BOX and external light splitting device hybrid packaged single-fiber three-transmitting and three-receiving optical device

Abstract

The utility model discloses a BOX and external light splitting device hybrid packaged single-fiber three-transmitting and three-receiving optical device, which comprises a metal shell, and a BOX shell and an optical fiber adapter are respectively welded outside two opposite ends of the metal shell; a first receiving detector and a third receiving detector are arranged on one side of the metal shell, a second receiving detector is arranged on the other opposite side of the metal shell, and the second receiving detector and the third receiving detector are located on the same straight line; a wave separator is installed in the metal shell, a first reflector and a second reflector are arranged in the portions, outside the two ends of the wave separator, of the metal shell respectively, and the first reflector is located between the second receiving detector and the third receiving detector; the light splitting device is arranged outside the BOX, so that the packaging complexity is effectively reduced, the port integration density is improved, the product reliability is improved, the optimal combination of the performance of the three-transmitting and three-receiving optical device and the packaging process is achieved, and the practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communications, in particular to a single-fiber three-transmitter and three-receiver optical device which is a hybrid package of a BOX and an external optical splitter. Background Art

[0002] 50G PON deployment requires compatibility with the three-generation PON tri-mode transmission (GPON, 10GPON, and 50GPON), requiring simultaneous transmission of three different wavelengths in both upstream and downstream directions. Existing traditional PON optical devices offer limited transmission channels, including single-fiber one transmitter and two receivers, single-fiber two transmitters and one receiver, or single-fiber two transmitters and two receivers. These cannot meet the tri-mode transmission requirements of 50G PON. Therefore, a single-fiber three-transmitter, three-receiver optical device is needed to meet these transmission requirements.

[0003] Furthermore, market demands demand a certain level of cost-effectiveness in optoelectronic products. While some existing optical components with three transmitters and three receivers are integrated, these are few and far between. These components are not only complex and expensive to manufacture, but also have low port density, hindering market adoption. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a single-fiber three-transmitter and three-receiver device with a rationally structured BOX and an external optical splitter hybrid package, thereby effectively reducing the packaging complexity, helping to improve the density of port integration, and improving product reliability, achieving the optimal combination of the performance of the three-transmitter and three-receiver device and the packaging process, and having good practicality.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A single-fiber three-transmitter, three-receiver device in a hybrid package of a BOX and an external optical splitter comprises a metal shell, with a BOX shell and an optical fiber adapter welded to the outside of opposite ends of the metal shell; a first receiving detector and a third receiving detector are provided on one side of the metal shell, and a second receiving detector is provided on the other opposite side of the metal shell, and the second and third receiving detectors are located on the same straight line; a wave splitter is installed in the metal shell, and a first reflector and a second reflector are respectively arranged in the metal shell outside the two ends of the wave splitter, and the first reflector is located between the second and third receiving detectors.

[0007] As a further improvement of the above technical solution:

[0008] The first reflector is provided with two mutually perpendicular reflective surfaces, and the two reflective surfaces are arranged at an angle of 45 degrees toward the second receiving detector and the third receiving detector respectively.

[0009] The first reflector is a square prism, and the two reflective surfaces are two adjacent surfaces of the square prism.

[0010] The second reflector is provided with a reflective surface which is arranged obliquely toward the first receiving detector.

[0011] The second reflector is a right-angle prism, and the reflective surface is the inclined surface of the prism.

[0012] The demultiplexer is a Z-Block optical component. The demultiplexer end surface facing the optical fiber adapter is equipped with a filter 1, which is located in the middle of the demultiplexer end surface. The light in the demultiplexer passes through the filter 1 and then is emitted to the reflector 2.

[0013] The end face of the wave splitter facing the BOX shell is equipped with three filters 2 in order, and two adjacent filters 2 are arranged facing the two reflective surfaces of the reflector 1 respectively. The light in the wave splitter passes through the two filters 2 and then is emitted to the two reflective surfaces of the reflector 1.

[0014] A combiner is installed in the BOX shell. The combined light emitted from the BOX shell passes through the splitter and then converges to the optical fiber adapter through the ferrule end lens; three groups of transmitting lasers are installed in the BOX shell outside the light input end of the combiner, and a lens is arranged between each transmitting laser and the light input end; an isolator is installed in the BOX shell outside the light output end of the combiner.

[0015] The combiner is a Z-Block optical component or a PBS optical component.

[0016] The first receiving detector, the second receiving detector, and the third receiving detector are respectively packaged in three corresponding TO packages, and the three TO packages are fixed on the metal housing via optical glue.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By placing the optical splitter outside the BOX, the utility model effectively reduces the packaging complexity, helps to increase the density of port integration, improves product reliability, and achieves the optimal combination of the performance of the three-transmitter and three-receiver optical device and the packaging process, with good practicality;

[0019] The utility model also has the following advantages:

[0020] The three-transmitter and three-receiver device of this utility model increases the optical port density by 50%, the maximum rate by 5 times, and supports the coexistence of three generations of PON. While improving the maximum rate, it does not change the existing networking structure and can effectively reduce the cost of access network service deployment.

[0021] The utility model adopts an external wave splitter, combined with reflector 1 and reflector 2 located at both ends of the wave splitter, to match the layout requirements of three groups of receiving detectors, especially realizing the requirement of arranging the second receiving detector and the third receiving detector in opposite directions through reflector 1. The structural layout is compact and reasonable, effectively reducing the number of components, simplifying the process, and the cost is moderate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the optical path of the present invention.

[0023] Figure 2 It is a structural diagram of the present utility model.

[0024] Figure 3 This is another structural diagram of the present utility model.

[0025] Including: 1. Transmitting laser; 2. Combiner; 3. Box shell; 4. Reflector 1; 5. Wave splitter; 6. Metal shell; 7. Reflector 2; 8. Fiber optic adapter;

[0026] 21. Lens; 22. Isolator;

[0027] 51. Filter 1; 52. Filter 2;

[0028] 81. Ferrule end lens;

[0029] 91. First receiving detector; 92. Second receiving detector; 93. Third receiving detector. DETAILED DESCRIPTION

[0030] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0031] like Figure 1 、 Figure 2 and Figure 3 As shown, a single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter device in this embodiment includes a metal shell 6, and a BOX shell 3 and an optical fiber adapter 8 are respectively welded to the outside of the opposite ends of the metal shell 6; a first receiving detector 91 and a third receiving detector 93 are provided on one side of the metal shell 6, and a second receiving detector 92 is provided on the other side opposite to the metal shell 6, and the second receiving detector 92 and the third receiving detector 93 are located on the same straight line; a wave splitter 5 is installed in the metal shell 6, and a reflector 1 4 and a reflector 2 7 are respectively arranged in the metal shell 6 located outside the two ends of the wave splitter 5, and the reflector 1 4 is located between the second receiving detector 92 and the third receiving detector 93.

[0032] In this embodiment, an external splitter 5 is used, combined with reflector 1 4 and reflector 2 7 located at both ends of the splitter 5, to match the layout requirements of the three groups of receiving detectors, especially the requirement of arranging the second receiving detector 92 and the third receiving detector 93 in opposite directions is realized through reflector 1 4. The structural layout is compact and reasonable, effectively reducing the number of components, simplifying the process, and the cost is moderate.

[0033] Two mutually perpendicular reflecting surfaces are provided on the reflector 14, and the two reflecting surfaces are arranged at a 45° angle toward the second receiving detector 92 and the third receiving detector 93; thereby, the two separated lights can be reflected separately by the reflector 14, and the two lights can be ensured to be emitted in opposite directions on the same straight line after reflection.

[0034] The reflector 1 4 is a square prism, and the two reflective surfaces are two adjacent surfaces of the square prism. By adopting the square prism, the number of components is effectively reduced and simplified, and the reflection and emission of the two different light paths after splitting are satisfied.

[0035] In this embodiment, the reflective surface on the reflector 1 4 is arranged at a 45-degree angle. The two beams of light split by the wave splitter 5 are parallel to each other and emitted in nearly horizontal directions to the reflective surface of the reflector 1 4. The horizontal light path is converted into a vertical light path through reflection by the reflective surface of the reflector 1 4, and the two beams are emitted in opposite directions.

[0036] The second reflector 7 is provided with a reflective surface arranged obliquely toward the first receiving detector 91 . The light split by the wave splitter 5 is reflected by the reflective surface on the second reflector 7 and then emitted to the first receiving detector 91 .

[0037] The second reflector 7 is a right-angle prism, and the reflecting surface is the inclined surface of the prism.

[0038] In this embodiment, by using square prisms and right-angled triangular prisms, while satisfying the light path reflection, components are simplified and the reliable and stable assembly of components inside the metal shell 6 is effectively guaranteed.

[0039] In this embodiment, the reflective surface on the second reflector 7 is arranged at an angle, and the light split by the splitter 5 is incident on the reflective surface at an angle, and is reflected by the reflective surface and converted into a vertical light path to be emitted toward the first receiving detector 91.

[0040] The wavelength splitter 5 is a Z-Block optical component. The end face of the wavelength splitter 5 facing the optical fiber adapter 8 is equipped with a filter 51. The filter 51 is located in the middle of the end face of the wavelength splitter 5. After the light in the wavelength splitter 5 passes through the filter 51, it is emitted toward the reflector 2 7.

[0041] In this embodiment, the light emitted from the optical fiber adapter 8 enters the demultiplexer 5 , is reflected once, transmits through the filter 1 51 , and is reflected by the inclined surface of the reflector 2 7 before entering the first receiving detector 91 .

[0042] The end face of the wave splitter 5 facing the BOX shell 3 is equipped with three filter 2s 52 in an orderly manner. Two adjacent filter 2s 52 are arranged facing the two reflective surfaces of the reflector 1 4 respectively. The light in the wave splitter 5 passes through the two filter 2s 52 and then is emitted to the two reflective surfaces of the reflector 1 4.

[0043] In this embodiment, the light emitted by the optical fiber adapter 8 enters the demultiplexer 5, and after secondary and quadruple reflections, it is respectively transmitted through the corresponding filter 2 52 to be split, and then reflected by the reflective surface of the reflector 1 4 and incident on the second receiving detector 92 and the third receiving detector 93 in opposite directions.

[0044] A combiner 2 is installed in the BOX shell 3. The combined light emitted from the BOX shell 3 passes through the demultiplexer 5 and then converges to the optical fiber adapter 8 through the ferrule end lens 81; three groups of transmitting lasers 1 are correspondingly installed in the BOX shell 3 outside the light input end of the combiner 2, and a lens 21 is arranged between each transmitting laser 1 and the light input end; an isolator 22 is installed in the BOX shell 3 outside the light output end of the combiner 2.

[0045] The combiner 2 is a Z-Block optical component or a PBS optical component.

[0046] In this embodiment, either the Z-Block optical component or the PBS optical component may adopt a conventional structure, which can realize merging the three light beams emitted by the three groups of emitting lasers 1 into one light beam.

[0047] The first receiving detector 91 , the second receiving detector 92 , and the third receiving detector 93 are respectively packaged in three corresponding TO packages, and the three TO packages are fixed on the metal housing 6 via optical glue.

[0048] The optical port density of the three-transmitter and three-receiver device in this embodiment is increased by 50%, the maximum rate is increased by 5 times, and it also supports the coexistence of three generations of PON. While improving the maximum rate, it does not change the existing networking structure and can effectively reduce the cost of access network service deployment.

[0049] In this embodiment, the optical path sequence at the transmitting end is as follows: the light emitted by the three transmitting lasers 1 is collimated into parallel light by the lens 21, and then the three parallel lights are combined into one parallel light by the combiner 2. After passing through the isolator 22, the light is emitted from the BOX shell 3 and enters the demultiplexer 5 in the metal shell 6. After passing through the demultiplexer 5, the light is converged by the core end lens 81 to the optical fiber adapter 8.

[0050] In this embodiment, the optical path sequence at the receiving end is as follows: the converged light emitted by the optical fiber adapter 8 is collimated into parallel light through the ferrule end lens 81 and enters the demultiplexer 5. After being reflected once by the demultiplexer 5, the light is transmitted through the filter 1 51 to be split, and is reflected by the reflector 2 7 before entering the first receiving detector 91. The light in the demultiplexer 5 continues to reflect, and after being reflected twice and four times respectively, the light is transmitted through the corresponding filter 2 52 to be split, and is reflected by the corresponding reflective surfaces of the reflector 1 4 before entering the second receiving detector 92 and the third receiving detector 93 in opposite directions.

[0051] The utility model effectively reduces the packaging complexity by placing the wave splitter component outside the BOX, helps to increase the density of port integration, improves product reliability, and achieves the optimal combination of the performance of the three-transmitter and three-receiver optical device and the packaging process, with good practicality.

[0052] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A single-fiber three-transmitter, three-receiver device that combines a BOX and an external optical splitter in a hybrid package, characterized by: The invention comprises a metal shell (6), wherein a BOX shell (3) and an optical fiber adapter (8) are welded to the outside of opposite ends of the metal shell (6); a first receiving detector (91) and a third receiving detector (93) are arranged on one side of the metal shell (6), and a second receiving detector (92) is arranged on the other side of the metal shell (6), and the second receiving detector (92) and the third receiving detector (93) are located on the same straight line; a wave splitter (5) is installed in the metal shell (6), and a reflector 1 (4) and a reflector 2 (7) are arranged in the metal shell (6) outside the two ends of the wave splitter (5), and the reflector 1 (4) is located between the second receiving detector (92) and the third receiving detector (93).

2. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: The reflector 1 (4) is provided with two mutually perpendicular reflective surfaces, and the two reflective surfaces are arranged at an angle of 45 degrees toward the second receiving detector (92) and the third receiving detector (93).

3. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 2, characterized in that: The reflector 1 (4) is a square prism, and the two reflective surfaces are two adjacent surfaces of the square prism.

4. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: The second reflector (7) is provided with a reflective surface arranged obliquely toward the first receiving detector (91).

5. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 4, characterized in that: The second reflector (7) is a right-angle prism, and the reflecting surface is the inclined surface of the prism.

6. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: The demultiplexer (5) is a Z-Block optical component. The end face of the demultiplexer (5) facing the optical fiber adapter (8) is equipped with a filter (51). The filter (51) is located in the middle of the end face of the demultiplexer (5). After the light in the demultiplexer (5) passes through the filter (51), it is emitted toward the reflector (7).

7. The single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: The end face of the wave splitter (5) facing the BOX shell (3) is equipped with three filter 2s (52) in an orderly manner, and two adjacent filter 2s (52) are respectively arranged facing the two reflective surfaces on the reflector 1 (4). The light in the wave splitter (5) passes through the two filter 2s (52) and then is emitted to the two reflective surfaces of the reflector 1 (4).

8. The single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: A combiner (2) is installed in the BOX shell (3), and the combined light emitted from the BOX shell (3) passes through the splitter (5) and then converges to the optical fiber adapter (8) through the core end lens (81); three groups of transmitting lasers (1) are correspondingly installed in the BOX shell (3) located outside the light input end of the combiner (2), and a lens (21) is arranged between each transmitting laser (1) and the light input end; an isolator (22) is installed in the BOX shell (3) located outside the light output end of the combiner (2).

9. A single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 8, characterized in that: The combiner (2) is a Z-Block optical component or a PBS optical component.

10. The single-fiber three-transmitter and three-receiver device in a hybrid package of a BOX and an external optical splitter according to claim 1, characterized in that: The first receiving detector (91), the second receiving detector (92), and the third receiving detector (93) are respectively packaged in three corresponding TO packages, and the three TO packages are fixed on the metal housing (6) via optical glue.

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