CN212933046U - Multichannel wavelength division multiplexing optical transmission device, receiving device and transceiving equipment - Google Patents
Multichannel wavelength division multiplexing optical transmission device, receiving device and transceiving equipment Download PDFInfo
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- CN212933046U CN212933046U CN202021748283.5U CN202021748283U CN212933046U CN 212933046 U CN212933046 U CN 212933046U CN 202021748283 U CN202021748283 U CN 202021748283U CN 212933046 U CN212933046 U CN 212933046U
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Abstract
The utility model discloses a multichannel wavelength division multiplexing optical transmission device for transmit N way and wait to transmit the light beam, the wavelength that N way waited to transmit the light beam is all inequality, and multichannel wavelength division multiplexing optical transmission device includes: the lens array comprises N collimating lenses, each collimating lens corresponds to one path of light beam to be transmitted and is used for converting the corresponding path of light beam to be transmitted into parallel transmission light; the thin film filter assembly comprises N reflecting surfaces, wherein the N reflecting surfaces are arranged in one-to-one correspondence with the N collimating lenses and are used for reflecting parallel transmission light rays emitted by the N collimating lenses to the same direction to form synthesized parallel light rays; and the focusing lens is positioned in the emergent direction of the thin film filter assembly and used for receiving the combined light and focusing the combined light into a combined light beam. The utility model also provides a multichannel wavelength division multiplexing light receiving element and transceiver. The utility model discloses can reduce device complexity and manufacturing cost, promote space utilization, practicality and the reliability of device.
Description
Technical Field
The utility model relates to a wavelength division multiplexing technical field especially relates to a multichannel wavelength division multiplexing optical transmission device, receiving element and transceiver equipment.
Background
In order to obtain a higher transmission speed, there are generally three methods for an optical module which is currently commercially available in the market: firstly, increasing the single-channel rate, including improving the bandwidth of the device and using an advanced modulation format; secondly, multi-channel transmission is carried out, and the number of channels of optical fibers is increased; and thirdly, wavelength division multiplexing, namely multiplexing a plurality of wavelengths into one optical fiber for transmission.
The existing optical module not only needs to strengthen key control on the thin film filter in the process, but also needs to control the position and the bonding process of each individual device in a key mode, so that the problems of complex module manufacturing process, high cost, low yield of the module in the later period, low stability and the like exist.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a multichannel wavelength division multiplexing optical transmission device, a receiving device, and a transceiving apparatus.
A multichannel wavelength division multiplexing optical transmission device is used for transmitting N channels of light beams to be transmitted, the wavelengths of the N channels of light beams to be transmitted are different, N is an integer greater than 1, and the multichannel wavelength division multiplexing optical transmission device comprises: the lens array comprises N collimating lenses, each collimating lens corresponds to one path of the light beam to be transmitted and is used for converting the light beam to be transmitted into parallel light rays; the thin film filter assembly comprises N reflecting surfaces, the N reflecting surfaces and the N collimating lenses are arranged in a one-to-one correspondence mode and used for reflecting the parallel light rays emitted by the N collimating lenses to the same direction to form combined light rays; and the focusing lens is positioned in the emergent direction of the thin film filter assembly and used for receiving the synthetic light and focusing the synthetic light into synthetic light beams.
A multichannel wavelength division multiplexing optical receiving device for transmitting a light beam to be received including light rays of N different wavelengths, N being an integer greater than 1, comprising: the collimating lens is used for converting the light beam to be received into parallel light rays; the thin film filter assembly is positioned in the emergent direction of the collimating lens and comprises N reflecting surfaces, and each reflecting surface has different reflecting capacity and transmission capacity, so that the light rays with the N wavelengths are reflected on the different reflecting surfaces to generate N paths of reflected light rays; the lens array is positioned in the emergent direction of the thin film filter assembly and comprises N focusing lenses, the N reflecting surfaces and the N focusing lenses are arranged in a one-to-one correspondence mode, and each focusing lens is used for focusing the reflected light rays emitted by the corresponding reflecting surface into reflected light beams; and the photoelectric detector is positioned in the emergent direction of the lens array and used for receiving the N reflected light beams to generate corresponding electric signals.
A multichannel wavelength division multiplexing optical transceiver device comprising a multichannel wavelength division multiplexing optical transmission device as described above and/or a multichannel wavelength division multiplexing optical reception device as described above.
Adopt the embodiment of the utility model provides a, following beneficial effect has:
the multi-path light rays with different wavelengths are emitted from the laser, collimated by the collimating lens, reflected or transmitted in the thin film filter assembly, finally emitted from the emergent surface of the thin film filter assembly, focused and coupled by the focusing lens, and transmitted by the same optical fiber.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural view of a first embodiment of a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
fig. 2 is a schematic structural view of a first embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
fig. 4 is a schematic structural view of a second embodiment of a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
fig. 5 is a schematic structural diagram of a first embodiment of a multichannel wavelength division multiplexing light receiving device provided by the present invention;
fig. 6 is a schematic structural view of a third embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
fig. 7 is a schematic structural view of a second embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device provided by the present invention;
fig. 8 is a schematic structural view of a second embodiment of the multichannel wavelength division multiplexing optical receiving device provided by the present invention;
fig. 9 is a schematic structural diagram of an embodiment of the multichannel wavelength division multiplexing optical transceiver device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a multichannel wavelength division multiplexing optical transmission device according to a first embodiment of the present invention. The multichannel wavelength division multiplexing optical transmission device 10 is configured to transmit N channels of light beams to be transmitted, where N is an integer greater than 1 and is different in wavelength from the N channels of light beams to be transmitted, N is 4 in this implementation scenario, and the wavelengths of the 4 channels of light beams to be transmitted are 1271nm, 1291nm, 1311nm, and 1331nm, respectively. In other implementation scenarios, N may be 2, 3, 5, and so on, and the wavelength of the light beam to be transmitted may be selected according to actual needs.
The multichannel wavelength division multiplexing optical transmission device 10 includes a lens array 11, the lens array 11 includes four collimating lenses 111, 112, 113 and 114, each collimating lens corresponds to one path of light beam to be transmitted, and the incident direction of each collimating lens is perpendicular to the emitting direction of the corresponding light beam to be transmitted. Each collimating lens converts the corresponding path of light beam to be transmitted into parallel transmission light to be emitted. It is understood that in the present implementation scenario, the collimating power of each collimating lens in the lens array 11 is the same or similar, so that the outgoing width of the parallel transmission light emitted by each collimating lens is the same or similar. The exit directions of each collimator lens in the lens array 11 are parallel.
The multichannel wavelength division multiplexing optical transmission device 10 further includes a thin film filter assembly 12, the thin film filter assembly 12 includes four reflecting surfaces 121, 122, 123 and 124, the four reflecting surfaces 121, 122, 123 and 124 and the four collimating lenses 111, 112, 113 and 114 are disposed in a one-to-one correspondence, for example, the reflecting surface 121 and the collimating lens 111 are disposed in a correspondence, so that the parallel transmission light emitted from the collimating lens 111 is emitted to the reflecting surface 121, and is reflected by the reflecting surface 121, and so on, and the parallel transmission light emitted from the remaining collimating lenses is disposed on the corresponding reflecting surfaces.
In this implementation scenario, the four reflecting surfaces 121, 122, 123, and 123 are disposed in parallel, and form an angle of 45 degrees with the horizontal plane, and the arrangement direction of the four reflecting surfaces 121, 122, 123, and 124 is parallel to the arrangement direction of the four collimating lenses 111, 112, 113, and 114, so that the parallel transmission light beams emitted by the four collimating lenses 111, 112, 113, and 114 are deflected by 90 degrees and emitted in the same direction, specifically, emitted from one emitting surface (reflecting surface 121) of the thin film filter assembly 12, thereby forming a combined parallel light beam. In other implementation scenarios, the four reflective surfaces 121, 122, 123, and 124 are included at an angle ranging from 40 degrees to 50 degrees with respect to the horizontal plane, which may be set according to the user's usage.
In the present embodiment, the thin film filter assembly 12 includes three parallelogram blocks 125, 126 and 127 made of the same material (e.g., glass, plexiglass, etc.), and the inclined plane of the parallelogram block 125 away from the parallelogram block 126, the inclined plane of the parallelogram block 126 away from the parallelogram block 127, and the two inclined planes of the parallelogram block 127 are used as the reflective surfaces. Further, special film layers can be coated on the inclined surfaces to enhance the reflection effect of parallel transmission light rays. Further, the tailored film layers coated on the different slopes have different reflection and transmission capabilities, such that the light transmission and reflection capabilities of each reflective slope match the wavelengths of the parallel transmission light reflected thereby, and thus each reflective slope can only reflect light of matched wavelengths and transmit light of unmatched wavelengths. In other implementation scenarios, each reflective slope may be coated with a reflective film layer with specific reflective capability and/or a projection film layer with specific projection capability, so that each reflective slope can only reflect light with matched wavelength and transmit light with unmatched wavelength.
For example, when the light beam to be transmitted with the wavelength of 1271nm is converted into the parallel transmission light beam with the wavelength of 1271nm by the collimating lens 111, and the parallel transmission light beam with the wavelength of 1271nm is emitted to the reflection surface 121, since there may exist light beams with the same direction or similar directions in the ambient light, the light beams will be transmitted because the wavelength of the light beams is not matched with the reflection film of the reflection surface 121, and the parallel transmission light beam with the wavelength of 1271nm will be reflected by the reflection surface 121.
Further, as shown in fig. 1, parallel transmission light rays with other wavelengths also exit through the reflection surface 121, and the other wavelengths are not matched with the reflection film of the reflection surface 121, so that the other wavelengths will be transmitted, and the transmission of the other parallel transmission light rays will not be affected.
In other embodiments, please refer to fig. 2 in combination, fig. 2 is a schematic structural diagram of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device according to the present invention. The thin film filter assembly 22 includes four triangular modules 221, 222, 223, and 224 made of the same material. The slopes of the four triangular modules 221, 222, 223, and 224 are parallel to each other as the reflective surfaces of the thin film filter assembly 22.
In another embodiment, please refer to fig. 3 in combination, fig. 3 is a schematic structural diagram of a second embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device according to the present invention. The thin-film filter assembly 32 includes seven triangular modules 321, 322, 323, 324, 325, 326 and 327 made of the same material, wherein the inclined planes of the four triangular modules 321, 322, 323 and 324 are parallel to each other and serve as the reflective surfaces of the thin-film filter assembly 32, and the triangular modules 325, 326 and 327 are respectively located above the inclined planes of the triangular modules 321, 322 and 323 and are used for filling the gaps between the triangular modules 321, 322 and 323, so that parallel transmission light rays reflected by the four reflective surfaces of the thin-film filter assembly 32 are transmitted in the same medium, and the stability of light ray transmission is improved.
The multi-channel wavelength division multiplexing optical transmission device 10 further includes a focusing lens 13. The focusing lens 13 is located in the exit direction of the thin film filter assembly 12, and the incident surface of the focusing lens 13 is perpendicular to the exit direction of the thin film filter assembly 12. The focusing lens 13 serves to focus the combined parallel light into a combined beam, so that the combined beam can be transmitted through an optical fiber.
As can be seen from the above description, in this embodiment, after being emitted from the laser, the multiple paths of light beams with different wavelengths are collimated by the collimating lens, and then are reflected or transmitted in the thin film filter assembly, and finally emitted from the exit surface of the thin film filter assembly, and are focused and coupled by the focusing lens, so that the same optical fiber can be adopted for transmission.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a second embodiment of a multichannel wavelength division multiplexing optical transmission device provided by the present invention. The multichannel wavelength division multiplexing optical transmission component 40 includes a laser group 41, the laser group 41 includes four lasers 411, 412, 413 and 414, the four lasers 411, 412, 413 and 414 respectively emit a path of light beam to be transmitted, and the light beam to be transmitted emitted by each laser has different wavelengths, for example, the wavelengths are 1271nm, 1291nm, 1311nm and 1331nm respectively. The emission directions of the four lasers 411, 412, 413, and 414 are parallel.
The multi-channel wavelength division multiplexing optical transmission device 40 further includes a lens array 42, and the lens array 42 includes four collimator lenses 421, 422, 423, and 424. Four collimating lenses 421, 422, 423, and 424 are disposed in one-to-one correspondence with the four lasers 411, 412, 413, and 414, respectively, and an incident surface of each collimating lens is perpendicular to an emitting direction of its corresponding laser. The structure and function of the lens array 42 are substantially the same as those of the lens array 11 in the first embodiment of the multi-channel wavelength division multiplexing optical transmission device provided by the present invention, and the description thereof is omitted here.
The multi-channel wavelength division multiplexing optical transmission device 40 further includes an isolator group 43, and the isolator group 43 includes four isolators 431, 432, 433, and 434. Four isolators 431, 432, 433 and 434 are provided. The four collimator lenses 421, 422, 423, and 424 are disposed in one-to-one correspondence. Each of the spacers is located in an exit direction of its corresponding collimating lens, for example, the spacer 431 is located in an exit direction of the collimating lens 421, the spacer 432 is located in an exit direction of the collimating lens 422, the light transmission directions of the four spacers 431, 432, 433 and 434 are parallel, and the arrangement direction of the four spacers 431, 432, 433 and 434 is parallel to the arrangement direction of the four collimating lenses 421, 422, 423 and 424. Each isolator is used for isolating the parallel transmission light rays emitted by the corresponding collimating lens from the parallel transmission light rays emitted by other collimating lenses, and the light transmission precision is further improved.
The multichannel wavelength division multiplexing optical transmission device 40 further includes a thin film filter assembly 44, and the thin film filter assembly 44 includes four reflecting surfaces 441, 442, 443, and 444, and the four reflecting surfaces 441, 442, 443, and 444 are disposed in one-to-one correspondence with the four isolators 431, 432, 433, and 434. The structure and function of the thin film filter assembly 44 are substantially the same as those of the thin film filter assembly 12 in the first embodiment of the multichannel wavelength division multiplexing optical transmission device provided by the present invention, and the detailed description thereof is omitted here.
The multichannel wavelength division multiplexing optical transmission device 40 further includes a focusing lens 45, and the structure and function of the focusing lens 45 are substantially identical to the focusing lens 13 in the first embodiment of the multichannel wavelength division multiplexing optical transmission device provided by the present invention, and the description thereof is omitted here.
The multichannel wavelength division multiplexing optical transmission device 40 further includes a glass head 46, the glass head 46 is disposed corresponding to the focusing lens 45, connected to a single-mode optical fiber 47, and configured to receive the combined beam emitted from the focusing lens 45 and transmit the combined beam to the single-mode optical fiber 47. The glass head 46 can facilitate the fixing of the single-mode fiber pigtail 47 and raise the optical axis for interfacing with other optical transmission components.
The multichannel wavelength division multiplexing optical transmission device 40 further includes an adapter 48 connected to the single mode fiber 47 for connecting the single mode fiber 47 with other optical transmission components, and two ends of the adapter 48 can be inserted into optical fiber connectors of different interface types to realize conversion between different interfaces.
It can be known through the above-mentioned description, in this embodiment, adopt the isolator to keep apart the parallel transmission light of different wavelengths each other, can effectively promote the reliability and the transmission efficiency of light transmission band, each device simple structure, the encapsulation of being convenient for has reduced manufacturing cost, and light transmission route is simple, and the number of times of deflecting is few, has effectively reduced the insertion loss of transmission.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a multichannel wavelength division multiplexing optical receiving device according to a first embodiment of the present invention. The multichannel wavelength division multiplexing light receiving device 50 is used to transmit a light beam to be received including N kinds of light rays with different wavelengths, N is an integer greater than 1, and N is 4 in this implementation scenario.
The multichannel wavelength division multiplexing light receiving device 50 includes a collimator lens 51, and the collimator lens 51 is configured to receive a light beam to be received and convert the light beam to be received into parallel received light.
The multichannel wavelength division multiplexing light receiving device 50 further includes a thin film filter assembly 52 located in the exit direction of the collimator lens 51, and including four reflecting surfaces 521, 522, 523, and 524. Each reflecting surface has different reflecting power and transmission power and respectively corresponds to the light rays with the corresponding wavelength in the light beams to be received, so that the light rays with each wavelength in the parallel received light rays can be reflected on the corresponding reflecting surface. In this implementation scenario, the four reflecting surfaces 521, 522, 523, and 523 are disposed in parallel, and form an angle of 45 degrees with the horizontal plane, and the arrangement direction of the four reflecting surfaces 521, 522, 523, and 524 is parallel to the emitting direction of the collimating lens 51, so that the transmission direction of the parallel received light is deflected by 90 degrees, and the parallel received light is divided into four reflected light beams to be emitted according to the wavelength. In other implementation scenarios, the four reflective surfaces 521, 522, 523, and 524 may form an angle with the horizontal plane in a range from 40 degrees to 50 degrees, which may be set according to the use of the user.
In this implementation, the thin film filter assembly 52 includes three parallelogram blocks 525, 526 and 527 of the same material (e.g., glass, plexiglass, etc.), with the inclined surface of the parallelogram block 525 away from the parallelogram block 526, the inclined surface of the parallelogram block 526 away from the parallelogram block 527, and the two inclined surfaces of the parallelogram block 527 as the reflective surfaces. Further, special film layers can be coated on the inclined surfaces to enhance the reflection effect of parallel received light. Further, the tailored film layers applied on the different slopes have different reflection and transmission capabilities, such that the light transmission and reflection capabilities of each reflective slope match the wavelengths of the parallel received light rays it reflects, such that each reflective slope can only reflect light rays of matched wavelengths and transmit light rays of unmatched wavelengths. In other implementation scenarios, each reflective slope may be coated with a reflective film layer with specific reflective capability and/or a projection film layer with specific projection capability, so that each reflective slope can only reflect light with matched wavelength and transmit light with unmatched wavelength.
For example, the parallel received light includes light with wavelengths of 1271nm, 1291nm, 1311nm and 1331nm, and the four reflecting surfaces 521, 522, 523 and 523 can reflect light with wavelengths of 1271nm, 1291nm, 1311nm and 1331nm respectively. When the parallel received light is incident on the reflection surface 521, the light with the wavelength of 1271nm is reflected by the reflection surface 521, the light with the other wavelengths is transmitted to the reflection surface 522 through the reflection surface 521, the reflection surface 522 reflects the light with the wavelength of 1291nm, the light with the other wavelengths is transmitted to the reflection surface 523 through the reflection surface 522, the reflection surface 523 reflects the light with the wavelength of 1311nm, the light with the wavelength of 1331nm is transmitted to the reflection surface 524 through the reflection surface 524, and the reflection surface 524 reflects the light with the wavelength of 1331 nm. Therefore, it is realized that the four reflecting surfaces 521, 522, 523, and 523 respectively reflect the light rays of the respective corresponding wavelengths. In other implementation scenarios, the wavelength corresponding to each reflecting surface may be additionally set according to actual use requirements, and is not described herein again.
In other embodiments, please refer to fig. 6 in combination, fig. 6 is a schematic structural diagram of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device according to a third embodiment of the present invention. The membrane filter assembly 62 includes four triangular modules 621, 622, 623, and 624 made of the same material. The slopes of the four triangular modules 621, 622, 623 and 624 are parallel to each other as the reflective surfaces of the thin film filter assembly 62.
In another embodiment, referring to fig. 7, fig. 7 is a schematic structural diagram of a second embodiment of a thin film filter assembly in a multichannel wavelength division multiplexing optical transmission device according to the present invention. The thin film filter assembly 72 includes seven triangular modules 721, 722, 723, 724, 725, 726 and 727 made of the same material, wherein the inclined planes of the four triangular modules 721, 722, 723 and 724 are parallel to each other and serve as the reflective surfaces of the thin film filter assembly 72, and the triangular modules 725, 726 and 727 are respectively located above the inclined planes of the triangular modules 721, 722 and 723 and are used for filling the gaps between the triangular modules 721, 722 and 723, so that parallel transmission light rays reflected by the four reflective surfaces of the thin film filter assembly 72 are transmitted in the same medium, and the stability of light ray transmission is improved.
The multichannel wavelength division multiplexing light receiving device 50 further includes a lens array 53, the lens array 53 includes four focusing lenses 531, 532, 533 and 534, each collimating lens corresponds to one path of reflected light, and the incident direction of each focusing lens is perpendicular to the emergent direction of its corresponding reflected light. Each focusing lens converts the corresponding one path of reflected light into a focused reflected light beam to be emitted. It is understood that in the present implementation scenario, the focusing power of each focusing lens in the lens array 53 is the same or similar, and the exit directions of the focusing lenses in the lens array 53 are parallel. The four focusing lenses 531, 532, 533, and 534 are arranged in parallel with the arrangement direction of the four reflecting surfaces 521, 522, 523, and 524.
It can be known through the above description, in this embodiment, treat that received light turns into through collimating lens and treat received parallel light, treat that the received parallel light of different wavelengths is respectively at the plane of reflection of difference through the film filter subassembly, focus every reflected light respectively through focusing lens, generate the reflected light beam, make photoelectric detector can receive the reflected light beam, each device simple structure, the encapsulation of being convenient for has reduced manufacturing cost, and light transmission path is simple, the number of times of deflecting is few, the insertion loss of transmission has effectively been reduced.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a multichannel wavelength division multiplexing optical receiving device according to a second embodiment of the present invention. The multichannel wavelength division multiplexing optical receiving device 80 includes an adapter 81 and a single-mode fiber 82, and is used for connecting the single-mode fiber 82 with other optical transmission components, and two ends of the adapter 81 can be inserted into optical fiber connectors of different interface types, so as to realize conversion between different interfaces.
The multichannel wavelength division multiplexing light receiving device 80 further comprises a glass head 83, wherein the glass head 83 is connected with the single mode fiber 82 and is used for transmitting the light beam to be received output by the single film light and transmitting the combined light beam to the single mode fiber 82. The glass head 83 can facilitate the fixation of the single-mode fiber pigtail 82 and raise the optical axis for facilitating the butt joint with other light transmission components.
The multichannel wavelength division multiplexing light receiving device 80 further comprises a collimating lens 84, and the collimating lens 84 is arranged corresponding to the glass head 83 and is used for receiving the light beam to be received transmitted by the glass head 83 and converting the light beam to be received into parallel received light.
The multichannel wavelength division multiplexing optical receiving device 80 further includes a thin film filter assembly 85, and the thin film filter assembly 85 includes four reflecting surfaces 851, 852, 853, and 854. The structure and function of the thin film filter assembly 85 are substantially the same as those of the thin film filter assembly 52 in the first embodiment of the multichannel wavelength division multiplexing optical receiving device provided by the present invention, and the description thereof is omitted here.
The multichannel wavelength division multiplexing optical receiving device 80 further includes an isolator group (not shown) including four isolators, the four isolators and the thin-film filter assembly 85 are disposed in one-to-one correspondence with the four reflecting surfaces 851, 852, 853, and 854, and each isolator is configured to isolate the reflected light rays reflected by the corresponding reflecting surface from the reflected light rays reflected by the other reflecting surfaces.
The multichannel wavelength division multiplexing optical receiving device 80 further includes a lens array 87, and the lens array 87 includes four focusing lenses 871, 872, 873, and 874. The structure and function of the lens array 87 are substantially the same as those of the lens array 53 in the first embodiment of the multichannel wavelength division multiplexing optical receiver device provided by the present invention, and the description thereof is omitted here.
The multichannel wavelength division multiplexing light receiving device 80 further includes a photodetector 88, and the photodetector 88 is located in the exit direction of the lens array 87, and is configured to receive the four reflected light beams emitted from the lens array 87 and generate corresponding electrical signals. The photodetector 88 includes four light receiving panels 881, 882, 883 and 884. Four light receiving panels 881, 882, 883 and 884 are disposed in one-to-one correspondence with the four focusing lenses 871, 872, 873 and 874. Furthermore, each light receiving panel has a light receiving capability corresponding to the reflected light beam emitted by the corresponding focusing lens. For example, the light receiving panel 881 corresponds to the focusing lens 871, and has the ability to receive the reflected light beam with a wavelength of 1271nm emitted from the focusing lens 871.
The multichannel wavelength division multiplexing light receiving device 80 further includes a reflecting element 89, and the reflecting element 89 is located between the lens array 87 and the photodetector 88, and changes the transmission direction of the four reflected light beams emitted from the lens array 87. In this implementation scenario, reflective element 89 is a triangular prism. The use of the reflecting element 89 may facilitate a more compact and rational structural arrangement of the multichannel wavelength division multiplexing light receiving device 80 without adding a support for the photodetector 88.
In this implementation scenario, to save space resources and product material resources, the reflective element 89, the lens array 87, and the set of isolators can be combined into a triangular prism lens assembly.
It can be known from the above description that in this embodiment, change the transmission direction of reflected light beam through reflective element for the structure setting of device is compacter reasonable, and each device simple structure is convenient for encapsulate, has reduced manufacturing cost, and light transmission path is simple, and the number of times of deflecting is few, has effectively reduced the insertion loss of transmission.
Referring to fig. 9, fig. 9 is a schematic structural diagram of an embodiment of a multichannel wavelength division multiplexing optical transceiver device provided by the present invention. The multichannel wavelength division multiplexing optical transceiver device 90 includes a multichannel wavelength division multiplexing optical transmission device 91 and a multichannel wavelength division multiplexing optical reception device 92. Among them, the multichannel wavelength division multiplexing optical transmission device 91 includes the multichannel wavelength division multiplexing optical transmission device shown in fig. 1 or fig. 4, and the multichannel wavelength division multiplexing optical reception device 92 includes the multichannel wavelength division multiplexing optical transmission device shown in fig. 5 or fig. 8.
As can be seen from fig. 1 to 8, the structures of the thin film filter, the collimating lens, the focusing lens, and other components of the multichannel wdm optical transmission device 91 and the multichannel wdm optical reception device 92 are similar or identical, and the same component can be reused, or the similar component can be used in different components. During production and manufacturing, research and development cost and process cost can be effectively reduced, and production efficiency is improved.
As can be seen from the above description, in this embodiment, the multichannel wavelength division multiplexing optical transceiver has a plurality of components with similar or identical structures, and during manufacturing, development cost and process cost can be effectively reduced, and production efficiency can be improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A multichannel wavelength division multiplexing optical transmission device is used for transmitting N channels of light beams to be transmitted, the wavelengths of the N channels of light beams to be transmitted are different, N is an integer greater than 1, and the multichannel wavelength division multiplexing optical transmission device comprises:
the lens array comprises N collimating lenses, each collimating lens corresponds to one path of light beam to be transmitted and is used for converting the corresponding path of light beam to be transmitted into parallel transmission light;
the thin film filter assembly comprises N reflecting surfaces, the N reflecting surfaces and the N collimating lenses are arranged in a one-to-one correspondence mode, and the thin film filter assembly is used for reflecting the parallel transmission light rays emitted by the N collimating lenses to the same direction to form synthesized parallel light rays;
and the focusing lens is positioned in the emergent direction of the thin film filter assembly and used for receiving the synthetic light and focusing the synthetic light into synthetic light beams.
2. The device of claim 1, wherein each of the reflective surfaces is coated with a tailored film layer such that the light transmission and reflection capabilities of the reflective surfaces match the wavelength of the parallel transmitted light rays reflected by the reflective surfaces.
3. The multichannel wavelength division multiplexed optical transmission device of claim 1 further comprising:
the isolator group comprises N isolators, wherein the N isolators and the N collimating lenses are arranged in a one-to-one correspondence mode, and each isolator is located in the emergent direction of the corresponding collimating lens and used for isolating parallel transmission light rays emitted by the collimating lenses from parallel transmission light rays emitted by other collimating lenses in the lens array.
4. The multichannel wavelength division multiplexed optical transmission device of claim 1 further comprising:
the laser group comprises N lasers used for emitting the N paths of light beams to be transmitted, the N lasers and the N collimating lenses are arranged in a one-to-one correspondence mode, and the emitting direction of each laser is perpendicular to the incident surface of the corresponding collimating lens.
5. A multichannel wavelength division multiplexing optical receiving device for transmitting a light beam to be received including light to be received of N different wavelengths, N being an integer greater than 1, comprising:
the collimating lens is used for converting the light beam to be received into parallel received light;
the thin film filter assembly is positioned in the emergent direction of the collimating lens and comprises N reflecting surfaces, and each reflecting surface has different reflecting capacity and transmission capacity, so that N rays with different wavelengths in the parallel received rays are reflected on different reflecting surfaces to generate N paths of reflected rays;
the lens array is positioned in the emergent direction of the thin film filter assembly and comprises N focusing lenses, the N reflecting surfaces and the N focusing lenses are arranged in a one-to-one correspondence mode, and each focusing lens is used for focusing the reflecting light rays emitted by the corresponding reflecting surface into reflecting light beams.
6. The multichannel wavelength division multiplexing optical receiving device according to claim 5, wherein the multichannel wavelength division multiplexing optical receiving device further comprises:
and the photoelectric detector is positioned in the emergent direction of the lens array and used for receiving the N reflected light beams to generate corresponding electric signals.
7. The multichannel wavelength division multiplexing optical receiving device according to claim 6, characterized in that the multichannel wavelength division multiplexing optical receiving device further comprises:
a reflective element positioned between the lens array and the photodetector for reflecting the N reflected beams such that the N reflected beams are directed toward the photodetector.
8. The multichannel wavelength division multiplexing optical receiving device according to claim 5, wherein the multichannel wavelength division multiplexing optical receiving device further comprises:
the isolator group comprises N isolators, the N isolators and the N reflecting surfaces are arranged in a one-to-one correspondence mode, and each isolator is used for isolating the reflecting light reflected by the reflecting surfaces corresponding to the isolator from the reflecting light reflected by other reflecting surfaces in the thin film filter assembly.
9. The multichannel wavelength division multiplexing light receiving device as claimed in claim 6, wherein the photodetector comprises N light receiving panels, each of which has a different light receiving capability, provided in one-to-one correspondence with the N focusing lenses;
the N reflecting surfaces are covered with transmission films with different reflection capacities and transmission capacities, so that the transmission capacity and the reflection capacity of the reflecting surface where the transmission film is located are matched with the light receiving capacity of the corresponding light receiving panel.
10. A multichannel wavelength division multiplexing optical transceiver device comprising the multichannel wavelength division multiplexing optical transmission device according to claims 1 to 4 and/or the multichannel wavelength division multiplexing optical reception device according to claims 5 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116155383A (en) * | 2023-01-13 | 2023-05-23 | 讯芸电子科技(中山)有限公司 | Single-fiber multi-task transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116155383A (en) * | 2023-01-13 | 2023-05-23 | 讯芸电子科技(中山)有限公司 | Single-fiber multi-task transmission system |
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Address after: Room 1202, Building 1, Dongjiu Innovation Technology Park Phase 1, No. 76 Bulan Road, Xialilang Community, Nanwan Street, Longgang District, Shenzhen City, Guangdong Province, 518300 Patentee after: SHENZHEN OPTICS VALLEY TECHNOLOGY Co.,Ltd. Address before: 518300 Room 301, 3rd floor, building 41, Dayun software Town, 8288 Longgang Avenue, Yuanshan street, Longgang District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN OPTICS VALLEY TECHNOLOGY Co.,Ltd. |