CN107579781B - Optical signal receiving module and optical signal transmitting/receiving device - Google Patents
Optical signal receiving module and optical signal transmitting/receiving device Download PDFInfo
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Abstract
The invention relates to the technical field of optical communication, and provides an optical signal receiving module and an optical signal receiving and transmitting device. The optical signal receiving module comprises a photoelectric conversion unit, a signal amplifying unit and a dual-channel repeater. The photoelectric conversion unit is used for receiving the first optical signal and converting the first optical signal into a first electric signal to be output to the signal amplification unit. The signal amplifying unit is used for amplifying the first electric signal to generate a second electric signal and outputting the second electric signal to the dual-channel repeater. The second electrical signal includes a third electrical signal having a first transmission rate and a fourth electrical signal having a second transmission rate. The first transmission channel of the dual-channel repeater is used for recovering, amplifying and forwarding the third electric signal and recovering, amplifying and forwarding the fourth electric signal. By using the optical signal receiving module in the optical signal receiving and transmitting device, the power consumption, the circuit volume and the manufacturing cost of the optical signal receiving and transmitting device can be remarkably reduced, and the signal receiving sensitivity can be improved.
Description
Technical Field
The present invention relates to the field of optical communications, and in particular, to an optical signal receiving module and an optical signal transmitting/receiving device.
Background
Referring to fig. 1, fig. 1 shows a schematic architecture of a typical optical communication network at present. The current typical optical communication network is divided into three major parts of a core network, an access network, a residence network and the like.
Wherein the core network comprises a content distribution network, a shared telephone switching network, an IP backbone network and the like; the access network comprises an optical path terminal (Optical Line Terminal, abbreviated as OLT) device, a network management server, an optical splitter, an optical network terminal (Optical Network Terminal, abbreviated as ONT) device, an optical network unit (Optical Network Unit, abbreviated as ONU) device and the like; the residence network comprises local area network, user exchanger, voice terminal and data terminal. The core network is connected with the access network through the OLT equipment, and the access network is connected with the residence network through the ONT equipment and the ONU equipment, so that the core network, the access network and the residence network can carry out bidirectional communication by utilizing optical signals. Typical downstream optical signal wavelengths are 1550nm or 1490nm and typical upstream optical signal wavelengths are 1310nm.
The optical module belongs to an access network part thereof and is mainly used for receiving and transmitting photoelectric signals and performing photoelectric conversion according to requirements. Optical modules can be classified into an OLT-side optical module mounted on an OLT device and an ONU-side optical module mounted on an ONU device, both in an ethernet passive optical network (Ethernet Passive Optical Network, EPON) and in a Gigabit passive optical network (Gigabit-capable PassiveOpticalNetwork, GPON). The two optical modules have great differences in technical indexes and cannot be mixed.
The response time of the OLT-side optical module to the LOSs of signal (losoffsignal, LOS for short) detection function is required to be in ns level, and the ONU-side optical module is required to be in us level, so that the price of the OLT-side optical module is generally much higher than that of the ONU-side optical module. Meanwhile, in some prior art schemes, in order to enable the OLT-side optical module to support dual-rate signal reception, a plurality of amplifying units are used inside the OLT-side optical module to amplify signals with different rates respectively, which results in increased power consumption of the OLT-side optical module, increased circuit size and reduced signal reception sensitivity.
Disclosure of Invention
In view of this, the embodiment of the invention provides an optical signal receiving module and an optical signal receiving and transmitting device, so as to solve the problems of high manufacturing cost, higher power consumption and larger volume of an OLT side optical module supporting dual-rate signal reception in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides an optical signal receiving module, including: the photoelectric conversion unit, the signal amplification unit connected with the photoelectric conversion unit and the double-channel repeater connected with the signal amplification unit, wherein,
the photoelectric conversion unit is used for receiving the first optical signal input, converting the first optical signal into a first electric signal and outputting the first electric signal to the signal amplification unit;
the signal amplifying unit is used for amplifying the first electric signal to generate a second electric signal, wherein the second electric signal comprises a third electric signal with a first transmission rate and a fourth electric signal with a second transmission rate, and the second electric signal is output to the two-channel repeater;
the dual-channel repeater is connected with the external terminal and comprises a first transmission channel and a second transmission channel, wherein the first transmission channel is used for receiving a third electric signal, recovering and amplifying the third electric signal to generate a fifth electric signal, and outputting the fifth electric signal to the external terminal; the second transmission channel is used for receiving the fourth electric signal, recovering and amplifying the fourth electric signal to generate a sixth electric signal, and outputting the sixth electric signal to the external terminal.
Optionally, the dual-channel repeater is provided with a signal loss indication port, and is connected with an external terminal, and is used for sending a signal loss indication signal to the external terminal when the second electric signal loss is detected.
Optionally, the optical signal receiving module further includes: the control unit is respectively connected with the two-channel repeater and the signal amplification unit and used for controlling the two-channel repeater and the signal amplification unit to work according to a first preset working parameter.
Optionally, the optical signal receiving module further includes: and the power supply unit is respectively connected with the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater and the control unit and is used for supplying power to the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater and the control unit.
Optionally, the optical signal receiving module further includes: and the filter is connected with the first transmission channel and used for filtering noise in the fifth electric signal and/or connected with the second transmission channel and used for filtering noise in the sixth electric signal.
Optionally, the first transmission rate is not more than 2.5Gbps, and the filter is a low-pass filter and is connected to the first transmission channel.
Optionally, the signal amplifying unit is a limiting amplifier.
In a second aspect, an embodiment of the present invention provides an optical signal transceiver, including the optical signal receiving module, the optical signal transmitting module, and the control module;
the control module is respectively connected with the optical signal receiving module and the optical signal transmitting module and is used for controlling the optical signal receiving module and the optical signal transmitting module to work according to second preset working parameters;
the optical signal receiving module is used for receiving the first optical signal, converting the first optical signal into a first electric signal, amplifying the first electric signal, and outputting an amplified fifth electric signal and a sixth electric signal;
the optical signal transmitting module is used for receiving the seventh electric signal input, converting the seventh electric signal into a second optical signal and outputting the second optical signal.
Optionally, the optical signal transmitting module includes: the driving amplifying unit is connected with the control module, and the electro-optical conversion unit is connected with the driving amplifying unit;
the driving amplifying unit is used for amplifying the seventh electric signal to generate an eighth electric signal and outputting the eighth electric signal to the electro-optical conversion unit;
the electro-optical conversion unit is used for converting the eighth electric signal into a second optical signal and outputting the second optical signal;
the control module is used for controlling the driving amplifying unit to work according to a third preset working parameter.
Optionally, the optical signal transceiver further comprises a power supply module, which is respectively connected with the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater, the control module, the driving amplification unit and the electro-optical conversion unit, and is used for supplying power to the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater, the control module, the driving amplification unit and the electro-optical conversion unit.
The beneficial effects realized by the invention are as follows: the optical signal receiving module comprises a photoelectric conversion unit, a signal amplifying unit connected with the photoelectric conversion unit and a double-channel repeater connected with the signal amplifying unit, wherein the photoelectric conversion unit converts an input first optical signal into a first electric signal, the first electric signal is amplified by the signal amplifying unit and then is output to the double-channel repeater, and a first transmission channel of the double-channel repeater is used for recovering and amplifying a third electric signal with a first transmission rate in the second electric signal and outputting the third electric signal to an external terminal, and recovering and amplifying a fourth electric signal with a second transmission rate in the second electric signal and outputting the fourth electric signal to the external terminal. The optical signal receiving and transmitting device comprises the optical signal receiving module. Therefore, the problems of high manufacturing cost, higher power consumption, poorer signal receiving sensitivity, larger circuit volume and the like of the OLT side optical module supporting dual-rate signal receiving in the prior art can be solved, and the method is favorable for popularization and popularization of an optical communication network.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic architecture of a typical optical communication network at present;
fig. 2 shows a block diagram of an optical signal receiving module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a connection between a signal amplifying unit and a dual-channel repeater;
FIG. 4 is a schematic diagram showing another connection of a signal amplifying unit to a dual-channel repeater;
fig. 5 is a block diagram showing a structure of an optical signal receiving module according to another embodiment of the present invention;
fig. 6 shows a block diagram of an optical signal transceiver according to an embodiment of the present invention.
In the figure, a 1-optical signal transceiver; 10-an optical signal receiving module; a 100-photoelectric conversion unit; 110-a signal amplifying unit; 120-a two-channel repeater; 130-a control unit; 140-a power supply unit; 150-a filter; 20-an optical signal transmission module; 200-driving an amplifying unit; 210-an electro-optical conversion unit; 30-a control module; 40-power supply module.
Detailed Description
The conventional OLT side light module generally includes a receiving channel for implementing a photoelectric conversion function and a signal amplification function, and a transmitting channel for implementing an electro-optical conversion function and a signal amplification function. Wherein the signal amplification of the receive channel may employ a limiting amplifier.
In some prior art schemes, for example, in a 10GEPON system, it is further required that an OLT side optical module supports both transmission of signals with a transmission rate of 10Gbps and transmission of signals with a transmission rate of 1Gbps, that is, dual-rate signal transmission and reception. The receiving channel of the OLT-side optical module supporting dual-rate signal transceiving can generally adopt a plurality of limiting amplifiers to realize signal amplification and reception in parallel or in cascade.
For example, two limiting amplifiers with different bandwidths can be directly connected in parallel to amplify a signal with a transmission rate of 10Gbps and a signal with a transmission rate of 1Gbps respectively, and the solution has lower power consumption and cost, but the input signal of the limiting amplifier is divided, so that the signal integrity problem exists, the receiving sensitivity of the optical module is reduced, and the signal amplifying performance is negatively affected.
For another example, a multi-stage limiting amplifier may be used, and in the last stage, two limiting amplifiers having different bandwidths are connected in parallel to amplify a signal having a transmission rate of 10Gbps and a signal having a transmission rate of 1Gbps, respectively, and the amplification effect of this solution is improved, but the power consumption and cost are high due to the use of a plurality of limiting amplifiers in multiple stages, which also results in an increase in the circuit size of the optical module. In addition, according to the description in the background art, the response time requirement of the OLT-side optical module for the signal loss detection function is higher, generally in ns level, so that the cost of the limiting amplifier used in the OLT-side optical module is higher than that of the limiting amplifier used in the ONU-side optical module, and if a plurality of limiting amplifiers are used as in the scheme, the cost of the OLT-side optical module is obviously increased, which is very unfavorable for popularization and promotion of optical communication equipment.
In view of the above, the inventors have long studied and have made a great deal of practice to provide an optical signal receiving module and an optical signal transmitting/receiving device, which improve the existing problems.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following detailed description of the embodiments of the invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
First embodiment:
fig. 2 shows a block diagram of an optical signal receiving module 10 according to an embodiment of the present invention. Referring to fig. 2, the optical signal receiving module 10 includes a photoelectric conversion unit 100, a signal amplifying unit 110 connected to the photoelectric conversion unit 100, and a dual-channel repeater 120 connected to the signal amplifying unit 110, and the optical signal receiving module 10 is configured to receive an optical signal, convert the optical signal into an electrical signal, and amplify the signal. The optical signal receiving module 10 provided by the embodiment of the invention can be used as a receiving channel of the OLT side optical module for receiving and amplifying the uplink optical signal, and can also be used in other scenes requiring photoelectric conversion and signal amplification.
The photoelectric conversion unit 100 is configured to receive a first optical signal input, convert the first optical signal into a first electrical signal, and output the first electrical signal to the signal amplification unit 110. The photoelectric conversion unit 100 may be a light receiving element (Receiver Optical Sub-Assembly, ROSA for short) including, but not limited to, YSRA343C-LC elements employed in the present embodiment. The optical receiving component selects according to the transmission rate of the first optical signal, and selects a model supporting the corresponding transmission rate, for example, the YSRA343C-LC component can support the first optical signal with the highest transmission rate of 10 Gbps. A Trans-Impedance Amplifier (TIA) may be integrated into the optical receiving assembly to primarily amplify the photoelectrically converted signals to generate a first electrical signal output, which may be a differential signal.
The signal amplifying unit 110 is configured to amplify the first electrical signal to generate the second electrical signal, and the signal amplifying unit 110 may be a limiting amplifier (Limiting Amplifier, abbreviated as LA), including but not limited to a MAX3945 chip used in the present embodiment. The limiting amplifier is selected according to the transmission rate of the first electric signal, and a model supporting the corresponding transmission rate is selected, for example, a MAX3945 chip can support the first electric signal with the highest transmission rate of 11.3 Gbps. The second electrical signal amplified by the signal amplifying unit 110 is output to the dual-channel repeater 120, and the second electrical signal may be a differential signal.
The dual-channel repeater 120 includes a first transmission channel and a second transmission channel, and can recover, amplify, and forward two signals, respectively. The specific connection manner of the signal amplifying unit 110 and the dual-channel repeater 120 may be two manners shown in fig. 3 or fig. 4. Referring to fig. 3, the second electrical signal is a differential signal, the input of the first transmission channel is a differential signal, and the output is a differential signal; the input of the second transmission channel is a differential signal and the output is a differential signal. Referring to fig. 4, the second electrical signal is a differential signal, the input of the first transmission channel is a single-ended signal, and the output is a differential signal; the input of the second transmission channel is a single-ended signal and the output is a differential signal. It should be noted that, although the connection manner between the first transmission channel, the second transmission channel and the signal amplifying unit 110 shown in fig. 3 and fig. 4 is similar to the connection manner in the prior art in which two limiting amplifiers are directly connected in parallel after the photoelectric conversion unit 100, the second electric signal output after being amplified by the signal amplifying unit 110 already belongs to a digital logic level, and even if voltage division exists, the input logic level requirement of the dual-channel repeater 120 can be satisfied, so that the problem of poor signal receiving sensitivity caused by poor signal integrity in the prior art is not existed.
In the case where the optical signal receiving module 10 performs dual-rate signal reception, the second electrical signal includes a third electrical signal having the first transmission rate and a fourth electrical signal having the second transmission rate, and the third electrical signal and the fourth electrical signal may be time division signals, that is, the second electrical signal is either the third electrical signal or the fourth electrical signal at a specific time. When the second electrical signal is the third electrical signal, the first transmission channel of the dual-channel repeater 120 restores and amplifies the third electrical signal to generate a fifth electrical signal, and outputs the fifth electrical signal to an external terminal, such as an OLT apparatus, where the output signal of the second transmission channel is negligible. When the second electric signal is the fourth electric signal, the second transmission channel of the dual-channel repeater 120 restores and amplifies the fourth electric signal to generate a sixth electric signal, and outputs the sixth electric signal to the external terminal, and the output signal of the first transmission channel is negligible at this time.
The first transmission rate and the second transmission rate are only distinguished from each other, and actually refer to transmission rates, and for convenience of explanation, the first transmission rate and the second transmission rate are simply referred to as transmission rates when they can be clearly distinguished. For example, the third electrical signal has a transmission rate of 1Gbps, the fourth electrical signal has a transmission rate of 10Gbps, the dual-channel repeater 120 restores and amplifies the third electrical signal, and then outputs a fifth electrical signal having a transmission rate of 1Gbps from the first transmission channel and a sixth electrical signal having a transmission rate of 10Gbps from the second transmission channel. After the fifth electric signal and the sixth electric signal are output, the fifth electric signal and the sixth electric signal are processed by an external terminal and further amplified or transmitted. It is apparent that the first transmission channel and the second transmission channel are not specific to a particular channel of the two-channel repeater 120, but are merely for the purpose of distinguishing the two transmission channels in terms of names.
The dual channel repeater 120 may be a repeater chip including, but not limited to, a DS125BR111 chip employed in the present embodiment. In the prior art, repeater chips are commonly used for signal recovery and forwarding in coaxial cable or backplane systems. In the above system, because the back-plate and coaxial cable traces are up to several inches long, and some are up to 10 inches long, the high frequency signal components are very attenuated, which can cause the signal eye to close, thereby disabling the signal from being properly received by the receiving end. Therefore, in a coaxial cable or a backplane system, a repeater chip is generally used to recover the received signal and then forward the recovered signal to a receiving end. Specifically, the repeater chip firstly equalizes the received attenuated signal by adopting a continuous time linear equalization technology (Continuous Time Linear Equal ization, abbreviated as CTLE) to restore the signal quality, the equalization capacity of the repeater chip is up to 36dB, the equalized signal is amplified, and a de-emphasis technology of up to 12dB is adopted during transmission, so that a signal eye pattern is re-opened, and the signal eye pattern can be ensured to be normally received by a receiving end. Meanwhile, the repeater chip can also ensure that the signals input and output have the same level type, such as CML level.
In view of the above characteristics of the repeater chip, the inventors have found that the repeater chip can be used to recover and amplify the second electrical signal and output the signal through the first transmission channel and the second transmission channel, wherein the signal recovery is performed by using a continuous time linear equalization technique during reception, so that the quality of a signal eye pattern is improved, and the signal quality is further improved by using a de-emphasis technique during transmission. In the prior art, the limiting amplifier chip only adopts a de-emphasis technology to process signals during transmitting, and obviously, the scheme of adopting the repeater chip in the embodiment of the invention has better signal receiving sensitivity.
The optical signal receiving module 10 adopts a repeater chip to recover, amplify and forward signals, and has the following beneficial effects compared with the prior art:
in terms of performance, the repeater chip is adopted to be better than the new energy of signal receiving, and the continuous time linear equalization and de-emphasis technology is adopted to process the signals respectively in the signal receiving and transmitting process, so that the quality requirement on the second electric signal as input is not high, and larger attenuation is allowed, the output signal quality of the signal amplifying unit 110 is relaxed, in other words, when the limiting amplifier is adopted by the signal amplifying unit 110, the de-emphasis requirement on the transmission of the signal amplifying unit 110 is not obvious, and therefore, a cheaper limiting amplifier can be selected.
In terms of technical maturity, the repeater chip is quite large in the market, has mature technology, stable performance and low price, and saves manufacturing cost compared with the existing scheme adopting a plurality of limiting amplifiers.
In terms of circuit level, the volume of the repeater chip is approximately equal to that of one limiting amplifier, and compared with the prior scheme using a plurality of limiting amplifiers, the volume of the circuit is reduced; the power consumption of the repeater chip is approximately equal to that of one limiting amplifier, and compared with the prior scheme adopting a plurality of limiting amplifiers, the power consumption of the circuit is reduced. This is particularly important for Small Form factor (SFP/sfp+ (Small Form factor) optical modules, which have high size and power consumption requirements, and whose receiving channels are well suited for the optical signal receiving module 10 provided by the embodiments of the present invention.
Functionally, the limiting amplifier in the prior art can generally realize the functions of signal amplification, de-emphasis, signal loss detection and the like, and the repeater chip also has the functions. According to the foregoing description, the optical signal receiving module 10 may be used as a receiving channel of an OLT-side optical module, and the key point is that the response time of the OLT-side optical module to the signal loss detection function is in ns level, while the response time of the repeater chip DS125BR111 adopted in the embodiment may reach 35ns, which completely meets the working requirement of the OLT-side optical module, and may completely replace a plurality of limiting amplifiers in the existing scheme. Meanwhile, in the existing scheme, the limiting amplifier also needs to meet the response time requirement of the signal loss detection function, so that a type of limiting amplifier with higher price needs to be adopted, and a plurality of limiting amplifiers are used to meet the requirement of double-rate signal receiving, and the cost is high. Therefore, the repeater chip is adopted, and the manufacturing cost of the OLT side optical module is saved on the basis of not influencing the response time of the signal loss detection function. Further, since the repeater chip has satisfied the response time requirement of the loss of signal detection function, if the signal amplification unit 110 employs a limiting amplifier, a cheaper type of limiting amplifier can be employed, for example, a limiting amplifier having a response time of us-level for the loss of signal detection function used in the ONU-side optical module can be employed, and the manufacturing cost thereof can be further reduced.
In addition, it should be further understood that the optical signal receiving apparatus provided in the embodiment of the present invention may be fully applied to the case of multi-rate reception, that is, the second electrical signal includes at least two sub-signals with different transmission rates, and only the dual-channel repeater 120 needs to be replaced by a multi-channel repeater with multiple transmission channels, so that at least two multi-channel repeaters with different transmission rates can be recovered, amplified and forwarded, similar to the dual-channel repeater 120, many multi-channel repeater chips are already available in the market at present.
Optionally, a signal loss indication port is provided on the dual-channel repeater 120 to implement a signal loss detection function, where the indication port is connected to an external terminal, and when the dual-channel repeater 120 detects that the second electrical signal is lost, a signal loss indication signal is sent to the external terminal through the port. In the case where the dual channel repeater 120 is a repeater chip, the loss of signal indication port may be one or more specific pins of the chip.
Optionally, the optical signal receiving module 10 further includes a control unit 130, which is connected to the dual-channel repeater 120 and the signal amplifying unit 110, respectively, and the control unit 130 may set the working parameters of the dual-channel repeater 120 and the signal amplifying unit 110 to make them work normally, where the working parameters are referred to as a first preset working parameter in this embodiment.
Optionally, the optical signal receiving module 10 further includes a power supply unit 140 connected to the photoelectric conversion unit 100, the signal amplification unit 110, the dual-channel repeater 120, and the control unit 130, respectively, for supplying power to the photoelectric conversion unit 100, the signal amplification unit 110, the dual-channel repeater 120, and the control unit 130. The power supply unit 140 may be powered by a built-in power supply or may be powered by an external power supply.
In summary, the optical signal receiving module 10 provided in this embodiment recovers, amplifies and forwards signals with different transmission rates by using the dual-channel repeater 120, and compared with the existing optical module supporting dual-rate signal reception, the optical signal receiving module has the advantages of lower manufacturing cost, lower power consumption, smaller circuit size, simpler scheme, and capability of completely realizing the functions of the prior art scheme, and importantly, the signal receiving sensitivity is better than that of the prior art scheme.
Second embodiment:
fig. 5 shows a block diagram of another optical signal receiving module 10 according to an embodiment of the present invention. Referring to fig. 5, the second embodiment differs from the first embodiment in that a filter 150 is provided between the external terminal and the first transmission channel for filtering noise in the fifth electrical signal. The inventors have found that if the fifth electrical signal is a lower rate signal, for example, a signal having a transmission rate of 1Gbps, and the sixth signal is a higher rate signal, for example, a signal having a transmission rate of 10Gbps, the fifth signal may contain a certain high frequency signal component. In order to make the output performance of the first transmission channel better, the filter 150 may be configured as a low-pass filter to filter out the high-frequency signal component in the fifth electrical signal. The transmission rate of the lower rate signal is typically no more than 2.5Gbps. It will be appreciated that the first transmission channel and the second transmission channel may be followed by a filter 150 or other electronic device that may optimize output performance.
Third embodiment:
fig. 6 shows a block diagram of an optical signal transceiver 1 according to an embodiment of the present invention. Referring to fig. 6, the optical signal transceiver 1 includes an optical signal receiving module 10, an optical signal transmitting module 20 and a control module 30 provided in the embodiment of the present invention, where the control module 30 is connected to the optical signal receiving module 10 and the optical signal transmitting module 20 respectively, and the control module 30 may set the working parameters of the optical signal receiving module 10 and the optical signal transmitting module 20 to make them work normally, and in this embodiment, the working parameters are referred to as a second preset working parameter.
The optical signal receiving and transmitting device 1 completely realizes the receiving and transmitting function of optical signals, has higher practical value, and can be used for replacing the traditional OLT side light module, but is not limited to the application. The receiving channel of the optical signal transceiver 1 is the optical signal receiving device provided in this embodiment, and according to the foregoing description, the optical signal receiving module 10 may receive the first optical signal, convert the first optical signal into the first electrical signal, amplify the first electrical signal, and output the amplified fifth electrical signal and the amplified sixth electrical signal. The transmitting channel of the optical signal transceiver 1 is an optical signal transmitting module 20, and the optical signal transmitting module 20 is configured to receive an electrical signal, amplify the signal, and convert the signal into an optical signal. Specifically, the optical signal transmission module 20 may receive the seventh electrical signal input, convert the seventh electrical signal into the second optical signal, and output the second optical signal.
The optical signal transmission module 20 includes a driving amplification unit 200 connected to the control module 30, and an electro-optical conversion unit 210 connected to the driving amplification unit 200.
The driving amplification unit 200 is configured to amplify the seventh electrical signal to generate an eighth electrical signal, and output the eighth electrical signal to the electro-optical conversion unit 210. The driving amplifying unit 200 may drive the amplifying chip, including but not limited to the GN7152 chip adopted in the present embodiment, which may support the signal with the transmission rate of 10Gbps and the signal with the transmission rate of 1Gbps as inputs, if the optical signal receiving module 10 may also receive the signal with the transmission rate of 10Gbps and the signal with the transmission rate of 1Gbps as inputs, the optical signal transceiving apparatus 1 may implement the dual rate signal transceiving function of the OLT side module required in the 10 get pon system as mentioned in the previous example, that is, the optical signal transceiving apparatus 1 may replace the existing OLT side module. The control module 30 is connected to the driving amplifying unit 200, and may set an operation parameter of the driving amplifying unit 200, which is referred to as a third preset operation parameter operation in this embodiment.
The electro-optical conversion unit 210 is configured to receive an eighth electrical signal input, convert the eighth electrical signal into a second optical signal, and output the second optical signal to an external system. The electro-optical conversion unit 210 may be a light emitting Assembly (TOSA) including, but not limited to, the YSTA542DG-LC Assembly used in the present embodiment. The optical transmitting component selects according to the transmission rate of the eighth electric signal, and selects the model supporting the corresponding transmission rate, for example, the YSTA542DG-LC component can support the eighth electric signal with the highest transmission rate of 10 Gbps.
Optionally, the optical signal transceiver 1 further includes a power supply module 40 connected to the photoelectric conversion unit 100, the signal amplification unit 110, the dual-channel repeater 120, the control module 30, the driving amplification unit 200, and the electro-optical conversion unit 210, respectively, for supplying power to the photoelectric conversion unit 100, the signal amplification unit 110, the dual-channel repeater 120, the control module 30, the driving amplification unit 200, and the electro-optical conversion unit 210. The power supply module 40 may be powered by a built-in power supply or may be powered by an external power supply.
In summary, the optical signal transceiver 1 can completely replace the existing OLT side optical module supporting dual-rate transceiver in function, and meanwhile, because the receiving channel of the optical signal transceiver 10 provided by the embodiment of the present invention is adopted, compared with the existing OLT side optical module, the optical signal transceiver is lower in manufacturing cost, lower in power consumption, smaller in circuit size, simpler in scheme, good in signal receiving performance, and beneficial to popularization and promotion of an optical communication network.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention are clearly and completely described above in conjunction with the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Accordingly, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Claims (10)
1. An optical signal receiving module, comprising: the photoelectric conversion unit, the signal amplification unit connected with the photoelectric conversion unit and the double-channel repeater connected with the signal amplification unit, wherein,
the photoelectric conversion unit is used for receiving a first optical signal input, converting the first optical signal into a first electric signal and outputting the first electric signal to the signal amplification unit;
the signal amplifying unit is used for amplifying the first electric signal to generate a second electric signal, the second electric signal comprises a third electric signal with a first transmission rate and a fourth electric signal with a second transmission rate, and the second electric signal is output to the dual-channel repeater;
the dual-channel repeater is connected with an external terminal and comprises a first transmission channel and a second transmission channel, wherein the first transmission channel is used for receiving a third electric signal, recovering and amplifying the third electric signal to generate a fifth electric signal, and outputting the fifth electric signal to the external terminal; the second transmission channel is used for receiving a fourth electric signal, recovering and amplifying the fourth electric signal to generate a sixth electric signal, and outputting the sixth electric signal to the external terminal;
the dual-channel repeater recovers the third electrical signal, including: recovering the third electrical signal by adopting a continuous time linear equalization technology;
the dual-channel repeater recovers the fourth electrical signal, including: restoring the fourth electrical signal by adopting a continuous time linear equalization technology;
the dual-channel repeater is a repeater chip.
2. The optical signal receiving module according to claim 1, wherein a signal loss indication port is provided on the dual-channel repeater and connected to the external terminal, and is configured to send a signal loss indication signal to the external terminal when the second electrical signal loss is detected.
3. The optical signal receiving module of claim 1, wherein the optical signal receiving module further comprises: and the control unit is respectively connected with the two-channel repeater and the signal amplification unit and is used for controlling the two-channel repeater and the signal amplification unit to work according to a first preset working parameter.
4. The optical signal receiving module of claim 3, wherein the optical signal receiving module further comprises: and the power supply unit is respectively connected with the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater and the control unit and is used for supplying power to the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater and the control unit.
5. The optical signal receiving module of claim 1, wherein the optical signal receiving module further comprises: and the filter is connected with the first transmission channel and used for filtering noise in the fifth electric signal, and/or connected with the second transmission channel and used for filtering noise in the sixth electric signal.
6. The optical signal receiving module of claim 5, wherein the first transmission rate is no more than 2.5Gbps, and wherein the filter is a low pass filter and is coupled to the first transmission channel.
7. The optical signal receiving module of claim 1, wherein the signal amplifying unit is a limiting amplifier.
8. An optical signal transceiver device, comprising the optical signal receiving module, the optical signal transmitting module and the control module according to any one of claims 1 to 7;
the control module is respectively connected with the optical signal receiving module and the optical signal transmitting module and is used for controlling the optical signal receiving module and the optical signal transmitting module to work according to preset working parameters;
the optical signal receiving module is used for receiving the first optical signal, converting the first optical signal into the first electrical signal, amplifying the first electrical signal, and outputting the amplified fifth electrical signal and the amplified sixth electrical signal;
the optical signal transmitting module is used for receiving a seventh electric signal input, converting the seventh electric signal into a second optical signal and outputting the second optical signal.
9. The optical signal transmitting-receiving device of claim 8, wherein the optical signal transmitting module comprises: a driving amplifying unit connected with the control module, and an electro-optical conversion unit connected with the driving amplifying unit;
the driving amplification unit is used for amplifying the seventh electric signal to generate an eighth electric signal and outputting the eighth electric signal to the electro-optical conversion unit;
the electro-optical conversion unit is used for converting the eighth electric signal into the second optical signal and outputting the second optical signal;
the control module is used for controlling the driving amplifying unit to work according to a third preset working parameter.
10. The optical signal transceiver device of claim 9, further comprising a power supply module connected to the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater, the control module, the driving amplification unit, and the electro-optical conversion unit, respectively, for supplying power to the photoelectric conversion unit, the signal amplification unit, the dual-channel repeater, the control module, the driving amplification unit, and the electro-optical conversion unit.
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| CN111935564B (en) * | 2020-07-03 | 2022-08-19 | 华为技术有限公司 | Line card, optical module and optical line terminal |
| CN114647030B (en) * | 2022-05-19 | 2022-09-09 | 深圳市迅特通信技术股份有限公司 | Silicon-based photoelectronic receiving and transmitting integrated chip for PON OLT system |
| CN117528294A (en) * | 2022-07-30 | 2024-02-06 | 华为技术有限公司 | Signal amplifying device, device and method for receiving optical signal |
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