CN204947312U - Based on the adjustable pulse width fiber laser of electrooptic modulator - Google Patents
Based on the adjustable pulse width fiber laser of electrooptic modulator Download PDFInfo
- Publication number
- CN204947312U CN204947312U CN201520560663.9U CN201520560663U CN204947312U CN 204947312 U CN204947312 U CN 204947312U CN 201520560663 U CN201520560663 U CN 201520560663U CN 204947312 U CN204947312 U CN 204947312U
- Authority
- CN
- China
- Prior art keywords
- output
- input
- laser
- control circuit
- resonant cavity
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of adjustable pulse width fiber laser based on electrooptic modulator, comprise laser diode, resonant cavity, control circuit and optical isolator; The drive end of laser diode is connected to the first output of control circuit, the input of resonant cavity is connected to the output of described laser diode, the control end of resonant cavity is connected to the second output of control circuit, and the input of optical isolator is connected to the output of described resonant cavity; The input of control circuit is for receiving outside control signal.Wherein control circuit comprises diode (led) driver, electric light driver and master control borad; When master control borad detects external control instruction, produce control signal and control electric light driver and diode (led) driver, to control the pulsewidth of Output of laser, repetition rate and power.The utility model has that output pulse width is adjustable, stable performance, compact structure advantage, make it apply more flexibly, convenient.
Description
Technical field
The utility model belongs to laser equipment field, more specifically, relates to a kind of adjustable pulse width fiber laser based on electrooptic modulator, and this electrooptic modulator is the electrooptic modulator of the high power low pressure adjustable pulse width of fiberize.
Background technology
Fiber laser efficiency is high, threshold value is low, tunable, be convenient to integrated, be therefore subject to common concern.Be widely used as the most basic light source especially in the various fields such as Laser Micro-Machining, light sensing.In recent years, the appearance of various novel optical fiber device, new structure optical fiber, the research of Q adjusting optical fiber laser have also been obtained and developed fast, had promoted the development of the application technology such as laser radar, Laser Micro-Machining.Traditional active or passive Q-regulaitng laser (acousto-optic, mechanical rotating mirror and saturable absorber etc.) have formed reliable, ripe technology all.But they show shortcoming intrinsic separately: the uncontrollable modulating frequency of passive Q-adjusted fiber laser and pulse duration; Mechanical rotating mirror adjusts Q then to need huge mechanical modulator; It is large that acousto-optic Q modulation enters loss, and pulse duration is wide and non-adjustable.These respective defects, inhibit their application in the laser system of miniaturization, compact conformation, response fast.The high power low pressure pulsewidth adjustable electric optical modulator of fiberize have can with fibre system seamless link, can bear that high laser power, operating voltage are low, adjustable pulse width, respond fast, high unfailing performance and ultra-compact structure, the turnable pulse width narrow pulse fiber laser utilizing this modulator to make, there is the plurality of advantages such as compact conformation, beam quality is high, pulse duration is adjustable, cost is lower, in fields such as industry, medical treatment, national defence, there is good application prospect.
Utility model content
For above defect or the Improvement requirement of prior art, the purpose of this utility model is the fiber laser providing a kind of adjustable pulse width.
The utility model provides a kind of adjustable pulse width fiber laser based on electrooptic modulator, it is characterized in that, comprises laser diode, resonant cavity, control circuit and optical isolator; The drive end of described laser diode is connected to the first output of described control circuit, the input of described resonant cavity is connected to the output of described laser diode, the control end of described resonant cavity is connected to the second output of described control circuit, and the input of described optical isolator is connected to the output of described resonant cavity; The input of described control circuit is for receiving outside control signal.
Further, described resonant cavity comprises high reflective grid, low reflective grid and the bundling device connected successively, Active Optical Fiber and Q switched element; The first input end of described bundling device is as the input of described resonant cavity, and the second input of described bundling device connects the reflective grid of described height; The control end of described Q switched element is as the control end of described resonant cavity, and the input of described low reflective grid is connected to the output of described Q switched element, and described low reflective grid output is as the output of described resonant cavity.
Further, Q switched element is electrooptic modulator.
Further, electrooptic modulator is of coupled connections by optical fiber and described Active Optical Fiber.
Further, low reflective grid are fiber grating.
Further, Active Optical Fiber is gain fibre, and described gain fibre is yb-doped double-clad fiber.
Further, described control circuit comprises electric light driver, master control borad and diode (led) driver; The input of described master control borad is as the input of described control circuit, and the input of described diode (led) driver is connected to the first output of described master control borad, and the output of described diode (led) driver is as the first output of described control circuit; The input of described electric light driver is connected to the second output of described master control borad, and the output of described electric light driver is as the second output of described control circuit.
Further, control circuit also comprises power supply and the external controlled interface of the input being connected to described master control borad.
Compared with prior art, the beneficial effects of the utility model are:
(1) the utility model abandoned traditional Q adjusting optical fiber laser resonant cavity interpolation enter acousto-optic modulator realize pulse export way, the pulse utilizing the copped wave of coupling fiber electrooptic modulator to be used for realizing fiber laser exports, this new pulse way of output can be shorter switching time, higher extinction ratio, narrower laser pulse can be realized export, and can adjustable pulse width be realized by sequencing control, experiment shows that this scheme can obtain the pulse output of 10ns.
(2) because electrooptic modulator has shorter switching time, more easily realize precise synchronization and control, there is less time delay of opening the light in actual applications, make it have higher machining accuracy.
(3) because electrooptic modulator size has less volume and weight than acoustooptic Q-switching, the utility model is of compact construction and higher portability based on the adjustable pulse width fiber laser of electrooptic modulator.
(4) in control system circuit design, utilize microcontroller by external signal trigger laser driver and electric light two elements simultaneously.The logic processing capability utilizing microcontroller outstanding and parallel processing function fast, process multiple control command simultaneously, improves the response speed of whole control system.Integrated by some Peripheral digital circuit, the components and parts making some be separated are integrated, and improve the reliability of system simultaneously.
(5) traditional electro-optic Q switch Nd:YAG laser, through column prism group beam shaping after pumping source exports, compresses beam divergence angle and inputs laser crystal after focusing on.Laser crystal is near an end face plating high-reflecting film of pumping source, and the outgoing mirror plating part reflectance coating with the other end combines, and forms resonant cavity, makes laser produce vibration and amplifies and export.The utility model adopts coupling fiber electrooptic modulator, whole laser uses all-fiber structure, has more stable structure, higher beam quality, higher photoelectric conversion efficiency and less volume and can be non-maintaining because not having alignment constraint compared to traditional electro-optic Q switch Nd:YAG laser.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the master control borad circuit diagram of the utility model embodiment 2;
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein: 1 is laser diode, 2 is resonant cavity, and 3 is control circuit, and 4 is optical isolator, 21 is bundling device, and 22 is Active Optical Fiber, and 23 is electrooptic modulator, 25 is low reflective grid, and 24 is high reflective grid, and 31 is electric light driver, 32 is master control borad, 33 is diode (led) driver, and 35 is external controlled interface, and 34 is power supply.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
The utility model provides a kind of adjustable pulse width fiber laser based on electrooptic modulator, and it has the advantage that pulsewidth can adjust flexibly, makes that it is applied more flexibly, working (machining) efficiency is higher; Apply more extensive.
Fig. 1 shows the structure of the adjustable pulse width fiber laser based on electrooptic modulator that the utility model provides, and for convenience of explanation, illustrate only the part relevant to the utility model, details are as follows:
A kind of adjustable pulse width fiber laser based on electrooptic modulator that the utility model provides, comprises laser diode 1, laserresonator 2, control circuit 3 and optical isolator 4; Laser diode 1 is for generation of pumping laser; Resonant cavity 2 is for converting pumping laser to laser; Control circuit 3, for accessing external signal to arrange the pulsewidth of Output of laser, repetition rate and power, realizes the control exported laser.
Wherein, laserresonator 2 comprises bundling device 21, Active Optical Fiber 22, electrooptic modulator 23, high reflective grid 24 and low reflective grid 25, and the first input end of bundling device 21 is connected to the output of laser diode 1, and the second input of bundling device 21 connects high reflective grid 24; The input of Active Optical Fiber 22 is connected to the output of bundling device 21, and the signal input part of electrooptic modulator 23 is connected to the output of Active Optical Fiber 22, and the control end of electrooptic modulator 23 is connected to the output of electric light driver 31; The input of low reflective grid 25 is connected to the output of electrooptic modulator 23; The input of optical isolator 4 is connected to the output of low reflective grid 25.
In the utility model, low reflective grid 25 can be fiber grating.Active Optical Fiber 22 is gain fibre, and gain fibre can be double-cladding doped fiber.Exporting Transmission Fibers can be undoped optical fiber, and its core diameter and numerical aperture and front end welding optic fibre match, and ensure high-transmission efficiency between the two.
Control circuit 3 comprises the electric light driver 31 be electrically connected successively, master control borad 32 and diode (led) driver 33; When master control borad 32 detects external control instruction, produce control signal and control electric light driver 31 and diode (led) driver 33, to control the pulsewidth of Output of laser, repetition rate and power.Wherein diode (led) driver 33 is electrically connected with laser diode 1, and electric light driver 31 is electrically connected with electrooptic modulator 23, and master control borad 32 is electrically connected with diode (led) driver 33, electric light driver 31.Diode (led) driver 33 produces pumping laser for driving laser diode 1; Electrooptic modulator 31 for continuous laser is modulated into pulse laser, and realizes pulsewidth, frequency-adjustable.
In the utility model, laserresonator by can produce photon gain media, photon is fed back, and carry out the resonant cavity of resonance amplification and the pumping source of exciting light transition and laser diode composition in the gain medium.The positive feedback mechanism that wherein resonant cavity is made up of the reflective grid of height (HR) and low reflective grid (LR) forms.For realizing the Laser output of pulsed, in resonant cavity, adding electrooptic modulator (EOM) device as Q-switch, by the periodically-varied loss of resonator, realizing adjustable Q laser pulse and exporting.
In the utility model, Q-switch can be that the combination of two electrooptic modulators is to realize pulsewidth, frequency-adjustable more flexibly.
Wherein, Q switched element is coupling fiber electrooptic modulator; Its two ends are coupling fiber, directly can follow other optical fiber or optical fibre device welding.
Master control borad 32 can adopt microcontroller U1, and as shown in Figure 2, microcontroller U1 has the J1 of signal input part, control signal output J2, J3; Wherein, interface J1 connects external control signal, and interface J2 is connected with diode (led) driver 33, and interface J3 is connected with electric light driver 31.Wherein, electric light driver 31 can be high-voltage pulse power source.
Aforesaid this based in the adjustable pulse width fiber laser of electrooptic modulator, pumping source comprises m pump laser, and m is natural number.M is 1,2,3,4,5.......
Aforesaid this based in the adjustable pulse width fiber laser of electrooptic modulator, be provided with the high reverse--bias grating, (N+1) * 1 bundling device, gain fibre and the antiradar reflectivity fiber grating that connect successively in described resonant cavity, m pumping end (m is less than or equal to N) of described bundling device is connected to a described m pump laser; Antiradar reflectivity fiber grating is connected with the input of electrooptic modulator.
Aforesaid this based in the adjustable pulse width fiber laser of electrooptic modulator, described gain fibre is doping double-cladding optical fiber.
Aforesaid this based in the adjustable pulse width fiber laser of electrooptic modulator, coupling fiber electrooptic modulator two ends are coupling fiber, and directly can follow other optical fibre device welding, modulating frequency 5kHz mono-100kHz is adjustable.
Aforesaid this based in the adjustable pulse width fiber laser of electrooptic modulator, described electric light driver is low-tension supply.
Compared with prior art, the beneficial effects of the utility model are (please with above echoing) herein:
(1) the utility model abandoned traditional Q adjusting optical fiber laser resonant cavity interpolation enter acousto-optic modulator realize pulse export way, the pulse utilizing the copped wave of coupling fiber electrooptic modulator to be used for realizing fiber laser exports, this new pulse way of output can be shorter switching time, higher extinction ratio, can realize narrower laser pulse to export, experiment shows that this scheme can obtain the pulse output of 10ns.
(2) because electrooptic modulator has shorter switching time, more easily realize precise synchronization and control, there is less time delay of opening the light in actual applications, make it have process velocity faster.
(3) because electrooptic modulator size has less volume and weight than acoustooptic Q-switching, the utility model is of compact construction and higher portability based on the adjustable pulse width fiber laser of electrooptic modulator.
(4) in control system circuit design, utilize microcontroller by external signal trigger laser driver and electric light two elements simultaneously.The logic processing capability utilizing microcontroller outstanding and parallel processing function fast, process multiple control command simultaneously, improves the response speed of whole control system.Integrated by some Peripheral digital circuit, the components and parts making some be separated are integrated, and improve the reliability of system simultaneously.
(5) traditional electro-optic Q switch Nd:YAG laser, through column prism group beam shaping after pumping source exports, compresses beam divergence angle and inputs laser crystal after focusing on.Laser crystal is near an end face plating high-reflecting film of pumping source, and the outgoing mirror plating part reflectance coating with the other end combines, and forms resonant cavity, makes laser produce vibration and amplifies and export.The utility model adopts coupling fiber electrooptic modulator, whole laser uses all-fiber structure, has more stable structure, higher beam quality, higher photoelectric conversion efficiency and less volume compared to traditional electro-optic Q switch Nd:YAG laser.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of adjustable pulse width fiber laser based on electrooptic modulator, comprises laser diode 1, resonant cavity 2, control circuit 3 and optical isolator 4; Wherein, resonant cavity 2 comprises bundling device 21, Active Optical Fiber 22, electrooptic modulator 23, high reflective grid 24 and low reflective grid 25; Wherein laser diode 1, bundling device 21, Active Optical Fiber 22, electrooptic modulator 23, low reflective grid 25 are coaxially connected successively with optical isolator 4.High reflective grid 24 are connected to another input of bundling device 21;
Electrooptic modulator 23 is by electric light driver drives; Laser diode 1 is for generation of pumping laser; Resonant cavity 2 is for converting pumping laser to continuous laser; Electrooptic modulator 23 is for being modulated into pulse laser by continuous laser, and modulated laser output frequency; Control circuit 3 comprises diode (led) driver 33, electric light driver 31, master control borad 32, wherein diode (led) driver 33 is electrically connected with laser diode 1, electric light driver 31 is electrically connected with electrooptic modulator 23, and master control borad 32 is electrically connected with diode (led) driver 33, electric light driver 31.
Diode (led) driver 33, for driving laser diode, produces pumping laser; Electric light driver 31, for driving electrooptic modulator 23, makes electrooptic modulator 23 that continuous laser is modulated into pulse laser, and according to different input signals, realizes different Laser outputs; When master control borad 32 detects external control instruction, produce control signal and control electric light driver 31 and diode (led) driver 33, to control the pulsewidth of Output of laser, repetition rate and power.
It is natural number that pumping source comprises m laser diode 1, m.
Be provided with the reflective grid 24 of the height connected successively in resonant cavity, (N+1) * 1 bundling device 21, Active Optical Fiber 22, electrooptic modulator 23 and low anti-fiber grating 25, m pumping end of bundling device 21, m is less than or equal to N and is connected to m laser diode 1; Low anti-fiber grating 25 is connected with the input of optical isolator 4.Active Optical Fiber 22 can be doping double-cladding optical fiber.
We adopt this structure, obtain average power 5W, pulse duration 10ns-100ns, the pulse laser of repetition rate 5-100KHz.
The above embodiment only have expressed a kind of execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. based on an adjustable pulse width fiber laser for electrooptic modulator, it is characterized in that, comprise laser diode (1), resonant cavity (2), control circuit (3) and optical isolator (4);
The drive end of described laser diode (1) is connected to the first output of described control circuit (3), the input of described resonant cavity (2) is connected to the output of described laser diode (1), the control end of described resonant cavity (2) is connected to the second output of described control circuit (3), and the input of described optical isolator (4) is connected to the output of described resonant cavity (2); The input of described control circuit (3) is for receiving outside control signal.
2. adjustable pulse width fiber laser as claimed in claim 1, it is characterized in that, described resonant cavity (2) comprises high reflective grid (24), low reflective grid (25) and the bundling device (21) connected successively, Active Optical Fiber (22) and Q switched element;
The first input end of described bundling device (21) is as the input of described resonant cavity (2), and the second input of described bundling device (21) connects the reflective grid of described height (24);
The control end of described Q switched element is as the control end of described resonant cavity (2), the input of described low reflective grid (25) is connected to the output of described Q switched element, and described low reflective grid (25) output is as the output of described resonant cavity (2).
3. adjustable pulse width fiber laser as claimed in claim 2, it is characterized in that, described Q switched element is electrooptic modulator (23).
4. adjustable pulse width fiber laser as claimed in claim 3, it is characterized in that, described electrooptic modulator (23) is of coupled connections by optical fiber and described Active Optical Fiber (22).
5. adjustable pulse width fiber laser as claimed in claim 2, it is characterized in that, described low reflective grid (25) are fiber grating.
6. adjustable pulse width fiber laser as claimed in claim 2, it is characterized in that, described Active Optical Fiber (22) is gain fibre, and described gain fibre is yb-doped double-clad fiber.
7. the adjustable pulse width fiber laser as described in any one of claim 1-6, is characterized in that, described control circuit (3) comprises electric light driver (31), master control borad (32) and diode (led) driver (33); The input of described master control borad (32) is as the input of described control circuit (3), the input of described diode (led) driver (33) is connected to the first output of described master control borad (32), and the output of described diode (led) driver (33) is as the first output of described control circuit (3); The input of described electric light driver (31) is connected to the second output of described master control borad (32), and the output of described electric light driver (31) is as the second output of described control circuit (3).
8. adjustable pulse width fiber laser as claimed in claim 7, it is characterized in that, described control circuit (3) also comprises power supply (34) and the external controlled interface (35) of the input being connected to described master control borad (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520560663.9U CN204947312U (en) | 2015-07-29 | 2015-07-29 | Based on the adjustable pulse width fiber laser of electrooptic modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520560663.9U CN204947312U (en) | 2015-07-29 | 2015-07-29 | Based on the adjustable pulse width fiber laser of electrooptic modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204947312U true CN204947312U (en) | 2016-01-06 |
Family
ID=55014705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520560663.9U Expired - Fee Related CN204947312U (en) | 2015-07-29 | 2015-07-29 | Based on the adjustable pulse width fiber laser of electrooptic modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204947312U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333572A (en) * | 2018-03-07 | 2018-07-27 | 西安电子科技大学 | It is a kind of can improving laser search radar and scanning laser radar sweep speed method |
| CN111146679A (en) * | 2019-12-18 | 2020-05-12 | 中国科学院福建物质结构研究所 | Laser sum frequency device |
| CN111370985A (en) * | 2020-03-12 | 2020-07-03 | 北京航天控制仪器研究所 | Pulse width adjusting system of active Q-switched optical fiber laser |
| CN112271543A (en) * | 2020-09-29 | 2021-01-26 | 北京卓镭激光技术有限公司 | Active Q-switched laser and pulse width modulation method thereof |
-
2015
- 2015-07-29 CN CN201520560663.9U patent/CN204947312U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333572A (en) * | 2018-03-07 | 2018-07-27 | 西安电子科技大学 | It is a kind of can improving laser search radar and scanning laser radar sweep speed method |
| CN108333572B (en) * | 2018-03-07 | 2021-05-04 | 西安电子科技大学 | Method capable of improving scanning rate of laser search radar and laser scanning radar |
| CN111146679A (en) * | 2019-12-18 | 2020-05-12 | 中国科学院福建物质结构研究所 | Laser sum frequency device |
| CN111370985A (en) * | 2020-03-12 | 2020-07-03 | 北京航天控制仪器研究所 | Pulse width adjusting system of active Q-switched optical fiber laser |
| CN112271543A (en) * | 2020-09-29 | 2021-01-26 | 北京卓镭激光技术有限公司 | Active Q-switched laser and pulse width modulation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204947312U (en) | Based on the adjustable pulse width fiber laser of electrooptic modulator | |
| CN103050873A (en) | High-power pulse type ytterbium-doped all-fiber laser system | |
| CN103414093A (en) | All-fiber pulsed laser | |
| CN109802290B (en) | Intermediate infrared ultrashort pulse fiber laser based on synchronous mode locking | |
| CN103701021A (en) | All-fiber pulse laser utilizing cross modulation of resonant cavities | |
| CN105428975A (en) | High-power femtosecond fiber laser device | |
| CN105006732A (en) | Medium and small power LD parallelly pumped high-power green laser | |
| CN109346911A (en) | A kind of tens of megahertzs of Gao Zhongying nanoseconds full optical fiber laser amplifier | |
| CN103151684A (en) | Pulse pump type standing wave resonant cavity nanosecond pulse laser | |
| CN103701022A (en) | Double-resonant-cavity all-optical-fiber mode-locked pulse laser | |
| CN104143757A (en) | Wavelength tunable narrow linewidth light source based on DBR laser | |
| CN111404005A (en) | All-fiber mode-locked fiber laser | |
| CN205248608U (en) | High power flies a second fiber laser | |
| CN202103307U (en) | All-fiber Q-switched fiber laser | |
| CN202059040U (en) | Passively Q-switched fiber laser for linear chamber | |
| CN209200369U (en) | One kind being based on the electric-optically Q-switched all solid state laser of MgO:LN crystal prebias | |
| CN203242913U (en) | High-power pulse type ytterbium-doped all-fiber laser system | |
| CN209434593U (en) | A kind of long-pulse green light laser | |
| CN203056358U (en) | Pulse pumping type standing wave resonant cavity nanosecond pulse laser device | |
| CN204441699U (en) | A kind of pulse optical fiber | |
| CN207910227U (en) | A kind of compound dual-cavity laser of all -fiber pulse | |
| CN203150894U (en) | Pulse pump type annular resonant cavity nanosecond pulse laser device | |
| CN102208740A (en) | Nanosecond pulse fiber laser with circle structure | |
| CN203631964U (en) | 976nm Q-switching and mode-locked laser system | |
| CN104393474A (en) | Narrow-pulse-width laser device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |