wavelength division demultiplexing function of the optical filter is fully utilized, and the eight-channel light emitting function can be achieved through the four-channel optical filter. The storage space requirement is reduced, the product size is reduced, the high-speed and miniaturization requirements are met, and the inventory holding cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication, and particularly to a two-in-one optical module component for communication. Background Art

[0002] The technical solution of the existing conventional 8-channel optical module component is as follows Figure 1 As shown, it generally includes 2 pcs Receptacle + collimator components 10, 1 glass substrate 201, and a Z-Block 20 composed of two groups of 4 diaphragms 202 - 205, 1 pcs silicon lens array 30, 1 pcs corner prism 40, and 1 pcs base plate 50. Its manufacturing method is as follows: (1) First, use a CCD or a beam analyzer to adjust the Receptacle + collimator component according to the spot situation, and cure it with glue; (2) Use glue to mount the glass substrate 201 and the Z-Block 20 composed of two groups of diaphragms 202 - 205; (3) Use glue to mount the silicon lens array 30 and the corner prism 40; (4) Glue the components mounted in the above steps (1) and (2) onto the base plate 50; (5) Place the component in step (3) on the coupling table, use a tooling to clamp the Receptacle + collimator component 10, adjust the component to the minimum loss and fix it with glue. However, with the development of technologies such as AI, cloud computing, and big data, the computing power requirements of electronic devices are getting higher and higher, and the rate requirements for processing information are getting faster and faster. Such an optical module component with eight diaphragms occupies a large space and has a high cost, which does not meet the requirements of high speed and miniaturization of optical modules. Summary of the Invention

[0003] In view of the above problems, the present invention provides a two-in-one optical module component for communication, which adopts an optical filter with four diaphragms, reduces the storage space requirement, reduces the product volume, meets the requirements of high speed and miniaturization, can reduce the inventory holding cost, improve the capital efficiency, and meets the requirements of environmental protection.

[0004] The technical solution adopted by the present invention is as follows: A two-in-one optical module component for communication includes an optical fiber array for transmitting optical signals, an optical filter for filtering the optical signals emitted by the optical fiber array, a lens array, and a corner prism for turning the light beam passing through the lens array. The optical fiber array includes two input optical fibers. There are two collimating lenses for collimating optical signals between the optical fiber array and the optical filter, and the two collimating lenses correspond to the two input optical fibers; the optical filter includes a substrate and four filter films. Two symmetric substrate inclined surfaces are formed at the front end of the substrate, and the two substrate inclined surfaces respectively correspond to the two collimating lenses. The four filter films are arranged in sequence on the end surface of the rear end of the substrate, and the lens array is disposed opposite to the four filter films.

[0005] Preferably, the substrate is hexagonal. The front end portion of the substrate forms a first substrate inclined surface, a first substrate side surface, and a second substrate inclined surface. The first substrate inclined surface and the second substrate inclined surface are symmetrically arranged on both sides of the first substrate side surface. The first substrate inclined surface and the second substrate inclined surface respectively correspond to two collimating lenses. The rear end portion of the substrate forms a third substrate side surface, and the third substrate side surface is parallel to the first substrate side surface. Four filter films are arranged on the third substrate side surface, and the second substrate side surface and the fourth substrate side surface are respectively formed on both sides of the substrate.

[0006] More preferably, the first substrate inclined surface and the second substrate inclined surface are coated with an antireflection film, R≤0.2%@1260~1650nm, the first substrate side surface is coated with a high reflection film, R≥99.8%@1260~1650nm, and the second substrate side surface, the third substrate side surface, and the fourth substrate side surface are polished surfaces.

[0007] Preferably, the four filter films are respectively a first filter film, a second filter film, a third filter film, and a fourth filter film. The front filter film surface of each filter film opposite to the third substrate side surface is coated with a WDM film, and the rear filter film surface of each filter film opposite to the lens array is coated with an antireflection film, R≤0.2%@1260~1650nm.

[0008] Preferably, each collimating lens is a single lens, including a lens upper side surface, a lens lower side surface, a lens front end surface, and a lens rear end surface. The lens front end surface and the lens rear end surface are coated with an antireflection film, R<0.2%@1260~1650nm.

[0009] Preferably, four light transmission channels are provided in the lens array, and the front end surface and the rear end surface of the lens array are coated with an antireflection film, R<0.2%@1260~1650nm.

[0010] Preferably, a beam - collecting prism for adjusting the light transmitted in an inclined direction to be horizontally transmitted is further provided between the optical filter and the lens array. The beam - collecting prism is pentagonal. The front end portion of the beam - collecting prism forms a first prism inclined surface and a second prism inclined surface. The rear end portion of the beam - collecting prism forms a second prism side surface opposite to the front end portion of the lens array; eight light transmission channels are provided in the lens array, and the front end surface and the rear end surface of the lens array are coated with an antireflection film, R<0.2%@1260~1650nm.

[0011] Preferably, the light - emitting surface of the corner prism is coated with an antireflection film, R<0.2%@1260~1650nm.

[0012] Preferably, the fiber array, the collimating lens, the optical filter, the lens array, and the corner prism are all mounted on the bottom plate; the rear end surface of the lens array is adhesively arranged with the light - incident surface of the corner prism.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a two-in-one optical module component for communication. Two collimating lenses correspond to two input optical fibers in the optical fiber array. The input light enters the optical filter symmetrically from both sides, making full use of the wavelength division multiplexing or demultiplexing function of the optical filter. It can achieve the function of eight-channel light output with a four-channel optical filter, reducing the storage space requirement, decreasing the product volume, meeting the requirements of high speed and miniaturization, and being able to reduce the inventory holding cost and improve the capital efficiency, meeting the requirements of environmental protection. Description of the Drawings

[0014] Figure 1 It is the technical solution of the existing conventional 8-channel optical module component.

[0015] Figure 2 It is a perspective view of the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0016] Figure 3 It is a top view of the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0017] Figure 4 It is a schematic diagram of the optical fiber array in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0018] Figure 5 It is a schematic diagram of the substrate in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0019] Figure 6 It is a schematic diagram of the filter in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0020] Figure 7 It is a schematic diagram of the collimating lens in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0021] Figure 8 It is a schematic diagram of the lens array in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0022] Figure 9 It is a schematic diagram of the corner prism in the first embodiment of the two-in-one optical module component for communication provided by the present invention.

[0023] Figure 10 It is the optical path schematic diagram of the first embodiment of the two-in-one optical module component for communication provided by the present invention Figure 1 。

[0024] Figure 11 Optical path amplification diagram of the first embodiment of a two-in-one optical module component provided by the present invention.

[0025] Figure 12 Schematic diagram of the optical path of the first embodiment of a two-in-one optical module component provided by the present invention Figure 2 .

[0026] Figure 13 Schematic diagram of the second embodiment of a two-in-one optical module component provided by the present invention.

[0027] Figure 14 Top view of the second embodiment of a two-in-one optical module component provided by the present invention.

[0028] Figure 15 Schematic diagram of the converging prism in the second embodiment of a two-in-one optical module component provided by the invention.

[0029] Figure 16 Schematic diagram of the optical path of the second embodiment of a two-in-one optical module component provided by the invention Figure 1 .

[0030] Figure 17 Optical path amplification diagram of the second embodiment of a two-in-one optical module component provided by the invention.

[0031] Figure 18 Schematic diagram of the optical path of the second embodiment of a two-in-one optical module component provided by the invention Figure 2 . Specific embodiments

[0032] Specific descriptions are made for the preferred embodiments provided by the present invention according to the accompanying drawings.

[0033] Figures 2 to 12, which is the first implementation mode of a two-in-one optical module component for communication provided by the present invention. The two-in-one optical module component for communication includes an optical fiber array structure 10 for emitting optical signals, an optical filter 20 for filtering the optical signals emitted by the optical fiber array, a lens array 30, and a corner prism 40 for steering the light beam passing through the lens array. The optical fiber array structure 10 includes two input optical fibers 12. Two collimating lenses 50 for collimating the optical signals are provided between the optical fiber array 10 and the optical filter 20, and the two collimating lenses 50 correspond to the two input optical fibers 12. The optical filter 20 includes a substrate 21 and four filter films 22. Two symmetric substrate inclined surfaces 211 and 213 are formed at the front end of the substrate 21, and the two substrate inclined surfaces 211 and 213 respectively correspond to the two collimating lenses 50. The four filter films 22 are arranged in sequence on the end surface of the rear end of the substrate. The lens array 30 is arranged opposite to the four filter films 22. During use, two collimating lenses 50 are used to correspond to the two input optical fibers 12 in the optical fiber array. The light collimated by the two collimating lenses 50 enters the optical filter from the symmetric substrate inclined surfaces 211 and 213 on both sides of the optical filter, making full use of the wavelength division multiplexing or wavelength division demultiplexing function of the optical filter 20. The function of eight-channel light output can be realized by using a four-channel optical filter. The light passing through the optical filter passes through the lens array 30, and the corner prism 40 reflects the light from transmitting to the right to transmitting downward, and finally hits the photodetector. In this way, the storage space requirement is reduced, the product volume is reduced, which meets the requirements of high speed and miniaturization, and can reduce the inventory holding cost, improve the capital efficiency, and meet the requirements of environmental protection.

[0034] As Figure 4 shown, the optical fiber array structure 10 includes an optical fiber placement seat 11 and two input optical fibers 12. The light output surface 101 of the input optical fiber 12 is coated with an antireflection (AR) film, and R≤0.2%@1260~1650nm.

[0035] As Figure 5As shown, the optical filter 20 is formed by mounting a substrate 21 and four optical filters 22 using a tooling fixture. The substrate 21 of the optical filter 20 is hexagonal. The front end of the substrate 21 forms a first substrate inclined surface 211, a first substrate side surface 212, and a second substrate inclined surface 213. The first substrate inclined surface 211 and the second substrate inclined surface 213 are symmetrically arranged on both sides of the first substrate side surface 212. The first substrate inclined surface 211 and the second substrate inclined surface 213 respectively correspond to two collimating lenses 50. In this way, the light collimated by the two collimating lenses 50 enters the optical filter 20 from the first substrate inclined surface 211 and the second substrate inclined surface 213 which are symmetric on both sides of the optical filter 20. An anti-reflection (AR) film is coated on the first substrate inclined surface 211 and the second substrate inclined surface 213, R≤0.2%@1260~1650nm, where R represents reflectance, that is, the proportion of light reflected when passing through the surface of the anti-reflection film. R ≤ 0.2% means that in the wavelength range of 1260~1650nm, the reflectance does not exceed 0.2%, which means that in this wavelength range, only less than 0.2% of the incident light is reflected, and most of the light can pass through the anti-reflection film; A high-reflection (HR) film is coated on the first substrate side surface 212, R≥99.8%@1260~1650nm, where R represents reflectance, R ≥ 99.8% means that in the wavelength range of 1260~1650nm, the reflectance is at least 99.8%, which means that in this wavelength range, at least 99.8% of the incident light is reflected back, and only less than 0.2% of the light passes through the film.

[0036] The rear end of the substrate 21 forms a third substrate side surface 215. The third substrate side surface 215 is parallel to the first substrate side surface 212. The four optical filters 22 are arranged on the third substrate side surface 215. The second substrate side surface 214 and the fourth substrate side surface 216 are respectively formed on both sides of the substrate 21. The second substrate side surface 214, the third substrate side surface 215, and the fourth substrate side surface 216 are polished and are all polished surfaces.

[0037] According to the different refractive indices of the materials, the grinding angles between the first substrate inclined surface 211 and the second substrate inclined surface 213 and the first substrate side surface 212 are also different; if N-BK7 is used as the material, then the grinding angle between the first substrate inclined surface 211 and the first substrate side surface 212 is 164.36°, that is, the incident angle is 15.64°, and the grinding angle between the second substrate inclined surface 213 and the first substrate side surface 212 is also processed in the same way.

[0038] As Figure 6As shown, the four filters 22 are respectively a first filter 221, a second filter 222, a third filter 223 and a fourth filter 224. A WDM film is deposited on the front filter surface 2201 of each filter facing the side of the third substrate, and an anti-reflection (AR) film is deposited on the rear filter surface 2202 of each filter disposed opposite to the lens array, with R ≤ 0.2% @ 1260 - 1650 nm.

[0039] The optical filter 20 can be an optical filter with any coating wavelength spacing, such as LWDM, CWDM, MWDM and their combinations, etc. The optical filter 20 can be an existing optical transmitting or receiving module composed of a diaphragm as a key component, and the channel spacing is generally 0.75 mm or 0.5 mm, or a larger channel spacing, such as the channel spacing of the optical filter 20 of some optical modules is 1.5 mm. The assembly method of this structure is applicable to the optical filter 20 products with a channel spacing ≥ 0.5 mm. In this embodiment, the channel spacing of the optical filter 20 is 0.5 mm, and the product channel spacing is 0.25 mm.

[0040] As Figure 7 As shown, the collimating lens 50 is a single lens, including a lens upper surface 501, a lens lower surface 502, a lens front end face 503 and a lens rear end face 504. An anti-reflection (AR) film is deposited on the lens front end face and the lens rear end face, with R < 0.2% @ 1260 - 1650 nm. As a preferred method, the included angle between the lens upper surface 501 and the lens front end face 503 is 4 - 8°. According to different return loss requirements, the angle is different. The greater the return loss requirement, the greater the angle.

[0041] The lens array 30 is provided with four light-transmitting channels arranged side by side. According to the process application, the spacing between adjacent light-transmitting channels is 0.5 mm; an anti-reflection (AR) film is deposited on the front end face 301 and the rear end face 302 of the lens array, with R < 0.2% @ 1260 - 1650 nm, and the remaining surfaces of the lens array are polished. Theoretically, the minimum diameter of the lens array 30 can reach 0.005 mm, so it can be used in combination with a fiber array structure with any channel spacing. In this embodiment, a lens array with a 0.5 mm channel spacing used in combination with the optical filter 20 is used. The material of the lens array is diverse, some have a large refractive index, such as the commonly used Silicon (silicon lens), and some have the same material as the conventional collimator C lens, such as N-SF11.

[0042] The optical module component uses a structure in which light enters symmetrically from both sides of the optical filter 20, which can make full use of the wavelength division multiplexing or demultiplexing function of the optical filter 20 structure. It can achieve the function of eight-channel light output with a four-channel optical filter 20. And because the distance between the two channels of the same diaphragm on the optical filter 20 is very close, the same bulge on the lens array 30 can be used for beam focusing. Therefore, the function of eight-channel beam convergence can be achieved with a four-channel lens array. The two channels of the same diaphragm can use the same bulge on the lens array for beam focusing, so the channel spacing can be reduced to half of the original. That is, if the channel spacing of single-sided light input is 0.5 mm, then the channel of the optical module component is 0.25 mm, which can match the detector with a channel spacing of 0.25 mm to meet the miniaturization requirement.

[0043] The light output surface 401 of the corner prism 40 is coated with an antireflection (AR) film, R < 0.2% @ 1260~1650 nm. The remaining surfaces of the corner prism 40 are polished. The corner prism 40 is used to turn the light, that is, to reflect the light from rightward transmission to downward transmission and finally hit the photodetector.

[0044] The fiber array 10, collimating lens 50, optical filter 20, lens array 30 and corner prism 40 are all installed on the bottom plate 60, and the bottom plate 60 plays a role of fixing and supporting.

[0045] The assembly steps of the entire communication two-in-one optical module component are as follows: (1) Fix the lens array 30 and the corner prism 40 with glue through a tooling fixture; (2) Fix the substrate 21 and four filter films 22 with glue through a tooling fixture to form the optical filter 20; (3) Then fix the fiber array, optical filter 20 and bottom plate 60 with glue into a component through a tooling fixture; (4) Place the component formed in step (1) and step (2) on the coupling stage ①, place a beam analyzer or CCD camera on the right side, hold the collimating lens 50 on the left side, adjust the collimating lens 50 so that the light spot on the beam analyzer or CCD camera meets the design requirements, and fix the collimating lens 50 with glue; (5) Place the component completed in step (4) on the coupling stage ②, hold the component of the lens array 30 and the corner prism 40, and by adjusting the clamped component, make the light energy hit the photodetector and meet the parameter requirements. Finally, cure the component with glue to complete the assembly.

[0046] As Figure 10As shown, in the first implementation manner, the light propagation path is as follows: (1) Light is emitted from the two input optical fibers 12 of the optical fiber array 10 and enters the collimating lens 50; (2) After the light is emitted from the collimating lens 50, the light becomes collimated light and enters the optical filter 20, and the light entering the optical filter 20 is horizontally transmitted; (3) When it is transmitted to the corresponding channel, it is emitted from the WDM surface of the optical filter 22 of this channel; entering the lens array 30, the light will converge again and be transmitted backward. (4) The light passes through the adhesive layer and enters the corner prism 40 and is reflected and transmitted downward, and finally hits the light detection surface; (5) Since the reflection isolation degree of the optical filter 22 is not high, only 13 - 15 dB, there will be very little residual energy that will continue to be transmitted backward. If the reflection paths of the two beams of light on the upper and lower sides in the substrate 21 overlap, then part of the energy of the light transmitted from one side will be transmitted to the other side, affecting the service life of the light source on the other side of the light source, as follows Figure 11 shown; however, since the light input ends on both sides are staggered from each other, the light on one side is only in the upper half area of the WDM film surface, and the light on the other side is only in the lower half area of the WDM film, and due to the relatively small light spot, the two beams of light do not interfere with each other. For the light entering from the first substrate inclined surface 211, as long as it is ensured that the light continuing backward does not hit the second substrate inclined surface 213, then the light will be reflected out of the substrate 21 into the space, as Figure 12 shown by the dotted line part. Even if the light cannot be completely masked due to process reasons, due to the staggered light spots, after hitting the collimating lens 50 on the other side, it does not hit the appropriate area, and the light spot cannot be focused into the optical fiber. Therefore, there are two effective measures in this application to ensure that the light entering from both sides does not affect each other.

[0047] Figures 13 to 18 , which is the second implementation manner of a two-in-one optical module component for communication provided by the present invention. As Figures 13 to 18As shown in the figure, the structure of the second embodiment is similar to that of the first embodiment. In the second embodiment: A beam convergence prism 70 for adjusting the light transmitted in an inclined direction to be horizontally transmitted is further provided between the optical filter 20 and the lens array 30. The beam convergence prism 70 is pentagonal. The front end portion of the beam convergence prism forms a first prism inclined surface 701 and a second prism inclined surface 702. The rear end portion of the beam convergence prism forms a third prism side surface 703 opposite to the front end portion of the lens array 30. Eight light transmission channels corresponding to the optical filter 20 are provided in the lens array 30. In use, two collimating lenses 50 are used to correspond to two input optical fibers 12 in the optical fiber array. The light collimated by the two collimating lenses 50 enters the light from the substrate inclined surfaces 211 and 213 symmetrically on both sides of the optical filter 20, making full use of the wavelength division multiplexing or wavelength division demultiplexing function of the optical filter 20, and the function of an eight-channel light output can be realized by using a four-channel optical filter. The light passing through the optical filter 20 is adjusted by the beam convergence prism 70 to be horizontally transmitted from the inclined direction, and then passes through the corresponding light transmission channels in the lens array 30. The light is reflected by the corner prism 40 from being transmitted to the right to being transmitted downward, and finally hits the photodetector. In this way, the storage space requirement is reduced, the product volume is reduced, which meets the requirements of high speed and miniaturization, and can reduce the inventory holding cost and improve the capital efficiency, meeting the requirements of green environmental protection.

[0048] The first prism inclined surface 701, the second prism inclined surface 702, and the third prism side surface 703 of the beam convergence prism 70 are coated with an anti-reflection (AR) film, with R < 0.2% @ 1260~1650 nm. When the manufacturing material of the beam convergence prism is N-BK7, the included angles between the first prism inclined surface 701, the second prism inclined surface 702 and the horizontal reverse direction are 113.67°. According to different materials, the grinding angles of the first prism inclined surface 701 and the second prism inclined surface 702 are also different to achieve the purpose of horizontal transmission of all 8 beams of light. The front end face and the rear end face of the lens array 30 are coated with an anti-reflection (AR) film, with R < 0.2% @ 1260~1650 nm, and the remaining surfaces of the lens array 30 are polished. According to the process application, the distance between adjacent light transmission channels is 0.5 mm.

[0049] The assembly process of the miniaturized optical module component is as follows: (1) Fix the lens array 30 and the corner prism 40 with glue through a tooling fixture; (2) Fix the substrate 21 and the four filter plates 22 with glue through a tooling fixture to form an optical filter 20; (3) Then fix the fiber array, the optical filter 20 and the bottom plate 60 with glue through a tooling fixture to form a component; (4) Place the component completed in step (3) on the coupling stage ①, place a beam analyzer or a CCD camera on the right side, hold the collimating lens 50 on the left side, adjust the collimating lens 50 so that the light spot on the beam analyzer or the CCD camera meets the design requirements, and fix the collimating lens 50 with glue; (5) Place the component completed in step (4) on the coupling stage ①, place a beam analyzer or a CCD camera on the right side, hold the beam collimating prism 70, and adjust the distance between the beam collimating prism 70 and the optical filter 20 to meet the light spot spacing requirements; (6) Place the component completed in step (5) on the coupling stage ②, hold the component of the lens array 30 and the corner prism 40, and by adjusting the held component, make the light energy hit the photodetector and meet the parameter requirements, and finally cure the component with glue to complete the assembly.

[0050] In the second embodiment, the light propagation path is as Figure 16 shown: (1) Light emits from the two input optical fibers 12 of the fiber array 10 and enters the collimating lens 50; (2) After the light emits from the collimating lens 50, the light becomes collimated light and enters the optical filter 20. The light entering the optical filter 20 is horizontally transmitted; (3) When it is transmitted to the corresponding channel, it exits from the WDM surface of the channel and enters the beam collimating prism 70. Due to the refraction effect, the light coming out of the beam collimating prism 70 becomes horizontally transmitted and enters the lens array 30. The light will converge again and transmit backward. (4) The light passes through the glue layer and enters the corner prism 40 and will be reflected and transmitted downward, and finally hits the photodetection surface; (5) Since the film reflection isolation is not high, only 13 - 15 dB, there will be very little residual energy that will continue to transmit backward. If the reflection paths of the two beams of light on the upper and lower sides in the substrate 21 overlap, then part of the energy of the light transmitted from one side will be transmitted to the other side, affecting the service life of the light source on the other side of the light source, as Figure 17 shown. However, since the light inlet ends on both sides in this solution are staggered from each other, the light on one side is only in the upper half area of the WDM film surface, and the light on the other side is only in the lower half area of the WDM film. And because the light spot is relatively small, the two beams of light do not interfere with each other. For the light entering from the first substrate inclined surface 211, as long as it is ensured that the light continuing to transmit backward does not hit the second substrate inclined surface 213, then the light will be reflected out of the substrate 21 into the space, as Figure 18Even if the light cannot be completely blocked due to process reasons, the light spot will be staggered and will not hit the appropriate area after hitting the collimating lens 50 on the other side, and the light spot cannot be focused into the optical fiber. Therefore, there are two effective measures in this application to ensure that the light from both sides will not affect each other.

[0051] In summary, the technical solution of the present invention can fully and effectively achieve the above-mentioned invention purpose, and the structure and functional principle of the present invention have been fully verified in the embodiments, and can achieve the expected effect and purpose. Without departing from the principle and essence of the present invention, various changes or modifications can be made to the embodiments of the invention. Therefore, the present invention includes all replacement contents within the scope mentioned in the scope of the patent application, and any equivalent changes made within the scope of the patent application of the present invention are within the scope of the patent application of this case.

Claims

1. A two-in-one optical module assembly for communication, comprising an optical fiber array for transmitting optical signals, an optical filter for filtering the optical signals emitted by the optical fiber array, a lens array, and a corner prism for steering the light beam passing through the lens array, characterized in that: The optical fiber array includes two input optical fibers, and two collimating lenses for collimating optical signals are arranged between the optical fiber array and the optical filter, and the two collimating lenses correspond to the two input optical fibers; the optical filter includes a substrate and four filters, and two symmetrical substrate inclined surfaces are formed on the front end of the substrate, and the two substrate inclined surfaces correspond to the two collimating lenses respectively. The four filters are arranged in sequence on the end face of the rear end of the substrate, and the lens array is arranged opposite to the four filters.

2. The two-in-one optical module assembly for communication according to claim 1, characterized in that: The substrate is hexagonal, and the front end of the substrate forms a first substrate inclined surface, a first substrate side surface, and a second substrate inclined surface. The first substrate inclined surface and the second substrate inclined surface are symmetrically arranged on both sides of the first substrate side surface. The first substrate inclined surface and the second substrate inclined surface correspond to two collimating lenses respectively. The rear end of the substrate forms a third substrate side surface, and the third substrate side surface is parallel to the first substrate side surface. Four filters are arranged on the third substrate side surface, and the two sides of the substrate form the second substrate side surface and the fourth substrate side surface respectively.

3. The two-in-one optical module assembly for communication according to claim 2, characterized in that: The first substrate bevel and the second substrate bevel are coated with an anti-reflection film, R≤0.2%@1260~1650nm, the first substrate side is coated with a high reflection film, R≥99.8%@1260~1650nm, and the second substrate side, the third substrate side and the fourth substrate side are polished surfaces.

4. The two-in-one optical module assembly for communication according to claim 2, characterized in that: The four filters are respectively a first filter, a second filter, a third filter and a fourth filter. The front side of each filter opposite to the side of the third substrate is coated with a WDM film, and the rear side of each filter opposite to the lens array is coated with an anti-reflection film, R≤0.2%@1260~1650nm.

5. The two-in-one optical module assembly for communication according to claim 2, characterized in that: Each collimating lens is a single lens, including an upper side surface of the lens, a lower side surface of the lens, a front end surface of the lens and a rear end surface of the lens. The front end surface of the lens and the rear end surface of the lens are coated with an anti-reflection film, R < 0.2% @ 1260 ~ 1650nm.

6. The two-in-one optical module assembly for communication according to claim 2, characterized in that: The lens array is provided with four light transmission channels, and the front and rear faces of the lens array are coated with anti-reflection films, R < 0.2% @ 1260 ~ 1650nm.

7. The two-in-one optical module assembly for communication according to claim 1, characterized in that: A focusing prism for adjusting light transmitted in an inclined direction to horizontal transmission is also provided between the optical filter and the lens array. The focusing prism is pentagonal, and the front end of the focusing prism forms a first prism bevel and a second prism bevel, and the rear end of the focusing prism forms a second prism side surface opposite to the front end of the lens array; eight light-transmitting channels are provided in the lens array, and the front end and rear end faces of the lens array are coated with anti-reflection films, R < 0.2% @ 1260 ~ 1650nm.

8. The two-in-one optical module assembly for communication according to claim 1, characterized in that: The light-emitting surface of the corner prism is coated with an anti-reflection film, R < 0.2% @ 1260 ~ 1650nm.

9. The two-in-one optical module assembly for communication according to claim 1, characterized in that: The optical fiber array, collimating lens, optical filter, lens array and corner prism are all mounted on the bottom plate; the rear end face of the lens array is arranged to fit the light incident face of the corner prism.

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