A terraced prism, light receiving end and 1.6t 2xfr4 light engine

Abstract

The present application relates to a kind of terraced prisms, one of four side is light entrance surface, another side opposite light entrance surface is light exit surface, other two sides are first step surface and second step surface respectively, first step surface has at least four first reflection surface inclined 45 ° from high to low in turn, second step surface has at least four second reflection surface inclined 45 ° from high to low in turn.A kind of light receiving end, the light exit of Z-block component is coupled with the light entrance surface of terraced prisms, and by terraced prisms, each channel spacing is changed into 0.25 mm and is coupled into array convergence lens by light exit surface, array convergence lens is coupled with 45 ° prism, array detector in turn.A kind of 1.6T 2 × FR4 light engine includes: light receiving end.Affirmative effect is: the light path spacing is reduced from 0.5 mm to 0.25 mm, can adopt the array detector of channel spacing 0.25 mm, reduce cost.

Description

Technical Field

[0001] This invention relates to the field of optical engine technology, specifically to a terraced prism, an optical receiver, and a 1.6T 2×FR4 optical engine. Background Technology

[0002] To ensure performance, traditional 1.6T 2×FR4 optical engines typically use Z-block + filter (i.e., Z-block assembly) in their optical receivers. AWG (Aluminum Gauge) receivers, due to their high insertion loss, cannot be used in 1.6T 2×FR4 optical engines. Figure 1 , Figure 2 The scheme shown is a 1.6T 2×FR4 optical engine using Z-block components (only one optical receiver is shown in the figure; in actual applications, two optical receivers are arranged side by side). It includes: Z-block components, array converging lenses, 45° prisms, and array detectors. The light inlet of the Z-block components is coupled to an optical fiber, and a glass capillary tube is fitted at the end of the optical fiber. A collimating lens fixed to the glass capillary tube is coupled between the optical fiber and the light inlet of the Z-block components. The array converging lenses are coupled to each light outlet of the Z-block components. The 45° prisms are coupled to the array converging lenses, and the array detectors are coupled to the reflecting surface of the 45° prisms.

[0003] The problems with this solution are: the Z-blcok filter has a tilt angle, and due to cold processing, edge chipping, and glue overflow, the minimum channel spacing that Z-blcok can currently achieve is 0.5mm. However, a 0.5mm spacing presents two problems:

[0004] 1) The size is too large, making it difficult to package a 1.6T 2×FR4 light engine;

[0005] 2) Single-wavelength 200G array detectors (array PDs) are very expensive, while array detectors with a channel pitch of 0.5mm cost more than twice as much as OnNova array detectors with a channel pitch of 0.25mm.

[0006] Patent application number 2023209320141 discloses a light receiving device and an optical module, which adds two small prisms between the Z-block component and the array converging lens to solve the problem of optical channel spacing. However, since the two small prisms are very small, it is practically impossible to divide them into two prisms in a 0.25mm optical path. In other words, it is difficult to process and cannot be mass-produced. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a terraced prism, an optical receiver and a 1.6T 2×FR4 optical engine to overcome the shortcomings of the prior art.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0009] A terraced prism has four sides, one of which is the light-incident surface, another side opposite to the light-incident surface is the light-exit surface, and the other two sides are a first step surface and a second step surface, respectively. The first step surface has at least four first reflective surfaces tilted at 45° from high to low, and the second step surface has at least four second reflective surfaces tilted at 45° from high to low, with the first reflective surfaces and the second reflective surfaces being parallel.

[0010] The beneficial effects of this invention are as follows: multiple parallel lights with a spacing of 0.5 mm enter the terraced prism through the incident surface, and then are first incident on each of the first reflecting surfaces on the first step surface. The first reflecting surfaces deflect the light path by 90° and reflect it on the second reflecting surface of the second step surface. The spacing between the multiple parallel lights reflected from the first reflecting surfaces to the second reflecting surfaces becomes 0.375 mm. Then, the second reflecting surfaces deflect the light path by 90° and become parallel lights with a spacing of 0.25 mm, which are reflected towards the exit surface and finally exit the terraced prism through the exit surface.

[0011] When this terraced prism is used in an optical receiver, it is coupled between the Z-block component and the array converging lens. This allows the four parallel beams emitted from the Z-block component with a spacing of 0.5mm to be converted into four parallel beams with a spacing of 0.25mm. These beams are then sequentially coupled into the channels of the array detector after passing through the array converging lens and the 45° prism. This allows the use of an array detector with a channel spacing of 0.25mm, effectively reducing costs. At the same time, due to the reduced channel spacing, the size of the array converging lens, the 45° prism, and the array detector can all be reduced, thus reducing the overall size of the optical receiver. This reduces the packaging difficulty in the 1.6T 2×FR4 optical engine. Compared to using two small prisms, this can be achieved in a 0.25mm optical path and can be mass-produced.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the number of first reflective surfaces is four, and the number of second reflective surfaces is four.

[0014] Furthermore, an anti-reflective coating is deposited on the light-receiving surface.

[0015] Furthermore, an anti-reflective coating is deposited on the light-emitting surface.

[0016] Based on the above technical solution, the present invention also provides an optical receiver, comprising: a Z-block component, an array converging lens, a 45° prism, an array detector, and a terraced prism. The light-emitting distance between each channel in the Z-block component is 0.5 mm. Each light-emitting port of the Z-block component is coupled to the light-incident surface of the terraced prism, and the distance between each channel is reduced to 0.25 mm by the terraced prism and coupled into the array converging lens through the light-emitting surface. The array converging lens is coupled to the 45° prism, and the reflective surface of the 45° prism is coupled to the array detector. The distance between each channel of the array detector is 0.25 mm.

[0017] The further beneficial effects of adopting the above are as follows: by coupling a terraced prism between the Z-block component and the array converging lens, the four parallel beams with a spacing of 0.5mm emitted from the Z-block component can be transformed into four parallel beams with a spacing of 0.25mm. These beams are then coupled into the channels of the array detector after passing through the array converging lens and the 45° prism in sequence. This allows the use of an array detector with a channel spacing of 0.25mm, effectively reducing costs. At the same time, due to the reduced channel spacing, the size of the array converging lens, the 45° prism, and the array detector can all be reduced, thus reducing the overall size of the optical receiver and lowering the packaging difficulty in the 1.6T 2×FR4 optical engine. Compared to using two small prisms, this can be achieved in a 0.25mm optical path and can be mass-produced.

[0018] Furthermore, the array converging lens is fixed to the 45° prism.

[0019] Furthermore, the light inlet of the Z-block component is coupled to an optical fiber, and a glass capillary tube is fitted at the end of the optical fiber. A collimating lens fixed to the glass capillary tube is coupled between the optical fiber and the light inlet of the Z-block component.

[0020] Furthermore, the Z-block component has four light-emitting ports.

[0021] Based on the above technical solution, the present invention also provides a 1.6T 2×FR4 optical engine, including: a PCB board, a substrate and two optical receivers, the two optical receivers are arranged side by side, the substrate is fixed on the PCB board, the Z-block component, the terraced prism and the 45° prism in the optical receiver are respectively fixed on the substrate, and the array detector in the optical receiver is fixed on the PCB board.

[0022] The further beneficial effects of adopting the above are: due to the reduction in the size of the entire optical receiver, the packaging difficulty in the 1.6T2×FR4 optical engine is reduced, and the cost is also reduced.

[0023] Furthermore, the width of the structure formed by the two optical receivers arranged side by side is 5.61 mm. Attached Figure Description

[0024] Figure 1 This is a top view of a 1.6T 2×FR4 light engine in the prior art;

[0025] Figure 2 This is a front view of a 1.6T 2×FR4 light engine in the prior art;

[0026] Figure 3 This is a structural diagram of the terraced prism in this invention;

[0027] Figure 4 This is a structural diagram of the optical receiver in this invention;

[0028] Figure 5 This is a structural diagram of the 1.6T 2×FR4 optical engine in this invention;

[0029] Figure 6 This is a structural diagram of two optical receivers arranged side by side in this invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Terraced prism, 110. Announcement surface, 120. Exit surface, 130. First stepped surface, 131. First reflecting surface, 140. Second stepped surface, 141. Second reflecting surface, 2. Z-block assembly, 3. Array converging lens, 4. 45° prism, 5. Array detector, 6. Optical fiber, 7. Glass capillary, 8. Collimating lens, 9. PCB board, 10. Substrate. Detailed Implementation

[0032] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0033] Example 1

[0034] like Figure 3As shown, a terraced prism has four sides, one of which is the light-incident surface 110, and the other side opposite to the light-incident surface 110 is the light-exit surface 120. The light-incident surface 110 and the light-exit surface 120 are parallel. The other two sides are a first stepped surface 130 and a second stepped surface 140, respectively. That is, the first stepped surface 130 is the adjacent side of either the light-incident surface 110 or the light-exit surface 120, and the second stepped surface 140 is the adjacent side of either the light-incident surface 110 or the light-exit surface 120. The first stepped surface 130 has at least four inclined surfaces at 45° from high to low. The first reflective surface 131 typically has the same height spacing between two adjacent first reflective surfaces 131, and the distance between the reflection points of two adjacent first reflective surfaces 131 is 0.5 mm. Similarly, the second stepped surface 140 has at least four second reflective surfaces 141 inclined at 45° from high to low. Typically, the second reflective surfaces 141 typically have the same height spacing between two adjacent second reflective surfaces 141, and the distance between the reflection points of two adjacent second reflective surfaces 141 is 0.5 mm. The first reflective surfaces 131 and the second reflective surfaces 141 are parallel.

[0035] Multiple parallel beams with a spacing of 0.5 mm enter the terraced prism 1 through the light-incident surface 110. They are then incident on the first reflection surfaces 131 on the first stepped surface 130. The light path is deflected by the first reflection surfaces 131 by 90° and reflected onto the second reflection surface 141 on the second stepped surface 140. The spacing between the multiple parallel beams reflected from the first reflection surfaces 131 to the second reflection surfaces 141 becomes 0.375 mm. The light path is then deflected by the second reflection surfaces 141 by 90° and becomes parallel beams with a spacing of 0.25 mm. These beams are then reflected toward the light-exit surface 120 and finally exit the terraced prism 1 through the light-exit surface 120.

[0036] When the terraced prism 1 is applied in the optical receiver, it is coupled between the Z-block component 2 and the array converging lens 3. This allows the four parallel beams emitted from the Z-block component 2 with a spacing of 0.5mm to be converted into four parallel beams with a spacing of 0.25mm. These beams then pass sequentially through the array converging lens 3 and the 45° prism 4 before being coupled into the channels of the array detector 5. This allows the use of an array detector 5 with a channel spacing of 0.25mm, effectively reducing costs. At the same time, due to the reduced channel spacing, the sizes of the array converging lens 3, the 45° prism 4, and the array detector 5 can all be reduced, decreasing the overall size of the optical receiver. This reduces the packaging difficulty in the 1.6T 2×FR4 optical engine. Compared to using two small prisms, this can be achieved in a 0.25mm optical path and can be mass-produced.

[0037] The terraced prism 1 is integrally formed, and low-cost mold-making technologies such as PEI injection molding, glass molding, and mass production of silicon wafers can be used, resulting in low cost and good consistency.

[0038] Example 2

[0039] like Figure 3 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0040] The number of first reflective surfaces 131 is four, and the number of second reflective surfaces 141 is four. Therefore, the terraced prism 1 can be used in a four-way parallel optical path. Of course, in actual applications, the number of first reflective surfaces 131 can be five, and the number of second reflective surfaces 141 can be five. In this case, it can also be used in a four-way parallel optical path, but the terraced prism 1 becomes larger, which is not conducive to subsequent packaging.

[0041] Example 3

[0042] like Figure 3 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0043] An anti-reflection coating is deposited on the light-incident surface 110, and an anti-reflection coating is also deposited on the light-exiting surface 120.

[0044] Example 4

[0045] like Figure 4As shown, a light receiver includes: a Z-block component 2, an array converging lens 3, a 45° prism 4, an array detector 5, and a terraced prism 1 as in any of embodiments 1 to 3. The light-emitting distance between each channel in the Z-block component 2 is 0.5 mm, and each light-emitting port of the Z-block component 2 is coupled to the light-incident surface 110 of the terraced prism 1. The received light enters the Z-block component 2, and is then split into four parallel beams with a distance of 0.5 mm. These beams enter the terraced prism 1 through the light-incident surface 110, and are first incident on the first reflective surfaces 131 on the first stepped surface 130. The first reflective surfaces 131 deflect the light path by 90° and reflect it onto the second reflective surfaces 141 on the second stepped surface 140. The light is then reflected by the first reflective surfaces 131 towards the second reflective surfaces 140. The spacing between the four parallel beams from the second reflector 141 is 0.375 mm. The second reflector 141 then bends the light path by 90°, transforming it into four parallel beams with a spacing of 0.25 mm. These beams are then reflected towards the light-emitting surface 120 and finally exit the terraced prism 1 through the light-emitting surface 120 before being coupled into the array converging lens 3. In other words, the four parallel beams with a spacing of 0.5 mm emitted from the Z-block component 2 can be transformed into four parallel beams with a spacing of 0.25 mm after passing through the terraced prism 1. The array converging lens 3 is coupled to the 45° prism 4, and the reflector of the 45° prism 4 is coupled to the array detector 5. The spacing between each channel of the array detector 5 is 0.25 mm. The four parallel beams with a spacing of 0.25 mm pass sequentially through the array converging lens 3 and the 45° prism 4 before being coupled into each channel of the array detector 5.

[0046] By coupling a terraced prism 1 between the Z-block component 2 and the array converging lens 3, the four parallel beams emitted from the Z-block component 2 with a spacing of 0.5 mm can be converted into four parallel beams with a spacing of 0.25 mm. These beams are then coupled into the channels of the array detector 5 after passing through the array converging lens 3 and the 45° prism 4 in sequence. This allows the use of an array detector 5 with a channel spacing of 0.25 mm, effectively reducing costs. At the same time, due to the reduced channel spacing, the sizes of the array converging lens 3, the 45° prism 4, and the array detector 5 can all be reduced, decreasing the overall size of the optical receiver. This reduces the packaging difficulty in the 1.6T 2×FR4 optical engine. Compared to using two small prisms, this can be achieved in a 0.25 mm optical path and can be mass-produced.

[0047] Example 5

[0048] like Figure 4 As shown, this embodiment is a further improvement on embodiment 4, as detailed below:

[0049] The array converging lens 3 is fixed to the 45° prism 4, and the fixing method can be adhesive bonding.

[0050] Example 6

[0051] like Figure 4 As shown, this embodiment is a further improvement on embodiment 4 or 5, as detailed below:

[0052] The light inlet of the Z-block component 2 is coupled to the optical fiber 6. A glass capillary tube 7 is sleeved at the end of the optical fiber 6. A collimating lens 8 fixed to the glass capillary tube 7 is coupled between the optical fiber 6 and the light inlet of the Z-block component 2. That is, the light received by the optical fiber 6 is coupled into the Z-block component 2 after passing through the collimating lens 8, and is split into four paths by the Z-block component 2. In this embodiment, it is split into four paths, that is, the Z-block component 2 has four light outlets.

[0053] Example 7

[0054] like Figure 5 , Figure 6 As shown, a 1.6T 2×FR4 optical engine includes: a PCB board 9, a substrate 10, and two optical receivers as described in any of embodiments 4 to 6. The two optical receivers are arranged side by side. The substrate 10 is fixed on the PCB board 9. The Z-block component 2, the terraced prism, and the 45° prism 4 in the optical receivers are respectively fixed on the substrate 10. The array detector 5 in the optical receivers is fixed on the PCB board 9. The width of the structure formed by the two optical receivers arranged side by side is 5.61 mm.

[0055] The reduction in the overall size of the optical receiver reduces the packaging difficulty in the 1.6T 2×FR4 optical engine, while also lowering the cost.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A terraced prism characterized by, One of the four sides is the light inlet face (110), the side opposite to the light inlet face (110) is the light outlet face (120), the other two sides are the first stepped face (130) and the second stepped face (140), the first stepped face (130) has at least four first reflecting faces (131) with an inclination of 45° from high to low, the second stepped face (140) has at least four second reflecting faces (141) with an inclination of 45° from high to low, the first reflecting faces (131) are parallel to the second reflecting faces (141); The parallel light with a multi-path distance of 0.5 mm enters the terrace prism through the light inlet face (110), is first reflected on the first reflecting faces (131) on the first stepped face (130), is reflected on the second reflecting faces (141) on the second stepped face (140) after being turned 90° by the first reflecting faces (131), the multi-path parallel light reflected by the first reflecting faces (131) to the second reflecting faces (141) has a distance of 0.375 mm, and then is turned 90° by the second reflecting faces (141) to become parallel light with a distance of 0.25 mm and is reflected to the light outlet face (120), finally is emitted from the light outlet face (120) of the terrace prism, and the terrace prism is integrally formed.

2. A terraced prism according to claim 1, wherein, The number of the first reflecting faces (131) is four, and the number of the second reflecting faces (141) is four.

3. A terraced prism according to claim 1, wherein, The light inlet face (110) is coated with an anti-reflection film.

4. A terraced prism according to claim 1, wherein The light outlet face (120) is coated with an anti-reflection film.

5. An optical receiving end, characterized by It comprises: A Z-block assembly (2), an array converging lens (3), a 45° prism (4), an array detector (5) and the terrace prism, the light outlet distance of each channel of the Z-block assembly (2) is 0.5 mm, each light outlet of the Z-block assembly (2) is coupled with the light inlet face (110) of the terrace prism, the distance between each channel is changed to 0.25 mm by the terrace prism, is coupled into the array converging lens (3) through the light outlet face (120), the array converging lens (3) is coupled with the 45° prism (4), the reflecting face of the 45° prism (4) is coupled with the array detector (5), and the distance between each channel of the array detector (5) is 0.25 mm.

6. The optical receiving terminal according to claim 5, wherein The array converging lens (3) is fixed with the 45° prism (4).

7. The optical receiving terminal according to claim 5, wherein The light inlet of the Z-block assembly (2) is coupled with an optical fiber (6), the end of the optical fiber (6) is sleeved with a glass capillary (7), and a collimating lens (8) fixed with the glass capillary (7) is coupled between the optical fiber (6) and the light inlet of the Z-block assembly (2).

8. The optical receiving terminal according to claim 5, wherein The Z-block assembly (2) has four light outlets.

9. A 1.6T 2 x FR4 light engine characterized in that, It comprises: PCB board (9), substrate (10) and two light receiving ends as claimed in any one of claims 5-8, the two light receiving ends are distributed side by side, the substrate (10) is fixed on the PCB board (9), the Z-block assembly (2), the terrace prism and the 45° prism (4) in the light receiving end are respectively fixed on the substrate (10), and the array detector (5) in the light receiving end is fixed on the PCB board (9).

10. A 1.6T 2 x FR4 light engine according to claim 9, wherein, The width of the structure formed after the two light receiving ends are distributed side by side is 5.61 mm.

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