BOX and small-spacing TO hybrid packaged single-fiber three-transmitting and three-receiving optical device

Abstract

The utility model discloses a BOX and small-spacing TO hybrid packaged single-fiber three-transmitting and three-receiving optical device, which comprises a wave splitting assembly, and combined beam light emitted by a light combining assembly passes through the wave splitting assembly and then enters an optical fiber adapter to form a main optical path; the wave division assembly comprises a first filter obliquely located on the main light path, and two wave plates are arranged on the two sides of the main light path respectively. Light emitted by the optical fiber adapter is reflected to the first wave plate through the first filter, after the light is reflected by the first wave plate, one light beam is emitted to the first receiving detector through the second wave plate, and the other light beam is emitted to the second receiving detector through the fourth wave plate after being reflected by the first wave plate, the second wave plate and the third wave plate in sequence. The first receiving detector and the second receiving detector are adjacently arranged on the same side of the main optical path, so that the distance between the first receiving detector and the second receiving detector is effectively compressed, the total length of the optical device is greatly reduced, and the optical device is suitable for the application field of 50G PON or other three-transmitting and three-receiving optical devices needing small-size space.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to a single-fiber triple-transmission and triple-reception optical device with a hybrid package of a BOX and a small-spacing TO. Background Technique

[0002] During the deployment of 50G PON, it is necessary to be compatible with the triple-mode transmission of three generations of PON (the three generations of PON are GPON, 10G PON, and 50G PON), that is, to simultaneously meet the transmission requirements of three different wavelengths for both the upstream and downstream. Existing traditional PON optical devices have only single-fiber single-transmission and two-reception, single-fiber two-transmissions and one-reception, or single-fiber dual-transmission and dual-reception in the transmission channel, and cannot meet the triple-mode transmission requirements of 50G PON. Therefore, it is necessary to design a single-fiber triple-transmission and triple-reception optical device that can simultaneously meet the above transmission requirements.

[0003] In addition, with the market demand, optoelectronic products are required to have a certain cost performance. Although there are already individual integrated optical components with triple-transmission and triple-reception in the prior art, the types are very few. Not only is the product volume relatively large, but also the port density is low, which is not conducive to the marketization of the product. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a single-fiber triple-transmission and triple-reception optical device with a hybrid package of a BOX and a small-spacing TO, which has a reasonable structure, thereby greatly reducing the total length size of the optical device, being applicable to the application fields of 50G PON or other triple-transmission and triple-reception optical devices that require small-size spaces, and facilitating the marketization of the product.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A single-fiber triple-transmission and triple-reception optical device with a hybrid package of a BOX and a small-spacing TO includes a wavelength division component. A beam combining component is arranged behind the wavelength division component, and an optical fiber adapter is arranged in front of the wavelength division component. The combined beam emitted by the beam combining component passes through the wavelength division component and then enters the optical fiber adapter, forming a main optical path; the wavelength division component includes a first filter disposed obliquely on the main optical path, and two wave plates are respectively arranged on both sides of the main optical path, including wave plate 1 and wave plate 3 on one side of the main optical path, and wave plate 2 and wave plate 4 on the other side of the main optical path; the light emitted from the optical fiber adapter is reflected by the first filter to wave plate 1, and after being reflected by wave plate 1, one beam of light passes through wave plate 2 and is emitted to the first receiving detector, and the other beam of light is reflected by wave plate 1, wave plate 2, and wave plate 3 in sequence and then passes through wave plate 4 and is emitted to the second receiving detector; the first receiving detector and the second receiving detector are arranged adjacent to each other on the same side of the main optical path.

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

[0008] The first filter is disposed obliquely with an angle less than 45° relative to the main optical path.

[0009] The first filter is a wave plate with an inclination angle of 8° or 13°. The 8° wave plate is used in application scenarios with a wavelength interval of less than 20 nm, and the 13° wave plate is used in application scenarios with a wavelength interval of 20 to 50 nm.

[0010] The second wave plate is a band-pass filter. The optical paths reflected by the first wave plate and the third wave plate are both emitted in a direction perpendicular to the main optical path. The first wave plate, the second wave plate, and the third wave plate are all inclined and arranged outside the main optical path, and the fourth wave plate is arranged parallel to the main optical path outside.

[0011] A second filter is also inclined and arranged on the main optical path between the first filter and the fiber optic adapter. The light emitted from the fiber optic adapter is reflected by the second filter to the fifth wave plate, and is converted into an optical path perpendicular to the main optical path through the reflection of the fifth wave plate and then emitted to the third receiving detector.

[0012] A sixth wave plate is arranged at the light incident end of the third receiving detector, and the sixth wave plate is arranged parallel to the main optical path.

[0013] The third wave plate is a band-pass filter. The optical path reflected by the second wave plate to the third wave plate is split at the third wave plate. One path of light is incident on the third receiving detector after passing through the third wave plate, and the other path of light is incident on the second receiving detector after being reflected by the third wave plate.

[0014] The first wave plate is a band-pass filter. The optical path reflected by the first filter to the first wave plate is split at the first wave plate. One path of light is incident on the third receiving detector after passing through the first wave plate, and the other path of light is incident on the second wave plate after being reflected by the first wave plate.

[0015] It also includes a BOX housing. The optical combining component is located inside the BOX housing. Three groups of emitting lasers are sequentially arranged and encapsulated on one side of the optical combining component inside the BOX housing. The light emitted by the three groups of emitting lasers is combined into a collimated light beam by the optical combining component, and a window for the collimated light beam to exit is opened on the BOX housing. A first lens is evenly arranged between each single emitting laser and the optical combining component, and an isolator is arranged between the light output port of the optical combining component and the window of the BOX housing.

[0016] The wavelength division component is accommodated in a metal housing. The BOX housing and the fiber optic adapter are assembled at opposite ends of the metal housing by laser welding. Each receiving detector is encapsulated and accommodated in a corresponding TO package, and each TO package is bonded and fixed to the metal housing with optical glue. An insert end lens is arranged between the wavelength division component and the fiber optic adapter.

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

[0018] The utility model combines a BOX housing with a wave plate inside a metal housing, which not only effectively reduces the device cost, but also realizes a compression of more than 50% in the distance between the first receiving detector and the second receiving detector, greatly reducing the total length size of the optical device. It is applicable to the application fields of 50G PON or other three-transmitter and three-receiver optical devices that require small-size spaces, and helps to promote the marketization of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the optical path diagram of the first embodiment of the utility model.

[0020] Figure 2 It is the structural schematic diagram of the first embodiment of the utility model.

[0021] Figure 3 It is the optical path diagram of the second embodiment of the utility model.

[0022] Figure 4 It is the structural schematic diagram of the second embodiment of the utility model.

[0023] Figure 5 It is the optical path diagram of the third embodiment of the utility model.

[0024] Figure 6 It is the structural schematic diagram of the third embodiment of the utility model.

[0025] Wherein: 1. BOX housing; 2. First filter; 3. Second filter; 4. First receiving detector; 5. Second receiving detector; 6. Third receiving detector; 7. Ferrule end lens; 8. Fiber optic adapter;

[0026] 11. Transmitting laser; 12. First lens; 13. Beam combining component; 14. Isolator

[0027] 21. First wave plate; 22. Second wave plate; 23. Third wave plate; 24. Fourth wave plate;

[0028] 31. Fifth wave plate; 32. Sixth wave plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following combines the drawings to illustrate the detailed embodiments of the utility model.

[0030] As Figure 1As shown in the figure, a single-fiber triple-transmission and triple-reception optical device with a hybrid packaging of BOX and small-pitch TO in this embodiment includes a wavelength division component. A light combining component 13 is arranged behind the wavelength division component, and an optical fiber adapter 8 is arranged in front of the wavelength division component. The combined light emitted by the light combining component 13 passes through the wavelength division component and then enters the optical fiber adapter 8, forming a main optical path. The wavelength division component includes a first filter 2 inclined on the main optical path. Two wave plates are respectively arranged on both sides of the main optical path, including wave plate 1 21 and wave plate 3 23 on one side of the main optical path, and wave plate 2 22 and wave plate 4 24 on the other side of the main optical path. The light emitted from the optical fiber adapter 8 is reflected by the first filter 2 to wave plate 1 21. After being reflected by wave plate 1 21, one beam of light passes through wave plate 2 22 and is emitted to the first receiving detector 4, and the other beam of light is reflected by wave plate 1 21, wave plate 2 22, and wave plate 3 23 in sequence and then passes through wave plate 4 24 and is emitted to the second receiving detector 5. The first receiving detector 4 and the second receiving detector 5 are closely arranged on the same side of the main optical path.

[0031] In this embodiment, the distance between the first receiving detector 4 and the second receiving detector 5 can be minimized, and they form adjacent TOs with a small pitch. In actual operation, according to actual requirements, the first receiving detector 4 and the second receiving detector 5 can also be packaged in the same TO package.

[0032] In this embodiment, by using the first filter 2 externally placed in the BOX housing 1 and combining the reflection or transmission of wave plate 1 21, wave plate 2 22, wave plate 3 23, and wave plate 4 24, the wavelength division incidence of the first receiving detector 4 and the second receiving detector 5 outside wave plate 2 22 and wave plate 4 24 on the same side of the main optical path is realized.

[0033] The first filter 2 is inclined relative to the main optical path at an angle less than 45°, so that the light emitted from the light adapter 8 can be laterally reflected by the first filter 2.

[0034] The first filter 2 uses a wave plate with an inclination angle (α) of 8° or 13°. The 8° wave plate is used in application scenarios with a wavelength interval less than 20 nm, and the 13° wave plate is used in application scenarios with a wavelength interval of 20 to 50 nm.

[0035] In this embodiment, the actual angle of the first filter 2 can be determined in combination with the wavelength channel interval of the corresponding receiving end. The larger the angle of the first filter 2, the smaller the distance between the BOX housing 1 and the first receiving detector 4 close to it. The smaller the angle of the first filter 2, the larger the distance between the BOX housing 1 and the first receiving detector 4 close to it.

[0036] Wave plate two 22 is a band-pass filter, and the optical paths reflected by wave plate one 21 and wave plate three 23 are both emitted in a direction perpendicular to the main optical path; wave plate one 21, wave plate two 22, and wave plate three 23 are all inclined and arranged outside the main optical path, and wave plate four 24 is arranged parallel to the main optical path outside; thus effectively ensuring that the optical paths reflected by wave plate one 21 and wave plate three 23 can both be incident into the corresponding receiving detectors in a direction perpendicular to the main optical path.

[0037] It also includes a BOX housing 1. The light combining component 13 is located inside the BOX housing 1. Three sets of emitting lasers 11 are orderly arranged and encapsulated inside the BOX housing 1 on one side of the light combining component 13. The light emitted by the three sets of emitting lasers 11 is combined into a collimated light beam by the light combining component 13, and a window for the collimated light beam to exit is opened on the BOX housing 1; a lens one 12 is evenly arranged between each single emitting laser 11 and the light combining component 13, and an isolator 14 is arranged between the light output port of the light combining component 13 and the window of the BOX housing 1.

[0038] In this embodiment, the light combining component 13 can be a PBS optical component or a Z-Block optical component.

[0039] PBS optical component is the abbreviation of Polarizing Beamsplitters. The PBS optical component in this embodiment includes three optical components corresponding to the three sets of laser emitters one by one. Each single optical component is composed of two right-angled prisms glued together at the hypotenuse, and a polarization beam splitting film is plated on the prism inclined surface.

[0040] The wavelength division component is accommodated in a metal housing. The BOX housing 1 and the fiber optic adapter 8 are laser welded and assembled at opposite ends of the metal housing. The structure form of hybrid encapsulation of the BOX housing 1 and the external wavelength division component helps to reduce the device size.

[0041] Each receiving detector is encapsulated and accommodated in a corresponding TO package, and each TO package is adhesively fixed to the metal housing with optical glue.

[0042] In this embodiment, the first receiving detector 4 and the second receiving detector 5 arranged side by side with a small spacing are located on the same side of the main optical path, and the third receiving detector 6 is arranged on the other side of the main optical path. While reducing the length size of the device, the overall layout structure is compact and reasonable.

[0043] An insert end lens 7 is arranged between the wavelength division component and the fiber optic adapter 8.

[0044] Embodiment 1:

[0045] Such as Figure 1 And Figure 2As shown, a second filter 3 is also disposed obliquely on the main optical path between the first filter 2 and the fiber optic adapter 8. The light emitted from the fiber optic adapter 8 is reflected by the second filter 3 to the fifth wave plate 31, and is converted into an optical path perpendicular to the main optical path through the reflection of the fifth wave plate 31 and then exits to the third receiving detector 6.

[0046] A sixth wave plate 32 is disposed at the light incident end of the third receiving detector 6, and the sixth wave plate 32 is disposed parallel to the main optical path.

[0047] In this embodiment, the optical path of the transmitting end is as follows: The light emitted by the transmitting laser 11 is collimated into parallel light by the first lens 12, and then the three-way parallel light is combined into one-way parallel light by the light combining component 13, and then passes through the isolator 14, the first filter 2, the second filter 3, and the ferrule end lens 7 and converges to the fiber optic adapter 8.

[0048] In this embodiment, the optical path of the receiving end is as follows: The converging light emitted from the fiber optic adapter 8 is collimated into parallel light through the ferrule end lens 7, is reflected by the second filter 3 to the fifth wave plate 31, and then passes through the sixth wave plate 32 and is incident into the third receiving detector 6; the light passing through the second filter 3 is reflected by the first filter 2 to the first wave plate 21, and the light passing through the second wave plate 22 after being reflected by the first wave plate 21 is incident into the first receiving detector 4, and the light reflected by the first wave plate 21 and then reflected by the second wave plate 22 and the third wave plate 23 in sequence passes through the fourth wave plate 24 and is incident into the second receiving detector 5.

[0049] Embodiment 2:

[0050] As Figure 3 and Figure 4 shown, the third wave plate 23 is a band-pass filter. The optical path reflected by the second wave plate 22 to the third wave plate 23 is split at the third wave plate 23. One-way light passes through the third wave plate 23 and is incident into the third receiving detector 6, and the other-way light is reflected by the third wave plate 23 and is incident into the second receiving detector 5.

[0051] In this embodiment, the optical path of the transmitting end is as follows: The light emitted by the transmitting laser 11 is collimated into parallel light by the first lens 12, and then the three-way parallel light is combined into one-way parallel light by the light combining component 13, and then passes through the isolator 14, the first filter 2, and the ferrule end lens 7 and converges to the fiber optic adapter 8.

[0052] In this embodiment, the optical path of the receiving end is as follows: The converging light emitted from the fiber optic adapter 8 is collimated into parallel light through the ferrule end lens 7, is reflected by the first filter 2 to the first wave plate 21, and the light passing through the second wave plate 22 after being reflected by the first wave plate 21 is incident into the first receiving detector 4, and the light reflected by the first wave plate 21 and then reflected by the second wave plate 22 and passing through the third wave plate 23 is incident into the third receiving detector 6, and the light reflected by the third wave plate 23 passes through the fourth wave plate 24 and is incident into the second receiving detector 5.

[0053] Embodiment 3:

[0054] As Figure 5 and Figure 6 shown, the first wave plate 21 is a band-pass filter. The optical path reflected by the first filter 2 to the first wave plate 21 is split at the first wave plate 21. One path of light passes through the first wave plate 21 and then enters the third receiving detector 6, and the other path of light is reflected by the first wave plate 21 and then enters the second wave plate 22.

[0055] In this embodiment, the optical path sequence at the transmitting end is as follows: The light emitted by the transmitting laser 11 is collimated into parallel light by the first lens 12, and then the three paths of parallel light are combined into one path of parallel light by the light combining component 13, and then converge to the fiber optic adapter 8 through the isolator 14, the first filter 2, and the ferrule end lens 7.

[0056] In this embodiment, the optical path sequence at the receiving end is as follows: The converging light emitted from the fiber optic adapter 8 passes through the ferrule end lens 7 and is collimated into parallel light, is reflected by the first filter 2 to the first wave plate 21, the light passing through the first wave plate 21 enters the third receiving detector 6, the light reflected by the first wave plate 21 and passing through the second wave plate 22 enters the first receiving detector 4, the light reflected by the first wave plate 21 and the second wave plate 22 in sequence enters the third wave plate 23, and the light reflected by the third wave plate 23 and passing through the fourth wave plate 24 enters the second receiving detector 5.

[0057] In this embodiment, by combining the BOX housing 1 with the wave plates inside the metal housing, not only the device cost is effectively reduced, but also the optical port density is increased by 50%, the maximum rate is increased by 5 times, and the distance between the first receiving detector 4 and the second receiving detector 5 is compressed by more than 50%.

[0058] The present utility model greatly reduces the total length size of the optical device, is applicable to the application fields of 50G PON or other three-transmitter and three-receiver optical devices that require small-size spaces, and contributes to the marketization of the product.

[0059] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0060] The above description is an explanation of the present utility model, not a limitation of the utility model. The scope defined by the present utility model can be seen in the claims, and any form of modification can be made within the protection scope of the present utility model.

Claims

1. A single-fiber three-transmitter and three-receiver device with a BOX and a small-pitch TO hybrid package, comprising a wave splitter component, a light combining component (13) is arranged behind the wave splitter component, and a fiber adapter (8) is arranged in front of the wave splitter component. The combined light emitted by the light combining component (13) passes through the wave splitter component and then enters the fiber adapter (8), forming a main optical path; characterized in that: The wave splitting component comprises a first filter (2) tiltedly located on a main optical path, and two wave plates are arranged on both sides of the main optical path, including a wave plate 1 (21) and a wave plate 3 (23) located on one side of the main optical path, and a wave plate 2 (22) and a wave plate 4 (24) located on the other side of the main optical path; light emitted from the optical fiber adapter (8) is reflected to the wave plate 1 (21) via the first filter (2), and after being reflected by the wave plate 1 (21), a beam of light is emitted to the first receiving detector (4) through the wave plate 2 (22), and the other beam of light is reflected by the wave plate 1 (21), the wave plate 2 (22), and the wave plate 3 (23) in sequence, and then emitted to the second receiving detector (5) through the wave plate 4 (24); the first receiving detector (4) and the second receiving detector (5) are arranged adjacent to each other on the same side of the main optical path.

2. A single-fiber three-transmitter and three-receiver optical device with a hybrid BOX and small-pitch TO package as claimed in claim 1, characterized in that: The first filter (2) is arranged obliquely at an angle less than 45° relative to the main light path.

3. A single-fiber three-transmitter and three-receiver optical device with a hybrid BOX and small-pitch TO package as claimed in claim 2, characterized in that: The first filter (2) uses a wave plate with an inclination angle of 8° or a wave plate with an inclination angle of 13°. The 8° wave plate is used in application scenarios where the wavelength interval is less than 20 nm, and the 13° wave plate is used in application scenarios where the wavelength interval is 20 to 50 nm.

4. A single-fiber three-transmitter and three-receiver optical device with a hybrid BOX and small-pitch TO package as claimed in claim 1, characterized in that: The wave plate 2 (22) is a bandpass filter, and the light paths after being reflected by the wave plate 1 (21) and the wave plate 3 (23) are all emitted in a direction perpendicular to the main light path; the wave plate 1 (21), the wave plate 2 (22), and the wave plate 3 (23) are all arranged obliquely outside the main light path, and the wave plate 4 (24) is arranged outside in parallel with the main light path.

5. A single-fiber three-transmitter and three-receiver optical device with a BOX and small-pitch TO hybrid package as claimed in claim 1, characterized in that: A second filter (3) is also arranged obliquely on the main optical path between the first filter (2) and the optical fiber adapter (8); light emitted from the optical fiber adapter (8) is reflected by the second filter (3) to the wave plate five (31), and is transformed into a light path perpendicular to the main optical path by reflection from the wave plate five (31) and emitted to the third receiving detector (6).

6. A single-fiber three-transmitter and three-receiver optical device with a hybrid BOX and small-pitch TO package as claimed in claim 5, characterized in that: The light input end of the third receiving detector (6) is provided with a wave plate six (32), and the wave plate six (32) is arranged parallel to the main light path.

7. A single-fiber three-transmitter and three-receiver optical device with a mixed BOX and small-pitch TO package as claimed in claim 1, characterized in that: The wave plate three (23) is a bandpass filter. The light path reflected from the wave plate two (22) to the wave plate three (23) is split at the wave plate three (23). One light path passes through the wave plate three (23) and is incident on the third receiving detector (6). The other light path is reflected from the wave plate three (23) and is incident on the second receiving detector (5).

8. A single-fiber three-transmitter and three-receiver optical device with a mixed BOX and small-pitch TO package as claimed in claim 1, characterized in that: The wave plate 1 (21) is a bandpass filter. The light path reflected from the first filter (2) to the wave plate 1 (21) is split at the wave plate 1 (21). One light path passes through the wave plate 1 (21) and is incident on the third receiving detector (6). The other light path is reflected from the wave plate 1 (21) and is incident on the wave plate 2 (22).

9. A single-fiber three-transmitter and three-receiver optical device with a mixed BOX and small-pitch TO package as claimed in claim 1, characterized in that: The invention also comprises a BOX shell (1), wherein a light combining component (13) is located in the BOX shell (1), and three groups of emitting lasers (11) are arranged and packaged in an orderly manner in the BOX shell (1) located on one side of the light combining component (13); the light emitted by the three groups of emitting lasers (11) is combined into a collimated light beam through the light combining component (13), and a window for the collimated light beam to be emitted is provided on the BOX shell (1); lenses (12) are uniformly arranged between the individual emitting lasers (11) and the light combining component (13), and an isolator (14) is arranged between the light outlet of the light combining component (13) and the window of the BOX shell (1).

10. A single-fiber three-transmitter and three-receiver optical device with a hybrid BOX and small-pitch TO package as claimed in claim 1, characterized in that: The wave splitting component is accommodated in a metal shell, and the BOX shell (1) and the optical fiber adapter (8) are assembled at opposite ends of the metal shell by laser welding; each receiving detector package is accommodated in a corresponding TO package, and each TO package is fixed to the metal shell by optical adhesive bonding; a core end lens (7) is arranged between the wave splitting component and the optical fiber adapter (8).

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