CN216979360U

CN216979360U - Integrated encapsulated wavelength division multiplexer

Info

Publication number: CN216979360U
Application number: CN202220272150.8U
Authority: CN
Inventors: 周孟欣; 宋立; 徐祖应; 刘峰
Original assignee: Changfei Wuhan Photosystem Co ltd
Current assignee: Changfei Wuhan Photosystem Co ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-07-15
Anticipated expiration: 2032-02-10

Abstract

The utility model relates to the technical field of wavelength division multiplexers, in particular to an integrally packaged wavelength division multiplexer which comprises a first glass tube, wherein one end of the first glass tube is provided with four tail optical fibers, the other end of the first glass tube is provided with a single-fiber collimator, and two optical fibers at intervals in the four tail optical fibers respectively transmit signals to the single-fiber collimator through a micro lens and a thin film filter. The utility model is realized by two self-focusing lenses, two micro lenses, two thin film filters, a four-tail optical fiber and a single-fiber collimator. Through the use of the four-tail optical fiber, light is only required to be respectively input into two optical fibers at intervals in the four-tail optical fiber, multiple light reflection is not required, the two thin film filters respectively transmit signals to the single-fiber collimator in real time, and two-path light wave multiplexing is realized.

Description

Integrated encapsulated wavelength division multiplexer

Technical Field

The utility model relates to the technical field of wavelength division multiplexers, in particular to an integrated packaging wavelength division multiplexer.

Background

In a communication network, in order to widen information flux, multiple optical signals need to be transmitted, and in order to save optical fiber resources, a wavelength division multiplexer combines the multiple optical signals into one optical fiber for transmission, and then decomposes signals in the one optical fiber into multiple optical signals. If the wavelength division multiplexing of two optical wave signals with different wavelengths is considered, the wavelength division multiplexers with the two different wavelengths need to be cascaded, and the occupied size is large. As a passive device in an optical communication system, in order to meet the requirement for higher transmission frequency in the construction of a 5G network, a wavelength division multiplexer is needed to realize the transmission of multiple paths of optical wave optical signals, the density of a base station needs to be increased, and the wavelength division multiplexer also needs to be used between the base station and an access network. Because the density of the base station is high, the structural aesthetic property of the base station is often considered, the introduced devices and the module system need to be more compact, and the size of the devices is also more required. To this end, we propose an integrated package wavelength division multiplexer.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an integrated wavelength division multiplexer, so as to solve the technical problems in the related art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an integrated encapsulated wavelength division multiplexer, includes first glass pipe, four pigtail fibers are installed to the one end of first glass pipe, and the single fiber collimator is installed to the other end, two optic fibre at four pigtail fiber intermediate spacings pass through micro lens and film filter respectively with signal transmission to single fiber collimator.

Preferably, the optical fiber connector further comprises a first self-focusing lens and a second self-focusing lens, wherein the first self-focusing lens and the second self-focusing lens are respectively connected to the two optical fiber end faces on the upper side and the two optical fiber end faces on the lower side of the four-tail optical fiber through glue.

Preferably, the thin film filter comprises a first thin film filter and a second thin film filter, and the first thin film filter and the second thin film filter are respectively installed on the other end faces of the first self-focusing lens and the second self-focusing lens through glue water.

Preferably, the micro lens comprises a first lens and a second lens, the first self-focusing lens is fixed at one end of the second glass tube, and the first lens is fixed at the other end of the second glass tube; the second self-focusing lens is fixed at one end of the third glass tube, and the second lens is fixed at the other end of the third glass tube.

Preferably, the single-fiber collimator is formed by bonding Clens and single tail fibers through glue, and fixing the Clens and the single tail fibers in a glass tube sleeve through the glue.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model is realized by two self-focusing lenses, two micro lenses, two thin film filters, a four-tail optical fiber and a single-fiber collimator. Through the use of the four-tail optical fiber, light is only required to be respectively input into two optical fibers at intervals in the four-tail optical fiber, multiple light reflection is not required, the two thin film filters respectively transmit signals to the single-fiber collimator in real time, and two-path light wave multiplexing is realized. When the light waves are demultiplexed, multi-signal light waves are input into the single-fiber collimator in real time, pass through the lens and the thin film filter and are output to two spaced fibers in the four-tail optical fiber, multi-path light splitting is achieved, and the method is simple and easy to achieve and low in cost.

2. The utility model uses one device to realize the functions of splitting, combining, collimating and the like of two paths of optical signals, the first lens and the second lens respectively converge light beams to the focal plane of the lens of the single-fiber collimator to realize the light combining of the two paths of light, similarly, the light path is reversible, and light waves with two wavelengths are input through the single-fiber collimator to realize the splitting of the two paths of light. The single-fiber collimator is saved by adjusting the light path by using the lens, the use of a plurality of double-tail fibers is reduced, the optical transmission application of four-tail fibers is realized, and compared with the traditional multi-path wavelength division multiplexer, the cascade among devices is reduced, the process is simplified, the material is saved, and the device cost is reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the wavelength division multiplexer of the present invention;

fig. 2 is a schematic diagram of optical path transmission after light is emitted from the thin film filter of the wavelength division multiplexer according to the present invention.

In the figure: 1. four pigtail fibers; 2. a first glass tube; 3. a first self-focusing lens; 4. a second self-focusing lens; 5. a first thin film filter; 6. a second thin film filter; 7. a first lens; 8. a second lens; 9. a second glass tube; 10. a third glass tube; 11. a single fiber collimator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, an integrally packaged wavelength division multiplexer includes a first glass tube 2, four pigtail fibers 1 are installed at one end of the first glass tube 2, a single fiber collimator 11 is installed at the other end of the first glass tube, and two optical fibers spaced in the four pigtail fibers 1 transmit signals to the single fiber collimator 11 through a micro lens and a thin film filter respectively. The first glass tube 2 had an inner diameter of 2.55mm and an outer diameter of 3.50 mm.

The four-tail optical fiber self-focusing device further comprises a first self-focusing lens 3 and a second self-focusing lens 4, wherein the first self-focusing lens 3 and the second self-focusing lens 4 are respectively connected to the inner side end faces of two spaced optical fibers in the four-tail optical fiber 1 through glue. The first self-focusing lens 3 and the second self-focusing lens 4 are self-focusing lenses having a diameter of 1.0 mm.

The thin film filter comprises a first thin film filter 5 and a second thin film filter 6, and the first thin film filter 5 and the second thin film filter 6 are respectively installed on the other end faces of the first self-focusing lens 3 and the second self-focusing lens 4 through glue water. The first thin film filter 5 and the second thin film filter 6 are coated filters with the size of 0.75 x 1.0mm, and the filter wave band is 1310 wave band and 1550 wave band.

The micro lens comprises a first lens 7 and a second lens 8, the lenses are cambered surface cylindrical lenses, the inclination angle is 8 degrees, and parallel light can be converged on the single-fiber collimator 11. The first self-focusing lens 3 is fixed at one end of the second glass tube 9, and the first lens 7 is fixed at the other end of the second glass tube 9; the second self-focusing lens 4 is fixed at one end of the third glass tube 10, and the second lens 8 is fixed at the other end of the third glass tube 10. The second glass tube 9 and the third glass tube 10 had an inner diameter of 1.10mm and an outer diameter of 1.20 mm.

The single fiber collimator 11 is glued with Clens and single pigtail and fixed in the glass tube sleeve with glue. A single-tail optical fiber; the Clens lens is arranged on the inner side of the single tail fiber; the single pigtail and the Clens are fixed through a glass sleeve, and the inner diameter of the glass sleeve is 1.83mm, and the outer diameter of the glass sleeve is 2.5 mm.

Compared with the prior art, the utility model is realized by two self-focusing lenses, two micro lenses, two thin film filters, a four-tail optical fiber 1 and a single-fiber collimator 11. Through the use of the four-tail optical fiber 1, light is only required to be respectively input into two optical fibers at intervals in the four-tail optical fiber 1, multiple light reflection is not required, the two thin film filters respectively transmit signals to the single-fiber collimator 11 in real time, and two-path light wave multiplexing is realized. When the light waves are demultiplexed, multi-signal light waves are input into the single-fiber collimator 11 in real time, pass through the micro lens and the thin film filter, and are output to two spaced fibers in the four-tail optical fiber 1, so that multi-path light splitting is realized, and the method is simple and easy to realize and low in cost.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An integrated encapsulated wavelength division multiplexer comprising a first glass tube (2), characterized in that: four pigtail fibers (1) are installed to the one end of first glass pipe (2), and single fiber collimator (11) are installed to the other end, two optic fibre of four pigtail fibers (1) intermediate separation pass through microlens and film filter respectively with signal transmission to single fiber collimator (11).

2. An integrally packaged wavelength division multiplexer according to claim 1, wherein: the optical fiber connector further comprises a first self-focusing lens (3) and a second self-focusing lens (4), wherein the first self-focusing lens (3) and the second self-focusing lens (4) are connected to the two optical fiber end faces on the upper side and the lower side of the four-tail optical fiber (1) through glue respectively.

3. An integrally packaged wavelength division multiplexer according to claim 2, wherein: the thin film filter comprises a first thin film filter (5) and a second thin film filter (6), wherein the first thin film filter (5) and the second thin film filter (6) are respectively installed on the other end faces of the first self-focusing lens (3) and the second self-focusing lens (4) through glue water.

4. An integrally packaged wavelength division multiplexer according to claim 3, wherein: the micro lens comprises a first lens (7) and a second lens (8), the first self-focusing lens (3) is fixed at one end of the second glass tube (9), and the first lens (7) is fixed at the other end of the second glass tube (9); the second self-focusing lens (4) is fixed at one end of the third glass tube (10), and the second lens (8) is fixed at the other end of the third glass tube (10).

5. An integrally packaged wavelength division multiplexer according to claim 1, wherein: the single-fiber collimator (11) is bonded by Clens and single tail fiber through glue, and is fixed in the glass tube sleeve through the glue.