CN107547128B - Method and device for calibrating light-emitting power of optical module - Google Patents
Method and device for calibrating light-emitting power of optical module Download PDFInfo
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- CN107547128B CN107547128B CN201610465552.9A CN201610465552A CN107547128B CN 107547128 B CN107547128 B CN 107547128B CN 201610465552 A CN201610465552 A CN 201610465552A CN 107547128 B CN107547128 B CN 107547128B
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- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- 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
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Abstract
The invention provides a method and a device for calibrating the light-emitting power of an optical module, wherein the method comprises the following steps: adjusting the voltage of the variable optical attenuator VOA to obtain each control voltage; determining each corresponding light emitting power of the optical module under each control voltage; and calibrating the light emitting power of the light module according to each control voltage and each light emitting power. The problems that in the related technology, the adjustable range of the optical power is limited, the scaling range is small, scaling is inaccurate, and the requirement of the optical power precision cannot be met are solved, and then the effects of accurately scaling the optical power and meeting the requirement of the optical power precision are achieved.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a device for calibrating the light-emitting power of an optical module.
Background
In the debugging process of the optical module, the light output power of the optical module needs to be calibrated, so that the light output power can be accurately adjusted according to the set light power value of the system in the actual use process.
The debugging mode in the related art usually adjusts the light-emitting power of the laser to realize the calibration of different power points, but the adjustable range of the light power of the laser is limited, usually the range of +9 to +13dBm, and the range of the calibration is small, so that the calibration is inaccurate, and the precision requirement of +/-0.5dBm of the light-emitting power cannot be met.
Disclosure of Invention
The embodiment of the invention provides a method and a device for calibrating the light-emitting power of an optical module, which are used for at least solving the problems that the calibration is inaccurate and the requirement on the light-emitting power precision cannot be met due to the limited adjustable range and the small scalable range of the light power in the related technology.
According to an embodiment of the present invention, there is provided a method for scaling the light output power of an optical module, including: adjusting the voltage of a Variable Optical Attenuator (VOA for short) to obtain each control voltage; determining each corresponding light emitting power of the optical module under each control voltage; and calibrating the light emitting power of the optical module according to the control voltages and the light emitting powers.
Optionally, adjusting the voltage of the VOA comprises: initializing the voltage of the VOA to be 0V; the voltage value of the VOA is incremented by steps of a predetermined voltage value up to a peak voltage.
Optionally, the predetermined voltage value is 0.1V, and/or the peak voltage is 6V.
Optionally, scaling the light output power of the optical module according to the control voltages and the light output powers includes: generating a polynomial expression for representing a relation curve of the control voltage and the optical power according to the control voltages and the optical powers; scaling coefficients of the polynomial into the light module.
Optionally, the polynomial includes: -0.2227x3-0.7474x2+2.23 x-1.3808; wherein y represents the optical power and x represents the control voltage.
According to another embodiment of the present invention, there is provided an apparatus for scaling the light power of an optical module, including: the adjusting module is used for adjusting the voltage of the variable optical attenuator VOA to obtain each control voltage; the determining module is used for determining each corresponding light emitting power of the optical module under each control voltage; and the calibration module is used for calibrating the light emitting power of the optical module according to the control voltages and the light emitting powers.
Optionally, the adjusting module includes: the initialization unit is used for initializing the voltage of the VOA to be 0V; and the increasing unit is used for increasing the voltage value of the VOA to the peak voltage by steps of a preset voltage value.
Optionally, the predetermined voltage value is 0.1V, and/or the peak voltage is 6V.
Optionally, the scaling module comprises: a generating unit configured to generate a polynomial expression indicating a relationship curve between the control voltage and the optical power from the respective control voltages and the respective optical powers; a processing unit for scaling the coefficients of the polynomial into the light module.
Optionally, the polynomial includes: -0.2227x3-0.7474x2+2.23 x-1.3808; wherein y represents the optical power and x represents the control voltage.
According to still another embodiment of the present invention, there is also provided a storage medium. The storage medium is configured to store program codes for performing the above-described steps.
According to the invention, the VOA is added in the sending side control unit to improve the light-emitting calibration precision, and the device provides a method for calibrating the light-emitting power of the optical module according to each control voltage and each light-emitting power, so that the precision requirement of +/-0.5dBm of the light-emitting power is met. Therefore, the problems that in the related technology, the adjustable range of the optical power is limited, the adjustable range of the optical power is small, the calibration is inaccurate, and the requirement of the optical power precision cannot be met can be solved, so that the effects of accurately calibrating the optical power and meeting the requirement of the optical power precision are achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a method for scaling the optical module output power according to an embodiment of the present invention;
FIG. 2 is a flow chart of optical module optical power scaling according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an application connection according to an embodiment of the present invention;
FIG. 4 is a functional block diagram according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating the operation of optical module light output power scaling according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an optical power calibration curve and fitting polynomial according to an embodiment of the invention;
fig. 7 is a block diagram of an optical module light output power calibration apparatus according to an embodiment of the present invention;
fig. 8 is a block diagram of an adjusting module 72 in an optical module light-emitting power calibration apparatus according to an embodiment of the present invention;
fig. 9 is a block diagram of a calibration module 76 in an optical module optical power calibration apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings and embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method provided by the embodiment of the application can be executed in a mobile terminal, a computer terminal or a similar operation device. Taking the operation on a mobile terminal as an example, fig. 1 is a hardware structure block diagram of the mobile terminal of the method for calibrating the light output power of the optical module according to the embodiment of the present invention. As shown in FIG. 1, the mobile terminal 10 may include one or more (only one shown in FIG. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or programmable logic device FPGA), a memory 104 for storing data, and a transmitting device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be configured to store software programs and modules of application software, such as program instructions/modules corresponding to the method for scaling the light output power of the optical module in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, so as to implement the above method. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a method for calibrating the light output power of an optical module is provided, and fig. 2 is a flowchart for calibrating the light output power of the optical module according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202: adjusting the voltage of the variable optical attenuator VOA to obtain each control voltage;
step S204: determining each corresponding light emitting power of the optical module under each control voltage;
step S206: and calibrating the light-emitting power of the optical module according to the control voltages and the light-emitting powers.
Through the steps, the light emitting power of the light module is calibrated according to each control voltage and each light emitting power, the problems that in the related technology, the adjustable range of the light emitting power is limited, the adjustable range is small, calibration is inaccurate, and the accuracy requirement of the light emitting power cannot be met are solved, and then the effects of accurately calibrating the light emitting power and meeting the accuracy requirement of the light emitting power are achieved.
In an alternative embodiment, adjusting the voltage of the VOA includes: the voltage to initialize the VOA is 0V. In this embodiment, the adjusting manner for adjusting the voltage of the VOA may include adjusting in an increasing manner, or may include adjusting in a decreasing manner, or adjusting in another manner for adjusting the voltage. The optical module to be calibrated is installed on a calibration board, the calibration board is electrically connected with a Personal Computer (PC for short) through a network port, after the optical module normally operates, the PC starts to set VOA control voltage of the optical module to be calibrated, the initial value can be set to be 0V, the attenuation is minimum when the voltage is 0V, and the light-emitting power is maximum.
In an alternative embodiment, when adjusting the voltage of the VOA, the voltage value of the VOA may be increased by a step size of a predetermined voltage value up to a peak voltage, where the predetermined voltage value may be 0.1V (of course, other voltage values, such as 0.2V and 0.25V, may be possible), and/or the peak voltage may be 6V (of course, other peak voltages, such as 5V and 7V, may be provided). In this embodiment, it is preferable that the VOA control voltage is incremented by 0.1V step by step until the control voltage is adjusted to positive 6V.
In an optional embodiment, scaling the light output power of the optical module according to the control voltages and the light output powers includes: generating a polynomial expression for expressing a relation curve of the control voltage and the optical power according to each control voltage and each optical power; and scaling the coefficients of the polynomial into the optical module. In this embodiment, a corresponding curve may be drawn according to the determined data of each VOA voltage and output power, and a polynomial expression representing a relation curve between the VOA control voltage and the output power may be obtained by using a curve fitting method. The way of recording the VOA voltage and the output power data may be various, and the VOA voltage and the output power data may be accurately recorded.
In an alternative embodiment, the polynomial includes: -0.2227x3-0.7474x2+2.23 x-1.3808; wherein y represents the optical power, and x represents the control voltage. In this embodiment, the coefficients in the polynomial may be scaled into the optical module; the coefficients in the polynomial can be set differently according to different debugging environments or for different optical modules, so as to accurately realize the calibration of the optical module light-emitting power.
When the light emitting power of the optical module is calibrated in the production process of the optical module, the steps are the same as the debugging process, and are not repeated one by one.
The invention is illustrated below with reference to specific examples:
fig. 3 is a schematic diagram of an application connection according to an embodiment of the present invention, in which the device is connected as shown in fig. 3:
and installing the optical module to be calibrated on a regulating plate, wherein the regulating plate is electrically connected with the PC through a network port. And the PC is also provided with a debugging software, the debugging board is electrified, and after the optical module to be calibrated normally runs, the PC starts to set the VOA control voltage of the optical module to be calibrated. And recording the optical power of the output of the optical module VOA to be calibrated, which is measured by the optical power meter.
Fig. 4 is a schematic block diagram according to an embodiment of the present invention, and the following describes the scheme in the embodiment with reference to fig. 4:
the adjusting plate and the PC are respectively provided with a network port, and the PC is connected with the adjusting plate through the network port;
and installing an optical module to be calibrated on the adjusting plate. The optical module is provided with a laser, a modulator, a VOA controller and an MCU microcontroller which are electrically connected in sequence, wherein the MCU microcontroller is electrically connected with a network port on the debugging and testing board, and the VOA is electrically connected with an optical power meter;
and electrifying the adjusting and measuring plate, normally operating the optical module, and setting the VOA control voltage of the optical module to be calibrated by the PC with the initial value of 0V.
And recording the output optical power of the optical module VOA to be calibrated measured by the optical power meter.
The VOA control voltage is incremented using a step size of 0.1V until the voltage is adjusted to + 6V.
And drawing a corresponding curve according to the recorded VOA voltage and output power data, and obtaining a polynomial representing the curve.
And scaling the polynomial coefficient to the optical module, thereby finishing accurate scaling of the light emitting power.
Fig. 5 is a flowchart illustrating the operation of scaling the optical power of the optical module according to an embodiment of the present invention, and as shown in fig. 5, the flowchart includes the following steps:
step 502: installing a module to be calibrated (corresponding to the optical module) to a regulation and measurement board (or a calibration board), connecting the regulation and measurement board with a PC (personal computer) through a network port, and electrifying to run;
step 504: the adjusting and measuring board is electrified, the module to be calibrated normally operates, the PC starts to set the VOA voltage of the module to be calibrated to 0V, at the moment, the attenuation is minimum, and the light emitting power is maximum;
step 506: judging whether the VOA voltage is greater than 6V or not;
step 508: the VOA voltage is not more than 6V, and the output light power value of the module VOA to be calibrated measured by the optical power meter at the moment is recorded;
step 510: repeating steps 504 and 508 with step 0.1V until the voltage is adjusted to + 6V;
step 512: the VOA voltage is greater than 6V, a curve is drawn according to the recorded voltage and power data, and a polynomial expression representing the curve is generated through fitting;
step 514: scaling the polynomial coefficients into a module;
step 516: and finishing the calibration.
Fig. 6 is a schematic diagram of an optical power calibration curve and a fitting polynomial according to an embodiment of the present invention, and as shown in fig. 6, the optical power of the optical module is calibrated according to each control voltage and each optical power, and a relation curve representing the control voltage and the optical power is generated. A polynomial expression representing the curve is derived from the respective control voltage, the respective output power and the correlation coefficient, for example y-0.2227 x3-0.7474x2+2.23 x-1.3808; where y denotes the optical power and x denotes the control voltage.
Alternatively, the execution subject of the above steps may be a terminal such as a PC, but is not limited thereto.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Fig. 7 is a block diagram of a structure of an optical module light-emitting power calibration apparatus according to an embodiment of the present invention, as shown in fig. 7, the apparatus includes an adjusting module 72, a determining module 74, and a calibrating module 76, and the apparatus is described below:
an adjusting module 72, configured to adjust a voltage of the variable optical attenuator VOA to obtain each control voltage; a determining module 74, connected to the adjusting module 72, for determining each corresponding light output power of the optical module under each control voltage; a calibration module 76, connected to the determining module 74, for calibrating the light output power of the optical module according to the control voltages and the light output powers.
Fig. 8 is a block diagram illustrating a structure of an adjusting module 72 in an optical module optical power calibration apparatus according to an embodiment of the present invention, and as shown in fig. 8, the adjusting module 72 includes an initializing unit 82 and an incrementing unit 84, and the adjusting module 72 is described as follows:
an initializing unit 82 configured to initialize the voltage of the VOA to 0V; an increment unit 84, connected to the initialization unit 82, for incrementing the voltage value of the VOA by steps of a predetermined voltage value up to a peak voltage.
In an alternative embodiment, the predetermined voltage value is 0.1V, and/or the peak voltage value is 6V.
Fig. 9 is a block diagram of a structure of a scaling module 76 in an optical module optical power scaling apparatus according to an embodiment of the present invention, and as shown in fig. 9, the scaling module 76 includes a generating unit 92 and a processing unit 94, and the following describes the scaling module 76:
a generating unit 92 for generating a polynomial expression indicating a relationship curve between the control voltage and the optical power from the control voltages and the optical powers; a processing unit 94, connected to the generating unit 92, for scaling the coefficients of the polynomial into the optical module.
In an alternative embodiment, the polynomial includes: y-0.2227 x3-0.7474x2+2.23 x-1.3808; wherein y represents the optical power, and x represents the control voltage.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the steps.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Alternatively, in this embodiment, the processor performs the above steps according to program codes stored in the storage medium.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for calibrating light output power of an optical module is characterized by comprising the following steps:
adjusting the voltage of the variable optical attenuator VOA by the step length of a preset voltage value to obtain each control voltage;
determining each corresponding light emitting power of the optical module under each control voltage;
calibrating the light-emitting power of the optical module according to the control voltages and the light-emitting powers;
according to the control voltages and the light-emitting powers, scaling the light-emitting power of the optical module comprises:
generating a polynomial for expressing a relation curve of the control voltage and the light emitting power according to the control voltages and the light emitting powers;
scaling coefficients of the polynomial into the light module.
2. The method of claim 1, wherein adjusting the voltage of the VOA comprises:
initializing the voltage of the VOA to be 0V;
the voltage value of the VOA is incremented by steps of a predetermined voltage value up to a peak voltage.
3. The method according to claim 2, characterized in that the predetermined voltage value is 0.1V and/or the peak voltage is 6V.
4. The method of claim 1, wherein the polynomial expression comprises:
y＝-0.2227x3-0.7474x2+2.23x-1.3808；
wherein y represents the light emitting power, and x represents the control voltage.
5. An optical module light-emitting power scaling device is characterized by comprising:
the adjusting module is used for adjusting the voltage of the variable optical attenuator VOA according to the step length of the preset voltage value to obtain each control voltage;
the determining module is used for determining each corresponding light emitting power of the optical module under each control voltage;
the calibration module is used for calibrating the light emitting power of the optical module according to the control voltages and the light emitting powers;
the scaling module comprises:
a generating unit, configured to generate a polynomial expression representing a relation curve between the control voltage and the output power according to the control voltages and the output powers;
a processing unit for scaling the coefficients of the polynomial into the light module.
6. The apparatus of claim 5, wherein the adjustment module comprises:
the initialization unit is used for initializing the voltage of the VOA to be 0V;
and the increasing unit is used for increasing the voltage value of the VOA to the peak voltage by steps of a preset voltage value.
7. The apparatus of claim 6, wherein the predetermined voltage value is 0.1V, and/or the peak voltage is 6V.
8. The apparatus of claim 7, wherein the polynomial comprises:
y＝-0.2227x3-0.7474x2+2.23x-1.3808；
wherein y represents the light emitting power, and x represents the control voltage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465552.9A CN107547128B (en) | 2016-06-23 | 2016-06-23 | Method and device for calibrating light-emitting power of optical module |
| PCT/CN2017/089673 WO2017220006A1 (en) | 2016-06-23 | 2017-06-23 | Optical output power calibration method and apparatus for optical module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610465552.9A CN107547128B (en) | 2016-06-23 | 2016-06-23 | Method and device for calibrating light-emitting power of optical module |
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| CN107547128A CN107547128A (en) | 2018-01-05 |
| CN107547128B true CN107547128B (en) | 2022-06-07 |
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| CN111817782B (en) * | 2020-06-24 | 2021-10-12 | 武汉光迅科技股份有限公司 | Calibration method, device, equipment and storage medium |
| CN111814105B (en) * | 2020-06-24 | 2021-06-11 | 武汉光迅科技股份有限公司 | Calibration method, device and equipment of coherent optical module and computer readable storage medium |
| CN112367116B (en) * | 2020-10-14 | 2023-01-17 | 武汉光迅科技股份有限公司 | Calibration method and device for optical power, electronic equipment and storage medium |
| CN113541778A (en) * | 2021-07-13 | 2021-10-22 | 深圳恒朴光电科技有限公司 | Automatic testing system and method for optical module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988418A (en) * | 2005-12-23 | 2007-06-27 | 中兴通讯股份有限公司 | Method for automatic scaling light module |
| CN103188013A (en) * | 2011-12-29 | 2013-07-03 | 昂纳信息技术（深圳）有限公司 | Method and device for detecting length of single channel light wave |
| CN103607243A (en) * | 2013-09-30 | 2014-02-26 | 武汉光迅科技股份有限公司 | Method and device for mode-indiscriminate feedforward control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040019459A1 (en) * | 2002-07-29 | 2004-01-29 | Paul Dietz | Auto-characterization of optical devices |
| CN1874192B (en) * | 2005-06-02 | 2010-10-13 | 中兴通讯股份有限公司 | Device for adjusting and measuring optical module |
| US9325416B2 (en) * | 2010-07-30 | 2016-04-26 | At&T Intellectual Property I, L.P. | Network interface device for optical premises signals and networks |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988418A (en) * | 2005-12-23 | 2007-06-27 | 中兴通讯股份有限公司 | Method for automatic scaling light module |
| CN103188013A (en) * | 2011-12-29 | 2013-07-03 | 昂纳信息技术（深圳）有限公司 | Method and device for detecting length of single channel light wave |
| CN103607243A (en) * | 2013-09-30 | 2014-02-26 | 武汉光迅科技股份有限公司 | Method and device for mode-indiscriminate feedforward control |
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| WO2017220006A1 (en) | 2017-12-28 |
| CN107547128A (en) | 2018-01-05 |
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