Two-in-one wavelength division multiplexer with novel structure

Abstract

The utility model relates to a communication technology, in particular to a two-in-one wavelength division multiplexer with a novel structure, which comprises a four-fiber reflecting piece and a double-fiber collimator, and the convergence angles of the four-fiber reflecting piece and the double-fiber collimator on light beams are consistent; the four-fiber reflector and the double-fiber collimator respectively comprise a first C-type micro lens and a second C-type micro lens, and the spherical end curvatures of the first C-type micro lens and the second C-type micro lens are the same, so that the convergence angles of light beams are consistent; the four-fiber reflecting piece further comprises a filter plate, and a wave division film face of the filter plate is located on the spherical end focus of the first C-type micro lens. The C-shaped micro lenses in the reflector and the collimator are set to have the same spherical end curvature, and in addition, the wave division film surface of the filter is arranged on the spherical end focus of one of the C-shaped micro lenses, so that the whole structure achieves the effect of consistent light beam convergence angles, and the problem that the coupling efficiency of two paths of light beams cannot be optimal at the same time is solved.

Description

Technical Field

[0001] The utility model relates to a communication technology, in particular to a two-in-one wavelength division multiplexer with a new structure. Background Art

[0002] In recent years, mobile services and broadband services have continued to develop, and communication bandwidth has continued to expand, greatly facilitating people's daily lives. At the same time, this has led to the emergence of various new service businesses and service demands, from smart homes to smart cities. These demands have put forward new requirements for existing communication bandwidth, driving the continued expansion and upgrading of communication bandwidth. Major operators have also been actively researching and designing their own upgrade solutions.

[0003] In general, communication systems need to meet both uplink and downlink requirements, that is, a certain wavelength signal can achieve both downlink and uplink, so as to meet the bidirectional requirements of download and upload. To achieve this function, two wavelength division multiplexing devices with the same wavelength need to be arranged in the wavelength division multiplexing system at the same time, used for uplink and downlink respectively. Using a two-in-one device can meet the requirements of uplink and downlink at the same time, and it is smaller in size and lower in cost.

[0004] A conventional two-in-one wavelength division multiplexer includes a G-type microlens (self-focusing lens) and a C-type microlens. Due to the structural differences between the two, the convergence angles of the light beams cannot be exactly the same during propagation, and the coupling efficiency of the two light beams often cannot reach the optimal level at the same time, resulting in some signal loss. Utility Model Content

[0005] The purpose of the utility model is to provide a two-in-one wavelength division multiplexer with a new structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A two-in-one wavelength division multiplexer with a new structure includes a four-fiber reflector and a dual-fiber collimator. The convergence angles of the four-fiber reflector and the dual-fiber collimator on the light beam are consistent, so as to optimize the light beam coupling efficiency.

[0008] The four-fiber reflector and the dual-fiber collimator respectively include a first C-type microlens and a second C-type microlens, and the spherical end curvatures of the first C-type microlens and the second C-type microlens are the same to achieve consistent convergence angles of the light beams;

[0009] The four-fiber reflector also includes a filter, and the wave splitting film surface of the filter is located on the spherical end focus of the first C-type microlens.

[0010] The two-in-one wavelength division multiplexer with a new structure as described above: the four-fiber reflector also includes a four-fiber pigtail, one end of which is connected to a C-type microlens; the other end of the four-fiber pigtail forms two light input ports and two reflected light output ports.

[0011] The two-in-one wavelength division multiplexer with a new structure as described above: the four-fiber pigtail is enclosed and fixed in a first glass tube, and one end of the four-fiber pigtail adapted to the first C-type microlens protrudes from the first glass tube.

[0012] The two-in-one wavelength division multiplexer with a new structure as described above: the first C-type microlens and the filter are integrated in the second glass tube.

[0013] The two-in-one wavelength division multiplexer with a new structure as described above: the dual-fiber collimator further includes a dual-fiber pigtail, one end of the dual-fiber pigtail is butted with the end of the second C-type microlens away from the four-fiber reflector;

[0014] The other end of the dual-fiber pigtail forms two transmission light output ports.

[0015] The two-in-one wavelength division multiplexer with a new structure as described above: the second C-type microlens and the dual-fiber pigtail are integrated in the third glass tube.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting the C-shaped microlenses in the reflector and the collimator to have the same spherical end curvature, and in addition, setting the wave splitting film surface of the filter at the spherical end focus of one of the C-shaped microlenses, the overall structure achieves the effect of consistent light beam convergence angles, solving the problem that the coupling efficiency of the two light beams often cannot reach the optimal level at the same time; in addition, the overall structure has not been significantly changed, and a two-in-one device can still be formed to meet the uplink and downlink requirements, retaining the advantages of small overall structure volume and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a new two-in-one wavelength division multiplexer.

[0018] In the figure: 01- glass tube No. 1; 02- four-fiber pigtail; 03- C-type microlens No. 1; 04- glass tube No. 2; 05- filter; 06- C-type microlens No. 2; 07- two-fiber pigtail; 08- glass tube No. 3. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] See also Figure 1 As an embodiment of the utility model, the two-in-one wavelength division multiplexer of the new structure includes a four-fiber reflector and a dual-fiber collimator, and the convergence angle of the four-fiber reflector and the dual-fiber collimator to the light beam is consistent to optimize the light beam coupling efficiency;

[0022] The four-fiber reflector and the dual-fiber collimator respectively include a first C-type microlens 03 and a second C-type microlens 06, and the spherical end curvatures of the first C-type microlens 03 and the second C-type microlens 06 are the same, so as to achieve a consistent convergence angle of the light beam;

[0023] The four-fiber reflector also includes a filter 05 , and the wave splitting film surface of the filter 05 is located at the spherical end focus of the first C-type microlens 03 .

[0024] Combined with Figure 1 It can be seen that one optical signal enters from the C1 port, the reflected optical signal is output from the R1 port, and the transmitted optical signal is output from the P1 port;

[0025] Another optical signal enters from the C2 port, the reflected optical signal is output from the R2 port, and the transmitted optical signal is output from the P2 port.

[0026] In the utility model, the C-type microlenses in the collimator and the reflector are arranged to have the same curvature of the spherical end, and in addition, the wave splitting film surface of the filter 05 is arranged at the focus of the spherical end of one of the C-type microlenses, so that the overall structure achieves the effect of consistent light beam convergence angle, and solves the problem that the coupling efficiency of the two light beams from C1 to P1 and from C2 to P2 often cannot reach the best at the same time; in addition, the overall structure has not been greatly changed, and a two-in-one device can still be formed to meet the uplink and downlink requirements, and the advantages of small overall structure volume and low cost are retained.

[0027] As a further solution of the utility model, the four-fiber reflector also includes a four-fiber pigtail 02, one end of which is connected to a No. 1 C-type microlens 03; the other end of the four-fiber pigtail 02 forms two light input ports and two reflected light output ports.

[0028] In conjunction with the attached drawings, the two optical input ports of the four-fiber pigtail 02 are C1 port and C2 port respectively, and the two reflected light output ports are R1 port and R2 port; in the four-fiber reflector of the utility model, the conventional G-type microlens is abandoned, and the C-type microlens is adopted, which overcomes the problem that in the two-in-one wavelength division multiplexer of the prior art, due to the structural difference between the G-type microlens and the C-type microlens, the light beam convergence angle cannot be completely the same, and ultimately the coupling efficiency of the two-way light beam from C1 to P1 and from C2 to P2 often cannot reach the best at the same time, resulting in part of the signal loss.

[0029] As a further solution of the utility model, the four-fiber pigtail 02 is enveloped and fixed in the first glass tube 01, and one end of the four-fiber pigtail 02 adapted to the first C-type microlens 03 protrudes from the first glass tube 01.

[0030] In this embodiment, since the four-fiber pigtail 02 has poor shaping effect due to its own characteristics, the first glass tube 01 is used to envelop the four-fiber pigtail 02 to form a fixed and stable structure.

[0031] As a further solution of the present invention, the No. 1 C-type microlens 03 and the filter 05 are integrated into the No. 2 glass tube 04 .

[0032] In this embodiment, it is through the docking effect of the No. 2 glass tube 04 that the docking fit, concentricity, etc. between the No. 1 C-type microlens 03 and the filter 05 can be kept consistent, ensuring that the wave splitting film surface of the filter 05 is located at the spherical end focus of the No. 1 C-type microlens 03.

[0033] As a further solution of the utility model, the dual-fiber collimator further comprises a dual-fiber pigtail 07, one end of the dual-fiber pigtail 07 is butted with an end of the second C-type microlens 06 away from the four-fiber reflector;

[0034] The other end of the dual-fiber pigtail 07 forms two transmission light output ports.

[0035] In this embodiment, after the two light paths are transmitted in the reflector and the collimator, the transmitted parts of the two light paths are output through two transmitted light output ports, that is, transmitted from the P1 port and the P2 port in the figure.

[0036] As a further solution of the present invention, the second C-type microlens 06 and the dual-fiber pigtail 07 are integrated in a third glass tube 08 .

[0037] In this embodiment, the third glass tube 08 is used to envelop the dual-fiber pigtail 07 to form a stable structure, and to stably connect the second C-type microlens 06 and the dual-fiber pigtail 07 .

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-in-one wavelength division multiplexer with a new structure, comprising a four-fiber reflector and a dual-fiber collimator, characterized in that: The four-fiber reflector and the dual-fiber collimator have the same convergence angle for the light beam, so as to optimize the light beam coupling efficiency; The four-fiber reflector and the dual-fiber collimator respectively include a first C-type microlens (03) and a second C-type microlens (06), and the spherical end curvatures of the first C-type microlens (03) and the second C-type microlens (06) are the same, so as to achieve a consistent convergence angle for the light beam; The four-fiber reflector also includes a filter (05), and the wave splitting film surface of the filter (05) is located at the spherical end focus of the first C-type microlens (03).

2. The two-in-one wavelength division multiplexer of a new structure according to claim 1 is characterized in that: The four-fiber reflector also includes a four-fiber pigtail (02), one end of which is connected to a No. 1 C-type microlens (03); the other end of the four-fiber pigtail (02) forms two light input ports and two reflected light output ports.

3. The two-in-one wavelength division multiplexer with a new structure according to claim 2 is characterized in that: The four-fiber pigtail (02) is wrapped around and fixed in a first glass tube (01), and one end of the four-fiber pigtail (02) adapted to the first C-type microlens (03) protrudes from the first glass tube (01).

4. The two-in-one wavelength division multiplexer with a new structure according to claim 1 is characterized in that: The No. 1 C-type microlens (03) and the filter (05) are integrated in the No. 2 glass tube (04).

5. The two-in-one wavelength division multiplexer with a new structure according to claim 2 is characterized in that: The dual-fiber collimator further comprises a dual-fiber pigtail (07), one end of the dual-fiber pigtail (07) being butt-jointed with an end of the second C-type microlens (06) away from the four-fiber reflector; The other end of the dual-fiber pigtail (07) forms two transmission light output ports.

6. The two-in-one wavelength division multiplexer with a new structure according to claim 5 is characterized in that: The No. 2 C-type microlens (06) and the dual-fiber pigtail (07) are integrated in a No. 3 glass tube (08).

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