CN104901150A - Multi-wavelength liquid drop laser - Google Patents
Multi-wavelength liquid drop laser Download PDFInfo
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- CN104901150A CN104901150A CN201510271055.0A CN201510271055A CN104901150A CN 104901150 A CN104901150 A CN 104901150A CN 201510271055 A CN201510271055 A CN 201510271055A CN 104901150 A CN104901150 A CN 104901150A
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Abstract
The invention provides a multi-wavelength liquid drop laser. A first capture light source is connected with a first capture fiber through a first optical isolator, a second capture light source is connected with a second capture fiber through a second optical isolator, and light traps formed by laser beams of the emitting ends of the first capture fiber and the second capture fiber stably capture M liquid drop resonant cavities in matching fluid. M micro nano fibers close to various liquid drop resonant cavities couple pump light into the liquid drop resonant cavities, and the laser dye doped in the liquid drop resonant cavities when stimulated output laser and form an echo wall mode. When the output laser in the liquid drop resonant cavities increases to a certain level, nearby micro nano fibers couple out M wavelength laser. The stable and adjustable multi-wavelength liquid drop laser is realized by combining fiber optical tweezers technology and microballoon resonant cavity theory, and is small in size, high in control force, stable in structure high in Q value and low in output threshold.
Description
Technical field
What the present invention relates to is a kind of laser, specifically a kind of multiple-wavelength laser.
Background technology
The operation material of liquid laser is divided into two classes: a class is liquid organic compounds, and another kind of is inorganic compound liquid.Wherein, dye laser is the Typical Representative of organic liquid laser.The wavelength cover of dye laser is that ultraviolet arrives near infrared band (300nm ~ 1.3 μm), also wave-length coverage can be extended to vacuum ultraviolet (VUV) to middle-infrared band by technology such as mixing.Optical maser wavelength continuously adjustable is the most important output characteristic of dye laser.The feature of dye laser is that structure is simple, cheap, and is mainly used in the field such as scientific research, medical science, as aspects such as laser spectroscopy, photochemistry, isotope separation, photobiology.
The shortcoming of liquid-dye laser is that the mobility of liquid and the characteristic that is difficult to fix make it design and complex structure, heaviness, and cost is high and easily leak, and pollutes environment and staff and injures.Use the material that the drop being mixed with laser dye produces as laser in the present invention, drop itself is as the resonant cavity in laser, and its structure is equal to microsphere resonator.The experimental study development in microsphere resonator chamber is along with the correlation theory of Microsphere Cavities and the development of various microballoon manufacture craft are progressively carried out, value (Spontaneous emission probabilities at radio frequencies [J] .Phys.Rev. that the increase that nineteen forty-six Purcell studies vacuum field pattern density when finding optical microcavity internal resonance will make the spontaneous radiation probability of atom in chamber far exceed free space, 1946,69:681).The Garrett of U.S.'s BTL in 1961 etc. prove that microspheroidal resonant cavity can be used as laserresonator first, and in crystal microballoon, observed pulse laser generation and microballoon Whispering-gallery-mode fluorescent emission oscillatory occurences (Stimulated emission into optical whispering modes of spheres [J] .Phys.Rev., 1961,124 (6): 1807 ~ 1809).
Traditional laser is under the activation of electric current or other laser, make luminescent substance release light, the light of releasing be specularly reflected again by this material to produce more light, thus cause laser to occur.And this light amplification process is placed in the microballoon replacement of the tapered distal end of two optical fiber in microsphere laser.Allow light inject microballoon from the end of an optical fiber, propagate with WGM in microballoon.Light constantly enters microballoon, and the light intensity in ball constantly increases, until light intensity acquires a certain degree, light is overflowed in ball, and is arrived by second fiber-optic probe.By this approach, a very weak signal, after sending into microballoon by optical fiber, can be enhanced doubly a lot.Obviously, this method not only reduces the volume of equipment, significantly reduces its requirement to excitation energy simultaneously.Experiment shows, this laser is usually less than 0.1% of Raman laser to energy requirement.This method is also promoted rapidly, at present, the microsphere laser device of the pole Low threshold containing different alloy is realized by many people, what use is grinding or burns the obtained microspheres with solid of mode of melting, and Microsphere Cavities laser to the surface flatness of microsphere resonator and symmetry requirement high, therefore there is surface tension of liquid and the liquid microballoon formed has outstanding advantage.
1986, the people such as Qian Shixiong report laser (Lasing droplet:high-lighting the liquid-air interface by laser emission [J] .Science achieving Low threshold in spherical droplets, 1986,231:486 – 488), the method of mechanical oscillation is wherein used to control the droplets fall of dye solution, use exciting light to irradiate the fall trajectory region of bead, observed liquid microballoon Output of laser.The shortcoming of this method is that mechanical oscillation make drop have unsteadiness, is difficult to realize stable Laser output.The control of drop difficulty is a key factor of restricting liquid drop laser developments for a long time.Therefore be employed herein optical fiber optical tweezers technology, use the ligh trap of planar end surface optical fiber formation staggered relatively to catch multiple drop, greatly strengthen the stability of drop resonant cavity.
A kind of multi-wavelength drop laser of what we will design is incorporating light harvesting.The people such as She Jiang ripples in 2012 devise a kind of microballon immersion liquid laser and thermal management algorithm (CN102868082A) thereof, its method is that rear-earth-doped solid state laser gain medium excellent for laser activity is obtained microballon through optical manufacturing, is fixed on by microballon in fluorescence flow cell and is also immersed in completely in matching fluid.This technical scheme uses inorganic compound as operation material, and the present invention uses inorganic compound liquid to be entrained in matching fluid fine droplet.Huang Shaohua in 2009 devises the semiconductor laser that a kind of multiple-wavelength laser and preparation method thereof and application (CN101404384A) use distributed feedback Bragg grating to build.
Summary of the invention
The object of the present invention is to provide that a kind of size is little, manipulation force is strong, Stability Analysis of Structures, Q value are high and the multi-wavelength drop laser that output threshold value is low.
The object of the present invention is achieved like this:
Comprise first and catch light source 1, second catches light source 2, first optical isolator 3, second optical isolator 4, first catches optical fiber 5, second catches optical fiber 6, first catches light source 1 connects first by the first optical isolator 3 and catches optical fiber 5, second catches light source 2 connects second by the second optical isolator 4 and catches optical fiber 6, first catches that ligh trap that laser beam that optical fiber 5 and second catches optical fiber 6 exit end formed is stable in matching fluid 7 catches M drop resonant cavity 8, coupling pump light enters in each drop resonant cavity by the M root micro-nano fiber 9 near each drop resonant cavity, Output of laser form Whispering-gallery-mode is excited by the laser dye adulterated in each drop resonant cavity, when Output of laser is strengthened to a certain degree in drop resonant cavity by the laser of close micro-nano fiber coupling output M wavelength.
The present invention can also comprise:
First catches light source and second, and to catch light source be the LASER Light Source that two wavelength equal-wattages are identical.
First optical isolator and the second optical isolator are that two wavelength and first are caught light source and second and caught the optical isolator that light source matches.
First catches optical fiber and second catches the planar end surface monomode fiber that optical fiber is two horizontal positioned, end face is relative.
Drop resonant cavity is that diameter is from several to the drop being insoluble to matching fluid of tens microns.
The M kind dyestuff be mixed with respectively in M drop resonant cavity, described dyestuff is dissolved in drop and is insoluble to matching fluid, and this M kind different dyes be excited after output light different, drawn by the M root micro-nano fiber near drop resonant cavity.
Described matching fluid is that discord drop resonant cavity mixes and the liquid that refractive index ratio drop refractive index is low.
Described micro-nano fiber diameter is less than five microns.
The present invention achieves stable, adjustable multi-wavelength drop laser in conjunction with optical fiber optical tweezers technology and microsphere resonator theory, compared with existing drop laser, has that size is little, manipulation force is strong, Stability Analysis of Structures, high q-factor and export the advantages such as threshold value is low.
For the drop laser of Single wavelength, introduce principle of the present invention.Use staggered relatively being connected to catch the planar end surface optical fiber of light source, the ligh trap that the laser beam of relative outgoing is formed stablizes the drop of catching dopant dye in matching fluid.When the pump light meeting dye excitation wavelength is coupled in drop resonant cavity by the input optical fibre of close drop, light constantly enters drop resonant cavity and propagates (Fig. 3) with Whispering-gallery-mode.Dye molecule absorptive pumping light generation energy level transition in drop produces laser.The laser produced constantly is propagated with Whispering-gallery-mode in drop, and the light intensity in ball constantly increases, until light intensity acquires a certain degree, laser can from the output optical fibre coupling output near drop resonant cavity.Of the present invention is a kind of drop laser of multi-wavelength, we are on the basis of Single wavelength drop laser, flat section optical fiber optical tweezers is used to catch multiple drop resonant cavity being mixed with different dyes, and respectively it excited and export, just can obtain and a kind ofly facilitate controlled multi-wavelength drop laser.
Accompanying drawing explanation
Fig. 1 is multi-wavelength drop overall laser structure schematic diagram, and with drop resonant cavity and the view of micro-nano fiber under different coordinates, is x-y plane view and y-z plan view respectively.
Fig. 2 is dual wavelength drop overall laser structure schematic diagram.
Fig. 3 is the Echo Wall communication mode schematic diagram of light.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail.
The composition of composition graphs 2 dual laser comprises first and catches light source 1, second and catch light source 2, first optical isolator 3, second optical isolator 4, first and catch optical fiber 5, second and catch optical fiber 6, matching fluid 7, two drop resonant cavitys 8, two micro-nano fibers 9.First catches light source 1 and second catches light source 2 and to be connected first with the second optical isolator 4 by the first optical isolator 3 and to catch optical fiber 5 and second and catch optical fiber 6, first catches that ligh trap that laser beam that optical fiber 5 and second catches optical fiber 6 outgoing formed is stable in matching fluid 7 catches two drop resonant cavitys 8, two micro-nano fibers 9 near drop resonant cavity are connected the first excitation source 11 and the second excitation source 12 respectively by the 3rd optical isolator 13 with the 4th optical isolator 14, coupling pump light enters in drop resonant cavity by two micro-nano fibers 9, Output of laser form Whispering-gallery-mode is excited by the laser dye adulterated in drop resonant cavity, will be coupled away by close micro-nano fiber when Output of laser is strengthened to a certain degree in drop resonant cavity, received by the first spectrometer 15 and the second spectrometer 16, thus realize the output of two optical maser wavelengths.
First catches light source and second, and to catch light source be the LASER Light Source that two wavelength equal-wattages are identical.
First optical isolator and the second optical isolator are that two wavelength and first are caught light source and second and caught the optical isolator that light source matches.
Catch the planar end surface monomode fiber that optical fiber is two horizontal positioned, end face is relative.
The drop resonant cavity used for diameter be several drops being insoluble to matching fluid to tens microns.
The two kinds of dyestuffs be mixed with respectively in two drop resonant cavitys are dissolved in drop and are insoluble to matching fluid, and these two kinds of different dyes be excited after output light respectively different, drawn by two micro-nano fibers near drop resonant cavity.
Described matching fluid can be that discord drop resonant cavity mixes and the liquid that refractive index ratio drop refractive index is low.
Described micro-nano fiber diameter is less than five microns.
It is below the preparation process of dual wavelength drop laser.
1. the 980nm light source that selection two power are identical is as catching light source, light source tail optical fiber out connects the optical isolator of 980nm, the optical fiber end of optical isolator 980nm is out carried out the preliminary treatment of optical fiber, the coat of Miller pincers peeling optical fibre end is used to be about 3cm, with alcohol, fiber cladding is cleaned up, as catching optical fiber.
2. by long be 3cm wide be 4 μm of degree of depth to be 2 μm of spacing the be parallel groove of 5 μm on the surface laser incising of the wide poly (methyl methacrylate) plate 10 for 3cm of 5cm, two long, as shown in drawings.
3. utilize miniature behaviour to do the staggered relatively on poly (methyl methacrylate) plate of controller level handle well in step 1 two planar end surface optical fiber, and mutually vertical with the groove carved in step 2.
4. separately get the preliminary treatment that two monomode fibers carry out optical fiber, the coat in Miller pincers peeling optical fibre stage casing is used to be about 3cm, with alcohol fiber cladding cleaned up and carry out drawing cone process, be that the optical taper district of 2 μm is positioned in the groove carved in step 2 respectively by its diameter, and the input of these two micro-nano fibers is connected the pump light source that wavelength is 633nm and 532nm respectively.
5. the groove on poly (methyl methacrylate) plate drips, utilize miniature behaviour to make controller to move and catch optical fiber, make it in water, be in the position of relative level, open and catch light source, in water, instillation two is mixed with the liquid crystal droplet that the diameter of Rh6G and Pyrromethene597 is 5 μm respectively, adjust the pump light source that miniature behaviour does drop on the left side that controller makes to be mixed with Rh6G, the drop that is mixed with Pyrromethene597 inputs with the micro-nano fiber placed in groove on the right to match, and suspending drops is on micro-nano fiber.
6. open pump light source, and connect spectrometer respectively at the other end of two optical fiber, open spectrometer and just can observe wavelength and the luminous power that two export light.
Claims (8)
1. a multi-wavelength drop laser, comprise first and catch light source (1), second catches light source (2), first optical isolator (3, ) the second optical isolator (4), first catches optical fiber (5), second catches optical fiber (6), it is characterized in that: first catches light source (1) catches optical fiber (5) by the first optical isolator (3) connection first, second catches light source (2) catches optical fiber (6) by the second optical isolator (4) connection second, first catches that ligh trap that laser beam that optical fiber (5) and second catches optical fiber (6) exit end formed is stable in matching fluid (7) catches M drop resonant cavity (8), coupling pump light enters in each drop resonant cavity by the M root micro-nano fiber (9) near each drop resonant cavity, Output of laser form Whispering-gallery-mode is excited by the laser dye adulterated in each drop resonant cavity, when Output of laser is strengthened to a certain degree in drop resonant cavity by the laser of close micro-nano fiber coupling output M wavelength.
2. multi-wavelength drop laser according to claim 1, is characterized in that: first catches light source and second, and to catch light source be the LASER Light Source that two wavelength equal-wattages are identical.
3. multi-wavelength drop laser according to claim 1, is characterized in that: the first optical isolator and the second optical isolator are that two wavelength and first are caught light source and second and caught the optical isolator that light source matches.
4. multi-wavelength drop laser according to claim 1, is characterized in that: first catches optical fiber and second catches the planar end surface monomode fiber that optical fiber is two horizontal positioned, end face is relative.
5. multi-wavelength drop laser according to claim 1, is characterized in that: drop resonant cavity is that diameter is from several to the drop being insoluble to matching fluid of tens microns.
6. multi-wavelength drop laser according to claim 1, it is characterized in that: the M kind dyestuff be mixed with respectively in M drop resonant cavity, described dyestuff is dissolved in drop and is insoluble to matching fluid, and this M kind different dyes be excited after output light different, drawn by the M root micro-nano fiber near drop resonant cavity.
7. multi-wavelength drop laser according to claim 1, is characterized in that: described matching fluid is that discord drop resonant cavity mixes and the liquid that refractive index ratio drop refractive index is low.
8. multi-wavelength drop laser according to claim 1, is characterized in that: described micro-nano fiber diameter is less than five microns.
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| CN201510271055.0A CN104901150B (en) | 2015-05-25 | 2015-05-25 | A kind of multi-wavelength drop laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941716A (en) * | 2017-12-29 | 2018-04-20 | 首都师范大学 | Multi-core optical fiber resonator gas sensor |
| CN109802287A (en) * | 2019-03-20 | 2019-05-24 | 中国人民解放军国防科技大学 | Three-dimensional self-cooling laser optical tweezers device and method based on lens combination |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236275A (en) * | 2008-02-19 | 2008-08-06 | 哈尔滨工程大学 | Optical forceps based on ring -shaped multi- core optical fibre |
| CN102868082A (en) * | 2012-09-26 | 2013-01-09 | 中国科学院西安光学精密机械研究所 | Microbead immersed liquid laser and thermal management method thereof |
| US20130223467A1 (en) * | 2010-11-10 | 2013-08-29 | Institut Jozef Stefan | Spherical liquid-crystal laser |
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2015
- 2015-05-25 CN CN201510271055.0A patent/CN104901150B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236275A (en) * | 2008-02-19 | 2008-08-06 | 哈尔滨工程大学 | Optical forceps based on ring -shaped multi- core optical fibre |
| US20130223467A1 (en) * | 2010-11-10 | 2013-08-29 | Institut Jozef Stefan | Spherical liquid-crystal laser |
| CN102868082A (en) * | 2012-09-26 | 2013-01-09 | 中国科学院西安光学精密机械研究所 | Microbead immersed liquid laser and thermal management method thereof |
Non-Patent Citations (3)
| Title |
|---|
| ALEXANDR JONAS ET AL.: "Probing of ultrahigh optical Q-factors of individual liquid microdroplets on superhydrophobic surfaces using tapered optical fiber waveguides", 《J.OPT.SOC.AM.B》 * |
| MEHDI AAS ET AL.: "Spectral tuning of lasing emission from optofluidic droplet microlasers using optical stretching", 《OPTICS EXPRESS》 * |
| MELIKHAN TANYERI ET AL.: "Lasing droplets in a microfabricated channel", 《OPTICS LETTES》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941716A (en) * | 2017-12-29 | 2018-04-20 | 首都师范大学 | Multi-core optical fiber resonator gas sensor |
| CN107941716B (en) * | 2017-12-29 | 2024-01-02 | 首都师范大学 | Multi-core optical fiber resonant cavity gas sensor |
| CN109802287A (en) * | 2019-03-20 | 2019-05-24 | 中国人民解放军国防科技大学 | Three-dimensional self-cooling laser optical tweezers device and method based on lens combination |
| CN109802287B (en) * | 2019-03-20 | 2020-02-07 | 中国人民解放军国防科技大学 | Three-dimensional self-cooling laser optical tweezers device and method based on lens combination |
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| CN104901150B (en) | 2018-04-24 |
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