Miniature GPON and XGPON passive wavelength division multiplexing assembly and preparation process thereof

Abstract

The invention discloses a miniature GPON and XGPON passive wavelength division multiplexing assembly, which comprises a bare fiber, a coated double-fiber capillary tube, a refraction lens, a coated filter, a ceramic ferrule, a collimating lens, a first glass tube, a second glass tube, a metal tube, an optical fiber connector and a metal ferrule, the preparation process comprises the steps of material preparation, optical fiber insertion, optical fiber coupling and fixing, double-fiber access and coupling, secondary coupling, flat cutting and grinding, finished product preparation and the like. By adopting the principle of middle wavelength transmission and two-end wavelength reflection, the product structure is compact and simple, the insertion loss is small, the use cost is low, batch production is easy, the transmission efficiency is high, and the use requirement is effectively met.

Description

Technical Field

[0001] The present invention belongs to the field of communication, and in particular relates to a micro GPON and XGPON passive wavelength division multiplexing component and a preparation process which has simple production and high efficiency, high transmission efficiency, low coupling difficulty and good use effect. Background Art

[0002] The combined optical network transmission of GPON and XGPON generally uses a single-fiber four-way structure, with one optical fiber as the light source and four directions for reception. This traditional single-fiber four-way structure can meet certain usage requirements, but it also has major defects. The overall structure is complex, the requirements for optical path design are high, the insertion loss is large, the cost of use is high, it is not easy to achieve mass production, the transmission efficiency is low, and it cannot effectively meet the usage requirements.

[0003] The technical problem to be solved by the present invention is to provide a micro GPON and XGPON passive wavelength division multiplexing component and a preparation process which has a simple and compact structure, low insertion loss, low use cost, easy batch production, high transmission efficiency and effectively meets the use requirements. Summary of the invention

[0004] In order to solve the problems of the above-mentioned prior art, such as complex overall structure, high requirements for optical path design, large insertion loss, high cost of use, difficulty in mass production, low transmission efficiency, and inability to effectively meet use requirements, the present invention adopts the following technical solution:

[0005] The present invention provides a micro GPON and XGPON passive wavelength division multiplexing component, comprising a bare optical fiber, a coated double-fiber capillary, a refractive lens, a coated filter, a ceramic ferrule, a collimating lens, a first glass tube, a second glass tube, a metal tube, an optical fiber connector and a metal ferrule, wherein the bare optical fiber is inserted into and fixed in the ceramic ferrule, the right side of the ceramic ferrule is ground into an 8° inclined surface and coated with an anti-reflection film, the collimating lens is optically coupled with the bare optical fiber and fixed on the right side of the ceramic ferrule, the first glass tube is sleeved on the ceramic ferrule and the collimating lens, the reflective surface of the coated filter is fixedly attached to the plane of the refractive lens, the coated double-fiber capillary is coupled and fixed on the inclined surface on the other side of the refractive lens, the second glass tube is sleeved on the coated double-fiber capillary, the collimating lens is arranged on the right side of the coated filter and the two are optically coupled, the metal tube is sleeved on the first glass tube and the second glass tube, and the optical fiber connector and the metal ferrule are respectively connected to the optical fiber of the coated double-fiber capillary.

[0006] A micro GPON and XGPON passive wavelength division multiplexing component preparation process, comprising: S1, preparing materials, preparing all raw materials, including G657A1 bare optical fiber, a coated double-fiber capillary with an inclined angle of 8° on one side and coated with a 1260-1610nm anti-reflection film, a 0.25nm intercept gradient refractive index lens with an inclined angle of 8° on one side, a coated filter with a reflection surface having a reflection wavelength of 1270&1577 and a transmission surface having a transmission wavelength of 1310&1490, a ceramic ferrule, a collimating lens with an inclined angle of 8° on one side and a curvature radius of 1.419, a first glass tube, a second glass tube, a metal tube, and an optical fiber connection Head, metal ferrule; S2, optical fiber insertion, insert the bare optical fiber into the ceramic ferrule, and cut off one end of the optical fiber, grind the end face of the ceramic ferrule on the cut side of the optical fiber into an angle of 8° and coat it with a 1260-1610nm full-band anti-reflection film. The semi-finished product obtained in this step is A2; S3, optical fiber coupling and fixing, the bevel end of the semi-finished product A2 obtained in step S2 is coupled with the collimating lens through a spot machine, the working distance of the collimating lens is controlled to 20mm, and after determining the working distance, A2 and the collimating lens are fixed with the first glass tube to obtain the semi-finished product A3; S4, dual-fiber access and coupling, first align the reflective surface of the filter with the flat surface of the refracting lens The surfaces of the two fibers are fixed together, and then one end of the inclined surface of the coated double-fiber capillary is connected to the inclined surface of the refracting lens and fixed, one of the two fibers is used as a common end, and the 1270&1577nm light source is coupled to the other optical fiber of the double fiber through the transmission and reflection principle of the optical fiber, lens and filter through the optical coupling alignment system, so that the 1270nm and 1577nm light are coupled to the other optical fiber of the double fiber and the insertion loss is controlled within 0.3dB, and then the second glass tube is set on the coated double-fiber capillary to obtain a semi-product A4; S5, secondary coupling, randomly select one end of the semi-product A4 obtained in step S4 as the common end, input a 1310 or 1490nm light source, and transmit through the reflection principle of the filter. The optical coupling alignment system is used to optically couple the dual fibers and the A3 single fiber obtained in step S3, and the insertion loss value of the 1310 or 1490 nm light source at the transmission end is monitored by an optical power meter. The insertion loss value is less than 0.3 dB, and then the two glass tubes are sheathed with a metal tube and fixed to obtain a semi-finished A5; S6, cutting and grinding, the end of the semi-finished A5 single fiber obtained in step S5 is cut off flush, and the cut plane is ground into an 8° inclined surface with a grinder to obtain a semi-finished A6; S7, the finished product is obtained, and the common end of the semi-finished A6 obtained in S6 is added with an optical fiber connector, and the reflective end can be added with a metal ferrule, and can also be configured according to actual use requirements to obtain a finished product.

[0007] The beneficial effects of the present invention are: adopting the principle of middle wavelength transmission and two end wavelength reflection, the product structure is compact and simple, the insertion loss is small, the use cost is low, it is easy to mass produce, the transmission efficiency is high, and the use requirements are effectively met. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The figure is a schematic structural diagram of an embodiment of the present invention.

[0009] Figure 2 It is a schematic diagram of step S1 in the present invention.

[0010] Figure 3 It is a schematic diagram of step S2 in the present invention.

[0011] Figure 4 It is a schematic diagram of step S3 in the present invention.

[0012] Figure 5 It is a schematic diagram of step S4 in the present invention.

[0013] Figure 6 It is a schematic diagram of step S5 in the present invention.

[0014] Figure 7 It is a schematic diagram of step S6 in the present invention. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, a micro GPON and XGPON passive wavelength division multiplexing component includes a bare optical fiber 1, a coated double-fiber capillary 2, a refractive lens 3, a coated filter 4, a ceramic ferrule 5, a collimating lens 6, a first glass tube 7, a second glass tube 5, a metal tube 9, an optical fiber connector 10 and a metal ferrule 11. The bare optical fiber 1 is inserted into the ceramic ferrule 5 and fixed. The right side of the ceramic ferrule 6 is ground into an 8° inclined surface and coated with an anti-reflection film. The collimating lens 6 is optically coupled with the bare optical fiber 1 and fixed on the right side of the ceramic ferrule 5. The first glass tube 7 is a second glass tube 5. The metal tube 9 is a fiber optic connector 10 and a metal ferrule 11. The glass tube 7 is sleeved on the ceramic ferrule 5 and the collimating lens 6, the reflecting surface of the coated filter 4 is fixed to the plane of the refracting lens 3, the coated double-fiber capillary 2 is coupled and fixed on the inclined surface on the other side of the refracting lens 3, the second glass tube 8 is sleeved on the coated double-fiber capillary 2, the collimating lens 6 is arranged on the right side of the coated filter 4 and the two are optically coupled, the metal tube 9 is sleeved on the first glass tube 7 and the second glass tube 8, and the optical fiber connector 10 and the metal ferrule 11 are respectively connected to the optical fiber of the coated double-fiber capillary 2.

[0017] A micro GPON and XGPON passive wavelength division multiplexing component preparation process, including S1, preparing materials, preparing all raw materials, such as Figure 2As shown, it includes a G657A1 bare optical fiber, a coated double-fiber capillary with an angle of 8° on one side and coated with an anti-reflection film of 1260-1610nm, a 0.25nm intercept gradient refractive index lens with an angle of 8° on one side, a coated filter with a reflection wavelength of 1270&1577 on the reflection surface and a transmission wavelength of 1310&1490 on the transmission surface, a ceramic ferrule, a collimating lens with an angle of 8° on one side and a curvature radius of 1.419, a first glass tube, a second glass tube, a metal tube, an optical fiber connector, and a metal ferrule; S2, optical fiber insertion, as shown Figure 3 As shown, insert the bare optical fiber into the ceramic ferrule, cut off one end of the optical fiber, grind the end face of the ceramic ferrule on the cut side of the optical fiber to an angle of 8° and coat it with a 1260-1610nm full-band anti-reflection film. The semi-finished product obtained in this step is A2; S3, the optical fiber coupling is fixed, as shown in Figure 4 As shown, the bevel end of the semi-finished product A2 obtained in step S2 is coupled with the collimating lens through a spot machine, and the working distance of the collimating lens is controlled to be 20 mm. After the working distance is determined, A2 and the collimating lens are fixed with the first glass tube to obtain the semi-finished product A3; S4, dual-fiber access and coupling, as shown Figure 5 As shown, first fix the reflective surface of the filter and the plane of the refractive lens together, then connect and fix one end of the inclined surface of the coated double-fiber capillary with the inclined surface of the refractive lens, use one of the double fibers as the common end, and use the optical coupling alignment system to couple the 1270nm and 1577nm light sources to the other optical fiber of the double fiber through the transmission and reflection principle of the optical fiber, lens and filter, so that the 1270nm and 1577nm light are coupled to the other optical fiber of the double fiber and the insertion loss is controlled within 0.3dB, and then the second glass tube is set on the coated double-fiber capillary to obtain the semi-product A4; S5, secondary coupling, as shown Figure 6 As shown, one end of the semi-finished A4 obtained in step S4 is randomly selected as the common end, and a 1310 or 1490 nm light source is input. The dual fibers and the A3 single fiber obtained in step S3 are optically coupled through a transmission coupling alignment system. The insertion loss value of the 1310 or 1490 nm light source at the transmission end is monitored by an optical power meter. The insertion loss value is less than 0.3 dB. Then, a metal tube is used to cover the two glass tubes and fix them to obtain a semi-finished A5. S6, cutting and grinding, as shown in FIG. Figure 7 As shown, the end of the semi-finished A5 single fiber obtained in step S5 is cut off flush, and the cut surface is grinded into an 8° inclined surface with a grinder to obtain a semi-finished A6; S7, a finished product is obtained, and a fiber optic connector is added to the common end of the semi-finished A6 obtained in S6, and a metal ferrule can be added to the reflective end, such as Figure 1 As shown, it can also be configured according to actual use requirements to obtain a finished product.

[0018] The present invention adopts the principle of first-order transmission and reflection, and the insertion loss is greatly reduced, which is only half of the traditional single-fiber four-way, thus greatly improving the transmission efficiency. The intermediate wide-band full-pass design fully transmits 1310-1490nm and fully reflects the remaining wavelengths, with only first-order transmission and reflection. The traditional single-fiber four-way adopts conventional filters using coating jump chip technology, and 1270 / 1577nm is extracted separately as the transmission wavelength, and then the 1310 / 1490nm wavelength is reflected back. During coating, there are two sections of transmission that need to be processed separately, and the coating is difficult, requiring two levels of transmission plus one level of reflection. In addition, parallel light splitting is adopted, and then convergent light coupling is used to reduce the difficulty of coupling, so that the transmission end and the reflection end are realized with the same process.

[0019] The beneficial effects of the present invention are: adopting the principle of middle wavelength transmission and two end wavelength reflection, the product structure is compact and simple, the insertion loss is small, the use cost is low, it is easy to mass produce, the transmission efficiency is high, and the use requirements are effectively met.

[0020] The above embodiments do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A micro GPON and XGPON passive wavelength division multiplexing component, characterized in that: The invention comprises a bare optical fiber (1), a coated double-fiber capillary (2), a refractive lens (3), a coated filter (4), a ceramic ferrule (5), a collimating lens (6), a first glass tube (7), a second glass tube (8), a metal tube (9), an optical fiber connector (10) and a metal ferrule (11), wherein the bare optical fiber (1) is inserted into and fixed in the ceramic ferrule (5), the right side of the ceramic ferrule (5) is ground into an 8° inclined surface and coated with an anti-reflection film, the collimating lens (6) is optically coupled with the bare optical fiber (1) and fixedly arranged on the right side of the ceramic ferrule (5), the first glass tube (7) is sleeved on the ceramic ferrule (11), and the second glass tube (8) is sleeved on the second glass tube (9), and the optical fiber connector (10) is sleeved on the second glass tube (11). The optical fiber connector (10) and the optical fiber connector (11) are connected to the optical fiber of the coated double-fiber capillary (2). The optical fiber connector (10) and the optical fiber connector (11) are connected to the optical fiber of the coated double-fiber capillary (2).

2. The process for preparing a micro GPON and XGPON passive wavelength division multiplexing component according to claim 1, characterized in that: Including, S1, preparation of materials, preparing all raw materials, including G657A1 bare optical fiber, coated double-fiber capillary with an angle of 8° on one side and coated with 1260-1610nm anti-reflection film, 0.25nm intercept gradient refractive index lens with an angle of 8° on one side, coated filter with reflection wavelength of 1270&1577 on the reflection surface and transmission wavelength of 1310&1490 on the transmission surface, ceramic ferrule, collimating lens with an angle of 8° on one side and a curvature radius of 1.419, first glass tube, second glass tube, metal tube, optical fiber connector, metal ferrule; S2, optical fiber insertion, insert the bare optical fiber into Ceramic ferrule, and cut off one end of the optical fiber, grind the end face of the ceramic ferrule on the cut side of the optical fiber into an angle of 8° and coat it with a 1260-1610nm full-band anti-reflection film. The half-quality A2 obtained in this step is obtained; S3, optical fiber coupling and fixing, the bevel end of the half-quality A2 obtained in step S2 is coupled with the collimating lens through a spot machine, the working distance of the collimating lens is controlled to 20mm, and after determining the working distance, A2 and the collimating lens are fixed with the first glass tube to obtain the half-quality A3; S4, double-fiber access and coupling, first fix the reflective surface of the filter and the plane of the refracting lens together, and then fix the coated double-fiber capillary One end of the tube bevel is butted against the bevel of the refractive lens and fixed, one of the dual fibers is used as a common end, and the 1270 & 1577 nm light source is coupled to the other optical fiber of the dual fiber through the transmission and reflection principle of the optical fiber, lens and filter through the optical coupling alignment system, so that the 1270 nm and 1577 nm light are coupled to the other optical fiber of the dual fiber and the insertion loss is controlled within 0.3 dB, and then the second glass tube is set on the coated dual-fiber capillary to obtain a semi-finished product A4; S5, secondary coupling, randomly select one end of the semi-finished product A4 obtained in step S4 as the common end, input a 1310 or 1490 nm light source, and pass the transmission coupling alignment system , optically couple the dual fibers and the A3 single fiber obtained in step S3, monitor the insertion loss of the 1310 or 1490 nm light source at the transmission end with an optical power meter, the insertion loss value is less than 0.3 dB, and then use a metal tube to cover the two glass tubes and fix them to obtain a semi-finished A5; S6, cut and grind, cut off the end of the semi-finished A5 single fiber obtained in step S5 flush, and use a grinder to grind the cut surface into an 8° inclined surface to obtain a semi-finished A6; S7, obtain the finished product, add an optical fiber connector to the common end of the semi-finished A6 obtained in S6, and add a metal ferrule to the reflective end, or configure it according to actual usage requirements to obtain a finished product.

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