Three-transmitting and three-receiving optical device

Abstract

The utility model provides a three-transmitting and three-receiving optical device, 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, a third receiving end and a lens group, and is characterized in that the at least three laser chips, the lens group, the wave combining assembly and the light splitting device are all 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] This utility model relates to the field of optical communication technology, and in particular to a three-transmitter, three-receiver optical device. Background Technology

[0002] Existing technologies for packaging three-transmitter, three-receiver optical devices typically include two methods: coaxial packaging and box packaging.

[0003] Coaxial packaging involves packaging three laser chips and three receivers independently. Since each laser chip is usually packaged together with a lens, the lens cannot be adjusted in position according to the actual situation, resulting in low optical path coupling efficiency.

[0004] Box packaging encapsulates three laser chips and three receivers into the same box. While this design offers higher integration, the close proximity and insufficient isolation between the three receivers can lead to optical and electrical crosstalk.

[0005] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0006] The problem this invention aims to solve is how to improve the optical path coupling efficiency of a three-transmitter, three-receiver optical device during packaging, while reducing the impact of optical crosstalk and electrical crosstalk between different receivers.

[0007] In a first aspect, a three-transmitter, three-receiver optical device is provided, comprising: a package housing 1, at least three laser chips 2, a beam combiner 3, a beam splitter 4, a first receiver 51, a second receiver 52, a third receiver 53, and a lens group 10, wherein:

[0008] The at least three laser chips 2, the lens group 10, the beam combiner 3, and the beam splitter 4 are all disposed within the package housing 1. The light-incident side of the beam combiner 3 is opposite to the at least three laser chips 2, and the light-exit side of the beam combiner 3 is opposite to the beam splitter 4. The lens group 10 is located between the at least three laser chips 2 and the light-incident side of the beam combiner 3. The beam combiner 3 is used to receive and combine the emitted light from the at least three laser chips 2, and then emit the combined emitted light to the outside after passing through the beam splitter 4.

[0009] The first receiving end 51, the second receiving end 52 and the third receiving end 53 are respectively disposed on the outside of the packaging shell 1, and are all connected to the beam splitting device 4 inside the packaging shell 1. The beam splitting device 4 is used to split the incident light received from the outside, and couple the split incident light to the first receiving end 51, the second receiving end 52 and the third receiving end 53 respectively.

[0010] Preferably, the wave combiner assembly 3 includes: a first filter 31, a second filter 32, a third filter 33, and a first rhomboid prism 34, wherein:

[0011] The first filter 31, the second filter 32, the third filter 33 and the first rhomboid prism 34 are all disposed inside the encapsulation housing 1;

[0012] The first filter 31, the second filter 32 and the third filter 33 are respectively configured to correspond one-to-one with at least three laser chips 2, and the first rhomboid prism 34 is configured opposite to the first filter 31.

[0013] The third filter 33 is used to reflect the emitted light from the corresponding laser chip 2 to the second filter 32 and transmit it through the second filter 32 to the first filter 31; the second filter 32 is used to reflect the emitted light from the corresponding laser chip 2 to the first filter 31; the first filter 31 is used to transmit the emitted light from the corresponding laser chip 2 to the first rhomboid prism 34, and the first filter 31 is also used to reflect the optical signal from the second filter 32 and the third filter 33 to the first rhomboid prism 34;

[0014] The upper end face of the first rhombic prism 34 is used to reflect the outgoing light from the first filter 31 to the lower end face of the first rhombic prism 34, and the lower end face of the first rhombic prism 34 reflects the outgoing light from the upper end face of the first rhombic prism 34 to the beam splitter 4.

[0015] Preferably, the beam-splitting device 4 includes: a beam-splitting substrate 41 and a second oblique prism 42, wherein:

[0016] The beam-splitting substrate 41 and the second rhomboid prism 42 are sequentially disposed inside the packaging shell 1 along the path of the emitted light emitted by the first rhomboid prism 34.

[0017] The light emitted from the first rhombic prism 34 is refracted to the outside by the second rhombic prism 42 after passing through the beam splitting substrate 41.

[0018] The second rhomboid prism 42 is also used to receive incident light from the outside and refract the incident light to the beam splitting substrate 41. The beam splitting substrate 41 is used to split the incident light from the second rhomboid prism 42 and couple the split incident light to the first receiving end 51, the second receiving end 52 and the third receiving end 53 respectively.

[0019] Preferably, the beam-splitting substrate 41 includes a substrate base 411, a parallel block 412, a first filter 413, a second filter 414, a third filter 415, a fourth filter 416, and a fifth filter 417, wherein:

[0020] The substrate base 411 is disposed inside the packaging shell 1, and the parallel block 412, the first filter 413, the second filter 414, the third filter 415, the fourth filter 416 and the fifth filter 417 are all disposed on the substrate base 411.

[0021] The first filter 413 is used to receive the outgoing light from the first rhomboid prism 34 and refract it to the parallel block 412. After passing through the parallel block 412, the outgoing light is received by the second rhomboid prism 42 and refracted to the outside by the second rhomboid prism 42.

[0022] The parallel block 412 is also used to receive incident light from the second rhomboid prism 42, and the incident light is received by the first filter 413 after passing through the parallel block 412.

[0023] The first filter 413 reflects the incident light to the second filter 414; the second filter 414 transmits the incident light to the third filter 415, and the third filter 415 reflects the incident light from the second filter 414 to the third receiver 53; the second filter 414 also reflects the incident light to the fourth filter 416.

[0024] The fourth filter 416 transmits the incident light from the second filter 414 to the fifth filter 417, and the fifth filter 417 reflects the incident light from the fourth filter 416 to the first receiving end 51; the fourth filter 416 also reflects the incident light from the second filter 414 to the third filter 415, and the third filter 415 reflects the incident light from the fourth filter 416 to the second receiving end 52.

[0025] Preferably, the beam-splitting substrate 41 further includes: a sixth filter 418 and a seventh filter 419, wherein:

[0026] The sixth filter 418 and the seventh filter 419 are both disposed on the substrate base 411;

[0027] The sixth filter 418 is located in the optical path between the fifth filter 417 and the first receiving end 51. The sixth filter 418 is used to transmit incident light of the first preset wavelength band to the first receiving end 51.

[0028] The seventh filter 419 is located in the optical path between the third filter 415 and the second receiver 52, and the seventh filter 419 is used to transmit incident light of the second preset wavelength band to the second receiver 52.

[0029] Preferably, a light emission channel is provided on the side wall of the encapsulation shell 1. The light emission channel is disposed opposite to the second rhomboid prism 42. The light emission channel is used to transmit the emitted light from the second rhomboid prism 42 to the outside. The light emission channel is also used to transmit the incident light from the outside to the second rhomboid prism 42.

[0030] Preferably, a collimation pin 7 is also provided on the side wall of the packaging shell 1, and the collimation pin 7 is connected to the light emission channel.

[0031] Preferably, a first lens 6 is provided in the light output channel.

[0032] Preferably, an isolator 8 is also provided between the beam combiner 3 and the beam splitter 4.

[0033] Preferably, a heat dissipation module 9 is also provided inside the encapsulation shell 1, and the at least three laser chips 2 are all disposed on the heat dissipation module 9.

[0034] This invention provides a three-transmitter, three-receiver optical device, comprising: a package housing 1, at least three laser chips 2, a multiplexing assembly 3, a beam splitter 4, a first receiver 51, a second receiver 52, a third receiver 53, and a lens group 10. The at least three laser chips 2, the lens group 10, the multiplexing assembly 3, and the beam splitter 4 are all disposed within the package housing 1. The multiplexing assembly 3 receives and combines the optical signals emitted by the at least three laser chips 2, and couples them to the beam splitter 4. The first receiver 51, the second receiver 52, and the third receiver 53 are respectively disposed on the outside of the package housing 1. The beam splitter 4 splits the combined optical signals and couples the split optical signals to different receivers. Through this structure, multiple laser chips 2 are packaged within the same package housing 1, while multiple receivers are individually packaged outside the package housing 1, thus mitigating electrical and optical crosstalk problems. Furthermore, the outer casing 1 is equipped with a lens group 10, and by adjusting the position of the lens group 10 relative to the laser chip 2, the optical path coupling efficiency is further improved. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a three-transmitter, three-receiver optical device provided in an embodiment of this utility model;

[0037] Figure 2 A schematic diagram of another three-transmitter, three-receiver optical device structure provided in this embodiment of the present invention;

[0038] Figure 3 A top view of a three-transmitter, three-receiver optical device provided for an embodiment of this utility model;

[0039] Figure 4 A top view of another three-transmitter, three-receiver optical device provided in an embodiment of this utility model;

[0040] Figure 5 A schematic diagram of the structure of another three-transmitter, three-receiver optical device provided in this embodiment of the present invention;

[0041] Figure 6 A cross-sectional view of a three-transmitter, three-receiver optical device provided for an embodiment of this utility model;

[0042] The attached figures are numbered as follows:

[0043] 1. Encapsulation housing; 2. Laser chip; 3. Wave multiplexing assembly; 31. First filter; 32. Second filter; 33. Third filter; 34. First rhombic prism; 4. Beam splitter; 41. Beam splitting substrate; 411. Substrate base; 412. Parallel block; 413. First filter; 414. Second filter; 415. Fourth filter; 416. Fifth filter; 417. Sixth filter; 418. Seventh filter; 419. Second rhombic prism; 42. Light output channel; 51. First receiver; 52. Second receiver; 53. Third receiver; 6. First lens; 7. Collimation pin; 8. Isolator; 9. Heat dissipation module; 10. Lens group. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0046] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0047] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may 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" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0048] In the description of this utility model, "A and / or B" will be used to represent specific features. The corresponding expressions include the following three combinations: only A, only B, and a combination of A and B.

[0049] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the specified value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the specified quantity, i.e., the limitations of the measurement system.

[0050] 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.

[0051] 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.

[0052] Example 1:

[0053] This embodiment provides a three-transmit, three-receive optical device, 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 first receiver 51, a second receiver 52, a third receiver 53, and a lens group 10, wherein:

[0054] The at least three laser chips 2, the lens group 10, the beam combiner 3, and the beam splitter 4 are all disposed within the package housing 1. The light-incident side of the beam combiner 3 is opposite to the at least three laser chips 2, and the light-exit side of the beam combiner 3 is opposite to the beam splitter 4. The lens group 10 is located between the at least three laser chips 2 and the light-incident side of the beam combiner 3. The beam combiner 3 is used to receive and combine the emitted light from the at least three laser chips 2, and then emit the combined emitted light to the outside after passing through the beam splitter 4.

[0055] In this embodiment, since the three laser chips 2 are integrated and packaged inside the same package housing 1, and are not individually coaxially packaged, and the lens group 10 inside the package housing 1 is not packaged together with the laser chip 2, the position of the lens group 10 inside the package housing 1 can be adjusted to perform optical path coupling. Compared with the existing coaxial packaging, the optical path coupling efficiency can be significantly improved.

[0056] The first receiving end 51, the second receiving end 52 and the third receiving end 53 are respectively disposed on the outside of the packaging shell 1, and are all connected to the beam splitting device 4 inside the packaging shell 1. The beam splitting device 4 is used to split the incident light received from the outside, and couple the split incident light to the first receiving end 51, the second receiving end 52 and the third receiving end 53 respectively.

[0057] In this embodiment, the beam combiner 3 is used to combine the optical signals emitted by the three laser chips 2. The beam combiner 3 corresponds to the at least three laser chips 2 respectively, and receives, combines and emits the optical signals emitted by the three laser chips 2 to the beam splitter 4.

[0058] like Figure 1 As shown, a heat dissipation module 9 is also provided inside the packaging shell 1, and the at least three laser chips 2 are all disposed on the heat dissipation module 9.

[0059] In this embodiment, the encapsulation shell 1 serves as the outer casing of the entire optical device, protecting its internal components. A circuit board is housed within the encapsulation shell 1, and the at least three laser chips 2 and the heat dissipation module 9 are electrically connected to it. One end of the circuit board is a gold finger, which connects to external devices, allowing these devices to control the laser chips 2 and the heat dissipation module 9. Furthermore, the laser chips 2 are positioned near the gold finger, ensuring a high-speed wire bonding distance. The three laser chips 2 are all housed within the same encapsulation shell 1, improving integration and avoiding the need for separate encapsulations for each chip. This also avoids the need for independent temperature control devices for each individually encapsulated laser, which would increase overall structural complexity and cost. This structural design allows the three laser chips 2 to share the same heat dissipation module 9 for temperature control and heat dissipation, reducing costs and mitigating the difficulty and risks associated with heat dissipation-related structural design.

[0060] In this embodiment, the device is a transceiver. The beam splitter 4 is internally equipped with multiple filters. Some of these filters transmit a specified wavelength of light signal from the output light after beam combining by the beam combiner 3 and emit it to the outside. On the other hand, the filters transmit and reflect a specified wavelength of light signal from the incident light from the outside, thereby splitting the specified wavelength of light signal and emitting it to different receiving ends, achieving coupling and encapsulation of different optical paths. The first receiving end 51, the second receiving end 52, and the third receiving end 53 are all coaxially packaged and located outside the encapsulation shell 1. This avoids optical crosstalk and electrical crosstalk between the first receiving end 51, the second receiving end 52, and the third receiving end 53, thus preventing any impact on photoelectric performance. Simultaneously, it effectively isolates the receiving end and the transmitting end in the entire device, reducing the influence of the transmitting end's signal on the receiving end's signal. In this embodiment, the first receiving end 51 and the third receiving end 53 can be located on the same side of the encapsulation shell 1, while the second receiving end 52 can be located on the other side of the encapsulation shell 1.

[0061] Compared to existing box packaging, in this embodiment, since all three receivers are located outside the packaging shell 1, the three receivers can achieve electrical connection with external devices on their own, without the need to use gold fingers inside the packaging shell 1 to achieve electrical connection with external devices, thus avoiding the problems of complex internal circuit design and excessive electrical crosstalk.

[0062] Furthermore, in this embodiment, the beam combiner 3 needs to combine the emitted light from the three laser chips 2 into a single optical signal. Therefore, the beam combiner 3 involves the following structural design to achieve the above-mentioned effect:

[0063] like Figure 2 As shown, the multiplexing assembly 3 includes: a first filter 31, a second filter 32, a third filter 33, and a first rhomboid prism 34, wherein:

[0064] The first filter 31, the second filter 32, the third filter 33 and the first rhomboid prism 34 are all disposed inside the encapsulation housing 1.

[0065] The first filter 31, the second filter 32 and the third filter 33 are respectively configured to correspond one-to-one with at least three laser chips 2, and the first rhomboid prism 34 is configured opposite to the first filter 31.

[0066] The third filter 33 is used to reflect the emitted light from the corresponding laser chip 2 to the second filter 32 and transmit it through the second filter 32 to the first filter 31; the second filter 32 is used to reflect the emitted light from the corresponding laser chip 2 to the first filter 31; the first filter 31 is used to transmit the emitted light from the corresponding laser chip 2 to the first rhomboid prism 34, and the first filter 31 is also used to reflect the emitted light from the second filter 32 and the third filter 33 to the first rhomboid prism 34.

[0067] like Figure 2 and Figure 4 As shown, the upper end face of the first rhomboid prism 34 is used to reflect the outgoing light from the first filter 31 to the lower end face of the first rhomboid prism 34, and the lower end face of the first rhomboid prism 34 reflects the outgoing light from the upper end face of the first rhomboid prism 34 to the beam splitter 4.

[0068] In this embodiment, the transmitted and reflected outgoing light on the first filter 31 are combined into a single outgoing light beam. The first rhomboid prism 34 is used to shift the optical path of the combined outgoing light so as to transmit the combined outgoing light to the beam splitter 4.

[0069] Furthermore, since the first receiving end 51, the second receiving end 52, and the third receiving end 53 are respectively located at different positions on the side of the packaging shell 1, the beam splitter 4 needs to be designed accordingly for the location of each receiving end in order to split the optical signal and direct it to different receiving end positions. Therefore, this embodiment involves the following design for the beam splitter 4:

[0070] like Figure 2 As shown, the beam-splitting device 4 includes: a beam-splitting substrate 41 and a second rhomboid prism 42, wherein:

[0071] The beam-splitting substrate 41 and the second rhomboid prism 42 are sequentially disposed inside the packaging shell 1 along the path of the emitted light emitted by the first rhomboid prism 34.

[0072] The light emitted from the first rhomboid prism 34 is refracted to the outside by the second rhomboid prism 42 after passing through the beam splitter substrate 41.

[0073] The second rhomboid prism 42 is also used to receive incident light from the outside and refract the incident light to the beam splitting substrate 41. The beam splitting substrate 41 is used to split the incident light from the second rhomboid prism 42 and couple the split incident light to the first receiving end 51, the second receiving end 52 and the third receiving end 53 respectively.

[0074] Furthermore, the beam-splitting substrate 41 needs to split the light and transmit the optical signals to the first receiving end 51, the second receiving end 52, and the third receiving end 53 respectively. Therefore, this embodiment of the beam-splitting substrate 41 also involves the following design:

[0075] like Figure 3 and Figure 4 As shown, the beam-splitting substrate 41 includes a substrate base 411, a parallel block 412, a first filter 413, a second filter 414, a third filter 415, a fourth filter 416, and a fifth filter 417, wherein:

[0076] The substrate base 411 is disposed inside the packaging shell 1, and the parallel block 412, the first filter 413, the second filter 414, the third filter 415, the fourth filter 416 and the fifth filter 417 are all disposed on the substrate base 411.

[0077] It should be noted that in this embodiment, the first filter 413 and the fourth filter 416 are both located on the side of the parallel block 412 facing the first rhomboid prism 34, while the second filter 414 is located on the side of the parallel block 412 facing away from the first rhomboid prism 34. The parallel block 412 can be made of glass.

[0078] The first filter 413 is used to receive the outgoing light from the first rhomboid prism 34 and refract it to the parallel block 412. After passing through the parallel block 412, the outgoing light is received by the second rhomboid prism 42 and refracted to the outside by the second rhomboid prism 42.

[0079] The parallel block 412 is also used to receive incident light from the second rhomboid prism 42, and the incident light is received by the first filter 413 after passing through the parallel block 412.

[0080] The first filter 413 reflects the incident light to the second filter 414; the second filter 414 transmits the incident light to the third filter 415, and the third filter 415 reflects the incident light from the second filter 414 to the third receiver 53; the second filter 414 also reflects the incident light to the fourth filter 416.

[0081] The fourth filter 416 transmits the incident light from the second filter 414 to the fifth filter 417, and the fifth filter 417 reflects the incident light from the fourth filter 416 to the first receiving end 51; the fourth filter 416 also reflects the incident light from the second filter 414 to the third filter 415, and the third filter 415 reflects the incident light from the fourth filter 416 to the second receiving end 52.

[0082] The beam-splitting substrate 41 further includes a sixth filter 418 and a seventh filter 419, wherein: the sixth filter 418 and the seventh filter 419 are both disposed on the substrate base 411; the sixth filter 418 is located in the optical path between the fifth filter 417 and the first receiving end 51, and the sixth filter 418 is used to transmit incident light of a first preset wavelength band to the first receiving end 51; the seventh filter 419 is located in the optical path between the third filter 415 and the second receiving end 52, and the seventh filter 419 is used to transmit incident light of a second preset wavelength band to the second receiving end 52.

[0083] in, Figure 4 The dashed lines in the diagram represent the optical signal path after the incident light signal passes through the first filter 413, the second filter 414, the third filter 415, the fourth filter 416, the fifth filter 417, the sixth filter 418, and the seventh filter 419. The arrows on the dashed lines indicate the direction of optical signal transmission.

[0084] It should be noted that in this embodiment, the first filter 413, the second filter 414, the third filter 415, the fourth filter 416, the fifth filter 417, the sixth filter 418, and the seventh filter 419 are respectively used to transmit and / or reflect optical signals of a specified wavelength band, so as to achieve the effect of transmitting optical signals of a specified wavelength band to the corresponding receiving end. This embodiment uses the following example as an example to more clearly illustrate the optical signal transmission path of the device in this embodiment, as follows:

[0085] The optical signals emitted by the three laser chips 2 have a wavelength range of 1340nm to 1580nm, and the center wavelengths of the emitted light from the three laser chips 2 can be 1342nm, 1490nm, and 1577nm, respectively. The first receiver 51 receives the optical signal with a center wavelength of 1310nm, the second receiver 52 receives the optical signal with a center wavelength of 1270nm, and the third receiver 53 receives the optical signal with a center wavelength of 1286nm. The combined beam of optical signals with center wavelengths of 1270nm, 1286nm, and 1310nm is incident into the device from the outside.

[0086] The first filter 413 is used to transmit light signals with a wavelength range of 1340nm to 1580nm, so that the light signals emitted from the three laser chips 2 are directly transmitted to the second rhomboid prism 42; the first filter 413 is also used to reflect light signals with a wavelength range of 1260nm to 1330nm to the second filter 414, so that all light signals of all wavelengths from the outside are reflected to the second filter 414, and incident light from the outside is prevented from being transmitted to the side of the multiplexing component 3 as much as possible.

[0087] The second filter 414 is used to transmit optical signals in the 1286nm±2nm band and reflect optical signals in the 1260nm to 1280nm and 1290 to 1580nm bands, thereby separating the optical signal corresponding to the third receiver 53 from the incident light in the combined beam. At the same time, the incident angle of the incident light on the second filter 414 can be 8°±3°.

[0088] The fourth filter 416 is used to transmit optical signals in the 1310nm±20nm band and reflect optical signals in the 1260nm to 1290nm and 1340nm to 1580nm bands, so as to separate the optical signal corresponding to the first receiver 51 from the incident light in the combined beam. At the same time, the incident light is incident on the fourth filter 416 at an angle of 37°±3°.

[0089] The third filter 415 includes two reflective surfaces. One reflective surface is used to reflect light signals in the 1286nm±2nm band to reflect the light signals transmitted through the second filter 414 to the third receiving end 53. The incident angle of the incident light corresponding to this reflective surface is 37°±3°. The other reflective surface is used to reflect light signals in the 1270nm±10nm band to reflect the light signals reflected by the fourth filter 416 to the second receiving end 52. The incident angle of the incident light corresponding to this reflective surface is 51.4°±3°. The two reflective surfaces are arranged adjacent to each other and perpendicular to each other.

[0090] The fifth filter 417 is used to reflect optical signals in the 1310nm±20nm band, so as to reflect the optical signals transmitted through the fourth filter 416 to the first receiving end 51, and the incident angle of the incident light on the fifth filter 417 is 45°±3°.

[0091] The sixth filter 418 is used to transmit optical signals in the 1310nm±20nm band and reflect light in the 1260nm to 1290nm and 1340nm to 1580nm bands, so as to ensure that the optical signals in the 1310nm±20nm band are transmitted to the first receiving end 51, while avoiding the transmission of optical signals in other bands in the combined incident light to the first receiving end 51. At the same time, the incident angle of the incident light on the sixth filter 418 is 0°±3°.

[0092] The seventh filter 419 is used to transmit optical signals in the 1270nm±10nm band and reflect optical signals in the 1290nm to 1580nm band, so as to ensure that the optical signals in the 1270nm±10nm band are transmitted to the second receiving end 52, while avoiding the transmission of optical signals of other bands in the combined incident light to the second receiving end 52. At the same time, the incident angle of the incident light on the sixth filter 418 is 0°±3°.

[0093] It is worth mentioning that, in this embodiment, the third receiving end 53 is internally integrated with a corresponding filter for optical signals in the 1286nm±2nm band, and reflects optical signals in the 1260nm to 1280nm and 1290 to 1580nm bands, so that the optical signals in the 1286nm±2nm band are transmitted to the third receiving end 53, while preventing optical signals in other bands in the incident beam from being transmitted to the third receiving end 53.

[0094] Furthermore, such as Figure 5 As shown, a collimation pin 7 is also provided on the side wall of the packaging shell 1, and the collimation pin 7 is connected to the inner side of the packaging shell 1 through the light emission channel.

[0095] The collimation pin 7 is used to transmit the outgoing light refracted from the second rhomboid prism 42. In this embodiment, the collimation pin 7 is coaxially arranged with the outgoing light refracted from the second rhomboid prism 42.

[0096] It is important to note that, such as Figure 5 and Figure 6 As shown, a first lens 6 is provided in the light output channel. The first lens 6 can be an aspherical lens, used to collimate the light signal incident on the collimation pin 7. The collimation difference is used to achieve optical path convergence.

[0097] Furthermore, to prevent incident light from the outside from entering the device and, after being split by the beam splitter 4, still having some light signal transmitted to the laser chip 2 side of the package 1, thus affecting the laser chip 2, this embodiment also involves the following design:

[0098] like Figure 5 and Figure 6 As shown, an isolator 8 is also provided between the beam combiner 3 and the beam splitter 4. The isolator 8 isolates the incident light at the beam splitter 4, preventing the incident light from transmitting to the laser chip 2 and interfering with it.

[0099] Furthermore, a second lens is provided between the third receiving end 53 and the beam splitter 4. The second lens is used to collimate the optical signal of the corresponding wavelength band split from the beam splitter 4. Correspondingly, the first receiving end 51 and the second receiving end 52 both integrate corresponding lenses, which are also used to collimate the optical signal of the corresponding wavelength band.

[0100] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-transmitter, three-receiver optical device, characterized in that, include: The package includes a housing (1), at least three laser chips (2), a beam combiner (3), a beam splitter (4), a first receiver (51), a second receiver (52), a third receiver (53), and a lens group (10), wherein: The at least three laser chips (2), the lens group (10), the beam combiner (3), and the beam splitter (4) are all disposed inside the package housing (1). The light-incident side of the beam combiner (3) is opposite to the at least three laser chips (2), and the light-outcident side of the beam combiner (3) is opposite to the beam splitter (4). The lens group (10) is located between the light-incident side of the at least three laser chips (2) and the beam combiner (3). The beam combiner (3) is used to receive and combine the emitted light from the at least three laser chips (2), and then emit the combined emitted light to the outside after passing through the beam splitter (4). The first receiving end (51), the second receiving end (52) and the third receiving end (53) are respectively disposed on the outside of the encapsulation shell (1) and are all connected to the beam splitting device (4) inside the encapsulation shell (1). The beam splitting device (4) is used to split the incident light received from the outside and couple the split incident light to the first receiving end (51), the second receiving end (52) and the third receiving end (53) respectively.

2. The three-transmitter, three-receiver optical device according to claim 1, characterized in that, The wave combiner assembly (3) includes: a first filter (31), a second filter (32), a third filter (33), and a first rhomboid prism (34), wherein: The first filter (31), the second filter (32), the third filter (33) and the first rhomboid prism (34) are all disposed inside the encapsulation shell (1); The first filter (31), the second filter (32) and the third filter (33) are respectively arranged in a one-to-one correspondence with at least three laser chips (2), and the first rhomboid prism (34) is arranged opposite to the first filter (31); The third filter (33) is used to reflect the emitted light from the corresponding laser chip (2) to the second filter (32) and transmit it through the second filter (32) to the first filter (31); the second filter (32) is used to reflect the emitted light from the corresponding laser chip (2) to the first filter (31); the first filter (31) is used to transmit the emitted light from the corresponding laser chip (2) to the first rhomboid prism (34), and the first filter (31) is also used to reflect the light signal from the second filter (32) and the third filter (33) to the first rhomboid prism (34); The upper end face of the first rhombic prism (34) is used to reflect the outgoing light from the first filter (31) to the lower end face of the first rhombic prism (34), and the lower end face of the first rhombic prism (34) reflects the outgoing light from the upper end face of the first rhombic prism (34) to the beam splitter (4).

3. The three-transmitter, three-receiver optical device according to claim 2, characterized in that, The beam splitter (4) includes: a beam splitting substrate (41) and a second oblique prism (42), wherein: The beam splitting substrate (41) and the second rhomboid prism (42) are sequentially disposed inside the encapsulation shell (1) along the path of the emitted light emitted by the first rhomboid prism (34); The light emitted from the first rhomboid prism (34) is refracted to the outside by the second rhomboid prism (42) after passing through the beam splitting substrate (41); The second rhombic prism (42) is also used to receive incident light from the outside and refract the incident light to the beam splitting substrate (41). The beam splitting substrate (41) is used to split the incident light from the second rhombic prism (42) and couple the split incident light to the first receiving end (51), the second receiving end (52) and the third receiving end (53) respectively.

4. The three-transmitter, three-receiver optical device according to claim 3, characterized in that, The beam-splitting substrate (41) includes a substrate base (411), a parallel block (412), a first filter (413), a second filter (414), a third filter (415), a fourth filter (416), and a fifth filter (417), wherein: The substrate base (411) is disposed inside the packaging shell (1), and the parallel block (412), the first filter (413), the second filter (414), the third filter (415), the fourth filter (416) and the fifth filter (417) are all disposed on the substrate base (411). The first filter (413) is used to receive the outgoing light from the first rhomboid prism (34) and refract it to the parallel block (412). After passing through the parallel block (412), the outgoing light is received by the second rhomboid prism (42) and refracted to the outside by the second rhomboid prism (42). The parallel block (412) is also used to receive incident light from the second rhomboid prism (42), and the incident light is received by the first filter (413) after passing through the parallel block (412). The first filter (413) reflects the incident light to the second filter (414); the second filter (414) transmits the incident light to the third filter (415), the third filter (415) reflects the incident light from the second filter (414) to the third receiver (53); the second filter (414) also reflects the incident light to the fourth filter (416); The fourth filter (416) transmits the incident light from the second filter (414) to the fifth filter (417), and the fifth filter (417) reflects the incident light from the fourth filter (416) to the first receiving end (51); the fourth filter (416) also reflects the incident light from the second filter (414) to the third filter (415), and the third filter (415) reflects the incident light from the fourth filter (416) to the second receiving end (52).

5. The three-transmitter, three-receiver optical device according to claim 4, characterized in that, The beam-splitting substrate (41) further includes: a sixth filter (418) and a seventh filter (419), wherein: The sixth filter (418) and the seventh filter (419) are both disposed on the substrate base (411); The sixth filter (418) is located in the optical path between the fifth filter (417) and the first receiving end (51). The sixth filter (418) is used to transmit incident light of the first preset wavelength band to the first receiving end (51). The seventh filter (419) is located in the optical path between the third filter (415) and the second receiver (52), and the seventh filter (419) is used to transmit incident light of the second preset wavelength band to the second receiver (52).

6. The three-transmitter, three-receiver optical device according to claim 3, characterized in that, The packaging shell (1) has a light emission channel on its side wall. The light emission channel is disposed opposite to the second rhomboid prism (42). The light emission channel is used to transmit the emitted light from the second rhomboid prism (42) to the outside. The light emission channel is also used to transmit the incident light from the outside to the second rhomboid prism (42).

7. The three-transmitter, three-receiver optical device according to claim 6, characterized in that, The packaging shell (1) is also provided with a collimation pin (7) on its side wall, and the collimation pin (7) is connected to the light output channel.

8. The three-transmitter, three-receiver optical device according to claim 6, characterized in that, A first lens (6) is provided in the light output channel.

9. The three-transmitter, three-receiver optical device according to claim 1, characterized in that, An isolator (8) is also provided between the beam combiner (3) and the beam splitter (4).

10. The three-transmitter, three-receiver optical device according to claim 1, characterized in that, The encapsulation shell (1) is also provided with a heat dissipation module (9), and the at least three laser chips (2) are all disposed on the heat dissipation module (9).

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