Miniaturized unilateral isolation and gain flattening hybrid integrated device
By placing the input and output ports on the same side in a miniaturized hybrid integrated device with single-sided isolation and gain flatness, and using laser welding to connect them, the problem of large assembly module size is solved, high sealing and applicability are achieved, and costs are reduced.
Patent Information
- Application Number
- CN202520227696.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Conventional hybrid isolation and gain-flattening integrated devices have fibers coming out from both sides, resulting in a large assembly module size.
A miniaturized hybrid integrated device with single-sided isolation and gain flatness is designed by placing the input and output ports of the pin assembly on the same side outside the outer casing and connecting them by laser welding, thereby reducing the size of the assembled module.
It achieves volume savings in assembly modules, improves the airtightness and sealing of devices, is suitable for high temperature and high humidity environments, reduces costs, and improves versatility and flexibility.
Smart Images
Figure CN223582284U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical device technical field, especially a kind of miniaturized single-side isolation and gain flat mixed integrated device. BACKGROUND
[0002] The conventional isolation and gain flat mixed integrated device is widely used in erbium doped fiber amplifier (EDFA for short), which obtains flat spectrum by gain equalization of signals of different wavelengths. In the prior art, the conventional isolation and gain flat mixed integrated device is two-side fiber, and glue is used for packaging. In the EDFA module assembly process, to avoid the loss caused by the bending of the two-side fiber, a fixed fiber disc position is usually reserved for the two sides of the device, which causes the problem of large module volume.
[0003] Therefore, how to overcome the defects of the prior art and solve the problem of large volume of the existing isolation and gain flat mixed integrated device with two-side fiber is a difficult problem to be solved in the technical field. SUMMARY
[0004] To overcome the defects of the prior art or improve the demand, the existing isolation and gain flat mixed integrated device has two-side fiber and large volume. The utility model provides a kind of miniaturized single-side isolation and gain flat mixed integrated device, which saves the volume of the assembled module by one-side fiber.
[0005] The utility model adopts the following technical solutions:
[0006] The utility model provides a kind of miniaturized single-side isolation and gain flat mixed integrated device, including pin subassembly 1 and lens subassembly 2, the pin subassembly 1 with the lens subassembly 2 is connected by bridging pipe 3, the pin subassembly 1, the lens subassembly 2 and the bridging pipe 3 outside are provided with outer envelope tube 4;The input port 1011 and output port 1012 of the pin subassembly 1 are located at the same side outside the outer envelope tube 4;Wherein:
[0007] Light enters the pin subassembly 1 from the input port 1011, is reflected in the lens subassembly 2 after transmission to the lens subassembly 2, and the reflected light is output from the output port 1012 after passing through the pin subassembly 1.
[0008] In some embodiments, the pin assembly 1 comprises a double-core pin 101, a beam splitter 102, and a half-wave plate 103, wherein the beam splitter 102 is arranged on the side of the double-core pin 101 away from the input port 1011 and the output port 1012, the half-wave plate 103 is arranged on the side of the beam splitter 102 away from the double-core pin 101, and the half-wave plate 103 is arranged on the input light path.
[0009] In some embodiments, the double-core pin 101 is provided with a tail seat 1013, and the input port 1011 and the output port 1012 are arranged outside the tail seat 1013.
[0010] In some embodiments, the tail seat 1013 has a diameter greater than that of the other part of the double-core pin 101, and one end of the outer envelope tube 4 is fixed to the inside of the tail seat 1013.
[0011] In some embodiments, the lens assembly 2 comprises a collimating lens 201, a Faraday rotator 202, a filter 203, and a magnetic ring 204, wherein the collimating lens 201 is arranged on the side close to the pin assembly 1, the Faraday rotator 202 is arranged on the side of the collimating lens 201 away from the pin assembly 1, the filter 203 is arranged on the side of the Faraday rotator 202 away from the collimating lens 201, and the magnetic ring 204 is arranged outside the collimating lens 201, the Faraday rotator 202, and the filter 203.
[0012] In some embodiments, the magnetic ring 204 is sleeved outside the collimating lens 201, the Faraday rotator 202, and the filter 203, or the magnetic ring 204 is adhered to the inside of the outer envelope tube 4.
[0013] In some embodiments, one end of the bridge tube 3 is fixed to the collimating lens 201 of the lens assembly 2, and the other end of the bridge tube 3 is fixed to the double-core pin 101 of the pin assembly 1.
[0014] In some embodiments, the outer envelope tube 4 and the tail seat 1013 are fixed by laser welding.
[0015] In some embodiments, the input and output light paths of the double-core pin 101 are of a pitch type, and the tail seat 1013 is a metal tail seat.
[0016] In some embodiments, the filter 203 is arranged at a preset angle.
[0017] Compared with the prior art, the miniaturized single-side isolation and gain flat mixed integrated device has the input port and the output port of the pin assembly arranged on the same side outside the outer sealing tube, and the fiber is output from one side, so that the volume of the assembled module is greatly saved.
[0018] Further, the outer sealing tube is welded by the laser welding tube shell, has high airtightness and sealing property, and can be used in high temperature and high humidity environment.
[0019] Further, the optical element used in the utility model is small in size, high in universality and flexibility, low in cost, and can be mass-produced, and has great significance for the existing market. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme of the utility model embodiment, the drawings needed to be used in the utility model embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and other drawings can be obtained according to the drawings for those skilled in the art without creative labor.
[0021] Figure 1 A structure schematic view of the miniaturized single-side isolation and gain flat mixed integrated device provided by the utility model embodiment is shown in the figure.
[0022] Figure 2 A structure schematic view of the double-core pin provided by the utility model embodiment is shown in the figure.
[0023] Figure 3 An installation schematic view of the double-core pin and the beam splitter provided by the utility model embodiment is shown in the figure.
[0024] Figure 4 An installation schematic view of the double-core pin, the beam splitter and the half-wave plate provided by the utility model embodiment is shown in the figure.
[0025] Figure 5 A structure schematic view of the lens assembly provided by the utility model embodiment is shown in the figure.
[0026] Figure 6 An installation schematic view of the pin assembly and the lens assembly provided by the utility model embodiment is shown in the figure.
[0027] Figure 7 An optical path schematic view provided by the utility model embodiment is shown in the figure. DETAILED DESCRIPTION
[0028] In the description of the utility model, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and do not require the utility model to be necessarily constructed and operated in a particular orientation, and therefore should not be understood as limiting the utility model.
[0029] The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made. These all belong to the protection scope of the utility model.
[0030] It should be noted that, if there is no conflict, each feature in the embodiments of the utility model can be combined with each other, and all within the protection scope of the utility model. Unless otherwise defined, all technical and scientific terms used in the specification have the same meaning as understood by those skilled in the art of the technology to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not used to limit the utility model.
[0031] Unless otherwise required by the context, the term "comprising" is interpreted to mean "including, but not limited to" throughout the specification and claims. In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to mean that the specific feature, structure, material or characteristic associated with that embodiment or example is included in at least one embodiment or example of the disclosure. The illustrative representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner, that is, although they are carried in the embodiments or examples of the above terms due to the order of appearance and location, they are not limited to being carried by one embodiment or example in a combined manner.
[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and not to limit the utility model.
[0033] As Figure 1As shown in the utility model embodiment, the small-sized single-side isolation and gain flat mixed integrated device comprises a pin assembly 1 and a lens assembly 2, the pin assembly 1 is connected with the lens assembly 2 through a bridge pipe 3, the pin assembly 1, the lens assembly 2 and the bridge pipe 3 are externally provided with an outer sealing pipe 4; an input port 1011 and an output port 1012 of the pin assembly 1 are located at the same side outside the outer sealing pipe 4; wherein: light enters the pin assembly 1 from the input port 1011, is reflected in the lens assembly 2 after being transmitted to the lens assembly 2, and the reflected light is output from the output port 1012 through the pin assembly 1. Based on the above setting, the input port 1011 and the output port 1012 of the pin assembly 1 are arranged at the same side outside the outer sealing pipe 4, and the fiber is output from one side, so that the volume of the assembled module can be greatly saved.
[0034] In the above structure, the bridge pipe 3 is used for coupling and assembling two assemblies; the outer sealing pipe 4 is a metal steel pipe, which is used for sealing welding of the whole device to improve the product sealing level.
[0035] Referring to Figure 2 , Figure 3 and Figure 4 As shown in the utility model embodiment, in some embodiments, the pin assembly 1 comprises a double-core pin 101, a beam splitter 102 and a half-wave plate 103, wherein the beam splitter 102 is arranged on the side of the double-core pin 101 away from the input port 1011 and the output port 1012, the half-wave plate 103 is arranged on the side of the beam splitter 102 away from the double-core pin 101, and the half-wave plate 103 is arranged on the input light path.
[0036] In some embodiments, the double-core pin 101 is provided with a tail seat 1013 at the tail end, and the input port 1011 and the output port 1012 are arranged outside the tail seat 1013. The double-core pin 101 further comprises an input optical fiber 1014 and an output optical fiber 1015, the input optical fiber 1014 passes through the input port 1011, and the output optical fiber 1015 passes through the output port 1012. In some embodiments, the input and output light paths of the double-core pin 101 are of a spacing type, and the tail seat 1013 is a metal tail seat.
[0037] In some embodiments, the diameter of the tail seat 1013 is greater than the diameter of other parts of the double-core pin 101, and referring to Figure 1 As shown in the utility model embodiment, one end of the outer sealing pipe 4 is fixed to the inner side of the tail seat 1013.
[0038] In some embodiments, the outer sealing tube 4 and the tail seat 1013 are fixed by laser welding. By laser welding the tube shell, the air tightness is high, the sealing performance is high, and it can be used in high temperature and high humidity environment; it can solve the technical problems of poor air tightness of conventional glue outer packaging structure and unsuitability for high strength external environment.
[0039] In the above structure, the double-core pin 101 is a pitch type double-core pin with a metal tail seat, used for input and output of optical signals. The beam splitter 102 is a birefringent crystal used for reflection of input optical signals. The half-wave plate 103 is used for reflection and transmission of input optical signals.
[0040] Referring to Figure 5 As shown in some embodiments, the lens assembly 2 includes a collimating lens 201, a Faraday rotator 202, a filter 203, and a magnetic ring 204. The collimating lens 201 is arranged on the side close to the pin assembly 1. The Faraday rotator 202 is arranged on the side of the collimating lens 201 away from the pin assembly 1. The filter 203 is arranged on the side of the Faraday rotator 202 away from the collimating lens 201. The magnetic ring 204 is arranged outside the collimating lens 201, the Faraday rotator 202, and the filter 203.
[0041] In some embodiments, the magnetic ring 204 is sleeved outside the collimating lens 201, the Faraday rotator 202, and the filter 203, or the magnetic ring 204 is bonded inside the outer sealing tube 4.
[0042] In some embodiments, the filter 203 is arranged at a preset angle, for example, 3-8 degrees. Designing the filter 203 at a certain angle can avoid the reflection of light into the output light path. The filter 203 can be designed according to different customer needs, such as shape and size, and the specific angle can be set according to the needs, which is not limited here.
[0043] In the above structure, the collimating lens 201 is a collimator lens used for light path collimation and output of optical signals. The Faraday rotator 202 is used for rotating the polarization direction of input polarized light. The filter 203 is a reflective dielectric film filter used for filtering the light path and reflecting it into the output light path. The magnetic ring 204 is a magnetic material used to provide a magnetic field for the Faraday rotator 202. The magnetic ring 204 can be designed in different sizes and different appearance structures.
[0044] Referring to Figure 6 As shown in some embodiments, one end of the bridge tube 3 is fixed to the collimating lens 201 of the lens assembly 2, and the other end of the bridge tube 3 is fixed to the double-core pin 101 of the pin assembly 1.
[0045] Specifically, referring to Figure 2 shown, first make the double-core spacing type pin with tail seat, that is, double-core pin 101, then bond the beam splitter 102 on the end face of the double-core pin 101 to make the double-core pin 101 with bonded beam splitter 102, referring to Figure 3 shown. Further align and bond the half-wave plate 103 on one optical fiber port of the double-core pin 101 to make the pin assembly 1, referring to Figure 4 shown.
[0046] Referring to Figure 5 shown, respectively bond the collimating lens 201, the Faraday rotator 202 and the filter 203 inside the magnetic ring 204. Here, the magnetic ring 204 can also be bonded inside the outer sealing tube 4 to form an external magnetic ring, or can be sleeved outside the three bonded assemblies.
[0047] Referring to Figure 6 shown, bond the made pin assembly 1 (that is, Figure 4 ) and the lens assembly 2 (that is, Figure 5 ) through the bridging tube 3 to make a semi-finished device. Referring to Figure 1 shown, finally weld the outer sealing tube 4 and the tail seat 1013 of the spacing type double-core pin 101 in the semi-finished device (that is, Figure 6 ) by laser to make a complete device, that is, Figure 1 shown device.
[0048] Finally, the optical path of the above structure is described as follows:
[0049] Referring to Figure 7 shown, light enters from the input port 1011 of the double-core pin 101, after the beam splitter 102, two beams of refracted light are generated, the two beams of refracted light pass through the half-wave plate 103 and are collimated by the collimating lens 201, then pass through the Faraday rotator 202 with a magnetic ring magnetic field, rotate counterclockwise along the optical axis, pass through the filter 203 and reflect, then pass through the Faraday rotator 202 with a magnetic ring magnetic field, rotate counterclockwise along the optical axis, pass through the collimating lens 201, and finally the two beams of refracted light pass through the beam splitter 102 to synthesize a beam of light from the output port 1012 of the double-core pin 101.
[0050] In summary, the utility model provides a kind of miniaturized single-side isolation and gain flat mixed integrated device, the input port and the output port of pin assembly are arranged at the same side outside outer sealing tube, by one side fiber output mode, the volume of assembled module is greatly saved.
[0051] Further, the utility model also welds outer sealing tube by laser welding tube shell, and the degree of airtightness is high, the sealing property is high, and can be used in high temperature and high humidity environment.
[0052] Further, the utility model adopts optical element is few, size is small, versatility is strong, flexibility is strong, cost is low, can batch manufacture, has very big significance to existing market.
[0053] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model. The contents not described in detail in the specification are the prior art known to the person skilled in the art.
Claims
1. A miniaturized hybrid integrated device with single-sided isolation and gain flatness, characterized in that, The assembly includes a pin assembly (1) and a lens assembly (2), which are connected by a bridge connector (3). An outer sealing tube (4) is provided outside the pin assembly (1), the lens assembly (2), and the bridge connector (3). The input port (1011) and the output port (1012) of the pin assembly (1) are located on the same side outside the outer sealing tube (4). Light enters the pin assembly (1) from the input port (1011), is transmitted to the lens assembly (2), is reflected in the lens assembly (2), and the reflected light passes through the pin assembly (1) again and is output from the output port (1012).
2. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 1, characterized in that, The ferrule assembly (1) includes a dual-core ferrule (101), a beam splitter (102), and a half-wave plate (103). The beam splitter (102) is disposed on the side of the dual-core ferrule (101) away from the input port (1011) and the output port (1012). The half-wave plate (103) is disposed on the side of the beam splitter (102) away from the dual-core ferrule (101) and is disposed on the input optical path.
3. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 2, characterized in that, The end of the dual-core pin (101) is provided with a tailstock (1013), and the input port (1011) and the output port (1012) are located outside the tailstock (1013).
4. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 3, characterized in that, The diameter of the tailstock (1013) is larger than the diameter of the other parts of the dual-core pin (101), and one end of the outer sealing tube (4) is fixed to the inner side of the tailstock (1013).
5. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 1, characterized in that, The lens assembly (2) includes a collimating lens (201), a Faraday rotator (202), a filter (203), and a magnetic ring (204). The collimating lens (201) is disposed on the side close to the pin assembly (1). The Faraday rotator (202) is disposed on the side of the collimating lens (201) away from the pin assembly (1). The filter (203) is disposed on the side of the Faraday rotator (202) away from the collimating lens (201). The magnetic ring (204) is disposed on the outside of the collimating lens (201), the Faraday rotator (202), and the filter (203).
6. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 5, characterized in that, The magnetic ring (204) is sleeved on the outside of the collimating lens (201), the Faraday rotator (202) and the filter (203), or the magnetic ring (204) is bonded to the inside of the outer sealing tube (4).
7. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 5, characterized in that, One end of the bridge connector (3) is fixed to the collimating lens (201) of the lens assembly (2), and the other end of the bridge connector (3) is fixed to the dual-core pin (101) of the pin assembly (1).
8. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 4, characterized in that, The outer sealing tube (4) and the tailstock (1013) are fixed by laser welding.
9. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 3, characterized in that, The input and output optical paths of the dual-core pin (101) are of the pitch type, and the tailpiece (1013) is a metal tailpiece.
10. The miniaturized hybrid integrated device with single-sided isolation and gain flatness according to claim 5, characterized in that, The filter (203) is set to a preset angle.