CN1296766C - Fluorescent dye reinforced Raman laser frequency-shift appartus and use - Google Patents
Fluorescent dye reinforced Raman laser frequency-shift appartus and use Download PDFInfo
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- CN1296766C CN1296766C CNB2003101107652A CN200310110765A CN1296766C CN 1296766 C CN1296766 C CN 1296766C CN B2003101107652 A CNB2003101107652 A CN B2003101107652A CN 200310110765 A CN200310110765 A CN 200310110765A CN 1296766 C CN1296766 C CN 1296766C
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Abstract
The present invention relates to a fluorescent dye reinforced Raman laser frequency shifter and a purpose thereof. The present invention is characterized in that a focusing lens (2) is installed on the front end of a Raman medium tank (3) which is filled with Raman media, and a coupling lens (5) is installed on the back end of a fluorescent dye medium tank (4) which is filled with fluorescent dye media; transparent window sheets (6) and (7) are used for isolating the Raman medium tank (3), and transparent window sheets (7) and (8) are used for isolating the fluorescent dye medium tank (4). Laser light emitted from an exciting laser device (1) makes the Raman media generate frequency shifting laser light, and the fluorescent dye media output frequency modulating laser light after realizing the selection and the reinforcement of Raman laser light. The frequency modulation of laser light in the present invention has the advantages of high efficiency, narrow linewidth, high directivity and high stability. The frequency modulating laser light source can be used for laser medicine, laser alignment, laser atmosphere radars, multi-wavelength laser performance and scientific researches; therefore, the present invention has obvious economical and social benefits.
Description
One, technical field
The present invention relates to a kind of fluorescent dye and strengthen raman laser frequency shifter and purposes, belong to the laser frequency-modulation technical field.
Two, background technology
Laser frequency conversion (laser of frequency modulation) technology is a laser technology research focus always.Use stimulated Raman scattering (SRS) can produce new frequency coherence radiation, Y.R.Shen, " The Principles of Nonlinear Optics ", New York, Wiley, 1984.But traditional SRS efficient is low, is difficult to practicability.Dye laser is another important laser of frequency modulation technology, F.P.Schafer, " Principles of dye laser operation ", in Dye lasers, F.P.Schafer, ed, Springer-Verlag, Berlin, 1977.But general dye laser bands of a spectrum are wide, and the laser direction characteristic is bad, and conversion efficiency is low.Kwol etc. utilize dye fluorescence to strengthen SRS in little drop, Kwol A S, Chang R K.Fluorescence seeding of weaker-gain Raman modes in microdroplets:enhancement of stimulated Raman scattering, " Opt.Lett. ", 1992,17 (18): 1262.But the institute's raman laser that obtains gain and direction are restive.Use Raman medium such as Zhong Xianqiong and fluorescent media mix and have obtained the stimulated Raman scattering amplification, Zhong Xianqiong, Yang Jingguo, Kazakhstan unit is clear etc., and rhodamine B fluorescence strengthens carbon disulphide high-order stimulated Raman scattering, " light laser and the particle beams ", 2000,12 (2): 172-174.But this method need satisfy fluorescent media and the Raman medium dissolves each other, and short Raman medium pond can make the excitation laser threshold value increase, and long Raman medium pond can cause the strong absorption of fluorescent dye to exciting light.
Three, summary of the invention
The objective of the invention is provides a kind of fluorescent dye to strengthen raman laser frequency shifter and purposes at the deficiencies in the prior art, use suitable fluorescent dye medium to select to absorb residual excitation laser and strengthen required frequency raman laser, obtain the laser of frequency modulation light source of high-level efficiency, high direction, narrow linewidth and high stability.
Purpose of the present invention is realized by following technical measures
It is to install condenser lens at the front end of Raman medium that fluorescent dye strengthens the raman laser frequency shifter, contain the Raman medium in the Raman medium pond, at the rear end in fluorescent dye pond installing coupled lens, contain the fluorescent dye medium in the fluorescent dye pond, isolate Raman medium pond and fluorescent dye medium pond with transparent window film, the laser that optical excited laser sends makes the Raman medium produce frequency shift laser, and the selection of fluorescent dye media implementation raman laser strengthens the back and the output laser of frequency modulation.
Optical excited laser is pulsed solid stale laser frequency multiplication YAG laser instrument or ruby laser, any in gas laser excimer laser or the semiconductor laser.
The Raman medium is organic liquid acetone, ethanol or carbon disulphide; Any of high pressure hydrogen gas, nitrogen, oxygen or transparent solid silica fibre, crystal, clear glass.
The fluorescent dye medium is as selecting rhodamine 6G, rhodamine B or DCM ((any among 4-(Dicyanomethylene)-2-methyl-6-(p-dimethyl-aminostyryl)-4H+pyran) for use at visible region.
Raman medium pond and fluorescent dye medium pond useable glass, metal or plastic production, its section configuration is circular, square or polygon.
Each transparent window film all plates the anti-reflection deielectric-coating of high strength.
The present invention has following advantage:
1. it is low to have overcome existing Raman laser of frequency modulation conversion efficiency;
2. overcome the dye laser bandwidth, directivity is bad;
3. overcome and used fluorescence drop or Raman fluorescent media to mix to strengthen the shortcoming of raman laser;
4. high-level efficiency, narrow linewidth, high directivity and high stability laser frequency-modulation have been realized;
The laser of frequency modulation light source that uses this frequency shifter to produce can be used as laser medicine, laser guide, laser atmosphere radar, multiwavelength laser artistic performance and scientific research LASER Light Source.As the laser artistic performance, will be that the fine of existing green laser replenished.
Four, description of drawings
Fig. 1 strengthens raman laser frequency shifter structural representation for fluorescent dye
1 optical excited laser, 2 condenser lenses, 3 Raman medium ponds, 4 fluorescent dye medium ponds, 5 coupled lens, 6,7,8 are the isolation transparent window film.
Five, embodiment
Below by embodiment the present invention is specifically described; be necessary to be pointed out that at this present embodiment only is used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment
As shown in Figure 1, it is to install condenser lens 2 at the front end in Raman medium pond 3 that fluorescent dye strengthens the raman laser frequency shifter, contain the Raman medium in the Raman medium pond, at the rear end in fluorescent dye pond 4 installing coupled lens 5, contain the fluorescent dye medium in the fluorescent dye pond, two adjacent transparent windows (6 in three transparent window films, 7) isolate Raman medium pond 3, two other adjacent transparent window (7,8) isolate fluorescent dye medium pond 4, the laser that sends from optical excited laser 1 makes the Raman medium produce frequency shift laser, and the selection of fluorescent dye media implementation raman laser strengthens the back and the output laser of frequency modulation.
1. will analyze pure acetone contains in the Raman medium pond 3 as the Raman medium, DCM contains in the fluorescent dye medium pond 4 as the fluorescent dye medium, when frequency multiplication YAG laser instrument excitation energy is 140mj, pulse width is 6ns, pulse recurrence rate is that 10Hz is when passing through frequency shifter, obtained unifrequency, the 630nm raman laser output of monopulse 38.5mj energy, single pulse width is 3ns, live width is 0.9nm, output energy stability is 3%, the output raman laser angle of divergence is 0.17marc, has realized the high-level efficiency conversion from 532nm (green glow) to 630nm (ruddiness), and the LASER Light Source that this frequency device produces can be used as laser medicine, laser guide, aspects such as multiwavelength laser artistic performance obtain to use, as the laser artistic performance, will be that the fine of existing green laser replenished, its performance is much better than the raman laser of not being with fluorescent dye to strengthen.
2. will analyze straight alcohol contains in the Raman medium pond 3 as the Raman medium, DCM contains in the fluorescent dye medium pond 4 as the fluorescent dye medium, as frequency multiplication YAG laser instrument excitation energy 27mj, pulse width is 6ns, pulse recurrence rate is 10Hz when passing through frequency shifter, obtained the 630nm raman laser output of unifrequency, monopulse 3.0mj energy.
3. will analyze pure carbon disulphide contains in the Raman medium pond 3 as the Raman medium, R6G contains in the fluorescent dye medium pond 4 as the fluorescent dye medium, when using frequency multiplication YAG laser instrument to excite, obtained to strengthen the raman laser output that the wavelength of then exporting is 551nm and 571nm.
Claims (6)
1. fluorescent dye strengthens the raman laser frequency shifter, it is characterized in that the front end installing condenser lens (2) of this frequency shifter in Raman medium pond (3), contain the Raman medium in the Raman medium pond, at the rear end of fluorescent dye pond (4) installing coupled lens (5), contain the fluorescent dye medium in the fluorescent dye pond, two adjacent transparent windows (6 in three transparent window films, 7) isolate Raman medium pond (3), two other adjacent transparent window (7,8) isolate fluorescent dye medium pond (4), the laser that sends from optical excited laser (1) makes the Raman medium produce frequency shift laser, and the selection of fluorescent dye media implementation raman laser strengthens the back and the output laser of frequency modulation.
2. strengthen the raman laser frequency shifter according to the described fluorescent dye of claim 1, it is characterized in that optical excited laser is pulsed solid stale laser frequency multiplication YAG laser instrument or ruby laser, any in gas laser excimer laser or the semiconductor laser.
3. strengthen the raman laser frequency shifter according to the described fluorescent dye of claim 1, it is characterized in that the Raman medium is organic liquid acetone, ethanol or carbon disulphide; In high pressure hydrogen gas, nitrogen, oxygen or transparent solid silica fibre, crystal, the clear glass any.
4. strengthen the raman laser frequency shifter according to the described fluorescent dye of claim 1, it is characterized in that the fluorescent dye medium is any among rhodamine 6G, rhodamine B or the DCM.
5. strengthen the raman laser frequency shifter according to the described fluorescent dye of claim 1, it is characterized in that Raman medium pond and fluorescent media pond useable glass, metal or plastic production, its section configuration is circular, square or polygon.
6. strengthen the raman laser frequency shifter according to the described fluorescent dye of claim 1, it is characterized in that each transparent window film (6,7,8) all plates the anti-reflection deielectric-coating of high strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101107652A CN1296766C (en) | 2003-10-22 | 2003-10-22 | Fluorescent dye reinforced Raman laser frequency-shift appartus and use |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101107652A CN1296766C (en) | 2003-10-22 | 2003-10-22 | Fluorescent dye reinforced Raman laser frequency-shift appartus and use |
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| Publication Number | Publication Date |
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| CN1538231A CN1538231A (en) | 2004-10-20 |
| CN1296766C true CN1296766C (en) | 2007-01-24 |
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| CNB2003101107652A Expired - Fee Related CN1296766C (en) | 2003-10-22 | 2003-10-22 | Fluorescent dye reinforced Raman laser frequency-shift appartus and use |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795721B (en) * | 2015-04-28 | 2018-01-30 | 杭州电子科技大学 | A kind of enhanced tunable raman laser device |
| CN111934181B (en) * | 2020-07-22 | 2022-08-30 | 南京邮电大学 | Low-threshold organic Raman amplifier and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD110945A1 (en) * | 1974-05-03 | 1975-01-12 | ||
| CN2646908Y (en) * | 2003-10-22 | 2004-10-06 | 四川大学 | Fluorescent dye reinforced Raman laser frequency shifter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD110945A1 (en) * | 1974-05-03 | 1975-01-12 | ||
| CN2646908Y (en) * | 2003-10-22 | 2004-10-06 | 四川大学 | Fluorescent dye reinforced Raman laser frequency shifter |
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