CN111049576B - LOS (LOSs of line) alarm method for optical module - Google Patents
LOS (LOSs of line) alarm method for optical module Download PDFInfo
- Publication number
- CN111049576B CN111049576B CN201911377862.5A CN201911377862A CN111049576B CN 111049576 B CN111049576 B CN 111049576B CN 201911377862 A CN201911377862 A CN 201911377862A CN 111049576 B CN111049576 B CN 111049576B
- Authority
- CN
- China
- Prior art keywords
- signal
- los
- judgment
- value
- optical
- 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.)
- Active
Links
Images
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
- 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
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
Abstract
The invention discloses a method and a system for LOS alarm of an optical module, wherein the method comprises the following steps: and controlling to detect an LOS judgment signal output by the CDR chip as a first judgment signal, controlling to collect the received optical power on the optical receiver and convert the received optical power into an LOS judgment signal as a second judgment signal, controlling to judge the first judgment signal and the second judgment signal, and outputting an LOS alarm when a judgment result corresponding to the first judgment signal and/or the second judgment signal is that the signal is lost. The invention detects the LOS judgment signal output by the CDR chip, collects the receiving optical power on the optical receiver, converts the receiving optical power into the LOS judgment signal through the comparator, and then carries out comprehensive judgment by utilizing the two LOS judgment signals, thereby improving the judgment accuracy of the LOS signal of the optical module, reducing the occurrence of the condition that the optical module does not alarm and improving the reliability of the LOS alarm function of the optical module.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a method and a system for LOS alarm of an optical module.
Background
CDR: clock Data Recovery, which shapes the voltage signal generated by the receiving device and improves the signal quality.
LOS: LOSS OF SIGNAL, used to detect optical SIGNAL LOSS.
ROSA: recording Optical-Spectrum Analyzer, Optical receiver, mainly uses the conversion of Optical signal into electric signal (O/E conversion), and the main performance index is sensitivity (Sen).
MCU: the Microcontroller Unit, a micro control Unit, is a chip-level computer formed by integrating a CPU, an RAM, a ROM, a timer, and various I/O interfaces of the computer on one chip with the appearance and development of large-scale integrated circuits, and performs different combination control for different application occasions.
Gold finger: golden yellow conductive contact of the memory bank is used for transmitting signals.
In an optical module, LOS alarm is usually implemented by using LOS signal of a CDR chip, specifically, the following two common ways are used: one is to connect the LOS alarm pin of the CDR chip to the gold finger of the optical module outputting the alarm signal, as shown in fig. 1; the other is to connect the LOS alarm pin of the CDR chip to the MCU, and then to the gold finger of the optical module that outputs the LOS alarm signal after the simple logic determination by the MCU, as shown in fig. 2. However, when the optical module is in some special situations, for example, when the module is at a high temperature or a low temperature, the LOS alarm is inevitably not triggered in both of the above two ways. In addition, some manufacturers of ROSA optical receivers fail to report the LOS signal due to high noise at high or low temperatures, so that the LOS alarm is not triggered.
In a word, the existing optical module has the defect of no trigger when the LOS alarm is realized by using the LOS judgment signal of the CDR chip, so that the reliability of the alarm function is low.
Disclosure of Invention
The invention provides a method and a system for optical module LOS alarm, which reduce the occurrence of the condition that an optical module does not alarm and improve the reliability of the LOS alarm function of the optical module by improving the judgment accuracy of the LOS judgment signal of the optical module.
One aspect of the invention relates to a method for optical module LOS alarm, which comprises the following steps: and controlling to detect an LOS judgment signal output by the CDR chip as a first judgment signal, controlling to collect the received optical power on the optical receiver and convert the received optical power into an LOS judgment signal as a second judgment signal, controlling to judge the first judgment signal and the second judgment signal, and outputting an LOS alarm when a judgment result corresponding to the first judgment signal and/or the second judgment signal is that the signal is lost.
Further, the received optical power is converted into the LOS judgment signal through a comparator.
Further, the received optical power is obtained by data acquisition of the optical receiver through a sampling module.
Further, the sampling module converts the collected received optical power from a current signal to a voltage signal.
Further, the receiving optical power is converted into the LOS judgment signal by a comparator, including: setting a first comparison value and a second comparison value, the first comparison value being smaller than the second comparison value, comparing the received optical power with the first comparison value and the second comparison value,
if the value of the received optical power is smaller than the first comparison value, the judgment result corresponding to the second judgment signal is signal loss;
if the value of the received optical power is greater than the second comparison value, the judgment result corresponding to the second judgment signal is that the signal is not lost;
if the received optical power value is between the first comparison value and the second comparison value, the determination result corresponding to the second determination signal maintains the previous determination result.
Further, the receiving optical power is converted into the LOS judgment signal by a comparator, including:
the comparator is a hysteresis comparator;
a large threshold value and a small threshold value are arranged in the hysteresis comparator, the received optical power is input into the hysteresis comparator,
if the value of the received optical power is decreased from large to small and is smaller than a small threshold value, the hysteresis comparator outputs a corresponding judgment result which is a second judgment signal of signal loss, otherwise, the previous output signal is kept;
if the value of the received optical power is changed from small to large and is greater than a large threshold value, the hysteresis comparator outputs a corresponding judgment result as a second judgment signal that the signal is not lost, otherwise, the previous output signal is kept.
Another aspect of the invention relates to a system for optical module LOS alarm, the system comprising an optical receiver, a CDR chip, an LOS alarm judger, a sampling module and a comparator, wherein,
an optical receiver for converting an optical signal input to the optical receiver into a current signal and a voltage signal;
the CDR chip is used for processing the voltage signal input by the optical receiver and outputting a first LOS judgment signal;
the sampling module is used for collecting current signals input by the light receiver and converting the current signals into voltage signals;
the comparator is used for processing the voltage signal input by the sampling module and outputting a second LOS judgment signal;
and the LOS alarm judger is used for processing a first LOS judgment signal input by the CDR chip and a second LOS judgment signal input by the hysteresis comparator, and outputting an LOS alarm if the judgment result corresponding to the first LOS judgment signal and/or the second LOS judgment signal is signal LOSs.
Further, still include MCU, the comparator with LOS reports an emergency and asks for help or increased vigilance judger all locates on the MCU.
Further, still include MCU, the comparator is established to hysteresis comparator, LOS reports to the police and reports to the police judgement ware and locates on the MCU, hysteresis comparator locates outside the MCU.
Further, the sampling module is set as a sampling resistor.
The invention brings the following beneficial effects:
the invention detects the LOS judgment signal output by the CDR chip, collects the receiving optical power on the optical receiver, converts the receiving optical power into the LOS judgment signal through the comparator, and then carries out comprehensive judgment by utilizing the two LOS judgment signals, thereby improving the judgment accuracy of the LOS judgment signal of the optical module, reducing the occurrence of the condition that the optical module does not alarm and improving the reliability of the LOS alarm function of the optical module.
Drawings
FIG. 1 is a schematic diagram of one implementation manner of implementing LOS alarm by using LOS signal of CDR chip in optical module in the prior art;
FIG. 2 is a schematic diagram of another implementation manner of implementing LOS alarm by using LOS signal of CDR chip in optical module in the prior art;
FIG. 3 is a schematic diagram of a LOS alarm system of an optical module according to the present invention;
FIG. 4 is a schematic structural diagram of an optical module LOS alarm system according to the present invention, in which a comparator is implemented in software;
FIG. 5 is a schematic structural diagram of an optical module LOS alarm system according to the present invention, in which a comparator is implemented by hardware;
FIG. 6 is a schematic structural diagram of a sampling module of an optical module LOS alarm system according to the present invention;
FIG. 7 is a schematic structural diagram of a CDR chip of an optical module LOS alarm system according to the present invention;
fig. 8 is a circuit diagram of a hysteresis comparator of an optical module LOS alarm system according to the present invention.
Fig. 9 is a flowchart of a method for an LOS alarm of an optical module according to the present invention.
Detailed description of the preferred embodiments
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The embodiment provides a method for optical module LOS alarm, which is used for improving the accuracy of judging an optical module LOS judgment signal, so as to reduce the occurrence of the condition that the optical module LOS alarm is not triggered, and improve the reliability of the optical module LOS alarm function.
As shown in fig. 1-2, fig. 1 and 2 illustrate a method for detecting an LOS determination signal by an optical module in the prior art, where fig. 1 illustrates that an LOS alarm pin of a CDR chip is connected to a gold finger of the optical module; FIG. 2 shows that the LOS alarm pin of the CDR chip is connected to the gold finger of the optical module after passing through the logic array of the MCU.
It can be understood that the type of CDR chip has the LOS detection circuit 1022 built therein, which can detect whether the optical signal of the CDR chip is lost and output the detection result through the CDR chip in the form of an LOS judgment signal, where the LOS judgment signal includes a high level and a low level, and when the detection result of the LOS judgment signal detection module is that the optical signal is lost, the LOS alarm pin outputs a high-level LOS judgment signal; when the LOS judgment signal detection module detects that the optical signal is not lost, the LOS alarm pin outputs a low-level LOS judgment signal. When the optical module is in some special conditions, for example, when the module is at a high temperature or a low temperature, the LOS alarm pin of the CDR chip has a condition that the LOS judgment signal is not output, so that the LOS alarm cannot be avoided without triggering.
As shown in fig. 3 to 9, based on this, the present invention provides a method for an LOS alarm of an optical module, where the method includes: and controlling to detect an LOS judgment signal output by the CDR chip as a first judgment signal, controlling to collect the received optical power on the optical receiver and convert the received optical power into an LOS judgment signal as a second judgment signal, controlling to judge the first judgment signal and the second judgment signal, and outputting an LOS alarm when a judgment result corresponding to the first judgment signal and/or the second judgment signal is that the signal is lost.
The method is based on the LOS judgment signal output by the CDR chip, introduces the received optical power on the optical receiver to be converted into the LOS judgment signal, and utilizes the LOS judgment signals at the two positions to carry out comprehensive judgment. When the CDR chip does not output the LOS judgment signal due to the reason, a second judgment signal is output as the LOS alarm judgment. When any one of the judgment results respectively corresponding to the first judgment signal and the second judgment signal is signal LOSs, the comprehensive judgment result is signal LOSs, and the optical module outputs an LOS alarm; when the judgment results respectively corresponding to the first judgment signal and the second judgment signal are that the signals are not lost, the comprehensive judgment result is that the signals are not lost, and at the moment, the optical module does not output the LOS alarm.
Specifically, in the method, the received optical power is converted into the LOS determination signal by a comparator. Because the received optical power collected from the optical receiver is a natural number value, the value is greater than a certain value under the condition that the optical receiver normally receives an optical signal; in the case where the optical receiver fails to receive the optical signal (i.e., the optical signal is lost), the collected received optical power value is smaller than a certain value or even approaches zero. The LOS determination signal only includes two states, namely a LOSs of signal state and a non-LOSs of signal state. Therefore, the received optical power is compared by a comparator, if the value of the received optical power is greater than a certain value, the corresponding value is converted into 0, and at this time, 0 is one of the states of the LOS judgment signal and represents a state that the signal is not lost; if the value of the received optical power is smaller than a certain value, the corresponding value is converted into 1, and at this time, 1 is another state of the LOS determination signal, which represents a signal LOSs state.
In the method, the comparator can be realized by adopting a software mode, and can also be realized by adopting a hardware hysteresis comparator.
When the comparator is implemented in a software manner, the comparator includes setting a first comparison value ADC1 and a second comparison value ADC2, where the first comparison value ADC1 is smaller than the second comparison value ADC2, and if the received optical power value ADC is smaller than the first comparison value ADC1, the determination result corresponding to the second determination signal is signal LOSs, that is, the comparator converts the received optical power value ADC into an LOS determination signal 1; if the received optical power value ADC is greater than the second comparison value ADC2, the second determination signal corresponds to a determination result that the signal is not lost, that is, the comparator converts the received optical power value ADC into an LOS determination signal 0; if the received optical power value ADC is between the first comparison value ADC1 and the second comparison value ADC2, the determination result corresponding to the second determination signal maintains the previous determination result. It should be noted that, because the optical signal has smaller fluctuation in the transmission process, there is smaller deviation in collecting the received optical power, and in order to reduce the error influence judgment result caused by the fluctuation of the optical transmission, a first comparison value ADC1 and a second comparison value ADC2 are introduced, where the first comparison value ADC1 is an losa (los assert) value, that is, the received optical power at the optical receiver is less than the ADC1, which indicates that the optical signal is lost; the second comparison value ADC2 is a losd (los deassert) value, i.e. the received optical power of the optical receiver is greater than ADC2, which indicates that the optical signal is not lost. If the collected received optical power value is between the ADC1 and the ADC2, it may be caused by optical transmission fluctuation, and the actual received optical power may be smaller than the first comparison value ADC1 or larger than the second comparison value ADC2, so to avoid a determination error, the LOS determination signal output at this time is kept the same as the LOS determination signal output at the previous determination.
It is understood that the difference between the first comparison value ADC1 and the second comparison value ADC2 should be consistent with the fluctuation range of the optical signal during transmission, and in one specific embodiment, the difference between the first comparison value and the second comparison value is 3-5 dB.
When the comparator is implemented by a hardware hysteresis comparator, a large threshold value U + and a small threshold value U-are arranged in the hysteresis comparator, the received optical power is input into the hysteresis comparator, if the received optical power is changed from large to small, and when the received optical power is smaller than the small threshold value U-, the hysteresis comparator outputs a corresponding judgment result which is a second judgment signal with signal loss, otherwise, the previous output signal is kept; if the value of the received optical power is changed from small to large and is greater than a large threshold value U +, the hysteresis comparator outputs a second judgment signal with a corresponding judgment result that the signal is not lost, otherwise, the previous output signal is kept.
It can be understood that the hysteresis comparator has two threshold values, and when the input changes in a single direction, the output jumps only once. When the input value is changed from big to small, a small threshold value U-is corresponded; when the input value is changed from small to big, the input value corresponds to a big threshold value U +. It should be noted that, the difference between the large threshold value U + and the small threshold value U-is referred to as a threshold width Δ U, and if the variation value of the input value is between the threshold widths Δ U, the output is kept as the original output. When the output state is switched once, the output value is stable and unchanged as long as the jump of the input value does not exceed the value of delta U. Due to the above principle of the hardware hysteretic comparator, the hysteretic comparator can be free from the influence caused by signal fluctuation.
Similarly, the threshold width Δ U should be consistent with the fluctuation range of the optical signal during transmission, and in one specific embodiment, the threshold width Δ U is set to 3-5 dB.
In addition, the received optical power is obtained by data acquisition of the optical receiver through the sampling module. For example, there is a sampling module RSSI (received Signal Strength indicator) that is commonly used in the market at present and is specially used for collecting the received optical power of the optical receiver, and this common RSSI sampling module is only used for collecting and reporting the received optical power of the optical receiver that is simply used as an optical module.
Furthermore, the sampling module converts the collected received optical power from a current signal to a voltage signal. Specifically, an optical signal received by the optical receiver is converted into a current signal and a voltage signal respectively, wherein the voltage signal is transmitted to the CDR chip, the current signal is output through a pin for measuring optical power on the optical receiver, the sampling module is connected to the pin for measuring optical power on the optical receiver, receives the current signal representing the received optical power, and then converts the current signal into the voltage signal for output.
In addition, the present embodiment also provides a system for optical module LOS alarm, which includes an optical receiver ROSA101, a CDR chip 102, an LOS alarm determiner 105, a sampling module 103, and a comparator 104, wherein,
an optical receiver 101 for converting a received optical signal into a current signal and a voltage signal;
a CDR chip 102, configured to process a voltage signal input by the optical receiver 101 and output a first LOS determination signal;
the sampling module 103 is configured to collect a current signal input by the optical receiver 101 and convert the current signal into a voltage signal;
the comparator 104 is configured to process the voltage signal input by the sampling module 103 and output a second LOS determination signal;
and an LOS alarm determiner 105, configured to process the first LOS determination signal input by the CDR chip 102 and the second LOS determination signal input by the comparator 104, and output an LOS alarm if a determination result corresponding to the first LOS determination signal and/or the second LOS determination signal is a signal LOSs.
The optical receiver 101 is configured to receive an optical signal by an optical module, and convert the received optical signal into a current signal and a voltage signal; the voltage signal is input to the CDR chip 102, and the current signal is output to the sampling module 103 through a pin of the optical receiver 101 for optical power measurement.
The CDR chip 102 receives the voltage signal from the optical receiver 101 and shapes the voltage signal to improve signal quality. In addition, the CDR chip 102 also has an LOS judgment signal reporting function, which is used to monitor whether the signal LOSs occurs during the operation of the CDR chip 102. Specifically, the CDR chip 102 includes a voltage shaping circuit 1021, a signal input end of the CDR chip 102 is connected to a signal output end of the optical receiver 101, and the voltage shaping circuit 1021 is configured to shape a received voltage signal and filter an interference signal. Meanwhile, the LOS detection circuit 1022 of the CDR chip detects the circuit signal, and if a signal LOSs occurs, outputs a first LOS determination signal, and the CDR chip 102 is provided with a pin for outputting the first LOS determination signal.
The sampling module 103 is connected to a pin for measuring optical power on the optical receiver 101, and obtains an instantaneous receiving optical power value of the optical receiver 101 by collecting the current signal on the optical receiver 101. Specifically, in this embodiment, the sampling module 103 is a sampling resistor, the sampling module 103 includes a voltage conversion circuit 1031, a filter circuit 1032 and a sampling circuit 1033, which are connected in sequence, a signal input terminal of the voltage conversion circuit 1031 is connected to a signal output terminal of the optical receiver 101, the voltage conversion circuit 1031 is configured to collect a current signal output by the optical receiver 101, and converts the current signal into a voltage signal, a signal input terminal of the filter circuit 1032 is connected to a signal output terminal of the voltage converting circuit 1031, the filter circuit 1032 is configured to filter the voltage signal output by the voltage converting circuit 1031, so that the voltage signal input to the sampling circuit 1033 is a clean and stable voltage signal, the signal output terminal of the sampling circuit 1033 is connected to the signal input terminal of the hysteresis comparator 104, and the sampling circuit 1033 collects the voltage value of the optical signal output by the filter circuit 1032 and inputs the voltage value to the hysteresis comparator 104.
In one embodiment, the comparator 104 is a software-implemented comparing module 1041, and the comparing module 1041 and the LOS alert determiner 105 are both disposed on an MCU 100. The comparing module 1041 performs logic operation according to the voltage signal input by the sampling module 103, thereby generating and outputting a second LOS determination signal. When the hysteresis comparator 104 is implemented by software, the comparator 104 may be integrated with the LOS alert determiner 105 in the MCU100, and the comparator 104 is a comparing module 1041 disposed in the MCU 100.
The operation logic of the comparison module 1041 is: the comparator 104 reads the sampling ADC value of the sampling circuit and compares the sampling ADC value with a first comparison value ADC1 and a second comparison value ADC2 preset in the comparator 104, and when the ADC sampling value is smaller than the ADC1, outputs a judgment signal that the second LOS judgment signal is a high level (1); when the ADC sampling value is larger than the ADC2, outputting a second LOS judgment signal which is a low-level (0) judgment signal; when the ADC sampling value is between the ADC1 and the ADC2, the second LOS determination signal is output as the determination signal.
In another embodiment, the comparator 104 is a hardware implemented hysteresis comparator 1042, the LOS alarm determiner 105 is disposed on an MCU100, and the hysteresis comparator 1042 is disposed outside the MCU 100. When the comparator 104 is implemented by hardware, the hysteresis comparator 1042 is a hardware comparator installed outside the MCU105, i.e. an independent electronic device. The hysteresis comparator 1042 has two threshold values, and when the input changes in a single direction, the output jumps once. When the input value is changed from big to small, the corresponding small threshold value U-is compared with the small threshold value U-, when the input value is changed to be equal to the small threshold value U-, a high level (1) is output, and then the output value is continuously output to be the high level (1) regardless of the continuous change of the input value; when the input value is changed from small to large, the corresponding large threshold value U + is compared with the input value, when the input value is changed to be equal to the large threshold value U +, a low level (0) is output, and then the output value is continuously output as the low level (0) regardless of the continuous increase of the input value.
The MCU100 includes a logic device, and the first LOS determination signal input by the CDR chip 102 and the second LOS determination signal input by the hysteresis comparator 104 complete logic operations through the logic device in the MCU100, such as an or gate. Specifically, when the first LOS judgment signal is at a high level (1) and the second LOS judgment signal is at a high level (1), the logic device outputs the operation result as a high level (1); when the first LOS judgment signal is at a high level (1) and the second LOS judgment signal is at a low level (0), the logic device outputs an operation result as a high level (1); when the first LOS judgment signal is at a low level (0) and the second LOS judgment signal is at a high level (1), the logic device outputs an operation result as the high level (1); when the first LOS determination signal is at a low level (0) and the second LOS determination signal is at a low level (0), the logic device outputs the operation result as a low level (0).
The MCU100 is further provided with an LOS alarm output terminal 106 for outputting a judgment result, and the LOS alarm output terminal 106 is used to connect LOS alarm devices, such as a signal lamp, a buzzer, a loudspeaker, and the like. The LOS alert output 106 may be, for example, a gold finger. When the logic device outputs the operation result as high level (1), the MCU100 outputs the LOS alarm, and the alarm device connected to the LOS alarm output terminal 106 generates an alarm signal, such as signal lamp flashing, buzzer sounding, and speaker broadcasting quotation voice.
The system utilizes the two paths of judgment signals to comprehensively judge the LOS judgment signal of the optical module, and has high judgment accuracy on the LOS judgment signal. One of the judgment signals is a current signal output by the optical receiver 101, and the current signal is the most original and unprocessed signal, and has high accuracy and sensitivity. The system is also provided with a comparator 104, and the influence of unstable output level caused by fluctuation change in the optical transmission process on the judgment accuracy can be reduced through the logic operation of the comparator 104.
In summary, the LOS judgment signal output by the CDR chip 102 is detected, the received optical power on the optical receiver 101 is collected, the received optical power is converted into the LOS judgment signal through the hysteresis comparator 104, and then the two LOS judgment signals are used for comprehensive judgment, so that the accuracy of judging the LOS judgment signal of the optical module is improved, the occurrence of the situation that the optical module does not alarm is reduced, and the reliability of the LOS alarm function of the optical module is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A method of optical module LOS alarm, the method comprising: controlling and detecting an LOS judgment signal output by a CDR chip as a first judgment signal, controlling and collecting the received optical power on an optical receiver and converting the received optical power into an LOS judgment signal as a second judgment signal, controlling and judging the first judgment signal and the second judgment signal, and outputting an LOS alarm when a judgment result corresponding to the first judgment signal and/or the second judgment signal is that the signal is lost;
the receiving optical power is converted into the LOS judgment signal through a comparator, and the method comprises the following steps: the comparator is a hysteresis comparator; a large threshold value and a small threshold value are arranged in the hysteresis comparator, and the receiving optical power is input into the hysteresis comparator; if the value of the received optical power is decreased from large to small and is smaller than a small threshold value, the hysteresis comparator outputs a corresponding judgment result which is a second judgment signal of signal loss, otherwise, the previous output signal is kept; if the value of the received optical power is changed from small to large and is greater than a large threshold value, the hysteresis comparator outputs a corresponding judgment result to be a second judgment signal that the signal is not lost, otherwise, the previous output signal is kept; further comprising: setting a first comparison value and a second comparison value, wherein the first comparison value is smaller than the second comparison value, and comparing the received optical power with the first comparison value and the second comparison value; if the value of the received optical power is smaller than the first comparison value, the judgment result corresponding to the second judgment signal is signal loss; if the value of the received optical power is greater than the second comparison value, the judgment result corresponding to the second judgment signal is that the signal is not lost; if the received optical power value is between the first comparison value and the second comparison value, the determination result corresponding to the second determination signal maintains the previous determination result.
2. The method for optical module LOS alarm according to claim 1, wherein the received optical power is obtained by data collection of an optical receiver through a sampling module.
3. The method of optical module LOS alarm according to claim 1, wherein a sampling module converts the collected received optical power from a current signal to a voltage signal.
4. The method for optical module LOS alarm according to claim 1, wherein the system comprises an optical receiver, a CDR chip, an LOS alarm determiner, a sampling module and a comparator, wherein the optical receiver is configured to receive an optical signal and convert the received optical signal into a current signal and a voltage signal; the CDR chip is used for processing the voltage signal input by the optical receiver and outputting a first LOS judgment signal; the sampling module is used for collecting current signals input by the light receiver and converting the current signals into voltage signals; the comparator is used for processing the voltage signal input by the sampling module and outputting a second LOS judgment signal; and the LOS alarm judger is used for processing a first LOS judgment signal input by the CDR chip and a second LOS judgment signal input by the hysteresis comparator, and outputting an LOS alarm if the judgment result corresponding to the first LOS judgment signal and/or the second LOS judgment signal is signal LOSs.
5. The method for optical module LOS alert of claim 4, further comprising an MCU, wherein the comparator and the LOS alert determiner are both disposed on the MCU.
6. The method for optical module LOS alarm according to claim 4, further comprising an MCU, wherein the comparator is configured as a hysteresis comparator, the LOS alarm determiner is configured on the MCU, and the hysteresis comparator is configured outside the MCU.
7. The method for optical module LOS alert of claim 4, wherein the sampling module is set as a sampling resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377862.5A CN111049576B (en) | 2019-12-27 | 2019-12-27 | LOS (LOSs of line) alarm method for optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377862.5A CN111049576B (en) | 2019-12-27 | 2019-12-27 | LOS (LOSs of line) alarm method for optical module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111049576A CN111049576A (en) | 2020-04-21 |
| CN111049576B true CN111049576B (en) | 2022-03-11 |
Family
ID=70239178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911377862.5A Active CN111049576B (en) | 2019-12-27 | 2019-12-27 | LOS (LOSs of line) alarm method for optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111049576B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872709B (en) * | 2021-10-14 | 2023-10-24 | 上海橙科微电子科技有限公司 | System for continuously monitoring presence or absence of high-speed signal |
| CN115664528B (en) * | 2022-12-27 | 2023-04-28 | 绍兴中科通信设备有限公司 | Optical module, system and method for realizing ultrafast squelch function |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116267A (en) * | 2005-02-08 | 2008-01-30 | 富士通株式会社 | Optical input stoppage testing apparatus |
| US7385995B2 (en) * | 2003-01-13 | 2008-06-10 | Brooktree Broadband Holding, Inc. | System and method for dynamic bandwidth allocation on PONs |
| CN105305191A (en) * | 2015-10-29 | 2016-02-03 | 成都新易盛通信技术股份有限公司 | 100G cable module based on CFP2 interface |
| CN106452575A (en) * | 2016-11-01 | 2017-02-22 | 武汉恒泰通技术有限公司 | SFP+ optical module having signal loss alarm function |
| CN108271088A (en) * | 2018-01-12 | 2018-07-10 | 青岛海信宽带多媒体技术有限公司 | The CDR bandwidth adjusting methods and device of optical module |
| CN108365888A (en) * | 2018-02-01 | 2018-08-03 | 四川泰瑞创通讯技术股份有限公司 | The device of test light module performance |
| US10164706B2 (en) * | 2017-02-23 | 2018-12-25 | Cisco Technology, Inc. | Multi-identity optics modules |
| CN109217922A (en) * | 2018-09-25 | 2019-01-15 | 东莞铭普光磁股份有限公司 | A kind of method and device that optical module reports Received Loss Of Signal to alert |
| CN109981167A (en) * | 2019-02-19 | 2019-07-05 | 深圳市欧博凯科技有限公司 | A kind of reception signal alarm suitable for optical module with remove warning value testing algorithm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136875B (en) * | 2010-08-05 | 2014-08-20 | 华为技术有限公司 | Method, equipment and system for automatically configuring wavelength of adjustable light module |
-
2019
- 2019-12-27 CN CN201911377862.5A patent/CN111049576B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7385995B2 (en) * | 2003-01-13 | 2008-06-10 | Brooktree Broadband Holding, Inc. | System and method for dynamic bandwidth allocation on PONs |
| CN101116267A (en) * | 2005-02-08 | 2008-01-30 | 富士通株式会社 | Optical input stoppage testing apparatus |
| CN105305191A (en) * | 2015-10-29 | 2016-02-03 | 成都新易盛通信技术股份有限公司 | 100G cable module based on CFP2 interface |
| CN106452575A (en) * | 2016-11-01 | 2017-02-22 | 武汉恒泰通技术有限公司 | SFP+ optical module having signal loss alarm function |
| US10164706B2 (en) * | 2017-02-23 | 2018-12-25 | Cisco Technology, Inc. | Multi-identity optics modules |
| CN108271088A (en) * | 2018-01-12 | 2018-07-10 | 青岛海信宽带多媒体技术有限公司 | The CDR bandwidth adjusting methods and device of optical module |
| CN108365888A (en) * | 2018-02-01 | 2018-08-03 | 四川泰瑞创通讯技术股份有限公司 | The device of test light module performance |
| CN109217922A (en) * | 2018-09-25 | 2019-01-15 | 东莞铭普光磁股份有限公司 | A kind of method and device that optical module reports Received Loss Of Signal to alert |
| CN109981167A (en) * | 2019-02-19 | 2019-07-05 | 深圳市欧博凯科技有限公司 | A kind of reception signal alarm suitable for optical module with remove warning value testing algorithm |
Non-Patent Citations (2)
| Title |
|---|
| Modeling and experimental analysis of contamination effects on lens-based optic modules;Christine Chen;《 2009 Conference on Optical Fiber Communication - incudes post deadline papers》;20090529;全文 * |
| 异步通信光模块ODM-7在电力配网中的应用;无;《产品与方案》;20071029;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111049576A (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111049576B (en) | LOS (LOSs of line) alarm method for optical module | |
| CN113466900B (en) | Method and circuit for judging connection state of satellite navigation antenna | |
| CN103728429A (en) | Water quality online monitoring method and monitoring system | |
| CN109217922B (en) | Method and device for reporting loss alarm of received signal by optical module | |
| CN100507589C (en) | Electronic circuit, system with an electronic circuit and method for testing an electronic circuit | |
| CN210839573U (en) | Optical module LOS alarm system | |
| CN111697970B (en) | Low-computation-complexity periodic weak signal detection device | |
| CN101377449B (en) | Automatic test device of erbium-doped optical fiber amplifier | |
| CN103675653A (en) | Satellite mobile terminal CPLD test method | |
| CN115878417A (en) | Temperature monitoring device and method for security chip | |
| CN115416670A (en) | Hands-off detection method and device, electronic equipment, storage medium and vehicle | |
| US8390273B2 (en) | Slew rate compensated wheel speed sensor signal processing method and system | |
| JP2010091560A (en) | Device and method for detecting target using high-speed sampling device | |
| CN111351566B (en) | Vibration sensor with monitoring function and vibration signal monitoring method thereof | |
| CN111796208A (en) | Keyboard open-short circuit detection device and method | |
| CN113315587A (en) | Radio frequency link working state detection method, related detection device and system | |
| CN111044981A (en) | Fault detection method and system for multi-model radar communication extension set | |
| TWI598600B (en) | Method for performing cable diagnostics in a network system, and associated apparatus | |
| US6654220B2 (en) | Method for protection of an electrical power line | |
| CN115940952B (en) | ATE test method and device for digital-to-analog converter chip, electronic equipment and medium | |
| CN113433377B (en) | GE voltage detection device and method for IGBT | |
| CN203798513U (en) | Helium mass spectrometer data change detection additional apparatus | |
| WO2024066740A1 (en) | Detection circuit and control method therefor, and vehicle-mounted terminal device | |
| CN216697477U (en) | Smoke detection circuit and smoke alarm | |
| SU1285411A1 (en) | Device for checking generators |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |