CN214669712U - Wavelength division multiplexing device - Google Patents

Abstract

The utility model discloses a wavelength division multiplexing device, including reflection assembly and single fiber collimator, wherein, reflection assembly includes two fiber pigtails, first lens and filter, two fiber pigtails' medial surface with the one end of first lens bonds fixedly, the other end of first lens with the filter bonds fixedly, single fiber collimator install in the filter is kept away from one side of first lens. The wavelength division multiplexing device fixes the double-fiber pigtail, the lens and the filter in sequence by using a bonding mode, replaces the mode of fixing by using a glass tube in the traditional structure, can save material cost, reduce space volume and reduce the film coating times, thereby reducing the technical difficulty. The technical problems that in the prior art, the wavelength division multiplexing device is fixed by a glass tube, so that the material cost is high and the size is large are solved.

Description

Wavelength division multiplexing device

Technical Field

The utility model relates to an optical communication technical field especially relates to a wavelength division multiplexing device.

Background

With the bottleneck of photoelectric conversion rate, the transmission data capacity is enlarged by time division multiplexing, and in order to enlarge the data capacity transmitted by one optical fiber, Wavelength Division Multiplexing (WDM) is needed, and multiple signals are transmitted on one optical fiber, and each signal is transmitted by light with a specific wavelength, that is, one wavelength channel. WDM combines a series of optical signals carrying information but with different wavelengths into a beam and transmits the beam along a single optical fiber; and separating the optical signals with different wavelengths by a certain method at the receiving end. WDM is generally applied to wavelength multiplexers and demultiplexers (also called wavelength multiplexer/demultiplexer), and is respectively disposed at two ends of an optical fiber to implement coupling and separation of different optical waves.

However, in the conventional structure, the two ends of the optical fiber in the wavelength division multiplexing device need to be fixed by using glass tubes, which results in higher material cost and larger space of the wavelength division multiplexing device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wavelength division multiplexing device to at least part is solved among the prior art wavelength division multiplexing device and is adopted the glass pipe fixed and the material cost that leads to is higher, the great technical problem of volume.

The purpose is realized by the following technical scheme:

the utility model provides a wavelength division multiplexing device, include:

the reflecting assembly comprises a double-fiber tail fiber, a first lens and a filter plate, wherein the end face of the inner side of the double-fiber tail fiber is fixedly bonded with one end of the first lens, and the other end of the first lens is fixedly bonded with the filter plate;

and the single optical fiber collimator is arranged on one side of the filter plate, which is far away from the first lens.

Further, the single fiber collimator includes:

single fiber pigtail;

one side of the second lens is bonded to the inner side of the single fiber pigtail, and the other side of the second lens is bonded to one side, far away from the first lens, of the filter plate.

Furthermore, the bonding surface of the double-fiber pigtail and the first lens, the bonding surface of the first lens and the filter, the bonding surface of the second lens and the single-fiber pigtail, and the bonding surface of the second lens and the filter are all formed by UV glue.

Further, each bonding surface is filled with the UV glue.

Furthermore, the filter is a thin film filter.

Furthermore, the thin film filter is a CWDM, DWDM, FWDM, BWDM or Tap light splitting film.

Further, the first lens and/or the second lens is a self-focusing lens.

The utility model provides a wavelength division multiplexing device includes reflection components and single fiber collimator, and wherein, reflection components includes two fiber pigtails, first lens and filter plate, two fiber pigtail's medial surface with the one end of first lens bonds fixedly, the other end of first lens with the filter plate bonds fixedly, single fiber collimator install in the filter plate is kept away from one side of first lens. The wavelength division multiplexing device fixes the double-fiber pigtail, the lens and the filter in sequence by using a bonding mode, replaces the mode of fixing by using a glass tube in the traditional structure, can save material cost, reduce space volume and reduce the film coating times, thereby reducing the technical difficulty. The technical problems that in the prior art, the wavelength division multiplexing device is fixed by a glass tube, so that the material cost is high and the size is large are solved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows a schematic structural view of a wavelength division multiplexing device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a reflection assembly in the wavelength division multiplexing device shown in fig. 1;

fig. 3 is a sectional view taken along a-a in fig. 1.

The reference numbers are as follows:

1-double fiber pigtail; 2-a first lens; 3-a filter plate; 4-single fiber pigtail;

5-a second lens; 6-adhesive surface.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In order to overcome among the prior art wavelength division multiplexing device and adopt the material cost that the glass pipe installation leads to high, the great problem of device volume, the utility model provides a wavelength division multiplexing device adopts the fixed connection of the mode realization each part that bonds to realized material saving cost, reduced the purpose of device volume.

In a specific embodiment, the utility model provides a wavelength division multiplexing device, as shown in fig. 1 and fig. 2, use three-port wavelength division multiplexing device as an example, this wavelength division multiplexing device includes reflection components and single fiber collimator, and wherein, reflection components includes two fiber pigtail 1, first lens 2 and filter plate 3, two fiber pigtail 1's medial surface with the one end bonding of first lens 2 is fixed, the other end of first lens 2 with filter plate 3 bonds fixedly, single fiber collimator install in filter plate 3 keeps away from one side of first lens 2. The inner end face of the double-fiber pigtail 1 is the end face close to one side of the single-fiber collimator.

One of the optical fibers of the dual optical fiber pigtail 1 forms a common port, the other optical fiber forms a reflection port, light enters from the common port, and the reflection port receives the light for optical coupling. The double-fiber pigtail 1 is not limited to the common pitch, the large pitch (from 125 to 180um pitch) type, and the like.

Specifically, the single fiber collimator includes a single fiber pigtail 4 forming a transmission port, and a second lens 5, wherein one side of the second lens 5 is bonded to the inner side of the single fiber pigtail 4, and the other side of the second lens 5 is bonded to one side of the filter 3 away from the first lens 2. Therefore, the single fiber pigtail 4 and the second lens 5 and the filter 3 are connected in a bonding and fixing mode, and the material cost and the device volume are further reduced.

The bonding surface 6 of the double-fiber pigtail 1 and the first lens 2, the bonding surface 6 of the first lens 2 and the filter 3, the bonding surface 6 of the second lens 5 and the single-fiber pigtail 4, and the bonding surface 6 of the second lens 5 and the filter 3 are all formed by UV glue. That is, UV curing is used mainly everywhere where the bonding is needed, so that the refractive index of the glue can be better matched to the refractive index of the optical material being bonded.

In order to ensure the bonding effect and the light transmission effect, as shown in fig. 3, each bonding surface 6 is filled with the UV glue. The glue fills the contact surfaces between two parts which are bonded to each other completely, so that the light beam is inevitably transmitted through the glue. Theoretically, the UV glue can also be applied to the contact surface in a spot-coating manner.

Specifically, the filter 3 is a thin film filter 3, and the thin film filter 3 is a CWDM, DWDM, FWDM, BWDM, or Tap spectroscopic film.

Further, the first Lens 2 and/or the second Lens 5 are self-focusing lenses, i.e., G lenses (GRIN Lens).

The wavelength division multiplexing device provided in the foregoing embodiment is mounted in a manner that, as shown in fig. 1, a reflection component (a component formed by a dual optical fiber pigtail 1, a first lens 2, and a filter 3) is assembled, that is, the filter 3 is attached to a flat end surface of the first lens 2 by glue, an oblique end surface of the dual optical fiber pigtail 1 is aligned in parallel with an oblique end surface of the first lens 2, one of two optical fibers of the dual optical fiber pigtail 1 is defined as a common port, and the other optical fiber is a reflection port. And light enters from the public port, the reflection port receives the light for optical coupling, and when reflection loss meets the requirement, reflection assembly is completed. And finally, directly pointing UV glue between the inclined end face of the double-optical-fiber tail fiber 1 and the inclined end face of the first lens 2, readjusting to enable the reflection loss to meet the requirement, and irradiating curing glue by using UV light to complete the manufacturing and adjustment of the reflection assembly.

And then assembling the second lens, the single-fiber pigtail 4 and the reflection assembly, taking a common port of the reflection assembly as an incoming light, taking the single-fiber pigtail 4 as a light-emitting port for transmission optical coupling, after the transmission insertion loss meets the requirement, applying UV glue on the interface points between the filter 3 and the second lens and between the second lens and the single-fiber pigtail 4, then performing optical coupling again, and irradiating curing glue by using UV light after the transmission insertion loss meets the requirement.

In the foregoing detailed embodiment, the utility model provides a wavelength division multiplexing device includes reflection components and single fiber collimator, and wherein, reflection components includes two fiber pigtails, first lens and filter, the medial surface of two fiber pigtails with the one end of first lens is bonded fixedly, the other end of first lens with the filter bonds fixedly, single fiber collimator install in the filter is kept away from one side of first lens. The wavelength division multiplexing device fixes the double-fiber pigtail, the lens and the filter in sequence by using a bonding mode, replaces the mode of fixing by using a glass tube in the traditional structure, can save material cost, reduce space volume and reduce the film coating times, thereby reducing the technical difficulty. The technical problems that in the prior art, the wavelength division multiplexing device is fixed by a glass tube, so that the material cost is high and the size is large are solved.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. A wavelength division multiplexing device, comprising:

the reflecting assembly comprises a double-fiber tail fiber (1), a first lens (2) and a filter plate (3), wherein the end face of the inner side of the double-fiber tail fiber (1) is fixedly bonded with one end of the first lens (2), and the other end of the first lens (2) is fixedly bonded with the filter plate (3);

and the single optical fiber collimator is arranged on one side of the filter plate (3) far away from the first lens (2).

2. The wavelength division multiplexing device of claim 1, wherein the single fiber collimator comprises:

a single fiber pigtail (4);

and one side of the second lens (5) is bonded to the inner side of the single-fiber tail fiber (4), and the other side of the second lens (5) is bonded to one side, away from the first lens (2), of the filter plate (3).

3. Wavelength division multiplexing device according to claim 2, wherein the bonding surface (6) of the dual fiber pigtail (1) to the first lens (2), the bonding surface (6) of the first lens (2) to the filter (3), the bonding surface (6) of the second lens (5) to the single fiber pigtail (4), and the bonding surface (6) of the second lens (5) to the filter (3) are formed by UV glue.

4. A wavelength division multiplexing device according to claim 3, characterized in that each of the bonding surfaces (6) is filled with the UV glue.

5. A wavelength division multiplexing device according to claim 1, characterized in that the filter (3) is a thin film filter (3).

6. A WDM-device according to claim 5, wherein the thin-film filter (3) is a CWDM, DWDM, FWDM, BWDM or Tap beam-splitting membrane.

7. The wdm device of claim 2, wherein the first lens (2) and/or the second lens (5) is a self-focusing lens.

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