CN1127186C - Self-mode-locking laser - Google Patents

Self-mode-locking laser Download PDF

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Publication number
CN1127186C
CN1127186C CN 98108161 CN98108161A CN1127186C CN 1127186 C CN1127186 C CN 1127186C CN 98108161 CN98108161 CN 98108161 CN 98108161 A CN98108161 A CN 98108161A CN 1127186 C CN1127186 C CN 1127186C
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China
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laser
spherical reflector
pulse
laser medium
plane mirror
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CN 98108161
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CN1233869A (en
Inventor
蒋捷
张雨东
庄欣欣
崔传鹏
吴柏昌
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Fujian Institute of Research on the Structure of Matter of CAS
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Fujian Institute of Research on the Structure of Matter of CAS
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Abstract

The present invention provides a self-mode-locking laser which relates to the technical field of optoelectronic technique, in particular to the technical field of a laser. The self-mode-locking operation is realized by adopting the pumping self-mode-locking laser of a pulse laser; a continuous laser which is relatively large is not needed, the energy of output single pulses is high, and the pulse width of output mode-locking pulses is equal to the level when the continuous laser is in pumping operation; meanwhile, the self-starting operation of the self-locking mode of the laser is realized.

Description

A kind of self mode-locked laser
The present invention relates to the photoelectron technology field, particularly relate to field of lasers.
Comprise ti sapphire laser at present in the world, the Cr:LiSAF laser, the Cr:YAG laser, mixing the self mode locking that chromium forsterite laser etc. realized all is (" 60-fsec pulse generation from a self-mode-locked Ti:sapphire laser ", the Opt.Lett. that adopt the continuous wave laser pumping to realize, 1991,16:42, D.E.Spence, P.N.Kean, therefore W.Sibbett), be self mode locking under the continuous state.The single pulse energy that such self mode-locked laser produces is minimum, if single pulse energy needs to amplify, amplifying stage needs to adopt the pulse laser pumping again, and this makes chirped pulse amplification system complicated (" 1.1-J, 120-fs laser system based on Nd:glass pumped Ti:sapphire ", Opt.Lett., 1996,8:603, J.Bonlie, D.F.Price, W.E.White).
Purpose of the present invention just is to realize self mode locking under the pulse laser pumping, can remove huge relatively continuous wave laser from, exports the single pulse energy height simultaneously.
Realize that technical scheme of the present invention is, the pump light line focus system 2 that pulse laser 1 produces focuses on the laser medium 7.Self mode-locked laser is by spherical reflector 3,4, the folding laser cavity of Z font four mirrors that plane mirror 5,6 is formed, and wherein plane mirror 6 is outgoing mirrors that the part transmission is arranged.Self mode locking need be by adjusting the distance of focusing system 2 and laser medium 7, and the distance of spherical reflector 3,4 and laser medium 7 and obtaining.
For the consideration of pulse self mode-locked laser space compactedness, also can be arranged into X font four mirror refrative cavities to above-mentioned self mode-locked laser.
In order to obtain the synchronous ultrashort pulse output of two-way, one tunnel output is as pump signal, and another road can be designed to the annular chamber self mode-locked laser to above-mentioned self mode-locked laser as detectable signal.
The nonlinear refractive index of some laser medium is too little, the self-focusing effect of self is not enough to realize self mode locking, perhaps can realize self mode locking, but self mode locking is difficult to self-starting, all can adopt the bigger auxiliary nonlinear dielectric of nonlinear refractive index to realize the self-starting of self mode locking, can place the bigger nonlinear dielectric 10 of nonlinear refractive index between the spherical reflector 8,9 of above-mentioned self mode-locked laser, form a little confocal cavity, whole self mode locking laser cavity becomes the six mirror refrative cavities of being made up of spherical reflector 3,4,8,9 and plane mirror 5,6.
Pulse laser 1 can adopt electric-optically Q-switched nanosecond Nd:YAG frequency double laser, perhaps acousto-optic Q modulation nanosecond the Nd:YAG frequency double laser, perhaps adopting output wavelength is the semiconductor laser of 670nm.
Laser medium 7 can adopt titanium-doped sapphire, or Cr:LiSAF, or Cr:LiSGAF.
The present invention substitutes huge relatively continuous wave laser with pulse laser and realizes self mode locking as pumping source, self mode-locked laser output single pulse energy height.
Now accompanying drawing is made brief description: Fig. 1 is the Z font self mode-locked laser schematic diagram of pulse laser pumping; Fig. 2 is the X font self mode-locked laser schematic diagram of pulse laser pumping; Fig. 3 is the annular chamber self mode-locked laser schematic diagram of pulse laser pumping; Fig. 4 is six mirror chamber self-starting self mode-locked laser schematic diagrames of pulse laser pumping;
Embodiment 1, as shown in Figure 1, pulse laser 1 adopts electric-optically Q-switched nanosecond Nd:YAG frequency double laser, laser medium 7 adopts titanium-doped sapphire, laser beam process focusing system 2 pumpings that the Nd:YAG frequency double laser sends are by 3,4,5, the Z font self mode-locked laser that 6 four mirrors are formed, wherein 3, the 4th, spherical reflector, in order in laser medium 7, to form laser beam waist, produce bigger optical power density, thereby obtain stronger self-focusing effect to form self mode locking, outgoing mirror 6 plating partial reflection films, pulse envelope from outgoing mirror 6 outputs one broad, careful distance and the spherical reflector 3 of adjusting focusing system 2 and laser medium 7,4 and laser medium 7 between distance, can find to export and arrange neat mode locking pulse sequence in the envelope.
Embodiment 2, as shown in Figure 2, consider that for the space reasonability self mode-locked laser is arranged into X font four mirror refrative cavities.It is the semiconductor laser of 670nm that pulse laser 1 adopts output wavelength, and laser medium 7 adopts Cr:LiSAF, still from the neat mode locking pulse sequence of outgoing mirror 6 outputs.
Embodiment 3, as shown in Figure 3, during pulse laser pumping annular chamber self mode-locked laser, outgoing mirror 6 can be exported clockwise self mode locking pulse train, anticlockwise self mode locking pulse train can be exported again, even the self mode locking pulse train of both direction can also be exported.When the mode locking pulse sequence of both direction was exported simultaneously, one road signal can be used as detection usefulness, and another road signal can be used as pumping usefulness, can be used for accurately measuring photoluminescence.Pulse laser 1 adopts acousto-optic Q modulation nanosecond Nd:YAG frequency double laser, and laser medium 7 adopts titanium-doped sapphire.
Embodiment 4, as shown in Figure 4, in the self mode-locked laser chamber, arrange a little confocal cavity again, form by spherical reflector 8,9 and the bigger nonlinear dielectric 10 of nonlinear refractive index, though nonlinear dielectric 10 is not as laser medium, but it makes the less laser medium of nonlinear refractive index 7 be easy to realize self mode locking, perhaps make the easy self-starting of self mode locking of the bigger laser medium of nonlinear refractive index, it is the semiconductor laser of 670nm that pulse laser 1 adopts output wavelength, and laser medium 7 is Cr:LiSGAF.

Claims (7)

1. self mode-locked laser, by pulse laser (1), focusing system (2), first spherical reflector (3), second spherical reflector (4), first plane mirror (5), second plane mirror (6) and laser medium (7) are formed, it is characterized in that, laser medium (7) is titanium-doped sapphire or Cr:LiSAF or Cr:LiSGAF, adopt pulse laser (1) pumping Z font four mirror refrative cavities to realize self mode locking, second plane mirror (6) is the outgoing mirror that the part transmission is arranged, by adjusting the distance and first spherical reflector (3) of focusing system (2) and laser medium (7), the distance of second spherical reflector (4) and laser medium (7) and obtain ultrashort pulse output, its optical path is: the light pulse that pulse laser (1) produces enters Z font refrative cavity inside by focusing system (2) through first spherical reflector (3), light beam takes place for the first time through laser medium (7) and laser medium, and the effect back reflexes to first plane mirror (5) by second spherical reflector (4), light pulse is returned in second spherical reflector (4) converges at laser medium (7) by former road through first plane mirror (5) reflection, effect for the second time takes place after first spherical reflector (3) reflexes to second plane mirror (6) in light pulse and laser medium (7), outside the light pulse part output cavity, the residue light pulse is reflected in and does reflection circulation next time in the chamber.
2. self mode-locked laser, by pulse laser (1), focusing system (2), first spherical reflector (3), second spherical reflector (4), first plane mirror (5), second plane mirror (6) and laser medium (7) are formed, it is characterized in that, laser medium (7) is titanium-doped sapphire or Cr:LiSAF or Cr:LiSGAF, adopt pulse laser (1) pumping X font four mirror refrative cavities to realize self mode locking, second plane mirror (6) is the outgoing mirror that the part transmission is arranged, by adjusting the distance and first spherical reflector (3) of focusing system (2) and laser medium (7), the distance of second spherical reflector (4) and laser medium (7) and obtain ultrashort pulse output, its optical path is: the light pulse that pulse laser (1) produces enters X font four mirror refrative cavity inside by focusing system (2) through first spherical reflector (3), light beam takes place for the first time through laser medium (7) and laser medium, and the effect back reflexes to first plane mirror (5) by second spherical reflector (4), light pulse is returned in second spherical reflector (4) converges at laser medium (7) by former road through first plane mirror (5) reflection, effect for the second time takes place after first spherical reflector (3) reflexes to second plane mirror (6) in light pulse and laser medium (7), outside the light pulse part output cavity, the residue light pulse is reflected in and does reflection circulation next time in the chamber.
3. self mode-locked laser, by pulse laser (1), focusing system (2), first spherical reflector (3), second spherical reflector (4), first plane mirror (5), second plane mirror (6) and laser medium (7) are formed, it is characterized in that, laser medium (7) is titanium-doped sapphire or Cr:LiSAF or Cr:LiSGAF, adopt pulse laser (1) pumping source annular chamber to realize self mode locking, acquisition ultrashort pulse output, its optical path is: the light pulse that pulse laser (1) produces enters annular chamber inside by focusing system (2) through first spherical reflector (3), light beam takes place to act on the back for the first time through laser medium (7) and laser medium and reflexes to first plane mirror (5) by second spherical reflector (4), reflexes to second plane mirror (6) again, outside the part light pulse output cavity, the residue light pulse reflexes to first spherical reflector (3) and do reflection circulation next time in the chamber, through the self mode locking train of impulses of the exportable both direction of plane mirror (6).
4. self mode-locked laser, by pulse laser (1), focusing system (2), first spherical reflector (3), second spherical reflector (4), first plane mirror (5), second plane mirror (6), laser medium (7), the 3rd spherical reflector (8), the 4th spherical reflector (9) and nonlinear dielectric (10) are formed, it is characterized in that, laser medium (7) is titanium-doped sapphire or Cr:LiSAF or Cr:LiSGAF, adopt pulse laser (1) pumping six mirror refrative cavities to realize being easy to the self mode locking of self-starting, nonlinear dielectric (10) is placed between the 3rd spherical reflector (8) and the 4th spherical reflector (9), form a little confocal cavity, and the nonlinear refractive index of nonlinear dielectric (10) is greater than the nonlinear refractive index of laser medium (7), acquisition ultrashort pulse output, its optical path is: the light pulse that pulse laser (1) produces enters six mirror refrative cavity inside by focusing system (2) through first spherical reflector (3), light beam takes place for the first time through laser medium (7) and laser medium, and the effect back reflexes to the 3rd spherical reflector (8) by second spherical reflector (4), pass through nonlinear dielectric (10) again and reflex to first plane mirror (5) by the 4th spherical reflector (9), return through the 4th spherical reflector (9) by former road through first plane mirror (5) reflection and to reflect, through nonlinear dielectric (10), by the 3rd spherical reflector (8) and second spherical reflector (4) reflection, pass through the reflection of laser medium (7) and first spherical reflector (3) again outside second plane mirror (6) part light pulse output cavity, the residue light pulse is reflected in and does reflection circulation next time in the chamber.
5. as claim 1,2,3 or 4 described self mode-locked lasers, it is characterized in that said pulse laser (1) is electric-optically Q-switched nanosecond Nd:YAG frequency double laser.
6. as claim 1,2,3 or 4 described self mode-locked lasers, it is characterized in that said pulse laser (1) is an acousto-optic Q modulation nanosecond Nd:YAG frequency double laser.
7. as claim 1,2,3 or 4 described self mode-locked lasers, it is characterized in that said pulse laser (1) is that output wavelength is the semiconductor laser of 670nm.
CN 98108161 1998-04-29 1998-04-29 Self-mode-locking laser Expired - Fee Related CN1127186C (en)

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CN 98108161 CN1127186C (en) 1998-04-29 1998-04-29 Self-mode-locking laser

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CN 98108161 CN1127186C (en) 1998-04-29 1998-04-29 Self-mode-locking laser

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CN1127186C true CN1127186C (en) 2003-11-05

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Publication number Priority date Publication date Assignee Title
CN100375346C (en) * 2003-12-31 2008-03-12 中国科学院西安光学精密机械研究所 Core pluggable unit for multi-wavelength cross mode locking femtosecond laser
CN1317796C (en) * 2004-07-09 2007-05-23 中国科学院物理研究所 Frequency multipliver plate strip laser device in folding chamber for compensating astigmatism
CN103531999A (en) * 2013-10-22 2014-01-22 中国科学院物理研究所 Self-starting mode locking device and method as well as laser system including device
CN107658687B (en) * 2016-07-25 2020-01-31 中国科学院物理研究所 Self-starting femtosecond titanium gem laser oscillator of synchronous pump
CN107565354B (en) * 2017-07-13 2020-01-17 西安电子科技大学 High-power Kerr lens self-mode-locking laser of LD (laser diode) pump
EP4204421A2 (en) 2020-08-27 2023-07-05 Gilead Sciences, Inc. Compounds and methods for treatment of viral infections

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