CN107342822A - Power regulating method and device, optical communication system for optical network unit - Google Patents
Power regulating method and device, optical communication system for optical network unit Download PDFInfo
- Publication number
- CN107342822A CN107342822A CN201610284997.7A CN201610284997A CN107342822A CN 107342822 A CN107342822 A CN 107342822A CN 201610284997 A CN201610284997 A CN 201610284997A CN 107342822 A CN107342822 A CN 107342822A
- Authority
- CN
- China
- Prior art keywords
- optical
- power
- control module
- control
- instruction
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 565
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 18
- 238000004891 communication Methods 0.000 title claims abstract description 10
- 230000003321 amplification Effects 0.000 claims abstract description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 10
- 230000002238 attenuated effect Effects 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000008844 regulatory mechanism Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/2933—Signal power control considering the whole optical path
- H04B10/2939—Network aspects
-
- 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
- H04B10/50—Transmitters
- H04B10/564—Power control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention provides a kind of power regulating method for optical network unit and device, optical communication system, this method to include：Control module receives the regulating command of optical network unit, controls image intensifer and optical attenuator to work according to regulating command；For image intensifer under the control of control module, the transmitting light to optical network unit carries out luminous power amplification, and image intensifer carries out non-amplification at the same level to the flashlight in transmitting light and Crosstalk；For optical attenuator under the control of control module, the transmitting light to optical network unit carries out optical power attenuation, and optical attenuator carries out decay at the same level to the flashlight in transmitting light and Crosstalk.By the implementation of the present invention, the transmitting luminous power for the ONU that decayed using optical attenuator, it can effectively mitigate cross talk effects, be amplified using transmitting luminous power of the image intensifer to ONU, so that ONU transmitting luminous power meets the requirement of NGPON2 standards.
Description
Technical Field
The present invention relates to the field of optical communications, and in particular, to a power adjustment method and apparatus for an optical network unit, and an optical communication system.
Background
With diversification of user-side services, such as popularization of high-definition Network televisions, cloud storage cloud computing, social networks, video sharing and the like, the number of users of an operator broadband access Network is increasing day by day, the access bandwidth demand of the users is also increasing sharply, and a GPON Passive Optical Network and a 10GPON Passive Optical Network need to evolve to NG-PON2(Next-Generation Passive Optical Network Stage 2) with larger capacity, wider coverage, lower unit bandwidth cost, more convenient operation and maintenance and higher energy efficiency. In order to develop a more advanced optical access network, an FSAN (Full Service access network) working group and an ITU-T (international Telecommunication Union-Telecommunication Standardization Sector) are cooperating to establish a technical standard of an ITU-T g.989 series standard NG-PON2, which is a technical standard of a 40G-PON and is an international technical standard of a next-generation optical access network system having a high-capacity data transmission capability, a multi-Service/Full-Service provision support capability, and a flexible network operation capability.
In order to reduce uplink oob (out of band) and ooc (out of channel) crosstalk in the NGPON2 standard, an Optical Power Back (OPB) mechanism of an ONU (Optical Network Unit) is proposed, which can also implement isolation of multiple wavelength channels and solve the problem of overload of an OLT (Optical Line Terminal) receiver, whereas implementing the ONU Optical Power Back (OPB) mechanism needs to sacrifice channel Optical Power budget, the budget requirement on channel Optical Power in the NGPON2 standard is required, and if the Optical Power Back (OPB) mechanism is used in the NGPON2 system, the problem of insufficient Optical Power budget standard requirement is caused.
Therefore, how to provide a power adjustment method that can solve the standard requirement of insufficient optical power budget caused by using the existing optical power adjuster in the NGPON2 system is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a power regulation method and device for an optical network unit and an optical communication system, which aim to solve the problem that the standard requirement of insufficient optical power budget is caused by using the conventional optical power regulator in an NGPON2 system.
The invention provides a power regulation method for an optical network unit, which comprises the following steps:
the control module receives an adjusting instruction of the optical network unit and controls the optical amplifier and the optical attenuator to work according to the adjusting instruction;
the optical amplifier amplifies the optical power of the emitted light of the optical network unit under the control of the control module, and amplifies signal light and crosstalk light in the emitted light in a non-same stage;
the optical attenuator performs optical power attenuation on emitted light of the optical network unit under the control of the control module, and performs same-level attenuation on signal light and crosstalk light in the emitted light.
Further, the power adjusting method comprises the following steps: the optical network unit judges that the emitted light power meets the standard requirement, sends an adjusting instruction to the control module according to the loss of the light path and the device, and the control module generates a first control instruction to control the optical amplifier to amplify the light power.
Further, the power adjusting method comprises the following steps: and the optical network unit judges that the transmitting optical power of the optical network unit does not meet the standard requirement, sends an adjusting instruction to the control module according to the transmitting optical power and the standard requirement, and the optical path and the device loss, and the control module generates a second control instruction to control the optical amplifier to amplify the optical power.
Further, the power adjusting method comprises the following steps: the optical network unit judges that crosstalk light in the emitted light does not meet the standard requirement, and then sends an adjusting instruction to the control module according to the standard requirement, and the control module generates a third control instruction and controls the optical attenuator to attenuate the optical power of the emitted light; and the optical network unit judges that the optical power of the signal light in the attenuated emitted light does not meet the standard requirement, and then sends an adjusting instruction to the control module according to the attenuated optical power, the optical path and the device loss, and the control module generates a fourth control instruction to control the optical amplifier to amplify the optical power.
Further, the power adjusting method comprises the following steps: the control module determines an attenuation value of the optical attenuator according to the adjusting instruction, judges whether the attenuation value exceeds an adjusting range of the optical attenuator, and generates a fifth control instruction according to the adjusting range, the optical path and the device loss of the optical attenuator if the attenuation value exceeds the adjusting range of the optical attenuator so as to adjust the amplified optical power of the optical amplifier.
Further, the power adjusting method comprises the following steps: the control module judges whether the optical amplifier needs to be turned on or turned off according to the adjusting instruction, if the optical amplifier needs to be turned on, the control module generates a turn-on instruction, turns on the optical amplifier, and if the optical amplifier needs to be turned off, the control module generates a turn-off instruction, and turns off the optical amplifier.
Further, the power adjusting method further includes, after the optical amplifier is turned off: and generating an attenuation instruction, and controlling the attenuation value of the optical attenuator to be adjusted to the maximum value.
The invention provides a power regulating device for an optical network unit, which comprises: the optical network unit is used for outputting the emitted light, and comprises a control module, an optical amplifier and an optical attenuator; wherein,
the control module is used for receiving an adjusting instruction of the optical network unit and controlling the optical amplifier and the optical attenuator to work according to the adjusting instruction;
the optical amplifier is used for carrying out optical power amplification on the emitted light of the optical network unit under the control of the control module, and the optical amplifier carries out non-same-stage amplification on signal light and crosstalk light in the emitted light;
and the optical attenuator is used for performing optical power attenuation on the emitted light of the optical network unit under the control of the control module, and performing same-level attenuation on the signal light and the crosstalk light in the emitted light.
Further, the optical network unit is configured to determine that the emitted optical power meets a standard requirement, send an adjustment instruction to the control module according to the optical path and the device loss, and the control module is configured to generate a first control instruction and control the optical amplifier to amplify the optical power.
Further, the optical network unit is further configured to determine that the emitted optical power of the optical network unit does not meet the standard requirement, and send an adjustment instruction to the control module according to the emitted optical power and the standard requirement, and the optical path and the device loss, where the control module is configured to generate a second control instruction and control the optical amplifier to amplify the optical power.
Further, the optical network unit is configured to determine that crosstalk light in the emitted light does not meet a standard requirement, send an adjustment instruction to the control module according to the standard requirement, where the control module is configured to generate a third control instruction and control the optical attenuator to perform optical power attenuation on the emitted light; the optical network unit is further configured to determine that optical power of the signal light in the attenuated emitted light does not meet a standard requirement, send an adjustment instruction to the control module according to the attenuated optical power, the optical path, and the device loss, and the control module is configured to generate a fourth control instruction and control the optical amplifier to amplify the optical power.
Further, the control module is further configured to determine an attenuation value of the optical attenuator according to the adjustment instruction, determine whether the attenuation value exceeds the adjustment range of the optical attenuator, and generate a fifth control instruction according to the adjustment range of the optical attenuator, the optical path, and the device loss if the attenuation value exceeds the adjustment range of the optical attenuator, so as to adjust the amplified optical power of the optical amplifier.
Further, the control module is used for turning on or turning off the optical amplifier according to the adjusting instruction, generating an opening instruction if the optical amplifier needs to be turned on, turning on the optical amplifier, and generating a closing instruction if the optical amplifier needs to be turned off, and turning off the optical amplifier.
Further, the control module is used for generating an attenuation instruction after the optical amplifier is turned off, and controlling the attenuation value of the optical attenuator to be adjusted to the maximum value.
The present invention provides an optical communication system, comprising: the optical network unit in the power regulating device comprises an optical transmitting component, and the optical transmitting component is connected with an optical amplifier and/or an optical attenuator of the power regulating device.
Further, the control module, the optical amplifier and the optical attenuator in the power adjusting device are disposed outside the optical transmitting component in a discrete form, or are integrated within the optical transmitting component in an integrated form.
The invention has the beneficial effects that:
the invention provides a power regulating device, which comprises a control circuit, an optical attenuator and an optical amplifier, wherein the control circuit receives a regulating instruction sent by an ONU, and controls an optical attenuator and an optical amplifier according to the instruction, the optical attenuator is used for attenuating the transmitting optical power of the ONU, this attenuation attenuates both the in-channel light intensity and the out-of-channel (OOB, OOC) light intensity (i.e., crosstalk), which effectively mitigates the crosstalk effects, but at the same time, the light intensity in the channel may not meet the requirement of the optical power budget, and the function of the optical amplifier includes amplifying the optical power emitted from the ONU, therefore, the transmission optical power of the ONU meets the requirement of the NGPON2 standard, the attenuation of the optical attenuator for reducing the channel external crosstalk to the light intensity in the channel can be compensated to meet the requirement of the optical power budget, and the problem that the optical power budget is insufficient due to the use of the existing optical power regulator in the NGPON2 system is solved. Furthermore, because the wavelength drift problem is introduced by turning on and off the emission laser, the original mode of turning on and off the ONU emission laser is replaced by the mode of turning on and off the optical amplifier, so that the ONU transmitter is always in a stable output state, and the wavelength drift problem caused by turning on and off the ONU uplink transmitter can be effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of a power conditioning device according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a power adjustment method according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of an arrangement of a power conditioning device according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of an arrangement of a power conditioning device according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of a power adjustment method according to a fifth 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.
The invention will now be further explained by means of embodiments in conjunction with the accompanying drawings.
The first embodiment:
fig. 1 is a schematic structural diagram of a power conditioning device according to a first embodiment of the present invention, and as can be seen from fig. 1, in this embodiment, the power conditioning device 1 according to the present invention includes: the control module 11, the optical amplifier 12 and the optical attenuator 13, further comprise an optical network unit 14 for outputting the emitted light, wherein,
the control module 11 is configured to receive an adjustment instruction of the optical network unit 14, and control the optical amplifier 12 and the optical attenuator 13 to operate according to the adjustment instruction;
an optical amplifier 12, configured to perform optical power amplification on the emitted light of the optical network unit 14 under the control of the control module 11, where the optical amplifier 12 performs non-identical amplification on the signal light and the crosstalk light in the emitted light;
the optical attenuator 13 is configured to attenuate optical power of the emitted light of the optical network unit 14 under the control of the control module 11, and the optical attenuator 13 performs same-order attenuation on the signal light and the crosstalk light in the emitted light.
In some embodiments, the optical network unit 14 in the above embodiments is configured to determine that the optical power of the emitted light meets a standard requirement, send an adjustment instruction to the control module 11 according to the optical path and the device loss, and the control module 11 is configured to generate a first control instruction and control the optical amplifier 12 to amplify the optical power. In practical application, the onu 14 determines whether the emitted optical power meets the standard requirement, and generates a first determination result, and correspondingly, the adjustment instruction includes the first determination result that the onu determines whether the emitted optical power meets the standard requirement; if the first determination result indicates that the optical power of the optical network unit meets the standard requirement, the control module 11 is configured to generate a first control instruction according to the optical path and the device loss, and control the optical amplifier 12 to amplify the optical power. In practical application, the optical network unit determines whether the emitted optical power of the optical network unit meets a standard requirement for the emitted optical power, generates a first determination result according to the determination result, sends the first determination result to the control module 11 through the adjustment instruction, sends the adjustment instruction if the emitted optical power of the optical network unit meets the standard requirement, and the first determination result indicates that the emitted optical power of the optical network unit meets the standard requirement, the control module 11 is configured to generate a first control instruction according to a light path and device loss, and control the optical amplifier to amplify the optical power, for example, the optical network unit gives a light path and device loss N, and the control module 11 controls the optical amplifier to amplify the optical power Ndb.
In some embodiments, the optical network unit 14 in the above embodiments is further configured to determine that the emitted optical power of the optical network unit does not meet the standard requirement, and send an adjustment instruction to the control module 11 according to the emitted optical power of the optical network unit, the standard requirement, the optical path, and the device loss, where the control module is configured to generate a second control instruction to control the optical amplifier 12 to amplify the optical power. If the first judgment result shows that the transmitting optical power of the optical network unit does not meet the standard requirement, the adjusting instruction further comprises the transmitting optical power of the optical network unit and the standard requirement; the control module 11 is further configured to generate a second control command according to the optical power and the standard requirement of the onu, and the loss of the optical path and the device, and control the optical amplifier 12 to amplify the optical power. In practical application, the optical network unit determines whether the emitted optical power of the optical network unit meets a standard requirement for the emitted optical power, generates a first determination result according to the determination result, sends the first determination result to the control module 11 through the adjustment instruction, and if the first determination result is that the emitted optical power of the optical network unit does not meet the standard requirement, the adjustment instruction further includes the emitted optical power and the standard requirement of the optical network unit, the control module 11 is further configured to generate a second control instruction according to the emitted optical power and the standard requirement of the optical network unit, and the optical path and the device loss, and control the optical amplifier 12 to amplify the optical power, for example, the optical path and the device loss Ndb are given by the optical network unit, the optical network unit determines that the emitted optical power differs from the standard Mdb, and the control module 11 controls the optical amplifier to amplify the optical power.
In some embodiments, the optical network unit 14 in the above embodiments is configured to determine that crosstalk light in the emitted light does not meet a standard requirement, send an adjustment instruction to the control module 11 according to the standard requirement, where the control module 11 is configured to generate a third control instruction, and control the optical attenuator 13 to perform optical power attenuation on the emitted light; the optical network unit 14 is further configured to determine that optical power of the signal light in the attenuated emitted light does not meet a standard requirement, send an adjustment instruction to the control module 11 according to the attenuated optical power, the optical path, and the device loss, where the control module 11 is configured to generate a fourth control instruction and control the optical amplifier 12 to amplify the optical power. In practical application, the optical network unit 14 determines whether the crosstalk light in the emitted light meets the standard requirement, and generates a second determination result, and correspondingly, the adjustment instruction includes the second determination result that the optical network unit determines whether the crosstalk light in the emitted light meets the standard requirement; if the second determination result is that the crosstalk light in the emitted light meets the standard requirement, attenuation is not needed, and if the second determination result is that the crosstalk light in the emitted light does not meet the standard requirement, the adjustment instruction further includes the standard requirement of the crosstalk light in the emitted light, and the control module 11 is configured to generate a third control instruction according to the standard requirement of the crosstalk light, and control the optical attenuator 13 to perform optical power attenuation on the emitted light. In practical application, the optical network unit determines that crosstalk light in the emitted light does not meet a standard requirement, sends an adjustment instruction to the control module 11, and the control module 11 generates a third control instruction to control the optical attenuator to perform optical power attenuation on the emitted light. In practical application, after attenuation, the optical network unit further needs to determine whether the optical power of the signal light in the attenuated emitted light meets the standard requirement, and according to a corresponding determination result, sends an adjustment instruction to the control module 11, and the control module 11 generates a fourth control instruction to control the optical amplifier to amplify the optical power. For example, the optical network unit determines a standard difference T between crosstalk light in the emitted light and optical power, the control module 11 generates a third control command, controls the optical attenuator to perform optical power attenuation T on the emitted light, and then the optical network unit determines a standard difference Q between optical power of signal light in the attenuated emitted light and optical path and device loss N, and the control module 11 generates a fourth control command, and controls the optical amplifier to amplify optical power Q + N.
In some embodiments, the control module 11 in the above embodiments is further configured to determine an attenuation value of the optical attenuator 13 according to the adjustment command, determine whether the attenuation value exceeds an adjustment range of the optical attenuator 13, and generate a fifth control command according to the adjustment range of the optical attenuator, the optical path, and the device loss if the attenuation value exceeds the adjustment range of the optical attenuator, so as to adjust the amplified optical power of the optical amplifier 12. In practical application, after determining an attenuation value of the optical attenuator, the optical network unit determines whether the attenuation value exceeds an adjustment range of the optical attenuator, and if the attenuation value exceeds the adjustment range of the optical attenuator, the optical network unit sends an adjustment instruction to the control module 11 according to the adjustment range, the optical path, and the device loss of the optical attenuator to generate a fifth control instruction, and the control module 11 controls the optical amplifier to adjust the optical power.
In some embodiments, the control module 11 in the above embodiments is configured to turn on or turn off the optical amplifier according to an adjustment instruction given by the optical network unit, generate an on instruction if the optical amplifier needs to be turned on, turn on the optical amplifier, and generate a off instruction if the optical amplifier needs to be turned off, and turn off the optical amplifier.
In some embodiments, the control module 11 in the above embodiments is further configured to generate an attenuation instruction after the optical amplifier is turned off, and control the attenuation value of the optical attenuator to be adjusted to the maximum value.
Correspondingly, the present invention provides an optical communication system, comprising: the optical network unit in the power regulating device comprises an optical transmitting component, and the optical transmitting component is connected with an optical amplifier and/or an optical attenuator of the power regulating device.
In some embodiments, the control module, the optical amplifier and the optical attenuator in the power regulating device are disposed outside the optical transmission component in a discrete form, or are integrated within the optical transmission component in an integrated form.
Second embodiment:
fig. 2 is a flowchart of a power adjustment method according to a second embodiment of the present invention, and as can be seen from fig. 2, in this embodiment, the power adjustment method according to the present invention includes the following steps:
s201: the control module receives an adjusting instruction of the optical network unit and controls the optical amplifier and the optical attenuator to work according to the adjusting instruction;
s202: the optical amplifier amplifies the optical power of the emitted light of the optical network unit under the control of the control module, and amplifies signal light and crosstalk light in the emitted light in a non-same stage;
s203: the optical attenuator performs optical power attenuation on emitted light of the optical network unit under the control of the control module, and performs same-level attenuation on signal light and crosstalk light in the emitted light.
In some embodiments, the power adjusting method in the above embodiments includes: the optical network unit judges that the emitted light power meets the standard requirement, sends an adjusting instruction to the control module according to the loss of the light path and the device, and the control module generates a first control instruction to control the optical amplifier to amplify the light power.
In some embodiments, the power adjusting method in the above embodiments includes: and the optical network unit judges that the transmitting optical power of the optical network unit does not meet the standard requirement, sends an adjusting instruction to the control module according to the transmitting optical power and the standard requirement, and the optical path and the device loss, and the control module generates a second control instruction to control the optical amplifier to amplify the optical power.
In some embodiments, the power adjusting method in the above embodiments includes: the optical network unit judges that crosstalk light in the emitted light does not meet the standard requirement, and then sends an adjusting instruction to the control module according to the standard requirement, and the control module generates a third control instruction and controls the optical attenuator to attenuate the optical power of the emitted light; and the optical network unit judges that the optical power of the signal light in the attenuated emitted light does not meet the standard requirement, and then sends an adjusting instruction to the control module according to the attenuated optical power, the optical path and the device loss, and the control module generates a fourth control instruction to control the optical amplifier to amplify the optical power.
In some embodiments, the power adjusting method in the above embodiments includes: the control module determines an attenuation value of the optical attenuator according to the adjusting instruction, judges whether the attenuation value exceeds an adjusting range of the optical attenuator, and generates a fifth control instruction according to the adjusting range, the optical path and the device loss of the optical attenuator if the attenuation value exceeds the adjusting range of the optical attenuator so as to adjust the amplified optical power of the optical amplifier.
In some embodiments, the power adjusting method in the above embodiments includes: the control module judges whether the optical amplifier needs to be turned on or turned off according to the adjusting instruction, if the optical amplifier needs to be turned on, the control module generates a turn-on instruction, turns on the optical amplifier, and if the optical amplifier needs to be turned off, the control module generates a turn-off instruction, and turns off the optical amplifier.
In some embodiments, the power adjusting method in the above embodiments further includes, after turning off the optical amplifier: and generating an attenuation instruction, and controlling the attenuation value of the optical attenuator to be adjusted to the maximum value.
The present invention will now be further explained with reference to specific application scenarios.
In order to reduce uplink OOB and OOC crosstalk in the NGPON2 standard, an optical power adjustment mechanism of an ONU is proposed, which can also implement isolation of multiple wavelength channels and solve the problem of OLT receiver overload. However, there is no effective solution for implementing the ONU optical power adjustment mechanism at the expense of the channel optical power budget, which is required by the channel optical power budget in the NGPON2 standard. The present embodiment provides a method and an apparatus for implementing an ONU optical power adjustment mechanism to solve the problem of insufficient optical power budget caused by implementing ONU optical power adjustment. In addition, the device can also solve the wavelength drift problem caused by the turn-on of the uplink transmitter of the NGPON2, and can enable the transmitter to meet the requirement of turning off the optical power in the NGPON2 standard when the transmitter is turned off.
The patent provides a method and a device for realizing an ONU power regulation mechanism in an NGPON2 system. The apparatus includes a control circuit, a VOA (Variable Optical Attenuator, a kind of Optical Attenuator), and an OA (Optical Amplifier). The control circuit is used for receiving the adjusting instruction sent by the ONU and controlling the variable optical attenuator and the optical amplifier according to the instruction. The variable optical attenuator is used to attenuate the optical power emitted from the ONU, and this attenuation attenuates both the in-channel optical intensity and the out-of-channel (OOB, OOC) optical intensity, i.e. crosstalk, so that the crosstalk effect can be effectively mitigated, but at the same time, the in-channel optical intensity may not meet the requirement of the optical power budget. The functions of the optical amplifier include: amplifying the transmission optical power of the ONU so that the transmission optical power of the ONU meets the requirement of the NGPON2 standard; the attenuation of the variable optical attenuator for the external crosstalk of the channel to the light intensity in the channel can be compensated to be reduced, so that the requirement of the optical power budget is met; because the wavelength drift problem is introduced by turning on and off the emission laser, the original mode of turning on and off the ONU emission laser is replaced by the mode of turning on and off the optical amplifier, so that the ONU transmitter is always in a stable output state, and the wavelength drift problem caused by turning on and off the ONU uplink transmitter can be effectively solved. It should be noted that the optical amplifier used in this embodiment amplifies signal light and crosstalk light in different orders, and the amplification order of the signal light is several tens of times or more of that of the crosstalk light.
A method for realizing an ONU power regulation mechanism in an NGPON2 system comprises the following steps: and the control circuit receives the adjusting instruction sent by the ONU and adjusts and controls the variable optical attenuator and the optical amplifier according to the instruction. The specific control mode is as follows:
the control circuit firstly controls the optical amplifier to amplify the optical power emitted by the ONU by a certain value, and if the optical power emitted by the ONU cannot meet the standard requirement of the NGPON2 standard, the optical amplifier can be amplified to meet the standard requirement. If the transmitting optical power of the ONU has met the NGPON2 standard requirements, amplification by the optical amplifier: the optical amplifier can be controlled to be turned on and off to replace the turning on and off of the ONU transmitting laser, so that the wavelength drift problem caused by the turning on of the ONU uplink transmitter can be effectively solved.
The control circuit controls the variable optical attenuator to attenuate optical power emitted by the ONU by a certain value, so that the out-of-channel (OOB, OOC) optical intensity, namely crosstalk, meets the requirement of the NGPON2 standard, the influence of attenuation on the optical power budget is compensated by the optical amplifier, and if the value of attenuation required exceeds the adjusting range of the variable optical attenuator, the adjusting range of the variable optical attenuator can be indirectly increased by adjusting the optical amplifier. In addition, when the wavelength drift problem is solved, after the optical amplifier is turned off, the control circuit controls the variable optical attenuator to be adjusted to the maximum, so that the turn-off optical power can be prevented from exceeding the standard of the NGPON 2.
The patent provides a method and a device for realizing an ONU power regulation mechanism in an NGPON2 system, and the device comprises a control circuit, a variable optical attenuator and an optical amplifier. Preferably, the device can be integrated in the ONU optical module, which can make the implementation of the ONU power adjusting mechanism more flexible. The following embodiments are possible depending on the device implementation structure:
the third embodiment:
as shown in fig. 3, the ONU power adjusting device is disposed outside the optical module optical emission component in a discrete manner, in which oa (optical amplifier) is an optical amplifier, and voa (variable optical attenuator) is a variable optical attenuator. In the figure, the control module 11 is connected to both OA12a and VOA13a, preferably, the optical module optical transmitting module is connected to optical amplifier OA12a of the power adjusting device, and the optical transmitting module of the optical network unit may also be connected to optical attenuator VOA13a of the power adjusting device, in this case, OA12a and VOA13a may adopt independent devices to implement corresponding functions.
The fourth embodiment:
as shown in fig. 4, the ONU power adjusting device is integrated into the Optical module Optical transmitting module in an integrated form, which includes, but is not limited to, spatial Optical coupling, PIC (power integrated circuit) hybrid integration, monolithic integration, etc., where ld (laser diode) is a laser diode, oa (Optical amplifier) is an Optical amplifier, and voa (variable Optical attenuator) is a variable Optical attenuator. In the figure, the control module 11 is connected to both OA12b and VOA13b, preferably, the laser diode LD in the optical module light emitting module is connected to the optical amplifier OA12b of the power adjusting device, and the optical emitting module of the optical network unit may also be connected to the optical attenuator VOA13b of the power adjusting device, in this case, OA12b and VOA13b need to adopt circuit elements to implement their respective functions independently or cooperatively.
Fifth embodiment:
now, the present invention is further described in different application scenarios, as shown in fig. 5, in this embodiment, the ONU power adjusting method provided by the present invention includes:
s501: the control circuit receives a regulating instruction from the ONU;
s502: the control circuit judges whether the adjusting instruction is an enabling instruction, if so, the step S503 is executed, and if not, the step S507 is executed;
in this embodiment, the enabling instruction refers to an instruction to turn on or turn off the optical amplifier, and the ONU power adjusting device solves the wavelength drift problem by turning on or turning off the optical amplifier; specifically, when the emission laser of the ONU needs to be turned on and off, the ONU sends an adjustment instruction to the power adjustment device, and the control circuit controls the optical amplifier to be turned on and off correspondingly after receiving the adjustment instruction sent by the ONU, so as to solve the wavelength drift problem caused by turning on the ONU uplink transmitter. After the control circuit turns off the optical amplifier, the ONU sends an adjusting instruction to the power adjusting device, and the control circuit controls the variable optical attenuator to be adjusted to the maximum after receiving the adjusting instruction sent by the ONU so as to prevent the turn-off optical power from exceeding the standard of the NGPON 2.
S503: the control circuit judges whether the instruction is an instruction for turning off the optical amplifier, if so, the step S504 is executed, and if not, the step S506 is executed;
s504: the control circuit turns off the optical amplifier;
s505: the control circuit controls the variable optical attenuator to be adjusted to the maximum;
s506: the control circuit turns on the optical amplifier;
s507: the ONU judges whether the emitted optical power meets the standard requirement of the NGPON2, if so, the control circuit executes the step S508, and if not, the control circuit executes the step S509;
in practical application, the ONU power adjusting device is configured to reduce uplink oob (out of band) and ooc (out of channel) crosstalk, when the transmission optical power of the ONU can meet the requirement of the NGPON2 standard, the control circuit only needs to compensate the loss caused by the optical path and the device, and when the transmission optical power of the ONU cannot meet the requirement of the NGPON2 standard, the control circuit needs to amplify the transmission optical power of the ONU so as to meet the standard requirement, and at the same time, needs to compensate the loss caused by the optical path and the device;
s508: the control circuit controls the optical amplifier to amplify the emitted optical power so as to compensate the loss caused by the optical path and the device;
after receiving the adjustment instruction sent by the ONU, the optical amplifier is controlled to amplify the transmitting optical power by 5% so as to compensate the loss caused by the optical path and the device.
S509: the control circuit controls the optical amplifier to amplify the emitted optical power so as to meet the requirement of the NGPON2 standard and compensate the loss caused by optical paths and devices;
if the transmitting optical power of the ONU cannot meet the requirement of the NGPON2 standard, the ONU sends an adjusting instruction to the power adjusting device, and the control circuit controls the optical amplifier to amplify the transmitting optical power after receiving the adjusting instruction sent by the ONU, so that the transmitting optical power meets the standard requirement. The optical amplifier is then controlled to amplify the emitted optical power to compensate for losses in the optical path and devices.
In order to enable the out-of-channel (OOB, OOC) light intensity, i.e. crosstalk, to meet the requirement of the NGPON2 standard, the control module needs to control the variable optical attenuator to attenuate the optical power emitted by the ONU by a corresponding value so as to meet the requirement of the NGPON2 standard.
S510: the ONU judges whether the crosstalk meets the standard requirement of the NGPON2, if so, the process is ended, and if not, the step S511 is executed;
s511: the control circuit controls the variable optical attenuator to attenuate a corresponding value to the ONU transmitting optical power, so that the out-of-channel (OOB, OOC) light intensity, namely crosstalk, meets the requirement of the NGPON2 standard;
s512: the ONU judges whether the light intensity in the channel can meet the requirement of transmitting the optical power in the NGPON2 standard after the variable optical attenuator attenuates the light intensity outside the channel (OOB, OOC), namely crosstalk. If not, go to step S513, if yes, the process is ended;
s513: the ONU sends an adjusting instruction to the power adjusting device, and the control circuit controls the optical amplifier to amplify the transmitting optical power after receiving the adjusting instruction sent by the ONU so as to meet the requirement of the transmitting optical power in the NGPON2 standard.
In summary, the implementation of the present invention has at least the following advantages:
the invention provides an adjusting device comprising a control circuit, a variable optical attenuator and an optical amplifier, wherein the control circuit receives an adjusting instruction sent by an ONU and controls the variable optical attenuator and the optical amplifier according to the instruction, the variable optical attenuator is used to attenuate the optical power emitted from the ONU, and this attenuation will simultaneously attenuate the optical intensity in the channel and the optical intensity out of the channel (OOB, OOC) (i.e. crosstalk), so that the crosstalk effect can be effectively mitigated, but at the same time, the light intensity in the channel may not meet the requirement of the optical power budget, and the function of the optical amplifier includes amplifying the optical power emitted from the ONU, therefore, the transmission optical power of the ONU meets the requirement of the NGPON2 standard, the attenuation of the variable optical attenuator for the crosstalk outside the channel to the light intensity in the channel can be compensated to be reduced, the requirement of the optical power budget is met, and the problem that the optical power budget is insufficient due to the use of the existing optical power regulator in the NGPON2 system is solved.
Furthermore, because the wavelength drift problem is introduced by turning on and off the emission laser, the original mode of turning on and off the ONU emission laser is replaced by the mode of turning on and off the optical amplifier, so that the ONU transmitter is always in a stable output state, and the wavelength drift problem caused by turning on and off the ONU uplink transmitter can be effectively solved.
The above embodiments are only examples of the present invention, and are not intended to limit the present invention in any way, and any simple modification, equivalent change, combination or modification made by the technical essence of the present invention to the above embodiments still fall within the protection scope of the technical solution of the present invention.
Claims (16)
1. A method for power regulation of an optical network unit, comprising:
the control module receives an adjusting instruction of the optical network unit and controls the optical amplifier and the optical attenuator to work according to the adjusting instruction;
the optical amplifier amplifies optical power of emitted light of the optical network unit under the control of the control module, and the optical amplifier amplifies signal light and crosstalk light in the emitted light in a non-same stage;
the optical attenuator performs optical power attenuation on the emitted light of the optical network unit under the control of the control module, and performs same-level attenuation on signal light and crosstalk light in the emitted light.
2. The power regulation method of claim 1, comprising: and the optical network unit judges that the emitted optical power meets the standard requirement, sends an adjusting instruction to the control module according to the optical path and the device loss, and the control module generates a first control instruction to control the optical amplifier to amplify the optical power.
3. The power regulation method of claim 2, further comprising: and the optical network unit judges that the transmitting optical power of the optical network unit does not meet the standard requirement, sends an adjusting instruction to the control module according to the transmitting optical power and the standard requirement, and the optical path and the device loss, and the control module generates a second control instruction to control the optical amplifier to amplify the optical power.
4. The power regulation method of claim 1, further comprising: the optical network unit sends an adjusting instruction to the control module according to the standard requirement when judging that the crosstalk light in the emitted light does not meet the standard requirement, and the control module generates a third control instruction to control the optical attenuator to attenuate the optical power of the emitted light; and the optical network unit judges that the optical power of the signal light in the attenuated emitted light does not meet the standard requirement, and sends an adjusting instruction to the control module according to the attenuated optical power, the optical path and the device loss, and the control module generates a fourth control instruction to control the optical amplifier to amplify the optical power.
5. The power regulation method of claim 1, further comprising: the control module determines an attenuation value of the optical attenuator according to the adjusting instruction, judges whether the attenuation value exceeds an adjusting range of the optical attenuator, and generates a fifth control instruction according to the adjusting range, the optical path and the device loss of the optical attenuator and adjusts the amplified optical power of the optical amplifier if the attenuation value exceeds the adjusting range of the optical attenuator.
6. The power regulation method of any one of claims 1 to 5, further comprising: the control module judges whether the optical amplifier needs to be turned on or turned off according to the adjusting instruction, if the optical amplifier needs to be turned on, an opening instruction is generated, the optical amplifier is turned on, and if the optical amplifier needs to be turned off, a closing instruction is generated, and the optical amplifier is turned off.
7. The power regulation method of claim 6, further comprising, after turning off the optical amplifier: and generating an attenuation instruction, and controlling the attenuation value of the optical attenuator to be adjusted to the maximum value.
8. A power regulating device for an optical network unit, comprising: the optical network unit is used for outputting the emitted light, and comprises a control module, an optical amplifier and an optical attenuator; wherein,
the control module is used for receiving an adjusting instruction of the optical network unit and controlling the optical amplifier and the optical attenuator to work according to the adjusting instruction;
the optical amplifier is configured to perform optical power amplification on the emitted light of the optical network unit under the control of the control module, and the optical amplifier performs non-sibling amplification on signal light and crosstalk light in the emitted light;
the optical attenuator is configured to perform optical power attenuation on the emitted light of the optical network unit under the control of the control module, and perform same-order attenuation on the signal light and the crosstalk light in the emitted light.
9. The power adjustment apparatus according to claim 8, wherein the onu is configured to determine that the optical power of the optical network unit meets a standard requirement, and send an adjustment command to the control module according to the optical path and the device loss, and the control module is configured to generate a first control command and control the optical amplifier to amplify the optical power.
10. The power adjustment apparatus according to claim 9, wherein the onu is further configured to determine that the transmitted optical power of the onu does not meet a standard requirement, and send an adjustment command to the control module according to the transmitted optical power of the onu, the standard requirement, an optical path and a device loss, and the control module is configured to generate a second control command and control the optical amplifier to amplify the optical power.
11. The power adjustment apparatus according to claim 8, wherein the optical network unit is configured to send an adjustment instruction to the control module according to a standard requirement if the crosstalk light in the emitted light does not meet the standard requirement, and the control module is configured to generate a third control instruction to control the optical attenuator to perform optical power attenuation on the emitted light; the optical network unit is further configured to determine that optical power of the signal light in the attenuated emitted light does not meet a standard requirement, send an adjustment instruction to the control module according to the attenuated optical power, the optical path, and the device loss, where the control module is configured to generate a fourth control instruction and control the optical amplifier to amplify the optical power.
12. The power adjustment apparatus according to claim 8, wherein the control module is configured to determine an attenuation value of the optical attenuator according to an adjustment command, determine whether the attenuation value exceeds an adjustment range of the optical attenuator, and generate a fifth control command according to the adjustment range of the optical attenuator, an optical path and a device loss if the attenuation value exceeds the adjustment range of the optical attenuator, so as to adjust the amplified optical power of the optical amplifier.
13. The power regulator according to any one of claims 8 to 12, wherein the control module is further configured to determine whether an optical amplifier needs to be turned on or off according to a regulation instruction, generate an on instruction if the optical amplifier needs to be turned on, turn on the optical amplifier, and generate a off instruction if the optical amplifier needs to be turned off, turn off the optical amplifier.
14. The power regulating device according to claim 13, wherein the control module is further configured to generate an attenuation instruction to control the attenuation value of the optical attenuator to be adjusted to a maximum value after the optical amplifier is turned off.
15. An optical communication system comprising a power regulating device according to any one of claims 8 to 14, wherein the optical network unit in the power regulating device comprises an optical transmitting component, and the optical transmitting component is connected with an optical amplifier and/or an optical attenuator of the power regulating device.
16. The optical communication system of claim 15, wherein the control module, the optical amplifier and the optical attenuator in the power conditioning device are disposed outside the optical transmit module in a discrete form or integrated within the optical transmit module in an integrated form.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284997.7A CN107342822A (en) | 2016-04-29 | 2016-04-29 | Power regulating method and device, optical communication system for optical network unit |
| PCT/CN2016/089916 WO2017185531A1 (en) | 2016-04-29 | 2016-07-13 | Power backoff method and device for optical network unit, and optical communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284997.7A CN107342822A (en) | 2016-04-29 | 2016-04-29 | Power regulating method and device, optical communication system for optical network unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342822A true CN107342822A (en) | 2017-11-10 |
Family
ID=60160662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610284997.7A Pending CN107342822A (en) | 2016-04-29 | 2016-04-29 | Power regulating method and device, optical communication system for optical network unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107342822A (en) |
| WO (1) | WO2017185531A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401885A (en) * | 2019-08-19 | 2019-11-01 | 深圳市双翼科技股份有限公司 | A kind of optical power control system in PON communication |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265240C (en) * | 2002-07-18 | 2006-07-19 | 华为技术有限公司 | Low-noise variable-gain optical amplifier |
| JP4633664B2 (en) * | 2006-03-24 | 2011-02-16 | 富士通株式会社 | Optical switch system |
| CN102307068B (en) * | 2011-06-24 | 2015-04-01 | 武汉光迅科技股份有限公司 | Method for locking Raman gains of target and Raman OFA (optical fiber amplifier) |
| CN103512599B (en) * | 2013-09-27 | 2017-01-04 | 武汉理工大学 | Vast capacity fiber grating sensing system based on optical amplification repeater |
-
2016
- 2016-04-29 CN CN201610284997.7A patent/CN107342822A/en active Pending
- 2016-07-13 WO PCT/CN2016/089916 patent/WO2017185531A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401885A (en) * | 2019-08-19 | 2019-11-01 | 深圳市双翼科技股份有限公司 | A kind of optical power control system in PON communication |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017185531A1 (en) | 2017-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6429966B1 (en) | Multistage optical amplifier with Raman and EDFA stages | |
| EP2472744B1 (en) | Method and apparatus for amplifying and dynamically adjusting an optical signal | |
| US6690508B2 (en) | Control system and method for an optical amplifier | |
| US20160173202A1 (en) | Adaptive Noise Loading in Optical Communication Networks | |
| WO2019003833A1 (en) | Optical receiver module, optical reception method, station-side device, pon system, and optical filter | |
| Suzuki et al. | Amplified gigabit PON systems | |
| CN110431765B (en) | Transmission device, reception device, optical transmission system, optical power control method | |
| JP5066591B2 (en) | Bidirectional optical amplifier, PON system, and communication method for PON system | |
| US20040017603A1 (en) | Optical amplifier controller | |
| CN107342822A (en) | Power regulating method and device, optical communication system for optical network unit | |
| US7844185B2 (en) | Method and apparatus for suppressing optical surge in optical burst switching network | |
| JP5532354B2 (en) | PON optical transmission system, station side apparatus, and optical communication method | |
| US9509430B2 (en) | Apparatus for optical signal amplification | |
| US20120243076A1 (en) | Method, apparatus, and system for amplifying a burst optical signal | |
| US8908265B2 (en) | Optical fiber amplifier comprising an embedded filter and a control method with improved feedforward control performance | |
| CN110445544B (en) | Gain control method and system for optical transmission, optical amplifier and optical module | |
| JP2012015866A (en) | Bidirectional optical amplifier, pon system using same, and communication method | |
| EP3000195B1 (en) | Adaptive network optimization in an optical communications system | |
| JP6734826B2 (en) | Pumping light power control device, burst light amplification system and burst light amplification method | |
| Rasztovits-Wiech et al. | Bidirectional EDFA for future extra large passive optical networks | |
| Senoo et al. | Wavelength router for energy efficient photonic aggregation with large-scale λ-tunable WDM/TDM-PON | |
| JP4138551B2 (en) | Optical transmission system using Raman amplifier | |
| Fujiwara | Gain-controlled optical amplifier technologies for long-reach and high-splitting-ratio PON systems | |
| JP5920194B2 (en) | Optical transmission apparatus and gain control method | |
| JP2001060917A (en) | Wavelength multiplex light transmitter and light amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171110 |