Thin film interference filter type wavelength division multiplexing device

Abstract

The utility model discloses a thin film interference filter type wavelength division multiplexing device, which comprises a wavelength division multiplexing device main body, the wavelength division multiplexing device main body comprises an outer shell, one end of the outer shell is provided with a single optical fiber collimator, one end of the outer shell is provided with a single optical fiber body through the single optical fiber collimator, and the single optical fiber body is provided with an optical fiber. A double-optical-fiber body is arranged in the outer shell; by designing the drying and dehumidifying mechanism, before the wavelength division multiplexing device main body is used, an outer protective sleeve is hermetically sleeved on the outer surface of an outer shell and is fixed, the outer protective sleeve and the outer surface of the outer shell form a storage groove after being fixedly mounted, and a proper amount of drying agent is injected into the storage groove through an inlet; when the wavelength division multiplexing device main body is installed in a dark and humid place for use and the interior is humid, the interior of the outer shell is subjected to moisture absorption and drying treatment by a drying agent through the air holes, so that the wavelength division multiplexing device main body is always dry for use after being installed for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of wavelength division multiplexing devices, and in particular relates to a thin film interference filter type wavelength division multiplexing device. Background Art

[0002] Existing wavelength division multiplexing devices are wave splitting (or combining) devices that can selectively separate or couple lightwave signals from light sources, optical fibers, integrated circuits, or other optical waveguides. When the wavelength division multiplexing device is in use, the light signal emitted from one optical fiber in the dual-fiber body is collimated and expanded by a C-lens body and incident on the high-reflection surface of the thin-film interference filter body. A portion of the light at the transmission wavelength will pass through the thin-film interference filter body, be received by the single-fiber collimator, and be coupled into the optical fiber. The remaining light is reflected by the thin-film interference filter body and coupled through the C-lens to the other optical fiber in the dual-fiber body, thereby achieving the purpose of wave splitting. Conversely, wave combining can be achieved.

[0003] According to a thin film interference filter type wavelength division multiplexing device disclosed in the authorized patent application No. 01263441.7, it is known that when the existing wavelength division multiplexing device is used after installation, when the wavelength division multiplexing device is placed in a certain dark and humid location for a long time after installation, when the external moisture enters the interior of the wavelength division multiplexing device and causes moisture, it is not convenient to quickly dry the internal moisture, which makes the long-term moisture inside the wavelength division multiplexing device easy to cause damage, and reduces the use effect, affecting the convenience of drying and dehumidifying the interior of the wavelength division multiplexing device when it is installed and used in a humid place. To this end, the utility model proposes a thin film interference filter type wavelength division multiplexing device. Utility Model Content

[0004] The purpose of the present utility model is to provide a thin-film interference filter-type wavelength division multiplexing device to solve the problem raised in the above-mentioned background technology that when the wavelength division multiplexing device is placed in a dark and humid location for a long time after installation, when external moisture enters the interior of the wavelength division multiplexing device and causes moisture, it is inconvenient to quickly dry the internal moisture, which makes the long-term moisture inside the wavelength division multiplexing device prone to damage and reduces the use effect.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a thin-film interference filter-type wavelength division multiplexing device, comprising a wavelength division multiplexing device body, the wavelength division multiplexing device body comprising an outer shell, one end of the outer shell being provided with a single-fiber collimator, one end of the outer shell being provided with a single-fiber body mounted thereon via the single-fiber collimator, a dual-fiber body being disposed within the outer shell, a C-lens mounting body being fixed to an end of the dual-fiber body within the outer shell, a C-lens mounting body being disposed within the C-lens mounting body at an end of the dual-fiber body, a thin-film interference filter body being disposed at an end of the C-lens mounting body, and the wavelength division multiplexing device body further comprising:

[0006] A drying and dehumidifying mechanism, comprising a desiccant storage assembly disposed on the outer surface of the housing, a limit locking assembly being provided at the connection between one end of the desiccant storage assembly and one end of the outer surface of the housing, and a rotating fixing assembly being provided at the connection between the other end of the desiccant storage assembly and the other end of the outer surface of the housing;

[0007] The reinforcing support mechanism includes a reinforcing support assembly disposed at an inner edge of the desiccant storage assembly.

[0008] Preferably, the desiccant storage assembly includes an outer protective sleeve arranged on the outer surface of the outer shell, a storage groove is formed at the connection between the inner surface of the outer protective sleeve and the outer surface of the outer shell, and a plurality of air holes are opened on the inner surface of the storage groove.

[0009] Preferably, rubber sealing rings are mounted on both ends of the inner surface of the outer protective sleeve, an inlet is provided at one end of the outer surface of the outer protective sleeve, and a sealing cover is threadedly rotated on the end of the inlet.

[0010] Preferably, the limiting snap-fit ​​assembly includes a limiting ring integrally formed on one end of the outer surface of the outer protective sleeve, a clamping hole is provided at the edge of the limiting ring, and a clamping head is integrally formed at the end edge of the outer protective sleeve.

[0011] Preferably, the internal structure of the clamping head is consistent with that of the clamping hole, and the end of the outer protective sleeve and the limiting ring are connected by clamping the clamping head with the clamping hole.

[0012] Preferably, the rotation fixing assembly includes an external thread structure provided on the other end of the outer surface of the housing, and the end of the outer protective sleeve is rotationally fixed with an internal thread fixing ring via the external thread structure.

[0013] Preferably, the reinforcement support assembly includes a reinforcement external threaded rod provided at the inner edge of the outer protective sleeve, and an inner surface of the reinforcement external threaded rod is threadedly rotated to form an internal threaded hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By designing a drying and dehumidifying mechanism, before the wavelength division multiplexing device body is used, the outer protective sleeve can be sealed and fitted onto the outer surface of the outer shell and fixed. After the outer protective sleeve is fixedly installed, a storage groove is formed with the outer surface of the outer shell. A proper amount of desiccant is injected into the storage groove through an inlet. When the wavelength division multiplexing device body is installed in a dark and humid place and the interior becomes damp, the desiccant absorbs moisture from the interior of the outer shell through the air vents and dries it. This ensures that the wavelength division multiplexing device body can be used dry for a long time after installation, and is not easily damaged by moisture. This improves the convenience of drying and dehumidifying the interior of the wavelength division multiplexing device body after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the utility model;

[0018] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of part A;

[0019] Figure 4 This is a partial cross-sectional structural diagram of the outer shell, outer protective sleeve and storage tank of the utility model;

[0020] Figure 5 This is a partial structural diagram of the internal threaded hole, reinforced external threaded rod and outer protective sleeve of the utility model;

[0021] In the figure: 100, wavelength division multiplexing device body; 101, outer shell; 1011, outer protective sleeve; 1012, inlet; 1013, internal thread fixing ring; 1014, external thread structure; 1015, storage slot; 1016, vent hole; 1017, limit ring; 1018, clamping hole; 1019, clamping head; 1010, rubber sealing ring; 102, single optical fiber body; 103, dual optical fiber body; 104, C lens mounting body; 105, C lens body; 106, single optical fiber collimator; 107, thin film interference filter body; 108, internal thread hole; 1081, strengthening external thread rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 5The utility model provides a technical solution: a thin film interference filter type wavelength division multiplexing device, including a wavelength division multiplexing device body 100, the wavelength division multiplexing device body 100 includes an outer shell 101, one end of the outer shell 101 is provided with a single fiber collimator 106, one end of the outer shell 101 is installed with a single fiber body 102 through the single fiber collimator 106, the inner part of the outer shell 101 is provided with a dual fiber body 103, the end of the dual fiber body 103 is located inside the outer shell 101 and a C lens mounting body 104 is fixed thereto, the inner part of the C lens mounting body 104 is provided with a C lens body 105 located at the end of the dual fiber body 103, the end of the C lens mounting body 104 A thin-film interference filter body 107 is provided. When the wavelength division multiplexing device body 100 is installed and used, the optical signal emitted from one optical fiber on the dual-fiber body 103 is collimated and expanded by the C lens body 105 and incident on the high-reflection surface of the thin-film interference filter body 107. A portion of the light of the transmission wavelength will pass through the thin-film interference filter body 107, be received by the single-fiber collimator 106 and coupled into the optical fiber. The remaining light is reflected by the thin-film interference filter body 107, and is coupled to the other optical fiber inside the dual-fiber body 103 through the C lens body 105, thereby achieving the purpose of wavelength separation. Conversely, wavelength combination can be achieved. The wavelength division multiplexing device body 100 is also provided with:

[0024] A drying and dehumidifying mechanism includes a desiccant storage assembly disposed on the outer surface of the outer shell 101. A limit locking assembly is disposed at the connection between one end of the desiccant storage assembly and one end of the outer surface of the outer shell 101. A rotating fixing assembly is disposed at the connection between the other end of the desiccant storage assembly and the other end of the outer surface of the outer shell 101. The wavelength division multiplexing device body 100 can be fixedly installed in a humid place for a long time. When the interior becomes damp during long-term use, the drying and dehumidifying mechanism performs drying and dehumidifying treatment on the interior of the wavelength division multiplexing device body 100. This ensures that the wavelength division multiplexing device body 100 remains dry during long-term installation, thereby improving the convenience of drying and dehumidifying the interior of the wavelength division multiplexing device body 100 during use after installation.

[0025] In order to facilitate the internal drying and dehumidification of the wavelength division multiplexing device body 100 through the desiccant storage component, in this embodiment, preferably, the desiccant storage component includes an outer protective sleeve 1011 arranged on the outer surface of the outer shell 101, and rubber sealing rings 1010 are installed at both ends of the inner surface of the outer protective sleeve 1011, so that the outer protective sleeve 1011 is closed on the outer surface of the outer shell 101 and sealed by the rubber sealing ring 1010. The inner surface of the outer protective sleeve 1011 is sealed with the outer surface of the outer shell 101. A storage groove 1015 is formed at the outer surface connection, and a plurality of ventilation holes 1016 are opened on the inner surface of the storage groove 1015. An inlet 1012 is provided at one end of the outer surface of the outer protective sleeve 1011. A sealing cover is screwed on the end of the inlet 1012. An appropriate amount of desiccant is injected into the interior of the storage groove 1015 through the inlet 1012 again. The desiccant absorbs moisture and dries the interior of the outer shell 101 through the ventilation holes 1016, so that the wavelength division multiplexing device body 100 can be installed for a long time and always dry.

[0026] In order to facilitate the installation of one end of the outer protective sleeve 1011 by the limiting clamping assembly and facilitate fixed installation and use, in this embodiment, preferably, the limiting clamping assembly includes a limiting ring 1017 integrally formed on one end of the outer surface of the outer protective sleeve 1011, and a clamping hole 1018 is provided at the edge of the limiting ring 1017. A clamping head 1019 is integrally formed at the end edge of the outer protective sleeve 1011. After the outer protective sleeve 1011 is closed on the outer surface of the outer shell 101, when one end of the outer protective sleeve 1011 contacts the surface of the limiting ring 1017, the clamping head 1019 is clamped inside the clamping hole 1018, so that the outer protective sleeve 1011 can be fixed again after the limiting clamping installation.

[0027] In order to facilitate the fixed installation of the outer protective sleeve 1011 and then fix the end again after the outer protective sleeve 1011 is limited and locked by the rotating fixing component, in this embodiment, preferably, the rotating fixing component includes an external thread structure 1014 opened at the other end of the outer surface of the outer shell 101, and the end of the outer protective sleeve 1011 is rotated and fixed with an internal thread fixing ring 1013 through the external thread structure 1014. After the outer protective sleeve 1011 is limited and locked and installed on the outer surface of the outer shell 101, the external thread fixing ring 1013 is rotated by the external thread structure 1014 to reinforce the installation of the outer protective sleeve 1011.

[0028] The reinforcing support mechanism includes a reinforcing support assembly arranged at the inner edge of the desiccant storage assembly, which can fix the outer protective sleeve 1011 of the wavelength division multiplexing device body 100 on the outer surface of the outer shell 101 before installation and use. The reinforcing support mechanism will reinforce the support installation of the outer protective sleeve 1011. After the outer protective sleeve 1011 is installed, it is not easy to be deformed or damaged when it is squeezed or pressed. The reinforced support installation improves the reinforced support effect of the wavelength division multiplexing device body 100 after the outer protective sleeve 1011 is fixedly installed when in use.

[0029] In order to facilitate the reinforced support installation of the outer protective sleeve 1011 through the reinforced support assembly, in this embodiment, preferably, the reinforced support assembly includes a reinforced external threaded rod 1081 opened at the inner edge of the outer protective sleeve 1011, and the inner surface of the reinforced external threaded rod 1081 is threaded with an internal threaded hole 108, and the reinforced external threaded rod 1081 can be rotated and installed inside the internal threaded hole 108. The outer protective sleeve 1011 is reinforced and installed by the reinforced external threaded rod 1081, and is not easily deformed or damaged when subjected to heavy pressure or extrusion.

[0030] The working principle and usage process of the present invention are as follows: When using this thin-film interference filter type wavelength division multiplexing device, the optical signal emitted from one optical fiber on the dual-fiber body 103 is collimated and expanded by the C lens body 105, and is incident on the high-reflective surface of the thin-film interference filter body 107. A portion of the light of the transmission wavelength will pass through the thin-film interference filter body 107, be received by the single-fiber collimator 106, and be coupled into the optical fiber. The remaining light is reflected by the thin-film interference filter body 107, and is coupled to the other optical fiber inside the dual-fiber body 103 through the C lens body 105, thereby achieving the purpose of wavelength separation. Conversely, wavelength combination can be achieved.

[0031] Then, before the wavelength division multiplexing device body 100 is used, the outer protective sleeve 1011 is fitted on the outer surface of the outer shell 101 until the bottom end of the outer protective sleeve 1011 contacts the surface of the limit ring 1017, and the clamp head 1019 is clamped and combined inside the clamping hole 1018. After the outer protective sleeve 1011 is clamped and installed, the inner surface of the outer protective sleeve 1011 and the surface of the outer shell 101 are sealed and fixed by the rubber sealing ring 1010. The inner thread fixing ring 1013 is rotated at the other end of the outer shell 101 through the external thread structure 1014 to squeeze the other end of the outer protective sleeve 1011, so as to facilitate the outer protective After the sleeve 1011 is fixedly installed, a storage groove 1015 is formed on the surface of the outer shell 101. At this time, an appropriate amount of desiccant is injected into the storage groove 1015 through the inlet 1012. The inlet 1012 is fixed again by the sealing cover. When the wavelength division multiplexing device body 100 is installed in a dark and humid place and the interior becomes damp, the desiccant can absorb moisture from the interior of the outer shell 101 through the air vent 1016 to dry it. This ensures that the wavelength division multiplexing device body 100 is always dry during long-term installation and use, and is less likely to be damaged by moisture. This improves the convenience of drying and dehumidifying the interior of the wavelength division multiplexing device body 100 after installation and use.

[0032] Finally, before the wavelength division multiplexing device body 100 is installed and used, the internal threaded hole 108 can be rotated inside the reinforced external threaded rod 1081 to fix the internal threaded hole 108 inside the outer protective sleeve 1011, so that when the outer surface of the outer protective sleeve 1011 is subjected to heavy pressure or extrusion after being fixed and installed, the internal threaded hole 108 can strengthen the protection of the outer surface of the outer protective sleeve 1011, and it is not easy to be deformed or damaged when being squeezed or under heavy pressure, thereby improving the support effect of the wavelength division multiplexing device body 100 after the outer protective sleeve 1011 is fixed and installed when in use.

[0033] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thin film interference filter type wavelength division multiplexing device, comprising a wavelength division multiplexing device body (100), the wavelength division multiplexing device body (100) comprising an outer shell (101), one end of the outer shell (101) being provided with a single fiber collimator (106), one end of the outer shell (101) being provided with a single fiber body (102) being installed via the single fiber collimator (106), a dual fiber body (103) being provided inside the outer shell (101), an end of the dual fiber body (103) being located inside the outer shell (101) and a C lens mounting body (104) being fixed thereto, a C lens body (105) being provided inside the C lens mounting body (104) at the end of the dual fiber body (103), and a thin film interference filter body (107) being provided at the end of the C lens mounting body (104), wherein: The wavelength division multiplexing device body (100) is further provided with: A drying and dehumidifying mechanism, comprising a desiccant storage component arranged on the outer surface of an outer shell (101), a limited locking component being provided at a connection between one end of the desiccant storage component and one end of the outer surface of the outer shell (101), and a rotating fixing component being provided at a connection between the other end of the desiccant storage component and the other end of the outer surface of the outer shell (101); The reinforcing support mechanism includes a reinforcing support assembly disposed at an inner edge of the desiccant storage assembly.

2. The thin film interference filter type wavelength division multiplexing device according to claim 1, characterized in that: The desiccant storage assembly comprises an outer protective sleeve (1011) arranged on the outer surface of the outer shell (101), a storage groove (1015) is formed at the connection between the inner surface of the outer protective sleeve (1011) and the outer surface of the outer shell (101), and a plurality of air holes (1016) are opened on the inner surface of the storage groove (1015).

3. The thin film interference filter type wavelength division multiplexing device according to claim 2, characterized in that: Both ends of the inner surface of the outer protective sleeve (1011) are snap-fitted with rubber sealing rings (1010), and one end of the outer surface of the outer protective sleeve (1011) is provided with an inlet (1012), and the end of the inlet (1012) is threadedly rotated with a sealing cover.

4. The thin film interference filter type wavelength division multiplexing device according to claim 2, characterized in that: The limiting snap-fit ​​assembly comprises a limiting ring (1017) integrally formed on one end of the outer surface of the outer protective sleeve (1011), a clamping hole (1018) is provided at the edge of the limiting ring (1017), and a clamping head (1019) is integrally formed at the end edge of the outer protective sleeve (1011).

5. The thin film interference filter type wavelength division multiplexing device according to claim 4, characterized in that: The internal structure of the clamping head (1019) and the clamping hole (1018) are consistent, and the end of the outer protective sleeve (1011) and the limiting ring (1017) are clamped and connected with the clamping hole (1018) through the clamping head (1019).

6. The thin film interference filter type wavelength division multiplexing device according to claim 2, characterized in that: The rotation fixing assembly comprises an external thread structure (1014) provided at the other end of the outer surface of the outer shell (101), and the end of the outer protective sleeve (1011) is rotationally fixed with an internal thread fixing ring (1013) via the external thread structure (1014).

7. The thin film interference filter type wavelength division multiplexing device according to claim 2, characterized in that: The reinforcing support assembly comprises a reinforcing external threaded rod (1081) provided at the inner edge of the outer protective sleeve (1011), and an internal threaded hole (108) is formed on the inner surface of the reinforcing external threaded rod (1081) through a threaded rotation.

Images