Mini integrated optical fiber dense wavelength division multiplexing device

Abstract

The utility model relates to a 3 * 6 mini integrated optical fiber dense wavelength division multiplexing device, which comprises an OD2.7 * L16mm large glass tube, two 2.1 * L6.5 mm glass tubes, a lens with a grain diameter gradually changing refractive index, a seven-optical-fiber pigtail and a dense wavelength division multiplexing filtering film layer, and the radial gradient refractive index lens, the seven-optical-fiber pigtail and the dense wavelength division multiplexing filter film layer form a filter seven-optical assembly. The 3 * 6 mini integrated optical fiber dense wavelength division multiplexing device is high in integration level, small in size, small in insertion loss, high in isolation degree, high in return loss, small in polarization dependent loss, excellent in directivity, stable in working performance and high in reliability. The method can be widely applied to optical fiber communication networks such as a DWDM network, a wavelength router, an optical fiber amplifier, a CATV optical fiber system, an OADM optical fiber system and the like, and has relatively outstanding applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical fiber system, concretely refers to a 3x6 mini type integrated optical fiber dense wavelength division multiplexing device. BACKGROUND

[0002] DWDM optical fiber system is an important component in optical communication, and its core device is dense wavelength division multiplexing device, which is expensive, generally 1x2 three-port structure, and large structure size; in order to overcome the above-mentioned shortcomings, the utility model provides a 3x6 integrated mini type dense wavelength division multiplexing device, uses multi-fiber pigtail, specially designed dense wavelength division multiplexing filter film layer lens or specially designed clens and glens and mini structure design, ensures its reliability under the premise of not affecting optical performance. SUMMARY

[0003] The utility model discloses a 3x6 mini type integrated optical fiber dense wavelength division multiplexing device, which overcomes the shortcomings of the prior art and provides a 3x6 mini type integrated optical fiber dense wavelength division multiplexing device.

[0004] In order to achieve the above object, the utility model provides a 3x6 mini type integrated optical fiber dense wavelength division multiplexing device, which specifically comprises the following:

[0005] The 3x6 mini type integrated optical fiber dense wavelength division multiplexing device has the following main features:

[0006] One OD2.7xL16mm large glass tube, two 2.1xL6.5mm glass tubes, one radial gradient refractive index lens, one seven-fiber pigtail, and a dense wavelength division multiplexing filter film layer, and the radial gradient refractive index lens, seven-fiber pigtail and dense wavelength division multiplexing filter film layer form a filter film seven light assembly.

[0007] Preferably, it further comprises a φ2.1mm three-fiber seven light collimator, the three-fiber seven light collimator contains a φ1.8mm large hole seven-fiber pigtail, the large hole diameter is 377um, and is used for penetrating into seven optical fibers with a cladding diameter of 125um, wherein the optical fiber type is SMF-28Ultra single mode optical fiber, the end face polishing angle is 8 degrees, and the film layer is coated with 1500-1600 antireflection film; and only optical fibers 1 to 3 are used in the seven optical fibers, and optical fibers 4 to 8 are cut at an angle of 8 degrees.

[0008] Preferably, the radial gradient refractive index lens has a diameter OD1.8mm, one end polishing angle 0 degrees, one end polishing angle 8 degrees, and is coated with 1500-1600 film layer, focusing constant 0.34, and intercept 0.245P.

[0009] Preferably, the large hole diameter of the seven-fiber pigtail is 377 um, used for penetrating into seven optical fibers with a cladding diameter of 125 um, only using optical fibers 1 to 6 of the seven optical fibers, and the tail of optical fiber 7 is cut at an angle of 8 degrees, wherein optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about optical fiber 7, and the optical fiber type is SMF-28 Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

[0010] Preferably, the three-fiber seven-light collimator is sealed by an outer diameter 2.1 x L6.5 mm glass tube, and the outer diameter 2.1 x L6.5 mm glass tube is used to fix a φ1.8 mm large hole seven-fiber pigtail and a φ1.8 mm radial gradient index lens.

[0011] The 3x6 mini integrated optical fiber dense wavelength division multiplexer device mainly comprises:

[0012] An outer diameter OD2.7 x L16 mm large glass tube, two outer diameter 2.1 x L6.5 mm glass tubes, a radial gradient index lens, a seven-fiber pigtail, a clens flat convex thick lens, and a dense wavelength division multiplexer filter.

[0013] Preferably, it also includes a φ2.1 mm three-fiber seven-light collimator, which contains a φ1.8 mm large hole seven-fiber pigtail with a large hole diameter of 377 um, used for penetrating into seven optical fibers with a cladding diameter of 125 um, only using optical fibers 1 to 3 of the seven optical fibers, and optical fibers 4 to 7 are cut at an angle of 8 degrees, and the optical fiber type is SMF-28 Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

[0014] Preferably, the clens flat convex thick lens has a curvature radius of 0.72 mm, a center length of 1.4 mm, an 8-degree polishing, a 0-degree polishing, and a 1500-1600 film layer coated on both end faces.

[0015] Preferably, the large hole diameter of the seven-fiber pigtail is 377 um, used for penetrating into seven optical fibers with a cladding diameter of 125 um, and using optical fibers 1 to 6 of the seven optical fibers, and the tail of optical fiber 7 is cut at an angle of 8 degrees, wherein optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about optical fiber 7, and the optical fiber type is SMF-28 Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

[0016] Preferably, the 0-degree angle of incidence AOI of the dense wavelength division multiplexer filter is +1.33 nm, and the size is 1.3 x 1.3 x 1.0 mm.

[0017] The 3*6 mini-type integrated optical fiber dense wavelength division multiplexing device is widely used in DWDM network, wavelength routing, optical fiber amplifier, CATV optical fiber system, OADM optical fiber system and other optical fiber communication networks, has a clever structure, can realize three-in-one integrated dense wavelength division multiplexing integration, and has small size and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure diagram of the 3*6 mini-type integrated optical fiber dense wavelength division multiplexing device scheme one of the utility model.

[0019] Figure 2 It is a structure diagram of the 3*6 mini-type integrated optical fiber dense wavelength division multiplexing device scheme two of the utility model.

[0020] Figure 3 It is a collimator end and filter film layer end structure schematic view of the 3*6 mini-type integrated optical fiber dense wavelength division multiplexing device scheme one of the utility model.

[0021] Figure 4 It is a collimator end and filter film layer end structure schematic view of the 3*6 mini-type integrated optical fiber dense wavelength division multiplexing device scheme two of the utility model.

[0022] REFERENCE NUMERALS

[0023] 1 Seven optical fiber pigtail

[0024] 2 0.245P Glens

[0025] 3 DWDM film layer

[0026] 4 OD2.1*L6.5mm glass tube

[0027] 5 OD2.7*L16mm glass tube

[0028] 6 0.247P Glens

[0029] 7 DWDM filter

[0030] 8 Clens DETAILED DESCRIPTION

[0031] In order to more clearly describe the technical content of the utility model, the following further description is made in combination with specific embodiments.

[0032] Before embodiments consistent with the present application are described in detail, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It should also be noted that, in the following description, the terms "including", "containing", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] Referring to Figure 1 The 3x6 mini-type integrated optical fiber dense wavelength division multiplexer device comprises:

[0034] a large glass tube with an outer diameter (OD) of 2.7xL16mm, two glass tubes with an outer diameter of 2.1xL6.5mm, a radial gradient refractive index lens, a seven-fiber pigtail, and a dense wavelength division multiplexing filter film layer, wherein the radial gradient refractive index lens, the seven-fiber pigtail, and the dense wavelength division multiplexing filter film layer form a filter piece seven-fiber assembly.

[0035] As a preferred embodiment of the present application, the three-fiber seven-fiber collimator comprises a large-hole seven-fiber pigtail with a diameter of φ1.8mm, wherein the large-hole diameter of the seven-fiber pigtail is 377um, and the seven-fiber pigtail is used to pass through seven optical fibers with a cladding diameter of 125um, and only optical fibers 1 to 3 are used in the seven optical fibers, and optical fibers 4 to 8 are cut at an angle of 8 degrees.

[0036] As a preferred embodiment of the present application, the radial gradient refractive index lens has a diameter of OD1.8mm, a polishing angle of 0 degrees at one end, a polishing angle of 8 degrees at the other end, and a film layer of 1500-1600, a focusing constant of 0.34, and an intercept of 0.245P.

[0037] As a preferred embodiment of the present application, the large-hole diameter of the seven-fiber pigtail is 377um, and the seven-fiber pigtail is used to pass through seven optical fibers with a cladding diameter of 125um, and only optical fibers 1 to 6 are used in the seven optical fibers, and the tail of optical fiber 7 is cut at an angle of 8 degrees, wherein optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about optical fiber 7, and the type of the optical fibers is SMF-28Ultra single-mode optical fiber, the end face polishing angle of which is 8 degrees, and the end face is coated with an anti-reflection film layer with a thickness of 1500-1600.

[0038] As a preferred embodiment of the present application, the three-fiber seven-fiber collimator is sealed by an outer diameter 2.1xL6.5mm glass tube, and the outer diameter 2.1xL6.5mm glass tube is used to fix the φ1.8mm large-hole seven-fiber pigtail and a radial gradient refractive index lens with a diameter of φ1.8mm.

[0039] Referring to Figure 2 As shown in the figure, the 3x6 mini-type integrated optical fiber dense wavelength division multiplexer device comprises:

[0040] One glass tube with an outer diameter of OD2.7xL16mm, two glass tubes with an outer diameter of 2.1xL6.5mm, one radial gradient refractive index lens, one seven-fiber pigtail, one clens flat-convex thick lens, and one dense wavelength division multiplexing filter.

[0041] As a preferred embodiment of the utility model, it further comprises one φ2.1mm three-fiber seven-light collimator, the three-fiber seven-light collimator contains one φ1.8mm large-hole seven-fiber pigtail, the large-hole diameter is 377um, and it is used for penetrating into seven optical fibers with a cladding diameter of 125um, only optical fibers 1 to 3 are used in the seven optical fibers, optical fibers 4 to 7 are all cut at an angle of 8 degrees, the optical fiber type is SMF-28Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

[0042] As a preferred embodiment of the utility model, the clens flat-convex thick lens has a curvature radius of 0.72mm, a center length of 1.4mm, one 8-degree polishing, one 0-degree polishing, and two end faces are coated with a 1500-1600 film layer.

[0043] As a preferred embodiment of the utility model, the large-hole diameter of the seven-fiber pigtail is 377um, and it is used for penetrating into seven optical fibers with a cladding diameter of 125um, and optical fibers 1 to 6 are used in the seven optical fibers, and the tail part of optical fiber 7 is cut at an angle of 8 degrees, wherein, optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about optical fiber 7, and the optical fiber type is SMF-28Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

[0044] As a preferred embodiment of the utility model, the 0-degree angle incidence AOI of the dense wavelength division multiplexing filter is +1.33nm, and the size is 1.3x1.3x1.0mm.

[0045] The utility model discloses the 3x6 mini-type integrated optical fiber dense wavelength division multiplexer device, and its scheme one structural diagram is as Figure 1It contains a large glass tube with an outer diameter of 2.7x length 16mm, two glass tubes with an outer diameter of 2.1x6.5mm, a focusing constant of 0.34, 0 degree angle end face coated with 1500-1600 film layer, 0.245P(pitch intercept), diameter OD1.8mm radial gradient refractive index lens, the surface is coated with dense wavelength division multiplexing filter film layer. Another focusing constant of 0.34, both ends coated with 1500-1600 film layer, 0.245P(pitch intercept), diameter OD1.8mm radial gradient refractive index lens.

[0046] The structural diagram of scheme two is shown in Figure 2

[0047] It contains a large glass tube with an outer diameter of 2.7x length 16mm, two glass tubes with an outer diameter of 2.1x6.5mm, a focusing constant of 0.34, one 8 degree polishing, one 0 degree polishing, both ends coated with 1500-1600 film layer, 0.247P(pitch intercept), diameter OD1.8mm radial gradient refractive index lens; A clens flat convex thick lens with a radius of curvature of 0.72mm and a center length of 1.4mm, one 8 degree polishing, one 0 degree polishing, and both ends coated with 1500-1600 film layer, a dense wavelength division multiplexing filter, which has an AOI of +1.33nm at 0 degree angle of incidence.

[0048] The technical scheme will be described in detail below:

[0049] Scheme one:

[0050] 1, a φ2.1mm three optical fiber seven light collimator, contains the following optical parts:

[0051] 1) its collimator contains a φ1.8mm large hole seven optical fiber tail fiber, the large hole diameter is 377um, can wear into 7 optical fibers with a cladding diameter of 125um, use optical fiber 1, 2, 3, the rest of the optical fiber 4, 5, 6, 7 are 8 degree angle cutting, the optical fiber type is SMF-28Ultra single mode optical fiber. Its end face polishing angle is 8 degrees, and is coated with 1500-1600 antireflection film layer.

[0052] 2) a φ1.8mm radial gradient refractive index lens, one end polishing angle is 0 degree, one end polishing angle is 8 degrees, and is coated with 1500-1600 film layer, focusing constant is 0.34, intercept is 0.245P(P=pitch intercept).

[0053] 3) a glass tube with an outer diameter of 2.1x length 6.5mm. See Figure 3 .

[0054] ​2, a seven optical fiber pigtail, a particle φ1.8mm radial gradient index lens + surface coated with dense wavelength division multiplexing filter film layer composition filter seven light components, and a set of outer diameter 2.1x length 6.5mm glass tube, containing the following optical parts:

[0055] 1) seven optical fiber pigtail, the large hole diameter is 377um, can be worn into 7 cladding diameter of 125um optical fiber, using optical fiber 1, 2, 3, 4, 5, 6, 7 optical fiber tail 8 degree angle cutting, optical fiber 1 and 4 about optical fiber 7 symmetry, 2 and 5 about optical fiber 7 symmetry, 3 and 6 about optical fiber 7 symmetry, optical fiber type is SMF-28Ultra single mode fiber. Its end face polishing angle 8 degrees, and coated film 1500~1600 antireflection film layer.

[0056] 2) a particle φ1.8mm radial gradient index lens, focusing constant 1500~1600 film layer focusing constant 0.34, intercept 0.245P(pitch intercept). One end polishing angle 8 degrees, one end light angle 0 degrees, the surface is coated with dense wavelength division multiplexing filter film layer.

[0057] 3) a 2.1x length 6.5mm small glass tube.

[0058] 3, a 2.7x length 16mm glass tube, see Figure 1 .

[0059] The scheme two adopted by the utility model is:

[0060] 1, a φ2.1mm three optical fiber seven light collimator, containing the following optical parts:

[0061] 1) its collimator contains a φ1.8mm large hole seven optical fiber pigtail, the large hole diameter is 377um, can be worn into 7 cladding diameter of 125um optical fiber, using optical fiber 1, 2, 3, the rest of the optical fiber 4, 5, 6, 7 are 8 degree angle cutting, optical fiber type is SMF-28Ultra single mode fiber. Its end face polishing angle 8 degrees, and coated film 1500~1600 antireflection film layer.

[0062] 2) a particle clens flat convex thick lens, curvature radius 0.72mm, center length 1.4mm, one 8 degree polishing, one 0 degree polishing, and two end face 1500~1600 film layer.

[0063] 3) a 2.1x length 6.5mm glass tube.

[0064] 2, a seven optical fiber pigtail, a particle φ1.8mm radial gradient index lens, a particle dense wavelength division multiplexer filter composition filter seven light components, and a set of outer diameter 2.1x length 6.5mm glass tube, containing the following optical parts:

[0065] 1) seven fiber pigtail, its big hole diameter is 377um, can wear into 7 cladding diameter 125um optical fiber, uses optical fiber 1, 2, 3, 4, 5, 6, optical fiber 7 tail 8 degree angle cutting, optical fiber 1 and 4 are symmetrical about optical fiber 7, 2 and 5 are symmetrical about optical fiber 7, 3 and 6 are symmetrical about optical fiber 7, and the optical fiber type is SMF-28Ultra single mode optical fiber. Its end face polishing angle is 8 degrees, and is coated with 1500-1600 antireflection film layer.

[0066] 2) a φ1.8mm radial gradient index lens, the focusing constant of 1500-1600 film layer is 0.34, the intercept is 0.247P (pitch intercept). One end polishing angle is 8 degrees, one end light angle is 0 degrees, and is coated with 1500-1600 film layer.

[0067] 3) a dense wavelength division multiplexing filter, the 0 degree angle incidence AOI is +1.33nm, and the size is 1.3*1.3*1.0mm.

[0068] 4) a small size glass tube with an outer diameter of 2.1*length 6.5mm.

[0069] 3, a glass tube with an outer diameter of 2.7*length 16mm.

[0070] In practical application, the technical scheme has the following technical effects:

[0071] 1, the size of the 3*6 mini type integrated optical fiber dense wavelength division multiplexing device can reach 2.7*length 20mm.

[0072] 2, the 3*6 mini type integrated optical fiber dense wavelength division multiplexing device has two design schemes, strong variability, lens, wide selection range of film layer.

[0073] 3, the 3*6 mini type integrated optical fiber dense wavelength division multiplexing device has high integration, and can be three in one.

[0074] The 3*6 mini type integrated optical fiber dense wavelength division multiplexing device has high integration, small size, small insertion loss, high isolation, high return loss, small polarization dependent loss, excellent directivity, stable working performance and high reliability. It can be widely used in DWDM network, wavelength routing, optical fiber amplifier, CATV optical fiber system, OADM optical fiber system and other optical fiber communication network.

[0075] In this specification, the utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and changes can be made without departing from the spirit and scope of the utility model. Therefore, the specification and drawings should be considered as illustrative rather than restrictive.

Claims

1. A 3 x 6 mini-type integrated optical fiber dense wavelength division multiplexing device, characterized by, It includes: A OD2.7xL16mm large glass tube, two 2.1xL6.5mm glass tubes, a radial gradient index lens, a seven optical fiber pigtail, and a dense wavelength division multiplexing filter film layer, and the radial gradient index lens, seven optical fiber pigtail and dense wavelength division multiplexing filter film layer form a filter seven light assembly.

2. The 3 x 6 mini-type integrated optical fiber dense wavelength division multiplexing device according to claim 1, characterized in that, It also includes a φ2.1mm three optical fiber seven light collimator, the three optical fiber seven light collimator contains a φ1.8mm large hole seven optical fiber pigtail, the large hole diameter is 377um, used for penetrating into 7 optical fibers with a cladding diameter of 125um, wherein only optical fibers 1-3 are used in the 7 optical fibers, and optical fibers 4-8 are cut at an angle of 8 degrees.

3. The 3 x 6 mini-type integrated optical fiber dense wavelength division multiplexing device according to claim 1, characterized in that, The radial gradient index lens has a diameter of OD1.8mm, a polishing angle of 0 degrees at one end, a polishing angle of 8 degrees at the other end, and is coated with a 1500-1600 film layer, a focusing constant of 0.34, and an intercept of 0.245P.

4. The 3 x 6 mini-type integrated optical fiber DWDM device according to claim 1, characterized in that, The large hole diameter of the seven optical fiber pigtail is 377um, used for penetrating into 7 optical fibers with a cladding diameter of 125um, only optical fibers 1-6 are used in the 7 optical fibers, and the tail of optical fiber 7 is cut at an angle of 8 degrees, wherein optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about optical fiber 7, and the type of optical fiber is SMF-28Ultra single mode optical fiber, the end face polishing angle is 8 degrees, and the film layer is coated with 1500-1600 antireflection film layer.

5. The 3 x 6 mini-type integrated optical fiber DWDM device according to claim 2, wherein, The three optical fiber seven light collimator is sealed by a 2.1xL6.5mm glass tube, which is used to fix the φ1.8mm large hole seven optical fiber pigtail and a φ1.8mm radial gradient index lens.

6. A 3 x 6 mini-type integrated optical fiber dense wavelength division multiplexing device, characterized by, It includes: A OD2.7xL16mm large glass tube, two 2.1xL6.5mm glass tubes, a radial gradient index lens, a seven optical fiber pigtail, and a dense wavelength division multiplexing filter film layer, and the radial gradient index lens, seven optical fiber pigtail and dense wavelength division multiplexing filter film layer form a filter seven light assembly.

7. The 3 x 6 mini-type integrated optical fiber dense wavelength division multiplexing device according to claim 6, characterized in that, It also includes a φ2.1mm three optical fiber seven light collimator, the three optical fiber seven light collimator contains a φ1.8mm large hole seven optical fiber pigtail, the large hole diameter is 377um, used for penetrating into 7 optical fibers with a cladding diameter of 125um, wherein only optical fibers 1-3 are used in the 7 optical fibers, and optical fibers 4-8 are cut at an angle of 8 degrees.

8. The 3 x 6 mini-type integrated optical fiber DWDM device according to claim 6, characterized in that, The clens flat convex thick lens has a curvature radius of 0.72mm, a center length of 1.4mm, an 8 degree polishing, a 0 degree polishing, and two end faces coated with a 1500-1600 film layer.

9. The 3 x 6 mini-type integrated optical fiber DWDM device according to claim 6, characterized in that, The large hole diameter of the seven-fiber pigtail is 377um, used for penetrating into seven cladding diameter 125um optical fibers, and the optical fibers 1 to 6 are used in the seven optical fibers, and the tail of the optical fiber 7 is cut at an angle of 8 degrees, wherein the optical fibers 1 and 4, 2 and 5, and 3 and 6 are symmetrical about the optical fiber 7, and the optical fiber type is SMF-28Ultra single-mode optical fiber, the end face polishing angle is 8 degrees, and a 1500-1600 antireflection film layer is coated.

10. The 3 x 6 mini-type integrated optical fiber DWDM device according to claim 6, characterized in that, The 0-degree angle incidence AOI of the particle dense wavelength division multiplexing filter is +1.33nm, and the size is 1.3*1.3*1.0mm.

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