CN104901151A - Axial pumped traveling-wave amplified liquid-core fiber laser - Google Patents
Axial pumped traveling-wave amplified liquid-core fiber laser Download PDFInfo
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- CN104901151A CN104901151A CN201510310136.7A CN201510310136A CN104901151A CN 104901151 A CN104901151 A CN 104901151A CN 201510310136 A CN201510310136 A CN 201510310136A CN 104901151 A CN104901151 A CN 104901151A
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Abstract
The invention, which belongs to the technical field of the laser, provides an axial pumped traveling-wave amplified liquid-core fiber laser. In order to overcome defects of high laser energy loss and low conversion efficiency of the existing dye laser as well as problems of unstable simulated radiation frequency and radiation wavelength drift existence, the invention designs the provided fiber laser that enables axial pumped laser to be coupled with strokes and anti-strokes light by using a liquid fiber and uses a fluorescent dye molecule as a fluorescent seed to be mixed with a core operation material of the liquid core fiber so as to enhance simulated raman radiation. According to the invention, after pumped laser is emitted by a pumped laser source, base-mode laser is obtained by an external light-path aperture diaphragm; the base-mode laser is coupled to the liquid core fiber by using a coupling lens, thereby obtaining a tunable simulated raman radiation output; and then light splitting processing is carried out by using a transmission grating and/or a high-refraction-index prism, thereby completing a laser output process.
Description
Technical field
The invention belongs to laser technology field.
Background technology
Modern precision secondary industry and universities' research institutes teaching and scientific research all have demand widely to tunable LASER Light Source, and the multi-wavelength of axial pumping row ripple amplification liquid-core optical fibre laser, the removable feature of core operation material have just met the demand in market.But laser energy loss is high, conversion efficiency is low shortcoming that common dye laser exists.And the frequency of existing dye laser stimulated radiation is unstable, there is radiation wavelength drift.
Summary of the invention
The object of the invention is to solve the problem that laser energy loss is high, conversion efficiency is low, the frequency of stimulated radiation instability exists radiation wavelength drift of dye laser.
The invention provides a kind of axial pumping row ripple and amplify liquid-core optical fibre laser, by pumping laser light source 1, outer light path aperture 2, coupled lens 6, liquid-core optical fibre 3, transmission grating 4 and/or large index prism 5 form, basic mode laser is obtained by outer light path aperture 2 after sending pumping laser by pumping laser light source 1, coupled lens 6 is utilized to export obtaining tunable stimulated Raman radiation in basic mode laser coupled to liquid-core optical fibre 3, finally by incisure density be 600 ~ 700 transmission grating 4 and/or the prism 5 of refractive index more than 1.70 carry out light-splitting processing after complete Laser output process.Fill the organic liquid that the refractive index of having dissolved fluorescent dye is greater than quartz in described liquid-core optical fibre 3, and wherein the concentration of fluorescent dye should 10
-5to 10
-7between M.
Described coupled lens 6 is preferably coated with the lens of 532nm anti-reflection film.Containing C in the molecule of fluorescent dye
10~ C
30conjugation linear polyene functional group, wherein preferably beta-carotene, lycopene or canthaxanthin, fills in liquid-core optical fibre and can reduce absorption loss to pumping laser greatly containing the fluorescent dye of conjugation linear polyene functional group, improve laser-conversion efficiency.
Beneficial effect of the present invention:
1, achieve pump light, Stokes and anti-Stokes light are intercoupled;
2, the laser energy loss of axial pumping row ripple amplification liquid-core optical fibre laser provided by the present invention is low, conversion efficiency is high;
, there is not radiation wavelength drift in 3, the frequency stabilization of stimulated radiation.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 device schematic diagram;
Fig. 2 is the embodiment of the present invention 2 device schematic diagram;
Fig. 3 is the embodiment of the present invention 3 device schematic diagram.
Embodiment
Embodiment 1
As shown in Figure 1, in the present embodiment, axial pumping row ripple amplifies liquid-core optical fibre laser, is made up of pumping laser light source 1, outer light path aperture 2, coupled lens 6, liquid-core optical fibre 3, transmission grating 4; Basic mode laser is obtained by outer light path aperture 2 after sending pumping laser by pumping laser light source 1, utilize coupled lens 6 that tunable stimulated Raman radiation in basic mode laser coupled to liquid-core optical fibre 3, will be obtained to export, after carrying out light-splitting processing finally by the incisure density transmission grating 4 that is 600 ~ 700, complete Laser output process.Wherein, the organic liquid that the refractive index of having dissolved fluorescent dye is greater than quartz is filled in described liquid-core optical fibre 3.Fluorescent dye is trans lycopene.
Embodiment 2
As shown in Figure 2, in the present embodiment, axial pumping row ripple amplifies liquid-core optical fibre laser, is made up of pumping laser light source 1, outer light path aperture 2, coupled lens 6, liquid-core optical fibre 3, large index prism 5; Basic mode laser is obtained by outer light path aperture 2 after sending pumping laser by pumping laser light source 1, utilizing coupled lens 6 to export obtaining tunable stimulated Raman radiation in basic mode laser coupled to liquid-core optical fibre 3, after carrying out light-splitting processing finally by the prism 5 of refractive index more than 1.70, completing Laser output process.Wherein, the organic liquid that the refractive index of having dissolved fluorescent dye is greater than quartz is filled in described liquid-core optical fibre 3.Fluorescent dye is trans lycopene and add the All-cislycopene that iodine obtains and combine.
Embodiment 3
Can by embodiment 1 with in embodiment 2 large index prism 5 and transmission grating 4 combinationally use reinforcement spectrophotometric result.Fig. 3 is the schematic diagram of a kind of compound mode wherein, basic mode laser is obtained by outer light path aperture 2 after sending pumping laser by pumping laser light source 1, utilizing coupled lens 6 to export obtaining tunable stimulated Raman radiation in basic mode laser coupled to liquid-core optical fibre 3, after the prism 5 more than 1.70 carries out light-splitting processing finally by transmission grating 4 and refractive index, completing Laser output process.
In the present invention, coupled lens can adopt the lens being coated with 532nm anti-reflection film to strengthen the transmitance of laser, and develop skill effect.
Present invention incorporates the advantage of the coaxial pumping of dye laser, the coupling efficiency of pumping laser and liquid-core optical fibre is reached maximum, utilize dye fluorescence or biomolecule fluorescence to reach the effect of the stimulated Raman radiation strengthening liquid; The operating characteristic that the interaction distance of light in fiber laser and operation material is long is combined with the cumulative function of optical fiber to light simultaneously, and utilize the stimulated Raman radiation of core material (being namely filled in the organic liquid in liquid-core optical fibre and fluorescent dye) to reach upper conversion to pump light and lower conversion.Because the wavelength of stimulated Raman scattering is relevant to vibration level between intramolecular atom, therefore the laser frequency of stimulated Raman radiation is very stable, overcomes the shortcoming existing for dye laser.
Conjugation linear polyene molecule has many photoluminescent properties, and has in a liquid multiple different " conjugate length " because of it, and has multiple fluorescent belt to superpose, and broadens fluorescent belt length.And because the interaction of excited molecule and polyene molecule can make the non-linear susceptibility of polyene molecule increase considerably, and then enrich fluorescent band.The polyene molecule of several different chain length has different broadband fluorescence, and in general, chain is longer, and fluorescence gets over red shift.Therefore, be no matter select a kind of polyene molecule, or several polyene molecule combination (trans lycopene with add the All-cislycopene that iodine obtains combine) can obtain broadband fluorescence.And rule of thumb judge, when the atomicity of the carbon of straight chain conjugation is 10 ~ 30, as: also all contain " conjugated polyene " functional group identical or close with lycopene in the molecule of beta carotene, canthaxanthin, therefore all can obtain identical technique effect.
Through experiment test, when employing fluorescent seeds concentration is 10
-5to 10
-7during M, pumping laser threshold power density is generally 0.008 ~ 0.011W/cm2, and when incident light energy is 1.4mJ, Output of laser energy is 0.4mJ, and conversion efficiency is up to 28%.In addition, the concentration of fluorescent dye should 10
-5to 10
-7between M, because when concentration is excessive, the absorption loss of fluorescent dye is large, and pump light has not all sponged substantially, does not change into laser.When the thing that concentration is too low, the quantum yield of fluorescent dye is too low, does not have the effect that fluorescent seeds strengthens.
Claims (4)
1. an axial pumping row ripple amplifies liquid-core optical fibre laser, comprise pumping laser light source (1), outer light path aperture (2) and coupled lens (6), it is characterized in that, it also comprises liquid-core optical fibre (3), transmission grating (4) and/or the prism of refractive index more than 1.70 (5); Basic mode laser is obtained by outer light path aperture (2) after sending pumping laser by pumping laser light source (1), utilize coupled lens (6) basic mode laser coupled to be exported to obtaining tunable stimulated Raman radiation in liquid-core optical fibre (3), finally by incisure density be 600 ~ 700 transmission grating (4) and/or the prism of refractive index more than 1.70 (5) carry out light-splitting processing after complete Laser output process; Fill the organic liquid that the refractive index of having dissolved fluorescent dye is greater than quartz in described liquid-core optical fibre (3), and wherein the concentration of fluorescent dye 10
-5to 10
-7between M.
2. axial pumping row ripple according to claim 1 amplifies liquid-core optical fibre laser, it is characterized in that, described coupled lens (6) is coated with 532nm anti-reflection film.
3. axial pumping row ripple according to claim 1 amplifies liquid-core optical fibre laser, it is characterized in that, containing C in the molecule of described fluorescent dye
10~ C
30conjugation linear polyene functional group.
4. the axial pumping row ripple according to claim 1 or 3 amplifies liquid-core optical fibre laser, and it is characterized in that, described fluorescent dye is beta carotene, lycopene or canthaxanthin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510310136.7A CN104901151A (en) | 2015-06-08 | 2015-06-08 | Axial pumped traveling-wave amplified liquid-core fiber laser |
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| CN201510310136.7A CN104901151A (en) | 2015-06-08 | 2015-06-08 | Axial pumped traveling-wave amplified liquid-core fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063476A (en) * | 2017-05-27 | 2017-08-18 | 中国电子科技集团公司第四十研究所 | A kind of device and method for measuring Terahertz wavelength |
| CN109946788A (en) * | 2019-03-28 | 2019-06-28 | 深圳大学 | Restructural liquid-core optical fibre and preparation method thereof, laser and preparation method thereof |
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| US5903690A (en) * | 1996-07-05 | 1999-05-11 | D-Star Technologies, Inc. | Method for changing the refraction index in germanium silicate glass |
| CN2638296Y (en) * | 2003-06-27 | 2004-09-01 | 中国科学院上海光学精密机械研究所 | Multiple wavelength solid harmonic Raman laser |
| CN204696441U (en) * | 2015-06-08 | 2015-10-07 | 吉林大学 | Axial pumping row ripple amplifies liquid-core optical fibre laser |
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2015
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Patent Citations (3)
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| US5903690A (en) * | 1996-07-05 | 1999-05-11 | D-Star Technologies, Inc. | Method for changing the refraction index in germanium silicate glass |
| CN2638296Y (en) * | 2003-06-27 | 2004-09-01 | 中国科学院上海光学精密机械研究所 | Multiple wavelength solid harmonic Raman laser |
| CN204696441U (en) * | 2015-06-08 | 2015-10-07 | 吉林大学 | Axial pumping row ripple amplifies liquid-core optical fibre laser |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063476A (en) * | 2017-05-27 | 2017-08-18 | 中国电子科技集团公司第四十研究所 | A kind of device and method for measuring Terahertz wavelength |
| CN107063476B (en) * | 2017-05-27 | 2019-05-17 | 中国电子科技集团公司第四十一研究所 | A kind of device and method measuring Terahertz wavelength |
| CN109946788A (en) * | 2019-03-28 | 2019-06-28 | 深圳大学 | Restructural liquid-core optical fibre and preparation method thereof, laser and preparation method thereof |
| CN109946788B (en) * | 2019-03-28 | 2024-03-26 | 深圳大学 | Reconfigurable liquid core optical fiber and preparation method thereof, laser and preparation method thereof |
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