CN204883095U - Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width - Google Patents
Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width Download PDFInfo
- Publication number
- CN204883095U CN204883095U CN201520551707.1U CN201520551707U CN204883095U CN 204883095 U CN204883095 U CN 204883095U CN 201520551707 U CN201520551707 U CN 201520551707U CN 204883095 U CN204883095 U CN 204883095U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- switch
- optic
- voltage
- low
- 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 Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width is moved back by two low -voltages and presses the online lightning of transmission -type optic fibre and transfer the Q -switch optical assembly to establish ties, moves back voltage source and a booster power drive with one respectively, and two powers are by a delay control circuit control, and the voltage that both exported is the same with the frequency pulse width of signal, but the signal time have the delay, delay time is at pulse width within range continuously adjustable. The switching time is all extremely short, and representative value 5 -10ns has overcome ordinary power and has closed not dead shortcoming, has improved the extinction ratio of switch, and whole pulse width continuously adjustable in wide region very, has increased the range of application of product, greatly reduce electro -optical crystal operating voltage simultaneously in the design, improved product reliability, the cost is reduced, the Q -switch is transferred to the lightning of optic fibreization, and the integrated level is higher, and it is more convenient to use, all there is huge superiority in structure and performance.
Description
Technical field
The utility model relates to Fibre Optical Sensor, optical fiber communication, Laser Processing, medical treatment, military affairs, field of scientific study, especially as the online electro-optic Q switch of a kind of low-voltage transmission-type adjustable pulse width optical fiber of fiber laser core devices.
Background technology
In fields such as modern Fibre Optical Sensor, optical fiber communication, Laser Processing, medical treatment, military affairs, scientific researches, the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber is a kind of key components.Electric-optically Q-switched is the electrooptical effect utilizing crystal, changes being added with incident light polarization state in single order step voltage situation, regulates the loss of laser resonant cavity, controls luminous energy accumulation, release.Continuous or the pulsed laser energy generally exported is compressed in the extremely narrow pulse of width and launches, greatly improve the peak power of light source.But electro-optic Q switch volume conventional is at present large, frequency is low, and half-wave voltage is higher, needs the high-voltage pulse of several kilovolts to drive, causes interference to other electric wire Louis.Single electrooptical switching easily closes not dead in addition, and the power switch time is asymmetric, and the opening time short then shut-in time is long, and the shut-in time, short then opening time was long, and switching speed is slow, and make extinction ratio low, peak power does not increase.
Utility model content
The purpose of this utility model is to provide that structure is simple, volume is little, frequency is high, driving voltage is low, switching speed is all very fast and can obtain very high extinction ratio and the online electro-optic Q switch of transmission-type optical fiber of adjustable pulse width.
To achieve these goals, the utility model adopts following technical scheme: the online electro-optic Q switch of a kind of low-voltage transmission-type adjustable pulse width optical fiber moves back pressure transmission-type optical fiber online electro-optic Q switch optical assembly 3 and the second low-voltage by the first low-voltage and moves back the online electro-optic Q switch optical assembly 4 of pressure transmission-type optical fiber and be cascaded and form.First low-voltage is moved back pressure transmission-type optical fiber online electro-optic Q switch optical assembly 3 and the second low-voltage and is moved back the online electro-optic Q switch optical assembly 4 of pressure transmission-type optical fiber and move back voltage source and a booster power driving with one respectively, two power supplys are controlled by a delay control circuit, the voltage that both export is identical with the frequency Pulse Width of signal, but signal time has delay, time delay is continuously adjustabe in pulse duration range.
First low-voltage is moved back pressure transmission-type optical fiber online electro-optic Q switch 3 and is moved back with the second low-voltage and press the online electro-optic Q switch 4 of transmission-type optical fiber to be communicated with by diaphragm 5 free space, and diaphragm also can be used two optical fiber collimator groups instead and connects herein.
The positive electrode that first low-voltage moves back the online electro-optic Q switch 3 of pressure transmission-type optical fiber is connected with the positive and negative electrode moving back pressure-controlled power supply 7 respectively with negative electrode; Second low-voltage moves back positive electrode and the negative electrode of the online electro-optic Q switch 4 of pressure transmission-type optical fiber, is connected respectively with the both positive and negative polarity of boosting rectifier control power supply 8.
Boosting rectifier control power supply with move back pressure-controlled power supply, by delay circuit plate 9 control signal time delay, control two electric power output voltage signal frequencies identical and have delay, time delay is continuously adjustabe within the specific limits.Move back pressure-controlled power supply, boosting rectifier control power supply and delay circuit control panel to substitute with the power supply that three is integrated together.
The first described low-voltage is moved back the online electro-optic Q switch of pressure transmission-type optical fiber 3 and is comprised the first optical fiber collimator 1, first birefringece crystal 10, electroded first electro-optic crystal 11 and the second birefringece crystal 12; Repetition frequency 1Hz-100KHz fixes or adjustable; Pressure drop time is less than 10ns, and representative value is 5-8ns, and the first electro-optic crystal length to height ratio is through design, and its operating voltage is less than 1500V, and representative value is 500V-900V, can bear several watts of continuous or high power pulsed ion beams laser.
The second described low-voltage is moved back pressure transmission-type optical fiber online electro-optic Q switch 4 and is comprised the 3rd birefringece crystal 13, electroded second electro-optic crystal 14, the 4th birefringece crystal 15 and the second optical fiber collimator 2, repetition frequency 1Hz-100KHz and to fix or adjustable; Rise time is less than 10ns, and representative value is 5-8ns, and the second electro-optic crystal length to height ratio is through design, and its operating voltage is less than 1500V, and representative value is 500V-900V, can bear several watts of continuous or high power pulsed ion beams laser.
Preferably, two supply voltages can be identical according to the slenderness ratio of electro-optic crystal, also can be different, and frequency is identical.
Preferably, the online electro-optic Q switch both sides of low-voltage transmission-type adjustable pulse width optical fiber are inputted by the first single fiber collimating apparatus tail optical fiber 1 and export with the 3rd single fiber collimating apparatus tail optical fiber 2.
Preferably, the first described single fiber collimating apparatus and the tail optical fiber of the second single fiber collimating apparatus can be common single fiber, multimode optical fiber, doubly clad optical fiber, polarization maintaining optical fibre.
Preferably, the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber can bear several watts continuously or high power pulsed ion beams laser, and repetition frequency 1Hz-100KHz fixes or adjustable; The opening and closing time is symmetrical and all very short, and switching time is less than 10ns, and representative value is 5-8ns, and pulsewidth arbitrary continuation in the scope that 5ns-100ms is very wide is adjustable or fixing.
For convenience of discussing, herein with a set of booster power with a set ofly move back voltage source, the signal delay time controlling two power supplys with delay circuit is that example sets forth embodiment.
Owing to have employed such scheme, all shorter between the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber of the High Extinction Ratio that the utility model provides, typical time period 5ns-8ns, extinction ratio height >28dB, pulsewidth 5ns-100ms is adjustable, the frequency of switch is adjustable at 1Hz-100kHz, half-wave voltage is being less than 1500V, representative value is 500V-900V, greatly reduce high voltage to the electromagnetic effect of product and thermal effect, improve the reliability of product, reduce cost, the online encapsulating structure of small size optical fiber simultaneously, greatly improve product flexibility and range of application.Stuctures and properties all has an enormous advantage, is widely used in the fields such as Fibre Optical Sensor, optical fiber communication, Laser Processing, medical treatment, military affairs, scientific research.
Accompanying drawing explanation
Fig. 1 is the structural representation of the online electro-optic Q switch of a kind of low-voltage transmission-type adjustable pulse width optical fiber.
Fig. 2 is the structural representation that the first low-voltage moves back the online electro-optic Q switch of pressure transmission-type optical fiber.
Fig. 3 is the structural representation that the second low-voltage moves back the online electro-optic Q switch of pressure transmission-type optical fiber.
Fig. 4 is power supply signal of the present utility model and transmitted optical power relation schematic diagram
Embodiment
As shown in Figure 1, the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber moves back pressure transmission-type optical fiber online electro-optic Q switch 3 and the second low-voltage by the first low-voltage and moves back the online electro-optic Q switch 4 of pressure transmission-type optical fiber and be cascaded; The positive electrode that first low-voltage moves back the online electro-optic Q switch 3 of pressure transmission-type optical fiber is connected with the positive and negative electrode moving back pressure-controlled power supply 7 respectively with negative electrode; Second low-voltage moves back positive electrode and the negative electrode of the online electro-optic Q switch 4 of pressure transmission-type optical fiber, is connected respectively with the both positive and negative polarity of boosting rectifier control power supply 8; Boosting rectifier control power supply with move back pressure-controlled power supply by delay circuit plate 9 control signal time delay.
During concrete enforcement, first low-voltage is moved back pressure transmission-type optical fiber online electro-optic Q switch 3 and second low-voltage to move back the online electro-optic Q switch 4 of pressure transmission-type optical fiber and be fixed in stationary housing 6, the positive and negative lead wires of two Q-switchs is drawn in housing, is connected respectively with two both positive and negative polarities controlling power supply.
As shown in Figure 2, light beam enters the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber from incident optical 1, within the t1 time, first low-voltage is moved back on the online electro-optic Q switch of pressure transmission-type optical fiber and is added with half-wave voltage, be in the first Q-switch and be in closed condition, now the second low-voltage is moved back the online electro-optic Q switch of pressure transmission-type optical fiber and is in zero-voltage state always, be in conducting state, but both series connection, one closes complete shut-down, the online electro-optic Q switch of whole low-voltage transmission-type adjustable pulse width optical fiber is in closed condition, extinction ratio is the highest, the resonator cavity internal loss participating in being formed is maximum.
In the beginning moment of t2 time, the half-wave voltage that first low-voltage moves back the online electro-optic Q switch of pressure transmission-type optical fiber is decorporated instantaneously, light path is opened, light can move back pressure transmission-type optical fiber online electro-optic Q switch from the first low-voltage and incide the second low-voltage and move back in the online electro-optic Q switch of pressure transmission-type optical fiber, now the second low-voltage is moved back the online electro-optic Q switch of pressure transmission-type optical fiber and is still in zero-voltage state, light path is still in open mode, make the complete conducting of the online electro-optic Q switch of whole low-voltage transmission-type adjustable pulse width optical fiber, the loss of resonator participating in being formed in fiber ring laser system is minimum, thus can resonance oscillation be formed, produce Laser output.
Within the t3 time, the first low-voltage is moved back the online electro-optic Q switch of pressure transmission-type optical fiber and is still in zero-voltage state or starts slowly to raise, and this time still can be moved back the online electro-optic Q switch of pressure transmission-type optical fiber from the first low-voltage and be passed through; But the moment when the t3 time starts, the second low-voltage is moved back the online electro-optic Q switch voltage instantaneous of pressure transmission-type optical fiber and increased to half-wave voltage, make the second low-voltage move back the online electro-optic Q switch of pressure transmission-type optical fiber and end instantaneously, light cannot pass therethrough.Make the online electro-optic Q switch light path of whole low-voltage transmission-type adjustable pulse width optical fiber be in closed condition, extinction ratio is the highest, and the resonator cavity internal loss participating in being formed is maximum.
Within the t4 time, first low-voltage is moved back the online electro-optic Q switch of pressure transmission-type optical fiber and is coupled with half-wave voltage, it is made to be in closed condition, now the second low-voltage is moved back and is pressed the half-wave voltage of the online electro-optic Q switch of transmission-type optical fiber to start to decorporate, it is made slowly to start conducting, but two switching effect superpositions, make the online electro-optic Q switch of whole low-voltage transmission-type adjustable pulse width optical fiber be in closed condition, extinction ratio reaches the highest, and the resonator cavity internal loss participating in being formed is maximum.
After the t3 time, the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber completes a switch periods, again enters the t1 time in next cycle.
Wherein the t2 time can be regulated by delay control circuit, and arbitrary continuation is adjustable in the pulse duration range moving back voltage source.The frequency of simultaneously moving back voltage source and booster power self can load arbitrarily from 1Hz-100kHz, so the pulsewidth of moving back voltage source and booster power also can set within the scope of 1s-10 μ s.So, in theory according to moving back the minimum delay precision of voltage source pulsewidth and delay circuit, the t2 time can in the scope that 1ns-1s is even wider arbitrary continuation adjustable or fixing.Consider actual time delay precision and the scope of delay circuit, and practical application angle, the representative value of our working control t2 time is 1ns-1ms.Namely the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber pulsewidth can within the scope of 1ns-1ms arbitrary continuation adjustable or fixing.
For desired location is fixed; the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber connecting light path is encapsulated in modular cartridge; the electrode cable exposed is connected with corresponding power electrode respectively; for playing better protective effect to preliminary packaging part, can as required by the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber, booster power, move back voltage source and delay control circuit does outer enclosure again.
The online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber of the High Extinction Ratio that the utility model provides overcome single electrooptical switching close dead, the power switch time is asymmetric and the slow problem of switching speed, its switching time can be extremely short, typical time period 5ns-8ns, substantially increase the extinction ratio of electro-optic Q switch, extinction ratio height >28dB, improves laser peak power.Simultaneously the pulsewidth of the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber in theory can in any range continuously adjustabe, pulsewidth representative value of the present utility model is 5ns-100ms.
The online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber of the High Extinction Ratio that the utility model provides, modulating frequency is high and adjustable in 1Hz-100KHz, is that conventional electric-optically Q-switched tens Hz are to tens times of several thousand Hz modulating frequencies to hundred times; Half-wave voltage is being less than 1500V, and representative value is 500V-900V, the driving voltage of the 3000V-4000V electric-optically Q-switched far below routine; Greatly reduce high voltage to the electromagnetic effect of product and thermal effect, improve the reliability of product, reduce cost; Pulsewidth is adjustable in the scope that 5ns-100ms is very wide simultaneously; And the online encapsulating structure of small size optical fiber, all greatly improve product flexibility and range of application.Stuctures and properties all has an enormous advantage, and the core devices as pulsed laser is widely used in the fields such as Fibre Optical Sensor, optical fiber communication, Laser Processing, medical treatment, military affairs, scientific research.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber, it is characterized in that first, second low-voltage is moved back the online electro-optic Q switch optical assembly of pressure transmission-type optical fiber and is cascaded, voltage source and a booster power driving is moved back respectively with one, two power supplys are controlled by a delay control circuit, the voltage that both export is identical with the frequency Pulse Width of signal, but signal time has delay, time delay is continuously adjustabe in pulse duration range.
2. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber according to claim 1, it is characterized in that two low-voltages are moved back in the middle of the online electro-optic Q switch of pressure transmission-type optical fiber and add the direct free space connection of a diaphragm, also can be connected by two optical fiber collimators.
3. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 1, is characterized in that the first low-voltage is moved back and presses the positive electrode of the online electro-optic Q switch of transmission-type optical fiber to be connected with the positive and negative electrode moving back voltage source respectively with negative electrode; Second low-voltage moves back positive electrode and the negative electrode of the online electro-optic Q switch of pressure transmission-type optical fiber, is connected respectively with the both positive and negative polarity of boosting rectifier control power supply.
4. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 1, it is characterized in that boosting rectifier control power supply and move back pressure-controlled power supply by delay circuit control signal time delay, moving back pressure-controlled power supply, boosting rectifier control power supply and delay circuit control panel can substitute with control circuit three be integrated together or module.
5. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 1, it is characterized in that the first low-voltage moves back that pressure transmission-type optical fiber online electro-optic Q switch comprises the first optical fiber collimator, the first birefringece crystal, moves back voltage source, electroded first electro-optic crystal and the second birefringece crystal, move back voltage source pressure drop time and be less than 10ns, repetition frequency 1Hz-100KHz fixes or adjustable; Electro-optic crystal length to height ratio is through design, and its operating voltage can be arranged arbitrarily within the scope of 400V-1500V, and can bear several watts of continuous or high power pulsed ion beams laser.
6. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 1, it is characterized in that the second low-voltage is moved back pressure transmission-type optical fiber online electro-optic Q switch optical assembly and comprised the 3rd birefringece crystal, electroded second electro-optic crystal, the 4th birefringece crystal and the second optical fiber collimator, repetition frequency 1Hz-100KHz fixes or adjustable; Booster power voltage rising time is less than 10ns, and electro-optic crystal length to height ratio is through design, and its operating voltage can be arranged arbitrarily within the scope of 400V-1500V, and can bear several watts of continuous or high power pulsed ion beams laser.
7. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 5, is characterized in that the tail optical fiber of the first described optical fiber collimator can be single-mode fiber, multimode optical fiber, doubly clad optical fiber, polarization maintaining optical fibre.
8. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 6, is characterized in that the tail optical fiber of the second described optical fiber collimator can be single-mode fiber, multimode optical fiber, doubly clad optical fiber, polarization maintaining optical fibre.
9. the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber as claimed in claim 1, it is characterized in that the online electro-optic Q switch of low-voltage transmission-type adjustable pulse width optical fiber can bear several watts of continuous or high power pulsed ion beams laser, repetition frequency 1Hz-100KHz fixes or adjustable, the opening and closing time is symmetrical and all very short, switching time is all less than 10ns, and pulsewidth is continuously adjustabe or fixing in the scope that 5ns-100ms is very wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520551707.1U CN204883095U (en) | 2015-07-28 | 2015-07-28 | Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520551707.1U CN204883095U (en) | 2015-07-28 | 2015-07-28 | Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204883095U true CN204883095U (en) | 2015-12-16 |
Family
ID=54827451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520551707.1U Expired - Fee Related CN204883095U (en) | 2015-07-28 | 2015-07-28 | Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204883095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405884A (en) * | 2015-08-12 | 2017-02-15 | 光越科技(深圳)有限公司 | Low-voltage transmission-type pulse width-adjustable optical-fiber online electro-optical Q switch |
-
2015
- 2015-07-28 CN CN201520551707.1U patent/CN204883095U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405884A (en) * | 2015-08-12 | 2017-02-15 | 光越科技(深圳)有限公司 | Low-voltage transmission-type pulse width-adjustable optical-fiber online electro-optical Q switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106848816A (en) | Sequential synthesizes quasi-continuous optical fiber laser | |
| CN109066278A (en) | The two-way polymorphic soliton fiber laser of mode locking | |
| CN103042305B (en) | Timesharing beam splitting system | |
| CN109802290A (en) | Based on ultrashort pulse fiber laser infrared in synchronizing mode-licked | |
| CN102169244A (en) | Low-voltage driven electro-optical switch | |
| CN204883095U (en) | Q -switch is transferred to online lightning of adjustable optic fibre of low -voltage transmission -type pulse width | |
| CN101639602A (en) | Novel high-speed optical pulse compression system | |
| CN204947312U (en) | Based on the adjustable pulse width fiber laser of electrooptic modulator | |
| CN110061408A (en) | It mixes the preparation of chromium selenizing zinc nanoparticles saturable absorber and its constitutes full optical fiber Q-switched laser | |
| CN103594915A (en) | Impulse sequence free regulation and control laser device and method for realizing impulse sequence free regulation and control through impulse sequence free regulation and control laser device | |
| CN106405884A (en) | Low-voltage transmission-type pulse width-adjustable optical-fiber online electro-optical Q switch | |
| CN210536000U (en) | Terahertz generation device | |
| CN107302177B (en) | The passive mixed mode-locking pulse generating system of master based on black phosphorus saturable absorber | |
| CN105811227B (en) | A kind of super flat super continuous spectrums laser acquisition methods of femtosecond | |
| CN107302176B (en) | A kind of passive mixed mode-locking soliton generation system of high stability master | |
| CN108628058B (en) | On-chip integrated mid-infrared super-continuum spectrum light source | |
| CN108155553B (en) | Fine adjustable optical parametric oscillator with fast gain band switching | |
| CN105762649B (en) | Infrared super continuous spectrums laser in a kind of output of flat spectrum | |
| CN103701028A (en) | High-repetition frequency high-strength terahertz source based on double-tone coherent control plasma | |
| CN205159785U (en) | Laser beam combining device based on graded index electro -optical crystal | |
| CN103592783B (en) | Based on the laser temporal modulator of electric light photoswitch in photophoresis experimental study | |
| CN209448205U (en) | The mode-locked all-fiber laser of short cavity Gao Zhongying | |
| CN107134711B (en) | Optical pulse generator based on piezoelectric ceramics feedback control | |
| CN209104564U (en) | A kind of waveguide integrating optical modulator and including its pulsed optical fibre laser machine and a kind of pulsed optical frequency com generation and regulation device | |
| CN208571227U (en) | Multiple beam synchronizes quasi-continuous laser |
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: 20151216 Termination date: 20200728 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |