CN110708118A - Optical module device and optical fiber capacity expansion system - Google Patents
Optical module device and optical fiber capacity expansion system Download PDFInfo
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Abstract
The invention provides an optical module device and an optical fiber capacity expansion system, wherein the optical module device comprises: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter. The OADM function is integrated on the optical module, networking is optimized, engineering installation difficulty is reduced, network construction cost is saved, and transmission efficiency of optical fiber wavelength is improved.
Description
Technical Field
The invention relates to the field of optical signals, in particular to an optical module device and an optical fiber capacity expansion system.
Background
In the conventional optical fiber, an OADM (optical add/drop multiplexer) technology is used for transmitting optical signals, a general OADM node can be represented by a four-port model, and the basic functions include three types: as shown in fig. 1, the wavelength channels required for the downlink are multiplexed into the uplink signal, so that other wavelength channels pass through as unaffected as possible. The OADM works specifically as follows: the WDM signal from the line includes N wavelength channels, enters the 'Main Input' end of the OADM, selectively outputs the required wavelength channel from the down end and correspondingly inputs the required wavelength channel from the up end from the N wavelength channels according to the service requirement. Other wavelength channels which are not related to local are directly passed through the OADM and output from the line output end of the OADM after being multiplexed with the wavelength channel of the uplink. OADMs implement the functions of traditional electrical SDH add/drop multiplexing in the optical domain, which is done in the time domain, and have transparency and can process signals of any format and rate.
With the development of 5G networks, optical modules are used in each transmission node, but the efficiency of transmitting optical signals by the existing optical modules is low, and the multiplexing of optical fiber channels in the optical modules cannot be effectively improved, thereby increasing the cost for building many networks.
Disclosure of Invention
In order to solve the problem of multiplexing of an optical fiber channel in an optical module, the invention provides an optical module device and an optical fiber capacity expansion system.
In a first aspect, the present invention provides an optical module apparatus, including: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device;
the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter;
the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter;
the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter.
Furthermore, the light emitting sub-device of the narrow-band filter and the light receiving sub-device of the narrow-band filter are connected through a bridging optical fiber.
Further, the light emission sub-device of the narrow-band filter comprises:
the device comprises a light emitter, a first narrow-band filter, a first lens and a first glass capillary tube;
the light emitter sends an optical signal, and the optical signal sequentially passes through the first narrow-band filter, the first lens and the first glass capillary tube.
Further, the light-receiving sub-device of the narrow-band filter includes:
the photoelectric detector, the second narrow-band filter, the second lens and the second glass capillary tube;
the optical signal passes through the second glass capillary, the second lens, the photoelectric detector and the second narrow-band filter in sequence to reach the photoelectric detector.
Further, the light module apparatus further includes: an upper light coupling port;
the upper light coupling port is positioned in the second glass capillary tube.
Further, the light module apparatus further includes: a lower light coupling port;
the lower light coupling port is positioned in the first glass capillary tube.
In a second aspect, the present invention provides a system for expanding optical fiber, where the system expands optical fiber by using the optical module device of the first aspect, and the system includes:
far-end optical fiber capacity expansion equipment with an optical module device and local-end optical fiber capacity expansion equipment with the optical module device;
the remote optical fiber capacity expansion equipment and the local optical fiber capacity expansion equipment are connected in series in an annular mode through optical fibers to establish an annular network;
wherein, the optical module device includes: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter.
Furthermore, the far-end optical fiber capacity expansion equipment comprises at least one optical module device, and the local-end optical fiber capacity expansion equipment comprises at least one optical module device.
In a third aspect, the present invention provides a system for expanding optical fiber, where the system expands optical fiber using the optical module device of the first aspect, and the system includes:
far-end optical fiber capacity expansion equipment and local-end optical fiber capacity expansion equipment with optical module devices;
the far-end optical fiber capacity expansion equipment is connected to the local-end optical fiber capacity expansion equipment in a point-to-point optical fiber series connection mode to establish a star network;
wherein, the optical module device includes: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter.
Further, the local side optical fiber capacity expansion device includes: local side optical fiber capacity expansion equipment with an optical module device and conventional local side optical fiber capacity expansion equipment.
The OADM function is integrated on the optical module, networking is optimized, engineering installation difficulty is reduced, network construction cost is saved, and transmission efficiency of optical fiber wavelength is improved.
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 the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art transmission flow of a WDM-based OADM optical add/drop multiplexer;
FIG. 2 is a schematic diagram of an optical module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a light-emitting sub-device and a light-receiving sub-device of a narrow-band filter according to an embodiment of the present invention;
fig. 4 is a ring network diagram of a system for expanding capacity of optical fibers according to an embodiment of the present invention;
fig. 5 is a ring network diagram of a system for expanding capacity of optical fibers according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of data processing in a single optical module according to an embodiment of the present invention;
fig. 7 is a star network diagram of an optical fiber capacity expansion system according to an embodiment of the present invention;
fig. 8 is a star network diagram of an optical fiber capacity expansion system according to another embodiment of the present invention;
fig. 9 is a schematic diagram of supplying power to a remote station of an optical fiber capacity expansion system according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a remote station power supply of an optical fiber capacity expansion system according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the function, node structure, product and application of the existing WDM-based OADM system add/drop multiplexed tributary signals are referred to as optical channels in units of wavelength. OADM devices are one of the key node devices of an all-optical network.
The WDM signal contains a plurality of wavelength channels which are multiplexed for transmission in an optical fiber, each wavelength channel carrying a separate traffic stream.
If only one wavelength of optical signal is carried in one optical fiber, this cost is expensive relative to the cost of the optical fiber. If optical signals of multiple wavelengths are transmitted in an optical fiber without interfering with each other, the cost is saved and the transmission bandwidth is increased. The WDM technology is currently used to transmit optical signals of various wavelengths in an optical fiber. Each wavelength of optical signal represents a channel, and multiple channels simultaneously transmit data in one optical fiber, i.e. multiplexing of one optical fiber.
The OADM implements the functions of traditional electrical SDH (Synchronous Digital Hierarchy) Add/Drop multiplexing in the optical domain, which is done in the time domain, and has transparency and can process signals of any format and rate, which is superior to the electrical ADM (Add-Drop Multiplexer) used in SDH network.
Here, the term add/drop is used herein to mean add and drop.
Add means that a channel of one wavelength is newly added to an optical signal entering an optical add/drop multiplexer and is multiplexed with other channels into an optical fiber.
Drop means that in the optical signal entering the optical add/drop multiplexer, one wavelength channel is removed and other unrelated channels pass through the optical add/drop multiplexer directly. Note that: the downlink channel is directly transferred to the device for service processing, and is not cut off.
Based on the problems that the efficiency of transmitting optical signals of the existing optical module is low, the multiplexing of optical fiber channels in the optical module cannot be effectively improved, and the cost for building a plurality of networks is increased, and the like, an embodiment of the present invention provides an optical module device, as shown in fig. 2, the optical module device includes: a light emitting sub-device 1 with a narrow-band filter, a light receiving sub-device 2 with a narrow-band filter, a transmitting circuit device 3 and a receiving circuit device 4;
the transmitting circuit device 3 is connected with the light emitting sub-device 1 with the narrow-band filter;
the light emitting sub-device 1 with the narrow-band filter is connected with the light receiving sub-device 2 with the narrow-band filter;
the receiving circuit arrangement 4 is connected to the light-receiving sub-arrangement 2 with a narrow-band filter.
In particular, ROSA (Receiver Optical Subassembly) TOSA (Transmitter Optical Subassembly), in the embodiment of the present invention, ROSA and TOSA are the Optical Subassembly 3 with a narrow-band filter and the Optical Subassembly 1 with a narrow-band filter.
Here, the narrow band filter is subdivided from the band pass filter, and is defined as the band pass filter, that is, the filter allows the optical signal to pass through in a specific wavelength band, and prevents the optical signal from deviating from the specific wavelength band on both sides, and the passband of the narrow band filter is relatively narrow, and is generally 5% or less of the center wavelength value.
As can be seen from fig. 2, the transmitting circuit arrangement 3 is connected to the light emitting sub-assembly 1 with the narrow-band filter for transmitting the light signal sent by the transmitting circuit arrangement to the light emitting sub-assembly 1 with the narrow-band filter; the light emission secondary device 1 of the narrow-band filter is connected with the light receiving secondary device 2 of the narrow-band filter, and is used for transmitting the light signals reflected by the narrow-band filter into a device opposite to the current device, for example, the light signals pass through the light receiving secondary device 2 of the narrow-band filter and are reflected by the light receiving secondary device 2, the specified wavelength light passes through the narrow-band filter and is retained in the light receiving secondary device 2, and the rest wavelengths are reflected into the light emission secondary device 1 of the narrow-band filter; the optical module device in the embodiment of the present invention further includes a receiving circuit device 4, and the receiving circuit device 4 is connected to the light receiving sub-device of the band-narrow band filter, and is configured to receive the specified wavelength passing through the band-narrow band filter.
In addition, the optical module also comprises a control circuit 8 for supporting the short-distance wireless communication function. The optical module and the adjacent optical modules of the same type can realize wireless communication, and jointly realize an optical fiber switching protection protocol.
The OADM function is integrated on the optical module, networking is optimized, engineering installation difficulty is reduced, network construction cost is saved, and transmission efficiency of optical fiber wavelength is improved.
Based on the content of the above embodiments, as an alternative embodiment: the light emitting sub-assembly 1 of the narrow band filter is connected to the light receiving sub-assembly 2 of the narrow band filter by a bridging fiber 5.
In particular, as shown in fig. 2, the light-emitting sub-assembly 1 with the narrow-band filter and the light-receiving sub-assembly with the narrow-band filter are connected by a bridging fiber 5, wherein all wavelengths except a specific wavelength are transmitted in the bridging fiber.
Based on the content of the above embodiments, as an alternative embodiment: the light emission sub-device 1 with narrow-band filters comprises:
a light emitter 101, a first narrow band filter 102, a first lens 103, a first glass capillary 104;
the light emitter 101 transmits an optical signal, and the optical signal passes through the first narrow band filter 102, the first lens 103, and the first glass capillary 104 in this order.
The light-receiving sub-assembly 2 of the narrow-band filter includes:
a photoelectric detector 201, a second narrow-band filter 202, a second lens 203 and a second glass capillary 204;
the optical signal passes through the second glass capillary 204, the second lens 203 and the second narrow-band filter 202 in sequence to reach the photodetector 204.
Specifically, as shown in fig. 3, the optical signal sent by the light emitter 1 passes through the first narrow band filter 102 and the first lens 103, and is injected into the optical fiber located at the center of the glass capillary 3 for output;
the optical signal is input through the optical fiber 6, injected into the second lens 203 through the second glass capillary 204, passes through the second lens 203 and the second narrow-band filter 202 to reach the photodetector 204, and is received.
The rest optical signals except the specific wavelength are input through the optical fiber 6, injected into the second lens 203 through the second glass capillary 204, pass through the second lens 203 to reach the second narrow band filter 202, reflected by the second narrow band filter 202, injected into the bridging optical fiber 5 positioned in the middle of the second glass capillary 204 through the second lens 203 again, enter the first glass capillary 104 through the bridging optical fiber 5, injected into the first lens 103 after passing through the first glass capillary 104 to reach the first narrow band filter 102, reflected by the first narrow band filter 102, injected into the optical fiber 7 positioned in the center of the first glass capillary 104 again through the first lens 103 to be output.
Based on the content of the above embodiments, as an alternative embodiment: the optical module device further includes: an upper light coupling port 205;
the upper light coupling port 205 is located in the second glass capillary 204.
The optical module device further includes: a lower light coupling port 105;
the lower light coupling port 105 is located in the first glass capillary 104.
Specifically, as shown in fig. 3, an upper light coupling port 205 is provided in the middle of the second glass capillary 204 for leading out the upper optical fiber 6, and a lower light coupling port 105 is provided in the middle of the first glass capillary 104 for leading out the lower optical fiber 7.
After the optical signal is processed by the second narrow-band filter 202 in the light receiving sub-device 2, the specified wavelength light passes through the second narrow-band filter 202, and the optical signal is converted into an electrical signal by the photodetector 201 and then processed by the receiving circuit device 4; light with other wavelengths is reflected to the secondary light emitting device 1 through the bridging optical fiber 5, the secondary light emitting device 1 reflects the light with the other wavelengths to the lower optical fiber 7, a specified wavelength optical signal sent by the transmitting circuit 3 is also transmitted to the lower optical fiber 7, and the specified wavelength optical signal sent by the transmitting circuit 3 and the light with the other wavelengths reflected from the upper optical fiber 6 are converged together and transmitted out through the lower optical fiber 7.
According to another aspect of the present invention, an embodiment of the present invention further provides a system for expanding an optical fiber, where the system uses the optical module apparatus in the foregoing embodiments to expand the optical fiber, and the system includes:
far-end optical fiber capacity expansion equipment with an optical module device and local-end optical fiber capacity expansion equipment with the optical module device;
the remote optical fiber capacity expansion equipment and the local optical fiber capacity expansion equipment are connected in series in an annular mode through optical fibers to establish an annular network;
wherein, the optical module device includes: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter.
Specifically, as shown in fig. 4, when service data is transmitted in the far-end optical fiber capacity expansion device with each optical module device, after being processed by the optical module, optical signals with other wavelengths are also transmitted transparently in the device, and are not affected. From the view of the local-side fiber capacity expansion device with the optical module device, it is equivalent to that the far-end fiber capacity expansion device with the optical module device directly communicates with the local-side fiber capacity expansion device with the optical module device point-to-point (through a specific wavelength), and all the far-end fiber capacity expansion devices with the optical module device and the local-side fiber capacity expansion devices with the optical module device are connected in series through a single fiber to form a ring network.
In addition, the interruption of the optical fiber or the failure of the far-end optical fiber capacity expansion equipment at any position in the ring network of the single optical fiber can cause the interruption of the whole ring network service. In order to solve the reliability problem, in the embodiment of the present invention, the far-end fiber expansion device includes at least one optical module device, and the local-end fiber expansion device includes at least one optical module device, as shown in fig. 5, in the embodiment of the present invention, two optical modules provided in the embodiment of the present invention are plugged into each device, where one of the optical modules is used as a master device, and the other optical module is used as a backup device. The main optical module and the standby optical module are in wireless communication, and jointly realize an optical fiber switching protection protocol. When the optical loop where the main optical module is located works normally, the far-end optical fiber capacity expansion equipment transmits uplink/downlink service data through the main optical module; when the main optical loop is abnormal (such as optical fiber interruption), the main optical module informs the standby optical module to work through wireless communication, and the far-end optical fiber capacity expansion equipment performs uplink/downlink data service through the standby optical module.
In addition, fig. 6 shows a schematic diagram of data processing in a single optical module, which is detailed as follows: after the wavelength M in the figure enters the ROSA device, an optical signal outside the specific wavelength enters the TOSA device through the bridge optical fiber S, and is emitted together with the specific wavelength entering the TOSA device, so as to complete the output of changing the wavelength M into the wavelength N. That is, the received data electrical signal of the optical module is looped back to the data sending end, and is transmitted out according to another specific wavelength through the TOSA, so that the use of the wavelength conversion module is formed.
According to still another aspect of the present invention, an embodiment of the present invention further provides a system for expanding an optical fiber, where the system expands the optical fiber by using the optical module apparatus in the foregoing embodiments, and the system includes:
far-end optical fiber capacity expansion equipment and local-end optical fiber capacity expansion equipment with optical module devices;
the far-end optical fiber capacity expansion equipment is connected to the local-end optical fiber capacity expansion equipment in a point-to-point optical fiber series connection mode to establish a star network;
wherein, the optical module device includes: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device with the narrow-band filter is connected with the light receiving sub-device with the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device with the narrow-band filter.
In particular, the special wavelength conversion module can transparently transmit optical signals with other wavelengths. The N special wavelength conversion modules can convert optical signals with the same wavelength of the N optical fibers into optical signals with N different wavelengths, and the optical signals with the N different wavelengths are combined into N wavelengths in one optical fiber by the wavelength division multiplexer to be transmitted, so that the transmission effect that one optical fiber is expanded into N optical fibers is achieved.
For example, the following steps are carried out: in a common point-to-multipoint star network-Passive Optical Network (PON), an optical module in the embodiment of the present invention is used as a core, and several WDM are added to form an optical fiber capacity expansion device, and a pair of local end optical fiber capacity expansion devices and a far end optical fiber capacity expansion device form an optical fiber capacity expansion system.
The connection relationship of the local side optical fiber capacity expansion equipment is as follows: as shown in fig. 7 and 8, the transmission wavelength of the local end fiber capacity expansion device is 1490nm, and the reception wavelength is 1270nm to 1370nm (the reception wavelengths in fig. 7 are 1270nm, 1290nm, 1330nm, and 1350 nm); the transmitting wavelength of the optical fiber network unit or the optical line terminal in the far-end optical fiber capacity expansion equipment is 1310nm, and the receiving wavelength is 1470nm to 1570 nm. An optical fiber expansion device at the local side firstly splits 1310nm and 1490nm optical signals through a WDM1(Wavelength Division multiplexer), and a 1490nm optical path passes through an optical module to convert 1490nm light into 1510nm light. The four optical modules can convert 1490m light into 1510, 1530, 1550 and 1570nm wavelength light respectively, and then combine the four wavelength light signals into a combined optical path through WDM2, wherein the combined optical path comprises 1510, 1530, 1550 and 1570nm four wavelengths. WDM4 splits the total optical path into two wavelength interval optical paths: the wavelength range of an optical path is 1470nm to 1570nm, and the optical path is connected with a synthetic optical path output by WDM 2; the wavelength of another optical path ranges from 1270nm to 1370nm, the optical path is connected with WDM3, WDM3 splits optical signals with multiple wavelengths of 1270, 1290, 1330 and 1350nm and connects the optical signals to WDM1 respectively (WDM1 is directly connected with local side optical fiber capacity expansion equipment). The total optical path of WDM4 is connected to remote fiber capacity expansion equipment.
The far-end optical fiber capacity expansion equipment and the local-end optical fiber capacity expansion equipment have the same internal structure, and both comprise the optical module provided by the embodiment of the invention, and the far-end optical fiber capacity expansion equipment also has the same functions of wavelength conversion and light path synthesis, and can convert four paths of 1310nm light into 1270, 1290, 1310 and 1330nm four-wavelength synthesis light.
By using the local side optical fiber capacity expansion equipment and the far end optical fiber capacity expansion equipment in pairs, 4 groups of PONs can be transmitted in a single optical fiber. The capacity expansion of optical fiber transmission is realized by the scheme of the capacity expansion of the optical fiber.
It is understood that 1270nm to 1370nm and 1470nm to 1570nm in the embodiments of the present invention are only exemplary wavelength ranges, and the embodiments of the present invention are not limited to the exemplary wavelength ranges. It should be noted that, in the embodiment of the present invention, both the far-end optical fiber capacity expansion device and the local-end optical fiber capacity expansion device include the optical module apparatus protected by the embodiment of the present invention, so as to achieve the above capacity expansion effect.
The optical module provided in each embodiment of the present invention is applied to a power supply scene, and specifically includes: for the building of the optical fiber capacity expansion system, certain stations cannot obtain power supplies. In particular, in a PON system, a plurality of remote optical splitters are placed at stations without a power supply, so that the remote optical fiber capacity expansion device cannot obtain power. Under the condition that the far end cannot get electricity, a unidirectional (downstream 1490nm wavelength) optical fiber expansion method can be adopted, and the bottleneck that the downstream bandwidth of an operator is in urgent need of increasing is solved. Here, the local-side optical fiber capacity expansion device provided in the embodiment of the present invention is a conventional optical fiber capacity expansion device, and only the far-end optical fiber capacity expansion device includes the optical module device protected by the embodiment of the present invention, so a detailed implementation power supply scenario is described as follows:
as shown in fig. 9 and 10, the unidirectional (downstream) optical fiber capacity expansion system pulls out an original OLT (optical line terminal) optical module of the optical fiber capacity expansion device, and changes to insert the optical module provided in the embodiment of the present invention. The service data of the office fiber capacity expansion equipment # 2, #3, #4 needs to be added to a single optical fiber connected to the original fiber capacity expansion equipment # 1, then the fiber capacity expansion equipment # 2, #3, #4 plugs in the optical modules, connects the 3 OADM optical modules in series by using optical fibers (in a form that the uplink optical fiber of the next module is connected with the downlink optical fiber of the previous module), receives uplink data of a certain specific wavelength (such as 1330, 1350 or 1370nm wavelength) by the ROSA inside each optical module, and transmits and loads the downlink data into the optical fibers through the specific wavelength (such as 1510, 1530 or 1550nm wavelength). Finally, downlink data with four wavelengths of 1490, 1510, 1530 and 1550nm are provided in the downstream optical fiber of the local optical fiber capacity expansion device #4, that is, all the downlink data of the optical fiber capacity expansion devices # 1, #2, #3 and #4 are loaded into a single optical fiber, thereby realizing the optical fiber capacity expansion of the downlink data.
And the downstream optical fiber of the local side optical fiber capacity expansion equipment #4 is connected with the far-end optical fiber capacity expansion equipment or the far-end WDM.
Under the condition that the far end cannot get electricity, the far end optical fiber needs to be connected with the far end WDM. When the remote WDM is connected, an optical splitter attached to the remote WDM combines uplink 1310nm wavelength data of four PON networks into a path of 1310nm wavelength data, the OADM modules in the optical fiber capacity expansion devices # 2, #3, #4 do not receive the 1310nm uplink data, the 1310nm wavelength optical signal (after multiple reflections) penetrates through the OADM optical module, and finally the ordinary OLT optical module in the optical fiber capacity expansion device # 1 receives the 1310nm uplink data.
If the remote site has a power supply condition, the remote optical fiber can be connected with the remote optical fiber capacity expansion device, and the networking topology structure of the system is completely the same as that of the star-type network optical fiber capacity expansion system in the embodiment. When the far-end optical fiber capacity expansion device is connected, the far-end optical fiber capacity expansion device loads the uplink data of the four PON networks into four wavelengths 1310nm, 1330nm, 1350nm and 137nm respectively, the ROSA of the optical modules in the optical fiber capacity expansion devices # 2, #3 and #4 receives the uplink data of the wavelengths 1330nm, 1350nm and 137nm respectively, and the ordinary OLT optical module in the optical fiber capacity expansion device # 1 receives the uplink data of the 1310 nm.
In summary, the optical module plugged in the office OLT instead of the office optical fiber capacity expansion device has the advantages that the office OLT does not need a special office optical fiber capacity expansion device, and only several optical modules are plugged in the optical fiber capacity expansion device, so that the system has a simple structure, lower cost, good maintainability and high cost performance. The remote WDM replaces the remote optical fiber capacity expansion equipment, and has the advantages that power supply of a remote station is not needed, the passive WDM and the attached optical splitter are high in reliability, any station can be switched on without power supply, and the capacity expansion scheme is wide in adaptability when being matched with a downlink optical fiber capacity expansion scheme.
As will be understood by those skilled in the art, the conventional optical fiber device is an OLT device, which includes therein an OLT optical module, and the module is different from the optical module with OADM function provided in the embodiment of the present invention.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.
Finally, the principle and the implementation of the present invention are explained by applying the specific embodiments in the present invention, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An optical module apparatus, comprising: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device;
the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter;
the light emitting sub-device of the narrow-band filter is connected with the light receiving sub-device of the narrow-band filter;
the receiving circuit device is connected with the light receiving sub-device of the narrow-band filter.
2. A light module device as claimed in claim 1, characterized in that the light-emitting sub-assembly of the band-narrow filter is connected to the light-receiving sub-assembly of the band-narrow filter by means of a bridging fiber.
3. A light module device as claimed in claim 1, characterized in that the light emission sub-device of the band-narrow filter comprises:
the device comprises a light emitter, a first narrow-band filter, a first lens and a first glass capillary tube;
the light emitter sends an optical signal, and the optical signal sequentially passes through the first narrow-band filter, the first lens and the first glass capillary tube.
4. A light module device as claimed in claim 1, characterized in that the light-receiving sub-device of the band-narrow filter comprises:
the photoelectric detector, the second narrow-band filter, the second lens and the second glass capillary tube;
and the optical signal sequentially passes through the second glass capillary tube, the second lens, the photoelectric detector and the second narrow-band filter to reach the photoelectric detector.
5. An optical module device as claimed in claim 4, further comprising: an upper light coupling port;
the upper light coupling port is positioned in the second glass capillary.
6. An optical module device as claimed in claim 3, further comprising: a lower light coupling port;
the lower light coupling port is positioned in the first glass capillary.
7. A system for optical fiber expansion, wherein the system performs optical fiber expansion by using the optical module device according to claim 1, and the system comprises:
far-end optical fiber capacity expansion equipment with an optical module device and local-end optical fiber capacity expansion equipment with the optical module device;
the far-end optical fiber capacity expansion equipment and the local-end optical fiber capacity expansion equipment are connected in series in an annular mode through optical fibers to establish an annular network;
wherein the optical module apparatus comprises: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device of the narrow-band filter is connected with the light receiving sub-device of the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device of the narrow-band filter.
8. The system of claim 7, wherein the remote fiber expansion device comprises at least one optical module device, and wherein the local fiber expansion device comprises at least one optical module device.
9. A system for optical fiber expansion, wherein the system performs optical fiber expansion by using the optical module device according to claim 1, and the system comprises:
far-end optical fiber capacity expansion equipment and local-end optical fiber capacity expansion equipment with optical module devices;
the far-end optical fiber capacity expansion equipment is connected to the local-end optical fiber capacity expansion equipment in a point-to-point optical fiber series connection mode to establish a star network;
wherein the optical module apparatus comprises: a light emitting sub-device with a narrow-band filter, a light receiving sub-device with a narrow-band filter, a transmitting circuit device and a receiving circuit device; the transmitting circuit device is connected with the light emitting secondary device with the narrow-band filter; the light emitting sub-device of the narrow-band filter is connected with the light receiving sub-device of the narrow-band filter; the receiving circuit device is connected with the light receiving sub-device of the narrow-band filter.
10. The system of claim 9, wherein the office-side fiber expansion device comprises: local side optical fiber capacity expansion equipment with an optical module device and conventional local side optical fiber capacity expansion equipment.
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| CN210168045U (en) * | 2019-09-05 | 2020-03-20 | 深圳华喆仪器有限公司 | Optical module device |
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