Three-transmitting and three-receiving single-fiber optical device applied to 50G COMBO PON OLT

Abstract

The utility model provides a three-transmitting and three-receiving single-fiber optical device applied to a 50G COMBO PON OLT, which comprises a packaging shell, at least three laser chips, a wave combining assembly, a light splitting device, a first receiving end, a second receiving end and a third receiving end, the at least three laser chips are arranged in the packaging shell, the wave combining assembly and the light splitting device are both arranged in the packaging shell, and the first receiving end and the second receiving end are arranged in the packaging shell. The wave combining assembly is used for respectively receiving optical signals emitted by the at least three laser chips, combining the optical signals and coupling the optical signals to the light splitting device; the first receiving end, the second receiving end and the third receiving end are respectively arranged on the outer side of the packaging shell, and the light splitting device is used for splitting the combined optical signals and respectively coupling the split optical signals to different receiving ends; through the above structure, the plurality of laser chips are packaged in the same packaging shell, and the plurality of receiving ends are independently packaged outside the packaging shell, so that the problems of electric crosstalk and optical crosstalk are relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical communication technical field especially, it relates to a kind of three launch three receive single fiber optical device applied to 50G COMBO PON OLT. BACKGROUND

[0002] In the design of the prior art for packaging 50G PON Combo OLT three-mode optical device, it usually includes coaxial packaging and box packaging two methods. Among them, PON refers to Passive Optical Network (PON for short: PON), and OLT refers to Optical Line Terminal (OLT for short: OLT).

[0003] Among them, coaxial packaging is to independently package three laser chips and three receiving ends, and at least two downlink wavelength laser chips need to be temperature controlled and cooled to ensure performance, and separate coaxial packaging leads to the need for separate temperature control devices for different laser chips, which in turn leads to the need for additional space and additional power for temperature control devices, increasing the difficulty and risk of structural design, and the entire packaging structure occupies a large space and has low integration.

[0004] Among them, box packaging is to package three laser chips and three receiving ends into the same box. Although this design has higher integration, different laser chips can share a temperature control device for temperature adjustment, but due to the close distance between the three receiving ends and insufficient isolation, a certain degree of optical crosstalk and electrical crosstalk will occur.

[0005] Therefore, overcoming the defects of the prior art is an urgent problem to be solved in the technical field. UTILITY MODEL CONTENT

[0006] The problem to be solved by the utility model is how to reduce the influence of optical crosstalk and electrical crosstalk between different receiving ends while considering the integration of 50G PON Combo OLT three-mode optical device during packaging.

[0007] In the first aspect, a three-launch three-receive single fiber optical device applied to 50G COMBO PON OLT is provided, comprising: a packaging shell 1, at least three laser chips 2, a wave combining assembly 3, a light splitting device 4, a temperature control module 6, a first receiving end 51, a second receiving end 52 and a third receiving end 53, wherein:

[0008] The at least three laser chips 2 and the temperature control module 6 are arranged in the packaging shell 1, and the at least three laser chips 2 are arranged on the temperature control module 6.

[0009] The combining assembly 3 and the light splitting device 4 are arranged in the packaging shell 1, the light receiving side of the combining assembly 3 is opposite to the at least three laser chips 2, the light emitting side of the combining assembly 3 is opposite to the light splitting device 4, the combining assembly 3 is used for receiving and combining the light signals emitted by the at least three laser chips 2 respectively, and the combined light signals are emitted to the outside through the light splitting device 4.

[0010] The first receiving end 51, the second receiving end 52 and the third receiving end 53 are arranged on the outside of the packaging shell 1 and are in communication with the light splitting device 4 in the packaging shell 1, and the light splitting device 4 is used for splitting the received light signals from the outside and coupling the split light signals to the first receiving end 51, the second receiving end 52 and the third receiving end 53 respectively.

[0011] Preferably, the light splitting device 4 is provided with a light receiving channel 41, a first light emitting channel 42, a second light emitting channel 43, a third light emitting channel 44, a first light splitting part 45, a second light splitting part 46, a connecting channel 48 and a fourth light emitting channel 47, wherein:

[0012] The light receiving channel 41, the connecting channel 48 and the fourth light emitting channel 47 are in communication with each other through the light splitting parts to form a main channel;

[0013] The first light emitting channel 42 and the second light emitting channel 43 are arranged on both sides of the main channel and are in communication with the main channel through the first light splitting part 45 respectively, the fourth light emitting channel 47 is arranged on the same side as the first light emitting channel 42 and is in communication with the main channel through the second light splitting part 46;

[0014] The combined light signals of the combining assembly 3 are sequentially emitted to the outside through the light receiving channel 41, the first light splitting part 45, the connecting channel 48, the second light splitting part 46 and the fourth light emitting channel 47;

[0015] The second light splitting part 46 is used for splitting the received light signals from the outside, transmitting the split light signals to the third receiving end 53 through the third light emitting channel 44, and transmitting the split light signals to the first light splitting part 45 through the connecting channel 48; the first light splitting part 45 is used for splitting the light signals from the second light splitting part 46, transmitting the split light signals to the first receiving end 51 through the first light emitting channel 42, and transmitting the split light signals to the second receiving end 52 through the second light emitting channel 43.

[0016] Preferably, the first light splitting part 45 comprises a first slot 451, a first filter 452 and a second filter 453, wherein:

[0017] The first slot 451 is connected with the outer wall of the light splitting device 4 through the light inlet channel 41, the first slot 451 is connected with the first light outlet channel 42, the first slot 451 is connected with the second light outlet channel 43, and the first slot 451 is connected with the second light splitting part 46 through the connecting channel 48;

[0018] The second filter 453 is arranged on the inner wall of the first slot 451, the second filter 453 is used for transmitting the optical signal from the first filter 452 into the second light splitting part 46, and the second filter 453 is also used for reflecting the optical signal from the second light splitting part 46 to the second light outlet channel 43 and being received by the second receiving end 52;

[0019] The first filter 452 is arranged on the inner wall of the first slot 451, the first filter 452 is used for transmitting the optical signal from the light combination assembly 3 to the second filter 453, and the first filter 452 is also used for reflecting the optical signal from the second filter 453 to the first light outlet channel 42 and being received by the first receiving end 51.

[0020] Preferably, the first filter 452 is at 45±1 degrees relative to the optical signal from the light combination assembly 3, and the second filter 453 is at 45±1 degrees relative to the optical signal from the light combination assembly 3.

[0021] Preferably, the second light splitting part 46 comprises a second slot 461, a third filter 462 and a fourth filter 463, wherein:

[0022] The second slot 461 is connected with the first slot 451 through the connecting channel 48, and the second slot 461 is connected with the third receiving end 53 through the third light outlet channel 44.

[0023] The third filter 462 is arranged on the inner wall of the second slot 461, and the fourth filter 463 is arranged on the inner wall of the second slot 461; the third filter 462 is used for transmitting the optical signal from the second filter 453, the third filter 462 is also used for receiving the optical signal from the fourth light outlet channel 47 and reflecting the optical signal to the fourth filter 463, and the fourth filter 463 is used for reflecting the optical signal from the third filter 462 to the third light outlet channel 44 and being received by the third receiving end 53.

[0024] Preferably, the third filter 462 is at 13±1 degrees relative to the optical signal from the light combination assembly 3, and the fourth filter 463 is at 32±1 degrees relative to the optical signal from the light combination assembly 3.

[0025] Preferably, a collimating pin 7 is arranged on the side wall of the packaging shell 1, and the collimating pin 7 is connected with the second slot 461 through a fourth light outlet channel 47.

[0026] Preferably, at least three light inlet ends 31 are arranged on the combiner assembly 3, and the at least three light inlet ends 31 are arranged one by one corresponding to the at least three laser chips 2.

[0027] The light inlet end 31 is used for receiving the light signal emitted by the corresponding laser chip 2.

[0028] Preferably, a collimating lens 8 is arranged between each laser chip 2 and the corresponding light inlet end 31.

[0029] Preferably, an isolator 9 is arranged between each collimating lens 8 and the corresponding light inlet end 31.

[0030] The utility model provides a kind of three-transmitting three-receiving single fiber optical device applied to 50G COMBO PON OLT, comprising: packaging shell 1, at least three laser chips 2, combiner assembly 3, optical splitter 4, first receiving end 51, second receiving end 52 and third receiving end 53, at least three laser chips 2 are arranged in packaging shell 1, combiner assembly 3 and optical splitter 4 are arranged in packaging shell 1, combiner assembly 3 is used to receive the light signal emitted by at least three laser chips 2 respectively and carry out combiner and coupling to optical splitter 4;First receiving end 51, second receiving end 52 and third receiving end 53 are arranged on the outside of packaging shell 1 respectively, and optical splitter 4 is used to split the light signal after combiner, and the light signal after splitting is coupled into different receiving ends respectively;By above structure, multiple laser chips 2 are packaged in the same packaging shell 1, while multiple receiving ends are packaged separately outside packaging shell 1, and the problems of electrical crosstalk and optical crosstalk are alleviated.At least three laser chips 2 share the same temperature control module 6, and device is saved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0032] Figure 1 It is a structure schematic view of the three-transmitting three-receiving single fiber optical device applied to 50G COMBO PON OLT provided in the embodiments of the utility model;

[0033] Figure 2 A cross-sectional view after part structure of a three-transmission three-reception single fiber optical device applied to the 50G COMBO PON OLT is hidden for the embodiment of the utility model;

[0034] Figure 3 A structure schematic view of another three-transmission three-reception single fiber optical device applied to the 50G COMBO PON OLT is provided for the embodiment of the utility model;

[0035] Figure 4 A cross-sectional view after part structure of another three-transmission three-reception single fiber optical device applied to the 50G COMBO PON OLT is hidden for the embodiment of the utility model;

[0036] Figure 5 A structure schematic view of still another three-transmission three-reception single fiber optical device applied to the 50G COMBO PON OLT is provided for the embodiment of the utility model;

[0037] Figure 6 A top view of the three-transmission three-reception single fiber optical device applied to the 50G COMBO PON OLT is provided for the embodiment of the utility model;

[0038] Among them, the figure number is as follows:

[0039] The package shell 1, the golden finger 11, the laser chip 2, the wave combining assembly 3, the light inlet end 31, the light splitting device 4, the light inlet channel 41, the first light outlet channel 42, the second light outlet channel 43, the third light outlet channel 44, the first light splitting part 45, the first slot 451, the first filter 452, the second filter 453, the second light splitting part 46, the second slot 461, the third filter 462, the fourth filter 463, the fourth light outlet channel 47, the connecting channel 48, the first receiving end 51, the second receiving end 52, the third receiving end 53, the temperature control module 6, the collimating pin 7, the collimating lens 8, the isolator 9. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the utility model more clearly and intelligibly, the utility model is further explained in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0041] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0042] In the description of the utility model, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "multiple" is two or more. In addition, for example, in the description, the same type of nouns can also be described as two independent individuals by adding "A" and "B" at the end, in which case the features limited by "A" and "B" are only for the purpose of distinguishing the description of the same type of individuals, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0043] In describing some embodiments, "coupled", "coupling" and "connected" and their derivatives can be used. For example, the term "connected" can be used to describe some embodiments to indicate that two or more components have direct physical or electrical contact with each other. For another example, the term "coupling" can be used to describe some embodiments to indicate that two or more components have direct physical or electrical contact. However, the term "connected" or "coupled" can also refer to two or more components that do not have direct contact with each other, but still cooperate or interact with each other, such as "optical coupling", "wireless connection" and the like. The embodiments disclosed herein are not necessarily limited to the content of the utility model.

[0044] In the description of the utility model, the expression "A and / or B" in which A and B represent specific feature content in the form will be used, and the corresponding expression includes the following three combinations: only A, only B, and the combination of A and B.

[0045] In the utility model, "about", "approximately" or "approximately" includes the value described and the average value within the acceptable deviation range of the specific value, wherein the acceptable deviation range is determined by the person skilled in the art considering the measurement being discussed and the error related to the measurement of the specific quantity, i.e. the limitation of the measurement system.

[0046] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0047] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] Example 1:

[0049] This embodiment provides a three-transmit, three-receive single-fiber optical device for use in a 50G COMBO PON OLT, such as... Figure 1 As shown, it includes: a package housing 1, at least three laser chips 2, a beam combiner 3, a beam splitter 4, a temperature control module 6, a first receiver 51, a second receiver 52, and a third receiver 53, wherein:

[0050] The at least three laser chips 2 and the temperature control module 6 are all disposed inside the packaging shell 1, and the at least three laser chips 2 are disposed on the temperature control module 6.

[0051] In the embodiment, the packaging shell 1 is the shell of the whole optical device, which is used to protect the internal components of the optical device; the packaging shell 1 is provided with a circuit board, the at least three laser chips 2 and the temperature control module 6 are electrically connected to the circuit board, one end of the circuit board is a gold finger 11, the gold finger 11 is used to connect with external devices, so that the external devices can control the laser chips 2 and the temperature control module 6 through the gold finger 11; and since the laser chips 2 are arranged near the gold finger 11, the wire bonding distance of high-speed performance is ensured. The models of the at least three laser chips 2 can be 50G EML COC, 10G EML COC and 2.5G DML COC, wherein EML refers to an electro-absorption modulated laser (Electro-Absorption Modulated Laser, abbreviated as: EML), DML refers to a semiconductor laser (Directly Modulated Laser, abbreviated as: DML), and COC refers to a chip carrier package (Chip on Carrier, abbreviated as: COC). The three types of laser chips 2 are arranged in the same packaging shell, which improves the integration, avoids the need for separate packaging of the three laser chips 2, and further avoids the need for separate temperature control devices for the independently packaged lasers, thereby reducing the complexity of the whole structure and the cost. The above structure design enables the subsequent three laser chips 2 to share the same temperature control module 6 for temperature control and heat dissipation, which reduces the cost and reduces the difficulty and risk of structure design related to heat dissipation.

[0052] As shown in Figure 1 The combining assembly 3 and the light splitting device 4 are arranged in the packaging shell 1, the light entrance side of the combining assembly 3 is opposite to the at least three laser chips 2, the light exit side of the combining assembly 3 is opposite to the light splitting device 4, the combining assembly 3 is used to receive and combine the light signals emitted by the at least three laser chips 2, and the combined light signals are emitted to the outside through the light splitting device 4.

[0053] In the embodiment, the combining assembly 3 is used to combine the light signals emitted by the three laser chips 2. The combining assembly 3 is provided with at least three light entrance ends 31, which are arranged one by one corresponding to the at least three laser chips 2; the light entrance end 31 is used to receive the light signals emitted by the corresponding laser chip 2, the combining assembly 3 is used to receive and combine the light signals emitted by the three laser chips 2, and the light exit side of the combining assembly 3 is provided with at least one port for emitting the combined light signals.

[0054] Since the light signals emitted by the laser chips 2 need to be collimated and filtered before being combined, a collimating lens 8 is arranged between each laser chip 2 and the corresponding light inlet end 31, and an isolator 9 is arranged between each collimating lens 8 and the corresponding light inlet end 31. In this embodiment, the light splitting device 4 can be arranged as a separate device inside the packaging shell 1, or can be integrally formed with the packaging shell 1.

[0055] As shown in Figure 1 The first receiving end 51, the second receiving end 52, and the third receiving end 53 are arranged on the outside of the packaging shell 1 and are in communication with the light splitting device 4 inside the packaging shell 1. The light splitting device 4 is used to split the received light signals from the outside and couple the split light signals into the first receiving end 51, the second receiving end 52, and the third receiving end 53, respectively.

[0056] In this embodiment, the device is a transceiver, and the light splitting device 4 is internally provided with a plurality of optical filters. Each optical filter is used to transmit the light signals combined by the combining assembly 3 and emit them to the outside, and is also used to transmit and reflect the light signals incident from the outside, so as to split the light signals and emit them in different directions, thereby corresponding to different receiving ends and realizing the coupling packaging of different optical paths. The first receiving end 51, the second receiving end 52, and the third receiving end 53 are coaxially packaged and arranged on the outside of the packaging shell, so as to avoid the optical crosstalk and electrical crosstalk between the first receiving end 51, the second receiving end 52, and the third receiving end 53, thereby avoiding the influence on the photoelectric performance. In this embodiment, the first receiving end 51 and the third receiving end 53 can be arranged at the same side of the packaging shell 1, and the second receiving end 52 can be arranged at the other side of the packaging shell 1. The first receiving end 51 can be a 2.5G 1310nm wavelength avalanche photodiode (APD), and a continuous TIA is arranged inside the first receiving end 51 to realize signal amplification and conversion. The second receiving end 52 can be a 10G 1270nm wavelength APD, and a continuous TIA is arranged inside the second receiving end 52 to realize signal amplification and conversion. The third receiving end 53 can be a 25G 1286nm wavelength APD, and a continuous TIA is arranged inside the second receiving end 52 to realize signal amplification and conversion.

[0057] Compared with the existing box packaging form, in the embodiment, since the three receiving ends are all arranged outside the packaging shell 1, the three receiving ends themselves can realize electrical connection with external devices, without using the gold fingers 11 inside the packaging shell 1 to realize electrical connection with external devices, thereby avoiding the problems of complex internal circuit design and excessive electrical crosstalk.

[0058] Further, since the first receiving end 51, the second receiving end 52 and the third receiving end 53 are arranged at different positions of the side surface of the packaging shell 1 respectively, the light splitting device 4 needs to be designed correspondingly according to the positions of the receiving ends to split the optical signals and lead them to different receiving end positions, and therefore the embodiment involves the following design for the light splitting device 4:

[0059] As shown in Figure 2 and Figure 3 , wherein, Figure 2 is a sectional view of the device after some components are hidden, for showing the internal structure, the light splitting device 4 is provided with an incident light channel 41, a first light outlet channel 42, a second light outlet channel 43, a third light outlet channel 44, a first light splitting part 45, a second light splitting part 46, a connecting channel 48 and a fourth light outlet channel 47, wherein:

[0060] The incident light channel 41, the connecting channel 48 and the fourth light outlet channel 47 are connected to each other through the light splitting parts to form a main channel; the first light outlet channel 42 and the second light outlet channel 43 are arranged on both sides of the main channel and are connected to the main channel through the first light splitting part 45 respectively, the fourth light outlet channel 47 is arranged on the same side as the first light outlet channel 42 and is connected to the main channel through the second light splitting part 46.

[0061] One end of the incident light channel 41 is open to the side wall of the light splitting device 4 and opposite to the light outlet end of the light combining assembly 3, and the other end of the incident light channel 41 is open to the first light splitting part 45.

[0062] One end of the first light outlet channel 42 is open to the first receiving end 51, and the other end of the first light outlet channel 42 is open to the first light splitting part 45.

[0063] One end of the second light outlet channel 43 is open to the second receiving end 52, and the other end of the second light outlet channel 43 is open to the first light splitting part 45.

[0064] The first light splitting part 45 and the second light splitting part 46 are connected to each other through the connecting channel 48.

[0065] One end of the third light outlet channel 44 is open to the third receiving end 53, and the other end of the third light outlet channel 44 is open to the second light splitting part 46.

[0066] The fourth light exit channel 47 is connected to the second light splitting part 46 at one end and is connected to the outer wall of the package shell 1 at the other end, and is in communication with the outside.

[0067] The combined light signal of the combining assembly 3 is sequentially transmitted to the light entrance channel 41, the first light splitting part 45, the connecting channel 48, the second light splitting part 46, and the fourth light exit channel 47, and is emitted to the outside.

[0068] The light signal received from the outside is incident on the second light splitting part 46 through the fourth light exit channel 47. The second light splitting part 46 is used to split the light signal received from the outside, and the split light signal is transmitted to the third receiving end 53 through the third light exit channel 44 and is transmitted to the first light splitting part 45 through the connecting channel 48. The first light splitting part 45 is used to split the light signal from the second light splitting part 46, and the split light signal is transmitted to the first receiving end 51 through the first light exit channel 42 and is transmitted to the second receiving end 52 through the second light exit channel 43.

[0069] Further, the first light splitting part 45 needs to realize light splitting and transmit the light signal to the first receiving end 51, the second receiving end 52, and the second light splitting part 46 respectively, so the embodiment also relates to the following design:

[0070] As shown in Figures 4-6 The first light splitting part 45 includes a first slot 451, a first filter 452, and a second filter 453.

[0071] The first slot 451 is connected to the outer wall of the light splitting device 4 through the light entrance channel 41, is connected to the first light exit channel 42, is connected to the second light exit channel 43, and is connected to the second light splitting part 46 through the connecting channel 48.

[0072] The second filter 453 is arranged on the inner wall of the first slot 451, and is used to transmit the light signal from the first filter 452 to the second light splitting part 46. The second filter 453 is also used to reflect the light signal from the second light splitting part 46 to the second light exit channel 43 and be received by the second receiving end 52.

[0073] The first filter 452 is arranged on the inner wall of the first slot 451, and is used to transmit the light signal from the combining assembly 3 to the second filter 453. The first filter 452 is also used to reflect the light signal from the second filter 453 to the first light exit channel 42 and be received by the first receiving end 51.

[0074] wherein, Figure 6 The dotted line in the first and second light splitting parts 45 and 46 is a light signal path diagram of the light signal incident from the outside after being split by the first and second light splitting parts 45 and 46, and the arrow on the dotted line is the transmission direction of the light signal.

[0075] wherein, with the light signal emitted by the combining assembly 3 as a reference, the first filter 452 is at 45±1 degrees relative to the light signal from the combining assembly 3, and the second filter 453 is at 45±1 degrees relative to the light signal from the combining assembly 3.

[0076] Further, the second light splitting part 46 needs to split light and transmit the light signal to the third receiving end 53, so the embodiment also relates to the following design:

[0077] As shown in Figure 4 and Figure 5 The second light splitting part 46 comprises a second slot 461, a third filter 462 and a fourth filter 463, wherein:

[0078] The second slot 461 penetrates the upper and lower ends of the light splitting device 4, and the second slot 461 is connected to the first slot 451 through the connecting channel 48, and the second slot 461 is connected to the third receiving end 53 through the third light outlet channel 44.

[0079] The third filter 462 is arranged on the inner side wall of the second slot 461 and located at the position where the connecting channel 48 extends to the inner side wall of the second slot 461, and the fourth filter 463 is arranged on the inner side wall of the second slot 461; the third filter 462 is used for transmitting the light signal from the second filter 453 to the fourth light outlet channel 47 and transmitting to the outside, and the third filter 462 is also used for receiving the light signal from the fourth light outlet channel 47 and reflecting the light signal to the fourth filter 463, and the fourth filter 463 is used for reflecting the light signal from the third filter 462 to the third light outlet channel 44 and being received by the third receiving end 53.

[0080] wherein, with the light signal emitted by the combining assembly 3 as a reference, the third filter 462 is at 13±1 degrees relative to the light signal from the combining assembly 3, and the fourth filter 463 is at 32±1 degrees relative to the light signal from the combining assembly 3.

[0081] Further, as shown in Figure 4 and Figure 5As shown, the package shell 1 is further provided with a collimating pin 7 on the side wall, which is communicated with the second slot 461 through a fourth light exit channel 47. In this embodiment, the collimating pin 7 is coaxially arranged with the light signal emitted by the light splitting assembly. The third filter 462 is further used for transmitting the light signal from the second filter 453 to the fourth light exit channel 47 and receiving by the collimating pin 7.

[0082] It should be noted that the collimating pin 7 is further integrated with a non-spherical lens for collimation, which is located at the position of the fourth light exit channel 47 and used for collimating the light signal incident to the collimating pin 7. The collimation difference is used for realizing light path convergence.

[0083] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-transmitting and three-receiving single-fiber optical device applied to a 50G COMBO PON OLT, characterized in that, The application relates to a package structure of a laser module, which comprises a package shell (1), at least three laser chips (2), a beam combining assembly (3), a light splitting device (4), a temperature control module (6), a first receiving end (51), a second receiving end (52) and a third receiving end (53), wherein: the at least three laser chips (2) and the temperature control module (6) are arranged in the package shell (1), and the at least three laser chips (2) are arranged on the temperature control module (6); the beam combining assembly (3) and the light splitting device (4) are arranged in the package shell (1), the light entrance side of the beam combining assembly (3) is opposite to the at least three laser chips (2), the light exit side of the beam combining assembly (3) is opposite to the light splitting device (4), the beam combining assembly (3) is used for receiving and combining the light signals emitted by the at least three laser chips (2) respectively, and the light signals after being combined are emitted to the outside through the light splitting device (4); the first receiving end (51), the second receiving end (52) and the third receiving end (53) are arranged on the outside of the package shell (1) and are in communication with the light splitting device (4) in the package shell (1), and the light splitting device (4) is used for splitting the received light signals from the outside and coupling the split light signals into the first receiving end (51), the second receiving end (52) and the third receiving end (53) respectively. The light splitting device (4) is provided with a light entrance channel (41), a first light exit channel (42), a second light exit channel (43), a third light exit channel (44), a first light splitting part (45), a second light splitting part (46), a connecting channel (48) and a fourth light exit channel (47), wherein: the light entrance channel (41), the connecting channel (48) and the fourth light exit channel (47) are in communication with each other through the light splitting parts to form a main channel; the first light exit channel (42) and the second light exit channel (43) are arranged on the two sides of the main channel and are in communication with the main channel through the first light splitting part (45) and the second light splitting part (46) respectively; the fourth light exit channel (47) is arranged on the same side as the first light exit channel (42) and is in communication with the main channel through the second light splitting part (46); the light signals after being combined by the beam combining assembly (3) are sequentially emitted to the outside through the light entrance channel (41), the first light splitting part (45), the connecting channel (48), the second light splitting part (46) and the fourth light exit channel (47); the second light splitting part (46) is used for splitting the received light signals from the outside, transmitting the split light signals to the third receiving end (53) through the third light exit channel (44) and transmitting the split light signals to the first light splitting part (45) through the connecting channel (48); the first light splitting part (45) is used for splitting the light signals from the second light splitting part (46), transmitting the split light signals to the first receiving end (51) through the first light exit channel (42) and transmitting the split light signals to the second receiving end (52) through the second light exit channel (43). ​ ​ ​ 2. The three-transmit three-receive single-fiber optical device for 50G COMBO PON OLT of claim 1, wherein, ​ ​ ​ ​ ​ 3. The three transmit and three receive single fiber optical device applied to the 50G COMBO PON OLT of claim 2, wherein, The first light splitting part (45) comprises a first slot (451), a first filter (452) and a second filter (453), wherein: The first slot (451) is connected with the outer wall of the light splitting device (4) through the light inlet channel (41), the first slot (451) is connected with the first light outlet channel (42), the first slot (451) is connected with the second light outlet channel (43), and the first slot (451) is connected with the second light splitting part (46) through the connecting channel (48); The second filter (453) is arranged on the inner wall of the first slot (451), the second filter (453) is used for transmitting the optical signal from the first filter (452) into the second light splitting part (46), and the second filter (453) is also used for reflecting the optical signal from the second light splitting part (46) to the second light outlet channel (43) and being received by the second receiving end (52); The first filter (452) is arranged on the inner wall of the first slot (451), the first filter (452) is used for transmitting the optical signal from the wave combining assembly (3) to the second filter (453), and the first filter (452) is also used for reflecting the optical signal from the second filter (453) to the first light outlet channel (42) and being received by the first receiving end (51).

4. The three-transmit three-receive single-fiber optical device for 50G COMBO PON OLT of claim 3, wherein, The first filter (452) is at 45±1 degrees relative to the optical signal from the wave combining assembly (3), and the second filter (453) is at 45±1 degrees relative to the optical signal from the wave combining assembly (3).

5. The three transmit and three receive single fiber optical device applied to the 50G COMBO PON OLT of claim 3, wherein, The second light splitting part (46) comprises a second slot (461), a third filter (462) and a fourth filter (463), wherein: The second slot (461) is connected with the first slot (451) through the connecting channel (48), and the second slot (461) is connected with the third receiving end (53) through the third light outlet channel (44); The third filter (462) is arranged on the inner wall of the second slot (461), and the fourth filter (463) is arranged on the inner wall of the second slot (461); the third filter (462) is used for transmitting the optical signal from the second filter (453), the third filter (462) is also used for receiving the optical signal from the fourth light outlet channel (47) and reflecting the optical signal to the fourth filter (463), and the fourth filter (463) is used for reflecting the optical signal from the third filter (462) to the third light outlet channel (44) and being received by the third receiving end (53).

6. The three transmit and three receive single fiber optical device applied to the 50G COMBO PON OLT according to claim 5, wherein, The third filter (462) is at 13±1 degrees relative to the optical signal from the wave combining assembly (3), and the fourth filter (463) is at 32±1 degrees relative to the optical signal from the wave combining assembly (3).

7. The three transmit and three receive single fiber optical device applied to the 50G COMBO PON OLT of claim 5, wherein, The packaging shell (1) is further provided with a collimating pin (7) on the side wall, which is communicated with the second slot (461) through a fourth light outlet channel (47).

8. The three transmit and three receive single fiber optical device for 50G COMBO PON OLT of claim 1, wherein, The wave combining assembly (3) is provided with at least three light inlet ends (31), which are arranged one by one with the at least three laser chips (2). The light inlet end (31) is used for receiving the light signal emitted by the corresponding laser chip (2).

9. The three transmit and three receive single fiber optical device applied to the 50G COMBO PON OLT according to claim 8, wherein, The collimating lens (8) is arranged between each laser chip (2) and the corresponding light inlet end (31).

10. The three transmit and three receive single fiber optical device for 50G COMBO PON OLT of claim 9, wherein, The isolator (9) is arranged between each collimating lens (8) and the corresponding light inlet end (31).

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