Device for realizing reinforced multi-path integrated mini band-pass filtering isolator

Abstract

The utility model relates to a device for realizing a reinforced multipath integrated mini band-pass filtering isolator, one end of the device is a seven-fiber collimator, the other end of the device is a seven-fiber collimator and band-pass filtering plate assembly, seven optical tail fibers of the seven-fiber collimator and the band-pass filtering plate assembly are provided with seven optical fibers in a penetrating manner, and the seven optical tail fibers are input ends; the band-pass filter is mounted on the reinforcing bracket; seven optical fibers penetrate through seven optical pigtails of the seven-optical-fiber collimator and are output ends, and the input ends of the seven optical pigtails of the seven-optical-fiber collimator and the band-pass filter assembly are in one-to-one correspondence with the output ends of the seven optical pigtails of the seven-optical-fiber collimator. By adopting the device for realizing the reinforced multipath integrated mini band-pass filtering isolator, the device has excellent optical properties such as very small insertion loss, higher isolation and the like, higher reliability, high coaxiality, strong linearity, mini size and accurate packaging, and can be widely applied to the field of optical fiber communication.

Description

Technical Field

[0001] The utility model relates to the field of optical communication industry, in particular to the field of bandpass filters, and specifically refers to a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator. Background Art

[0002] At present, the appearance package size of the bandpass filter is OD5.5×34mm, the device size is relatively large, the ports are few, the integration is low, and the structure is asymmetric; the utility model overcomes the above problems with a reinforced multi-channel integrated mini bandpass filter isolator device. Through the symmetric characteristics of the multi-light capillary and the characteristics of the longer front focal intercept of the plano-convex lens, 4×4 and 7×7 multi-channel integrated bandpass filter devices are designed, and a metal sleeve is designed to reinforce the overall structure of the device, so that the device has excellent optical performance such as very small insertion loss and high isolation and high reliability. And by compressing the inner and outer diameters of the glass tube, the device is miniaturized. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator with good performance, good reliability and a wide range of applications.

[0004] In order to achieve the above-mentioned purpose, the device for realizing the reinforced multi-channel integrated mini bandpass filter isolator of the utility model is as follows:

[0005] The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator has the following main features: one end of the device is a multi-fiber collimator, and the other end is a multi-fiber collimator and bandpass filter assembly, the multi-fiber collimator and bandpass filter assembly comprises a multi-light pigtail, a first plano-convex lens, a reinforcement support, a bandpass filter and a first glass tube, one end of the multi-light pigtail of the multi-fiber collimator and bandpass filter assembly is connected to the first plano-convex lens, the multi-light pigtail of the multi-fiber collimator and bandpass filter assembly is penetrated by multiple optical fibers and all of them are input ends, one side of the first plano-convex lens is polished at 8 degrees and coated with a corresponding anti-reflection film layer, and the other side is a curved surface and coated with a corresponding anti-reflection film layer, the reinforcement support is fixed outside the curved surface of the first plano-convex lens, the bandpass filter is installed on the reinforcement support, and the first glass tube is installed outside the first plano-convex lens;

[0006] The multi-fiber collimator comprises a multi-optical pigtail, a second plano-convex lens and a second glass tube. One end of the multi-optical pigtail of the multi-fiber collimator is connected to the second plano-convex lens. The multi-optical pigtail of the multi-fiber collimator is penetrated by multiple optical fibers and all are output ends. The input end of the multi-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds to the output end of the multi-optical pigtail of the multi-fiber collimator one by one. One side of the second plano-convex lens has an 8-degree polishing and is coated with a corresponding anti-reflection film layer, and the other side is a curved surface and is coated with a corresponding anti-reflection film layer. The second glass tube is installed outside the second plano-convex lens.

[0007] Preferably, the multi-optical pigtail is a seven-optical pigtail, forming a 7×7 reinforced multi-channel integrated mini bandpass filter isolator device, the seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly is penetrated by seven optical fibers and are all input ends, the seven-optical pigtail of the multi-fiber collimator is penetrated by seven optical fibers and are all output ends, and the input ends of the seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly correspond one-to-one to the output ends of the seven-optical pigtail of the multi-fiber collimator.

[0008] Preferably, the multi-optical pigtail also supports a four-optical pigtail to form a 4×4 reinforced multi-channel integrated mini bandpass filter isolator device, the four-optical pigtail of the multi-fiber collimator and bandpass filter assembly is penetrated by four optical fibers and all are input ends, the four-optical pigtail of the multi-fiber collimator is penetrated by four optical fibers and all are output ends, and the input end of the four-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds one to one with the output end of the four-optical pigtail of the multi-fiber collimator.

[0009] Preferably, the end faces of the multi-optical pigtails of the multi-optical fiber collimator and bandpass filter assembly and the multi-optical pigtails of the multi-optical fiber collimator are both polished at an angle of 8 degrees and coated with corresponding anti-reflection film layers.

[0010] Preferably, the device further comprises a double-stage isolator core and an external glass tube, the multi-fiber collimator, the multi-fiber collimator and bandpass filter assembly and the double-stage isolator core are all fixed inside the external glass tube by ultraviolet glue, and the double-stage isolator core is located between the multi-fiber collimator and the multi-fiber collimator and bandpass filter assembly.

[0011] Preferably, the diameter of the seven-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 0.9nm, and the center length is 2.03mm; the front focal intercept of the curved surface of the first plano-convex lens is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.21mm; the radius of curvature of the second plano-convex lens is 0.9nm, and the center length is 1.78mm. One side of the second plano-convex lens is polished 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer. Its front focal intercept is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface.

[0012] Preferably, the diameter of the four-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 1.2nm, the center length is 2.74mm, the front focal intercept of the curved surface of the first plano-convex lens is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.61mm; the radius of curvature of the second plano-convex lens is 1.2nm, and the center length is 2.46mm. One side of the second plano-convex lens is polished at 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer. Its front focal intercept is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface.

[0013] Preferably, the outer diameter of the first glass tube is 2.2 mm and the length is 5 mm.

[0014] Preferably, the outer diameter of the second glass tube is 2.2 mm and the length is 6 mm.

[0015] Preferably, the outer diameter of the outer glass tube is 2.9 mm and the length is 16 mm.

[0016] The device of realizing the reinforced multi-channel integrated mini bandpass filter isolator of the utility model is adopted. Through the symmetric characteristics of the multi-light capillary and the characteristics of the longer front focal intercept of the plano-convex lens, 4×4 and 7×7 multi-channel integrated bandpass filter devices are designed, and metal sleeves are designed to reinforce the overall structure of the device, so that the device has excellent optical properties such as very small insertion loss and high isolation and high reliability. And by compressing the inner and outer diameters of the glass tube, the device is miniaturized. It has high coaxiality, strong linearity, mini size, and precise packaging, which can be widely used in the field of optical fiber communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1a This is a structural schematic diagram of solution 1 of a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0018] Figure 1bThis is a structural schematic diagram of Solution 2 of the device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0019] Figure 2a This is a schematic structural diagram of a seven-fiber collimator and a bandpass filter assembly of solution 1 of a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0020] Figure 2b This is a schematic structural diagram of a four-fiber collimator and a bandpass filter assembly of solution 2 of the device for realizing a reinforced multi-channel integrated mini bandpass filter isolator of the utility model.

[0021] Figure 3a This is a schematic structural diagram of a seven-fiber collimator in solution 1 of a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0022] Figure 3b This is a schematic structural diagram of a four-fiber collimator in Solution 2 of a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0023] Figure 4 It is a schematic diagram of a reinforcement support of a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to the utility model.

[0024] Reference numerals:

[0025] 1 Seven-fiber pigtail

[0026] 2 First Plano-Convex Lens

[0027] 3 Reinforcement support

[0028] 4 Bandpass filters

[0029] 5 Second Plano-Convex Lens

[0030] 6 Double-stage isolator core

[0031] 7 The First Glass Tube

[0032] 8 Second glass tube

[0033] 9 External glass tube

[0034] 10 Four-fiber pigtail DETAILED DESCRIPTION

[0035] In order to more clearly describe the technical content of the present invention, further description is given below in conjunction with specific embodiments.

[0036] The utility model discloses a device for realizing a reinforced multi-channel integrated mini bandpass filter isolator. One end of the device is a multi-fiber collimator, and the other end is a multi-fiber collimator and a bandpass filter assembly. The multi-fiber collimator and the bandpass filter assembly comprises a multi-light pigtail, a first plano-convex lens, a reinforcement support, a bandpass filter and a first glass tube. One end of the multi-light pigtail of the multi-fiber collimator and the bandpass filter assembly is connected to the first plano-convex lens. The multi-light pigtail of the multi-fiber collimator and the bandpass filter assembly is penetrated by multiple optical fibers and all of them are input ends. One side of the first plano-convex lens is polished at 8 degrees and coated with a corresponding anti-reflection film layer, and the other side is a curved surface and coated with a corresponding anti-reflection film layer. The reinforcement support is fixed outside the curved surface of the first plano-convex lens, the bandpass filter is installed on the reinforcement support, and the first glass tube is installed outside the first plano-convex lens.

[0037] The multi-fiber collimator comprises a multi-optical pigtail, a second plano-convex lens and a second glass tube. One end of the multi-optical pigtail of the multi-fiber collimator is connected to the second plano-convex lens. The multi-optical pigtail of the multi-fiber collimator is penetrated by multiple optical fibers and all are output ends. The input end of the multi-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds to the output end of the multi-optical pigtail of the multi-fiber collimator one by one. One side of the second plano-convex lens has an 8-degree polishing and is coated with a corresponding anti-reflection film layer, and the other side is a curved surface and is coated with a corresponding anti-reflection film layer. The second glass tube is installed outside the second plano-convex lens.

[0038] As a preferred embodiment of the utility model, the multi-optical pigtail is a seven-optical pigtail, which can form a 7×7 reinforced multi-channel integrated mini bandpass filter isolator device, the seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly is penetrated by seven optical fibers and are all input ends, the seven-optical pigtail of the multi-fiber collimator is penetrated by seven optical fibers and are all output ends, and the input ends of the seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly correspond one-to-one to the output ends of the seven-optical pigtail of the multi-fiber collimator.

[0039] As a preferred embodiment of the present utility model, the multi-optical pigtail also has a second scheme, that is, the multi-optical pigtail can also be a four-optical pigtail, which can form a 4×4 reinforced multi-channel integrated mini bandpass filter isolator device, the four-optical pigtail of the multi-fiber collimator and bandpass filter assembly is passed through four optical fibers and are all input ends, the four-optical pigtail of the multi-fiber collimator is passed through four optical fibers and are all output ends, and the input end of the four-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds one-to-one to the output end of the four-optical pigtail of the multi-fiber collimator.

[0040] As a preferred embodiment of the utility model, the end faces of the multi-light pigtails of the multi-fiber collimator and bandpass filter assembly and the multi-light pigtails of the multi-fiber collimator are polished at an angle of 8 degrees and are coated with corresponding anti-reflection film layers.

[0041] As a preferred embodiment of the utility model, the device also includes a double-stage isolator core and an external glass tube. The multi-fiber collimator, the multi-fiber collimator and bandpass filter assembly and the double-stage isolator core are all fixed inside the external glass tube by ultraviolet glue, and the double-stage isolator core is located between the multi-fiber collimator and the multi-fiber collimator and bandpass filter assembly.

[0042] As a preferred embodiment of the utility model, the diameter of the seven-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 0.9nm, the center length is 2.03mm, the front focal intercept of the curved surface of the first plano-convex lens is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.21mm; the radius of curvature of the second plano-convex lens is 0.9nm, and the center length is 1.78mm, one side of the second plano-convex lens is polished 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer, its front focal intercept is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface.

[0043] As a preferred embodiment of the utility model, the diameter of the four-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 1.2nm, the center length is 2.74mm, the front focal intercept of the curved surface of the first plano-convex lens is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.61mm; the radius of curvature of the second plano-convex lens is 1.2nm, and the center length is 2.46mm. One side of the second plano-convex lens is polished at 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer. Its front focal intercept is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface.

[0044] As a preferred embodiment of the present invention, the outer diameter of the first glass tube is 2.2 mm and the length is 5 mm.

[0045] As a preferred embodiment of the present invention, the outer diameter of the second glass tube is 2.2 mm and the length is 6 mm.

[0046] As a preferred embodiment of the present invention, the outer diameter of the outer glass tube is 2.9 mm and the length is 16 mm.

[0047] The utility model relates to a reinforced multi-channel integrated mini bandpass filter isolator device. In order to meet the high integration requirements of the modern optical communication industry, the reinforced multi-channel integrated mini bandpass filter isolator device is not only highly integrated, but also has excellent optical properties such as very small insertion loss and high isolation. It can be used in optical path systems and DWDM optical fiber systems that require compressed space. It can be widely used in optical network systems, multi-channel optical signal monitoring, optical switching connection systems, optical fiber debugging and measurement systems and other fields.

[0048] In the specific implementation of the utility model, in order to overcome the shortcomings and deficiencies of the prior art, a reinforced multi-channel integrated mini bandpass filter isolator device is provided, which has two schemes. Scheme 1 is a 7×7 multi-channel integrated bandpass filter device, and scheme 2 is a 4×4 multi-channel integrated bandpass filter device, as shown in Figure 1.

[0049] The first technical solution adopted by the utility model is a 7×7 multi-channel integrated bandpass filter device:

[0050] One end is a seven-fiber collimator and bandpass filter assembly, which includes: a Seven-fiber pigtail, with seven optical fibers, the end faces of which are polished at an angle of 8 degrees and coated with corresponding anti-reflection coating layers; optical fibers 1, 2, 3, 4, 5, 6, and 7 are Input 1, 2, 3, 4, 5, 6, and 7 ends, all of which are input ends.

[0051] The seven-fiber collimator and bandpass filter assembly also includes: a plano-convex lens Clens, with a curvature radius of R0.9 and a center length of 2.03mm; one side is polished 8 degrees and coated with a corresponding anti-reflection film layer, and the other side is also coated with a corresponding anti-reflection film layer, with a front focal intercept of 1.21mm, and the front focal focus is 1.21mm away from the center of the curved surface.

[0052] The seven-fiber collimator and bandpass filter assembly also includes a reinforced holder and a bandpass filter, and the effective space length inside is 1.21mm. Figure 4 ;

[0053] The seven-fiber collimator and bandpass filter assembly also includes an outer diameter × 5mm long glass tube. As shown in Figure 2.

[0054] The other end is: seven fiber collimators, which include: one Seven-light pigtail, and seven optical fibers are inserted, and the end faces are polished at an angle of 8 degrees and coated with corresponding anti-reflection coating layers; optical fibers 1', 2', 3', 4', 5', 6', 7' are Onput1', 2', 3', 4', 5', 6', 7', and are all output ends. The input ends Input1, 2, 3, 4, 5, 6, 7 and the output ends Output1', 2', 3', 4', 5', 6', 7' correspond one to one, for example, the optical signal can be coupled from the input end Input1 to the output end Output1', etc. The input ends Input1, 2, 3, 4, 5, 6, 7 and the output ends Output1', 2', 3', 4', 5', 6', 7' are symmetrical about the plano-convex lens Clens and the common front focus origin of the plano-convex lens Clens.

[0055] The seven-fiber collimator also includes: a plano-convex lens Clens, with a curvature radius of R0.9 and a center length of 1.78mm. One side is polished 8 degrees and coated with a corresponding anti-reflection film, and the other side is also coated with a corresponding anti-reflection film. Its front focal intercept is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface.

[0056] The seven-fiber collimator also includes: an outer diameter ×6mm long glass tube, as shown in Figure 3.

[0057] The 7×7 multi-channel integrated bandpass filter device also requires an outer diameter ×16mm long glass tube, after the transmission light power is coupled, a double-stage isolator core, seven fiber collimators plus bandpass filter ends and seven fiber collimators are fixed on the outer diameter by UV glue. × On a 16mm long glass tube.

[0058] Solution 2 4×4 multi-channel integrated bandpass filter device: one end is a seven-fiber collimator and bandpass filter assembly, which includes: a Four-fiber pigtail, with four optical fibers, the end faces of which are polished at an angle of 8 degrees and coated with corresponding anti-reflection coating layers; optical fibers 1, 2, 3, and 4 are Input 1, 2, 3, and 4 ends, all of which are input ends.

[0059] The four-fiber collimator and bandpass filter assembly also includes: a plano-convex lens Clens, with a curvature radius of R1.2 and a center length of 2.74mm; one side is polished to 8 degrees and coated with a corresponding anti-reflection film layer, and the other side is also coated with a corresponding anti-reflection film layer, with a front focal intercept of 1.61mm and a front focal focus at a distance of 1.61mm from the center of the curved surface.

[0060] The four-fiber collimator and bandpass filter assembly also includes a reinforced holder and a bandpass filter, and the effective space length inside is 1.61mm. Figure 4 .

[0061] The four-fiber collimator and bandpass filter assembly also includes an outer diameter × 5mm long glass tube. As shown in Figure 2.

[0062] The other end is a four-fiber collimator, which includes: a Four optical pigtails are threaded with four optical fibers, whose end faces are polished at an angle of 8 degrees and coated with corresponding anti-reflection coating layers; optical fibers 1', 2', 3', 4' are Onput1', 2', 3', 4' ends, all of which are output ends. The input ends Input1, 2, 3, 4 and the output ends Output1', 2', 3', 4' correspond one to one, for example, the optical signal can be coupled from the input end Input1 to the output end Output1', etc. The input ends Input1, 2, 3, 4 and the output ends Output1', 2', 3', 4' are symmetrical about the plano-convex lens Clens and the common front focus origin of the plano-convex lens Clens.

[0063] The four-fiber collimator also includes a plano-convex lens Clens, with a curvature radius of R1.2 and a center length of 2.46 mm. One side is polished 8 degrees and coated with a corresponding anti-reflection film, and the other side is also coated with a corresponding anti-reflection film. Its front focal intercept is 1.61 mm, and its front focal point is 1.61 mm away from the center of the curved surface.

[0064] The four-fiber collimator also includes an outer diameter ×6mm long glass tube, as shown in Figure 3.

[0065] The 4×4 multi-channel integrated bandpass filter device also requires an outer diameter ×16mm long glass tube, after the transmission light power is coupled, a double-stage isolator core, a four-fiber collimator plus a bandpass filter end and a four-fiber collimator end are fixed on the diameter by UV glue. × On a 16mm long glass tube.

[0066] This utility model is a reinforced multi-channel integrated mini bandpass filter isolator device that can be applied to 4×4or 7×71528~1547 / 1549~1565nm anti-C-BAND BLUE bandpass filter. The optical indicators are as follows. The optical fiber is single-mode optical fiber. Ultra Fiber Optic.

[0067] The utility model designs a reinforced multi-channel integrated mini bandpass filter isolator device, uses a plano-convex lens Clens to achieve optical path symmetry at both ends of the device, so that the transmission insertion loss is small; uses multi-light capillaries, proposes two structural designs, realizes 4×4 and 7×7 multi-port bandpass filter solutions, and meets the needs of multi-port products; uses a metal reinforced holder to enhance reliability; uses a mini glass tube structure package, and has a mini structure; adds a double-stage isolator core to reduce the impact of return light on the system.

[0068] The specific implementation scheme of this embodiment can refer to the relevant description in the above embodiment, which will not be repeated here.

[0069] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0070] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The device of realizing the reinforced multi-channel integrated mini bandpass filter isolator of the utility model is adopted. Through the symmetric characteristics of the multi-light capillary and the characteristics of the longer front focal intercept of the plano-convex lens, 4×4 and 7×7 multi-channel integrated bandpass filter devices are designed, and metal sleeves are designed to reinforce the overall structure of the device, so that the device has excellent optical properties such as very small insertion loss and high isolation and high reliability. And by compressing the inner and outer diameters of the glass tube, the device is miniaturized. It has high coaxiality, strong linearity, mini size, and precise packaging, which can be widely used in the field of optical fiber communication.

[0073] 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 description and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A device for realizing a reinforced multi-channel integrated mini bandpass filter isolator, characterized in that: One end of the device is a multi-fiber collimator, and the other end is a multi-fiber collimator and bandpass filter assembly, the multi-fiber collimator and bandpass filter assembly includes a multi-light pigtail, a first plano-convex lens, a reinforcement support, a bandpass filter and a first glass tube, one end of the multi-light pigtail of the multi-fiber collimator and bandpass filter assembly is connected to the first plano-convex lens, the multi-light pigtail of the multi-fiber collimator and bandpass filter assembly is penetrated by multiple optical fibers and all are input ends, one side of the first plano-convex lens is polished at 8 degrees and coated with a corresponding anti-reflection film layer, and the other side is a curved surface and coated with a corresponding anti-reflection film layer, the reinforcement support is fixed outside the curved surface of the first plano-convex lens, the bandpass filter is installed on the reinforcement support, and the first glass tube is installed outside the first plano-convex lens; The multi-fiber collimator comprises a multi-optical pigtail, a second plano-convex lens and a second glass tube. One end of the multi-optical pigtail of the multi-fiber collimator is connected to the second plano-convex lens. The multi-optical pigtail of the multi-fiber collimator is penetrated by multiple optical fibers and all are output ends. The input end of the multi-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds to the output end of the multi-optical pigtail of the multi-fiber collimator one by one. One side of the second plano-convex lens has an 8-degree polishing and is coated with a corresponding anti-reflection film layer, and the other side is a curved surface and is coated with a corresponding anti-reflection film layer. The second glass tube is installed outside the second plano-convex lens.

2. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 1, characterized in that: The multi-optical pigtail is a seven-optical pigtail, forming a 7×7 reinforced multi-channel integrated mini bandpass filter isolator device. The seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly has seven optical fibers and are all input ends. The seven-optical pigtail of the multi-fiber collimator has seven optical fibers and are all output ends. The input ends of the seven-optical pigtail of the multi-fiber collimator and bandpass filter assembly correspond one to one with the output ends of the seven-optical pigtail of the multi-fiber collimator.

3. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 1, characterized in that: The multi-optical pigtail also supports a four-optical pigtail to form a 4×4 reinforced multi-channel integrated mini bandpass filter isolator device. The four-optical pigtail of the multi-fiber collimator and bandpass filter assembly has four optical fibers and all are input ends, and the four-optical pigtail of the multi-fiber collimator has four optical fibers and all are output ends. The input end of the four-optical pigtail of the multi-fiber collimator and bandpass filter assembly corresponds one to one with the output end of the four-optical pigtail of the multi-fiber collimator.

4. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 1, characterized in that: The polishing angle of the end faces of the multi-optical pigtail of the multi-optical fiber collimator and bandpass filter assembly and the multi-optical pigtail of the multi-optical fiber collimator are both 8 degrees and are coated with corresponding anti-reflection film layers.

5. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 1, characterized in that: The device also includes a double-stage isolator core and an external glass tube. The multi-fiber collimator, the multi-fiber collimator and the bandpass filter assembly and the double-stage isolator core are all fixed inside the external glass tube by ultraviolet glue, and the double-stage isolator core is located between the multi-fiber collimator and the multi-fiber collimator and the bandpass filter assembly.

6. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 2, characterized in that: The diameter of the seven-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 0.9nm, and the center length is 2.03mm. The front focal intercept of the curved surface of the first plano-convex lens is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.21mm; the radius of curvature of the second plano-convex lens is 0.9nm, and the center length is 1.78mm. One side of the second plano-convex lens is polished 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer. Its front focal intercept is 1.21mm, and the front focal point is 1.21mm away from the center of the curved surface.

7. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 3, characterized in that: The diameter of the four-light pigtail is 1.8nm; the radius of curvature of the first plano-convex lens is 1.2nm, the center length is 2.74mm, the front focal intercept of the curved surface of the first plano-convex lens is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface; the length of the bandpass filter from the center of the curved surface of the first plano-convex lens is 1.61mm; the radius of curvature of the second plano-convex lens is 1.2nm, the center length is 2.46mm, one side of the second plano-convex lens is polished 8 degrees and coated with a corresponding anti-reflection film layer, and one side of the curved surface is also coated with a corresponding anti-reflection film layer, its front focal intercept is 1.61mm, and the front focal point is 1.61mm away from the center of the curved surface.

8. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 3, characterized in that: The outer diameter of the first glass tube is 2.2 mm and the length is 5 mm.

9. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 3, characterized in that: The outer diameter of the second glass tube is 2.2 mm and the length is 6 mm.

10. The device for realizing a reinforced multi-channel integrated mini bandpass filter isolator according to claim 5, characterized in that: The outer diameter of the outer glass tube is 2.9 mm and the length is 16 mm.

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