An optical receiver, a 1.6T FR4 optical module, and a coupling method.

Abstract

This invention relates to an optical receiver. A collimator is coupled to the input port of a Z-block component. A 45° reflecting prism is disposed on the output side of the Z-block component. An array detector is disposed below the reflecting surface of the 45° reflecting prism. A second dual-channel array converging lens is coupled between the reflecting surface of the 45° reflecting prism and channels three and four of the array detector. Channels three and four of the Z-block component are coupled to channels three and four of the array detector sequentially via the 45° reflecting prism and the second dual-channel array converging lens. Channels one and two of the Z-block component are coupled to channels one and two of the array detector sequentially via a first dual-channel array converging lens and the 45° reflecting prism. A 1.6T FR4 optical module includes an optical receiver. The beneficial effect is that it can ensure that all four channels of the array detector are coupled to the maximum simultaneously, thereby ensuring the performance of the optical receiver and significantly improving the yield.

Description

Technical Field

[0001] This invention relates to the field of optical module technology, specifically to an optical receiver, a 1.6T FR4 optical module, and a coupling method. Background Technology

[0002] To ensure performance, the mainstream optical receiver structure of a common 1.6T FR4 optical module typically includes: a Z-block assembly, a four-channel array focusing lens, a 45° reflecting prism, an array detector, a collimator, a glass capillary, and optical fiber. The collimator is coupled to the input port of the Z-block assembly. The Z-block assembly includes a Z-block and multiple filters sequentially fixed to the output surface of the Z-block. The collimator is fixed to the end of the glass capillary, and an optical fiber coupled to the collimator is fixed inside the glass capillary. External light is coupled into the Z-block assembly sequentially through the optical fiber and the collimator. A 45° reflecting prism is positioned on the output side of the Z-block assembly. A four-channel array focusing lens, bonded to the input side of the 45° reflecting prism, is coupled between the Z-block assembly and the 45° reflecting prism. An array detector is positioned below the reflecting surface of the 45° reflecting prism. The specific structure is as follows: Figure 1 , Figure 2 As shown, the array detector (optical chip or PD) has four channels, and the Z-block component also has four channels. The wavelengths of light emitted from the four channels of the Z-block component are different. In this scheme, due to the high speed, the photosensitive surface of each channel of the array detector is small, the Z-block component (Z-block + filter) has processing errors (especially angle errors), and the number of reflections of light in the four channels of the Z-block component is different (channel 1 reflects once, channel 2 reflects three times, channel 3 reflects five times, and channel 4 reflects seven times). This causes some channels 1, 2, 3, and 4 of the array detector to not be coupled to the maximum at the same time, thus affecting the yield of the optical receiver. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an optical receiver, a 1.6T FR4 optical module and a coupling method to overcome the shortcomings of the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0005] An optical receiver includes: a Z-block component and a collimator coupled to the light inlet of the Z-block component; a 45° reflecting prism is disposed on the light-emitting side of the Z-block component; an array detector is disposed below the reflecting surface of the 45° reflecting prism; a second dual-channel array converging lens is coupled between the reflecting surface of the 45° reflecting prism and channel three and channel four of the array detector; channel three and channel four of the Z-block component are coupled to channel three and channel four of the array detector sequentially via the 45° reflecting prism and the second dual-channel array converging lens; and channel one and channel two of the Z-block component are coupled to channel one and channel two of the array detector sequentially via the first dual-channel array converging lens and the 45° reflecting prism.

[0006] The beneficial effects of this invention are as follows: By splitting a four-channel array converging lens into two dual-channel array converging lenses and coupling them at different positions, each corresponds to one of the two channels of the array detector. The principle is as follows: the second dual-channel array converging lens, located below the reflective surface of the 45° reflecting prism, has a short focal length, while the first dual-channel array converging lens, located between the Z-block component and the 45° reflecting prism, has a long focal length. This changes the focal length of the converging lens compared to a four-channel array converging lens, ensuring that the focal point of the corresponding channel can be on the photosensitive surface of each channel of the array detector. Therefore, even with high speeds, small photosensitive surfaces of each channel of the array detector, manufacturing errors in the Z-block component 1, and different reflection times of light in the four channels of the Z-block component, it can still be ensured that channels one, two, three, and four of the array detector can be coupled to the maximum simultaneously, thereby ensuring the performance of the light receiver and significantly improving the yield.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the second dual-channel array converging lens is fixed to the 45° reflecting prism by adhesive bonding.

[0009] Furthermore, the collimator is fixed at the end of the glass capillary, and an optical fiber coupled to the collimator is fixed inside the glass capillary.

[0010] Furthermore, the Z-block component includes: a Z-block and multiple filters that are sequentially fixed to the light-emitting surface of the Z-block.

[0011] Furthermore, the collimator is a collimating lens.

[0012] Based on the above technical solution, the present invention also provides a 1.6T FR4 optical module, comprising: two optical receivers as described above.

[0013] The further beneficial effects of adopting the above are: it can guarantee the performance of the 1.6T FR4 optical module and significantly improve the yield.

[0014] Furthermore, each of the four channels in the optical receiver has a single-channel wavelength of 200G.

[0015] Furthermore, the Z-block component, the first dual-channel array converging lens, and the 45° reflecting prism are fixed on the substrate, which is fixed on the PCB board, and the array detector is fixed on the PCB board.

[0016] Based on the above technical solution, the present invention also provides an optical receiver coupling method for coupling the optical receiver, the steps of which are as follows:

[0017] S100, respectively fix a 45° reflecting prism and an array detector;

[0018] S200: A high-precision pick-and-place machine is used to align and fix the second dual-channel array converging lens with the photosensitive surfaces of channel three and channel four of the array detector.

[0019] S300. Connect an external galvanometer to each of the four channels of the array detector, couple the collimator and Z-block assembly, and couple the external light source into the Z-block assembly through the collimator. The light emitted from channels three and four of the Z-block assembly is coupled into channels three and four of the array detector through a 45° reflecting prism and a second dual-channel array converging lens, respectively. Observe the response photocurrent of the galvanometers connected to channels three and four of the array detector. The position of the collimator and Z-block assembly when the response photocurrent is at its maximum is the optimal coupling position. Fix the collimator and Z-block assembly respectively.

[0020] S400, couple the first dual-channel array converging lens, and let the light emitted from channel one and channel two of the Z-block component be coupled into channel one and channel two of the array detector in sequence through the first dual-channel array converging lens and the 45° reflecting prism. Observe the response photocurrent of the galvanometer connected to channel one and channel two of the array detector. The position of the first dual-channel array converging lens when the response photocurrent is the largest is the optimal coupling position, and fix the first dual-channel array converging lens.

[0021] The further beneficial effects of adopting the above are: convenient coupling, guaranteed performance of the optical receiver, and significantly improved yield. Attached Figure Description

[0022] Figure 1 This is a front view of a 1.6T FR4 optical module including the optical receiver, based on existing technology.

[0023] Figure 2This is a top view of a 1.6T FR4 optical module including the optical receiver, based on existing technology.

[0024] Figure 3 This is a front view of the optical receiver in this invention;

[0025] Figure 4 This is a top view of the optical receiver in this invention;

[0026] Figure 5 This is a front view of the 1.6T FR4 optical module containing the optical receiver in this invention;

[0027] Figure 6 This is a top view of the 1.6T FR4 optical module containing the optical receiver in this invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Z-block assembly, 2. Collimator, 3. 45° reflecting prism, 4. Array detector, 5. Second dual-channel array converging lens, 6. First dual-channel array converging lens, 7. Glass capillary, 8. Optical fiber, 9. Substrate, 10. PCB board. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] like Figure 3 , Figure 4 As shown, an optical receiver includes a Z-block component 1 and a collimator 2. The collimator 2 is coupled to the light inlet of the Z-block component 1, and external light can be coupled into the Z-block component 1 through the collimator 2. A 45° reflecting prism 3 is arranged on the light-emitting side of the Z-block component 1, and an array detector 4 is arranged below the reflecting surface of the 45° reflecting prism 3. The array detector 4 has four channels, and the Z-block component 1 also has four channels. That is, the aforementioned technology is still consistent with the existing technology.

[0033] A second dual-channel array converging lens 5 is coupled between the reflective surface of the 45° reflecting prism 3 and the array detector 4. The second dual-channel array converging lens 5 is coupled to channel three and channel four of the array detector 4 respectively. Channel three of the Z-block component 1 is coupled to channel three of the array detector 4 in sequence through the 45° reflecting prism 3 and the second dual-channel array converging lens 5. Channel four of the Z-block component 1 is coupled to channel four of the array detector 4 in sequence through the 45° reflecting prism 3 and the second dual-channel array converging lens 5.

[0034] A first dual-channel array converging lens 6 is arranged between the Z-block component 1 and the 45° reflecting prism 3. Channel 1 of the Z-block component 1 is coupled to channel 1 of the array detector 4 in sequence through the first dual-channel array converging lens 6 and the 45° reflecting prism 3. Channel 2 of the Z-block component 1 is coupled to channel 2 of the array detector 4 in sequence through the first dual-channel array converging lens 6 and the 45° reflecting prism 3.

[0035] Since the light is reflected once in channel one of Z-block component 1 and reflected three times in channel two of Z-block component 1, the difference in the optical path is small. Therefore, the light emitted from channel one of Z-block component 1 is coupled into channel one of array detector 4 after passing through the first dual-channel array converging lens 6 and the 45° reflecting prism 3 in sequence, and the light emitted from channel two of Z-block component 1 is coupled into channel two of array detector 4 after passing through the first dual-channel array converging lens 6 and the 45° reflecting prism 3 in sequence. By coupling a single first dual-channel array converging lens 6, the responsivity of channel one and channel two of array detector 4 is maximized simultaneously.

[0036] Furthermore, since the light is reflected five times in channel three of Z-block component 1 and seven times in channel four of Z-block component 1, the difference in the optical path is small. Therefore, the light emitted from channel three of Z-block component 1 is coupled into channel three of array detector 4 after passing through 45° reflecting prism 3 and second dual-channel array converging lens 5 in sequence, and the light emitted from channel four of Z-block component 1 is coupled into channel four of array detector 4 after passing through 45° reflecting prism 3 and second dual-channel array converging lens 5 in sequence. By coupling a second dual-channel array converging lens 5 alone, the responsivity of channel three and channel four of array detector 4 can also be maximized at the same time.

[0037] In this invention, a four-channel array converging lens is split into two dual-channel array converging lenses and coupled at different positions, so that each corresponds to two channels of the array detector 4. Therefore, even with high speed, small photosensitive surfaces of each channel of the array detector 4, manufacturing errors in the Z-block component 1, and different reflections of light in the four channels of the Z-block component 1, it can still be ensured that channels one, two, three, and four of the array detector 4 can be coupled to the maximum at the same time, thereby ensuring the performance of the light receiver and significantly improving the yield.

[0038] Example 2

[0039] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0040] The second dual-channel array converging lens 5 is preferably fixed to the 45° reflecting prism 3 by adhesive bonding. Of course, other fixing methods are not excluded in actual applications; this is just an example.

[0041] Furthermore, the collimator 2 is fixed at the end of the glass capillary tube 7, and the optical fiber 8 coupled to the collimator 2 is fixed inside the glass capillary tube 7. The collimator 2 is preferably a collimating lens.

[0042] Z-block component 1 includes: Z-block and multiple filters. The multiple filters are fixed sequentially on the light-emitting surface of Z-block. This part is prior art, so it will not be described in detail here.

[0043] In embodiment 1 or 2, in practical applications, the optical receiver also includes an electrical chip, which is electrically connected to the array detector 4.

[0044] Example 3

[0045] like Figure 5 , Figure 6 As shown, a 1.6T FR4 optical module includes two optical receivers as in Embodiment 1 or 2.

[0046] Furthermore, the optical receiver has four channels, each with a single wavelength of 200G. 200G × 4 channels × 2 channels equals 1.6T.

[0047] The Z-block component 1, the first dual-channel array converging lens 6, and the 45° reflecting prism 3 are fixed on the substrate 9, which is fixed on the PCB board 10, and the array detector 4 is fixed on the PCB board 10.

[0048] Example 4

[0049] An optical receiver coupling method for coupling an optical receiver as shown in Embodiment 1 or 2, comprising the following steps:

[0050] S100, respectively fix the 45° reflecting prism 3 and the array detector 4;

[0051] S200. A high-precision patch machine is used to align the photosensitive surface of the second dual-channel array converging lens 5 with the photosensitive surface of the third channel of the array detector 4, and to align the second dual-channel array converging lens 5 with the photosensitive surface of the fourth channel of the array detector 4, and fix them. Taking the aforementioned embodiment as an example, the second dual-channel array converging lens 5 can be fixed to the 45° reflecting prism 3 by adhesive bonding.

[0052] S300. Connect an external galvanometer to each of the four channels of the array detector 4, i.e., there are four galvanometers. Couple the collimator 2 and the Z-block component 1, and let the external light source be coupled into the Z-block component 1 through the collimator 2. So that the light emitted from channel three of the Z-block component 1 is coupled into channel three of the array detector 4 through the 45° reflecting prism 3 and the second dual-channel array converging lens 5 in sequence, and so that the light emitted from channel four of the Z-block component 1 is coupled into channel four of the array detector 4 through the 45° reflecting prism 3 and the second dual-channel array converging lens 5 in sequence. Observe the response photocurrent of the galvanometers connected to channel three and channel four of the array detector 4. The position of the collimator 2 and the Z-block component 1 when the response photocurrent is the maximum is the optimal coupling position. Fix the collimator 2 and the Z-block component 1 respectively.

[0053] S400, couple the first dual-channel array converging lens 6, and let the light emitted from channel one of Z-block component 1 be coupled into channel one of array detector 4 through the first dual-channel array converging lens 6 and the 45° reflecting prism 3 in sequence, and let the light emitted from channel two of Z-block component 1 be coupled into channel two of array detector 4 through the first dual-channel array converging lens 6 and the 45° reflecting prism 3 in sequence, and observe the response photocurrent of the galvanometer connected to channel one and channel two of array detector 4. When the response photocurrent is at its maximum, the position of the first dual-channel array converging lens 6 is the optimal coupling position, and fix the first dual-channel array converging lens 6.

[0054] 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-block component (1) and a collimator (2) coupled to the light inlet of the Z-block component (1) are provided. A 45° reflecting prism (3) is arranged on the light outlet side of the Z-block component (1). An array detector (4) is arranged below the reflecting surface of the 45° reflecting prism (3). A second dual-channel array converging lens (5) is coupled between the reflecting surface of the 45° reflecting prism (3) and channel three and channel four of the array detector (4). Channel 4 is coupled to Channel 3 and Channel 4 of the array detector (4) via a 45° reflecting prism (3) and a second dual-channel array converging lens (5) in sequence. Channel 1 and Channel 2 of the Z-block component (1) are coupled to Channel 1 and Channel 2 of the array detector (4) via a first dual-channel array converging lens (6) and a 45° reflecting prism (3) in sequence. Channel 1 and Channel 2 of the Z-block component (1) are adjacent channels, and Channel 3 and Channel 4 of the Z-block component (1) are adjacent channels.

2. The optical receiver according to claim 1, characterized in that, The second dual-channel array converging lens (5) is fixed to the 45° reflecting prism (3) by adhesive bonding.

3. The optical receiver according to claim 1, characterized in that, The collimator (2) is fixed at the end of the glass capillary (7), and an optical fiber (8) coupled to the collimator (2) is fixed inside the glass capillary (7).

4. An optical receiver according to claim 1 or 3, characterized in that, The Z-block component (1) includes: a Z-block and a plurality of filters that are fixed sequentially on the light-emitting surface of the Z-block.

5. An optical receiver according to claim 1, characterized in that, The collimator (2) is a collimating lens.

6. A 1.6T FR4 optical module, characterized in that, include: Two optical receivers as described in any one of claims 1 to 5.

7. A 1.6T FR4 optical module according to claim 6, characterized in that, The optical receiver has four channels, each with a single-wavelength of 200G.

8. A 1.6T FR4 optical module according to claim 6, characterized in that, The Z-block component (1), the first dual-channel array converging lens (6) and the 45° reflecting prism (3) are fixed on the substrate (9), the substrate (9) is fixed on the PCB board (10), and the array detector (4) is fixed on the PCB board (10).

9. A method for coupling an optical receiver, characterized in that, The steps for coupling the optical receiver as described in any one of claims 1 to 5 are as follows: S100, fix the 45° reflecting prism (3) and the array detector (4) respectively; S200, A high-precision patch machine is used to align and fix the photosensitive surfaces of the second dual-channel array converging lens (5) with the photosensitive surfaces of channel three and channel four of the array detector (4); S300. Connect an external galvanometer to each of the four channels of the array detector (4), couple the collimator (2) and the Z-block component (1), and couple the external light source into the Z-block component (1) through the collimator (2). The light emitted from the third and fourth channels of the Z-block component (1) is coupled into the third and fourth channels of the array detector (4) through the 45° reflecting prism (3) and the second dual-channel array converging lens (5) respectively. Observe the response photocurrent of the galvanometer connected to the third and fourth channels of the array detector (4). When the response photocurrent is at its maximum, the position of the collimator (2) and the Z-block component (1) is the optimal coupling position. Fix the collimator (2) and the Z-block component (1) respectively. S400, couple the first dual-channel array converging lens (6), and let the light emitted from channel one and channel two of the Z-block component (1) be coupled into channel one and channel two of the array detector (4) respectively through the first dual-channel array converging lens (6) and the 45° reflecting prism (3). Observe the response photocurrent of the galvanometer connected to channel one and channel two of the array detector (4). When the response photocurrent is at its maximum, the position of the first dual-channel array converging lens (6) is the optimal coupling position, and fix the first dual-channel array converging lens (6).

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