800G 2XFR4 optical engine
By adopting side-by-side coupled PBS groups and combined optical fiber arrays and convergence lenses in the 800G 2XFR4 optical engine, the problems of large space and cumbersome coupling in the traditional optical engine structure are solved, and higher optical path stability and lower assembly costs are achieved.
Patent Information
- Application Number
- CN202421049883.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The traditional 800G 2XFR4 optical engine structure has a large size, which occupies a large PCBA layout space, and the coupling of convergence lens, optical isolator and optical fiber array is complicated, resulting in plug-in loss and insufficient optical path stability.
Two mirror-distributed PBS groups are used, each PBS group has four side-by-side coupled PBSs, instead of Z-b l cok, shorten the length of the collimated optical path, merge the optical fiber array and convergence lens, reduce the number of couplings, and simplify the process.
It greatly improves the stability of the optical path and insertion loss, saves PCBA layout space, reduces assembly costs, and simplifies the process.
Smart Images
Figure CN222167282U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical engines, and in particular to an 800G 2XFR4 optical engine. Background Art
[0002] The traditional 800G 2XFR4 optical engine structure is as follows Figure 1 As shown, it includes: two Zb l coks, each Zb l cok has four light input ports and one light output port, the four light input ports of each Zb l cok are coupled to four laser chips with different wavelengths through four collimating lenses respectively, and the light output port of each Zb l cok is coupled to an optical isolator, a converging lens and a single-channel optical fiber array in sequence. In this solution, since the size of Zb l cok is large, usually, the size L of Zb l cok is 4.84mm, it occupies a large PCBA layout space. In addition, in this solution, there are two converging lenses, optical isolators and optical fiber arrays, and the coupling is relatively cumbersome. Utility Model Content
[0003] The technical problem to be solved by the present invention is to provide an 800G 2XFR4 optical engine to overcome the deficiencies in the above-mentioned prior art.
[0004] The utility model provides a technical solution to the above technical problems as follows: an 800G 2XFR4 optical engine, comprising: two mirror-distributed PBS groups, each PBS group having four PBSs coupled side by side, each PBS group having four light input ports and one light output port, the four light input ports of each PBS group being coupled to four laser chips with different wavelengths through four collimating lenses respectively, and the light output ports of the PBS group being coupled to a converging lens, an optical isolator and an optical fiber array in sequence.
[0005] The beneficial effects of the utility model are as follows: four PBSs coupled side by side are used to replace Zb l cok, which can greatly shorten the length of the collimated optical path, especially for the first channel, there are 7 refractions and reflections back and forth in Zb l cok, while there are only 2 in PBS, so the insertion loss and the optical path stability are greatly improved. In addition, the size of PBS is smaller than that of Zb l cok, which can greatly save PCBA layout space.
[0006] On the basis of the above technical solution, the present invention can also be improved as follows.
[0007] Furthermore, the optical fiber array is a dual-channel optical fiber array, and the light outlets of the two PBS groups are coupled to a dual-channel optical fiber array via a converging lens and an optical isolator.
[0008] The above method has the further beneficial effect that, compared with the prior art, two single-channel optical fiber arrays are combined into one dual-channel optical fiber array, and coupling is performed only once during coupling, thereby reducing the number of couplings, simplifying the process, and reducing assembly costs.
[0009] Furthermore, the converging lens is an array converging lens, and the light outlets of the two PBS groups are coupled to the optical isolator via the same array converging lens.
[0010] The further beneficial effect of adopting the above method is that compared with the prior art, two individual converging lenses are combined into one array converging lens, and during coupling, coupling is only required once, which reduces the number of couplings, simplifies the process, and reduces the assembly cost.
[0011] Furthermore, the light output ports of the two PBS groups are coupled to a dual-channel optical fiber array via the same array converging lens and the same optical isolator.
[0012] The above further beneficial effects are: compared with the prior art, the number of optical isolators is reduced from 2 to 1, which greatly reduces the material. During coupling, only one coupling is required, which reduces the number of couplings, simplifies the process, and reduces the assembly cost.
[0013] Furthermore, a ceramic heat sink is fixed under each laser chip.
[0014] Furthermore, the length dimension of PBS is less than 1 mm.
[0015] A further beneficial effect of adopting the above method is that the PCBA layout space can be greatly saved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of an 800G 2XFR4 optical engine in the prior art;
[0017] Figure 2 This is a structural diagram of the 800G 2XFR4 optical engine in the present invention.
[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0019] 1. PBS group, 2. Collimating lens, 3. Laser chip, 4. Converging lens, 5. Optical isolator, 6. Optical fiber array, 7. Ceramic heat sink. DETAILED DESCRIPTION
[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0021] Example 1
[0022] like Figure 2As shown, an 800G 2XFR4 optical engine includes: two mirror-distributed PBS groups 1, each PBS group 1 has four PBSs coupled in parallel, and the formed PBS group 1 has four light input ports and one light output port. The PBS is a polarization beam splitter or a polarization beam splitter. The PBS reflects the light of the current wavelength and transmits the light of other wavelengths for wavelength combination.
[0023] Since the present embodiment uses the principle that PBS reflects light of its own wavelength and transmits light of other wavelengths, the four light inlets of each PBS group 1 are respectively coupled to four laser chips 3 with different wavelengths through four collimating lenses 2, that is, the wavelengths of the light beams emitted by the four laser chips 3 are different, for example, respectively recorded as: λ1, λ2, λ3, λ4;
[0024] The light beams emitted by the four laser chips 3 with different wavelengths are collimated by a collimating lens 2 and then enter the four light inlets of the PBS group 1 respectively, and then are combined into one beam in the PBS group 1 and then emitted. Since there are two PBS groups 1, the present embodiment still has eight laser chips 3 and eight collimating lenses 2, which is consistent with the prior art.
[0025] The light outlet of the PBS group 1 is coupled to the focusing lens 4, the optical isolator 5 and the optical fiber array 6 in sequence, that is, the light beam emitted from the light outlet of the PBS group 1 is coupled into the optical fiber array 6 after passing through the focusing lens 4 and the optical isolator 5 in sequence;
[0026] Using four PBSs coupled side by side to replace Zb l cok can greatly shorten the length of the collimated optical path, especially for the first channel. There are 7 refractions and reflections back and forth in Zb l cok, but only 2 in PBS, so the insertion loss and optical path stability are greatly improved.
[0027] Example 2
[0028] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:
[0029] The optical fiber array 6 is a dual-channel optical fiber array. The light output ports of the two PBS groups 1 are coupled to a dual-channel optical fiber array through a converging lens 4 and an optical isolator 5, that is, the light outputs of the two PBS groups 1 are finally coupled into a dual-channel optical fiber array. Compared with the prior art, two single-channel optical fiber arrays are combined into one dual-channel optical fiber array. During coupling, only one coupling is required, which reduces the number of coupling times, simplifies the process, and reduces the assembly cost.
[0030] Example 3
[0031] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 2, and the details are as follows:
[0032] The converging lens 4 is an array converging lens, and the light outlets of the two PBS groups 1 are coupled with the optical isolator 5 through the same array converging lens, that is, the light outputs of the two PBS groups 1 are coupled into the optical isolator 5 through one array converging lens. Compared with the prior art, two separate converging lenses are combined into one array converging lens. During coupling, only one coupling is required, which reduces the number of coupling times, simplifies the process, and reduces the assembly cost.
[0033] Example 4
[0034] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 3, and the details are as follows:
[0035] The light output ports of the two PBS groups 1 are coupled to a dual-channel optical fiber array through the same array convergence lens and the same optical isolator 5, that is, the light outputs of the two PBS groups 1 are coupled into an optical isolator 5 through an array convergence lens, and then coupled into a dual-channel optical fiber array from the optical isolator 5. Compared with the prior art, the number of optical isolators 5 is reduced from 2 to 1, which greatly reduces the material. During coupling, only one coupling is required, which reduces the number of coupling times, simplifies the process, and reduces the assembly cost.
[0036] Example 5
[0037] like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 4, and the details are as follows:
[0038] A ceramic heat sink 7 is fixed under each laser chip 3 to facilitate heat dissipation of the laser chip 3. In addition, the length dimension L of the PBS is less than 1 mm, which can greatly save PCBA layout space.
[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. An 800G 2XFR4 optical engine, characterized in that: include: Two mirror-distributed PBS groups (1), each PBS group (1) has four PBSs coupled in parallel, each PBS group (1) has four light input ports and one light output port, the four light input ports of each PBS group (1) are respectively coupled to four laser chips (3) with different wavelengths via four collimating lenses (2), and the light output port of the PBS group (1) is sequentially coupled to a converging lens (4), an optical isolator (5) and an optical fiber array (6).
2. The 800G 2XFR4 optical engine according to claim 1, characterized in that: The optical fiber array (6) is a dual-channel optical fiber array, and the light outlets of the two PBS groups (1) are coupled to a dual-channel optical fiber array via a converging lens (4) and an optical isolator (5).
3. The 800G 2XFR4 optical engine according to claim 2, characterized in that: The converging lens (4) is an array converging lens, and the light outlets of the two PBS groups (1) are coupled to the optical isolator (5) via the same array converging lens.
4. The 800G 2XFR4 optical engine according to claim 3, characterized in that: The light outlets of the two PBS groups (1) are coupled to a dual-channel optical fiber array via the same array convergence lens and the same optical isolator (5).
5. The 800G 2XFR4 optical engine according to claim 1, characterized in that: A ceramic heat sink (7) is fixed under each laser chip (3).
6. The 800G 2XFR4 optical engine according to claim 1, characterized in that: The length dimension of the PBS is less than 1 mm.