CN110635341A - Optical fiber laser protection method and optical fiber laser - Google Patents
Optical fiber laser protection method and optical fiber laser Download PDFInfo
- Publication number
- CN110635341A CN110635341A CN201910887293.2A CN201910887293A CN110635341A CN 110635341 A CN110635341 A CN 110635341A CN 201910887293 A CN201910887293 A CN 201910887293A CN 110635341 A CN110635341 A CN 110635341A
- Authority
- CN
- China
- Prior art keywords
- laser
- information
- optical path
- preset
- pumping source
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the field of fiber lasers, and discloses a fiber laser protection method and a fiber laser, wherein the method comprises the following steps: determining the working state of a pumping source; when the working state of the pumping source is a laser output state, acquiring a detection signal, wherein the detection signal is used for indicating the transmission state of laser transmitted in the optical fiber; and when the detection signal meets the preset protection condition, generating protection information. The light-emitting condition of the pumping source is detected by detecting a current signal in the pumping source, a detection signal is obtained after the pumping source normally outputs laser, and when the detection signal meets a preset protection condition, protection information is rapidly generated, so that the damage degree of the optical fiber laser is reduced.
Description
Technical Field
The invention relates to the field of fiber lasers, in particular to a fiber laser protection method and a fiber laser.
Background
Fiber lasers can be divided into: low power fiber lasers, medium power fiber lasers, high power fiber lasers, and ultra high power fiber lasers.
When the optical fiber laser adopts a multi-stage optical path scheme, the pump switch time sequence between stages needs to be strictly controlled, otherwise, the optical fiber and even the pump source are easily burnt out. Experience shows that even though the timing control of each stage of pump source is good, the optical fiber is always burned due to various external factors.
In the process of implementing the invention, the inventor finds that the following problems exist in the related art: in the event of fiber burn, timely and reliable protection mechanisms become very important and critical.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a fiber laser protection method and a fiber laser, which can reliably protect the fiber laser.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for protecting a fiber laser, where the fiber laser includes at least one stage of optical path system, and each stage of optical path system includes at least one pump source and an optical fiber, where the method includes:
determining the working state of the pumping source;
when the working state of the pumping source is the laser output state, acquiring a detection signal, wherein the detection signal is used for indicating the transmission state of the laser transmitted in the optical fiber;
and generating protection information when the detection signal meets a preset protection condition.
Optionally, the operating state includes the laser output state or the laser non-output state:
when a current signal flowing through the pumping source is acquired, determining the working state of the pumping source as the laser output state;
and when a current signal flowing through the pumping source is not acquired, determining that the working state of the pumping source is the laser non-output state, wherein the current signal is used for driving the pumping source to output laser.
Optionally, the determining that the working state of the pump source is the laser output state includes:
judging whether the current signal is greater than or equal to a preset current threshold value;
if so, selecting the working state of the pumping source as the laser output state;
and if not, selecting the working state of the pumping source as the laser non-output state.
Optionally, the selecting the working state of the pump source as the laser output state includes:
presetting a current flag bit;
updating the current flag bit according to the current signal and a preset current threshold, wherein the current flag bit can be replaced by a first flag value or a second flag value, the first flag value is used for indicating that the current signal is greater than or equal to the preset current threshold, and the second flag value is used for indicating that the current signal is smaller than the preset current threshold;
when the flag value of the current flag bit is the first flag value, selecting the working state of the pumping source as the laser output state;
and when the flag value of the current flag bit is the second flag value, selecting the working state of the pumping source as the laser non-output state.
Optionally, the generating protection information when the detection signal meets a preset protection condition includes:
when the level type of the detection signal is a preset level type, generating protection information;
and entering a circulating detection state when the level type of the detection signal is a non-preset level type.
Optionally, when the level type of the detection signal is a preset level type, generating protection information includes:
judging whether the level type of the detection signal in the preset time length is a preset level type;
and if so, generating protection information.
Optionally, the protection information includes failure component information, and the generating protection information includes:
acquiring light emitting control information, wherein the light emitting control information is used for controlling the pumping source to generate laser;
and generating fault component information according to the light emitting control information, and packaging the fault component information in the protection information.
Optionally, the light-emitting control information includes light-emitting information or non-light-emitting information, the failure component information includes hardware failure information or optical path failure information, and generating failure component information according to the light-emitting control information includes:
when the light-emitting control information belongs to the light-emitting information, determining that the fault component information is light path fault information;
and when the light-emitting control information belongs to the non-light-emitting information, determining that the fault component information is hardware fault information.
Optionally, when the light-exiting control information is the light-exiting information, the method further includes:
acquiring detection signals of all levels of optical path systems;
and generating fault positioning information according to the detection signals of the optical path systems at all levels.
Optionally, the fiber laser is composed of two stages of optical path systems, and the generating of the fault location information according to the detection signal of each stage of optical path system includes:
when the detection signal of the first-stage optical path system meets a preset protection condition and the detection signal of the second-stage optical path system does not meet the preset protection condition, generating first fault information;
when the detection signal of the first-stage optical path system does not meet a preset protection condition and the detection signal of the second-stage optical path system meets the preset protection condition, generating second fault information;
and when the detection signals of the first-stage optical path system and the second-stage optical path system meet preset protection conditions, generating third fault information.
In a second aspect, embodiments of the present invention provide a fiber laser, including:
at least one stage of optical path system, including one or more pumping sources and optical fiber, where the pumping source is used to output laser, and the laser can be transmitted in the optical fiber;
the driving circuit is used for driving the optical path system to work; and the number of the first and second groups,
a control circuit connected to the optical path system and the driving circuit, respectively, wherein the control circuit includes:
at least one processor respectively connected with the optical path system and the driving circuit; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the memory stores a program of instructions executable by the at least one processor, the program of instructions being executable by the at least one processor to cause the at least one processor to perform the method of fiber laser protection.
In each embodiment of the invention, the light-emitting condition of the pumping source is detected by detecting a current signal in the pumping source, a detection signal of the PD detector is obtained after the pumping source normally outputs laser, and protection information is generated if the detection signal meets a preset protection condition. Under the condition that the pumping source works normally, the transmission condition of laser in the optical fiber is judged by detecting the detection signal of the PD detector within a certain time, and protection information is generated rapidly for abnormal conditions, so that the damage degree of the optical fiber laser is reduced and the optical fiber laser is protected reliably.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a block diagram of a fiber laser according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for protecting a fiber laser according to an embodiment of the present invention;
fig. 2a is a flowchart of a method for protecting a fiber laser according to another embodiment of the present invention;
fig. 2b is a flowchart of a method for protecting a fiber laser according to another embodiment of the present invention;
fig. 3 is a flowchart of a method for protecting a fiber laser according to another embodiment of the present invention;
fig. 3a is a flowchart of a method for protecting a fiber laser according to another embodiment of the present invention;
fig. 4 is a flowchart of a method for protecting a fiber laser according to another embodiment of the present invention;
fig. 5 is a flowchart of a method for fiber laser protection according to another embodiment of the present invention;
fig. 6 is a schematic diagram of a secondary optical path of a fiber laser according to yet another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a structural block diagram of a fiber laser according to an embodiment of the present invention, where the fiber laser 10 shown in the drawing may be used to implement a fiber laser protection method according to an embodiment of the present invention, please refer to fig. 1, where the fiber laser 10 is composed of a control circuit 11, a driving circuit 12 and at least one stage of optical system 13, where the driving circuit 12 is connected to the optical system 13 and is used to drive the optical system 13 to operate, the control circuit 11 is connected to the driving circuit 12 and the optical system 13 respectively, the control circuit 11 sends a driving signal to the driving circuit 12 to enable the driving circuit 12 to drive the optical system 13 to operate, and when a protection signal occurs in the optical system 13, the optical system 13 feeds back the protection signal to the control circuit 11 to enable the control circuit 11 to start a related protection program according to the protection signal.
In practical applications, the occurrence of the protection signal includes, but is not limited to, the following cases: fiber burning, fiber damage, failure of components or error protection and the like. The related protection program may be started by stopping sending the driving signal to the driving circuit 12 after the control circuit 11 receives the protection signal, so as to stop the operation of the optical path system 13.
The optical path system 13 mainly includes a pump source 131, a photodiode detector 132, and several other components, where the pump source 131 receives the driving signal from the driving circuit 12 and outputs pump laser, and the output laser is transmitted in the optical path system. The photodiode detector 132 is used for detecting the transmitted laser light, when laser light with a certain intensity passes through the photodiode detector 132, an output signal in the photodiode detector 132 is converted, and the transmission condition of the laser light in the optical fiber is judged according to the output signal of the photodiode detector 132.
The control circuit 11 is connected to the optical path system 13 and the driving circuit 12, respectively, wherein the control circuit includes:
at least one processor respectively connected with the optical path system and the driving circuit; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the memory stores a program of instructions executable by the at least one processor, the program of instructions being executable by the at least one processor to cause the at least one processor to perform the method of fiber laser protection.
It will be appreciated that the memory, as a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The processor executes various functional applications and data processing of the server by running the nonvolatile software program, instructions and modules stored in the memory, that is, implements the method for protecting the fiber laser in the following embodiments.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the coupon message push apparatus, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
In particular, reference may be made to the following description of embodiments regarding the specific method of fiber laser protection.
Referring to fig. 2, fig. 2 is a flowchart of a method for protecting a fiber laser according to an embodiment of the present invention, where the method includes the following steps:
the pumping source is a current source for enabling the laser working medium to achieve population inversion, common pumping modes mainly include electric pumping, chemical pumping, optical pumping and pneumatic pumping, and in the application, the pumping source adopts electric pumping. The pump source is used as a source of laser output, and laser can be generated only when working current is normally supplied. Therefore, under the condition that the pump is not damaged, as long as the current meeting the light-emitting condition passes through the pumping source, the pumping source can correspondingly generate laser output. Therefore, when detecting the laser function, the operating state of the pump source should be determined first.
The laser output state refers to that the current in the pumping source meets the light-emitting condition of the pumping source, so that laser is output, and the laser non-output state refers to that the current of the pumping source is smaller than the working current or no current is input, so that the pumping source cannot output the laser.
the laser output state is that the pump source works in working current to output laser, the output laser is transmitted in the optical fiber, and the intensity of the light is detected by a Photodiode (PD) detector, so that the transmission condition of the laser in the optical fiber is known. In this embodiment, the detection signal is a detection signal of the PD, when light with a certain intensity emitted by the pump source passes through the PD detector, an output signal in the PD changes, and the transmission condition of the laser light is determined by the change of the output signal.
And step 23, generating protection information when the detection signal meets a preset protection condition.
The preset protection condition means that the PD detector does not detect the light intensity signal within a certain time after the pumping source emits laser with certain intensity. When the preset protection condition is met, the abnormal conditions such as fiber burning, fiber breaking and the like occur in the transmission of the laser in the optical fiber, the PD detector feeds back the abnormal detection signal to the control circuit, and the control circuit generates corresponding protection information according to the detection signal.
The protection information may have various forms, and may include alarm information, and specifically, the protection information may include stopping outputting a driving signal to the driving circuit in time after receiving the abnormal detection signal, and turning off the power supply to make the pumping source work in a state where the laser is not output; or, the relevant staff is informed to process through a protection signal such as a signal indicator lamp, a buzzer, a vibration signal and the like.
In this embodiment, the light-emitting condition of the pump source is detected by detecting a current signal in the pump source, after the pump source normally outputs laser, a detection signal of the PD detector is obtained, and if the detection signal meets a preset protection condition, protection information is generated. Under the condition that the pumping source works normally, the transmission condition of laser in the optical fiber is judged by detecting a detection signal of the PD detector within a certain time, and protection information is sent out in time to the abnormal condition, so that the damage degree of the optical fiber laser is reduced.
In order to accurately obtain the working state of the pump source, where the working state of the pump source includes a laser output state or a laser non-output state, in some embodiments, please refer to fig. 2a, and fig. 2a is a flowchart of a method for protecting a fiber laser provided in an embodiment of the present invention, and determining the working state of the pump source includes the following steps:
and 212, when a current signal flowing through the pumping source is not acquired, determining that the working state of the pumping source is the laser non-output state, wherein the current signal is used for driving the pumping source to output laser.
The working state of the pumping source is determined by the current signal, and if the current signal is detected in the pumping source and the working state of the pumping source is the laser output state, the laser starts the protection method; if the current signal in the pumping source is not detected, and the working state of the pumping source is the laser non-output state, the laser does not enter the flow of the protection method. The pumping source is the source of laser output, and plays an important role in the detection of the laser.
In this embodiment, the current signal of the present application can be obtained by setting a sampling resistor in series with the pump source, and specifically, the current signal of the pump source is calculated according to the voltage value supplied to the pump source and the resistance value obtained by the sampling resistor.
In this embodiment, since the pump source is a source of laser output, in a detection process of the laser, a light emitting state of the laser is determined by detecting a current signal in the pump source, which provides a basis for laser transmission detection of the laser.
In some embodiments, the protection information is generated when an abnormal condition occurs during the transmission of the laser light in the optical fiber, that is, when the level type of the detection signal is a preset level type. The detection signal is a detection signal of the PD detector, and the PD detector converts the detection signal of the light into a level signal and feeds the level signal back to the controller. The preset level type is used for indicating that the PD detector does not detect the laser signal in the optical fiber, the controller compares the acquired detection signal with the preset level type, if the detection signal is equal to the preset level type, the abnormal condition occurs in the transmission of the laser in the optical fiber, and at the moment, the controller generates corresponding protection information so as to be capable of timely processing the abnormal condition.
In order to find out an abnormal condition in time for fast processing, in another embodiment, please refer to fig. 2b, where fig. 2b is a flowchart of a fiber laser protection method according to an embodiment of the present invention, where when the level type of the detection signal is a preset level type, the generating of the protection information includes the following steps:
231, judging whether the level type of the detection signal in the preset time length is a preset level type;
the preset time duration is a time duration for setting a laser transmission time duration within which the laser signal in the optical fiber can be normally transmitted from the pumping source to the PD detector, and therefore, the preset time duration is used to indicate the normal transmission time data of the laser signal.
And step 232, if so, generating protection information.
Within the preset duration, if the level type of the detection signal corresponding to the PD detector is the preset level type, the preset level type is used to indicate that the PD detector does not detect the laser signal, and it can be known that an abnormal condition occurs in the transmission of the laser signal in the optical fiber. At this point, the controller will generate protection information.
In this embodiment, a preset duration is set, and whether an abnormal condition occurs when the laser is transmitted in the optical fiber is determined by sequentially acquiring a current flag signal of the pumping source and a level type of the PD detector within the preset duration.
In other embodiments, the generating the protection information when the level type of the detection signal is a preset level type further includes:
and 233, entering a cycle detection state when the level type of the detection signal is a non-preset level type.
The non-preset level type is used for indicating that the PD detector detects the laser signal, i.e. the laser signal output from the pump source is transmitted to the PD detector position in the optical fiber as expected. At the moment, the system enters the next laser transmission detection, firstly obtains a current marking signal in the pumping source, sets a preset time length if the current marking signal is a first marking value, obtains the level type of the PD detector again within the preset time length, and finishes the process of cyclic detection by judging the current marking signal and the PD detection signal which are obtained cyclically.
In this embodiment, if the level type of the acquired detection signal is a non-preset level type, that is, when no abnormal condition occurs in the transmission of the laser in the optical fiber, the system enters a circular detection state, thereby ensuring the stability of the laser operation.
It will be appreciated that the pump source can only output laser light when the current signal in the pump source reaches a certain threshold.
In some embodiments, please refer to fig. 3, fig. 3 is a flowchart of a method for protecting a fiber laser according to an embodiment of the present invention, where the determining the working state of the pump source as the laser output state includes the following steps:
the preset current threshold refers to the working current level of the pumping source, and the pumping source works in a laser output or non-output state according to the working current level. The current signal is output to the pumping source by the driving circuit, namely the current signal is a real-time signal of the pumping source, and the output condition of the laser is determined by comparing the real-time signal in the pumping source with a preset current threshold.
and step 33, if not, selecting the working state of the pumping source as the laser non-output state.
If the current signal is greater than or equal to the preset current threshold, the pumping source is in a normal working state, and at the moment, the pumping source outputs stable laser; on the contrary, the current signal in the pumping source does not reach the working signal, and the pumping source cannot output laser. Therefore, the light emitting condition of the pumping source is determined by comparing the current signal with the preset current threshold value.
In the embodiment, the preset current threshold is set according to the pumping source, and the laser output condition of the pumping source is determined by comparing the preset current threshold with the current signal, so that the accuracy of judging the working state of the pumping source is improved.
If it is determined that the current signal is greater than or equal to the preset current threshold, and the pump source outputs stable laser, in some embodiments, please refer to fig. 3a, where fig. 3a is a flowchart of a method for protecting a fiber laser according to an embodiment of the present invention, where the selecting the working state of the pump source as the laser output state includes the following steps:
step 321, presetting a current flag bit;
the current flag bit is used for indicating the magnitude relation between a current signal in the pumping source and a preset current threshold, and the control circuit determines the current working condition of the pumping source by acquiring the data of the current flag bit.
Step 322, updating the current flag according to the current signal and a preset current threshold, wherein the current flag may be replaced with a first flag value or a second flag value, the first flag value is used to indicate that the current signal is greater than or equal to the preset current threshold, and the second flag value is used to indicate that the current signal is smaller than the preset current threshold;
the switching between the first flag value and the second flag value is used to indicate the switching of the working state of the pump source, and it can be understood that the first flag value and the second flag value are both values that can be recognized by the control circuit. When the obtained current flag bit is a high-level signal, the current signal in the pumping source is greater than or equal to the preset current threshold; and when the acquired current flag bit is a low-level signal, the current signal in the pumping source is smaller than the preset current threshold.
Step 323, when the flag value of the current flag bit is the first flag value, selecting the working state of the pumping source as the laser output state; and when the flag value of the current flag bit is the second flag value, selecting the working state of the pumping source as the laser non-output state.
In this embodiment, the change condition of the current in the pumping source is indicated by replacing the current flag with the first flag value or the second flag value, and when the current signal is greater than or equal to the preset current threshold, the current flag is the first flag value; and when the current signal is smaller than the preset current threshold, the current flag bit is a second flag value. The control circuit determines the working condition of the current pumping source by acquiring the data of the current flag bit.
In some embodiments, the detection signal comprises an electrical signal.
The detection signal is converted and output by a PD detector, the PD detector generates a weak current signal proportional to the light brightness, and a preamplifier converts the current signal into a usable voltage signal, so that the conversion process from the optical signal to the electric signal is completed.
In other embodiments, the protection information further includes fault component information, please refer to fig. 4, where fig. 4 is a flowchart of a method for protecting a fiber laser according to an embodiment of the present invention, and as shown in fig. 4, generating the protection information includes the following steps:
and 42, generating fault component information according to the light emitting control information.
In this embodiment, the light-emitting control information is used to control the pump source to generate laser, where when the light-emitting control information is driving information for driving the pump source to operate, the pump source generates laser according to the light-emitting control information, however, when the optical path fails, even if the pump source receives the light-emitting control information, protection information is generated.
When the light-emitting control information is the working information for stopping the work of the pump source, the pump source stops generating laser according to the light-emitting control information, however, when a hardware fault occurs, even if the pump source does not receive the light-emitting control information, the pump source still generates laser, for example, an MOS (metal oxide semiconductor) tube in a pump source driving board fails, so that the pump source generates leakage current, and the leakage current can prompt the pump source to generate laser.
In other embodiments, the light-emitting Control information may include various Control signals for controlling the operating state of the pump source, where the Control signals include a Control signal, an EN enable signal, a 0-10V power setting signal, a PWM modulation signal, and the like. When the Control signal, the EN enable signal, the 0-10V power setting signal and the PWM modulation signal all meet the light emitting condition, that is, the light emitting Control information is the driving information for driving the pump source to work, then the pump source can generate laser according to the light emitting Control information.
Similarly, when any one or more of the Control signal, the EN enable signal, the 0-10V power setting signal, and the PWM modulation signal do not satisfy the light emitting condition, that is, the light emitting Control information is the working information for stopping the operation of the pump source, then the pump source can stop generating the laser or stop working according to the light emitting Control information.
Therefore, on the premise that the working state of the pump source is known to be a laser output state, and the detection signal meets the preset protection condition (for example, the detection signal is at a low level), when the light extraction control information is enough to indicate that the pump source works in a corresponding state, the hardware or the optical path fails but is separated from the control of the light extraction control information, and as the light extraction control information is associated with the fault component, the light extraction control information is acquired, and the fault component can be deduced according to the light extraction control information.
For example, the light-emitting control information includes light-emitting information or non-light-emitting information, the failure component information includes hardware failure information or optical path failure information, and when the light-emitting control information belongs to the light-emitting information, it is determined that the failure component information is optical path failure information. That is, when the light-emitting control information is driving information for driving the pump source to operate, the pump source generates laser according to the light-emitting control information, however, the laser generates protection information, it can be inferred that an abnormal condition, such as fiber burning, fiber breakage, etc., occurs in the transmission of the laser generated by the pump source in the optical fiber, and at this time, the laser cannot be normally transmitted to the PD detector position in the optical fiber, so that the PD detector cannot detect the optical signal and output a low-level detection signal, thereby determining that the faulty component information is optical path fault information, and generating faulty component information.
And when the light-emitting control information belongs to the non-light-emitting information, determining that the fault component information is hardware fault information. That is, when the light-emitting control information is the working information for stopping the pump source from working, the pump source stops generating laser according to the light-emitting control information, however, the laser generates the protection information. That is, the pump source still operates in the laser output state without receiving the driving information, so that the protection program of the laser is triggered to generate the protection information, and therefore, the hardware fault can be inferred. The hardware fault information is fault information of the pump source driving circuit and related electronic components thereof, for example, a leakage current exists in the pump source due to a fault of a Metal Oxide Semiconductor (MOS) transistor (field effect transistor) in the pump source driving board, so that the pump source is prompted to generate laser, and therefore the fault component information can be determined to be hardware fault information, and fault component information is generated according to the hardware fault information.
In the embodiment, the judgment of the fault component is performed by combining the light emitting control information for controlling the pump source to generate the laser so as to generate the fault component information, so that the intelligent positioning of the fault component is realized, and the accuracy of the positioning of the fault component is improved.
In other embodiments, when the light-emitting control information is the light-emitting information, please refer to fig. 5, and fig. 5 is a flowchart of an optical fiber laser according to an embodiment of the present invention, as shown in fig. 5, the method further includes the following steps:
and step 52, generating fault positioning information according to the detection signals of the optical path systems of all the stages.
In this embodiment, the optical fiber laser includes at least one stage of optical path system, each stage of optical path system includes a pump source and an optical fiber, and a PD detector is disposed in each stage of optical fiber to accurately reflect a fault condition of each stage of optical path system. When the light emitting control information is the light emitting information, the pumping source generates laser according to the light emitting control information, the laser may trigger a plurality of series PD detectors to generate protection information in the process of transmitting in the optical path system, and fault positioning information is generated according to the series information of the PD detectors generating the protection information.
Specifically, when the light emitting control information of the pump sources of each stage of optical path system is driving information, that is, the pump sources of each stage of optical path system are in a working laser output state, the detection signals of each stage of optical path system are obtained. If the detection signal of any one or more than one stage meets the preset protection condition (the detection signal is a low-level signal), the abnormal condition of the transmission of the laser in the stage of optical fiber can be inferred. And generating fault positioning information according to the detection signals of all levels of optical path systems, so that an operator can quickly position a fault position according to the fault positioning information.
For further explanation of a specific method for locating a fault position, a fiber laser with two stages of optical path systems is taken as an example, and it is understood that this example is only a preferred embodiment provided by the present invention, and the present invention may also be composed of optical path systems with other stages, and is not limited to the optical path systems described in the following embodiments.
Referring to fig. 6, fig. 6 is a schematic diagram of a two-stage optical path of a fiber laser according to an embodiment of the present invention, and as shown in fig. 6, the fiber laser 60 is composed of two-stage optical path systems, and generates fault location information of the fiber laser according to detection signals of the two-stage optical path systems. The two-stage optical path system comprises a first-stage optical path system and a second-stage optical path system, the first-stage optical path system and the second-stage optical path system respectively comprise a pumping source and an optical fiber, and each stage of optical fiber is provided with a PD detector. The first stage optical path system includes, but is not limited to, a first stage pump source 601 and a first stage PD detector 602, and the second stage optical path system includes, but is not limited to, a second stage pump source 603 and a second stage PD detector 604.
Specifically, when the primary pump source 601 and the secondary pump source 603 both work in a laser output state and no abnormal condition occurs in the optical fibers of the two-stage optical path system, the laser output by the primary pump source 601 is transmitted to the second-stage optical path system along the primary optical fiber and is output by the laser head; the laser output by the secondary pump source 603 and the laser output by the primary pump source 601 are combined into one beam and output by the laser head, and at this time, both the primary PD detector 602 and the secondary PD detector 604 can detect optical signals and output high-level signals.
If the optical fiber of any one or two stages of optical path systems is abnormal, the fault positioning information generated when the pumping sources of the two stages of optical path systems work in a laser output state comprises the following conditions:
and when the detection signal of the first-stage optical path system meets a preset protection condition and the detection signal of the second-stage optical path system does not meet the preset protection condition, generating first fault information. Specifically, the primary pump source 601 and the secondary pump source 603 both operate in a laser output state, and if the detection signal of the primary PD detector 602 is a low-level signal and the detection signal of the secondary PD detector 604 is a high-level signal, it is known that the transmission of the laser signal is not detected in the first-stage optical fiber, and the transmission of the laser signal is detected in the second-stage optical fiber, because the transmission of the laser signal is interrupted by the first-stage optical fiber, the laser signal detected in the second-stage optical fiber is output by the secondary pump source 603, and therefore it can be inferred that the first-stage optical fiber is abnormal, and first fault information is generated according to the abnormality of the first-stage optical fiber, so as to inform an operator that the position information of the optical fiber with the fault is the first-stage optical fiber.
And when the detection signal of the first-stage optical path system does not meet the preset protection condition and the detection signal of the second-stage optical path system meets the preset protection condition, generating second fault information. Specifically, the primary pump source 601 and the secondary pump source 603 both operate in a laser output state, and if the detection signal of the primary PD detector 602 is a high level signal and the detection signal of the secondary PD detector 604 is a low level signal, it can be known that the laser signal output by the primary pump source 601 is detected in the first-stage optical fiber, and the laser signal output by the primary pump source 601 or/and the secondary pump source 603 is not detected in the second-stage optical fiber, so that it can be inferred that the second-stage optical fiber is in an abnormal state, and second fault information is generated according to the abnormality of the second-stage optical fiber to inform an operator that the position information of the optical fiber in which the fault occurs is the second-stage optical fiber.
And when the detection signals of the first-stage optical path system and the second-stage optical path system meet preset protection conditions, generating third fault information. Specifically, the primary pump source 601 and the secondary pump source 603 both operate in a laser output state, and if the detection signals of the primary PD detector 602 and the secondary PD detector 604 are low-level signals, it can be known that the laser signal output by the primary pump source 601 is not detected in the first-stage optical fiber, and the laser signal output by the primary pump source 601 or/and the secondary pump source 603 is not detected in the second-stage optical fiber, so that it can be inferred that the first-stage optical fiber is in an abnormal state, and third fault information is generated according to the abnormality of the first-stage optical fiber, so as to inform an operator that the position information of the optical fiber in which the fault occurs is the first-stage optical fiber.
In other embodiments, the fiber laser protection method is adopted, and only when the current of the pumping source passes through and reaches a certain value, the PD feedback signal is detected to judge whether fiber is burned or not, and the false alarm is avoided.
In other embodiments, by adopting the fiber laser protection method, the protection method can also effectively detect and execute alarm protection actions aiming at accidental light emission caused by factors such as external interference or device faults.
In other embodiments, the fiber laser protection method can generate protection information within a time less than 50 μ s, and position a faulty component according to the protection information and perform corresponding protection processing, for example, turning off a power supply, so that the pumping source operates in a laser non-output state; or, the relevant staff is informed to process through a protection signal such as a signal indicator lamp, a buzzer, a vibration signal and the like. Thereby reducing the damage and avoiding greater potential safety hazard.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be Flash, EEPROM, magnetic disk, optical disk, Read-Only Memory (ROM), Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. A method for protecting a fiber laser, wherein the fiber laser comprises at least one stage of optical path system, and each stage of optical path system comprises at least one pump source and an optical fiber, the method comprising:
determining the working state of the pumping source;
when the working state of the pumping source is a laser output state, acquiring a detection signal, wherein the detection signal is used for indicating the transmission state of the laser transmitted in the optical fiber;
and generating protection information when the detection signal meets a preset protection condition.
2. The method of claim 1, wherein the operating state comprises the laser-output state or a laser-non-output state;
when a current signal flowing through the pumping source is acquired, determining the working state of the pumping source as the laser output state;
and when a current signal flowing through the pumping source is not acquired, determining that the working state of the pumping source is the laser non-output state, wherein the current signal is used for driving the pumping source to output laser.
3. The method of claim 2, wherein determining the operating state of the pump source as the laser output state comprises:
judging whether the current signal is greater than or equal to a preset current threshold value;
if so, selecting the working state of the pumping source as the laser output state;
and if not, selecting the working state of the pumping source as the laser non-output state.
4. The method of claim 3, wherein selecting the operating state of the pump source to be the laser output state comprises:
presetting a current flag bit;
updating the current flag bit according to the current signal and a preset current threshold, wherein the current flag bit can be replaced by a first flag value or a second flag value, the first flag value is used for indicating that the current signal is greater than or equal to the preset current threshold, and the second flag value is used for indicating that the current signal is smaller than the preset current threshold;
when the flag value of the current flag bit is the first flag value, selecting the working state of the pumping source as the laser output state;
and when the flag value of the current flag bit is the second flag value, selecting the working state of the pumping source as the laser non-output state.
5. The method according to any one of claims 1 to 4, wherein the generating protection information when the detection signal satisfies a preset protection condition comprises:
when the level type of the detection signal is a preset level type, generating protection information;
and entering a circulating detection state when the level type of the detection signal is a non-preset level type.
6. The method according to claim 5, wherein the generating protection information when the level type of the detection signal is a preset level type comprises:
judging whether the level type of the detection signal in the preset time length is a preset level type;
and if so, generating protection information.
7. The method of any of claims 1 to 4, wherein the protection information comprises faulty component information, and wherein generating protection information comprises:
acquiring light emitting control information, wherein the light emitting control information is used for controlling the pumping source to generate laser;
and generating the fault component information according to the light emitting control information.
8. The method of claim 7, wherein the light-exiting control information includes light-exiting information or non-light-exiting information, the failure component information includes hardware failure information or optical path failure information, and the generating the failure component information according to the light-exiting control information includes:
when the light-emitting control information belongs to the light-emitting information, determining that the fault component information is light path fault information;
and when the light-emitting control information belongs to the non-light-emitting information, determining that the fault component information is hardware fault information.
9. The method according to claim 8, wherein when the light-exiting control information is the light-exiting information, the method further comprises:
acquiring detection signals of all levels of optical path systems;
and generating fault positioning information according to the detection signals of the optical path systems at all levels.
10. The method according to claim 9, wherein the fiber laser is composed of two stages of optical path systems, and the generating of the fault location information according to the detection signals of the optical path systems at each stage comprises:
when the detection signal of the first-stage optical path system meets a preset protection condition and the detection signal of the second-stage optical path system does not meet the preset protection condition, generating first fault information;
when the detection signal of the first-stage optical path system does not meet a preset protection condition and the detection signal of the second-stage optical path system meets the preset protection condition, generating second fault information;
and when the detection signals of the first-stage optical path system and the second-stage optical path system meet preset protection conditions, generating third fault information.
11. A fiber laser, comprising:
at least one stage of optical path system, including one or more pumping sources and optical fiber, where the pumping source is used to output laser, and the laser can be transmitted in the optical fiber;
the driving circuit is used for driving the optical path system to work; and the number of the first and second groups,
a control circuit connected to the optical path system and the driving circuit, respectively, wherein the control circuit includes:
at least one processor respectively connected with the optical path system and the driving circuit; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the memory stores a program of instructions executable by the at least one processor to cause the at least one processor to perform the method of fibre laser protection of any of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910887293.2A CN110635341A (en) | 2019-09-19 | 2019-09-19 | Optical fiber laser protection method and optical fiber laser |
| PCT/CN2020/113039 WO2021052176A1 (en) | 2019-09-19 | 2020-09-02 | Optical fiber laser device protection method and optical fiber laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910887293.2A CN110635341A (en) | 2019-09-19 | 2019-09-19 | Optical fiber laser protection method and optical fiber laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110635341A true CN110635341A (en) | 2019-12-31 |
Family
ID=68971733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910887293.2A Pending CN110635341A (en) | 2019-09-19 | 2019-09-19 | Optical fiber laser protection method and optical fiber laser |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110635341A (en) |
| WO (1) | WO2021052176A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504605A (en) * | 2020-04-22 | 2020-08-07 | 四川思创优光科技有限公司 | Forward light detection method of continuous fiber laser |
| WO2021052176A1 (en) * | 2019-09-19 | 2021-03-25 | 苏州创鑫激光科技有限公司 | Optical fiber laser device protection method and optical fiber laser device |
| CN113687333A (en) * | 2020-05-16 | 2021-11-23 | 北醒（北京）光子科技有限公司 | Transmitting signal state monitoring circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852052A (en) * | 2005-12-09 | 2006-10-25 | 华为技术有限公司 | Optical-fiber line fault down stream alarm inhibiting method, apparatus and system |
| CN105721048A (en) * | 2016-02-19 | 2016-06-29 | 南京晓庄学院 | Compound optical fiber communication line fault monitoring method and system |
| CN107123923A (en) * | 2017-05-26 | 2017-09-01 | 深圳市创鑫激光股份有限公司 | Optical fiber laser, the guard method of optical fiber laser and storage medium |
| CN110057548A (en) * | 2019-03-28 | 2019-07-26 | 苏州创鑫激光科技有限公司 | A kind of measuring system and method |
| CN110148544A (en) * | 2019-05-05 | 2019-08-20 | 北京新能源汽车股份有限公司 | method and system for preventing relay adhesion |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7742513B2 (en) * | 2005-10-18 | 2010-06-22 | The Furukawa Electric Co., Ltd. | Fiber laser modulation method and modulator |
| WO2012073952A1 (en) * | 2010-11-29 | 2012-06-07 | 古河電気工業株式会社 | Fiber laser apparatus, and method of detecting abnormality of fiber laser apparatus |
| CN106533547B (en) * | 2016-10-19 | 2018-12-18 | 全球能源互联网研究院有限公司 | Power optical fiber communication line fault monitoring device |
| CN110635341A (en) * | 2019-09-19 | 2019-12-31 | 苏州创鑫激光科技有限公司 | Optical fiber laser protection method and optical fiber laser |
-
2019
- 2019-09-19 CN CN201910887293.2A patent/CN110635341A/en active Pending
-
2020
- 2020-09-02 WO PCT/CN2020/113039 patent/WO2021052176A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852052A (en) * | 2005-12-09 | 2006-10-25 | 华为技术有限公司 | Optical-fiber line fault down stream alarm inhibiting method, apparatus and system |
| CN105721048A (en) * | 2016-02-19 | 2016-06-29 | 南京晓庄学院 | Compound optical fiber communication line fault monitoring method and system |
| CN107123923A (en) * | 2017-05-26 | 2017-09-01 | 深圳市创鑫激光股份有限公司 | Optical fiber laser, the guard method of optical fiber laser and storage medium |
| CN110057548A (en) * | 2019-03-28 | 2019-07-26 | 苏州创鑫激光科技有限公司 | A kind of measuring system and method |
| CN110148544A (en) * | 2019-05-05 | 2019-08-20 | 北京新能源汽车股份有限公司 | method and system for preventing relay adhesion |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021052176A1 (en) * | 2019-09-19 | 2021-03-25 | 苏州创鑫激光科技有限公司 | Optical fiber laser device protection method and optical fiber laser device |
| CN111504605A (en) * | 2020-04-22 | 2020-08-07 | 四川思创优光科技有限公司 | Forward light detection method of continuous fiber laser |
| CN111504605B (en) * | 2020-04-22 | 2022-07-12 | 四川思创激光科技有限公司 | Forward light detection method of continuous fiber laser |
| CN113687333A (en) * | 2020-05-16 | 2021-11-23 | 北醒（北京）光子科技有限公司 | Transmitting signal state monitoring circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021052176A1 (en) | 2021-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110635341A (en) | Optical fiber laser protection method and optical fiber laser | |
| US9088010B2 (en) | Organic EL illuminating apparatus | |
| JP5117524B2 (en) | Laser diode control apparatus and laser diode control method | |
| US7020171B2 (en) | Laser oscillator | |
| EP2056081B1 (en) | Improvements in and relating to UV gas discharge tubes | |
| CN106888518B (en) | Self-excitation judging method, self-excitation judging device and semiconductor microwave equipment | |
| CN112098046A (en) | Detection system and detection method of semiconductor laser | |
| KR20130056085A (en) | Short protection circuit of led lighting part | |
| JP6351696B2 (en) | Light emitting device, fiber laser, and ground fault determination method | |
| CN111141504B (en) | Fire-break detection method and device and computer readable storage medium | |
| CN113704066A (en) | Machine room equipment monitoring and management method, storage medium and system | |
| JP2015049166A (en) | Lubricant deterioration determination apparatus, lubricant deterioration determination method, and program | |
| US20190356111A1 (en) | Light emission driving device and driving method thereof | |
| JP2011222341A (en) | Lighting control device for organic electroluminescent panel | |
| CN107438302B (en) | LED short-circuit protection system | |
| EP2955801B1 (en) | Assessment method for output optical power decrease in optical amplification device, and optical amplification system | |
| CN106842786B (en) | Laser projection equipment | |
| JP6472028B2 (en) | Evacuation guidance system | |
| EP4113136A1 (en) | Testing an arc detecting system | |
| CN220753999U (en) | Linkage control system of multistage pump source and fiber laser | |
| US20220128781A1 (en) | Laser device | |
| EP4346103A2 (en) | Photoelectric sensor and light projector | |
| KR101520340B1 (en) | Led lighting device having a self diagnosis function | |
| CN118040462A (en) | Laser and pumping source driving control system thereof | |
| CN118416434A (en) | Fire control system, control method, electronic device and storage medium |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |
|
| RJ01 | Rejection of invention patent application after publication |