WO2019173998A1 - Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon - Google Patents

Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon Download PDF

Info

Publication number
WO2019173998A1
WO2019173998A1 PCT/CN2018/079137 CN2018079137W WO2019173998A1 WO 2019173998 A1 WO2019173998 A1 WO 2019173998A1 CN 2018079137 W CN2018079137 W CN 2018079137W WO 2019173998 A1 WO2019173998 A1 WO 2019173998A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
waveguide
light
splitter
receiver
Prior art date
Application number
PCT/CN2018/079137
Other languages
English (en)
Chinese (zh)
Inventor
陈聪
董英华
李书
杨素林
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2018/079137 priority Critical patent/WO2019173998A1/fr
Priority to CN201880091177.3A priority patent/CN111869136B/zh
Publication of WO2019173998A1 publication Critical patent/WO2019173998A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers

Definitions

  • the present application relates to the field of optical communication technologies, and in particular, to a light receiving component, a combined transceiver component, a combined optical module, an optical line terminal, and a passive optical network system.
  • Passive Optical Network such as EPON (Ethernet Passive Optical Network) (EPON) and Gigabit Passive Optical Network (GPON)
  • EPON Ethernet Passive Optical Network
  • GPON Gigabit Passive Optical Network
  • the PON) system has begun large-scale deployment and achieved fiber-to-the-home.
  • the downlink rate of GPON/EPON is 2.5 Gbps or 1.25 Gbps, and the behavior is 1.25 Gbps.
  • XG(S)-PON That is, the deployment of a 10 Gbps downlink rate PON network has been put on the agenda.
  • XG(S)-PON is a tree-like optical network structure like GPON/EPON.
  • Figure 1 shows the general structure of a PON system.
  • a passive optical network system includes an optical line terminal (OLT) at the central office, and a passive optical splitter (POS) for branching/coupling. And an optical network unit (ONU). All the optical links from the OLT to the ONU are called optical delivery networks (ODNs). The direction from the OLT to the ONU is called the downlink direction.
  • OLT optical line terminal
  • POS passive optical splitter
  • ODNs optical delivery networks
  • the 1680nm center wavelength is used in the EPON network, and the 1577nm center wavelength is used in the XG(S)-PON; the uplink direction is from the ONU to the OLT direction, and the 1310nm center wavelength is used in the G/EPON network.
  • the XG(S)-PON A center wavelength of 1270 nm is used.
  • Combo PON optical components are the research hotspots in the industry. Because the functions of G/EPON and XG(S)-PON need to be integrated into one optical module, the optoelectronic devices are multiplied, facing miniaturization, low cost, high performance. Low power and other issues.
  • TO Traditional Transistor Outline
  • BOSA Bi-directional Bi-directional Optical Sub Assembly
  • LD Laser Diode
  • PD Photodiode
  • the filter, the square tube body and the fiber access port (receptacle) are composed of components, and the receptacle is a component containing the ceramic ferrule and the optical fiber, because the transmitting end of the LD TO is relatively close to the receiving end face of the receptacle, about 4-6 mm. Therefore, non-parallel optical coupling is generally used.
  • the principle of non-parallel optical coupling is to collimate and converge the light emitted by the LD through a coupling lens, and directly couple with the end face of the optical fiber. The size is small, the coupling technology is mature, and the cost is low.
  • the Combo optical component has two optical devices and two optical devices.
  • the package schematic is shown in FIG. 2.
  • the housing 01 is packaged with two transmitters 02 and two receivers 03.
  • the size of the device increases due to the increase of optical devices.
  • the coupling distance between the transmitter 02 and the fiber end face 04 is greatly increased, and the distance H from the farthest 10G LD transmitting end to the fiber end face is about 16-20 mm, which is much larger than the conventional BOSA device 4-6 mm coupling distance. Still using non-parallel optical coupling, the coupling efficiency will be greatly reduced, from 60% to 6%, and the coupling loss is too large.
  • the light emitted by the LD needs to be collimated into a parallel beam by a parallel optical coupling lens, and the transmission distance is still parallel, and then a converging lens is coupled with the end face of the fiber.
  • a parallel optical coupling system the light emitted by the LD needs to be collimated into a parallel beam by a parallel optical coupling lens, and the transmission distance is still parallel, and then a converging lens is coupled with the end face of the fiber.
  • the converging spot is concentrated at the same end by the optical fiber receiving end.
  • Receiving means that the parallel beams of multiple emission paths must be parallel to each other, so the two-way emission TO must be actively coupled to ensure coupling efficiency.
  • the positional offset and angular offset have an effect on the coupling efficiency, and the angular offset has a great influence on the coupling efficiency. Therefore, the combo optical component with parallel optical coupling must give priority to the optical path angle.
  • Source coupling, then active adjustment of the position offset requires six dimensions of adjustment. The three-dimensional adjustment from the six-dimensional adjustment to the angle-only adjustment can only be achieved if the displacement accuracy is sufficient. As a result, parallel optical coupling systems are costly when applied to combo PON optical components.
  • the embodiments of the present application provide a light receiving component, an optical transmitting component, a combined transceiver component, a combined optical module, an optical line terminal, and a passive optical network system, which solve the problem of high cost of the existing Combo PON optical component.
  • the present application provides a light receiving component, including a first housing, the first housing is provided with an optical entrance and an optical fiber inlet, and the first optical splitter is disposed at the optical entrance, and the first splitter A first optical waveguide is connected between the optical fiber access port and the second optical splitter, the first optical receiver and the second optical receiver are disposed in the first housing, and the downstream optical signal enters through the optical entrance and passes through the first After being transmitted, the splitter is transmitted from the first optical waveguide to the optical fiber access port, and the upstream optical signal enters through the optical fiber access port, and is sequentially transmitted through the first optical waveguide, the first splitter is reflected, and the second splitter is split and respectively A first light receiver and a second light receiver are input.
  • the optical waveguide is used as the optical path in the first casing, the descending optical signal is sequentially transmitted through the first splitter, and the first optical waveguide is transmitted to enter the optical fiber inlet, due to the optical waveguide.
  • the mode field and the mode field of the fiber are matched, so the coupling efficiency is high.
  • the first optical waveguide connecting the fiber access port and the first splitter is equivalent to shortening the coupling distance between the fiber inlet and the first splitter. Therefore, the coupling of the transmitting end can use the conventional non-parallel optical coupling, and the coupling process is mature and convenient, and the cost is low.
  • the second splitter is a planar lightwave loop type splitter
  • the planar lightwave loop type splitter comprises a second optical waveguide and a third optical waveguide
  • the second optical waveguide is connected to the first optical receiver.
  • the third optical waveguide is connected to the second optical receiver.
  • a substrate is disposed in the first housing, and the first optical waveguide, the second optical waveguide, and the third optical waveguide are integrated optical waveguides formed on the substrate.
  • the integrated chip can be made smaller in size and the package structure is more compact.
  • the first optical waveguide, the second optical waveguide, and the third optical waveguide are optical fibers.
  • the first light receiver and the second light receiver are waveguide type photodetectors
  • the first light receiver is formed on the second optical waveguide by a semiconductor patterning process
  • the second light receiver is patterned by the semiconductor The process is formed on a third optical waveguide. This further reduces costs.
  • the waveguide type photodetector may employ a silicon germanium waveguide type PD.
  • the first light receiver and the second light receiver may be avalanche photodiodes to improve the sensitivity of the detection.
  • the second splitter is a thin film filter type splitter, and the second splitter and the first splitter are connected by a fourth optical waveguide, and the first optical receiver is located at the second splitter On the transmitted light path of the wave device, the second light receiver is located on the reflected light path of the second splitter, and the second light receiver and the second splitter are connected by the fifth optical waveguide.
  • a substrate is disposed in the first housing, and the first optical waveguide, the fourth optical waveguide, and the fifth optical waveguide are integrated optical waveguides formed on the substrate.
  • the first optical waveguide, the second optical waveguide, the third optical waveguide, the fourth optical waveguide, and the fifth optical waveguide are a silicon dioxide waveguide, a silicon waveguide, an InP waveguide, or a silicon nitride waveguide.
  • the downlink optical signal includes an optical signal of a wavelength of 1490 nm and an optical signal of a wavelength of 1577 nm;
  • the upstream optical signal includes an optical signal of a wavelength of 1310 nm and an optical signal of a wavelength of 1270 nm.
  • the present application provides an optical transmitting component capable of transmitting a downlink optical signal to an optical entrance of a light receiving component, and the optical transmitting component adopts a non-parallel optical coupling structure.
  • the optical transmitting component provided by the embodiment of the present application uses a conventional non-parallel optical coupling structure, the coupling process is mature and low in cost.
  • the light transmitting component includes a second housing, the second housing is provided with a light exiting opening, and the light emitting opening is opposite to the light receiving opening of the light receiving component, and the first light is disposed in the second housing a transmitter, a second optical transmitter and a combiner, wherein the combiner is located on a transmitting optical path of the first optical transmitter and the second optical transmitter, and the first non-parallel light is disposed between the combiner and the first optical transmitter a coupling lens, a second non-parallel optical coupling lens is disposed between the combiner and the second optical transmitter, and the combiner can transmit the optical signals sent by the first optical transmitter and the second optical transmitter to the optical outlet. .
  • non-parallel optical coupling lens Since only one non-parallel optical coupling lens is disposed on the light path of the first optical transmitter and the second optical transmitter, and a combination structure of the collimating lens and the converging lens is not used, non-parallel optical coupling is adopted, and Multi-dimensional adjustment when parallel optical coupling is performed, thereby reducing the manufacturing cost of the Combo PON.
  • the combiner may be a filter-type combiner, and the optical signal sent by the first optical transmitter is transmitted through the filter-type combiner and then emitted by the light-emitting port, and the second optical transmitter is emitted. The emitted optical signal is reflected by the filter-type combiner and then emitted from the light exit port.
  • the application provides a combined transceiver component, including:
  • the light receiving component is the light receiving component of any one of the above first aspects.
  • the application provides a combined transceiver component, including:
  • the optical transmitting component which is the optical transmitting component in any one of the above second aspects.
  • the application provides a combined transceiver component, including:
  • the light receiving component is the light receiving component of any one of the above first aspects
  • the optical transmitting component which is the optical transmitting component in any one of the above second aspects.
  • the optical waveguide is used as the optical path in the first housing of the light receiving component
  • the downlink optical signal sent by the optical transmitting component is sequentially transmitted through the first splitter and transmitted by the first optical waveguide. Enter the fiber access port. Since the mode field of the optical waveguide and the mode field of the optical fiber are matched, the coupling efficiency is high, and the first optical waveguide connecting the optical fiber inlet and the first splitter is equivalent to the optical transmitter in the optical fiber inlet and the optical transmitting component.
  • the coupling distance between the two is shortened. Therefore, the coupling of the optical transmitting component can use a conventional non-parallel optical coupling structure, and the coupling process is mature and low in cost.
  • the present application provides a combined optical module, including the light receiving component of the first aspect, or the optical transmitting component of the second aspect, or the electronic component and the third aspect, the fourth aspect, and the fifth The combined transceiver component of any one of the aspects, wherein the electronic component is electrically connected to the light receiving component and the light transmitting component of the combined transceiver component, respectively.
  • the present application provides an optical line terminal, including the combined optical module in the technical solution of the sixth aspect.
  • the optical line terminal further includes a single board and a chassis for placing the combined optical module.
  • the application provides an optical network unit, including the combined optical module in the technical solution of the sixth aspect.
  • the present application provides a passive optical network system, including:
  • optical line terminal wherein the optical line terminal is an optical line terminal in any one of the technical solutions of the seventh aspect
  • the light distribution network is connected to the optical line terminal;
  • a plurality of optical network units the plurality of optical network units being connected to the optical distribution network.
  • the optical module of the at least one of the plurality of optical network units is a GPON optical module, and the optical module of the at least one of the optical network units is an XGPON optical module;
  • the optical module of the at least one of the plurality of optical network units is an EPON optical module, and the optical module of at least a part of the optical network unit is a 10G-EPON optical module; or
  • the optical module of at least a part of the plurality of optical network units is the combined optical module in the technical solution of the sixth aspect.
  • each of the plurality of optical network units may include at least one of a GPON optical module, an XGPON optical module, a 25G-GPON optical module, and a 50G-GPON optical module.
  • each of the plurality of optical network units may include at least two of an EPON optical module, a 10G-EPON optical module, a 25G-EPON optical module, and a 50G-EPON optical module.
  • the combined optical module can simultaneously support any two of GPON, XGPON, 25G GPON, and 50G GPON, or support any two of EPON, 10GEPON, 25G EPON, and 50G EPON.
  • the combined optical module, the optical line terminal, and the passive optical network system provided by the embodiments of the present application, because the optical receiving component in the combined optical module uses an optical waveguide as the optical path, and the mode field of the optical waveguide and the mode field of the optical fiber Matching, so the coupling efficiency is very high, and the first optical waveguide connecting the fiber access port and the first splitter is equivalent to shortening the coupling distance between the optical fiber inlet and the optical transmitter in the optical transmitting component, and therefore, the optical transmitting component
  • the coupling can use traditional non-parallel optical coupling, and the coupling process is mature and low in cost.
  • 1 is a network structure diagram of a passive optical network
  • FIG. 2 is a package structure diagram of a Combo optical component
  • FIG. 3 is a schematic diagram of a package structure when a light receiving component adopts a PLC type splitter according to an embodiment of the present application;
  • FIG. 4 is a schematic view showing the arrangement positions of the first optical waveguide and the second optical waveguide in FIG. 3;
  • FIG. 5 is a schematic diagram of a package structure when a light receiving component of the embodiment of the present invention adopts a waveguide type photodetector
  • FIG. 6 is a schematic diagram of a package structure when a light receiving component of the embodiment of the present application adopts a TFF type splitter;
  • FIG. 7 is a schematic diagram of a package structure when a combined transceiver unit adopts a PLC type splitter according to an embodiment of the present application;
  • FIG. 8 is a schematic diagram of a package structure when a combined transceiver component adopts a TFF type splitter according to an embodiment of the present application.
  • the embodiments of the present application relate to a light receiving component, an optical transmitting component, a combined transceiver component, a combined optical module, and a passive optical network system.
  • a light receiving component an optical transmitting component
  • a combined transceiver component a combined optical module
  • a passive optical network system a passive optical network system
  • a passive optical network refers to an optical fiber distribution network (ODN) between an OLT and an ONU without any active electronic equipment.
  • ODN optical fiber distribution network
  • the ODN is a fiber-to-the-home cable network based on PON equipment. Its role is to provide an optical transmission channel between the OLT and the ONU.
  • Wavelength division multiplexing is the convergence of two or more optical carrier signals of different wavelengths (carrying various kinds of information) at the transmitting end via a multiplexer (also known as a combiner). a technology that is coupled together and coupled to the same fiber of the optical line; at the receiving end, a demultiplexer (also known as a splitter or demultiplexer) separates optical carriers of various wavelengths, and then Further processing by the optical receiver to recover the original signal. This technique of simultaneously transmitting two or many different wavelength optical signals in the same fiber is called wavelength division multiplexing.
  • Optical transmission module referred to as optical module, including Bi-directional Optical Sub-assembly (BOSA) and Electronic Subassembly (ESA).
  • the optical transmission module is electrically connected to the peripheral electronic component (ESA) and then to the optical module housing, thereby forming an optical transmission module.
  • BOSA Bi-directional Optical Sub-assembly
  • ESA Electronic Subassembly
  • Bi-directional Optical Sub-assembly mainly includes a Transmitting Optical Sub-assembly (TOSA) and a Receiving Optical Sub-assembly (ROSA).
  • TOSA Transmitting Optical Sub-assembly
  • ROSA Receiving Optical Sub-assembly
  • TOSA Transmitting Optical Sub-assembly
  • ROSA Receiving Optical Sub-assembly
  • Optical waveguide A medium device that guides the propagation of light waves therein, also known as a dielectric optical waveguide.
  • a medium device that guides the propagation of light waves therein also known as a dielectric optical waveguide.
  • the other type is a cylindrical optical waveguide, commonly referred to as an optical fiber.
  • an optical module that can support any two different transmission rates at the same time may be referred to as a Combo optical module.
  • the combined optical module can simultaneously support any two of GPON, XGPON, 25G GPON, and 50G GPON. Or support any two of EPON, 10GEPON, 25G EPON, and 50G EPON. It can be understood that the above combined optical module can also be referred to as an optical module.
  • the optical line terminal in the GPON transmits at a wavelength of 1490 nm and receives at a wavelength of 1310 nm.
  • the optical line terminal in the XGPON transmits at a wavelength of 1577 nm and receives at a wavelength of 1270 nm.
  • the two sets of wavelength optical signals need to be received and transmitted, and a certain structural design is used to achieve coexistence, which requires a series of WDM modules (synthesizers or splitters). Convergence and separation of light at two wavelengths.
  • the embodiment of the present application provides a light receiving component, including a first housing 1.
  • the first housing 1 is provided with an optical entrance 11 and an optical fiber inlet 12, and the optical inlet 11 is provided with a first a first optical waveguide 31 is connected between the first demultiplexer 2 and the optical fiber inlet 12, and a second demultiplexer 4, a first optical receiver 51 and a first
  • the second optical receiver 52 the downstream optical signal a1 enters through the optical port 11 and is transmitted by the first demultiplexer 2, and then transmitted by the first optical waveguide 31 to the optical fiber access port 12, and the upstream optical signal b1 is accessed by the optical fiber access port 12. And sequentially transmitted through the first optical waveguide 31, reflected by the first demultiplexer 2, and demultiplexed by the second demultiplexer 4, and then input to the first optical receiver 51 and the second optical receiver 52, respectively.
  • the downstream optical signal a1 is sequentially transmitted through the first splitter 2, and the first optical waveguide 31 is transmitted to enter the optical fiber inlet.
  • the coupling efficiency is high, and the first optical waveguide 31 connecting the optical fiber inlet 12 and the first demultiplexer 2 is equivalent to the optical fiber inlet 12 and the first
  • the coupling distance between the splitter 2 is shortened. As shown in Fig. 7, the coupling distance is shortened from the original D1 to D2. Therefore, the coupling of the transmitting end can use the conventional non-parallel optical coupling, and the coupling process is mature and convenient, and the cost is low.
  • the second demultiplexer 4 functions to separate the upstream optical signal b1, and the second demultiplexer 4 can be a Planar Lightwave Circuit (PLC) type demultiplexer or a thin film filter (Thin Flim Filter, TFF).
  • PLC Planar Lightwave Circuit
  • TFF thin film filter
  • the type of splitter or the like is not limited herein.
  • the second splitter 4 is a planar lightwave loop type combiner, the specific package structure is as shown in FIG. 3, and the planar lightwave loop type splitter includes the second light.
  • the waveguide 41 and the third optical waveguide 42, the second optical waveguide 41 is connected to the first optical receiver 51, and the third optical waveguide 42 is connected to the second optical receiver 52.
  • the upstream optical signal b1 entered by the optical fiber access port 12 is transmitted to the first splitter 2 through the first optical waveguide 31, and is reflected by the first splitter 2 to the second splitter 4, and the optical signal passes through the second
  • the optical waveguide 41 is transmitted to the first optical receiver 51, and the other optical signal is transmitted along the third optical waveguide 42 to the second optical receiver 52.
  • the second optical waveguide 41 may extend along the reflected optical path of the first optical waveguide 31 with respect to the first demultiplexer 2.
  • the optical waveguide includes an integrated optical waveguide and a cylindrical optical waveguide, wherein the integrated optical waveguide includes a planar (thin film) dielectric optical waveguide and a strip dielectric optical waveguide, and the cylindrical optical waveguide is an optical fiber.
  • the first optical waveguide 31, the second optical waveguide 41, and the third optical waveguide 42 may be an integrated optical waveguide or an optical fiber, which is not limited herein.
  • the optical waveguide adopts the integrated optical waveguide, as shown in FIG. 3, the optical waveguide can be integrated on the substrate 13, that is, the first optical waveguide 31, the second optical waveguide 41, and the third optical waveguide 42 are all patterned by the semiconductor.
  • the process is integrated on the substrate 13.
  • the integrated chip can be made smaller in size and the package structure is more compact, so that the entire Combo PON optical component can realize SFP+ (Small Form-factor Pluggables) package size.
  • the first photoreceiver 51 and the second photoreceiver 52 may be an avalanche photodiode (APD), which is a pn junction type photodetecting diode in which avalanche multiplication of carriers is utilized.
  • APD avalanche photodiode
  • the effect is to amplify the photoelectric signal to increase the sensitivity of the detection.
  • the photosensitive surface of the APD is relatively large, the coupling of the APD and the optical waveguide is relatively easy, and passive coupling can be used, that is, the APD is directly mounted on the optical waveguide after designing the corresponding position.
  • the first optical receiver 51 and the second optical receiver 52 may also adopt a waveguide type photodetector. As shown in FIG.
  • the first optical receiver 51 is formed by a semiconductor patterning process.
  • the second optical receiver 52 is formed on the third optical waveguide 42 by a semiconductor patterning process.
  • a waveguide type photodetector can employ a silicon germanium waveguide type PD to form a germanium layer on a conventional silicon waveguide, thereby obtaining a photodetector having good performance suitable for optical communication.
  • the waveguide type photodetector can also be made of other materials.
  • the second demultiplexer 4 is a TFF type demultiplexer, as shown in FIG. 6, the second demultiplexer 4 and the first demultiplexer 2 are connected by a fourth optical waveguide 32, and the first optical receiver 51 is connected.
  • the second optical receiver 52 is located on the reflected optical path of the second demultiplexer 4, and the second optical receiver 52 and the second diplexer 4 are passed through the fifth optical waveguide 33. connection.
  • the upstream optical signal b1 entered by the optical fiber access port 12 is transmitted to the first splitter 2 through the first optical waveguide 31, and is reflected by the first splitter 2 to the second splitter 4, and the optical signal passes through the second
  • the splitter 4 is transmitted and transmitted to the first optical receiver 51, and the other optical signal is reflected by the second splitter 4 and transmitted to the second optical receiver 52 via the fifth optical waveguide 33.
  • the fourth optical waveguide 32 and the fifth optical waveguide 33 may also be integrated optical waveguides formed on the substrate 13.
  • the first optical waveguide 31, the second optical waveguide 41, the third optical waveguide 42, the fourth optical waveguide 32, and the fifth optical waveguide 33 may be a silicon dioxide waveguide, a silicon waveguide, an InP waveguide, or a silicon nitride waveguide.
  • the downstream optical signal a1 includes an optical signal of 1490 nm wavelength and an optical signal of 1577 nm wavelength;
  • the upstream optical signal b1 includes an optical signal of 1310 nm wavelength and an optical signal of 1270 nm wavelength.
  • the embodiment of the present application further provides a combined transceiver component, including:
  • the light receiving component 100, the light receiving component 100 is the light receiving component in any of the above embodiments;
  • the optical transmitting component 200 can transmit the downstream optical signal a1 to the light entrance 11 of the light receiving component, and the optical transmitting component adopts a non-parallel optical coupling structure.
  • the optical waveguide is used as the optical path in the first housing 1 of the light receiving component, the downstream optical signal a1 emitted by the optical transmitting component is sequentially transmitted through the first splitter 2, and the first After the optical waveguide 31 is transmitted, it enters the fiber access port 12. Since the mode field of the optical waveguide and the mode field of the optical fiber are matched, the coupling efficiency is high, and the first optical waveguide 31 connecting the optical fiber inlet 12 and the first splitter 2 is equivalent to the optical fiber inlet 12 and the optical transmitting component. The coupling distance between the optical transmitters is shortened. Therefore, the coupling of the optical transmitting components can use a conventional non-parallel optical coupling structure, and the coupling process is mature and low in cost.
  • the structure of the optical transmitting component may be as shown in FIG. 7 , and includes a second housing 6 , and the second housing 6 is provided with an optical outlet, an optical outlet and a light receiving component.
  • the light entrance 11 is opposite, and the second housing 6 is provided with a first optical transmitter 71, a second optical transmitter 72 and a combiner 8, and the combiner 8 is located at the first optical transmitter 71 and the second optical transmitter.
  • a first non-parallel optical coupling lens 711 is disposed between the combiner 8 and the first optical transmitter 71, and a second non-parallel light is disposed between the combiner 8 and the second optical transmitter 72.
  • the coupling lens 721 and the combiner 8 can multiplex the optical signals transmitted by the first optical transmitter 71 and the second optical transmitter 72 to the light exit port. Since only one non-parallel optical coupling lens is disposed on the light path of the first optical transmitter 71 and the second optical transmitter 72, and a combination of a collimating lens and a converging lens is not used, non-parallel optical coupling is adopted. Multi-dimensional adjustment when parallel optical coupling is not required, thereby reducing the manufacturing cost of the Combo PON.
  • the multiplexer 8 can be a filter-type multiplexer 8. As shown in FIG. 7, the optical signal emitted by the first optical transmitter 71 is transmitted through the filter-type multiplexer 8 and then emitted from the light-emitting port. The optical signal from the transmitter 72 is reflected by the filter-type combiner 8 and then emitted from the light-emitting port.
  • an isolator 9 can be provided on the light exit side of the optical transmitter for emitting an optical signal of 1577 nanometers wavelength, and the isolator 9 can isolate the reflected light to eliminate the effect of the reflected light on the high rate laser.
  • the second housing 6 may be a coaxial tube-shell structure, and the first housing 1 may be a box-packing structure.
  • the first housing 1 and the second housing 6 may be separately fabricated and welded, or may be integrally formed. There is no limit here.
  • the combined transceiver assembly of any of the above embodiments is electrically connected to a peripheral electronic component (ESA) and then loaded into the optical module housing to form a combined optical module.
  • ESA peripheral electronic component
  • the optical circuit terminal is formed by connecting the above-mentioned combined optical module to a single board and placing it in the chassis.
  • the above combined optical module can be used in an optical network unit to form an optical network unit that can simultaneously support optical signals of two wavelengths.
  • the passive optical network system When the optical line terminal is applied to a passive optical network system, the passive optical network system includes:
  • the light distribution network is connected to the optical line terminal;
  • a plurality of optical network units the plurality of optical network units being connected to the optical distribution network.
  • the optical waveguide is used as the optical path in the first casing 1 of the optical receiving component, and the mode field of the optical waveguide matches the mode field of the optical fiber, Therefore, the coupling efficiency is high, and the first optical waveguide 31 connecting the optical fiber inlet 12 and the first splitter 2 is equivalent to shortening the coupling distance between the optical fiber inlet 12 and the optical transmitter in the optical transmitting component, and therefore, the light
  • the coupling of the transmitting components can use conventional non-parallel optical coupling, and the coupling process is mature and low in cost.
  • the optical module of the at least one of the plurality of optical network units may be a GPON optical module, and the optical module of at least a part of the optical network unit may be an XGPON optical module; or
  • the optical module of the at least one of the plurality of optical network units may be an EPON optical module, and the optical module of at least a part of the optical network unit may be a 10G-EPON optical module, or
  • the optical module of at least a part of the plurality of optical network units is the combined optical module.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Communication System (AREA)

Abstract

Selon certains modes de réalisation, la présente invention concerne un ensemble de réception optique, un ensemble émetteur-récepteur combiné, un module optique combiné, un OLT et un système PON, se rapportant au domaine de la technologie de communication optique. L'ensemble de réception optique comprend un premier boîtier, le premier boîtier étant pourvu d'un orifice d'entrée de lumière et d'un orifice d'accès à fibre optique, un premier démultiplexeur étant prévu au niveau de l'orifice d'entrée de lumière, un premier guide d'ondes optique étant connecté entre le premier démultiplexeur et l'orifice d'accès à fibre optique, le premier boîtier étant pourvu d'un second démultiplexeur, d'un premier récepteur optique et d'un second récepteur optique à l'intérieur de celui-ci, un signal optique de liaison descendante entrant à partir de l'orifice d'entrée de lumière, étant transmis au moyen du premier démultiplexeur et étant transmis par le premier guide d'ondes optique à l'orifice d'accès à fibre optique, un signal optique de liaison montante entrant provenant de l'orifice d'accès à fibre optique, étant séquentiellement transmis au moyen du premier guide d'ondes optique, réfléchi par le premier démultiplexeur, et démultiplexé par le second démultiplexeur, puis entré dans le premier récepteur optique et le second récepteur optique.
PCT/CN2018/079137 2018-03-15 2018-03-15 Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon WO2019173998A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2018/079137 WO2019173998A1 (fr) 2018-03-15 2018-03-15 Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon
CN201880091177.3A CN111869136B (zh) 2018-03-15 2018-03-15 光接收、组合收发组件、组合光模块、olt及pon系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/079137 WO2019173998A1 (fr) 2018-03-15 2018-03-15 Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon

Publications (1)

Publication Number Publication Date
WO2019173998A1 true WO2019173998A1 (fr) 2019-09-19

Family

ID=67908691

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/079137 WO2019173998A1 (fr) 2018-03-15 2018-03-15 Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon

Country Status (2)

Country Link
CN (1) CN111869136B (fr)
WO (1) WO2019173998A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113596634A (zh) * 2021-07-30 2021-11-02 武汉光迅科技股份有限公司 一种Combo PON OLT单片集成芯片及其光组件
CN114553316A (zh) * 2020-11-26 2022-05-27 华为技术有限公司 光发送组件、光收发组件以及光线路终端
CN115016074A (zh) * 2021-03-04 2022-09-06 青岛海信宽带多媒体技术有限公司 一种光模块

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112505847B (zh) * 2020-11-26 2022-03-29 华为技术有限公司 一种分光比可调的分光器、光纤分纤箱和光配线网络

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6868210B2 (en) * 2003-03-07 2005-03-15 Hitachi, Ltd. Optical waveguide and their application of the optical communication system
JP2007096438A (ja) * 2005-09-27 2007-04-12 Central Glass Co Ltd 双方向光送受信モジュール
CN201051158Y (zh) * 2007-07-02 2008-04-23 深圳新飞通光电子技术有限公司 Plc型单纤双向三端口组件
US7492992B1 (en) * 2003-08-08 2009-02-17 Neophotonics Corporation Bi-directional PLC transceiver device
CN102356573A (zh) * 2011-08-18 2012-02-15 华为技术有限公司 光收发一体组件和光收发模块
CN205656355U (zh) * 2016-04-08 2016-10-19 福建天蕊光电有限公司 一种多波长光收发装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3637228B2 (ja) * 1999-02-09 2005-04-13 住友電気工業株式会社 光送受信モジュール
JP4232657B2 (ja) * 2004-03-02 2009-03-04 住友電気工業株式会社 光部品
JP5059910B2 (ja) * 2010-05-28 2012-10-31 株式会社日立製作所 光受信器および光伝送装置
JP5922042B2 (ja) * 2013-01-10 2016-05-24 Ｎｔｔエレクトロニクス株式会社 光モジュール

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6868210B2 (en) * 2003-03-07 2005-03-15 Hitachi, Ltd. Optical waveguide and their application of the optical communication system
US7492992B1 (en) * 2003-08-08 2009-02-17 Neophotonics Corporation Bi-directional PLC transceiver device
JP2007096438A (ja) * 2005-09-27 2007-04-12 Central Glass Co Ltd 双方向光送受信モジュール
CN201051158Y (zh) * 2007-07-02 2008-04-23 深圳新飞通光电子技术有限公司 Plc型单纤双向三端口组件
CN102356573A (zh) * 2011-08-18 2012-02-15 华为技术有限公司 光收发一体组件和光收发模块
CN205656355U (zh) * 2016-04-08 2016-10-19 福建天蕊光电有限公司 一种多波长光收发装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114553316A (zh) * 2020-11-26 2022-05-27 华为技术有限公司 光发送组件、光收发组件以及光线路终端
CN115016074A (zh) * 2021-03-04 2022-09-06 青岛海信宽带多媒体技术有限公司 一种光模块
CN115016074B (zh) * 2021-03-04 2023-07-14 青岛海信宽带多媒体技术有限公司 一种光模块
CN113596634A (zh) * 2021-07-30 2021-11-02 武汉光迅科技股份有限公司 一种Combo PON OLT单片集成芯片及其光组件
CN113596634B (zh) * 2021-07-30 2023-09-26 武汉光迅科技股份有限公司 一种Combo PON OLT单片集成芯片及其光组件

Also Published As

Publication number Publication date
CN111869136A (zh) 2020-10-30
CN111869136B (zh) 2022-03-29

Similar Documents

Publication Publication Date Title
US11916600B2 (en) Receiver optical sub-assembly, combo bi-directional optical sub- assembly, combo optical module, OLT, and PON system
WO2021004387A1 (fr) Tosa, bosa module optique et dispositif de réseau optique
US9544668B2 (en) Optical network communication system with optical line terminal transceiver and method of operation thereof
WO2019105113A1 (fr) Émetteur-récepteur optique
US8805191B2 (en) Optical transceiver including optical fiber coupling assembly to increase usable channel wavelengths
CN107153237A (zh) 一种多通道硅基波分复用高速光收发一体器件
CN107360481B (zh) 光组件和光线路终端
WO2019173998A1 (fr) Ensemble de réception optique, ensemble émetteur-récepteur combiné, module optique combiné, olt, et système pon
US20210149129A1 (en) Receiver Optical Subassembly, Combo Transceiver Subassembly, Combo Optical Module, Communications Apparatus, and PON System
CN113917628A (zh) 一种Combo Plus OLT光器件
WO2022268131A1 (fr) Ensemble émetteur-récepteur optique
WO2016160898A1 (fr) Couplage amélioré de réseau de photodétecteurs avec des sorties de démultiplexeur optique au moyen d'un matériau à adaptation d'indice
US11057113B1 (en) High-speed silicon photonics optical transceivers
CN115343810A (zh) 盒型封装光收发器件
Ding et al. Combo-PON OLT transceiver using photonic integration technology
CN113917621B (zh) 一种pic芯片、光模块和光网络设备
CN217521404U (zh) 一种Combo PON OLT端光收发器件
WO2024113812A1 (fr) Dispositif optique, terminal de ligne optique, et système de réseau optique passif
CN109416446A (zh) 一种光收发组件
CN117614543A (zh) 一种5g高速光通信的硅基光引擎收发器件

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18909631

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18909631

Country of ref document: EP

Kind code of ref document: A1