Optical receiving end and 1.6T 2x FR4 optical engine

Abstract

The application relates to an optical receiving end, a light-emitting side of a Z-block assembly is coupled with a concave mirror fixed therewith, an array detector is arranged below the concave mirror, the interval between two adjacent channels in the array detector is 0.25 mm, the concave mirror is provided with a first reflecting concave surface, a second reflecting concave surface, a third reflecting concave surface and a fourth reflecting concave surface which are distributed in a tilt manner and are coupled with four light-emitting ports of the Z-block assembly one by one, the first reflecting concave surface, the second reflecting concave surface, the third reflecting concave surface and the fourth reflecting concave surface respectively turn the four horizontal collimated lights with an interval of 0.5 mm emitted from the Z-block assembly in the vertical direction and the horizontal direction and converge on the light-sensitive surfaces of four channels of the array detector. A 1.6T 2xFR4 light engine comprises two optical receiving ends. The beneficial effects are as follows: the cost is effectively reduced, the size of the optical receiving end is small, and the packaging difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of optical engine technology, specifically to 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 a Z-block component scheme (only one optical receiver is shown in the figure; in actual applications, two optical receivers are arranged side by side). It includes: a Z-block component, an array converging lens, a 45° prism, and an array detector. The light inlet of the Z-block component is coupled to an optical fiber. 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. The array converging lens is coupled to each light outlet of the Z-block component. The 45° prism is coupled to the array converging lens. The array detector is coupled to the reflecting surface of the 45° prism.

[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 channel spacing of the array converging lens, 45° prism and array detector is 0.5mm, so the overall size of the optical receiver is too large, which makes it difficult to package the 1.6T 2×FR4 optical engine.

[0005] 2) Single-wavelength 200G array detectors (array PDs) are very expensive, and array detectors with a channel pitch of 0.5mm are more than twice as expensive as array detectors with a channel pitch of 0.25mm. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an optical receiver and a 1.6T 2×FR4 optical engine to overcome the shortcomings of the prior art.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] An optical receiver includes a Z-blcok component and an array detector. A concave mirror is coupled to the light-emitting side of the Z-blcok component and fixed thereto. The array detector is located below the concave mirror. The spacing between two adjacent channels in the array detector is 0.25 mm. The concave mirror has a first reflective concave surface, a second reflective concave surface, a third reflective concave surface, and a fourth reflective concave surface that are obliquely distributed and coupled to the four light-emitting ports of the Z-blcok component, respectively. The first reflective concave surface, the second reflective concave surface, the third reflective concave surface, and the fourth reflective concave surface respectively deflect four horizontally collimated beams with a spacing of 0.5 mm emitted from the Z-blcok component in the vertical and horizontal directions and then converge them onto the photosensitive surfaces of the four channels of the array detector.

[0009] The beneficial effects of this invention are as follows: A concave reflector is introduced, and a first, second, third, and fourth reflecting concave surface are designed on it. These four surfaces converge the horizontally collimated light and also redirect it in both the vertical and horizontal directions. The vertical redirection tilts the horizontally collimated light of the Z-blcok component downwards, while the horizontal redirection tilts the light with a 0.5mm spacing towards the center. The combined effect results in a 0.25mm spacing between the four converging points, allowing for compatibility with a 0.25mm spacing array detector. Since 0.25mm spacing array detectors are inexpensive, this effectively reduces costs. Furthermore, the width of the concave reflector is smaller than that of the array converging lens and 45° reflecting prism in existing technologies, thus reducing the overall size of the light receiver and lowering the cost per 1.6T. The packaging difficulty in the 2×FR4 optical engine is that the concave reflector also has the following functions: it can make the collimated light a converging point (equivalent to an array of converging lenses) and can redirect the light path (equivalent to a 45° reflecting prism).

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the distance from the reflection point of the first reflective concave surface to the photosensitive surface of the first channel of the array detector is the same as the distance from the reflection point of the fourth reflective concave surface to the photosensitive surface of the fourth channel of the array detector. The radius of curvature of the first reflective concave surface is the same as that of the fourth reflective concave surface. The first and fourth reflective concave surfaces are mirror images of each other with the center line between the second and third channels as the line of symmetry. The distance from the reflection point of the second reflective concave surface to the photosensitive surface of the second channel of the array detector is the same as the distance from the reflection point of the third reflective concave surface to the photosensitive surface of the third channel of the array detector. The radius of curvature of the second reflective concave surface is the same as that of the third reflective concave surface. The second and third reflective concave surfaces are mirror images of each other with the center line between the second and third channels as the line of symmetry.

[0012] Furthermore, the distance between the reflection point of the first reflective concave surface and the photosensitive surface of the first channel of the array detector is 0.5 mm, and the radius of curvature of the first reflective concave surface is 1 mm; the distance between the reflection point of the fourth reflective concave surface and the photosensitive surface of the fourth channel of the array detector is 0.5 mm, and the radius of curvature of the fourth reflective concave surface is 1 mm; the distance between the reflection point of the second reflective concave surface and the photosensitive surface of the second channel of the array detector is 0.33 mm, and the radius of curvature of the second reflective concave surface is 0.66 mm; the distance between the reflection point of the third reflective concave surface and the photosensitive surface of the third channel of the array detector is 0.33 mm, and the radius of curvature of the third reflective concave surface is 0.66 mm.

[0013] Furthermore, the angle between the reflection direction of the first reflective concave surface and the horizontal direction is 128.58°, and the angle between the reflection direction of the first reflective concave surface and the vertical direction is 105°; the angle between the reflection direction of the fourth reflective concave surface and the horizontal direction is -128.58°, and the angle between the reflection direction of the fourth reflective concave surface and the vertical direction is -105°; the angle between the reflection direction of the second reflective concave surface and the horizontal direction is 156.61°, and the angle between the reflection direction of the second reflective concave surface and the vertical direction is 105°; the angle between the reflection direction of the third reflective concave surface and the horizontal direction is -156.61°, and the angle between the reflection direction of the third reflective concave surface and the vertical direction is -105°.

[0014] The beneficial effects of the above-mentioned steps are that the optical path spacing can be changed from 0.5mm to 0.25mm, thereby enabling the Z-blcok component with a spacing of 0.5mm to be used in conjunction with the array detector with a spacing of 0.25mm.

[0015] Furthermore, the concave mirror at least partially covers the array detector.

[0016] The further beneficial effect of adopting the above is that it can protect the array detector from being accidentally touched and thus damaged.

[0017] Furthermore, the concave mirror is bonded and fixed to the upper surface of the Z-blcok in the Z-blcok assembly, and covers the filter in the Z-blcok assembly.

[0018] The further beneficial effect of adopting the above is that it can protect the filter from accidental contact and damage.

[0019] Furthermore, the light inlet of the Z-blcok component is coupled to an optical fiber, and a collimating lens is coupled between the optical fiber and the light inlet of the Z-blcok component.

[0020] Furthermore, a glass capillary tube is fitted over the end of the optical fiber, and the collimating lens is fixed to the glass capillary tube.

[0021] Based on the above technical solution, the present invention also provides a 1.6T 2×FR4 optical engine, comprising: two optical receivers arranged side by side.

[0022] The further beneficial effects of adopting the above are: low cost, small size of optical receiver, and reduced packaging difficulty of 1.6T 2×FR4 optical engine.

[0023] Furthermore, the 1.6T 2×FR4 optical engine also includes: a PCB board and a substrate fixed on the PCB board, the Z-blcok component in the optical receiver is fixed on the substrate, and the array detector in the optical receiver is fixed on the PCB board. 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 top view of the optical receiver in this invention;

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

[0028] Figure 5 This is the optical path diagram of the optical receiver in this invention;

[0029] Figure 6 This is a top view of the 1.6T 2×FR4 optical engine in this invention;

[0030] Figure 7 This is a front view of the 1.6T 2×FR4 light engine in this invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Optical receiver, 110. Z-blcok assembly, 111. Z-blcok, 112. Filter, 120. Array detector, 130. Concave mirror, 131. First reflecting concave surface, 132. Second reflecting concave surface, 133. Third reflecting concave surface, 134. Fourth reflecting concave surface, 140. Optical fiber, 150. Collimating lens, 160. Glass capillary tube, 2. PCB board, 3. Substrate. Detailed Implementation

[0033] 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.

[0034] Example 1

[0035] like Figure 3 , Figure 4 , Figure 5 As shown, an optical receiver includes:

[0036] In this embodiment, the Z-blcok component 110 and the array detector 120 are described. The Z-blcok component 110 has four light-emitting channels, and the spacing between two adjacent light-emitting channels is 0.5 mm, which is consistent with the prior art. The array detector 120 has four channels, and the spacing between two adjacent channels is 0.25 mm. A concave reflector 130 is coupled to the light-emitting side of the Z-blcok component 110. The concave reflector 130 is fixed to the Z-blcok component 110, and the array detector 120 is located below the concave reflector 130. The term "below" is used to describe the location from the perspective shown in the figure.

[0037] The concave mirror 130 has a first reflective concave surface 131, a second reflective concave surface 132, a third reflective concave surface 133, and a fourth reflective concave surface 134, which are inclinedly distributed. The first reflective concave surface 131 is coupled to the light outlet of the first light outlet channel in the Z-blcok assembly 110, the second reflective concave surface 132 is coupled to the light outlet of the second light outlet channel in the Z-blcok assembly 110, the third reflective concave surface 133 is coupled to the light outlet of the third light outlet channel in the Z-blcok assembly 110, and the fourth reflective concave surface 134 is coupled to... The fourth light-emitting channel in the Z-blcok component 110 is coupled to the light-emitting port, that is, the first reflective concave surface 131, the second reflective concave surface 132, the third reflective concave surface 133, and the fourth reflective concave surface 134 are respectively coupled to the four light-emitting ports of the Z-blcok component 110; the first reflective concave surface 131, the second reflective concave surface 132, the third reflective concave surface 133, and the fourth reflective concave surface 134 respectively reflect the four horizontally collimated light rays with a spacing of 0.5 mm emitted from the Z-blcok component 110 in the vertical direction and the water. After being redirected in the horizontal direction, the light converges onto the photosensitive surfaces of the four channels of the array detector 120. This can be understood as follows: the first reflective concave surface 131 simultaneously redirects the horizontally collimated light emitted from the light outlet of the first light-emitting channel of the Z-blcok component 110 in both the vertical and horizontal directions, converging it onto the photosensitive surface of the first channel of the array detector 120; the second reflective concave surface 132 simultaneously redirects the horizontally collimated light emitted from the light outlet of the second light-emitting channel of the Z-blcok component 110 in both the vertical and horizontal directions, converging it onto the photosensitive surface of the first channel of the array detector 120. On the photosensitive surface of the second channel of the array detector 120, the third reflective concave surface 133 simultaneously deflects the horizontally collimated light emitted from the light outlet of the third light outlet channel of the Z-blcok component 110 in both the vertical and horizontal directions, and then converges it onto the photosensitive surface of the third channel of the array detector 120; the fourth reflective concave surface 134 simultaneously deflects the horizontally collimated light emitted from the light outlet of the fourth light outlet channel of the Z-blcok component 110 in both the vertical and horizontal directions, and then converges it onto the photosensitive surface of the fourth channel of the array detector 120.

[0038] Since the spacing between two adjacent channels in the four channels of the array detector 120 is 0.25 mm, and the spacing between two adjacent light output channels in the four light output channels of the Z-blcok component 110 is 0.5 mm, taking the illustrated viewpoint as an example, the first reflective concave surface 131 redirects the horizontal collimated light towards the photosensitive surface of the first channel of the array detector 120 in both the vertical and horizontal directions; the second reflective concave surface 132 redirects the horizontal collimated light towards the photosensitive surface of the second channel of the array detector 120 in both the vertical and horizontal directions; the third reflective concave surface 133 redirects the horizontal collimated light towards the photosensitive surface of the third channel of the array detector 120 in both the vertical and horizontal directions; and the fourth reflective concave surface 134 redirects the horizontal collimated light towards the photosensitive surface of the fourth channel of the array detector 120 in both the vertical and horizontal directions. That is, the four light paths between the concave reflector 130 and the array detector 120 are in a beam shape, and the beam end is close to the array detector 120.

[0039] The first reflecting concave surface 131, the second reflecting concave surface 132, the third reflecting concave surface 133, and the fourth reflecting concave surface 134 can converge horizontally collimated light and also redirect the horizontally collimated light in both the vertical and horizontal directions. The vertical redirection can tilt the horizontally collimated light of the Z-blcok component 110 downwards, while the horizontal redirection can tilt the light with a 0.5mm spacing towards the center. The two work together to make the spacing between the four converging points 0.25mm, which can be matched with the array detector 120 with a spacing of 0.25mm.

[0040] A concave mirror 130 is introduced, and a first reflecting concave surface 131, a second reflecting concave surface 132, a third reflecting concave surface 133, and a fourth reflecting concave surface 134 are designed on the concave mirror 130. Then, the first reflecting concave surface 131, the second reflecting concave surface 132, the third reflecting concave surface 133, and the fourth reflecting concave surface 134 not only converge the horizontally collimated light, but also deflect the horizontally collimated light in both the vertical and horizontal directions. The vertical deflection causes the horizontally collimated light of the Z-blcok component 110 to tilt downwards. The horizontal deflection causes the light with a 0.5mm spacing to tilt and turn towards the center. The two work together to make the spacing between the four converging points 0.25mm, which can match the array detector 120 with a spacing of 0.25mm. The array detector 120 with a spacing of 0.25mm is inexpensive, so the cost is effectively reduced. At the same time, the width of the concave mirror 130 can be smaller than the width of the array converging lens and the 45° reflecting prism in the prior art, so the size of the entire light receiver 1 can be reduced, thereby reducing the packaging difficulty in the 1.6T 2×FR4 optical engine. The concave mirror 130 also has the following functions: it can make the collimated light become a converging point (equivalent to the array converging lens) and it can deflect the light path (equivalent to the 45° reflecting prism).

[0041] Example 2

[0042] like Figure 3 , Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0043] The distance between the reflection point of the first reflective concave surface 131 and the photosensitive surface of the first channel of the array detector 120 is the same as the distance between the reflection point of the fourth reflective concave surface 134 and the photosensitive surface of the fourth channel of the array detector 120. The radius of curvature of the first reflective concave surface 131 is the same as the radius of curvature of the fourth reflective concave surface 134. The first reflective concave surface 131 and the fourth reflective concave surface 134 can be understood as mirror images of each other with the center line of the second channel and the third channel as the symmetrical line. The distance between the reflection point of the second reflective concave surface 132 and the photosensitive surface of the second channel of the array detector 120 is the same as the distance between the reflection point of the third reflective concave surface 133 and the photosensitive surface of the third channel of the array detector 120. The radius of curvature of the second reflective concave surface 132 is the same as the radius of curvature of the third reflective concave surface 133. The second reflective concave surface 132 and the third reflective concave surface 133 can be understood as mirror images of each other with the center line of the second channel and the third channel as the symmetrical line.

[0044] Furthermore, the distance between the reflection point of the first reflective concave surface 131 and the photosensitive surface of the first channel of the array detector 120 is 0.5 mm, and the radius of curvature of the first reflective concave surface 131 is 1 mm. The calculation method is as follows: Focal length F = radius of curvature / 2, where the focal length is the distance between the reflection point of the first reflective concave surface 131 and the photosensitive surface of the first channel of the array detector 120; the distance between the reflection point of the fourth reflective concave surface 134 and the photosensitive surface of the fourth channel of the array detector 120 is 0.5 mm, and the radius of curvature of the fourth reflective concave surface 134 is 1 mm. The calculation method is as follows: The calculation method is the same as described above, so it will not be described in detail here; the distance between the reflection point of the second reflective concave surface 132 and the photosensitive surface of the second channel of the array detector 120 is 0.33 mm, and the radius of curvature of the second reflective concave surface 132 is 0.66 mm. The calculation method is the same as described above, so it will not be described in detail here; the distance between the reflection point of the third reflective concave surface 133 and the photosensitive surface of the third channel of the array detector 120 is 0.33 mm, and the radius of curvature of the third reflective concave surface 133 is 0.66 mm. The calculation method is the same as described above, so it will not be described in detail here.

[0045] The reflection direction of the first reflective concave surface 131 makes an angle of 128.58° with the horizontal direction, and the reflection direction of the first reflective concave surface 131 makes an angle of 105° with the vertical direction; the reflection direction of the fourth reflective concave surface 134 makes an angle of -128.58° with the horizontal direction (the positive and negative values ​​of the horizontal angle are defined according to the different orientations relative to the horizontal line, for example: with...). Figure 1Taking the shown viewpoint as an example, the first reflecting concave surface 131 deflects the light path upward, defined as positive; the fourth reflecting concave surface 134 deflects the light path downward, defined as negative (and so on). The angle between the reflection direction of the fourth reflecting concave surface 134 and the vertical direction is -105° (the positive and negative angles in the vertical direction are defined by the different orientations relative to the perpendicular line); the angle between the reflection direction of the second reflecting concave surface 132 and the horizontal direction is 156.61°, and the angle between the reflection direction of the second reflecting concave surface 132 and the vertical direction is 105°; the angle between the reflection direction of the third reflecting concave surface 133 and the horizontal direction is -156.61°, and the angle between the reflection direction of the third reflecting concave surface 133 and the vertical direction is -105°.

[0046] The optical path spacing can be changed from 0.5mm to 0.25mm, so that the Z-blcok component 110 with a spacing of 0.5mm and the array detector 120 with a spacing of 0.25mm can be used together.

[0047] Of course, when the concave reflector 130 is applied to emitted light, the converging light can also be converted into collimated light, that is, the optical path is reversible.

[0048] Example 3

[0049] like Figure 3 , Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0050] The concave reflector 130 covers at least a portion of the array detector 120, which can protect the array detector 120 from accidental contact and damage.

[0051] Example 4

[0052] like Figure 3 , Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 1, 2, or 3, as detailed below:

[0053] The concave reflector 130 is bonded and fixed to the upper surface of the Z-blcok 111 in the Z-blcok assembly 110 and covers the filter 112 in the Z-blcok assembly 110. This protects the filter 112 from accidental contact and damage.

[0054] Example 5

[0055] like Figure 3 , Figure 4 , Figure 5As shown, this embodiment is a further improvement on embodiment 1, 2, 3, or 4, as detailed below:

[0056] The light inlet of the Z-blcok component 110 is coupled to the optical fiber 140. A collimating lens 150 is coupled between the optical fiber 140 and the light inlet of the Z-blcok component 110. A glass capillary tube 160 is fitted at the end of the optical fiber 140. The collimating lens 150 is fixed to the glass capillary tube 160. That is, the light received by the optical fiber 140 is coupled into the Z-blcok component 110 after passing through the collimating lens 150, and is split into four paths by the Z-blcok component 110.

[0057] In the above embodiments, the concave reflector 130 can be made of metal.

[0058] Example 6

[0059] like Figures 3-7 As shown, a 1.6T 2×FR4 optical engine includes two optical receivers 1 as described in any of the embodiments 1 to 5, with the two optical receivers 1 arranged side by side.

[0060] Furthermore, the 1.6T 2×FR4 optical engine also includes: a PCB board 2 and a substrate 3 fixed on the PCB board 2, the Z-blcok component 110 in the optical receiver 1 is fixed on the substrate 3, and the array detector 120 in the optical receiver 1 is fixed on the PCB board.

[0061] 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. An optical receiver, characterized in that, include: The Z-blcok component (110) and array detector (120) are described. A concave mirror (130) is coupled to the light-emitting side of the Z-blcok component (110) and fixed thereto. The array detector (120) is located below the concave mirror (130). The spacing between two adjacent channels in the array detector (120) is 0.25 mm. The concave mirror (130) has obliquely distributed sections that are coupled to the four light-emitting ports of the Z-blcok component (110) one by one. A first reflective concave surface (131), a second reflective concave surface (132), a third reflective concave surface (133), and a fourth reflective concave surface (134) are provided. The first reflective concave surface (131), the second reflective concave surface (132), the third reflective concave surface (133), and the fourth reflective concave surface (134) respectively redirect the four horizontally collimated beams with a spacing of 0.5 mm emitted from the Z-blcok component (110) in the vertical and horizontal directions and then converge them onto the photosensitive surfaces of the four channels of the array detector (120).

2. The optical receiver according to claim 1, characterized in that, The distance between the reflection point of the first reflective concave surface (131) and the photosensitive surface of the first channel of the array detector (120) is the same as the distance between the reflection point of the fourth reflective concave surface (134) and the photosensitive surface of the fourth channel of the array detector (120). The radius of curvature of the first reflective concave surface (131) is the same as the radius of curvature of the fourth reflective concave surface (134). The first reflective concave surface (131) and the fourth reflective concave surface (134) are mirror images of each other with the center line between the second channel and the third channel as the symmetrical line. The distance between the reflection point of the second reflective concave surface (132) and the photosensitive surface of the second channel of the array detector (120) is the same as the distance between the reflection point of the third reflective concave surface (133) and the photosensitive surface of the third channel of the array detector (120). The radius of curvature of the second reflective concave surface (132) is the same as the radius of curvature of the third reflective concave surface (133). The second reflective concave surface (132) and the third reflective concave surface (133) are mirror images of each other with the center line between the second channel and the third channel as the symmetrical line.

3. An optical receiver according to claim 2, characterized in that, The distance between the reflection point of the first reflective concave surface (131) and the photosensitive surface of the first channel of the array detector (120) is 0.5 mm, and the radius of curvature of the first reflective concave surface (131) is 1 mm; the distance between the reflection point of the fourth reflective concave surface (134) and the photosensitive surface of the fourth channel of the array detector (120) is 0.5 mm, and the radius of curvature of the fourth reflective concave surface (134) is 1 mm; the distance between the reflection point of the second reflective concave surface (132) and the photosensitive surface of the second channel of the array detector (120) is 0.33 mm, and the radius of curvature of the second reflective concave surface (132) is 0.66 mm; the distance between the reflection point of the third reflective concave surface (133) and the photosensitive surface of the third channel of the array detector (120) is 0.33 mm, and the radius of curvature of the third reflective concave surface (133) is 0.66 mm.

4. An optical receiver according to claim 1, 2, or 3, characterized in that, The first reflective concave surface (131) has a reflection direction with an angle of 128.58° to the horizontal direction and an angle of 105° to the vertical direction; the fourth reflective concave surface (134) has a reflection direction with an angle of -128.58° to the horizontal direction and an angle of -105° to the vertical direction; the second reflective concave surface (132) has a reflection direction with an angle of 156.61° to the horizontal direction and an angle of 105° to the vertical direction; the third reflective concave surface (133) has a reflection direction with an angle of -156.61° to the horizontal direction and an angle of -105° to the vertical direction.

5. An optical receiver according to claim 1, characterized in that, The concave mirror (130) at least covers a portion of the array detector (120).

6. An optical receiver according to claim 1, characterized in that, The concave mirror (130) is bonded and fixed to the upper surface of the Z-blcok (111) in the Z-blcok assembly (110) and covers the filter (112) in the Z-blcok assembly (110).

7. An optical receiver according to claim 1, characterized in that, The light inlet of the Z-blcok component (110) is coupled to an optical fiber (140), and a collimating lens (150) is coupled between the optical fiber (140) and the light inlet of the Z-blcok component (110).

8. An optical receiver according to claim 7, characterized in that, A glass capillary tube (160) is sleeved at the end of the optical fiber (140), and the collimating lens (150) is fixed to the glass capillary tube (160).

9. A 1.6T 2×FR4 light engine, characterized in that, include: Two optical receivers as described in any one of claims 1 to 8, the two optical receivers being arranged side by side.

10. A 1.6T 2×FR4 light engine according to claim 9, characterized in that, Also includes: The PCB board (2) and the substrate (3) fixed on the PCB board (2) are provided. The Z-blcok component (110) in the optical receiver is fixed on the substrate (3), and the array detector (120) in the optical receiver is fixed on the PCB board.

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