CN1409449A - Continous wave, femtosecond double color double tuning laser - Google Patents
Continous wave, femtosecond double color double tuning laser Download PDFInfo
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- CN1409449A CN1409449A CN 01131717 CN01131717A CN1409449A CN 1409449 A CN1409449 A CN 1409449A CN 01131717 CN01131717 CN 01131717 CN 01131717 A CN01131717 A CN 01131717A CN 1409449 A CN1409449 A CN 1409449A
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Abstract
This invention relates to a solid femtosecond laser of two-color coherent light generating continuous wave and femtosecond light pulse. A pump beam splitter and a focusing lens are set up outside a cavity with laser crystal, a continuous wave and femto-second light pulse two-color coherent beam splitting orientation device made up from a spectrum spread prism, two dispersion compensating prisms two tuning rasters and femtosecond pulse output mirror and continuous wave output mirror aer set up in the cavity. In operation, the pump light is spitted into 3:1 two light beam by a pump beam-splitter, then to be coupled into a laser crystal by a focusing lens to generate laser emission, the two beams of laser oscillate to and fro in the cavity and each oscillation has a gain got by the laser medium, and finally, the femtosecond light pulse and the continuous wave laser are output by the femtosecond pulse output mirror and the continuous wave output mirror respectively.
Description
Technical field
Content of the present invention belongs to ultrafast optical instrument technical field, relates to a kind of total solids femto-second laser, particularly a kind ofly can produce the femto-second solid laser device that involves the double-colored coherent light of femtosecond light pulse continuously simultaneously.
Background technology
The foundation of the research of solid laser material and femtosecond laser technology provides necessary and complete condition for the generation of ultrashort laser pulse, has also constantly proposed new requirement simultaneously.Initial requirement is to produce single wavelength ultrashort laser pulse personnel for deliberation of independent tuning to atom, molecule, transient optical state, magnetics, ultrafast phenomenas such as physics are studied, but along with science and technology life science particularly, program control femtochemistry, developing rapidly of field science and technology such as many excited state spectroscopies, the application in many aspects of the ultrashort pulse laser of monochromatic pulses sequence has been subjected to the restriction of certain degree, have only the information that adopts double-colored or polychrome femto-second laser pulse could obtain mass efficient, thereby dual wavelength and three-wavelength femote second laser are also developed appearance in succession.In recent years, in the biological big ultrafast spectroscopy of molecular-excited state of research, ambits such as femtosecond time resolution locking Molecular Spectroscopy, need a kind of continuous wave, femtosecond time resolution scanning imagery bi-coloured light spectrometer, in order to optionally to encourage two different molecular generation double resonances in the especially big molecule, measure its fluorescence Spectra, and then acquisition is studied the fluorescence lifetime of molecule, molecular structure information and relevant dynamic characteristic, also need badly for this reason and can be the foundation that this double resonance measurement provides the laser of crucial light source, but still find no up to now, the report of similar device in the present technique field.
Summary of the invention
The objective of the invention is to remedy the deficiency of state of the art, provide a kind of and can produce continuous wave, the femtosecond double color double tuning laser that involves the double-colored coherent light of femtosecond light pulse continuously simultaneously.
The technical solution that adopts is so for achieving the above object: the continuous wave that is provided, femtosecond double color double tuning laser have an opump beam-splitting mirror, condenser lens and one one by double-colored chamber concave mirror, chamber concave mirror, laser crystal titanium jewel (Ti: Al
2O
3) and two resonant cavitys that the chamber completely reflecting mirror is formed, the opump beam-splitting mirror is divided into 3: 1 two-beams with pump light and by condenser lens two-beam is transported in the resonant cavity, in resonant cavity, be provided with a spread spectrum prism, two disperse compensating prisms, two tuned light hurdles and a femtosecond pulse outgoing mirror and a continuous wave outgoing mirror, wherein: the spread spectrum mirror places by the chamber concave mirror to the continuous wave output light path of chamber completely reflecting mirror, and the continuous wave light beam of being propagated out by this spread spectrum prism is incident upon on the continuous wave outgoing mirror through a tuned light hurdle; A disperse compensating prism places by the chamber concave mirror to the femtosecond light pulse output light path of chamber completely reflecting mirror, and the femtosecond light pulse of being propagated out by this disperse compensating prism is incident upon on the femtosecond pulse outgoing mirror behind another disperse compensating prism and another piece tuned light hurdle successively.In this laser works, the pump light of 488～530nm is divided into 3: 1 two-beams, by condenser lens two-beam is coupled into laser crystal by the double-colored concave mirror of resonant cavity again, excitation Ti: Al by the opump beam-splitting mirror
2O
3In Ti
3+By ground state
2T
2gTransit to excitation state
2E
g, produce Laser emission, so the vibration back and forth in resonant cavity of two bundle laser is just arranged, every vibration once all obtains gain from laser medium, at last by the light pulse of femtosecond pulse outgoing mirror output femtosecond, by continuous wave outgoing mirror output continuous wave laser.
Description of drawings
Accompanying drawing is the optical texture schematic diagram of one of the present invention specific embodiment.
Embodiment
Referring to accompanying drawing, continuous wave of the present invention, femtosecond double color double tuning laser contain opump beam-splitting mirror 1, condenser lens 2, double-colored chamber concave mirror 3, chamber concave mirror 4, chamber completely reflecting mirror 5 and 8, laser crystal titanium jewel (Ti: Al
2O
3) 14, disperse compensating prism 9 and 10, spread spectrum prism 13, tuned light hurdle 11 and 12 and optical components such as femtosecond pulse outgoing mirror 6 and continuous wave outgoing mirror 7.Resonant cavity by double-colored chamber concave mirror 3, chamber concave mirror 4, laser crystal titanium jewel 14 and chamber completely reflecting mirror 5,6 component devices, in the chamber on two concave mirrors 3,4 angle of two light beams less than 15 °, the radius of curvature of two mirrors is 100mm, and all plate 700～900nm laser dura mater that is all-trans, concerning double-colored chamber concave mirror 3, transmitance about 90% is arranged in 488～530nm scope; Also all be coated with 700～900nm laser dura mater that is all-trans on two chamber completely reflecting mirrors 5 and 8; Titanium gem crystal 14 places 15～18 ℃ water cooling environment by temperature control.Be arranged on spread spectrum prism 13 in the resonant cavity, disperse compensating prism 9 and 10, tuned light hurdle 11 and 12 and femtosecond pulse outgoing mirror 6 and continuous wave outgoing mirror 7 constitute the beam-splitting orientation device that these lasers involve the double-colored coherent light of femtosecond light pulse continuously, three prisms 9,10,13 are wherein formed disperse and are compensated synchronous double-colored coherent optical pulse prism sequence, and they are ZF10 glass or Shi Yingbolibushi prism; Be equipped with the slit of wide about 0.3mm on two tuned light hurdles, can about move with the micron order precision, the slit location on the mobile light hurdle can reach the purpose of tuning wavelength; Femtosecond pulse outgoing mirror 6 and continuous wave outgoing mirror 7 are all for by K
9The level crossing that glass or quartz glass are made, being coated with 700～900nm wavelength light transmitance in the mirror surface is 2%～3% laser dura mater.Be used to receive pump light and be the mirror body that a two sides all is coated with laser reflective film the opump beam-splitting mirror 1 that pump light is divided into two-beam, it is 25%～35% reflectance coating that its front is coated with 488～530nm wavelength light transmitance, and the back is coated with the film that is all-trans to 488～530nm wavelength light.Be used for the condenser lens 2 that input light focuses on the laser crystal 14 is located at opump beam-splitting mirror 1 between the light path of resonant cavity, its focal length is 120mm, two sides plating visible light anti-reflection film.
When actual product of the present invention makes up, at first all optical mirror slips are contained on the micropositioning stage, again micropositioning stage and annex all are installed in one with varying with temperature that the invar rod supports less than 10 by the accompanying drawing configuration
-6On m/ ℃ the steel alloy platform, each minute surface center is all on same horizontal plane, the total chamber of resonant cavity length is between 1.8～2.0m, distance between the disperse compensating prism 9 and 10 is about 43～45cm, two tuned light hurdles are respectively near about outgoing mirror 5cm, laser crystal titanium gem stick is φ 6 * 3～φ 6 * 10mm/mm, and the two sides is the Brewster angle cutting.The present invention adopts Ar
+Laser or vanadic acid Nd laser are as pumping source, with the pumping of 9W power laser, suitably carry out gain allocation, can produce laser generation, kerr lens mode locking is realized in the femtosecond laser chamber, gives off the femtosecond light pulse of width less than 100fs, the about 100mW of power by outgoing mirror 6, is given off the laser beam of the about 100mW of continuous wave by outgoing mirror 7, the dominant wavelength of laser is near 790nm, and its tuning range is not less than 120nm.
Claims (4)
1, a kind of continuous wave, femtosecond double color double tuning laser, it is characterized in that having an opump beam-splitting mirror (1), a condenser lens (2) and one one are by double-colored chamber concave mirror (3), chamber concave mirror (4), laser crystal titanium jewel (14) and two chamber completely reflecting mirrors (5,8) resonant cavity of Zu Chenging, opump beam-splitting mirror (1) is divided into 3: 1 two-beams with pump light and by condenser lens (2) two-beam is transported in the resonant cavity, in resonant cavity, be provided with a spread spectrum prism (13), two disperse compensating prisms (9,10), two tuned light hurdles (11,12) and a femtosecond pulse outgoing mirror (6) and a continuous wave outgoing mirror (7), wherein: spread spectrum prism (13) places by chamber concave mirror (4) to the continuous wave output light path of chamber completely reflecting mirror (5), and the continuous wave light beam of being propagated out by this spread spectrum prism (13) is incident upon on the continuous wave outgoing mirror (7) through a tuned light hurdle (12); A disperse compensating prism (9) places by chamber concave mirror (4) to the femtosecond light pulse output light path of chamber completely reflecting mirror (5), and the femtosecond light pulse of being propagated out by this disperse compensating prism (9) is incident upon on the femtosecond pulse outgoing mirror (6) behind another disperse compensating prism (10) and another piece tuned light hurdle (11) successively.
2, continuous wave as claimed in claim 1, femtosecond double color double tuning laser is characterized in that femtosecond pulse outgoing mirror (6) and continuous wave outgoing mirror (7) are all for by K
9The level crossing that glass or quartz glass are processed into, being coated with 700～900nm wavelength light transmitance in the mirror surface is 2%～3% laser dura mater.
3, continuous wave as claimed in claim 1, femtosecond double color double tuning laser, it is characterized in that being coated with 488～530nm wavelength light transmitance in opump beam-splitting mirror (1) front is 25%～35% reflectance coating, is coated with the film that is all-trans to 488～530nm wavelength light in opump beam-splitting mirror (1) back.
4, continuous wave as claimed in claim 1, femtosecond double color double tuning laser is characterized in that spread spectrum prism (13) and two disperse compensating prisms (9,10) are ZF10 or Shi Yingbolibushi prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131717 CN1233074C (en) | 2001-09-18 | 2001-09-18 | Continous wave, femtosecond double color double tuning laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131717 CN1233074C (en) | 2001-09-18 | 2001-09-18 | Continous wave, femtosecond double color double tuning laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1409449A true CN1409449A (en) | 2003-04-09 |
| CN1233074C CN1233074C (en) | 2005-12-21 |
Family
ID=4670802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01131717 Expired - Fee Related CN1233074C (en) | 2001-09-18 | 2001-09-18 | Continous wave, femtosecond double color double tuning laser |
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| Country | Link |
|---|---|
| CN (1) | CN1233074C (en) |
Cited By (1)
| 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 |
-
2001
- 2001-09-18 CN CN 01131717 patent/CN1233074C/en not_active Expired - Fee Related
Cited By (1)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233074C (en) | 2005-12-21 |
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