CN1085016A - The self-start method of titanium-doped sapphire self mode-locked laser - Google Patents
The self-start method of titanium-doped sapphire self mode-locked laser Download PDFInfo
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- CN1085016A CN1085016A CN 93108787 CN93108787A CN1085016A CN 1085016 A CN1085016 A CN 1085016A CN 93108787 CN93108787 CN 93108787 CN 93108787 A CN93108787 A CN 93108787A CN 1085016 A CN1085016 A CN 1085016A
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Abstract
The self-start method of titanium-doped sapphire self mode-locked laser.The invention belongs to the ultra-short pulse laser light sources technical field.The titanium-doped sapphire self mode-locked laser has become current of paramount importance ultra-short pulse source.But it has the critical defect that can not start voluntarily.Utilize the method for introducing mechanical oscillation or interpolation mode locker to induce startup at present, these methods all have obvious shortcoming.The present invention is another kind of new self-start method, and its basic thought is to introduce the weak modulation of a synchronous or accurate synchronization gain, thereby introduces certain gain fluctuation, so as to reaching the purpose of inducing self mode locking.
Description
The invention belongs to the ultra-short pulse laser light sources technical field.
Because titanium-doped sapphire (Ti: Al
2O
3) extremely effective self mode locking (SML) characteristic, present this laser output has reached about llfs(lfs=10
-15Second) pulse duration and 10TW(1TW=10
12Watt) peak power of magnitude, the characteristic of its wide tunable has become the strongest instrument in the research of super piece phenomenon in addition.But it exists the serious technology barrier that can not start voluntarily again, thereby brings very big difficulty for application and commercialization.Currently used startup method has two kinds: the first applies suitable mechanical oscillation for one of laser or chamber mirror; It two is to insert the locked mode modulator in the chamber to make it to become the active-passive locking mode mode.The major defect of these two kinds of methods is: the mechanical disturbance method can not reliable and stablely start, and contingency and randomness are big; The active-passive locking mode method causes power output to descend owing to insert modulator in the chamber, the technical pattern complexity, and cost increases.
Task of the present invention provides a kind of method that starts voluntarily, and that this method has is reliable and stable, technical pattern is simple, the feature of no insertion element in the chamber.
Fig. 1 is a principle schematic of the present invention.
Among Fig. 1, components and parts (1)～(8) consist of common titanium-doped sapphire self mode-locked laser. These elements are that pump light spreads (1), pump light condenser lens (2), bundle compressive reflexes mirror (3) and (4), completely reflecting mirror (5), outgoing mirror (6), titanium jewel (7) and additional dispersion element (8). Ip represents that light intensity, t represent the time.
Basic thought of the present invention is: give SML-Ti: Al
2O
3Laser is introduced the weak modulation of a synchronous or accurate synchronization gain, thereby reaches the running of self-starting locked mode.Technical scheme is to insert a light intensity modulator (9) between pump light source (1) at laser and the pump light condenser lens (2), and during laser startup work, light intensity modulator (9) is with f
mThe weak modulated pumping light intensity of the sinusoidal frequency of=C/2L, (C is the light velocity, and L is the optical cavity length of self mode locking Ti sapphire laser), or, all can realize self-starting with the suitable chopper shield pump light of a kind of speed.After the laser startup work, light intensity modulator (9) or maintenance modulation condition perhaps stop modulation, perhaps withdraw from pump light light path.
Because the synchronization gain of laser is modulated at is equivalent to the active mode locking that does in the chamber into the loss modulator on the effect, so this method is effectively inevitable.The modulation of the weak big modulation depth of modulation ratio of gain is more easy, is because Ti: Al
2O
3The self mode locking characteristic that the has decision of laser itself, it only needs a suitable initial disturbance.Think TiAl at present
2O
3Laser can self mode locking the mechanism of running be Ti: Al
2O
3The Kerr(Ke Er of laser medium) lens (self focusing) effect, thus GVD (Group Velocity Dispersion) (GVD) mutual effect caused from phase modulated (SPM) and whole laser, finally the two reaches balance, and then laser turns round in the mode locking pulse mode.And self mode locking mechanism always a kind of positive feedback process in initiating process, can this positive feedback process be set up in an orderly manner, depends on the advantage that certain initial condition provides.The weak modulator approach of synchronization gain of the present invention obviously is to cause the most direct of initial strength pulsation and reasonable method to laser, thereby is a kind of effective ways.
Advantage of the present invention and good effect are given prominence to.Because light intensity modulator is outside the chamber, only externally the pump light of light path carries out weak modulation, has overcome the shortcoming that mechanical disturbance method and active-passive locking mode method are had in the prior art fully.
List of references
1.Opt.Lett.，Vol.16，No.5，324，（1991）.
2.Opt.Lett.，Vol.16，No.5，321，（1991）.
3.Appl.Phys.Lett.，58（919），2061（1991）.
4.Opt.Lett.，16，1964，（1991）.
5.Opt.Lett.，17，1289，（1992）.
Claims (1)
1, the self-start method of titanium-doped sapphire self mode-locked laser
The titanium-doped sapphire self mode-locked laser by
Pump light source (1),
Pump light condenser lens (2),
Bundle compressive reflexes mirror (3) and (4),
Completely reflecting mirror (5),
Outgoing mirror (6),
Titanium jewel (7),
Chamber internal dispersion element (8) is formed,
It is characterized in that,
During laser startup work, insert the self mode locking synchronous or quasi synchronous light intensity modulator of pulse repetition frequency (9) between pump light source (1) and condenser lens (2), pump light process modulator (9) back luminous intensity is with sinusoidal frequency f
m=C/2L is by weak modulation, and C is the light velocity, and L is the optical cavity length of ti sapphire laser,
After the laser startup work, light intensity modulator (9) or maintenance modulation condition perhaps stop modulation, perhaps withdraw from pump light light path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93108787 CN1085016A (en) | 1993-07-20 | 1993-07-20 | The self-start method of titanium-doped sapphire self mode-locked laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93108787 CN1085016A (en) | 1993-07-20 | 1993-07-20 | The self-start method of titanium-doped sapphire self mode-locked laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1085016A true CN1085016A (en) | 1994-04-06 |
Family
ID=4987309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93108787 Pending CN1085016A (en) | 1993-07-20 | 1993-07-20 | The self-start method of titanium-doped sapphire self mode-locked laser |
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| CN (1) | CN1085016A (en) |
Cited By (3)
| 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 |
| CN104348073A (en) * | 2013-08-09 | 2015-02-11 | 中国科学院物理研究所 | Tunable narrow-linewidth DUV (Deep Ultra Violet) laser |
| CN105576491A (en) * | 2016-03-14 | 2016-05-11 | 大恒新纪元科技股份有限公司 | Femtosecond laser oscillator |
-
1993
- 1993-07-20 CN CN 93108787 patent/CN1085016A/en active Pending
Cited By (5)
| 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 |
| CN104348073A (en) * | 2013-08-09 | 2015-02-11 | 中国科学院物理研究所 | Tunable narrow-linewidth DUV (Deep Ultra Violet) laser |
| CN105576491A (en) * | 2016-03-14 | 2016-05-11 | 大恒新纪元科技股份有限公司 | Femtosecond laser oscillator |
| WO2017156935A1 (en) * | 2016-03-14 | 2017-09-21 | 大恒新纪元科技股份有限公司 | Femtosecond laser oscillator |
| US10601197B2 (en) | 2016-03-14 | 2020-03-24 | Daheng New Epoch Technology Inc. | Femtosecond laser oscillator |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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