A 1.6TSR8 light engine

Abstract

The utility model relates to a 1.6T SR8 light engine, include: PCB board and locate TX lens and RX lens on the PCB board, be equipped with array Vcsel chip and driver chip on the covering area of TX lens on the PCB board, array Vcsel chip is coupled with TX lens, and driver chip is electrically connected with array Vcsel chip, be equipped with array PD chip and TIA chip on the covering area of RX lens on the PCB board, array PD chip is coupled with RX lens, and TIA chip is electrically connected with array PD chip. Advantageous effects are: let array Vcsel chip only with a TX lens coupling, and let array PD chip only with a RX lens coupling, so coupling time TX lens only needs to guarantee the annular flux of Vcsel chip, RX lens only needs to guarantee the responsivity of PD chip, so coupling speed is fast, and product performance is best, and yield is high.

Description

Technical Field

[0001] This utility model relates to the field of light engine technology, specifically to a 1.6T SR8 light engine. Background Technology

[0002] Traditional 1.6T SR8 light engine Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes: a PCB board, two lenses, two 1×4 array VCSEL chips, two driver chips, two 1×4 array PD chips, two TIA chips, a first ferrule, and a second ferrule. The two lenses are mounted on the PCB board. Each lens's coverage area on the PCB board contains one 1×4 array VCSEL chip, one driver chip, one 1×4 array PD chip, and one TIA chip. The 1×4 array VCSEL chip covered by each lens is electrically connected to the driver chip, and the 1×4 array PD chip covered by each lens is electrically connected to the TIA chip. The driver chip and TIA chip are respectively electrically connected to the PCB board. Each lens has a chip-side cavity within a recess for accommodating the chip. The system comprises a 1×4 first array lens and a 1×4 third array lens coupled to a reflective surface. Each lens has a 1×4 second array lens and a 1×4 fourth array lens coupled to its reflective surface on its optical port side. The 1×4 first array lens is coupled to the 1×4 second array lens via a reflective surface, and the 1×4 fourth array lens is coupled to the 1×4 third array lens via a reflective surface. A 1×4 array VCSEL chip is coupled to the 1×4 first array lens, and a 1×4 array PD chip is coupled to the 1×4 third array lens. A first ferrule coupled to the 1×4 second array lens and the 1×4 fourth array lens is inserted into the optical port side of each lens. The pigtails of the TX and RX fibers in the first ferrules inserted on each lens are inserted into the same second ferrule after the bare fibers are stripped.

[0003] In the above scheme, a 1×4 array VCSEL chip and a 1×4 array PD chip share the same lens, so the following problem exists: 1) Due to the small photosensitive surface and small coupling tolerance of the single-wavelength 200G PD chip, the placement accuracy of the PD chip and VCSEL chip is ±3μm, so an expensive pick-and-place machine is required for placement. 2) Due to the small photosensitive surface and small coupling tolerance of the single-wavelength 200G PD chip, the coupling lens requires the simultaneous guarantee of the PD chip's responsivity and the VCSEL chip's ring flux, making it difficult to guarantee the yield and resulting in slow coupling speed. 3) To ensure high electrical performance, the drive current of the Vcsel chip cannot be too low. In most cases, optical attenuation is required to ensure that the optical power is within the acceptable range under high drive current. The current practice is to add an attenuator between the Vcsel chip and the 1×4 first array lens, which results in high cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a 1.6T SR8 light engine to overcome the shortcomings of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A 1.6T SR8 optical engine includes: a PCB board and a TX lens and an RX lens disposed on the PCB board. An array VCSEL chip and a Driver chip are disposed on the PCB board in the coverage area of ​​the TX lens. The array VCSEL chip is coupled to the TX lens, and the Driver chip is electrically connected to the array VCSEL chip. An array PD chip and a TIA chip are disposed on the PCB board in the coverage area of ​​the RX lens. The array PD chip is coupled to the RX lens, and the TIA chip is electrically connected to the array PD chip.

[0006] The beneficial effects of this utility model are: in this solution, the array Vcsel chip and the array PD chip no longer share a lens, but the array Vcsel chip is coupled to only one TX lens, and the array PD chip is coupled to only one RX lens. Therefore, during coupling, the TX lens only needs to ensure the ring flux of the Vcsel chip, and the RX lens only needs to ensure the responsiveness of the PD chip. As a result, the coupling speed is fast, the product performance is optimal, and the yield is high.

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

[0008] Furthermore, carbon powder is added inside the TX lens.

[0009] The further beneficial effects of adopting the above are as follows: Since the array PD chip and the array Vcsel chip are coupled with different lenses, carbon powder can be added into the TX lens to increase light attenuation, thus eliminating the need to add an attenuator and reducing costs.

[0010] Furthermore, the TX lens is made of PEI.

[0011] Furthermore, the RX lens is made of PEI.

[0012] Furthermore, the VCSEL chip is a 2×4 array VCSEL chip. The chip side of the TX lens has a 2×4 first array lens coupled to its reflective surface in the cavity used to accommodate the chip. The 2×4 first array lens consists of two 1×4 first array lenses distributed in front and behind. The 2×4 array VCSEL chip is coupled to the 2×4 first array lens. The optical port side of the TX lens has a 2×4 second array lens coupled to its reflective surface. The 2×4 second array lens consists of two 1×4 second array lenses distributed above and below. The 2×4 first array lens is coupled to the 2×4 second array lens through the reflective surface. A Driver chip is distributed in front of and behind the 2×4 array VCSEL chip.

[0013] The further beneficial effect of adopting the above is that the array VCSEL chip is a 2×4 array VCSEL chip, which eliminates the need for a high-precision pick-and-place machine and reduces production costs.

[0014] Furthermore, a TX ferrule is inserted into the optical port side of the TX lens. The upper and lower rows of TX fibers distributed in the TX ferrule are coupled to the two 1×4 second array lenses distributed in the upper and lower sections, respectively. The pigtail of the upper row of TX fibers in the TX ferrule is inserted into the first ferrule after the bare fiber is stripped out, and the pigtail of the lower row of TX fibers in the TX ferrule is inserted into the second ferrule after the bare fiber is stripped out.

[0015] Furthermore, the array PD chip is a 2×4 array PD chip. The chip side of the RX lens has a 2×4 third array lens coupled to its reflective surface in the cavity used to accommodate the chip. The 2×4 third array lens consists of two 1×4 third array lenses distributed in front and behind. The 2×4 array PD chip is coupled to the 2×4 third array lens. The optical port side of the RX lens has a 2×4 fourth array lens coupled to its reflective surface. The 2×4 fourth array lens consists of two 1×4 fourth array lenses distributed above and below. The 2×4 fourth array lens is coupled to the 2×4 third array lens through the reflective surface. A TIA chip is distributed in front of and behind the 2×4 array PD chip.

[0016] The further beneficial effects of adopting the above are: the array PD chip is a 2×4 array PD chip, which eliminates the need for a high-precision placement machine and reduces production costs.

[0017] Furthermore, an RX ferrule is inserted into the optical port side of the RX lens. The upper and lower rows of RX fibers distributed in the RX ferrule are coupled to the two 1×4 third array lenses distributed in the upper and lower sections, respectively. The pigtail of the upper row of RX fibers in the RX ferrule is inserted into the first ferrule after the bare fiber is stripped out. The pigtail of the lower row of RX fibers in the RX ferrule is inserted into the second ferrule after the bare fiber is stripped out.

[0018] Furthermore, the single-wavelength of a single PD chip in the array PD chip is 200G. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a 1.6T SR8 optical engine in the existing technology; Figure 2 This is a side view of the optical transmission path in the prior art; Figure 3 This is a side view of the optical receiving path in the prior art; Figure 4 This is a bottom view of a lens in the prior art; Figure 5 This is a structural diagram of the 1.6T SR8 light engine in this utility model; Figure 6 This is a side view of the optical transmission path in this utility model; Figure 7 This is a bottom view of the TX lens in this utility model; Figure 8 This is a side view of the TX ferrule in this utility model; Figure 9 This is a side view of the optical receiving path in this utility model; Figure 10 This is a bottom view of the RX lens in this utility model; Figure 11 This is a side view of the RX ferrule in this utility model.

[0020] The attached diagram lists the components represented by each number as follows: 1. PCB board; 2. TX lens; 210, 2×4 first array lens; 220, 2×4 second array lens; 3. RX lens; 310, 2×4 third array lens; 320, 2×4 fourth array lens; 4. Array VCSEL chip; 5. Driver chip; 6. Array PD chip; 7. TIA chip; 8. TX ferrule; 9. First ferrule; 10. Second ferrule; 11. RX ferrule. Detailed Implementation

[0021] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0022] Example 1 like Figure 5 , Figure 6 , Figure 9As shown, a 1.6T SR8 optical engine includes: a PCB board 1, a TX lens 2 and an RX lens 3, wherein the TX lens 2 and the RX lens 3 are both fixed on the PCB board 1. Preferably, the TX lens 2 and the RX lens 3 are fixed on the same surface of the PCB board 1. An array Vcsel chip 4 and a Driver chip 5 are provided on the PCB board 1 in the coverage area of ​​the TX lens 2. The array Vcsel chip 4 is coupled to the TX lens 2, that is, the emitted light of the array Vcsel chip 4 can be coupled into the TX lens 2. The Driver chip 5 is electrically connected to the array Vcsel chip 4 and electrically connected to the PCB board 1. An array PD chip 6 and a TIA chip 7 are provided on the PCB board 1 in the coverage area of ​​the RX lens 3. The array PD chip 6 is coupled to the RX lens 3. For the received light, the received light is coupled into the array PD chip 6 through the RX lens 3. The TIA chip 7 is electrically connected to the array PD chip 6 and to the PCB board 1. In this scheme, the array Vcsel chip 4 and the array PD chip 6 no longer share a lens. Instead, the array Vcsel chip 4 is coupled to only one TX lens 2, and the array PD chip 6 is coupled to only one RX lens 3. Therefore, during coupling, the TX lens 2 only needs to ensure the ring flux of the Vcsel chip, and the RX lens 3 only needs to ensure the responsiveness of the PD chip. As a result, the coupling speed is fast, the product performance is optimal, and the yield is high.

[0023] Example 2 like Figure 5 , Figure 6 , Figure 7 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: Carbon powder is added inside the TX lens 2. Since the array PD chip 6 and the array Vcsel chip 4 are coupled with different lenses, carbon powder can be added inside the TX lens 2 to increase light attenuation, thus eliminating the need for an attenuator and reducing costs.

[0024] Example 3 like Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below: The preferred material for TX lens 2 is PEI, and the preferred material for RX lens 3 is PEI.

[0025] Example 4 like Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, this embodiment is a further improvement on embodiment 1, 2, or 3, as detailed below: The VCSEL chip 4 is a 2×4 array VCSEL chip. The 2×4 array in a 2×4 VCSEL chip can be understood as having two rows of VCSEL chips, with four VCSEL chips in each row. Subsequent 2×4 arrays and 1×4 arrays can be understood in the same way. The TX lens 2 has a 2×4 first array lens 210 coupled to its reflective surface within a cavity used to accommodate the chip. The 2×4 first array lens 210 consists of two 1×4 first array lenses distributed in front of and behind each other. The 2×4 array VCSEL chip... Coupled with the 2×4 first array lens 210, that is, each row of the 2×4 array Vcsel chip has four Vcsel chips coupled with one 1×4 first array lens. The optical port side of the TX lens 2 has a 2×4 second array lens 220 coupled with its reflective surface. The 2×4 second array lens 220 consists of two 1×4 second array lenses distributed above and below each other. The 2×4 first array lens 210 is coupled with the 2×4 second array lens 220 through the reflective surface. A Driver chip 5 is distributed in front of and behind the 2×4 array Vcsel chip.

[0026] Furthermore, a TX ferrule 8 is inserted into the optical port side of the TX lens 2. The upper and lower rows of TX fibers distributed in the TX ferrule 8 are coupled to the two 1×4 second array lenses distributed in the upper and lower sections, respectively. The pigtail of the upper row of TX fibers in the TX ferrule 8 is inserted into the first ferrule 9 after the bare fiber is stripped out, and the pigtail of the lower row of TX fibers in the TX ferrule 8 is inserted into the second ferrule 10 after the bare fiber is stripped out. That is, the optical port is connected in the form of fiber crossing.

[0027] Example 5 like Figure 5 , Figure 9 , Figure 10 , Figure 11 As shown, this embodiment is a further improvement on embodiment 1, 2, 3, or 4, as detailed below: The array PD chip 6 is a 2×4 array PD chip. The 2×4 array in a 2×4 array PD chip can be understood as having two rows of PD chips, with four PD chips in each row. Subsequent 2×4 arrays and 1×4 arrays can be understood in the same way. The chip side of the RX lens 3 has a 2×4 third array lens 310 coupled to its reflective surface within a cavity used to accommodate the chip. The 2×4 third array lens 310 consists of two 1×4 third array lenses distributed in front and behind each other. The 2×4 array PD chip and the 2×4... The third array lens 310 is coupled to each of the four PD chips in each row of the 2×4 array PD chip, that is, each of the four PD chips in each row is coupled to a 1×4 third array lens. The optical port side of the RX lens 3 has a 2×4 fourth array lens 320 coupled to its reflective surface. The 2×4 fourth array lens 320 consists of two 1×4 fourth array lenses distributed above and below each other. The 2×4 fourth array lens 320 is coupled to the 2×4 third array lens 310 through the reflective surface. A TIA chip 7 is distributed in front of and behind the 2×4 array PD chip.

[0028] Furthermore, an RX ferrule 11 is inserted into the optical port side of the RX lens 3. The upper and lower rows of RX fibers distributed in the RX ferrule 11 are coupled to the two 1×4 third array lenses distributed in the upper and lower sections, respectively. The pigtail of the upper row of RX fibers in the RX ferrule 11 is inserted into the first ferrule 9 after the bare fiber is stripped out, and the pigtail of the lower row of RX fibers in the RX ferrule 11 is inserted into the second ferrule 10 after the bare fiber is stripped out. That is, the fiber is connected to the optical port in the form of fiber crossing.

[0029] Example 6 like Figure 5 , Figure 9 As shown, this embodiment is a further improvement on any one of embodiments 1 to 5, as detailed below: The single-wavelength of a single PD chip in array PD chip 6 is 200G, which is consistent with the existing technology. 200G×8 channels=1.6T.

[0030] 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 1.6T SR8 light engine, characterized in that, include: The PCB board (1) and the TX lens (2) and RX lens (3) are provided on the PCB board (1). The PCB board (1) has an array Vcsel chip (4) and a Driver chip (5) in the coverage area of ​​the TX lens (2). The array Vcsel chip (4) is coupled to the TX lens (2), and the Driver chip (5) is electrically connected to the array Vcsel chip (4). The PCB board (1) has an array PD chip (6) and a TIA chip (7) in the coverage area of ​​the RX lens (3). The array PD chip (6) is coupled to the RX lens (3), and the TIA chip (7) is electrically connected to the array PD chip (6).

2. The 1.6T SR8 light engine according to claim 1, characterized in that, Carbon powder is added to the TX lens (2).

3. A 1.6T SR8 light engine according to claim 2, characterized in that, The TX lens (2) is made of PEI.

4. A 1.6T SR8 light engine according to claim 1, characterized in that, The RX lens (3) is made of PEI.

5. A 1.6T SR8 light engine according to claim 1, characterized in that, The array Vcsel chip (4) is a 2×4 array Vcsel chip. The chip side of the TX lens (2) has a 2×4 first array lens (210) coupled to its reflective surface in the cavity used to accommodate the chip. The 2×4 first array lens (210) consists of two 1×4 first array lenses distributed in front and behind. The 2×4 array Vcsel chip is coupled to the 2×4 first array lens (210). The optical port side of the TX lens (2) has a 2×4 second array lens (220) coupled to its reflective surface. The 2×4 second array lens (220) consists of two 1×4 second array lenses distributed above and below. The 2×4 first array lens (210) is coupled to the 2×4 second array lens (220) through the reflective surface. A Driver chip (5) is distributed in front of and behind the 2×4 array Vcsel chip.

6. A 1.6T SR8 light engine according to claim 5, characterized in that, A TX ferrule (8) is inserted into the optical port side of the TX lens (2). The upper and lower rows of TX fibers distributed in the TX ferrule (8) are coupled to the two 1×4 second array lenses distributed in the upper and lower sections, respectively. After the bare fiber is stripped, the pigtail of the upper row of TX fibers in the TX ferrule (8) is inserted into the first ferrule (9). After the bare fiber is stripped, the pigtail of the lower row of TX fibers in the TX ferrule (8) is inserted into the second ferrule (10).

7. A 1.6T SR8 light engine according to claim 1, characterized in that, The array PD chip (6) is a 2×4 array PD chip. The chip side of the RX lens (3) has a 2×4 third array lens (310) coupled to its reflective surface in the cavity used to accommodate the chip. The 2×4 third array lens (310) consists of two 1×4 third array lenses distributed in front and behind. The 2×4 array PD chip is coupled to the 2×4 third array lens (310). The optical port side of the RX lens (3) has a 2×4 fourth array lens (320) coupled to its reflective surface. The 2×4 fourth array lens (320) consists of two 1×4 fourth array lenses distributed above and below. The 2×4 fourth array lens (320) is coupled to the 2×4 third array lens (310) through the reflective surface. A TIA chip (7) is distributed in front of and behind the 2×4 array PD chip.

8. A 1.6T SR8 light engine according to claim 7, characterized in that, An RX ferrule (11) is inserted into the optical port side of the RX lens (3). The upper and lower RX fibers distributed in the RX ferrule (11) are coupled to the two 1×4 third array lenses distributed in the upper and lower sections, respectively. After the bare fiber is stripped, the pigtail of the upper RX fiber in the RX ferrule (11) is inserted into the first ferrule (9). After the bare fiber is stripped, the pigtail of the lower RX fiber in the RX ferrule (11) is inserted into the second ferrule (10).

9. A 1.6T SR8 light engine according to any one of claims 1 to 8, characterized in that, The single-wavelength of a single PD chip in the array PD chip (6) is 200G.

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