CN211293470U

CN211293470U - DCMOB optical filter subassembly structure

Info

Publication number: CN211293470U
Application number: CN201921735675.5U
Authority: CN
Inventors: 郑杨杰; 冯兵兵; 王肖北
Original assignee: Auxora Shenzhen Inc
Current assignee: Auxora Shenzhen Inc
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-08-18
Anticipated expiration: 2029-10-16

Abstract

The utility model provides a DCMOB optical filter subassembly structure, which comprises a base, the base transmission face has on the base, be equipped with the incident area that is used for receiving incident optical signal on the base transmission face, the base still has and is used for carrying out the high reverse side that reflects to the incident optical signal that gets into in the base relatively with base transmission face, be equipped with on the base transmission face and be used for carrying out filterable filter set to the optical signal that comes through the plane of reflection, filter set is including arranging four optical filters that set up, every optical filter includes the optical filter face with the laminating of base transmission face and the optical filter transmission face relative with the optical filter face, the optical filter face has plated the WDM membrane, be equipped with at least one level on the optical filter face and set up the sword groove that is used for carrying out horizontal partition. Compared with the prior art, the structure has the advantages that the cutter grooves are formed in the surface of the filter membrane, so that the filter set can simultaneously meet the 4-channel Demux function and the 4-channel Mux function, the ROSA and TOSA functions are simultaneously realized on a single optical filter assembly, and the manufacturing cost of the optical transmission module is reduced.

Description

DCMOB optical filter subassembly structure

Technical Field

The utility model relates to a fiber network transmission field, especially a DCMOB optical filter subassembly structure.

Background

The Optical transmission module includes a single-mode Optical transmission module and a multi-mode Optical transmission module, and the overall product architecture includes an Optical sub-assembly (OSA) and an electronic sub-assembly (ESA). The Optical sub-modules can be further subdivided into Transmitter Optical Subassembly (TOSA) and Receiver Optical Subassembly (ROSA). In the prior art, a light receiving sub-module formed by using a thin film filter as a key element generally comprises 4 channels, the spacing between the channels is generally 0.75mm or 0.5mm, a ROSA or TOSA function is realized in use, two optical filter assemblies are required by adopting a traditional structure and a traditional manufacturing method to realize the ROSA and TOSA functions, the manufacturing process of a device is complex, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a DCMOB optical filter subassembly structure realizes ROSA and TOSA function simultaneously on single optical filter subassembly, reduces optical transmission module's manufacturing cost.

The utility model adopts the technical proposal that:

the utility model provides a DCMOB optical filter subassembly structure, which comprises a base, the base has the base transmission face, be equipped with the incident area that is used for receiving incident optical signal on the base transmission face, the base still has the high reverse side that is used for reflecting incident optical signal that gets into in the base with base transmission face relatively, be equipped with on the base transmission face and be used for carrying out the filter set that filters to the optical signal that comes through the plane of reflection, filter set is including arranging four light filters that set up, every light filter includes the filter face of laminating with base transmission face and the filter transmission face relative with filter face, the filter face has plated the WDM membrane, be equipped with at least one level on the filter face and set up the sword groove that is used for carrying out horizontal subregion with the filter face.

Preferably, each filter membrane surface is provided with a knife groove, and the knife groove divides the filter membrane surface into an upper filter membrane area and a lower filter membrane area.

Preferably, the incident region of the base transmission surface is provided with a steering prism for receiving an incident light signal and turning the incident light signal into the base.

More preferably, the turning prism includes three vertical planes and one inclined plane, and an angle α of the inclined plane to the one vertical plane satisfies 40.33 ° ± 0.05 °.

Preferably, the base transmission surface of the base is plated with a Ta2O5 film; the high reverse side of the base is plated with a high reverse film.

Preferably, the base is a glass block, and the glass block has four side faces and is cuboid in shape.

Preferably, the filter has four side surfaces and is shaped like a cuboid.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a DCMOB optical filter subassembly structure utilizes and sets up the sword groove on the filter membrane face of light filter for 4 passageway Demux functions and 4 passageway Mux functions are satisfied simultaneously to the filter set, realize ROSA and TOSA function simultaneously on single optical filter subassembly like this, reduce optical transmission module's manufacturing cost.

Drawings

Fig. 1 is a schematic diagram of a structure of a DCMOB optical filter assembly according to the present invention;

fig. 2 is a schematic diagram of a turning prism in a DCMOB optical filter assembly structure according to the present invention;

fig. 3 is a schematic diagram of a base in a DCMOB optical filter assembly structure according to the present invention;

fig. 4 is a schematic diagram of an optical filter in a DCMOB optical filter module structure according to the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 to 4 illustrate a preferred embodiment of a DCMOB optical filter module structure according to the present invention. As shown in fig. 1 to 4, a DCMOB (Dual-channel CWDM Micro optical wavelength) in the DCMOB optical filter assembly structure represents a Dual-channel coarse wavelength division multiplexing mini optical assembly, the entire DCMOB optical filter assembly structure includes a base 10, the base 10 has a base transmission surface 101, the base transmission surface 101 is provided with an incident region for receiving an incident optical signal, the base 10 further has a high reverse surface 102 opposite to the base for reflecting the incident optical signal entering into the base, the base transmission surface is provided with a filter set 20 for filtering the optical signal reflected by the reflection surface, the filter set 20 includes four filters arranged in an array, each filter includes a filter film surface 201 attached to the base transmission surface 101 and a filter transmission surface 202 opposite to the filter film surface, the filter film 201 is plated with a WDM film, the filter film surface 201 is provided with at least one knife slot 203 horizontally arranged for horizontally partitioning the filter, thus filter set 20 satisfies at least a 4-channel Demux function and at least a 4-channel Mux function, emitting 8 beams of light. The WDM film is a Wavelength Division Multiplexing film. The Demux function is a demultiplexing function; the Mux function is the multiplexing function.

The number N of the knife grooves of each filter in the filter set is more than or equal to 1, and the filter channels of the whole filter set are 8, 12 and 16 … …. As a preferred embodiment, as shown in fig. 4, a horizontal slit 203 is provided on the filter surface 201, and the slit 203 divides the filter surface into an upper filter area 2011 and a lower filter area 2011, so that the wavelength division multiplexing function can be simultaneously realized on the same filter surface 201.

The incident region of the base transmission surface 101 is provided with a turning prism 30 for receiving an incident light signal and turning the incident light signal into the base, so that the incident light signal incident in the horizontal direction can be turned to be incident into the base 10 by the action of the turning prism 30. As shown in fig. 2, the turning prism 30 includes three vertical planes 301 and one inclined plane 302, and an angle α between the inclined plane 301 and one vertical plane 301 satisfies 40.33 ° ± 0.05 °. According to the WDM film loss, the base loss and the turning prism loss of the light passing through the transmission process, the relative optical angle and the insertion loss of each light beam coming out of each optical filter can be influenced, for example, under the condition of 0.4-degree incident collimated light, the relative optical angle of the light coming out of each optical filter satisfies less than or equal to 0.15 degrees, and the insertion loss satisfies less than or equal to 1.35 dB.

As shown in fig. 1, as a preferred embodiment, four optical filters 20 for filtering the optical signal reflected by the reflection surface are arranged on the base transmission surface 101, the four optical filters 20 are respectively a first optical filter 21, a second optical filter 22, a third optical filter 23 and a fourth optical filter 24, and all the four optical filters are fixed on the base transmission surface 101. Each filter has four sides in the shape of a cuboid, wherein one pair of opposite sides is a filter film face 201 and a filter transmission face 202.

The base transmission surface 101 of the base 10 is plated with a Ta2O5 film (tantalum pentoxide film); the high reverse side 102 of the base 10 is coated with a High Reverse (HR) film, R > 99.8% @1260nm-1360 nm. In a preferred embodiment, the base 10 is a glass block having four sides and is shaped as a rectangular parallelepiped, wherein a pair of opposing sides are a base transmissive side 101 and a tall reverse side 102.

The working process of the structure is as follows: the four optical filters are exemplified by a cutter slot on each optical filter, a light beam multiplexed with 4 wave bands passes through two collimators to form two upper and lower collimated lights, the two upper and lower collimated lights are reflected and refracted by a steering prism and a base, and the four optical filters are divided into 8 light beams in different wave bands according to the central wavelength. Wherein the distance between the light beams is determined by the thickness of the base and the thickness of the filter.

To sum up, the technical scheme of the utility model can be fully effectual the above-mentioned utility model purpose of realization, just the utility model discloses a structure and functional principle all obtain abundant verification in the embodiment, can reach anticipated efficiency and purpose, do not deviating from the utility model discloses a under the prerequisite of principle and essence, can make multiple change or modification to the embodiment of utility model. Therefore, the present invention includes all the alternative contents within the scope mentioned in the claims, and all the equivalent changes made within the claims of the present invention are included in the claims of the present application.

Claims

1. The utility model provides a DCMOB optical filter subassembly structure, a serial communication port, including the base, the base has the base transmission face, be equipped with the incident area that is used for receiving incident optical signal on the base transmission face, the base still has the high reverse side that is used for reflecting the incident optical signal that gets into in the base with the base transmission face relatively, be equipped with on the base transmission face and be used for carrying out the filter set that filters to the light signal that comes through the plane of reflection, filter set is including arranging four optical filters that set up, every optical filter includes the optical filter face of laminating with base transmission face and the optical filter transmission face relative with the optical filter face, the optical filter face has plated the WDM membrane, be equipped with at least one level on the optical filter face and set up the sword groove that is used for carrying out horizontal subregion.

2. The DCMOB optical filter assembly structure of claim 1, wherein: each filter membrane surface is provided with a cutter groove which divides the filter membrane surface into an upper filter membrane area and a lower filter membrane area.

3. The DCMOB optical filter assembly structure of claim 1, wherein: and the incident area of the transmission surface of the base is provided with a steering prism for receiving incident light signals and transferring the incident light signals into the base.

4. The DCMOB optical filter assembly structure of claim 3, wherein: the turning prism comprises three vertical surfaces and an inclined surface, and the included angle alpha between the inclined surface and one vertical surface is 40.33 +/-0.05 degrees.

5. The DCMOB optical filter assembly structure of claim 1, wherein: the transmission surface of the base is plated with a Ta2O5 film; the high reverse side of the base is plated with a high reverse film.

6. The DCMOB optical filter assembly structure of claim 1, wherein: the base is a glass block, the glass block is provided with four side faces, and the shape of the glass block is a cuboid.

7. The DCMOB optical filter assembly structure of claim 1, wherein: the optical filter is provided with four side faces and is in a cuboid shape.