Low-cost high-stability BOX-ray device
By abolishing expensive materials in BOX optical devices and using cylindrical convergence lenses and optical isolators, the process steps and optical paths are simplified, and the existing BOX optical devices are solved, with high cost, high materials and complex processes are achieved, and low-cost, high stability and high-efficiency optical path coupling is achieved.
Patent Information
- Application Number
- CN202422084470.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing BOX optical devices have high costs due to the large number of materials, many welding parts, complex processes, slow coupling speed, poor optical path reliability and expensive materials.
A low-cost and high-stability BOX optical device was designed. By opening holes in the BOX shell and laying a cylindrical convergence lens through, the expensive sapphire, sapphire seat, lens sleeve, adjustment ring and prism are eliminated. Only the LC adapter and BOX shell need to be welded, the BOX shell is sealed with low-temperature glass solder, and the optical isolator is fixed inside the BOX shell to simplify the optical path.
It has achieved a significant reduction in costs, reduced material quantity, reduced process steps, improved coupling speed, and higher optical path stability. The entire device length can be reduced by more than 2mm, making it more suitable for optical modules.
Smart Images
Figure CN222913928U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of optical devices, and particularly relates to a low-cost and high-stability BOX optical device. Background Art
[0002] In existing BOX optical devices, the optical window of the BOX housing generally uses a sapphire optical window, and its encapsulation steps are as follows: gold is plated around the sapphire (the light passing hole area in the middle is not plated), and then the gold-plated area of the sapphire is welded to the sapphire seat using a gold-tin solder. The material of the sapphire seat is kovar alloy. The sapphire seat is then fixed and sealed to the BOX housing by brazing. A lens sleeve is fixed outside the sapphire seat, and an LC adapter is fixed outside the lens sleeve through an adjusting ring. A converging lens coupled to the LC adapter is fixed inside the lens sleeve. A prism for parallelly raising the outgoing light of the Z-b l cok by a predetermined height so that it enters the sapphire is coupled between the sapphire and the Z-b l cok inside the BOX housing. Specifically, as Figure 1 shown, this type of BOX optical device has a relatively large number of welding parts due to its large number of materials, resulting in a relatively complex process, a relatively slow coupling speed during encapsulation, and relatively poor optical path reliability. In addition, the use of expensive sapphire and sapphire seats leads to a relatively high overall cost. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a low-cost and high-stability BOX optical device to overcome the above deficiencies in the prior art.
[0004] The technical solution of the utility model for solving the above technical problem is as follows: a low-cost and high-stability BOX optical device, including: a BOX housing, a hole is opened on the side wall of the BOX housing, a cylindrical converging lens sealedly connected to the BOX housing is arranged through the hole on the BOX housing, an LC adapter coupled to the cylindrical converging lens is fixed outside the BOX housing, a Z-b l cok placed in a mirror image is fixed inside the BOX housing, an optical isolator is coupled between the light output port of the Z-b l cok and the cylindrical converging lens inside the BOX housing, the optical isolator is fixed to the Z-b l cok, and a plurality of optical emission ends coupled to the respective filter wafers on the Z-b l cok are arranged inside the BOX housing.
[0005] On the basis of the above technical solution, the utility model can be further improved as follows.
[0006] Further, the LC adapter covers the cylindrical converging lens in a sealed manner.
[0007] Further, the cylindrical converging lens is sealed and welded to the BOX housing using a low-temperature glass solder.
[0008] Further, a TEC cooler is fixed inside the BOX housing, and the optical emission end is fixed on the TEC cooler.
[0009] Furthermore, the optical emission end includes: a ceramic heat sink fixed on the TEC cooler, a laser chip fixed on the ceramic heat sink, and a collimating lens coupled between the laser chip and the filter on the TEC cooler.
[0010] The beneficial effects of the present utility model are as follows:
[0011] The cylindrical converging lens not only plays a sealing role but also serves as a converging lens for optical path coupling. Expensive sapphire, sapphire seat, lens sleeve, adjusting ring, and prism are eliminated. Only two materials, namely the LC adapter and the BOX housing, need to be welded. After coupling, the laser welding parts are reduced. Compared with the prior art, the cost is significantly reduced, the number of materials is decreased, and the process steps are reduced. In addition, since there are fewer optical and structural materials in the whole product, the product coupling speed is increased, the optical path stability is higher, and the length of the whole device can be reduced by more than 2 mm, which is more convenient for the use of the optical module;
[0012] Since the optical isolator is moved inside the BOX housing, there is no error of the optical isolator compared with the prior art. Therefore, the LC adapter does not need to adjust the focal length and can be directly fixed with a fixed focal length and welded to the BOX housing (the focal length from the LC optical fiber end face to the cylindrical converging lens). The Z-b lcok is placed mirror-image + the optical isolator is fixed on the Z-b lcok. The optical isolator can play a role in folding the optical path downward, so the prism can be eliminated. In addition, since the optical isolator is closer to the optical emission end in the optical path, the reflected light of the optical emission end is smaller. Description of the Drawings
[0013] Figure 1 It is a structural diagram of a BOX optical device in the prior art;
[0014] Figure 2 It is a structural diagram of a low-cost and high-stability BOX optical device in the present utility model;
[0015] Figure 3 It is a structural diagram of the BOX housing in the present utility model.
[0016] In the drawings, the list of components represented by each reference numeral is as follows:
[0017] 1. BOX housing, 110. Hole, 2. Cylindrical converging lens, 3. LC adapter, 4. Z-b lcok, 410. Filter, 5. Optical isolator, 6. Optical emission end, 610. Ceramic heat sink, 620. Laser chip, 630. Collimating lens, 7. TEC cooler. Detailed Embodiments
[0018] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0019] Embodiment 1
[0020] As Figure 2 、 Figure 3 shown, a low-cost and high-stability BOX optical device includes: a BOX housing 1, with a hole 110 opened on the side wall of the BOX housing 1, and a cylindrical converging lens (C-Lens) 2 penetratingly arranged in the hole 110 of the BOX housing 1 and hermetically connected to the BOX housing 1. The length of the cylindrical converging lens 2 only needs to extend to both ends outside the hole 110, that is, the above-mentioned penetrating arrangement.
[0021] An LC adapter 3 coupled to the cylindrical converging lens 2 is fixed outside the BOX housing 1. In addition, a mirror-placed Z-block 4 is fixed inside the BOX housing 1. An optical isolator 5 is coupled between the light output port of the Z-block 4 and the cylindrical converging lens 2 inside the BOX housing 1, and the optical isolator 5 is fixed to the Z-block 4. A plurality of optical emission ends 6 coupled to the respective filter elements 410 on the Z-block 4 are arranged inside the BOX housing 1. The light beams emitted by the plurality of optical emission ends 6 are respectively coupled into the Z-block 4 through the filter elements 410, merged into one beam and then enter the optical isolator 5, and then are incident from the optical isolator 5 to the cylindrical converging lens 2, and finally are coupled into the LC adapter 3 by the cylindrical converging lens 2.
[0022] The cylindrical converging lens 2 not only plays a sealing role but also is a converging lens for optical path coupling. Expensive sapphire, sapphire seat, lens sleeve, adjusting ring, and prism are eliminated. Only two materials, namely the LC adapter 3 and the BOX housing 1, need to be welded (in the prior art, the welding materials are the adjusting ring, LC adapter, lens sleeve, and BOX housing). After coupling, the laser welding parts are reduced. Compared with the prior art, the cost is greatly reduced, the number of materials is reduced, and the process steps are reduced. In addition, since there are fewer optical and structural materials in the whole product, the coupling speed of the product is increased, the optical path stability is higher, and the length of the whole device can be reduced by more than 2 mm, which is more convenient for the use of the optical module.
[0023] Since the optical isolator 5 is moved into the BOX housing 1, there is no error of the optical isolator 5 compared with the prior art. Therefore, the LC adapter 3 does not need to adjust the focal length and can directly fix the focal length and be welded to the BOX housing 1 (the focal length from the LC fiber end face to the cylindrical converging lens). The Z-b l cok 4 is placed mirror-image, and the optical isolator 5 is fixed on the Z-b l cok 4. The optical isolator 5 can play a role in folding the optical path downward, so that the prism can be cancelled. In addition, since the optical isolator 5 is closer to the optical transmitting end 6 in the optical path, the reflected light of the optical transmitting end 6 is smaller.
[0024] Embodiment 2
[0025] As Figure 2 shown, this embodiment is a further improvement on the basis of Embodiment 1, and the specific content is as follows:
[0026] The LC adapter 3 covers the cylindrical converging lens 2 in a sealed manner, which can prevent the external environment from polluting the cylindrical converging lens 2 and thus affecting the optical path.
[0027] Embodiment 3
[0028] As Figure 2 shown, this embodiment is a further improvement on the basis of Embodiment 1 or 2, and the specific content is as follows:
[0029] The cylindrical converging lens 2 is hermetically welded to the BOX housing 1 using a low-temperature glass solder.
[0030] Embodiment 4
[0031] As Figure 2 shown, this embodiment is a further improvement on the basis of any one of Embodiments 1 to 3, and the specific content is as follows:
[0032] A TEC cooler 7 is fixed inside the BOX housing 1, and the optical transmitting end 6 is fixed on the TEC cooler 7. The TEC cooler 7 can dissipate heat from the optical transmitting end 6.
[0033] Furthermore: The optical transmitting end 6 includes: a ceramic heat sink 610, the ceramic heat sink 610 is fixed on the TEC cooler 7, a laser chip 620 is fixed on the ceramic heat sink 610, a collimating lens 630 is coupled between the laser chip 620 and the filter 410 on the TEC cooler 7, and the light beam emitted by each laser chip 620 first passes through the collimating lens 630 and then is coupled into the filter 410 of the Z-b lcok 4.
[0034] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A low-cost and high-stability BOX optical device, characterized in that: include: A BOX shell (1), a hole (110) is provided on a side wall of the BOX shell (1), a cylindrical converging lens (2) sealed and connected to the BOX shell (1) is arranged through the hole (110) on the BOX shell (1), an LC adapter (3) coupled to the cylindrical converging lens (2) is fixed outside the BOX shell (1), a mirror-placed Z-blcok (4) is fixed inside the BOX shell (1), an optical isolator (5) is coupled between the light outlet of the Z-blcok (4) and the cylindrical converging lens (2) inside the BOX shell (1), the optical isolator (5) is fixed to the Z-blcok (4), and a plurality of light emitting ends (6) coupled to respective filters (410) on the Z-blcok (4) are arranged inside the BOX shell (1).
2. A low-cost and high-stability BOX optical device according to claim 1, characterized in that: The LC adapter (3) covers the cylindrical converging lens (2) in a sealed manner.
3. A low-cost and high-stability BOX optical device according to claim 1, characterized in that: The cylindrical converging lens (2) is sealed and welded to the BOX housing (1) using low-temperature glass solder.
4. A low-cost and high-stability BOX optical device according to claim 1, characterized in that: A TEC cooler (7) is fixed inside the BOX shell (1), and the light emitting end (6) is fixed on the TEC cooler (7).
5. A low-cost and high-stability BOX optical device according to claim 4, characterized in that: The light emitting end (6) comprises: a ceramic heat sink (610), the ceramic heat sink (610) is fixed on a TEC cooler (7), a laser chip (620) is fixed on the ceramic heat sink (610), and a collimating lens (630) is coupled between the laser chip (620) and a filter (410) on the TEC cooler (7).