CN104752941A - Pulse width adjusting fiber laser based on UWB (Ultra Wide Band) light source - Google Patents
Pulse width adjusting fiber laser based on UWB (Ultra Wide Band) light source Download PDFInfo
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- CN104752941A CN104752941A CN201510092978.XA CN201510092978A CN104752941A CN 104752941 A CN104752941 A CN 104752941A CN 201510092978 A CN201510092978 A CN 201510092978A CN 104752941 A CN104752941 A CN 104752941A
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Abstract
The invention discloses a pulse width adjusting fiber laser based on a UWB (Ultra Wide Band) light source. The pulse width adjusting fiber laser comprises a light path module (1) and a circuit module (2); the light path module (1) comprises a UWB light source (3), a wide-band filter (4), a first optical fiber amplification device (5), an acousto-optic/electro-optical modulator (6), more than one second optical fiber amplifying device (7) and a collimated light isolator (8) which are coaxially and sequentially connected; the circuit module (2) comprises a pumping drive circuit (9), an acousto-optic/electro-optical drive circuit (10), an output control circuit (11) and a protective circuit (12), wherein the acousto-optic/ electro-optical drive circuit (10) is electrically connected with the acousto-optic/electro-optical modulator (6). The pulse width adjusting fiber laser provided by the invention has the advantages of being flexible to adjust and more flexible to apply, and being high in power and good in stability.
Description
Technical field
The present invention relates to a kind of fiber laser, particularly a kind of adjustable pulse width pulse optical fiber based on ultra broadband light source, belongs to laser equipment field.
Background technology
Traditional pulse optical fiber, feature adds switch modulation device in resonant cavity, so its laser exported exports in the mode of high energy pulse, traditional fiber laser has following two shortcomings:
Shortcoming one, the band width of traditional fiber laser, stimulated Brillouin scattering (Stimulated Brillouin Scattering, SBS) threshold power is low, when certain pulse peak power, easy generation SBS, produces high peak power and causes optical fiber to blow after amplifying, and this is that pulse optical fiber is difficult to one of basic reason realizing high power and poor reliability both at home and abroad at present.
Shortcoming two, tradition Q adjusting optical fiber laser enters acousto-optic/electrooptic modulator in resonant cavity interpolation and realizes pulse output, because pulse duration and laser resonant cavity chamber grow up to direct ratio, therefore, the pulse that tradition Q adjusting optical fiber laser can only realize fixed pulse width exports, the adjustable of laser pulse pulsewidth cannot be realized, limit the application flexibility of pulse optical fiber.
In materials processing, some key parameters affecting crudy and production capacity comprise: pulse peak power, single pulse energy (mJ), pulse frequency, average power, pulse duration and pulsewidth and beam quality (M2).Such as: when processing sensitive material, need carefully to control heat input, usually preferably adopt shorter pulse and higher repetition rate, this just requires that the laser pulse width of laser is narrow, peak power is high.And when the degree of depth is carved, best engraving quality is not but obtain when peak power is the highest, this just requires that laser device laser pulsewidth is slightly wide, peak power is lower slightly again.If user uses traditional pulse optical fiber to process the material of different qualities, in order to reach better effect, different lasers will be equipped with, considerably increase cost, and if share processing platform, need to change laser, have impact on working (machining) efficiency especially.
Summary of the invention
The object of the invention is to, provide a kind of adjustable pulse width pulse optical fiber based on ultra broadband light source, it has the advantage that pulsewidth can adjust flexibly, makes it apply more flexible, and has the advantage of power height and good stability.
Technical scheme of the present invention: a kind of adjustable pulse width pulse optical fiber based on ultra broadband light source, comprises light path module and circuit module;
Described light path module comprises the ultra broadband light source, broadband filter, the first optical fiber amplifying device, acousto-optic/electrooptic modulator, second optical fiber amplifying device of more than 1 and the collimated light isolator that coaxially connect successively;
Described circuit module comprises pumping drive circuit, acousto-optic/electric light drive circuit, output control circuit and protective circuit, and acousto-optic/electric light drive circuit is electrically connected with acousto-optic/electrooptic modulator;
Pumping drive circuit produces pumping laser for driving the first optical fiber amplifying device and the second optical fiber amplifying device; Acousto-optic/electric light drive circuit is for driving acousto-optic/electrooptic modulator, make acousto-optic/electrooptic modulator that continuous laser is modulated into pulse laser, and realize the adjustable of laser pulse pulsewidth according to the difference of signal of telecommunication pulsewidth, light pulsewidth can be realized adjustable from 3ns to continuous print; Output control circuit is used for the pulsewidth being arranged Output of laser by man-machine interface, and repetition rate and power realize the control exported laser; Protective circuit is used for light path monitoring and the protection of fiber laser.
Aforesaid this based in the adjustable pulse width pulse optical fiber of ultra broadband light source, first optical fiber amplifying device comprises the first online optical isolator and the first fiber amplifier, and the first fiber amplifier comprises the first pump laser, the first bundling device and the first gain fibre that connect successively; The pumping end of described first bundling device is connected to the first described pump laser, and the first pump laser is electrically connected with pumping drive circuit.
Aforesaid this based in the adjustable pulse width pulse optical fiber of ultra broadband light source, described second optical fiber amplifying device comprises the second online optical isolator and the second fiber amplifier, and the second fiber amplifier comprises the second pump laser, the second bundling device and the second gain fibre that connect successively; The pumping end of described second bundling device is connected to the second described pump laser, and the second pump laser is electrically connected with pumping drive circuit; Second gain fibre is connected with collimated light isolator.
Aforesaid this based in the adjustable pulse width pulse optical fiber of ultra broadband light source, described first gain fibre and the second gain fibre are yb-doped double-clad fiber.
Aforesaid this based in the adjustable pulse width pulse optical fiber of ultra broadband light source, whether the fusion point place of the second gain fibre and collimated light isolator is provided with photodetector impaired for detecting light path, can power-off immediately prevent light leak from bringing Continuous Damage to light path once optical fiber blows.
Compared with prior art, the present invention is difficult to realize the problem of high power and poor reliability in order to overcome traditional pulse laser, this invention has abandoned the high reflective grid of use and low reflective grid to produce the traditional method of seed light, take full advantage of the characteristics and advantages that ultra broadband light source SLED band is wide, the spectral bandwidth of seed light can reach and use the reflective grid of height to produce the 5-7 of seed light bandwidth doubly (use the general bandwidth of seed light of high reflective grid and low reflective grid generation for about 2nm, the seed light three dB bandwidth in the present invention is greater than 30nm).Seed light is after broadband filter and the first order amplify, and three dB bandwidth is still greater than 10nm, then after electric light/acousto-optic modulator, bandwidth narrows, but three dB bandwidth is still much larger than the seed light bandwidth using the reflective grid of height to produce, and amplifies again, and spectral bandwidth is substantially constant.Therefore, this invention greatly enhances the threshold power that SBS occurs laser every one-level, makes pulse laser can export higher power, meanwhile, effectively improves the stability of pulse optical fiber.
The present invention has abandoned traditional Q adjusting optical fiber laser and has entered in resonant cavity interpolation the way that acousto-optic modulator realizes pulse output, the pulse utilizing the copped wave of coupling fiber acousto-optic/electrooptic modulator to be used for realizing fiber laser exports, this new pulse way of output can realize the output of distinct pulse widths laser pulse according to the difference of acousto-optic under different mode/electrooptic modulator signal of telecommunication pulsewidth, thus realizing the adjustable of pulse laser pulsewidth, it is adjustable from 3ns to continuous print that experiment shows that this scheme can realize light pulse.Therefore the present invention can by the different output mode of a laser setup, realizes the adjustable of optical pulse width and peak power flexibly, substantially increases the application flexibility of pulse optical fiber.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Being labeled as in accompanying drawing: 1-light path module 2-circuit module, 3-ultra broadband light source, 4-broadband filter, 5-first optical fiber amplifying device, 6-acousto-optic/electrooptic modulator, 7-second optical fiber amplifying device, 8-collimated light isolator, 9-pumping drive circuit, 10-acousto-optic/electric light drive circuit, 11-output control circuit, 12-protective circuit, the online optical isolator of 13-first, 14-first fiber amplifier, 15-first pump laser, 16-first bundling device, 17-first gain fibre, the online optical isolator of 18-second, 19-second pump laser, 20-second bundling device, 21-second gain fibre, 22-photodetector, 23-second fiber amplifier.
Embodiment
Below in conjunction with drawings and Examples, the art of this patent is further described.
Embodiments of the invention 1: as shown in Figure 1, a kind of adjustable pulse width pulse optical fiber based on ultra broadband light source, comprises light path module 1 and circuit module 2;
Described light path module 1 comprises the ultra broadband light source 3, broadband filter 4, first optical fiber amplifying device 5, acousto-optic modulator 6, second optical fiber amplifying device 7 and the collimated light isolator 8 that coaxially connect successively; Described second optical fiber amplifying device 7 is 2.
Described circuit module 2 comprises pumping drive circuit 9, acousto-optic drive circuit 10, output control circuit 11 and protective circuit 12, and acousto-optic drive circuit 10 is electrically connected with acousto-optic modulator 6;
Pumping drive circuit 9 produces pumping laser for driving the first optical fiber amplifying device 5 and the second optical fiber amplifying device 7; Acousto-optic drive circuit 10, for driving acousto-optic modulator 6, makes acousto-optic modulator 6 that continuous laser is modulated into pulse laser, and realizes the adjustable of laser pulse pulsewidth according to the difference of signal of telecommunication pulsewidth, can realize light pulsewidth adjustable from 3ns to continuous print; Output control circuit 11, for being arranged the pulsewidth of Output of laser by man-machine interface, repetition rate and power, realizes the control exported laser; Protective circuit 12 is monitored and protection for the light path of fiber laser.
First optical fiber amplifying device 5 comprises the first online optical isolator 13 and the first fiber amplifier 14, first fiber amplifier 14 comprises the first pump laser 15 first bundling device 16 and the first gain fibre 17 connected successively; The pumping end of described first bundling device 16 is connected to the first described pump laser 15, first pump laser 15 and is electrically connected with pumping drive circuit 9.
Described second optical fiber amplifying device 7 comprises the second online optical isolator 18 and the second fiber amplifier 23, second fiber amplifier 23 comprises the second pump laser 19, second bundling device 20 and the second gain fibre 21 connected successively; The pumping end of described second bundling device 20 is connected to the second described pump laser 19, second pump laser 19 and is electrically connected with pumping drive circuit 9; Second gain fibre 21 is connected with collimated light isolator 8.Described first gain fibre 17 and the second gain fibre 21 are yb-doped double-clad fiber.Whether the second gain fibre 21 is provided with photodetector 22 with the fusion point place of collimated light isolator 8, impaired for detecting light path, can power-off immediately prevent light leak from bringing Continuous Damage to light path once optical fiber blows.
Embodiments of the invention 2: as shown in Figure 1, a kind of adjustable pulse width pulse optical fiber based on ultra broadband light source, comprises light path module 1 and circuit module 2;
Described light path module 1 comprises the ultra broadband light source 3, broadband filter 4, first optical fiber amplifying device 5, the second optical fiber amplifying device 7 of electrooptic modulator more than 6,1 and the collimated light isolator 8 that coaxially connect successively;
Described circuit module 2 comprises pumping drive circuit 9, electric light drive circuit 10, output control circuit 11 and protective circuit 12, and electric light drive circuit 10 is electrically connected with electrooptic modulator 6;
Pumping drive circuit 9 produces pumping laser for driving the first optical fiber amplifying device 5 and the second optical fiber amplifying device 7; Electric light drive circuit 10, for driving electrooptic modulator 6, makes electrooptic modulator 6 that continuous laser is modulated into pulse laser, and realizes the adjustable of laser pulse pulsewidth according to the difference of signal of telecommunication pulsewidth, can realize light pulsewidth adjustable from 3ns to continuous print; Output control circuit 11, for being arranged the pulsewidth of Output of laser by man-machine interface, repetition rate and power, realizes the control exported laser; Protective circuit 12 is monitored and protection for the light path of fiber laser.
First optical fiber amplifying device 5 comprises the first online optical isolator 13 and the first fiber amplifier 14, first fiber amplifier 14 comprises the first pump laser 15, first bundling device 16 and the first gain fibre 17 connected successively; The pumping end of described first bundling device 16 is connected to the first described pump laser 15, first pump laser 15 and is electrically connected with pumping drive circuit 9.
Described second optical fiber amplifying device 7 comprises the second online optical isolator 18 and the second fiber amplifier 23, second fiber amplifier 23 comprises the second pump laser 19, second bundling device 20 and the second gain fibre 21 connected successively; The pumping end of described second bundling device 20 is connected to the second described pump laser 19, second pump laser 19 and is electrically connected with pumping drive circuit 9; Second gain fibre 21 is connected with collimated light isolator 8.Described first gain fibre 17 and the second gain fibre 21 are yb-doped double-clad fiber.Whether the second gain fibre 21 is provided with photodetector 22 with the fusion point place of collimated light isolator 8, impaired for detecting light path, can power-off immediately prevent light leak from bringing Continuous Damage to light path once optical fiber blows.
Claims (6)
1. based on an adjustable pulse width pulse optical fiber for ultra broadband light source, it is characterized in that: comprise light path module (1) and circuit module (2);
Described light path module (1) comprises the ultra broadband light source (3), broadband filter (4), the first optical fiber amplifying device (5), acousto-optic/electrooptic modulator (6), second optical fiber amplifying device (7) of more than 1 and the collimated light isolator (8) that coaxially connect successively;
Described circuit module (2) comprises pumping drive circuit (9), acousto-optic/electric light drive circuit (10), output control circuit (11) and protective circuit (12), and acousto-optic/electric light drive circuit (10) is electrically connected with acousto-optic/electrooptic modulator (6);
Pumping drive circuit (9) produces pumping laser for driving the first optical fiber amplifying device (5) and the second optical fiber amplifying device (7); Acousto-optic/electric light drive circuit (10) is for driving acousto-optic/electrooptic modulator (6), make acousto-optic/electrooptic modulator (6) that continuous laser is modulated into pulse laser, and realize the adjustable of laser pulse pulsewidth according to the difference of signal of telecommunication pulsewidth, light pulsewidth can be realized adjustable from 3ns to continuous print; Output control circuit (11), for being arranged the pulsewidth of Output of laser by man-machine interface, repetition rate and power, realizes the control exported laser; Protective circuit (12) is monitored and protection for the light path of fiber laser.
2. the adjustable pulse width pulse optical fiber based on ultra broadband light source according to claim 1, it is characterized in that: the first optical fiber amplifying device (5) comprises the first online optical isolator (13) and the first fiber amplifier (14), the first fiber amplifier (14) comprises the first pump laser (15), the first bundling device (16) and the first gain fibre (17) that connect successively; The pumping end of described first bundling device (16) is connected to described the first pump laser (15), and the first pump laser (15) is electrically connected with pumping drive circuit (9).
3. the adjustable pulse width pulse optical fiber based on ultra broadband light source according to claim 2, is characterized in that: described first gain fibre (17) is yb-doped double-clad fiber.
4. the adjustable pulse width pulse optical fiber based on ultra broadband light source according to claim 3, it is characterized in that: described second optical fiber amplifying device (7) comprises the second online optical isolator (18) and the second fiber amplifier (23), the second fiber amplifier (23) comprises the second pump laser (19), the second bundling device (20) and the second gain fibre (21) that connect successively; The pumping end of described second bundling device (20) is connected to described the second pump laser (19), and the second pump laser (19) is electrically connected with pumping drive circuit (9); Second gain fibre (21) is connected with collimated light isolator (8).
5. the adjustable pulse width pulse optical fiber based on ultra broadband light source according to claim 4, is characterized in that: described first gain fibre (17) and the second gain fibre (21) are yb-doped double-clad fiber.
6. the adjustable pulse width pulse optical fiber based on ultra broadband light source according to claim 4, is characterized in that: the second gain fibre (21) is provided with photodetector (22) with the fusion point place of collimated light isolator (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510092978.XA CN104752941B (en) | 2014-08-25 | 2015-03-02 | Adjustable pulse width pulse optical fiber based on ultra broadband light source |
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| CN2014104210278 | 2014-08-25 | ||
| CN201410421027.8A CN104253371A (en) | 2014-08-25 | 2014-08-25 | Ultra-broadband light source-based pulse width-adjustable pulse fiber laser |
| CN201510092978.XA CN104752941B (en) | 2014-08-25 | 2015-03-02 | Adjustable pulse width pulse optical fiber based on ultra broadband light source |
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| CN201510092978.XA Active CN104752941B (en) | 2014-08-25 | 2015-03-02 | Adjustable pulse width pulse optical fiber based on ultra broadband light source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186270A (en) * | 2015-09-23 | 2015-12-23 | 深圳市欧凌镭射科技有限公司 | Picosecond pulse optical fiber laser device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107092105B (en) * | 2017-05-19 | 2018-08-17 | 深圳市创鑫激光股份有限公司 | Acousto-optic modulator, the method and laser for improving acousto-optic modulator output light energy |
| CN109981177B (en) * | 2019-04-04 | 2020-07-28 | 电子科技大学 | Single-wavelength all-optically adjustable second-order ultra-wideband signal generation method and device |
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| CN102263356A (en) * | 2011-06-03 | 2011-11-30 | 中国科学院上海光学精密机械研究所 | Single-frequency narrow linewidth polarization-maintaining all-fiber pulse laser |
| CN102263358A (en) * | 2011-06-15 | 2011-11-30 | 北京工业大学 | High-power broadband superfluorescence light source in all-fiber structure |
| CN102983483A (en) * | 2012-12-05 | 2013-03-20 | 清华大学 | All-optical fiber laser based on broadband light spectrum |
| CN103001110A (en) * | 2012-12-05 | 2013-03-27 | 清华大学 | Optical fiber laser based on broadband spectrum |
| CN203183034U (en) * | 2013-04-03 | 2013-09-11 | 首都医科大学 | Laser device and laser system |
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- 2014-08-25 CN CN201410421027.8A patent/CN104253371A/en active Pending
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102263356A (en) * | 2011-06-03 | 2011-11-30 | 中国科学院上海光学精密机械研究所 | Single-frequency narrow linewidth polarization-maintaining all-fiber pulse laser |
| CN102263358A (en) * | 2011-06-15 | 2011-11-30 | 北京工业大学 | High-power broadband superfluorescence light source in all-fiber structure |
| CN102983483A (en) * | 2012-12-05 | 2013-03-20 | 清华大学 | All-optical fiber laser based on broadband light spectrum |
| CN103001110A (en) * | 2012-12-05 | 2013-03-27 | 清华大学 | Optical fiber laser based on broadband spectrum |
| CN203183034U (en) * | 2013-04-03 | 2013-09-11 | 首都医科大学 | Laser device and laser system |
Cited By (2)
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| CN105186270A (en) * | 2015-09-23 | 2015-12-23 | 深圳市欧凌镭射科技有限公司 | Picosecond pulse optical fiber laser device |
| CN105186270B (en) * | 2015-09-23 | 2018-08-31 | 深圳市欧凌镭射科技有限公司 | A kind of Picopulse optical fiber laser |
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| CN104752941B (en) | 2016-10-26 |
| CN104253371A (en) | 2014-12-31 |
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Address after: 518125 Building A2, Building A3, Building 2-3, Building A4, Building A5, Building 6, Building A2, Furong Third Road, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Co-patentee after: ANSHAN CHUANGXIN LASER TECHNOLOGY Co.,Ltd. Patentee after: MAXPHOTONICS Co.,Ltd. Address before: 518103 Shenzhen, Baoan District, Guangdong Province, South Town of Shing Town, South Korea and a community of Mingxin Industrial Park first, third story B Co-patentee before: ANSHAN CHUANGXIN LASER TECHNOLOGY Co.,Ltd. Patentee before: MAXPHOTONICS Co.,Ltd. |