CN108233159A - Pulse optical fiber based on relaxation effect - Google Patents
Pulse optical fiber based on relaxation effect Download PDFInfo
- Publication number
- CN108233159A CN108233159A CN201810135248.7A CN201810135248A CN108233159A CN 108233159 A CN108233159 A CN 108233159A CN 201810135248 A CN201810135248 A CN 201810135248A CN 108233159 A CN108233159 A CN 108233159A
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- Prior art keywords
- optical fiber
- laser
- module
- pulse
- control module
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- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06733—Fibre having more than one cladding
-
- 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
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0912—Electronics or drivers for the pump source, i.e. details of drivers or circuitry specific for laser pumping
Abstract
The invention discloses a kind of pulse optical fibers based on relaxation effect, including sensor assembly, control module, drive module and optical module, drive module is used to drive pump diode, sensor assembly includes peak detection block and photodetector, photodetector is used to detect laser pulse, and optical signal is converted to current signal, peak detection block is used for the peak value of sensed current signal, peak detection block link control module, in a laser pulse period, control module controls drive module that drive module is made to disconnect diode before peak-current signal is detected.Control module can be modulated by adjusting drive module and then to pump laser.By the modulation of control module, stop pumping before laser-formed first pulse spike terminates in optical fiber laser, the laser pulse that pulsewidth is less than the first spike can be obtained.By the modulation of control module, the optical fiber laser pulse of required pulsewidth can be obtained.
Description
Technical field
The present invention relates to pulse optical fiber fields, and in particular to the pulse optical fiber based on relaxation effect.
Background technology
Optical fiber laser refers to the laser by the use of rare earth doped element glass optical fiber as gain media, because it is with light beam
The advantages that quality is small, photoelectric conversion efficiency is high, at low cost, stability is good, small generates huge shadow to traditional laser industry
It rings, optical fiber laser has been widely used in the fields such as industrial processes, optic communication, medicine, military affairs.At present, optical fiber laser
Main function industrially is cutting, drilling, welding, mark.Wherein laser mark is to laser machine answering for industry maximum
With one of field, basic principle is：By the laser beam of laser generator generation high-energy, laser action after focusing is in holding
Material is printed, surfacing moment is made to melt or even gasification, by controlling laser in the path of material surface, so as to form needs
Graphic context label.
Mainly having Q-switched laser applied to the optical fiber laser type of industrial marking now, (main oscillations power is put with MOPA
Big device) laser.Wherein, Q-switched laser cost is higher, and mark base material is yielding, and shading is coarse, and impulse waveform is single not
It is modulated.In comparison, MOPA optical fiber lasers shading exquisiteness is indeformable, impulse waveform is modulated, and application range is wider.But
Be MOPA optical fiber lasers it is that laser pulse is adjusted by modulating seed source, under prior art conditions, pumping swashs
Light is not accomplished also consistent with seed source laser pulse, and such pumping laser must advance into doubly clad optical fiber in laser pulse, and
And pumping could be stopped after end-of-pulsing, therefore, the pump light in gain fibre is not fully absorbed, and leads to MOPA laser
Still there is laser output in the device inoperative period, is not achieved and completely closes.
Invention content
The technical problem to be solved by the present invention is to solve above-mentioned the deficiencies in the prior art, pumping can be fully absorbed by providing one kind
The pulse optical fiber of light.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of pulsed light based on relaxation effect
Fibre laser, including sensor assembly, control module, drive module and optical module, the optical module includes generating pump
The pump diode of Pu light is used to form the reflective grid of height of resonator and low reflective grid, the covering for removing remnant pump light
Photospallation device and the laser out splice going splice for laser output, setting is for pumping between high reflective grid and low reflective grid
The gain fibre of laser needed for light absorption generation, for driving pump diode, sensor assembly includes peak value and examines drive module
Module and photodetector are surveyed, photodetector is used to detect laser pulse, and optical signal is converted to current signal, peak value
Detection module be used for sensed current signal peak value, peak detection block link control module, in a laser pulse period,
Control module controls drive module that drive module is made to disconnect diode before peak-current signal is detected.
Further, drive module includes PWM PDM keyers, two metal-oxide-semiconductors and inductance and input and output electricity
Hold, the grid of metal-oxide-semiconductor is all connected with the break-make that PWM PDM keyers are controlled by it MOSFET, the source electrode of one of metal-oxide-semiconductor
It connects power supply and inductance respectively with error of omission and is used to form inductance and magnetize access, the source electrode and drain electrode of another metal-oxide-semiconductor then connects respectively
It connects inductance and pump diode is used to form inductance continuous current circuit.
Further, drive module further includes current sample feedback error amplifier, voltage sample feedback error amplifier,
The end of current sample feedback error amplifier connects inductance and PWM PDM keyers, voltage sample feedback error respectively
The end of amplifier connects inductance and PWM PDM keyers respectively.
Further, the peak detection block includes trsanscondutance amplifier and ADC sampling modules, trsanscondutance amplifier connection
Light sensation induced current is converted into voltage signal by photodetector and reference voltage, and ADC sampling modules adopt voltage signal
Sample, and send the voltage signal sampled to control module.
Further, single pulse Joule energy module is further included, is sampled including positive error integrating circuit and ADC
Module, positive error integrating circuit carry out the laser output of single pulse integration and are converted to a constant voltage, ADC sampling moulds
Block samples constant voltage, and sends sampled signal to control module.
Further, the optical module includes further including bundling device, and the quantity of pump diode is multiple, pump diode
High reflective grid are reconnected after bundling device closes beam.
Further, the optical fiber of the reflective grid of the height and low reflective grid is double-clad structure, and the two combines and forms resonance
Chamber, fibre core have laser reflex, high reflective grid reflectivity 95%-100%, low reflective grid reflectivity 10%-30%.
Further, the gain fibre is double-clad structure, and fibre core is doped with rare earth material.
From above-mentioned technical proposal it can be seen that the present invention has the following advantages：Control module can be by adjusting drive module
And then pump laser is modulated.By the modulation of control module, laser-formed first pulse in optical fiber laser
Spike stops pumping before terminating, and can obtain the laser pulse that pulsewidth is less than the first spike.It, can be with by the modulation of control module
The optical fiber laser pulse of pulsewidth needed for acquisition.
Description of the drawings
Fig. 1 is the functional block diagram of the present invention.
Fig. 2 is the structure diagram of optical module in the present invention；
Fig. 3 is the structure diagram of drive module in the present invention；
Fig. 4 is the structure diagram of peak detection block in the present invention；
Fig. 5 is single pulse Joule energy module in the present invention.
Specific embodiment
It elaborates below in conjunction with attached drawing to the specific embodiment of the present invention.
As shown in Figure 1, the pulse optical fiber based on relaxation effect of the present invention includes sensor assembly, control mould
Block, drive module and optical module.Control module can be modulated by adjusting drive module and then to pump laser.It is logical
The modulation of control module is crossed, stops pumping before laser-formed first pulse spike terminates in optical fiber laser, can obtain
Pulsewidth is less than the laser pulse of the first spike.By the modulation of control module, the optical fiber laser arteries and veins of required pulsewidth can be obtained
Punching.
Wherein optical module is as shown in Fig. 2, including generating the pump diode 11 of pump light, being used to form the height of resonator instead
Grating 13 and low reflective grid 15, the laser for removing the cladding light stripper 16 of remnant pump light and being exported for laser
Out splice going splice 17, between high reflective grid 13 and low reflective grid 15 setting for laser needed for being generated to Pumping light absorption gain
Optical fiber 14, diode is directly connect with high reflective grid when pump diode can be 1 or more, 1, and more whens can pass through
Bundling device 12 closes Shu Houzai and is connect with high reflective grid, and the launch wavelength of the pump diode corresponds to gain in gain fibre and is situated between
The absorption spectra of matter, pump mode can be divided into front end forward pumping, rear end backward pumping or both ends and pump simultaneously.It is described high anti-
The optical fiber of grating and low reflective grid is double-clad structure, and the two, which combines, forms resonator, and fibre core has reflex to laser,
High reflective grid reflectivity 95%-100%, low reflective grid reflectivity 10%-30%.The gain fibre is double-clad structure, fine
Core can absorb pump light generation wide spectrum optical, the resonator formed through excessively high reflective grid and low reflective grid doped with rare earth material
Frequency-selecting after to required laser amplifier.
As shown in figure 3, drive module, for driving pump diode, drive module includes PWM PDM keyers, two
A metal-oxide-semiconductor and inductance, the grid of metal-oxide-semiconductor are all connected with the break-make that PWM PDM keyers are controlled by it MOSFET, wherein
The source electrode of one metal-oxide-semiconductor and error of omission connect power supply respectively and inductance is used to form inductance and magnetizes access, the source electrode of another metal-oxide-semiconductor
Then inductance is connected with drain electrode respectively and pump diode is used to form inductive discharge circuit.It is anti-that drive module further includes current sample
Feedforward error amplifier, voltage sample feedback error amplifier, the end of current sample feedback error amplifier connect inductance respectively
With PWM PDM keyers, the end of voltage sample feedback error amplifier connects inductance and PWM pulsewidth modulation controls respectively
Device processed.The driving design in laser constant-current source is carried out by the way of switched current source, using the double sampled feedback of Current Voltage
Mode is operated in the mode of constant frequency feedback regulation duty ratio to export constant laser diode current.
Sensor assembly includes peak detection block, single pulse Joule energy module and photodetector, and photoelectricity is visited
It surveys device and photodiode may be used, optical signal is converted to electric current letter by wherein photodetector for detecting laser pulse
Number, peak detection block is cross over amplifier connection photodetection as shown in figure 4, including trsanscondutance amplifier and ADC sampling modules
Light sensation induced current is converted into voltage signal by device and reference voltage, and ADC sampling modules sample voltage signal, and will adopt
Sample to voltage signal send control module to.In a laser pulse period, control module is detecting peak point current letter
Control drive module makes drive module disconnect diode before number, and the chips such as DSP may be used in control module, in drive module
PWM PDM keyers controlled, and then to pumping diode carry out break-make control.
Single pulse Joule energy module as shown in figure 5, it includes positive error integrating circuit and ADC sampling modules,
Positive error integrating circuit carries out integration to the laser output of single pulse and is converted to a constant voltage, ADC sampling modules pair
Constant voltage is sampled, and sends sampled signal to control module.This circuit further comprise an integral reset signal and
Zero device is reflected to ensure the complete reset of integrating circuit, ensures the accuracy of sampling.
It can be popped one's head in set temperature, be placed in inside optical module and be also easy to produce at high temperature, such as optical fiber fusion welding point, bundling device, mould
Formula stripper etc..Luminous power probe is placed near optical fiber.Sensing module passes monitoring information back control module, and optical fiber can be swashed
Temperature and the power real time monitoring of light device, control module can close optical fiber laser immediately when occurring abnormal.
The pulse optical fiber of the present invention is high, compact-sized, non-maintaining with good beam quality, electricity conversion
The advantages that.For mark shading exquisiteness to be indeformable, impulse waveform is modulated, there is no impurity light between each pulse of laser, can be with
It completely closes.Optical fiber laser has real-time monitoring and control, prevents abnormal conditions from occurring, and improves safety in production.Also increase software
Control function, diversified Interface Controller realize the intelligent manipulation of optical fiber laser.
Claims (8)
1. a kind of pulse optical fiber based on relaxation effect, including sensor assembly, control module, drive module and light
Module, it is characterised in that：The optical module includes generating the pump diode of pump light, being used to form the height of resonator instead
Grating and low reflective grid connect for the cladding light stripper that removes remnant pump light and the laser output exported for laser
Head, between high reflective grid and low reflective grid setting drive mould for the gain fibre of laser needed for being generated to Pumping light absorption
Block is for driving pump diode, and sensor assembly includes peak detection block and photodetector, and photodetector is used for
Laser pulse is detected, and optical signal is converted to current signal, peak detection block is used for the peak value of sensed current signal, peak value
Detection module link control module, in a laser pulse period, control module is controlled before peak-current signal is detected
Drive module processed makes drive module disconnect diode.
2. the pulse optical fiber according to claim 1 based on relaxation effect, it is characterised in that：Drive module includes
PWM PDM keyers, two metal-oxide-semiconductors and inductance, the grid of metal-oxide-semiconductor are all connected with PWM PDM keyers by its control
The break-make of grid processed, the source electrode of one of metal-oxide-semiconductor and error of omission connect power supply respectively and inductance is used to form inductance and magnetizes access,
The source electrode and drain electrode of another metal-oxide-semiconductor then connects inductance respectively and pump diode is used to form inductive discharge circuit.
3. the pulse optical fiber according to claim 2 based on relaxation effect, it is characterised in that：Drive module is also wrapped
Include current sample feedback error amplifier, voltage sample feedback error amplifier, the end of current sample feedback error amplifier
It connects inductance respectively and PWM PDM keyers, the end of voltage sample feedback error amplifier connects inductance and PWM respectively
PDM keyer.
4. the pulse optical fiber according to claim 1 based on relaxation effect, it is characterised in that：The peak detection
Module includes trsanscondutance amplifier and ADC sampling modules, trsanscondutance amplifier connection photodetector and reference voltage, by photoinduction
Electric current is converted into voltage signal, and ADC sampling modules sample voltage signal, and send the voltage signal sampled to control
Molding block.
5. the pulse optical fiber according to claim 1 based on relaxation effect, it is characterised in that：Further include single arteries and veins
Joule energy module is rushed, including positive error integrating circuit and ADC sampling modules, positive error integrating circuit is to single arteries and veins
The laser output of punching carries out integration and is converted to a constant voltage, and ADC sampling modules sample constant voltage, and will sampling
Signal sends control module to.
6. the pulse optical fiber according to claim 1 based on relaxation effect, it is characterised in that：The optical module packet
It includes and further includes bundling device, the quantity of pump diode is multiple, and pump diode reconnects high reflective after bundling device closes beam
Grid.
7. according to the pulse optical fiber based on relaxation effect described in claim 6 and 1, it is characterised in that：It is described high anti-
The optical fiber of grating and low reflective grid is double-clad structure, and the two, which combines, forms resonator, and fibre core has reflex to laser,
High reflective grid reflectivity 95%-100%, low reflective grid reflectivity 10%-30%.
8. the pulse optical fiber based on relaxation effect according to claim 7, it is characterised in that：The gain fibre is
Double-clad structure, fibre core is doped with rare earth material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810135248.7A CN108233159B (en) | 2018-02-09 | 2018-02-09 | Pulse optical fiber based on relaxation effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810135248.7A CN108233159B (en) | 2018-02-09 | 2018-02-09 | Pulse optical fiber based on relaxation effect |
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| Publication Number | Publication Date |
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| CN108233159A true CN108233159A (en) | 2018-06-29 |
| CN108233159B CN108233159B (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810135248.7A Active CN108233159B (en) | 2018-02-09 | 2018-02-09 | Pulse optical fiber based on relaxation effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872034A (en) * | 2021-12-02 | 2021-12-31 | 武汉锐科光纤激光技术股份有限公司 | Light beam generation device, method and apparatus, storage medium, and electronic apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801088A (en) * | 2011-05-26 | 2012-11-28 | 欧姆龙株式会社 | Light amplifier and laser processing device |
| CN203326345U (en) * | 2013-04-12 | 2013-12-04 | 上海飞博激光科技有限公司 | Optical fiber laser device |
| CN104201546A (en) * | 2014-09-01 | 2014-12-10 | 天津光拓伟业科技有限公司 | Fiber laser system with narrow-line-width and high-peak power pulse output |
| JP2016051897A (en) * | 2014-08-29 | 2016-04-11 | 三菱電機株式会社 | Laser device and laser processing machine |
-
2018
- 2018-02-09 CN CN201810135248.7A patent/CN108233159B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801088A (en) * | 2011-05-26 | 2012-11-28 | 欧姆龙株式会社 | Light amplifier and laser processing device |
| CN203326345U (en) * | 2013-04-12 | 2013-12-04 | 上海飞博激光科技有限公司 | Optical fiber laser device |
| JP2016051897A (en) * | 2014-08-29 | 2016-04-11 | 三菱電機株式会社 | Laser device and laser processing machine |
| CN104201546A (en) * | 2014-09-01 | 2014-12-10 | 天津光拓伟业科技有限公司 | Fiber laser system with narrow-line-width and high-peak power pulse output |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872034A (en) * | 2021-12-02 | 2021-12-31 | 武汉锐科光纤激光技术股份有限公司 | Light beam generation device, method and apparatus, storage medium, and electronic apparatus |
| CN113872034B (en) * | 2021-12-02 | 2022-05-06 | 武汉锐科光纤激光技术股份有限公司 | Light beam generation device, method and apparatus, storage medium, and electronic apparatus |
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| Publication number | Publication date |
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| CN108233159B (en) | 2019-07-30 |
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