Ultra-high power mini faraday rotator mirror structure

Abstract

The utility model relates to a kind of ultra-high power mini-type faraday rotating mirror structure, including single-mode single optical fiber pigtail, self-focusing lens, mini magnetic ring, glass tube, outer envelope tube and black silica gel, the end face of single-mode single optical fiber pigtail is 8 degree angle grinding and polishing, and coated with corresponding working wavelength antireflection film layer, one side of self-focusing lens is 8 degree angle end face polishing and coated with corresponding antireflection film layer, the other side is 0 degree angle end face polishing, and coated with corresponding antireflection film layer, the 8 degree angle end face of single-mode single optical fiber pigtail is fixed with the 8 degree angle end face of self-focusing lens, glass tube is sleeved in the tail of single-mode single optical fiber pigtail, mini magnetic ring is sleeved in the 0 degree angle end face of self-focusing lens, outer envelope tube is sleeved in single-mode single optical fiber pigtail and self-focusing lens outside. Ultra-high power mini-type faraday rotating mirror structure of the utility model is adopted, and the packaging size is mini, reflection coupling loss is smaller, pigtail return loss is higher, reflection loss is small, polarization rotation precision is high, and is widely used in optical fiber communication field.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic sensing components, and more particularly to the field of Faraday reflectors, specifically referring to an ultra-high power miniature Faraday rotating mirror structure. Background Technology

[0002] Currently, to meet market demands, Faraday reflectors are developing towards ultra-high power, miniaturized size, low coupling loss, and precise control of the polarization rotation angle range. Common Faraday reflectors are relatively large in size, and their optical coupling adjustments are often rough, resulting in high coupling loss. This invention, a miniaturized ultra-high power Faraday rotator, overcomes this problem with its compact packaging and excellent optical parameters. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an ultra-high power miniature Faraday rotator structure that meets the requirements of low reflection coupling loss, high return loss, and high polarization rotation accuracy.

[0004] To achieve the above objectives, the structure of the ultra-high power miniature Faraday rotation mirror of this invention is as follows: The main features of this ultra-high power miniature Faraday rotator structure are as follows: the structure includes a single-mode single-fiber pigtail, a self-focusing lens, a miniature magnetic ring, a glass tube, an outer sealing tube, and black silicone. The end face of the single-mode single-fiber pigtail is ground and polished at an 8-degree angle and coated with an anti-reflection film of the corresponding working wavelength. One side of the self-focusing lens is polished at an 8-degree angle and coated with an anti-reflection film, while the other side is polished at a 0-degree angle and coated with an anti-reflection film. The 8-degree end face of the single-mode single-fiber pigtail is fixed to the 8-degree end face of the self-focusing lens. The glass tube is fitted over the tail of the single-mode single-fiber pigtail. The miniature magnetic ring is fitted over the 0-degree end face of the self-focusing lens. The outer sealing tube is fitted over the single-mode single-fiber pigtail and the self-focusing lens, and also over the glass tube. The black silicone fills the other end of the outer sealing tube.

[0005] Preferably, the single-mode single-fiber pigtail includes a single-mode fiber and A single-mode fiber capillary, wherein the single-mode fiber comprises an innermost single-mode fiber core, a cladding, and an outermost coating layer, and a stripping end is provided between the cladding and the coating layer of the single-mode fiber, and is disposed in the horn of a mini single-light capillary.

[0006] Preferably, the multimode optical fiber includes an innermost multimode fiber core, a cladding, and an outermost coating layer, wherein the cladding of the single-mode fiber and the cladding of the multimode fiber are fused together to form a hybrid optical fiber.

[0007] Preferably, the mini magnetic ring includes a stepped small circular ring, a Faraday rotator plate, and a reflector. The Faraday rotator plate and the stepped small circular ring are both disposed inside the mini magnetic ring. The Faraday rotator plate is installed at the step of the stepped small circular ring, and the reflector rests against the mini stepped small circular ring.

[0008] Preferably, the single-mode single-fiber pigtail further includes UV adhesive, and the single-mode single-fiber pigtail and the self-focusing lens are fixed together by UV adhesive, and the glass tube and the outer sealing tube are fixed together by UV adhesive.

[0009] Preferably, the single-mode single-fiber pigtail further includes a low-refractive-index UV-curing adhesive and an epoxy resin adhesive. The low-refractive-index UV-curing adhesive wraps around a stripped opening (15) between the cladding and coating layers of the single-mode fiber (12), surrounding the flared end of the mini single-light capillary (17). The epoxy resin adhesive (10) fills the remaining space at the flared end of the mini single-light capillary (17). Preferably, the single-mode single-fiber pigtail further includes a high-refractive-index UV-curing adhesive, which is applied to the edge of the flared end of the mini single-light capillary.

[0010] Preferably, the structure further includes epoxy resin adhesive, and the mini magnetic ring and self-focusing lens are fixed by epoxy resin adhesive.

[0011] Preferably, the single-mode single-fiber pigtail has a diameter of 1.0 mm and a length of 3.5 mm, the self-focusing lens has a diameter of 1.0 mm, the glass tube has a diameter of 1.4 mm and a length of 5 mm, and the outer sealing tube has a diameter of 1.8 mm and a length of 12 mm.

[0012] Preferably, the intercept length of the self-focusing lens is 0.25 pitch, controlled within the range of 0.248 to 0.249, and the gap between the 8-degree end face of the single-mode single-fiber pigtail and the 8-degree end face of the self-focusing lens is 0.024 mm.

[0013] The ultra-high power miniature Faraday rotator structure of this invention has a miniature package size, low reflection coupling loss (below 0.4dB), high fiber return loss (above 65dB), low reflection loss, high polarization rotation accuracy, and the optical rotation angle of the reflected light is accurate within 45+ / -1 degree. It can be widely used in the field of optical fiber communication. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the ultra-high power miniature Faraday rotation mirror of this utility model.

[0015] Figure 2This is a schematic diagram of the single-beam pigtail and self-focusing lens assembly of the ultra-high power miniature Faraday rotation mirror structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the magnetic ring assembly of the ultra-high power miniature Faraday rotator mirror structure of this utility model.

[0017] Figure label: 1 Single-mode single-fiber pigtail 2. Focusing lens 3 Mini magnetic rings 4 Faraday Rotating Plate 5. Stepped small circular rings 6 glass tubes 7. External sealing tube 8. Reflectors 9. UV glue 10. Epoxy Resin Adhesive 11 Black Silicone 12 Single-mode optical fibers 13 Low-refractive-index UV-curing adhesive 14 High-refractive-index UV-curing adhesive 15. Peeling 16-mode fiber 17 Mini Single-Light Capillaries Detailed Implementation

[0018] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0019] This invention discloses an ultra-high power miniature Faraday rotator structure, comprising a single-mode single-fiber pigtail 1, a self-focusing lens 2, a miniature magnetic ring 3, a glass tube 6, an outer sealing tube 7, and black silicone 11. The end face of the single-mode single-fiber pigtail 1 is ground and polished at an 8-degree angle and coated with an anti-reflection film of the corresponding working wavelength. One side of the self-focusing lens 2 is polished at an 8-degree angle and coated with an anti-reflection film, while the other side is polished at a 0-degree angle and coated with an anti-reflection film. The 8-degree angle end face of the single-mode single-fiber pigtail 1 is fixed to the 8-degree angle end face of the self-focusing lens 2. The glass tube 6 is fitted around the tail of the single-mode single-fiber pigtail 1. The miniature magnetic ring 3 is fitted around the 0-degree angle end face of the self-focusing lens 2. The outer sealing tube 7 is fitted around the single-mode single-fiber pigtail 1 and the self-focusing lens 2, and also around the glass tube 6. The black silicone 11 fills the other end of the outer sealing tube 7.

[0020] In a preferred embodiment of this utility model, the single-mode single-fiber pigtail 1 includes a single-mode fiber 12 and The single-mode fiber capillary 17, wherein the single-mode fiber 12 includes an innermost single-mode fiber core, a cladding, and an outermost coating layer, and a stripping opening 15 is provided between the cladding and the coating layer of the single-mode fiber 12 and is located in the horn opening of the mini single-light capillary 17.

[0021] In a preferred embodiment of the present invention, the multimode optical fiber 16 includes an innermost multimode fiber core, a cladding, and an outermost coating layer. The cladding of the single-mode optical fiber 12 and the cladding of the multimode optical fiber 16 are fused together to form a hybrid optical fiber.

[0022] In a preferred embodiment of the present invention, the mini magnetic ring 3 includes a stepped small circular ring 5, a Faraday rotator plate 4, and a reflector 8. The Faraday rotator plate 4 and the stepped small circular ring 5 are both disposed inside the mini magnetic ring 3. The Faraday rotator plate 4 is installed at the step of the stepped small circular ring 5, and the reflector 8 rests against the mini stepped small circular ring 5.

[0023] In a preferred embodiment of the present invention, the single-mode single-fiber pigtail 1 further includes ultraviolet glue 9, and the single-mode single-fiber pigtail 1 and the self-focusing lens 2 are fixed together by ultraviolet glue 9, and the glass tube 6 and the outer sealing tube 7 are fixed together by ultraviolet glue 9.

[0024] As a preferred embodiment of the present invention, the single-mode single-fiber pigtail 1 further includes a low-refractive-index UV-curing adhesive 13 and an epoxy resin adhesive 10. The low-refractive-index UV-curing adhesive 13 wraps around a stripped opening (15) between the cladding and coating layers of the single-mode fiber (12) and surrounds the flared end of the mini single-light capillary (17). The epoxy resin adhesive (10) fills the remaining space of the flared end of the mini single-light capillary (17).

[0025] As a preferred embodiment of the present invention, the single-mode single-fiber pigtail 1 further includes a high-refractive-index UV-curable adhesive 14, which is coated on the flared edge of the mini single-light capillary 17.

[0026] In a preferred embodiment of the present invention, the structure further includes epoxy resin adhesive 10, and the mini magnetic ring 3 and the self-focusing lens 2 are fixed by epoxy resin adhesive 10.

[0027] In a preferred embodiment of this utility model, the single-mode single-fiber pigtail 1 has a diameter of 1.0 mm and a length of 3.5 mm, the self-focusing lens 2 has a diameter of 1.0 mm, the glass tube 6 has a diameter of 1.4 mm and a length of 5 mm, and the outer sealing tube 7 has a diameter of 1.8 mm and a length of 12 mm.

[0028] In a preferred embodiment of this utility model, the intercept length of the self-focusing lens 2 is 0.25 pitch, controlled within the range of 0.248~0.249, and the gap between the 8-degree end face of the single-mode single-fiber pigtail 1 and the 8-degree end face of the self-focusing lens 2 is 0.024 mm.

[0029] In a specific embodiment of this utility model, an ultra-high power miniature Faraday rotator is provided, characterized by low reflection coupling loss, high return loss, high polarization rotation accuracy, high load-bearing capacity, and miniature packaging. Figure 1 It includes an 8-degree angle One single-mode single-fiber pigtail with a design cutoff of 0.248p. 1. Self-focusing lens; 2. A miniature magnetic ring; 3. A Faraday rotator plate; 4. A stepped small ring; 5. A design. 6. Glass tube with special design 7. Outer sealing tube; 8. A mini reflector.

[0030] Single-mode single-fiber pigtail 1 consists of one single-mode fiber 12 and one... The single-mode fiber 12 is composed of a single-mode fiber capillary 17 and an outermost coating layer, consisting of an innermost single-mode fiber core, a cladding, and an outermost coating layer. Part of the coating layer is stripped away, exposing part of the cladding. A stripping opening 15 is formed between the cladding and coating layers of the single-mode fiber 12 within the flared end of the mini single-mode capillary 17. Low-refractive-index UV-curable adhesive 13 surrounds the stripping opening 15 between the cladding and coating layers of the single-mode fiber 12, and epoxy resin adhesive 10 fills the remaining flared end space to fix the single-mode fiber 12 at the flared end. The edge of the flared end of the mini single-mode capillary 17 is also coated with high-refractive-index UV-curable adhesive 14 as a protective adhesive for the fiber tail.

[0031] The multimode fiber 16 consists of an innermost multimode fiber core, a cladding, and an outermost coating layer. The coating layer is completely stripped off to expose the entire cladding layer, and then fused with the cladding layer of the single-mode fiber 12, merging the two fibers into a single hybrid fiber. The single-mode single-fiber pigtail is 3.5mm in length. The end face of the pigtail undergoes 8-degree surface grinding and polishing, and is coated with an antireflection film corresponding to the operating wavelength. Figure 1 As shown.

[0032] One side of the self-focusing lens 2 is polished at an 8-degree angle and coated with a corresponding anti-reflective coating, while the other side is polished at a 0-degree angle and coated with a corresponding anti-reflective coating. Self-focusing lens 2 is a radially graded self-focusing lens, Glens, such as Figure 2 . The self-focusing lens 2 increases its intercept length to a limit of 0.25 pitch, with a control range between 0.248 and 0.249. The corresponding gap between the 8-degree end face of the single-mode single-fiber pigtail 1 and the 8-degree end face of the self-focusing lens 2 is approximately 0.024 mm. Figure 2 As shown.

[0033] exist Single-mode single-fiber pigtail 1 and A type of UV adhesive 9 is pre-fixed between the self-focusing lenses 2. The UV adhesive 9 needs to cover the entire circumference of the gap, such as... Figure 2 .

[0034] exist The single-mode single-fiber pigtail has a special design at the tail sleeve. Glass tube 6.

[0035] A miniature magnetic ring 3 is fitted onto the 0-degree end face of the self-focusing lens 2 and fixed with an epoxy resin adhesive 10. Inside the miniature magnetic ring 3 is a miniature stepped small circular ring 5. A Faraday rotator plate 4 is mounted at the step of the miniature stepped small circular ring, and a reflecting mirror 8 rests against the miniature stepped small circular ring 5. Figure 3 .

[0036] The Faraday rotation plate 4 is made of a special garnet crystal, which can rotate optically by 45 + / - 1 degree.

[0037] The reflector 8 can be coated with the corresponding reflective film layer as needed to reflect the corresponding working wavelength.

[0038] In the fixed Single-mode single-fiber pigtail 1 and The self-focusing lens assembly has a special design. A glass tube 7 is fixed between the glass tube 6 and the outer sealing tube 7 by a UV adhesive 9. The other end of the outer sealing tube 7 is filled with black silicone 11.

[0039] The innovative aspects of the ultra-high power miniature Faraday rotator of this invention focus on high power tolerance, optical accuracy, and the compactness and miniaturization of the structure.

[0040] This invention utilizes a short segment of multimode fiber fused onto a single-mode fiber. The stripping joint between the cladding and coating layers of the single-mode fiber is surrounded by low-refractive-index adhesive, while high-refractive-index UV-curable adhesive is applied to the flared edge of the miniature single-light capillary, significantly improving power carrying capacity. This invention also employs a stepped small ring design, enhancing the overall optical precision of the device assembly and indirectly improving its compactness and miniaturization. This invention is applicable to 1060nm wavelength single-mode fiber, specifically HI1060 fiber. The applicable parameters for this invention are shown in the table below. ; For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0041] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0042] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The ultra-high power miniature Faraday rotator structure of this invention has a miniature package size, low reflection coupling loss (below 0.4dB), high fiber return loss (above 65dB), low reflection loss, high polarization rotation accuracy, and the optical rotation angle of the reflected light is accurate within 45+ / -1 degree. It can be widely used in the field of optical fiber communication.

[0045] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A structure for an ultra-high power miniature Faraday rotation mirror, characterized in that, The structure includes a single-mode single-fiber pigtail (1), a self-focusing lens (2), a mini magnetic ring (3), a glass tube (6), an outer sealing tube (7), and black silicone (11). The end face of the single-mode single-fiber pigtail (1) is ground and polished at an 8-degree angle and coated with an anti-reflection film of the corresponding working wavelength. One side of the self-focusing lens (2) is polished at an 8-degree angle and coated with an anti-reflection film, while the other side is polished at a 0-degree angle and coated with an anti-reflection film. The 8-degree end face of the single-mode single-fiber pigtail (1) is fixed to the 8-degree end face of the self-focusing lens (2). The glass tube (6) is sleeved on the tail of the single-mode single-fiber pigtail (1). The mini magnetic ring (3) is sleeved on the 0-degree end face of the self-focusing lens (2). The outer sealing tube (7) is sleeved on the outside of the single-mode single-fiber pigtail (1) and the self-focusing lens (2), and also on the outside of the glass tube (6). The black silicone (11) is filled at the other end of the outer sealing tube (7).

2. The ultra-high power miniature Faraday rotator structure according to claim 1, characterized in that, The single-mode single-fiber pigtail (1) includes a single-mode fiber (12) and 1.0 Single-mode fiber capillary (17), wherein the single-mode fiber (12) includes an innermost single-mode fiber core, a cladding and an outermost coating layer, and a stripping opening (15) is provided between the cladding and the coating layer of the single-mode fiber (12) and is located in the horn of the mini single-light capillary (17).

3. The ultra-high power miniature Faraday rotator structure according to claim 1, characterized in that, The structure includes a multimode fiber (16), which includes an innermost multimode fiber core, a cladding, and an outermost coating layer. The cladding of the single-mode fiber (12) and the cladding of the multimode fiber (16) are fused together to form a hybrid fiber.

4. The ultra-high power miniature Faraday rotator mirror structure according to claim 1, characterized in that, The mini magnetic ring (3) includes a stepped small ring (5), a Faraday rotator (4) and a reflector (8). The Faraday rotator (4) and the stepped small ring (5) are both disposed inside the mini magnetic ring (3). The Faraday rotator (4) is installed at the step of the stepped small ring (5), and the reflector (8) rests on the mini stepped small ring (5).

5. The ultra-high power miniature Faraday rotator structure according to claim 1, characterized in that, The single-mode single-fiber pigtail (1) also includes UV glue (9), and the single-mode single-fiber pigtail (1) and the self-focusing lens (2) are fixed together by UV glue (9), and the glass tube (6) and the outer sealing tube (7) are fixed together by UV glue (9).

6. The ultra-high power miniature Faraday rotator structure according to claim 2, characterized in that, The single-mode single-fiber pigtail (1) further includes a low-refractive UV-curing adhesive (13) and an epoxy resin adhesive (10). The low-refractive UV-curing adhesive (13) wraps around a stripped opening (15) between the cladding and coating of the single-mode fiber (12) and surrounds the flared end of the mini single-light capillary (17). The epoxy resin adhesive (10) fills the remaining space of the flared end of the mini single-light capillary (17).

7. The ultra-high power miniature Faraday rotator mirror structure according to claim 1, characterized in that, The single-mode single-fiber pigtail (1) also includes a high-refractive-index UV-curable adhesive (14), which is coated on the flared edge of the mini single-light capillary (17).

8. The ultra-high power miniature Faraday rotator structure according to claim 1, characterized in that, The structure also includes epoxy resin adhesive (10), and the mini magnetic ring (3) and the self-focusing lens (2) are fixed by epoxy resin adhesive (10).

9. The ultra-high power miniature Faraday rotator mirror structure according to claim 1, characterized in that, The single-mode single-fiber pigtail (1) has a diameter of 1.0 mm and a length of 3.5 mm, the self-focusing lens (2) has a diameter of 1.0 mm, the glass tube (6) has a diameter of 1.4 mm and a length of 5 mm, and the outer sealing tube (7) has a diameter of 1.8 mm and a length of 12 mm.

10. The ultra-high power miniature Faraday rotator structure according to claim 1, characterized in that, The self-focusing lens (2) has a cutoff length of 0.25 pitch, which is controlled within the range of 0.248 to 0.

249. The gap between the 8-degree end face of the single-mode single-fiber pigtail (1) and the 8-degree end face of the self-focusing lens (2) is 0.024 mm.

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