CN101308990A - Method for generating laser pulse with adjustable pulse width - Google Patents
Method for generating laser pulse with adjustable pulse width Download PDFInfo
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- CN101308990A CN101308990A CNA2008100447819A CN200810044781A CN101308990A CN 101308990 A CN101308990 A CN 101308990A CN A2008100447819 A CNA2008100447819 A CN A2008100447819A CN 200810044781 A CN200810044781 A CN 200810044781A CN 101308990 A CN101308990 A CN 101308990A
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Abstract
The invention discloses a laser pulse generation method with adjustable pulse width, which is characterized in that the method includes the following steps: 1) inject a seed laser pulse to an optical splitter for laser splitting, the ratio and channels of the splitting is controlled by a controller; 2) each split laser controlled by the controller is input to corresponding delay unit for delay according to the requirement of the controller; 3) multiplex the delayed each spilt laser by a multiplexer to obtain a laser pulse with new pulse width. Compared with prior art, the method has the advantages of 1) large adjust range of pulse width, 2) no need of modulation, and 3) easy and convenient process. The laser pulse generation method of the invention also has the advantage that the width of the obtained width adjustable pulse laser is bigger that the width of the seed laser pulse.
Description
Technical field
The present invention relates to laser technology field, be specifically related to a kind of method that produces the width-adjustable laser pulse.
Background technology
Laser pulse width is one of important parameter of laser pulse, and the existing method that produces the different in width laser pulse has two classes, and one adopts modulation technique; Its two, adopt Q-regulating technique.
Adopt the method for modulation technique generation laser pulse, as Fig. 1.
Modulation technique mainly can be divided into direct modulation (Fig. 1 (a) is also referred to as internal modulation) and modulation (Fig. 1 (b) is also referred to as external modulation) indirectly.Directly modulation is meant that the load-modulate pulse signal goes to change laser output parameters with modulated pulse signal in the concussion process that laser produces, thereby obtains the output of laser pulse.For example, semiconductor laser is the pulse duration by the controlling and driving electric current, realizes the control of laser pulse width.Modulation is meant on the light path of laser output and places modulator indirectly, with the physical characteristic of modulated pulse signal change modulator, when laser process modulator, comes the control impuls width by the control modulator, thereby obtains the output of pulse laser.
Adopt the method for Q-regulating technique generation laser pulse, as Fig. 2.
Q-regulating technique is exactly the technology that the Q value by making optical cavity someway changes according to certain rule in time, laser output optical pulse not when laser starting of oscillation output optical pulse during high Q, low Q.Therefore by in the light path of laser, adding Q switching, initiatively transfer the laser pulse output of Q or passive Q-adjusted realization certain width by pulse.
Summary of the invention
Technical problem to be solved by this invention is how a kind of method that produces the adjustable laser pulse of pulse duration is provided, and this method is different from method of the prior art, and is simple, easy to operate, and the pulse duration adjustable extent is wide.
At the problem that proposes above, the invention provides a kind of method that produces the adjustable laser pulse of pulse duration, it is characterized in that, may further comprise the steps:
1., seed laser pulse injected optical splitter carry out beam split, the ratio and the way of beam split are controlled by controller;
2., entering corresponding delay unit through each road beam split of controller control delays time according to the requirement of controller;
3., will through the time-delay each road beam split close ripple by wave multiplexer, promptly obtain the laser pulse of new pulse duration.
Method according to the adjustable laser pulse of generation pulse duration provided by the present invention is characterized in that, described optical splitter is a kind of in optical-fiber type, optics type and the waveguide devices.
Method according to the adjustable laser pulse of generation pulse duration provided by the present invention is characterized in that, described controller constitutes for adopting common simulation circuit and digital circuit.
Method according to the adjustable laser pulse of generation pulse duration provided by the present invention is characterized in that, described wave multiplexer adopts optical-fiber type, optics type or waveguide devices.
Method according to the adjustable laser pulse of generation pulse duration provided by the present invention is characterized in that, described delay unit adopts Optical Fiber Transmission delay unit, transmission delay unit, space or medium delay unit.
The method of the laser pulse of generation pulse width variability provided by the present invention, its essence is seed laser pulse is carried out beam split, then each the road light pulse after the beam split is delayed time, ripple is closed in the light pulse after will being delayed time by wave multiplexer at last, obtains the laser pulse of new width.Obtain the laser pulse of different in width by controller control beam split and time-delay.1., the pulsewidth adjusting range is big this method advantage compared with the prior art is:; 2., need not modulation; 3., convenient and easy.And have the characteristics of the broad-adjustable pulsed laser width of acquisition greater than the seed laser pulse width.
Description of drawings
Fig. 1 is the schematic diagram that modulation technology is adjusted laser pulse width;
Fig. 2 is the schematic diagram that Q-regulating technique realizes adjusting laser pulse width;
Fig. 3 is an operation principle schematic diagram of the present invention;
Fig. 4 is the fundamental diagram of a specific embodiment of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
1., seed laser pulse is injected optical splitter carry out beam split as shown in Figure 3, the method that this produces the adjustable laser pulse of pulse duration may further comprise the steps:, the ratio and the way of beam split are controlled by controller; 2., entering corresponding delay unit through each road beam split of controller control delays time according to the requirement of controller; 3., will through the time-delay each road beam split close ripple by wave multiplexer, promptly obtain the laser pulse of new pulse duration.Wherein optical splitter is a kind of in optical-fiber type, optics type and the waveguide devices, controller constitutes for adopting common simulation circuit and digital circuit, delay unit adopts Optical Fiber Transmission delay unit, transmission delay unit, space or medium delay unit, and wave multiplexer adopts optical-fiber type, optics type or waveguide devices.
Be illustrated in figure 4 as the specific embodiment that adopts the present invention to obtain the light pulse of certain pulses width:
The laser pulse that obtains the 500ps width by the laser pulse of importing 100ps is exported, and can realize by following step according to the present invention:
(1) the seed laser light pulse of pulse duration 100ps is carried out beam split by the optical fibre light splitting device, controller control optical splitter is exported 5 tunnel light pulses, and keeps 5 tunnel light pulse light intensity identical;
(2) follow-up delay unit is injected in each road light pulse of optical splitter output respectively.Delay unit adopts fiber delay line to realize.Delay unit is delay unit 1 time-delay 0ps, delay unit 2 time-delay 100ps, the single 3 time-delay 200ps of time-delay, delay unit 4 time-delay 300ps, delay unit 5 time-delay 400ps under the control of controller;
After the light pulse of (3) 5 road delay units output was closed ripple by the optical fiber wave multiplexer, obtaining pulse duration was the laser pulse output of 500ps.
Claims (5)
1, a kind of method that produces the adjustable laser pulse of pulse duration is characterized in that, may further comprise the steps:
1., seed laser pulse injected optical splitter carry out beam split, the ratio and the way of beam split are controlled by controller;
2., entering corresponding delay unit through each road beam split of controller control delays time according to the requirement of controller;
3., will through the time-delay each road beam split close ripple by wave multiplexer, promptly obtain the laser pulse of new pulse duration.
2, the method for the adjustable laser pulse of generation pulse duration according to claim 1 is characterized in that, described optical splitter is a kind of in optical-fiber type, optics type and the waveguide devices.
3, the method for the adjustable laser pulse of generation pulse duration according to claim 1 is characterized in that, described controller constitutes for adopting common simulation circuit and digital circuit.
4, the method for the adjustable laser pulse of generation pulse duration according to claim 1 is characterized in that, described wave multiplexer adopts optical-fiber type, optics type or waveguide devices.
5, the method for the adjustable laser pulse of generation pulse duration according to claim 1 is characterized in that, described delay unit adopts Optical Fiber Transmission delay unit, transmission delay unit, space or medium delay unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100447819A CN101308990A (en) | 2008-06-24 | 2008-06-24 | Method for generating laser pulse with adjustable pulse width |
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| CNA2008100447819A CN101308990A (en) | 2008-06-24 | 2008-06-24 | Method for generating laser pulse with adjustable pulse width |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711739A (en) * | 2017-03-01 | 2017-05-24 | 北方工业大学 | Multi-waveform optical pulse synthesizer |
| CN106936062A (en) * | 2015-12-30 | 2017-07-07 | 上海微电子装备有限公司 | A kind of pulse broadening device, pulse stretching laser anneal device and method for annealing |
| CN109818242A (en) * | 2019-02-22 | 2019-05-28 | 四川沃飞光电科技有限公司 | Pulsewidth and the humorous ps pulsed laser and ns pulsed laser light-source structure of power adjustable |
| WO2020168733A1 (en) * | 2019-02-22 | 2020-08-27 | 江苏沃飞激光技术有限公司 | Nanosecond pulsed laser light source structure having tunable pulse width and power |
-
2008
- 2008-06-24 CN CNA2008100447819A patent/CN101308990A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936062A (en) * | 2015-12-30 | 2017-07-07 | 上海微电子装备有限公司 | A kind of pulse broadening device, pulse stretching laser anneal device and method for annealing |
| CN106711739A (en) * | 2017-03-01 | 2017-05-24 | 北方工业大学 | Multi-waveform optical pulse synthesizer |
| CN109818242A (en) * | 2019-02-22 | 2019-05-28 | 四川沃飞光电科技有限公司 | Pulsewidth and the humorous ps pulsed laser and ns pulsed laser light-source structure of power adjustable |
| WO2020168733A1 (en) * | 2019-02-22 | 2020-08-27 | 江苏沃飞激光技术有限公司 | Nanosecond pulsed laser light source structure having tunable pulse width and power |
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Open date: 20081119 |