CN108646403A - A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth and method - Google Patents
A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth and method Download PDFInfo
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- CN108646403A CN108646403A CN201810460588.7A CN201810460588A CN108646403A CN 108646403 A CN108646403 A CN 108646403A CN 201810460588 A CN201810460588 A CN 201810460588A CN 108646403 A CN108646403 A CN 108646403A
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- copped wave
- wave disk
- sector
- light
- pulsewidth
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
- G02B26/04—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers
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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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
-
- 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Radiation-Therapy Devices (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of arbitrarily adjustable pulse light generating devices of musec order pulsewidth, including chopper, chopper includes holder, driving motor and copped wave disk, holder is arranged on a mobile station, driving motor is arranged on holder, driving motor drives copped wave disk to be rotated with the vertical center axis of copped wave disk, the incident optical energy of light source output passes through hollow sector or is blocked by solid sector, the incident light of hollow sector on copped wave disk obtains reflected light after the first speculum and the reflection of the second speculum, reflection luminous energy passes through hollow sector or is blocked by solid sector, the present invention, which opens, discloses a kind of arbitrarily adjustable pulsed light production method of musec order pulsewidth.The present invention, which passes twice through same copped wave disk, can obtain the pulsed light of more narrow spaces；Reduce the requirement to copped wave disk duty ratio；It can be easy to operate by translational adjustment pulsewidth；It is simple in structure, it is small, it is of low cost, it is highly practical；Suitable for from ultraviolet to the light of infrared any wavelength；Damage threshold is high.
Description
Technical field
The present invention relates to chopper more particularly to a kind of arbitrarily adjustable pulse light generating devices of musec order pulsewidth, also
It is related to a kind of arbitrarily adjustable pulsed light production method of musec order pulsewidth.
Background technology
As laser is widely applied, requirement of the every profession and trade to laser is also higher and higher.In different application scenarios,
Laser is asked to use pulse or continuous working method, for pulse laser, pulsewidth according to different requirements, pulse frequency
Rate is also different.Existing musec order pulse-width regulated and the common form of chopper adjusting pulsewidth have following three kinds,
Respectively there is shortcoming：
The method of the first adjusting pulsewidth such as " application for a patent for invention number 201110066904.0, patent name：A kind of pulsewidth
The technical solution announced in adjustable solid state laser ".The program is that have the spy of polarization absorption to laser using adjusting Q crystal
Property, the tunable characteristic of pulsewidth is realized in the direction by adjusting adjusting Q crystal.Due to having used adjusting Q crystal in the program, it is desirable that output
The optical power threshold of light is relatively low, otherwise can damage crystal, on the other hand, can change output light using adjusting Q crystal adjusting pulsewidth
Frequency can not obtain the pulsed light of required parameter.
Such as " Zhao Jianchuan, Li rearguard, Guo Jing nanoseconds to microsecond turnable pulse width export CO to the method for second of adjusting pulsewidth2Swash
Light device [J] Applied Physics, 2016,6 (7):When the Ge acousto-optic modulators that 149-157. " is proposed apply RF control signal, laser
The output of the pulse laser from nanosecond to microsecond range may be implemented in device.When being disadvantageous in that using acousto-optic crsytal modulation pulsewidth,
For the laser of different wave length, different types of acousto-optic crsytal is used, and be limited to the factor of acoustooptical effect, it is desirable that acousto-optic crsytal
Length cannot be short, when acousto-optic crsytal is switched as acousto-optic Q modulation in this example, oscillation light beam needs repeatedly back and forth by Ge crystal,
Therefore it is very big that optical loss is inserted into caused by.
The method of the third adjusting pulsewidth is realized using chopper, such as Yang Junmei, Cao Zexin, Luan Yuguo, Luo Hongchao,
Plum enlightening .LD is in Shenyang Normal University's journal (natural science edition) (2016,34 (04):The pumping machinery proposed in 449-453) is cut
The design scheme of wave Q-switched laser, the pulsewidth obtained determine by motor speed, beam diameter, duty ratio, the pulsed light of acquisition
Pulsewidth is millisecond magnitude, cannot obtain the pulsed light of more narrow spaces." optics copped waves of kingdom coral (2012) based on ultrasonic motor
Ultrasonic motor model machine is designed and made in a development University of Electronic Science and Technology " texts for device, experiment test platform has been built, to cutting
The performance of wave device is tested, and test result is shown, chopper can reach basic copped wave function, and highest chopping frequency can be with
Reach 4kHz, is millisecond magnitude to pulsewidth after He-Ne laser copped waves.
In view of the deficiencies of the prior art, it is micro- to realize to propose a kind of position adjusting chopper by translation by the present invention
The arbitrarily adjustable pulsed light production method of second-time pulsewidth.
Invention content
The object of the present invention is to provide a kind of arbitrarily adjustable pulse light generating devices of musec order pulsewidth, have structure letter
It is single, it is small, it is easy to operate, it is of low cost, it is highly practical, it is suitable for from ultraviolet to the light and damage threshold of infrared any wavelength
It is worth high feature, a kind of arbitrarily adjustable pulsed light production method of musec order pulsewidth is also provided.Thus it solves in the prior art
The technical issues of apparatus structure is complicated, cumbersome, and cost is higher and can damage crystal using high power light source.
A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth, including mobile station, chopper and light source, are also wrapped
The first speculum and the second speculum are included, chopper includes holder, driving motor and copped wave disk, and holder is arranged on a mobile station,
Driving motor is arranged on holder, and driving motor drives copped wave disk to be rotated with the vertical center axis of copped wave disk, circumferential on copped wave disk
It is arranged at intervals with hollow sector and solid sector, the corresponding center of circle in hollow sector and solid sector is the central point of copped wave disk,
Hollow sector is identical with the central angle of solid sector, and the incident optical energy of light source output passes through hollow sector or hidden by solid sector
The incident light of gear, the hollow sector on copped wave disk obtains reflected light after the first speculum and the reflection of the second speculum, enters
It penetrates light and reflected light is located at different straight lines and the direction of propagation on the contrary, reflection luminous energy passes through hollow sector or hidden by solid sector
Gear, hollow sector are identical with the central angle of solid sector.
A kind of arbitrarily adjustable pulsed light production method of musec order pulsewidth, includes the following steps：
Step 1 sets the central point of copped wave disk as point O, and the intersection point of incident light and plane where copped wave disk is A, reflected light
It is B with the intersection point of the plane where copped wave disk, the angle value of the central angle of hollow sector and solid sector is θ,
Step 2, the angle value for measuring ∠ AOB are β, seek β/θ, when β/θ is more than or equal to 1, n=[β/θ], wherein []
For ceiling operator；When β/θ is less than 1, n=0,
Step 3 drives copped wave disk to be rotated with the vertical center axis of copped wave disk by driving motor,
Step 4, when n be odd number when,
If desired it turns pulsewidth down, then adjust mobile station and then adjusts the position of the central point of copped wave disk so that the angle of ∠ AOB
Angle value reduces and close to n × θ；
If desired pulsewidth is tuned up, then adjust mobile station and then adjusts the position of the central point of copped wave disk so that the angle of ∠ AOB
Angle value increases and close to (n+1) × θ；
Step 5, when n be even number when,
If desired it turns pulsewidth down, then adjust mobile station and then adjusts the position of the central point of copped wave disk so that the angle of ∠ AOB
Angle value increases and close to (n+1) × θ；
If desired pulsewidth is tuned up, mobile station is adjusted and then adjusts the position of the central point of copped wave disk so that the angle of ∠ AOB
Value reduces and close to n × θ.
The present invention compared with the existing technology, has the advantages that：
1, the pulsed light of more narrow spaces can be obtained by passing twice through same copped wave disk.
2, pulsed light pulsewidth that same copped wave examines and seizes is passed twice through only with incident light, reflected light in plane where copped wave disk
Hot spot it is related with the angle of central point line of copped wave disk, it is unrelated with duty ratio, reduce the requirement to copped wave disk duty ratio.
3, easy to operate by translational adjustment pulsewidth.
4, simple in structure, it is small, it is of low cost, it is highly practical.
5, suitable for from ultraviolet to the light of infrared any wavelength.
6, damage threshold is high.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the position view before the center position of copped wave disk is adjusted；
Fig. 3 is the position view after the center position of copped wave disk is adjusted.
Wherein：1- light sources；2- copped wave disks；3- mobile stations；The first speculums of 4-；The second speculums of 5-；6- holders；7- drives
Motor；The solid sectors 8-；The hollow sectors 9-；10- incident lights；11- reflected lights；12- pulsed lights.
Case is embodied
In order to make the purpose , technical scheme and advantage of the present invention be clearer, right below in conjunction with attached drawing and embodiment
The present invention is described in further detail.It should be appreciated that specific implementation case described herein is used only for explaining this hair
It is bright, it is not intended to limit the present invention.
As shown in Figure 1, a kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth, including mobile station 3, chopper
Further include the first speculum 4 and the second speculum 5 with light source 1, chopper includes holder 6, driving motor 7 and copped wave disk 2, branch
Frame 6 is arranged in mobile station 3, and driving motor 7 is arranged on the frame 6, and driving motor 7 drives copped wave disk 2 with the vertical of copped wave disk 2
Center axis rotation is circumferentially arranged at intervals with hollow sector 9 and solid sector 8 on copped wave disk 2, and hollow sector 9 and solid sector 8 are right
The center of circle answered is the central point of copped wave disk 2, and hollow sector 9 is identical with the central angle of solid sector 8, the incidence that light source 1 exports
Luminous energy passes through hollow sector 9 or is blocked by solid sector 8, passes through the incident light of the hollow sector 9 on copped wave disk 2 anti-through first
Obtain reflected light after penetrating mirror 4 and the reflection of the second speculum 5, incident light and reflected light be located at different straight lines and the direction of propagation on the contrary,
Reflection luminous energy passes through hollow sector 9 or is blocked by solid sector 8, and hollow sector 9 is identical with the central angle of solid sector 8.
In the present embodiment, the light path of incident light rotates in vertical plane perpendicular to copped wave disk 2, copped wave disk 2, copped wave disk
When 2 rotation, incident light may pass through hollow sector 9 or be blocked by solid sector 8, after incident light passes through hollow sector 9, through the
Obtain reflected light after one speculum 4 and the reflection of the second speculum 5, when copped wave disk 2 rotates, reflected light may pass through hollow sector 9 or
Person is blocked by solid sector 8, and then forms the pulsed light of setting pulsewidth.
Preferably, mobile station 3 can adjust the central point of copped wave disk 2 along horizontal rectilinear motion, above-mentioned horizontal linear perpendicular to
Incident light and reflected light set the central point of copped wave disk 2 as point O, and the intersection point of incident light and 2 place plane of copped wave disk is A, reflection
Light and the intersection point of the plane where copped wave disk 2 are B, and the line of A, B are not parallel to the central point of the adjusting copped wave of mobile station 3 disk 2
The direction of motion.It is furthermore preferred that the central point that mobile station 3 can also adjust copped wave disk 2 is moved along vertical straight line, the line of A, B are uneven
Row adjusts the direction of motion of the central point of copped wave disk 2 in mobile station 3.I.e. mobile station 3 can be horizontal two-dimension regulating platform, Huo Zheshui
Put down vertical three-dimensional regulation platform.
A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth, includes the following steps：
Step 1 sets the central point of copped wave disk 2 as point O, and the intersection point of incident light and 2 place plane of copped wave disk is A, reflection
The intersection point of plane where light and copped wave disk 2 is B, and the angle value of the central angle of hollow sector 9 and solid sector 8 is θ,
Step 2, the angle value for measuring ∠ AOB are β, seek β/θ, when β/θ is more than or equal to 1, n=[β/θ], wherein []
For ceiling operator；When β/θ is less than 1, n=0,
Step 3 drives copped wave disk 2 to be rotated with the vertical center axis of copped wave disk 2 by driving motor 7,
Step 4, when n be odd number when,
If desired it turns pulsewidth down, then adjust mobile station 3 and then adjusts the position of the central point of copped wave disk 2 so that ∠ AOB's
Angle value reduces and close to n × θ；
If desired pulsewidth is tuned up, then adjust mobile station 3 and then adjusts the position of the central point of copped wave disk 2 so that ∠ AOB's
Angle value increases and close to (n+1) × θ；
Step 5, when n be even number when,
If desired it turns pulsewidth down, then adjust mobile station 3 and then adjusts the position of the central point of copped wave disk 2 so that ∠ AOB's
Angle value increases and close to (n+1) × θ；
If desired pulsewidth is tuned up, mobile station 3 is adjusted and then adjusts the position of the central point of copped wave disk 2 so that the angle of ∠ AOB
Angle value reduces and close to n × θ.
In the present embodiment, for the central angle of hollow sector 9 and solid sector 8 to be 90 degree, it is 120 degree to measure ∠ AOB,
N=1 drives copped wave disk to be rotated by driving motor 7, since n is odd number, when needing to turn pulsewidth down, adjusts mobile station 3
And then adjust the position of 2 central point of copped wave disk so that angle AOB reduces and close to 1 × 90 degree (i.e. as shown in Fig. 2, adjusting copped wave disk
2 central points are moved to the left), the pulsewidth of the pulsed light of whole device output narrows；When needing to tune up pulsewidth, mobile station 3 is adjusted
And then adjust the position of 2 central point of copped wave disk so that ∠ AOB increase and (cut close to (1+1) × 90 degree as shown in Fig. 2, adjusting
2 central point of wave disk moves right), the pulsewidth of the pulsed light 12 of whole device output broadens.
Light source 1 is laser or LED light.The incident light that light source 1 exports is continuous light or pulsed light.
Specific embodiment described herein is only to be given an example to the present invention.The technical field of the invention
Technical staff can make various modifications or additions to the described embodiments or substitute, but not deviate the present invention
Marrow or surmount the range defined outside the appended claims.
Claims (2)
1. a kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth, including mobile station (3), chopper and light source (1),
It is characterized in that, further include the first speculum (4) and the second speculum (5), chopper include holder (6), driving motor (7) and
Copped wave disk (2), holder (6) are arranged in mobile station (3), and driving motor (7) is arranged on holder (6), driving motor (7) driving
Copped wave disk (2) is rotated with the vertical center axis of copped wave disk (2), and hollow sector (9) and reality are circumferentially arranged at intervals on copped wave disk (2)
Heart sector (8), hollow sector (9) and solid sector (8) corresponding center of circle are the central point of copped wave disk (2), hollow sector (9)
Identical with the central angle of solid sector (8), the incident optical energy of light source (1) output passes through hollow sector (9) or by solid sector
(8) it blocks, passes through the incident light of the hollow sector (9) on copped wave disk (2) anti-through the first speculum (4) and the second speculum (5)
Reflected light is obtained after penetrating, incident light and reflected light are located at different straight lines and the direction of propagation on the contrary, reflection luminous energy passes through hollow sector
(9) or by solid sector (8) it blocks, hollow sector (9) is identical with the central angle of solid sector (8).
2. a kind of method carrying out pulsed light generation using pulse light generating device described in claim 1, which is characterized in that packet
Include following steps：
Step 1 sets the central point of copped wave disk (2) as point O, and the intersection point of incident light and plane where copped wave disk (2) is A, reflection
The intersection point of plane where light and copped wave disk (2) is B, and the angle value of the central angle of hollow sector (9) and solid sector (8) is
θ,
Step 2, the angle value for measuring ∠ AOB are β, seek β/θ, when β/θ is more than or equal to 1, n=[β/θ], wherein [] is to take
Whole operator；When β/θ is less than 1, n=0,
Step 3 drives copped wave disk (2) to be rotated with the vertical center axis of copped wave disk (2) by driving motor (7),
Step 4, when n be odd number when,
If desired it turns pulsewidth down, then adjust mobile station (3) and then adjusts the position of the central point of copped wave disk (2) so that ∠ AOB's
Angle value reduces and close to n × θ；
If desired pulsewidth is tuned up, then adjust mobile station (3) and then adjusts the position of the central point of copped wave disk (2) so that ∠ AOB's
Angle value increases and close to (n+1) × θ；
Step 5, when n be even number when,
If desired it turns pulsewidth down, then adjust mobile station (3) and then adjusts the position of the central point of copped wave disk (2) so that ∠ AOB's
Angle value increases and close to (n+1) × θ；
If desired pulsewidth is tuned up, mobile station (3) is adjusted and then adjusts the position of the central point of copped wave disk (2) so that the angle of ∠ AOB
Angle value reduces and close to n × θ.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810460588.7A CN108646403B (en) | 2018-05-15 | 2018-05-15 | A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth and method |
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| CN201810460588.7A CN108646403B (en) | 2018-05-15 | 2018-05-15 | A kind of arbitrarily adjustable pulse light generating device of musec order pulsewidth and method |
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| CN108646403A true CN108646403A (en) | 2018-10-12 |
| CN108646403B CN108646403B (en) | 2019-11-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999885A (en) * | 2020-09-04 | 2020-11-27 | 之江实验室 | Electric control variable optical attenuation device |
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| JP2003180848A (en) * | 2001-12-20 | 2003-07-02 | Matsushita Electric Ind Co Ltd | Laser device |
| CN2938489Y (en) * | 2006-05-17 | 2007-08-22 | 北京国科世纪激光技术有限公司 | Pusewidth modutatable laser |
| CN101498416A (en) * | 2008-02-02 | 2009-08-05 | 绎立锐光科技开发(深圳)有限公司 | Emergent light color adjustable light source and method thereof |
| CN104037609A (en) * | 2014-06-16 | 2014-09-10 | 中国飞机强度研究所 | Pulse laser beam producing device |
| CN104701717A (en) * | 2013-12-10 | 2015-06-10 | 华中科技大学 | Device for improving rotary table chopper Q-switch laser performance and a Q-switch laser |
-
2018
- 2018-05-15 CN CN201810460588.7A patent/CN108646403B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003180848A (en) * | 2001-12-20 | 2003-07-02 | Matsushita Electric Ind Co Ltd | Laser device |
| CN2938489Y (en) * | 2006-05-17 | 2007-08-22 | 北京国科世纪激光技术有限公司 | Pusewidth modutatable laser |
| CN101498416A (en) * | 2008-02-02 | 2009-08-05 | 绎立锐光科技开发(深圳)有限公司 | Emergent light color adjustable light source and method thereof |
| CN104701717A (en) * | 2013-12-10 | 2015-06-10 | 华中科技大学 | Device for improving rotary table chopper Q-switch laser performance and a Q-switch laser |
| CN104037609A (en) * | 2014-06-16 | 2014-09-10 | 中国飞机强度研究所 | Pulse laser beam producing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999885A (en) * | 2020-09-04 | 2020-11-27 | 之江实验室 | Electric control variable optical attenuation device |
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