Optical transmitting assembly, optical transceiving assembly and optical communication device

Abstract

The utility model discloses an optical transmitting assembly, an optical transceiving assembly and an optical communication device, and belongs to the technical field of optical communication. The light emitting assembly comprises a shell, a light emitting unit and an isolator, the shell is provided with a light outlet, the light emitting unit and the isolator are located in the shell, the shell is located on a light path between the light emitting unit and the light outlet, and the clear aperture of the isolator is smaller than 0.6 mm. The transmitting assembly is low in cost.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to an optical transmitting component, an optical transceiver component and an optical communication device. Background Art

[0002] The Transmitter Optical Subassembly (TOSA) is one of the key components in an optical communication device, used to convert electrical signals into optical signals.

[0003] A related art light-emitting assembly includes a housing, a light-emitting unit, and an isolator. The housing has a receiving cavity and a sidewall with a light outlet. The light-emitting unit and the isolator are disposed within the cavity, with the isolator positioned in the optical path between the light-emitting unit and the light outlet.

[0004] However, the light-transmitting aperture of the isolator is relatively large, and the cost of the isolator is positively correlated with the light-transmitting aperture of the isolator. Therefore, the cost of the isolator is relatively high, resulting in a higher material cost of the optical transmission component. Utility Model Content

[0005] The present application provides an optical transmission component, an optical transceiver component and an optical communication device, which are helpful in reducing the cost of the optical transmission component.

[0006] In a first aspect, the present application provides a light emitting assembly. The light emitting assembly comprises: a housing, a light emitting unit, and an isolator. The housing has a light outlet. The light emitting unit and the isolator are located in the housing. The housing is located on the optical path between the light emitting unit and the light outlet. The isolator has a clear aperture of less than 0.6 mm.

[0007] In the present application, an isolator with a clear aperture smaller than 0.6 mm is used. By reducing the size of the clear aperture of the isolator, the material cost of the isolator is reduced, thereby reducing the cost of the light emitting assembly.

[0008] Optionally, the isolator has a clear aperture of 0.3 mm to 0.4 mm. A clear aperture that is too small will result in excessively high manufacturing costs for the isolator. An isolator with a clear aperture within this range can take into account both material costs and process costs.

[0009] Optionally, the light emitting unit comprises one or more lasers.

[0010] When the light-emitting unit includes a single laser, the light-emitting unit includes a first laser and a first microlens. The first microlens is located on the end face of the first laser and is used to shape a first light beam output by the first laser. Using the microlens located on the end face of the first laser to shape the first light beam has low production costs and good shaping effects on the laser spot.

[0011] Optionally, the spot size at the first microlens is 50 μm-200 μm. When the spot size at the first microlens is limited to this range, the difference between the clear aperture of the isolator and the spot size is large. Even if the light beam diverges during propagation, it can still pass through the isolator smoothly, with minimal impact on coupling efficiency (CE).

[0012] When the light-emitting unit includes two lasers, in addition to the first laser and the first microlens, the light-emitting unit also includes a second laser, a second microlens and a combiner. The second microlens is located on the end face of the second laser and is used to shape the second light beam output by the second laser. The combiner is used to combine the shaped first light beam output by the first microlens and the shaped second light beam output by the second microlens into a combined light beam, and output the combined light beam to the isolator. This optical transmission component can be applied to a two-generation-in-one optical module. A two-generation-in-one optical module refers to an optical module that is compatible with two optical network units (ONUs) of different generations. For example, the first laser is used to output a 50-gigabit passive optical network (50GPON) optical signal, and the second laser is used to output a 10-gigabit passive optical network (XGPON) optical signal.

[0013] Optionally, when the light-emitting unit includes three lasers, in addition to the first laser, the first microlens, the second laser and the second microlens, the light-emitting unit also includes a third laser and a third microlens. The third microlens is located on the end face of the third laser and is used to shape the third light beam output by the third laser. The combiner device is used to combine the shaped first light beam output by the first microlens, the shaped second light beam output by the second microlens and the shaped third light beam output by the third microlens into the combined light beam. This optical transmission component can be applied to a three-generation-in-one optical module. A three-generation-in-one optical module refers to an optical module that is compatible with three different generations of ONUs. For example, the first laser is used to output a 50G PON optical signal, the second laser is used to output an XGPON optical signal, and the third laser is used to output a GPON optical signal.

[0014] Optionally, the light output by the light emitting unit is parallel light, that is, the microlens corresponding to each laser converts the light beam emitted by the laser into parallel light to reduce the divergence of the light beam when passing through the isolator, so as to avoid light loss caused by the side wall of the magnetic ring of the isolator blocking the light.

[0015] Optionally, the light emitting assembly further comprises: a converging lens, located at the light outlet, for coupling the parallel light into the optical fiber. By providing the converging lens at the light outlet, the coupling efficiency between the light emitting unit and the optical fiber can be improved.

[0016] Optionally, the isolator is a Faraday isolator.

[0017] In a second aspect, an optical transceiver assembly is also provided, which includes an optical receiving assembly and any one of the aforementioned optical transmitting assemblies. The optical receiving assembly is located in the housing and is used to receive a light beam through the light outlet.

[0018] In a third aspect, an optical communication device is provided. The optical communication device includes a circuit board and any of the aforementioned optical transmitter components, the optical transmitter component being connected to the circuit board. Alternatively, the optical communication device includes a circuit board and the aforementioned optical transceiver component, the optical transceiver component being connected to the circuit board.

[0019] Optionally, the optical communication device is an optical module or an optical network device including an optical module, such as an optical line terminal (OLT), an ONU, a master device or a slave device in a fiber to the room (FTTR) network, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a light emitting assembly provided in an embodiment of the present application;

[0021] Figure 2 This is a schematic structural diagram of another optical transmission component provided in an embodiment of the present application;

[0022] Figure 3 This is a structural diagram of another optical transmission component provided in an embodiment of the present application;

[0023] Figure 4 This is a structural diagram of an optical transceiver assembly provided in an embodiment of the present application;

[0024] Figure 5 This is a structural diagram of another optical transceiver component provided in an embodiment of the present application.

[0025] Reference numerals

[0026] a. Optical fiber;

[0027] 10. Housing; 11. Light outlet;

[0028] 20, light-emitting unit; 21a, first laser; 22a, second laser; 23a, third laser; 21b, first microlens; 22b, second microlens; 23b, third microlens; 24a, first filter; 24b, second filter; 24c, combiner prism; 24d, third filter;

[0029] 30. Isolator;

[0030] 40. Converging lens;

[0031] 50. Optical receiving assembly; 51a. First receiver; 51b. Second receiver; 51c. Third receiver; 52a. First splitter; 52b. Second splitter; 52c. Third splitter; 52d, 52f. Reflectors; 52e. Fourth splitter; 53a, 53b. Housing. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure of a light emitting component provided in an embodiment of the present application. Figure 1 As shown, the optical emission assembly includes: a housing 10, a light-emitting unit 20, and an isolator 30. The housing has a light outlet 11. The light-emitting unit 20 and the isolator 30 are located in the housing 10, and the housing 10 is located on the optical path between the light-emitting unit 20 and the light outlet 11. The aperture of the isolator 30 is less than 0.6 mm.

[0034] In related art, the clear aperture of isolators used in optical transmitter assemblies is typically 0.6mm-0.8mm, which is a relatively large aperture. The material cost of an isolator is positively correlated with the size of its clear aperture. That is, the larger the isolator's clear aperture, the higher its material cost. Isolators account for a significant portion of the cost of an optical transmitter assembly. Therefore, a larger isolator's clear aperture results in higher material costs for the optical transmitter assembly.

[0035] In the embodiment of the present application, an isolator with a light-clearing aperture smaller than 0.6 mm is used. By reducing the size of the light-clearing aperture of the isolator, the material cost of the isolator is reduced, thereby reducing the cost of the light emitting assembly.

[0036] Exemplarily, the clear aperture of the isolator 30 is 0.3 mm to 0.4 mm, such as 0.3 mm, 0.35 mm, or 0.4 mm. A clear aperture that is too small will result in excessively high manufacturing costs for the isolator. An isolator with a clear aperture within this range can take into account both material costs and manufacturing costs.

[0037] Optionally, the isolator 30 is a Faraday isolator. The Faraday isolator includes a magnetic ring, a first polarizer (also known as a polarizer), a second polarizer (also known as an analyzer), and an optically active material (such as a magneto-optical crystal, etc.). The first polarizer, the optically active material, and the second polarizer are arranged in sequence in the magnetic ring along the propagation direction of the light beam. The direction of the absorption axis of the first polarizer and the direction of the absorption axis of the second polarizer form an angle of 45°. When the light beam is incident on the Faraday isolator from the first polarizer, the light beam forms a linearly polarized light with a first polarization direction after passing through the first polarized light, and the first polarization direction is perpendicular to the direction of the absorption axis of the first polarizer. After the linearly polarized light with the first polarization direction passes through the optically active material placed in the magnetic field provided by the magnetic ring, the polarization direction is rotated by 45°, obtaining a linearly polarized light with a second polarization direction, and the second polarization direction is perpendicular to the direction of the absorption axis of the second polarizer, so that it can be emitted through the second polarizer. When the light beam enters the Faraday isolator through the second polarizer, it undergoes the second polarization and becomes linearly polarized light with a second polarization direction. This linearly polarized light with the second polarization direction then passes through the optically active material placed in the magnetic field provided by the magnetic ring, where its polarization direction is rotated 45°, resulting in linearly polarized light with a third polarization direction. This third polarization direction is parallel to the first polarization direction, preventing it from exiting the first polarizer. In other words, the light beam traveling from the first polarizer to the second polarizer can pass through the isolator, while the light beam traveling from the second polarizer to the first polarizer cannot, thus preventing reverse transmission of light.

[0038] The clear aperture of a Faraday isolator is positively correlated with the size of the optically active material. A larger clear aperture requires a larger material. Furthermore, the larger the material, the higher its cost. Therefore, for a Faraday isolator, the larger the clear aperture, the higher its material cost. Furthermore, because optically active materials are brittle, they are prone to chipping and scratching during cutting. If the material is too small, the cutting precision required is high, and the process cost is high. By selecting a Faraday isolator with an appropriate clear aperture, the embodiments of the present application can effectively reduce costs and process costs.

[0039] Optionally, the light-emitting unit 20 includes a first laser 21a and a first microlens 21b. The first microlens 21b is located on the end face of the first laser 21a and is used to shape the first light beam output by the first laser 21a. Using the first microlens 21b located on the end face of the first laser 21a to shape the first light beam has low production costs and good shaping effects on the light spot of the first laser 21a.

[0040] Optionally, the first microlens 21b can be arranged on the end face of the first laser 21a in the following two ways: first, the first microlens 21b is manufactured and formed on the end face of the first laser 21a; second, the first microlens 21b is independently manufactured and formed, and then connected to the end face of the first laser 21a by bonding or other methods.

[0041] Optionally, the spot size at the first microlens 21b is 50μm-200μm. For example, the spot size at the first microlens 21b is 80μm-100μm. Here, the spot size refers to the spot diameter. Since the divergence angle of the light beam will increase during propagation, when the light beam output by the light-emitting unit 20 reaches the input end of the isolator, the spot size will increase. When the spot size at the first microlens 21b is limited to this range, the difference between the size of the clear aperture of the isolator 30 and the spot size is large. Even if the light beam diverges during propagation, it can pass through the isolator 30 smoothly, and the impact on CE is small.

[0042] It should be noted that in Figure 1 In the illustrated embodiment, a first microlens 21b is used to shape the first light beam. In other embodiments, the first microlens 21b can be replaced with a coupling lens spaced apart from the first laser 21a. For example, the coupling lens can be a cap lens, i.e., the first laser 21a is encapsulated in a tube housing having a window, and an aspheric lens is mounted in the window. Alternatively, the coupling lens can be an aspheric lens, etc.

[0043] When using a coupling lens, the positions of the first laser and the coupling lens must be calibrated through active coupling. Active coupling involves adjusting the position of the coupling lens relative to the laser while the laser is emitting light, so that the output light spot parameters meet the requirements. This active coupling step increases the manufacturing cost of the optical transmitter assembly. Therefore, using a first microlens directly on the end face of the first laser can also reduce the packaging difficulty of the optical transmitter assembly.

[0044] Optionally, the light output by the light emitting unit 20 is parallel light. That is, the microlens corresponding to each laser converts the light beam emitted by the laser into parallel light to reduce the divergence of the light beam during propagation.

[0045] Optionally, the optical transmission assembly further includes a converging lens 40. The converging lens 40 is located at the light outlet 11 and is configured to convert the parallel light output by the light emitting unit 20 into converging light and couple it to the optical fiber a. The provision of the converging lens 40 at the light outlet improves the coupling efficiency between the light emitting unit 20 and the optical fiber a.

[0046] In some examples, the converging lens 40 is fixedly connected to the housing 10. In other examples, the converging lens 40 is disposed on the end face of the optical fiber a (see Figure 3 ), that is, the converging lens 40 is integrated on the end face of the light a.

[0047] Because the propagation path of the first light beam output by the first laser 21a in the optical transmission assembly includes two lenses, namely the first microlens 21b and the converging lens 40, the optical path of the optical transmission assembly can be referred to as a dual-lens system. In other embodiments, the optical path of the optical transmission assembly can also adopt a single-lens system or a three-lens system, simply by adjusting the number of lenses, the positions of the lenses, and the functions of the lenses accordingly.

[0048] For example, in a single-lens system, only a first microlens is provided on the propagation path of the first light beam output by the first laser. The first microlens is used to first diffuse the first light beam and then converge the diffused first light beam to couple it into the optical fiber. For another example, in a three-lens system, a first microlens, an intermediate lens, and a converging lens are provided in sequence on the propagation path of the first light beam output by the first laser. The first microlens is used to converge the first light beam, the intermediate lens is used to convert the light beam received from the first lens into parallel light, and the converging lens is used to converge the received parallel light beam to couple it into the optical fiber.

[0049] Figure 2 This is a schematic diagram of the structure of a light emitting component provided in an embodiment of the present application. Figure 1 The embodiment shown is different in that the structure of the light emitting unit is different.

[0050] like Figure 2 As shown, the optical emission assembly includes: a housing 10, a light-emitting unit 20, and an isolator 30. The housing has a light outlet 11. The light-emitting unit 20 and the isolator 30 are located in the housing 10, and the housing 10 is located on the optical path between the light-emitting unit 20 and the light outlet 11. The aperture of the isolator 30 is less than 0.6 mm.

[0051] In addition to the aforementioned first laser 21a and first microlens 21b, the light-emitting unit 20 also includes a second laser 22a, a second microlens 22b, a third laser 23a, a third microlens 23b, and a combiner. The second microlens 22b is located on the end face of the second laser 22a and is used to shape the second light beam output by the second laser 22a. The third microlens 23b is located on the end face of the third laser 23a and is used to shape the third light beam output by the third laser 23a. The combiner is used to combine the shaped first light beam output by the first microlens 21b, the shaped second light beam output by the second microlens 22b, and the shaped third light beam output by the third microlens 23b into a combined light beam.

[0052] In this embodiment, the wavelengths of the first light beam, the second light beam, and the third light beam are different.

[0053] With the development of passive optical network (PON) systems, multiple ONUs will coexist in PON systems, each using optical signals with different wavelengths (or different protocols) to transmit data. For example, a PON system may simultaneously contain ONUs supporting the 50G PON protocol, ONUs supporting the XG(s)PON protocol, and ONUs supporting the GPON protocol. The optical transmission assembly needs to be able to cooperate with these ONUs to properly transmit data to them. In this case, the wavelengths of the first, second, and third light beams are different. Assuming that the first light beam is a 50G PON optical signal, the second light beam is an XG(s)PON optical signal, and the third light beam is a GPON optical signal, the wavelength of the first light beam is 1340nm-1344nm, the wavelength of the second light beam is 1575nm-1581nm, and the wavelength of the third light beam is 1480nm-1500nm.

[0054] Optionally, the combiner device includes a first filter 24a and a second filter 24b. The first filter 24a is used to transmit the shaped first light beam output by the first microlens 21b and reflect the shaped second light beam output by the second microlens 22b, thereby combining the shaped first light beam and the shaped second light beam into one beam. The second filter 24b is used to transmit a combined light beam of the shaped first light beam and the shaped second light beam and reflect the shaped third light beam output by the third microlens 23b, thereby combining the shaped first light beam, the shaped second light beam, and the shaped third light beam into one beam to obtain a combined light beam.

[0055] Here, the filter can also be called a reflector, or a semi-transparent and semi-reflective film.

[0056] In other examples, two of the first, second, and third light beams have the same wavelength. The lasers corresponding to the light beams with the same wavelength can be divided into primary and backup lasers to improve the reliability of the optical transmission assembly.

[0057] It should be noted that, in other embodiments, the light emitting assembly may include only two lasers. That is, in other embodiments, the light emitting assembly may be removed. Figure 2 The second laser and the second lens in, or, removing Figure 2 The third laser and the third lens in.

[0058] Figure 3 This is a schematic structural diagram of another optical emission component provided in an embodiment of the present application. Figure 3 The light emitting assembly shown is Figure 2 The difference between the optical transmission components shown is that the structure of the multiplexing device is different.

[0059] like Figure 3 As shown, the combining device includes a combining prism 24c and a third filter 24d. The combining prism 24c has two parallel reflective surfaces: one for reflecting the shaped first light beam output by the first microlens 21b, and the other for reflecting the shaped second light beam output by the second microlens 22b and transmitting the shaped first light beam. This ensures that the propagation paths of the shaped first light beam and the output shaped second light beam are identical, thereby combining the shaped first light beam and the shaped second light beam into one path. The third filter 24d is used to transmit the combined light beam of the first and second light beams and to reflect the shaped third light beam output by the third microlens 23b, thereby combining the shaped first light beam, the shaped second light beam, and the shaped third light beam into one path to produce a combined light beam.

[0060] By changing the structure of the combiner, the relative positions of the lasers can be adjusted to meet different design requirements. Figure 3In the illustrated embodiment, the first laser 21 a , the second laser 22 a , and the third laser 23 a are arranged on the same side of the housing 10 , and the arrangement direction is the same as the propagation direction of the combined light beam.

[0061] It should be noted that the light-transmitting prism in this embodiment can be replaced by two reflective plates, one of which is used to reflect the shaped first light beam output by the first microlens 21b, and the other is used to reflect the shaped second light beam output by the second microlens 22b and transmit the shaped first light beam.

[0062] In some examples, the aforementioned laser and corresponding microlens can be packaged in a single housing to form an integrated parallel beam laser. Because the microlens is disposed on the end face of the laser, the housing can be a flat window housing, i.e., a flat light-transmitting sheet is disposed at the light outlet of the housing.

[0063] In other examples, the laser and the corresponding microlens may not be pre-packaged, and the various devices may be packaged together only through the housing 10 .

[0064] An embodiment of the present application also provides an optical transceiver assembly, which includes an optical transmitting assembly and an optical receiving assembly.

[0065] Figure 4 This is a structural diagram of an optical transceiver assembly provided in an embodiment of the present application. Figure 4 China-Israel optical transceiver components include Figure 2 The light emitting component in the embodiment is used as an example for illustration. When implemented, the structure of the light emitting component adopts any of the aforementioned ones.

[0066] like Figure 4 As shown, the light receiving assembly 50 is located in the housing 10 and is used to receive a light beam through the light outlet 11 (as shown by the dotted arrow in the figure).

[0067] The light receiving assembly 50 includes a receiving unit and a light path control unit. The light path control unit is located in the optical path between the isolator 30 and the light outlet 11 and is used to transmit the light beam received by the light outlet 11 to the receiving unit. The receiving unit is used to receive the light beam output by the light path control unit and perform photoelectric conversion on it.

[0068] Exemplarily, the receiving unit includes a first receiver 51a, a second receiver 51b, and a third receiver 51c. The optical path control unit includes a first wave splitter 52a, a second wave splitter 52b, and a third wave splitter 52c. The first wave splitter 52a is used to split the light beam received by the light outlet 11 into a fourth light beam and a fifth light beam, and transmit the fourth light beam to the first receiver 51a. The first receiver 51a is used to perform photoelectric conversion on the fourth light beam. The second wave splitter 52b is used to reflect the fifth light beam and transmit the fifth light beam to the third wave splitter 52c. The third wave splitter 52c is used to split the fifth light beam into a sixth light beam and a seventh light beam. The second receiver 51b is used to perform photoelectric conversion on the sixth light beam, and the third receiver 51c is used to perform photoelectric conversion on the seventh light beam.

[0069] Exemplarily, the fourth light beam is an optical signal of a wavelength corresponding to 50G PON, the sixth light beam is an optical signal of a wavelength corresponding to XGPON, and the seventh light beam is an optical signal of a wavelength corresponding to GPON. The first receiver 51a is separately encapsulated in a tube shell 53a, and the second receiver 51b, the third receiver 51c, and the third splitter 52c are encapsulated in a tube shell 53b. That is, in this embodiment, the receivers for the optical signal of the wavelength corresponding to XGPON and the optical signal of the wavelength corresponding to GPON are integrated together. In other embodiments, the three receivers can also be separately encapsulated, or the receivers for the optical signal of the wavelength corresponding to XGPON and the optical signal of the wavelength corresponding to 50G PON can be integrated together. This embodiment of the present application is not limited to this.

[0070] Optionally, the optical path control unit 42 further includes one or more reflectors, and the position of the receiver can be adjusted by arranging the reflectors. Figure 4 In the embodiment, the optical path control unit includes a reflector 52d, which is used to reflect the seventh light beam output by the third splitter 52c to the third receiver 51c.

[0071] exist Figure 4 In the embodiment shown, the optical receiving assembly 50 is located between the isolator 30 and the light outlet 11, which is beneficial to reducing the size of the optical transceiver assembly in the direction perpendicular to the propagation direction of the mixed light beam, that is, reducing the size of the optical transceiver assembly in the direction perpendicular to the propagation direction of the mixed light beam. Figure 4 Dimensions in the top-bottom direction.

[0072] In the embodiment of the present application, the wave splitter may be a filter.

[0073] Figure 5 This is a structural diagram of another optical transceiver assembly provided in an embodiment of the present application. Figure 4 The difference between Zhongguang transceiver components is that, Figure 5 In the embodiment, the structure of the optical path control unit and the position of the receiving unit relative to the sending unit 20 are different.

[0074] The arrangement direction of the receiving unit and the transmitting unit 20 is perpendicular to the propagation direction of the mixed light beam from the isolator 30 to the light outlet 11 (for example, the left-right direction in the figure), so that the size of the optical transceiver assembly in this propagation direction can be reduced.

[0075] like Figure 5 As shown, in addition to the first wave splitter 52a, the second wave splitter 52b and the third wave splitter 52c, the optical path control unit also includes a fourth wave splitter 52e. The third wave splitter 52e is located between the isolator 30 and the light outlet 11, and is used to transmit the mixed light beam output by the isolator 30 and reflect the light beam received by the light outlet 11 so that the light beam reaches the first wave splitter 52a.

[0076] Optionally, the optical path control unit further includes a reflector 52f, which is located on the optical path between the fourth splitter 52e and the first splitter 52a, and is configured to reflect the light beam emitted by the fourth splitter 52e back to the first splitter 52a. In this way, the receivers can be arranged in a direction parallel to the propagation direction of the mixed light beam, thereby further reducing the size of the optical transceiver assembly in the propagation direction of the mixed light beam.

[0077] It should be noted that Figure 4 and Figure 5 In the embodiment, the optical path control unit may further include more reflectors, for example, a reflector is further provided between the reflector 52f and the fourth splitter 52e, or a reflector is arranged between the first splitter 52a and the first receiver 51a.

[0078] An embodiment of the present application further provides an optical communication device, which includes a circuit board and any of the aforementioned optical transmission components, wherein the optical transmission component is connected to the circuit board.

[0079] An embodiment of the present application further provides an optical communication device, which includes a circuit board and any one of the aforementioned optical transceiver components, wherein the optical transceiver component is connected to the circuit board.

[0080] In some examples, the optical communication device is an optical module. An optical module is a signal transmission device that can perform photoelectric and electro-optical conversion. It can convert electrical signals into optical signals before outputting them at the transmitting end, and can convert input optical signals into electrical signals at the receiving end.

[0081] In other examples, the optical communication device is an optical network device including an optical module, such as an OLT, an ONU, a master device (also known as a master gateway, etc.) or a slave device (also known as a slave gateway, etc.) in an FTTR network.

[0082] The optical transmitting assembly, optical transceiver assembly and optical communication device provided in the embodiments of the present application can be applied to a variety of optical networks, including but not limited to optical transport network (OTN), optical access network (OAN), metropolitan area network (MAN), synchronous digital hierarchy (SDH), passive optical network (PON), Ethernet, or flexible Ethernet (FlexE), wavelength division multiplexing (WDM) network, etc., any one or more combinations thereof.

[0083] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meaning understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprising" mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. The multiple involved in the embodiments of this application refers to two or more. A and / or B means that there are three situations: A; B; and A and B.

[0084] The above is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A light emitting component, characterized in that: The light emitting assembly comprises: a housing, a light emitting unit and an isolator, wherein the housing has a light outlet. The light emitting unit and the isolator are located in the housing, and the housing is located on the optical path from the light emitting unit to the light outlet. The light aperture of the isolator is less than 0.6 mm.

2. The light emitting assembly according to claim 1, wherein: The light aperture of the isolator is 0.3mm-0.4mm.

3. The optical transmission assembly according to claim 1 or 2, characterized in that: The light emitting unit includes a first laser and a first microlens. The first microlens is located on the end face of the first laser and is used to shape a first light beam output by the first laser.

4. The light emitting assembly according to claim 3, wherein: The spot size of the first microlens is 80 μm-100 μm.

5. The light emitting assembly according to claim 3, wherein: The light emitting unit further includes a second laser, a second microlens and a wave combining device. The second microlens is located on the end face of the second laser and is used to shape the second light beam output by the second laser; The combining device is used to combine the shaped first light beam output by the first microlens and the shaped second light beam output by the second microlens into a combined light beam, and output the combined light beam to the isolator.

6. The light emitting assembly according to claim 5, wherein: The light emitting unit further includes a third laser and a third microlens, wherein the third microlens is located on the end face of the third laser and is used to shape the third light beam output by the third laser; The combining device is used to combine the shaped first light beam output by the first microlens, the shaped second light beam output by the second microlens, and the shaped third light beam output by the third microlens into the combined light beam.

7. The optical transmission assembly according to any one of claims 1 to 2 and claims 4 to 6, characterized in that: The light output by the light emitting unit is parallel light. The light emitting assembly further comprises: a converging lens, which is located at the light outlet and is used to couple the parallel light to the optical fiber.

8. The optical transmission assembly according to any one of claims 1 to 2 and claims 4 to 6, characterized in that: The isolator is a Faraday isolator.

9. An optical transceiver assembly, characterized in that: It comprises a light receiving component and a light emitting component as claimed in any one of claims 1 to 8, wherein the light receiving component is located in the housing and is used to receive a light beam through the light outlet.

10. An optical communication device, characterized in that: It comprises a circuit board, and the optical transmitting assembly according to any one of claims 1 to 8 connected to the circuit board, or the optical transceiver assembly according to claim 9 connected to the circuit board.

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