Compact single-mode single-fiber interferometer device

Abstract

The utility model relates to a kind of compact single-mode single optical fiber interferometer device, including single-mode tail fiber, one outer envelope tube, one glass tube, a self-focusing lens, the tail fiber end face of single-mode tail fiber has 8 degree grinding polishing, and is coated with the corresponding working wavelength antireflection film layer, the one side of the self-focusing lens is 8 degree angle polishing and coated with corresponding antireflection film layer, the other side is 0 degree angle polishing surface, the tail fiber end face of single-mode tail fiber is connected with the one side of 8 degree angle polishing of self-focusing lens, the tail of single-mode tail fiber is equipped with a glass tube, the outside of single-mode tail fiber and self-focusing lens is equipped with an outer envelope tube. Compact single-mode single optical fiber interferometer device using the utility model, packaging size is compact, deflection angle is smaller, tail fiber return loss is higher, interference reflection loss range is accurate, coupling loss is small, coupling loss is smaller, return loss is higher, interference reflection loss range is accurate, packaging is compact, can be widely applied in optical fiber communication field.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication, and more particularly to the field of optical fiber sensing components, specifically referring to a compact single-mode single-fiber interferometer device. Background Technology

[0002] Currently, to meet market demands, single-fiber interferometers are being developed towards miniaturization and smaller sizes, with lower coupling loss and precise control over the reflection loss range after interference. Common single-mode single-fiber interferometers are relatively large, and their optical coupling adjustments are often crude, resulting in higher coupling loss. This invention presents a compact single-mode single-fiber interferometer that overcomes this problem, featuring a compact package and excellent optical parameters. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compact single-mode single-fiber interferometer device that meets the requirements of accurate loss range, compact packaging, and wide applicability.

[0004] To achieve the above objectives, the compact single-mode single-fiber interferometer device of this invention is as follows:

[0005] The main features of this compact single-mode single-fiber interferometer device are as follows: the device includes a single-mode pigtail, an outer sealing tube, a glass tube, and a self-focusing lens. The end face of the single-mode pigtail is 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 the corresponding anti-reflection film, while the other side is polished at a 0-degree angle. The end face of the single-mode pigtail is connected to the 8-degree polished side of the self-focusing lens. A glass tube is fitted over the tail of the single-mode pigtail, and an outer sealing tube is fitted over both the single-mode pigtail and the self-focusing lens.

[0006] Preferably, the 0-degree polished surface of the self-focusing lens is coated with a corresponding anti-reflective film or a corresponding tap film.

[0007] Preferably, the device further includes silicone, with silicone filling the space between the outer sealing tube and the self-focusing lens.

[0008] Preferably, the device further includes epoxy resin adhesive, and the glass tube and the outer sealing tube are fixed together by epoxy resin adhesive.

[0009] Preferably, the device further includes UV adhesive, and the self-focusing lens is fixed to the single-mode pigtail by UV adhesive.

[0010] Preferably, the single-mode pigtail includes a single-mode optical fiber and a single-mode optical fiber capillary, wherein the single-mode optical fiber is placed in the single-mode optical fiber capillary, and the diameter of the single-mode optical fiber capillary is 1 mm.

[0011] Preferably, the single-mode fiber optic cable has a diameter of 1 mm and a length of 3 mm, the outer sealing tube has a diameter of 1.6 mm and a length of 9 mm, the glass tube has a diameter of 1.2 mm and a length of 4 mm, and the self-focusing lens has a diameter of 1 mm.

[0012] Preferably, the peripheral pitch length of the self-focusing lens is limited to 0.25 pitch, controlled within a range of 0.248 to 0.249, and the gap size is 0.005 to 0.100 mm.

[0013] The compact single-mode single-fiber interferometer device of this invention has a compact package size, a small deflection angle (down to below 0.35 degrees), a high pigtail return loss (up to 65dB), a precise range of reflection loss after interference, and low coupling loss. 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 compact single-mode single-fiber interferometer device of this utility model.

[0015] Figure 2 This is a schematic diagram of the single-mode single-fiber pigtail of the compact single-mode single-fiber interferometer device of this utility model.

[0016] Figure 3 This is a schematic diagram showing the 0-degree polished surface of the self-focusing lens of the compact single-mode single-fiber interferometer device of this invention coated with a tap film. (Scheme 1)

[0017] Figure 4 This is a schematic diagram of the tap filter attached to the 0-degree polished surface of the self-focusing lens of the compact single-mode single-fiber interferometer device of this invention. (Scheme 2)

[0018] Figure 5 This is a schematic diagram of the reflection interference principle of the compact single-mode single-fiber interferometer device of this utility model.

[0019] Figure label:

[0020] 1 Single-mode pigtail

[0021] 2. External sealing tube

[0022] 3 Glass tubes

[0023] 4 Self-focusing lenses

[0024] 5. Tap film layer (Option 1) (or Tap filter, which is Option 2)

[0025] 6 silicone

[0026] 7. Epoxy Resin Adhesive

[0027] 8. UV adhesive

[0028] 11 Antireflective coating layer of single-mode pigtail

[0029] 12 Anti-reflective coating on the 8-degree polished surface of a self-focusing lens

[0030] 13. Tape coating on the 0-degree polished surface of a self-focusing lens (Option 1)

[0031] 14. Tap filter attached to the 0-degree polished surface of the self-focusing lens (Solution 2)

[0032] 15. Anti-reflective coating on the 0-degree polished surface of the self-focusing lens (applicable to Scheme 2) Detailed Implementation

[0033] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0034] This utility model discloses a compact single-mode single-fiber interferometer device, which includes a single-mode pigtail 1, an outer sealing tube 2, a glass tube 3, and a self-focusing lens 4. The end face of the single-mode pigtail 1 is 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 4 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. The end face of the single-mode pigtail 1 is connected to the 8-degree polished side of the self-focusing lens 4. A glass tube 3 is fitted over the tail of the single-mode pigtail 1, and an outer sealing tube 2 is fitted over both the single-mode pigtail 1 and the self-focusing lens 4.

[0035] In a preferred embodiment of the present invention, the 0-degree polished surface of the self-focusing lens 4 is coated with a corresponding anti-reflective film or a corresponding tap film.

[0036] In a preferred embodiment of the present invention, the device further includes silicone 6, and silicone 6 is filled between the outer sealing tube 2 and the self-focusing lens 4.

[0037] In a preferred embodiment of the present invention, the device further includes epoxy resin adhesive 7, and the glass tube 3 and the outer sealing tube 2 are fixed together by epoxy resin adhesive 7.

[0038] In a preferred embodiment of the present invention, the device further includes UV glue 8, and the self-focusing lens 4 and the single-mode pigtail 1 are fixed together by UV glue 8.

[0039] In a preferred embodiment of the present invention, the single-mode pigtail 1 includes a single-mode optical fiber and a single-mode optical fiber capillary tube, wherein the single-mode optical fiber is placed in the single-mode optical fiber capillary tube, and the diameter of the single-mode optical fiber capillary tube is 1 mm.

[0040] In a preferred embodiment of this utility model, the single-mode pigtail 1 has a diameter of 1 mm and a length of 3 mm, the outer sealing tube 2 has a diameter of 1.6 mm and a length of 9 mm, the glass tube 3 has a diameter of 1.2 mm and a length of 4 mm, and the self-focusing lens 4 has a diameter of 1 mm.

[0041] In a preferred embodiment of this utility model, the peripheral pitch length of the self-focusing lens 4 is limited to 0.25 pitch, with a control range of 0.248 to 0.249, and the gap size is 0.005 to 0.100 mm.

[0042] This invention relates to a compact single-mode single-fiber interferometer. This single-mode single-fiber interferometer can be used in fiber optic sensing components of various large-scale equipment. It can be widely used in optical network devices, multi-channel optical signal monitoring, optical switching connection devices, fiber optic debugging and measurement devices, and other fields.

[0043] This invention provides a single-mode single-fiber interferometer with low coupling loss, high return loss, precise range of reflection loss after interference, and compact packaging. Figure 2 As shown, it includes an 8-degree angle 1. Single-mode pigtail, one with a specially designed perimeter. 4. Self-focusing lens, a single-tap mini filter, or a specially designed perimeter. The self-focusing lens 4 is coated with a corresponding Tap film layer 5, a special design. 3. Glass tube with special design 2. Outer casing tube. This utility model discloses a compact single-mode single-fiber interferometer with low coupling loss, high return loss, precise range of reflection loss after interference, and compact packaging, which can be widely used in the field of optical fiber communication.

[0044] In a specific embodiment of this utility model, Single-mode single-fiber pigtail 1 consists of one single-mode fiber and one... Single-mode fiber capillary components, such as Figure 2 , The single-mode single-fiber pigtail is 3mm in length. The end face of the pigtail is ground and polished at an 8-degree angle, and then coated with an antireflection film corresponding to the operating wavelength. Figure 2 As shown.

[0045] The self-focusing lens 4 is a Glens self-focusing lens with a special periodic design. The self-focusing lens 4 increases its pitch length to a limit of 0.25, with a control range of 0.248 to 0.249, thereby reducing the gap size to 0.005 to 0.100 mm, and consequently reducing the overall beam deflection.

[0046] The self-focusing lens 4 has one side polished at an 8-degree angle and coated with a corresponding anti-reflective film, and the other side polished at a 0-degree angle. If a tap filter is used (Solution 2), the 0-degree polished surface is coated with the corresponding anti-reflective film; if no tap filter is added, the corresponding tap film is directly coated on the 0-degree surface (Solution 1). Figure 3 As shown.

[0047] exist Single-mode single-fiber pigtail 1 and The self-focusing lenses 4 are permanently fixed together by a UV adhesive 8, such as... Figure 1 As shown.

[0048] exist The single-mode single-fiber pigtail has a special design at the tail sleeve. Glass tube 3.

[0049] In the fixed Single-mode single-fiber pigtail 1 and The self-focusing lens has a special design encased in its four components. The outer sealing tube 2 is fixed between the glass tube 3 and the outer sealing tube 2 by an epoxy resin adhesive 7. Silicone 6 is filled between the self-focusing lens 4 and the outer sealing tube 2.

[0050] This invention can be applied to 1550nm wavelength single-mode (single-mode fiber is...) Ultra fiber optic.

[0051] The main parameters of the compact single-mode single-fiber interferometer are as follows:

[0052]

[0053]

[0054] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The compact single-mode single-fiber interferometer device of this invention has a compact package size, a small deflection angle (down to below 0.35 degrees), a high pigtail return loss (up to 65dB), a precise range of reflection loss after interference, and low coupling loss. It can be widely used in the field of optical fiber communication.

[0059] 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 compact single-mode single-fiber interferometer device, characterized in that, The device includes a single-mode pigtail, an outer sealing tube, a glass tube, and a self-focusing lens. The end face of the single-mode pigtail is 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. The end face of the single-mode pigtail is connected to the 8-degree polished side of the self-focusing lens. A glass tube is fitted over the tail of the single-mode pigtail, and an outer sealing tube is fitted over both the single-mode pigtail and the self-focusing lens.

2. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The self-focusing lens has a corresponding anti-reflective coating or a corresponding tap coating on its 0-degree polished surface.

3. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The device also includes silicone, with silicone filling the space between the outer sealing tube and the self-focusing lens.

4. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The device also includes epoxy resin adhesive, which is used to fix the glass tube and the outer sealing tube together.

5. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The device also includes UV adhesive, which is used to fix the self-focusing lens to the single-mode fiber optic cable.

6. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The single-mode pigtail includes a single-mode optical fiber and a single-mode optical fiber capillary tube. The single-mode optical fiber is placed in the single-mode optical fiber capillary tube, and the diameter of the single-mode optical fiber capillary tube is 1 mm.

7. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The single-mode fiber optic cable has a diameter of 1 mm and a length of 3 mm, the outer sealing tube has a diameter of 1.6 mm and a length of 9 mm, the glass tube has a diameter of 1.2 mm and a length of 4 mm, and the self-focusing lens has a diameter of 1 mm.

8. The compact single-mode single-fiber interferometer device according to claim 1, characterized in that, The peripheral pitch length of the self-focusing lens is limited to 0.25 pitch, with a control range of 0.248 to 0.249, and the gap size is 0.005 to 0.100 mm.

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