CN104393476A - Tunable passive mode-locked laser - Google Patents
Tunable passive mode-locked laser Download PDFInfo
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- CN104393476A CN104393476A CN201410616835.XA CN201410616835A CN104393476A CN 104393476 A CN104393476 A CN 104393476A CN 201410616835 A CN201410616835 A CN 201410616835A CN 104393476 A CN104393476 A CN 104393476A
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- laser
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- saturable absorption
- absorption solution
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Abstract
The invention belongs to the mode-locked laser technical field and relates to a mode-locked laser of which the pulse width can be optionally tuned according to needs, in particularly, a tunable passive mode-locked laser. A saturable absorption material is dissolved in a liquid, so that a liquid saturable absorption solution can be obtained; a laser gain crystal is immersed in the saturable absorption solution, and the mixture is arranged in a transparent container; and the above mixture, the transparent container, a pump light source, a coupling system and a laser resonance cavity form the mode-locked laser; the characteristic parameter value of a saturable absorber can be adjusted through adjusting the concentration of the saturable absorption solution and the distance between two light transmitting end surfaces of the transparent container, so that the tuning of mode-locked pulse width can be realized; and the saturable absorption solution is also adopted as a refrigeration fluid surrounding the laser gain crystal, so that the laser is more compact in structure. According to the tunable passive mode-locked laser of the invention, the tuning of laser ultrashort pulse width can be realized under the situation that the structure of the laser resonance cavity is not changed, and therefore, the tunable passive mode-locked laser has a great development and practical value.
Description
Technical field
The present invention relates to mode-locked laser technology, is the tunable laser with active-passive lock mould of a kind of pulse duration.
Background technology:
The method obtaining mode-locked laser comprises initiatively and passive two kinds of methods, wherein passive method utilizes some material to realize the characteristic that light has non-linear saturable absorption, these materials with non-linear saturable absorption characteristic are called as saturable absorber (SA), and the characteristic parameter describing locked mode SA comprises unsaturation loss, modulation depth, saturation flux (saturated light intensity), recovery time etc.The repetition rate of mode-locked laser pulse is determined by the light path of resonant cavity, and pulse duration is then determined by the size of laser gain crystal and SA characteristic parameter value, and the size changing the characteristic parameter value of SA just can change the size of mode locking pulse width.For pulse duration at psec, femtosecond, and the mode-locked laser of Ah's second-time, when not changing laser resonator structure, realizing the tunable of pulse duration and there is development and practical value greatly.
Current saturable absorption material, such as: LiF:F
- 2, Cr
4+: YAG, V
3+: YAG, Co
2+: LaMgAl
11o
19gaAs, SESAM (semiconductor saturable absorbing mirror), CNT (carbon nano-tube) and graphene (Graphene) etc. are solid-state, once be prepared to solid-state saturable absorber, its characteristic parameter value is exactly immutable, when we are when testing or need in practical application to regulate the characteristic parameter of SA to change pulse duration, just again must prepare another block saturable absorber.
The saturable absorber of dye mode-locking laser is liquid dye, dye cell is placed on the place near speculum in laserresonator, namely laser gain material and dye cell are two devices be separated from each other, and not yet have the mode-locked laser be placed in by laser gain material in saturable absorber.
Summary of the invention:
The problem to be solved in the present invention is: obtain the saturable absorber that characteristic ginseng value can arbitrarily regulate, and then realize the tunable mode-locked laser of pulse duration; Saturable absorber is combined with laser gain crystal, makes laser structure compacter.
Technical scheme of the present invention is: by saturable absorption material dissolves in a liquid, makes liquid saturable absorption solution; Laser gain crystal is immersed in saturable absorption solution, and is all contained in transparent vessel; They and pump light source, coupled system and laserresonator form mode-locked laser; By regulating the distance between the concentration of saturable absorption solution and the logical light end face of transparent vessel two, regulate the characteristic ginseng value of saturable absorber, thus it is tuning to realize mode locking pulse width.
Transparent vessel in the present invention is made up of the material not absorbing oscillating laser.
The liquid dissolving saturable absorption material in the present invention does not also absorb oscillating laser.
Two logical light end faces of the transparent vessel in the present invention can be movable, and the distance namely between two end faces can regulate; Also can be fixing, namely change the distance between two end faces by replacing container.
Laserresonator in the present invention can design according to actual needs, and two logical light end faces of transparent vessel also can form laserresonator, as long as laser gain crystal is immersed in saturable absorption solution, and are all contained in transparent vessel.
Transparent vessel in the present invention can also be connected with circulating cooling system, to realize the control to saturable absorber and laser gain crystal temperature effect.
The present invention can also realize tunable Q-switched laser, as long as select suitable saturable absorption material, designs suitable laserresonator.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the embodiment of the present invention 1, comprises pump light source 1, coupled system 2, input mirror 3, transparent vessel 4, saturable absorption solution 5, laser gain crystal 6, refrative mirror 7, outgoing mirror 8.
Fig. 2 is the structural representation of the embodiment of the present invention 2, comprises pump light source 1, coupled system 2, transparent vessel 3, saturable absorption solution 4, laser gain crystal 5, outgoing mirror 6.
Embodiment:
Embodiment 1:
As Fig. 1 makes the 1550nm tunable mode-locked laser of a repetition rate 212MHz, pump light source 1 is 980nm semiconductor laser, and laser gain crystal 6 is Er:YVO
4, size 3*3*6mm, plated film is HT@980nm & 1550nm, saturable absorption solution 5 is graphene oxide water solution, transparent vessel 4 is rectangle glass container, face size 5*5mm, length 8mm, the logical light end face coating parameter of transparent vessel two is the plane of HT@1550nm, input mirror 3 is the level crossing of filming parameter HT@980nm & HR@1550nm, refrative mirror 7 is the plano-concave mirror of filming parameter HR@1550nm, radius of curvature 200mm, outgoing mirror 8 is the plano-concave mirror of film parameters T=3%@1550nm, radius of curvature 100mm, distance between input mirror 3 and refrative mirror 7 is 125mm, distance between refrative mirror 7 and outgoing mirror 8 is 580mm, the mode locking pulse of repetition rate 212MHz can be obtained from outgoing mirror, in glass container, increase the modulation depth that graphene oxide powder art just can increase saturable absorber, the mode locking pulse width of output is reduced.
Make the 1550nm tunable mode-locked laser of repetition rate 212MHz according to embodiment 1, laser gain crystal can also be the crystal of other radiation 1550nm wavelength; Saturable absorption solution can also be carbon nano-tube solution, graphene solution, and other has the solution of saturable absorption elastomeric material to 1550nm; Transparent vessel can also be connected with outer loop cooling system, controls the temperature of laser gain crystal and saturable absorber.
Embodiment 2:
As Fig. 2 makes the 1064nm tunable mode-locked laser of a repetition rate 6GHz, pump light source 1 is 808nm semiconductor laser, and laser gain crystal 5 is Nd:YAG, size 3*3*6mm, plated film is HT@808nm & 1064nm, and saturable absorption solution 4 is Cr
4+: YAG solution, transparent vessel 3 is the rectangle glass container of size 6*6*10mm, an its end face coating parameter is HT@808nm & HR@1064nm, and the distance between outgoing mirror 6 is 25mm, another logical light end face film parameters of container is HT@808nm & 1064nm, outgoing mirror 6 is the plano-concave mirror of curvature 100mm, and film parameters is T=5%@1064nm; Reduce the distance between the logical light face of glass container two, just can increase the width of mode locking pulse.
The 1064nm Q-switched laser of the 6GHz made according to embodiment 2, laser gain crystal can also be Nd:YVO
4, Nd:GdVO
4or the laser gain crystal of other radiation 1064nm wavelength; Saturable absorption solution can also be GaAs, carbon nano-tube, Graphene or other have the solution of saturated absorption elastomeric material at 1064nm; Glass container can be connected with circulating cooling system, carries out temperature control to laser gain crystal and saturable absorber; Laser gain crystal, saturable absorption solution and semiconductor laser can also be integrated and make side pumping module.
Claims (5)
1. a tunable laser with active-passive lock mould, is characterized in that saturable absorber to dissolve in a liquid, makes saturable absorption solution; Laser gain crystal is immersed in saturable absorption solution, and is all contained in transparent vessel; They and pump light source, coupled system, laserresonator form mode-locked laser; By regulating the distance between the concentration of saturable absorption solution and the logical light end face of transparent vessel two, regulate the characteristic ginseng value of saturable absorber, thus it is tuning to realize mode-locked laser pulse width.
2. the tunable laser with active-passive lock mould of one according to claim 1, laser gain crystal can be all be immersed in saturable absorption solution, also can be that part is immersed in the inside.
3. the tunable laser with active-passive lock mould of one according to claim 1,2, the shape of transparent vessel can be arbitrary, and end face can be plane, also can be concave surface, or convex surface.
4. the tunable laser with active-passive lock mould of one according to claim 1,2,3, transparent vessel can also be connected with circulating cooling system, carries out temperature control to laser gain crystal and saturable absorber.
5. the tunable laser with active-passive lock mould of one according to claim 1,2,3,4, laserresonator can be designed to arbitrary structures according to actual needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410616835.XA CN104393476A (en) | 2014-11-05 | 2014-11-05 | Tunable passive mode-locked laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410616835.XA CN104393476A (en) | 2014-11-05 | 2014-11-05 | Tunable passive mode-locked laser |
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|---|---|
| CN104393476A true CN104393476A (en) | 2015-03-04 |
Family
ID=52611332
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410616835.XA Pending CN104393476A (en) | 2014-11-05 | 2014-11-05 | Tunable passive mode-locked laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071205A (en) * | 2015-07-30 | 2015-11-18 | 复旦大学 | Supercontinuum light source based on mode-locked fiber laser with adjustable pulse width |
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN115498491A (en) * | 2022-10-28 | 2022-12-20 | 北京工业大学 | Multi-range pulse width adjustable ultrashort pulse laser |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105674A (en) * | 1985-07-23 | 1987-01-21 | 中国科学院上海光学精密机械研究所 | Mode lock laser dyestuff case |
| US20050018714A1 (en) * | 2003-07-25 | 2005-01-27 | Fermann Martin E. | Polarization maintaining dispersion controlled fiber laser source of ultrashort pulses |
| CN102244351A (en) * | 2011-05-27 | 2011-11-16 | 深圳大学 | Passive mode-locking device based on SCNTs (singlewalled carbon nano tubes) and manufacturing method thereof |
| CN103441416A (en) * | 2013-08-27 | 2013-12-11 | 北京工业大学 | Liquid saturable absorber mode locking optical fiber laser |
-
2014
- 2014-11-05 CN CN201410616835.XA patent/CN104393476A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105674A (en) * | 1985-07-23 | 1987-01-21 | 中国科学院上海光学精密机械研究所 | Mode lock laser dyestuff case |
| US20050018714A1 (en) * | 2003-07-25 | 2005-01-27 | Fermann Martin E. | Polarization maintaining dispersion controlled fiber laser source of ultrashort pulses |
| CN102244351A (en) * | 2011-05-27 | 2011-11-16 | 深圳大学 | Passive mode-locking device based on SCNTs (singlewalled carbon nano tubes) and manufacturing method thereof |
| CN103441416A (en) * | 2013-08-27 | 2013-12-11 | 北京工业大学 | Liquid saturable absorber mode locking optical fiber laser |
Non-Patent Citations (2)
| Title |
|---|
| QIAO WEN等: "Passively Q-Switched Nd:YAG Laser With Graphene Oxide in Heavy Water", 《IEEE PHOTONICS JOURNAL》 * |
| R Z NIE等: "Fully immersed liquid cooling thin-disk oscillator", 《LASER PHYS. LETT.》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071205A (en) * | 2015-07-30 | 2015-11-18 | 复旦大学 | Supercontinuum light source based on mode-locked fiber laser with adjustable pulse width |
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN115498491A (en) * | 2022-10-28 | 2022-12-20 | 北京工业大学 | Multi-range pulse width adjustable ultrashort pulse laser |
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Application publication date: 20150304 |