CN215813440U - Integrated four-fiber multi-wavelength device - Google Patents

Abstract

The utility model discloses an integrated four-fiber multi-wavelength device, which comprises three fiber optical heads, a first lens, a first wavelength division multiplexing membrane, a second lens and a single fiber optical head, wherein the three fiber optical heads, the first lens, the second wavelength division multiplexing membrane, the second lens and the single fiber optical head are sequentially arranged from left to right; the first and second wavelength division multiplexing diaphragms are sequentially overlapped, pasted and fixed on the first lens, the first lens and the second lens are coaxially fixed in the first sleeve, and the lens and the optical fiber head are fixedly connected through glue. The multi-wavelength division multiplexing and demultiplexing function is realized by adopting a structure that three fiber optical fiber heads and a single optical fiber head are overlapped and adhered to a single lens by two wavelength division multiplexing diaphragms. Therefore, the integrated four-fiber multi-wavelength device provided by the utility model has the advantages of simple process, compact structure, small volume, small insertion loss, low cost and the like, is suitable for limited base station space, and is convenient for application of optical devices in a 5G network machine room and a base station.

Description

Integrated four-fiber multi-wavelength device

Technical Field

The utility model relates to the technical field of optical fiber communication, in particular to an integrated four-fiber multi-wavelength device in the technical field of optical fiber communication.

Background

As the development of optical fiber communication is rapid, the maximum use of the width of the optical fiber is directly required with the increase of the demand of transmission capacity. The Wavelength Division Multiplexing (WDM) technology is one of the most effective schemes for increasing the optical fiber communication capacity, in which optical modulation signals of different optical wavelengths are multiplexed into one optical fiber according to the optical Wavelength and transmitted, and multi-Wavelength optical modulation signals simultaneously transmitted in the same optical fiber can be decomposed into individual wavelengths and output respectively. With the increasing popularity of optical fiber networks, especially the rapid implementation of current 5G networks, and the point-to-point data transmission, especially the massive deployment of 5G transit and forward nodes. Therefore, the optical fiber is widely applied to the current optical communication network.

A conventional splitting and combining device with a common collimator tuning structure is shown in fig. 1, and includes a dual optical fiber head 11, a first lens 21, a wavelength division multiplexing membrane 31, a sleeve 45, a single optical fiber head 12, a second lens 22, a sleeve 46, and a sleeve 47. During assembly, the wavelength division multiplexing film 31 and the first lens 21 are firstly bonded and fixed, the bonding positions are e1 and e2 shown in fig. 1, the dual-fiber head 11 is fixed in the sleeve 45, then the dual-fiber head 11 is adjusted, and when the optical performance is optimal, the dual-fiber head is bonded and fixed with the first lens 21, the bonding positions are f1 and f2 shown in fig. 1, and thus the dual-fiber collimator is completed; the single fiber head 12 and the second lens 22 are placed in the sleeve 46 to form a single fiber collimator by a conventional exchange or spot method. Then the double-fiber collimator and the single-fiber collimator are placed in the sleeve 47 to be adjusted, the two collimators are exchanged and coupled to adjust the index of the device to be optimal, and then the device is fixed in the sleeve 47, wherein the bonding positions are g1, g2, g3 and g4 shown in fig. 1. Therefore, the device with the structure has the advantages of complex adjusting process, increased adjusting difficulty and long working hours. For realizing the function of combining and combining multiple wavelengths and multiple output ports, the device of fig. 1 needs to be implemented by cascading, as shown in fig. 2, only two cascades of the device of fig. 1 are shown in fig. 2. Because the radius of curvature of the optical fiber is not less than 40mm when the optical fiber is used as a disk box, the size of the four-fiber multi-wavelength module in the disk box of the two devices shown in fig. 1 is at least 45 × 45mm, the volume is too large, the cost is higher, and the requirement of the existing limited base station space can not be met.

At present, a four-fiber multi-wavelength device with a Zblock structure is provided, if the optical fiber head is 1.0mm, the outer diameter of a collimator is 1.4mm, and the channel interval is at least 1.8-2.0 mm by adding a proper debugging space. As shown in fig. 3, the device is roughly 9 × 20mm in size and has a large volume.

The utility model provides an integrated four-fiber multi-wavelength device, which is characterized in that firstly, an optical fiber head and a lens do not need to be made into a collimator, exchange is not needed, only displacement coupling monotony is needed to be respectively carried out on a three-fiber optical fiber head and a single optical fiber head, two wavelength division multiplexing membranes are added, the assembly and adjustment of the integrated four-fiber multi-wavelength device are realized, and the debugging method is simple. Therefore, the integrated four-fiber multi-wavelength device has the advantages of simple process, compact structure, small volume and the like.

Therefore, 5G devices are added under the condition that the existing 4G base station is basically filled, and the existing common tuning collimator structure, the cascade scheme structure and the Zblock structure of the multi-wavelength device for splitting and combining waves are difficult to meet the requirements. There is a need for a multi-wavelength device with smaller volume and flexible configuration.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides an integrated four-fiber multi-wavelength device which is simple in process, compact in structure, small in size, small in insertion loss and low in cost, is suitable for a limited base station space and is convenient for application of optical devices in a 5G network machine room and a base station.

The utility model is realized by the following modes:

an integrated four-fiber multi-wavelength device comprises three fiber optical heads, a first lens, a first wavelength division multiplexing membrane, a second wavelength division multiplexing membrane, a first sleeve, a second lens and a single optical head, wherein the three fiber optical heads, the first lens, the second wavelength division multiplexing membrane, the first sleeve, the second lens and the single optical head are sequentially arranged from left to right; the first and second wavelength division multiplexing diaphragms are sequentially overlapped, pasted and fixed on the first lens, the first lens and the second lens are coaxially fixed in the first sleeve, and the lenses and the optical fiber head are fixedly connected through glue.

One optical fiber in the three-fiber optical fiber head is used for inputting light beams with multiple wavelengths, and the light beams with the multiple wavelengths are output from other optical fibers and the single optical fiber of the three-fiber optical fiber head after being reflected and transmitted by the first and second wavelength division multiplexing diaphragms after passing through the first lens.

Furthermore, the first wavelength division multiplexing membrane and the second wavelength division multiplexing membrane are sequentially overlapped and pasted and fixed on the first lens, or the first lens is firstly sleeved with the second sleeve, and then the first wavelength division multiplexing membrane and the second wavelength division multiplexing membrane are pasted on the surface of the second sleeve; the first lens and the second lens are coaxially fixed in the first sleeve; the lens and the optical fiber head are connected and fixed through glue.

Further, the lens is a self-focusing lens or a ball lens.

Furthermore, one surface of the wavelength division multiplexing membrane is plated with a wavelength division multiplexing film, the surface of the wavelength division multiplexing film faces the three-fiber optical fiber head, and the other surface of the wavelength division multiplexing membrane is plated with an antireflection film.

Furthermore, when a first optical fiber in the three-fiber optical fiber head is used as an optical input port and the other optical fibers are used as output ports, the component is used for light splitting; when the first optical fiber is used as an optical output port and the other optical fibers are used as input ports, the component is used for light combination.

Has the advantages that:

compared with the prior art, the utility model has the following advantages:

the structure that three fiber optical fiber heads and a single optical fiber head are adopted, and two wavelength division multiplexing diaphragms are superposed and adhered to a single lens is adopted to realize the function of four-fiber multi-wavelength division multiplexing demultiplexing; the method has the advantages of simple process, compact structure, small volume, small insertion loss, low cost and the like, is suitable for limited base station space, and is convenient for application of optical devices in a 5G network machine room and a base station. For example, as shown in fig. 2 and 3, taking a four-fiber multi-wavelength device in the prior art as an example, the device is roughly 45 × 45mm, 11 × 20mm in size, and has a large volume. The integrated four-fiber multi-wavelength device provided by the utility model can be made into an ultra-small size of OD 2.78L 15 mm.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a structure of a combiner/combiner device of a collimator debugging structure in the prior art;

FIG. 2 is a schematic diagram of a prior art multi-wavelength device structure of a device cascade;

FIG. 3 is a schematic diagram of a prior art four-fiber multi-wavelength device with a Zblock structure;

FIG. 4 is a schematic diagram of a first embodiment of the present invention;

FIG. 5 is a schematic view of a second embodiment of the present invention;

in the figure: 11-three-fiber optical fiber head, 111-first optical fiber, 112-second optical fiber, 113-third optical fiber, 12-single optical fiber head, 121-single optical fiber head, 21-first lens, 22-second lens, 31-first wavelength division multiplexing membrane, 32-second wavelength division multiplexing membrane, 41-first sleeve and 42-second sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 4, the present invention discloses an integrated four-fiber multi-wavelength device, which comprises a three-fiber optical fiber head 11, a first lens 21, a first and a second wavelength division multiplexing diaphragms 31, 32, a first sleeve 41, a second lens 22, and a single optical fiber head 12, which are sequentially arranged from left to right; the first and second wavelength division multiplexing membranes 31 and 32 are sequentially overlapped, adhered and fixed on the first lens 21, the first lens 21 and the second lens 22 are coaxially fixed in the first sleeve 41, and the lenses and the optical fiber head are fixedly connected through glue.

The three-fiber optical head 11 includes a first optical fiber 111, a second optical fiber 112, and a third optical fiber 113. The first optical fiber 111 of the three-fiber optical head 11 is used for inputting light beams with a plurality of wavelengths, and the light beams with the plurality of wavelengths are reflected and transmitted by the first wavelength division multiplexing diaphragm 31 and the second wavelength division multiplexing diaphragm 32 after passing through the first lens 21, and then are output from the second and third optical fibers 112 and 113 of the three-fiber optical head 11 and the optical fiber 121 of the single-fiber optical head. The first wavelength division multiplexing film 31 and the second wavelength division multiplexing film 32 selectively reflect a desired wavelength and transmit light of other wavelengths, respectively.

The integrated four-fiber multi-wavelength device of the first embodiment is shown in fig. 4: the first lens 21 is a self-focusing lens, and the second lens 22 is a ball lens. The system beam (COM) is input from the first fiber 111 of the three-fiber optical head 11, enters through the first lens 21 to the first wavelength division multiplexing diaphragm 31, and is reflected and transmitted by the first wavelength division multiplexing diaphragm 31 to be split into two beams, i.e., a reflected beam and a transmitted beam. The reflected beam (Out1) is output by the third optical fiber 113. The transmitted light beam (Out2& Out3) reaches the second wavelength division multiplexing film 32, the light beam (Out2) having a wavelength corresponding to the reflected wavelength of the second wavelength division multiplexing film 32 is output from the second optical fiber 112, and the remaining wavelength light beam (Out3) is transmitted through the second lens 22 and then output from the single-fiber-head optical fiber 121 of the single fiber head 12.

Debugging and assembling: the first wavelength division multiplexing film 31 is fixed to the first lens 21 by bonding. And adjusting the three-fiber optical fiber head 11, and when the optical index of the reflected light beam (Out1) reaches the index requirement, adhering and fixing the three-fiber optical fiber head 11 and the first lens 21 through glue, wherein the reflected light beam (Out1) is received and output by the third optical fiber 113, and the adhering positions are positions a1 and a2 shown in fig. 4. Then, the second wavelength division multiplexing film 32 is adjusted, the second wavelength division multiplexing film 32 transmits the light beam of the specific wavelength and reflects the light beams of the other wavelengths except the specific wavelength, and the reflected light beam (Out2) is received and output by the second optical fiber 112 after passing through the first lens 21. The second lens 22 and the first lens 21 are coaxially fixed in the first ferrule 41, and the specific wavelength light beam (Out3) transmitted through the first and second wavelength division multiplexing diaphragms 31, 32 is received and output by the optical fiber 121 after passing through the second lens 22. And adjusting the single optical fiber head 12, and when the optical index of the transmitted specific wavelength light beam (Out3) reaches the index requirement, adhering and fixing the single optical fiber head 12 and the second lens 22 by glue, wherein the adhering positions are positions b1 and b2 shown in fig. 2.

The integrated four-fiber multi-wavelength device can achieve the ultra-small size of OD 2.78L 15mm, and compared with the device in the prior art, the volume of the device is greatly reduced.

Example two:

as shown in fig. 5, the present invention discloses an integrated four-fiber multi-wavelength device, which comprises a three-fiber optical fiber head 11, a first lens 21, a first and a second wavelength division multiplexing diaphragms 31, 32, a first sleeve 41, a second sleeve 42, a second lens 22, and a single optical fiber head 12, which are sequentially arranged from left to right; the first and second wavelength division multiplexing membranes 31 and 32 are sequentially overlapped, adhered and fixed on the first lens 21, the first lens 21 and the second lens 22 are coaxially fixed in the first sleeve 41, and the lenses and the optical fiber head are fixedly connected through glue.

The three-fiber optical head 11 includes a first optical fiber 111, a second optical fiber 112, and a third optical fiber 113. The first optical fiber 111 in the three-fiber optical head 11 is used for inputting light beams with a plurality of wavelengths, and the light beams with the plurality of wavelengths are output from the second and third optical fibers 112 and 113 of the three-fiber optical head 11 and the optical fiber 121 of the single optical head after being reflected and transmitted by the first 31 and the second wavelength division multiplexing film 32 after passing through the first lens 21. The first wavelength division multiplexing film 31 and the second wavelength division multiplexing film 32 selectively reflect a desired wavelength and transmit light of other wavelengths, respectively.

The integrated four-fiber multi-wavelength device of the second embodiment is shown in fig. 5: the first lens 21 is a ball lens, and the second lens 22 is a ball lens. Since the first lens 21 is a ball lens, the first wavelength division multiplexing film 31 cannot be directly adhered to the first lens 21, and the second sleeve 42 is firstly sleeved on the first lens 21, and then the first wavelength division multiplexing film 31 is adhered to the surface of the second sleeve 42. The system beam (COM) is input from the first fiber 111 of the three-fiber optical head 11, enters through the first lens 21 to the first wavelength division multiplexing diaphragm 31, and is reflected and transmitted by the first wavelength division multiplexing diaphragm 31 to be split into two beams, i.e., a reflected beam and a transmitted beam. The reflected beam (Out1) is output by the third optical fiber 113. The transmitted light beam (Out2& Out3) reaches the second wavelength division multiplexing diaphragm 32, the light beam (Out2) having a wavelength corresponding to the reflected wavelength of the second wavelength division multiplexing diaphragm 32 is output from the second optical fiber 112, and the remaining wavelength light beam (Out3) is transmitted through the second lens 22 and then output from the optical fiber 121 of the single fiber head 12. The debugging process and principle are the same as those of the first embodiment.

In the first and second embodiments, the first wavelength division multiplexing film 31 and the second wavelength division multiplexing film 32 are coated with the corresponding wavelength division multiplexing film systems according to the wavelength division multiplexing specifically required for the three output ports Out1, Out2, and Out3 of the device.

In the first and second embodiments, the second lens 22 may be a ball lens or a self-focusing lens.

In the first and second embodiments, the number of device channels can be increased by a structure in which a plurality of devices are cascaded according to the use requirements of customers.

In the first and second embodiments, due to the principle that the optical path is reversible, the device can also realize the function of combining multiple wavelengths of light beams, and can also be used for inputting and outputting light in any other number of proportions.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. An integrated four-fiber multi-wavelength device, comprising: the optical fiber coupler comprises three optical fiber heads, a first lens, a first wavelength division multiplexing membrane, a second lens and a single optical fiber head which are sequentially arranged from left to right; the first wavelength division multiplexing diaphragm and the second wavelength division multiplexing diaphragm are sequentially overlapped and arranged at the end part of the first lens; the first lens and the second lens are coaxially fixed in the first sleeve.

2. An integrated four-fiber multi-wavelength device according to claim 1, wherein: the first wavelength division multiplexing diaphragm and the second wavelength division multiplexing diaphragm are sequentially overlapped, pasted and fixed on the first lens.

3. An integrated four-fiber multi-wavelength device according to claim 1, wherein: a second sleeve is sleeved at the end part of the first lens; and the second sleeve pipe surface is sequentially overlapped and stuck with and fixed with a first wavelength division multiplexing membrane and a second wavelength division multiplexing membrane.

4. An integrated four-fiber multi-wavelength device according to claim 1, wherein: the first lens and the second lens are self-focusing lenses or ball lenses.

5. An integrated four-fiber multi-wavelength device according to claim 1, wherein: one surface of the first wavelength division multiplexing membrane and one surface of the second wavelength division multiplexing membrane are plated with wavelength division multiplexing films, the surfaces of the wavelength division multiplexing films face the three-fiber optical fiber heads, and the other surfaces of the wavelength division multiplexing films are plated with anti-reflection films.

6. An integrated four-fiber multi-wavelength device according to claim 1, wherein: when the first optical fiber in the three-fiber optical fiber head is used as an optical input port and the other optical fibers are used as output ports, the device is used for light splitting; when the first optical fiber is used as an optical output port and the other optical fibers are used as input ports, the device is used for light combination.

7. An integrated four-fiber multi-wavelength device according to claim 1, wherein: the three-fiber optical fiber head is fixedly connected with the first lens through glue.

8. An integrated four-fiber multi-wavelength device according to claim 1, wherein: and the second lens is fixedly connected with the single optical fiber head through glue.

Images