CN112202043A - Coumarin C440 and C460 co-doped dye tunable laser - Google Patents
Coumarin C440 and C460 co-doped dye tunable laser Download PDFInfo
- Publication number
- CN112202043A CN112202043A CN202010897192.6A CN202010897192A CN112202043A CN 112202043 A CN112202043 A CN 112202043A CN 202010897192 A CN202010897192 A CN 202010897192A CN 112202043 A CN112202043 A CN 112202043A
- Authority
- CN
- China
- Prior art keywords
- dye
- coumarin
- laser
- pool
- doped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094026—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light for synchronously pumping, e.g. for mode locking
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/20—Liquids
- H01S3/213—Liquids including an organic dye
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a coumarin C440 and C460 co-doped dye tunable laser, which comprises a laser pump source, an oscillation-level dye pool and an amplification-level dye pool, wherein a first beam splitter is arranged on a transmission light path of the laser pump source, a first cylindrical mirror is arranged between the first beam splitter and the oscillation-level dye pool, a first total reflection mirror, a second beam splitter, a third total reflection mirror and a second cylindrical mirror are arranged between the first beam splitter and the amplification-level dye pool, a third cylindrical mirror is arranged between the second beam splitter and the oscillation-level dye pool, an oscillation output of the oscillation-level dye pool is provided with a grating and a plane mirror, an end mirror, a convex lens and a concave lens are arranged between the oscillation-level dye pool and the amplification-level dye pool, and coumarin C440 and coumarin C460 mixed laser dyes are respectively arranged in the oscillation-level dye pool and the amplification-level dye pool. According to the laser, the C440 and the C460 are co-doped, the fluorescence radiation of the C460 is enhanced by utilizing the energy transfer between the C440 and the C460, the laser efficiency of the C460 is improved, and the whole tuning output wavelength range is expanded.
Description
Technical Field
The invention belongs to the technical field of laser, and particularly relates to a coumarin C440 and C460 co-doped dye tunable laser.
Background
Tunable functionality has been one of the important issues in laser research since the advent of lasers. The core device of the tunable laser is a tunable laser medium with a broadband energy level structure. Among many lasers, dye lasers have become a key subject of research by researchers working on tunable lasers.
The dye laser has a tuning range as large as several microns, is a tunable laser with the most application, and has the characteristics of wide output spectral line range, high power, easy control of absorption and gain and the like, wherein the most important point is that the output laser wavelength of the dye laser can be continuously adjusted in a wide range. The dye laser is a laser which takes organic dye dissolved in solvents such as methanol, ethanol or water as an active medium, and has the advantages of capability of realizing narrow-band laser output by tuning in a wide spectral range, low pumping threshold, large gain, easiness in amplification and the like. A dye is an organic compound whose molecule is generally composed of several tens of atoms and whose energy level structure is complicated. Due to frequent collision and electrostatic interference of dye molecules and solvent molecules in the solution, spectral lines are widened, and finally a quasi-continuous broadband structure is formed in the spectrum determined by the whole vibration energy level. Thus, dye lasers can achieve short pulses with continuous, widely tunable wavelengths. Although the dye laser can cover the wavelength range from about 250nm to near infrared 1.3 μm, the dye laser is actually most efficient in the 550-700 nm band, and the short wavelength end limit is mainly limited by photochemical dissociation. The pumping light source of the dye laser mainly comprises ultraviolet light and visible region laser, and the blue-violet laser output is obtained by adopting a high-energy ultraviolet pumping light source.
However, the excessive photon energy of the pump light source can cause the photochemical dissociation of dye molecules, reduce the dye concentration and increase the amount of impurities (decomposed dye molecules), thereby causing laser effectReduced rate and shortened lifetime, even causing laser quenching. Therefore, the efficiency of the existing blue-violet and ultraviolet laser dyes is low. For example, the laser dye Coumarin440 (Coumarin440, C440 for short) in the blue-violet band has a tuning wavelength range of 420-470 nm and a concentration of 1.7 × 10 in the oscillation level-3mol/L, amplification level concentration of 3.4X 10-4mol/L, the wavelength of the pumping light is 355nm, the repetition frequency is 10Hz, the pulse width is 7ns, and the single pulse energy is 95mJ, the light-light conversion efficiency is about 5 percent.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a coumarin C440 and C460 co-doped dye tunable laser.
One embodiment of the present invention provides a coumarin C440 and C460 co-doped dye tunable laser, the coumarin C440 and C460 co-doped dye tunable laser comprising:
comprises a laser pumping source, an oscillating dye cell and an amplifying dye cell, wherein,
a first beam splitter is arranged on a transmission light path of the laser pumping source, a first cylindrical mirror is arranged on a light path between the first beam splitter and the oscillating dye pool, a first total reflection mirror, a second beam splitter, a third total reflection mirror and a second cylindrical mirror are arranged on a light path between the first beam splitter and the amplifying dye pool, a third cylindrical mirror is arranged on a light path between the second beam splitter and the oscillating dye pool, a grating and a plane mirror are arranged on an oscillation output light path of the oscillating dye pool, an end mirror, a convex lens and a concave lens are arranged on a light path between the oscillating dye pool and the amplifying dye pool, a coumarin C440 and coumarin C460 mixed laser dye is arranged in the oscillating dye pool, a coumarin C440 and coumarin C460 mixed laser dye is arranged in the amplifying dye pool, the concentration of the coumarin C440 in the oscillating dye pool is different from that of the coumarin C440 in the amplifying dye pool, the concentration of coumarin C460 in the oscillating dye pool is different from that of coumarin C460 in the amplifying dye pool.
In one embodiment of the invention, the laser pumping source is an Nd-YAG solid laser, the output laser wavelength is 355nm, the repetition frequency is 10Hz, the pulse width is 7ns, and the single pulse energy is 95 mJ.
In one embodiment of the present invention, the concentration of coumarin C440 in the oscillating dye pool is 2.4 × 10- 3mol/L, the concentration of coumarin C440 in the oscillating-level dye cell is 2.0 multiplied by 10-3mol/L。
In one embodiment of the invention, the concentration of coumarin C460 in the dye pool of the amplifier stage is 0.5 x 10- 4mol/L, the concentration of coumarin C460 in the amplification dye pool is 0.7 multiplied by 10-4mol/L。
In an embodiment of the present invention, the volume of the mixed laser dye of coumarin C440 and coumarin C460 in the oscillating-stage dye pool is a first preset volume, and the volume of the mixed laser dye of coumarin C440 and coumarin C460 in the amplifying-stage dye pool is a second preset volume, and the first preset volume is smaller than the second preset volume.
In one embodiment of the invention, the first preset volume is 250 ML.
In one embodiment of the invention, the second preset volume is 750 ML.
In one embodiment of the invention, the first totally reflecting mirror, the second totally reflecting mirror and the second totally reflecting mirror are all mirrors with reflectivity > 99% and the laser wavelength reflected by the mirrors is 355 nm.
In one embodiment of the invention, the beam splitting ratios of the first beam splitter and the second beam splitter are 1: 9.
In one embodiment of the invention, the output laser coordination wavelength of the coumarin C440 and C460 co-doped dye tunable laser is 421 nm-482 nm.
Compared with the prior art, the invention has the beneficial effects that:
according to the coumarin C440 and C460 co-doped dye tunable laser provided by the invention, through co-doping of the coumarin C440 and C460 laser dyes, the fluorescent radiation of the C460 dyes is greatly enhanced by utilizing the energy transfer between the coumarin C440 and C460 dyes, the laser efficiency of the C460 dyes is improved, the output coordination wavelength range of the whole laser is expanded, and even the laser output is realized in a dye system which can not generate laser output by direct pumping.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a coumarin C440 and C460 co-doped dye tunable laser provided in an embodiment of the present invention;
fig. 2(a) to fig. 2(b) are schematic molecular structures of coumarin C440 and coumarin C460 in a coumarin C440 and C460 co-doped dye tunable laser provided by an embodiment of the present invention;
fig. 3 is a schematic fluorescence spectrum of a conventional single laser dye coumarin C440 provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of an absorption spectrum of a conventional single laser dye coumarin C460 provided by an embodiment of the present invention;
fig. 5 is a schematic fluorescence spectrum diagram of a coumarin C440 and C460 co-doped dye tunable laser provided by an embodiment of the present invention;
fig. 6 is a schematic tuning curve diagram of a coumarin C440 and C460 co-doped dye tunable laser according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
In order to solve the problem of low light-light conversion efficiency when the existing laser dye is single coumarin C440 or 460, please refer to fig. 1, where fig. 1 is a schematic structural diagram of a coumarin C440 and C460 co-doped dye tunable laser provided by an embodiment of the present invention. The embodiment of the invention provides a coumarin C440 and C460 co-doped dye tunable laser, which comprises:
the laser comprises a laser pumping source, an oscillating dye pool and an amplifying dye pool, wherein a first beam splitter is arranged on a transmission light path of the laser pumping source, a first cylindrical mirror is arranged on a light path between the first beam splitter and the oscillating dye pool, a first total reflection mirror, a second beam splitter, a third total reflection mirror and a second cylindrical mirror are arranged on a light path between the first beam splitter and the amplifying dye pool, a third cylindrical mirror is arranged on a light path between the second beam splitter and the oscillating dye pool, a grating and a flat mirror are arranged on an oscillation output light path of the oscillating dye pool, an end mirror, a convex lens and a concave lens are arranged on a light path between the oscillating dye pool and the amplifying dye pool, a mixed laser dye of coumarin C440 and coumarin C460 is arranged in the oscillating dye pool, the mixed laser dye of coumarin C440 and coumarin C460 in the oscillating dye pool is arranged in the amplifying dye pool, the concentration of the coumarin C440 and the coumarin C440 in the amplifying dye pool in the oscillating dye pool are different, the concentration of coumarin C460 in the oscillating dye pool is different from that of coumarin C460 in the amplifying dye pool.
Specifically, in order to obtain high-resolution and high-power tunable laser simultaneously, it is necessary to amplify the narrow-linewidth light output by the oscillation-level dye cell. Therefore, the present embodiment adopts an oscillation-amplification stage structure, the dye laser mainly includes a laser pump source, an oscillation-stage dye cell and an amplification-stage dye cell, and an optical path of the oscillation-amplification stage structure is as shown in fig. 1, specifically:
YAG solid laser, frequency tripling output laser wavelength 355nm, repetition frequency 10Hz, pulse width 7ns, and single pulse energy 95 mJ. Laser output by the laser pump is divided into two beams of pump light after passing through a first beam splitter with the beam splitting ratio of 1:9, and the pump light with 10% of energy enters an oscillation-level dye cell through the first beam splitter and a first cylindrical mirror and is used as the pump energy of the dye laser oscillation level for generating oscillation-level seed light; the pumping light with 90% of energy is reflected by the second beam splitter and the first total reflector and the second total reflector with 355nm, and is divided into two beams of pumping light by the second beam splitter with the beam splitting ratio of 1:9, the pumping light with 10% of energy enters the oscillation-level dye pool through the second beam splitter and the third cylindrical mirror and enters the oscillation-level dye pool as the pre-amplification pumping energy of the oscillation-level seed light, and the pre-amplification of the oscillation-level seed light is realized; in addition, 90% of energy light transmitted by the second beam splitter is reflected by the 355nm third total reflection mirror and the 355nm second cylindrical mirror to enter the amplification-stage dye cell to be used as amplification-stage pump light. Because the service life of the upper energy level of the dye molecule laser is very short and only a few nanoseconds exist, when the seed light reaches the amplification level later than the pump light, most of the excited dye molecules of the amplification level radiate fluorescence in a spontaneous radiation mode, and the amplification efficiency of the seed light is low; when the seed light reaches the amplification stage earlier than the pump light, the gain medium is in the ground state, and stimulated radiation is difficult to form. Therefore, the design of the optical path of the oscillation-amplification stage structure in this embodiment ensures that the amplification stage pump light and the oscillation stage seed light can reach the amplification stage dye cell simultaneously on a nanosecond scale. The first total reflection mirror, the second total reflection mirror and the second total reflection mirror are all reflectors with reflectivity larger than 99%, and the laser wavelength reflected by the reflectors is 355 nm.
The oscillating dye pool is a liquid dye laser resonant cavity and a high-loss resonant cavity containing a frequency selection element, the wavelength tuning is carried out to generate oscillating seed light of a tunable laser, the specific frequency selection element comprises a grating and a plane mirror, the grating is used as a beam expansion element to tune the wavelength of tunable laser, the plane mirror is used as a tuning element, the wavelength tuning element has strong dispersion effect while expanding beams, the incident angles of first-level diffraction light with different wavelengths of the same level to the plane mirror are different, when the plane mirror is rotated to enable the incident angle of a certain wavelength to be zero, the light wave with the wavelength can return to the oscillating resonant cavity with low loss, and light with other wavelengths cannot vibrate due to high loss. The grating of the embodiment adopts a blazed grating, and the laser wavelength of the wavelength tuning system formed by the corresponding blazed grating and the plane mirror is expressed as follows:
λ＝d(sina+sinb) (1)
where a is the incident angle of the laser, b is the diffraction angle of the grating, and d is the number of grating lines. In the present embodiment, the wavelength λ of the output laser light is changed by changing the reflection angle of the plane mirror. The grating-plane mirror combination can shorten the resonant cavity length, has higher conversion efficiency, lower broadband superfluorescence background and can obtain narrower spectral line width, wherein a polygon mirror can be added, and the resonant cavity length is shortened by the combination of the polygon mirror and the grating-plane mirror to obtain higher conversion efficiency, lower broadband superfluorescence background and obtain narrower spectral line width.
In order to enable the output laser to have the characteristics of large energy and high beam quality, the embodiment further uses a laser amplification technology to perform optical amplification on the laser in the amplification dye cell after the narrow-linewidth laser seed light obtained by the oscillation-level resonant cavity passes through the beam shaping optical path. The divergence angle of the oscillating-stage seed light output by the oscillating-stage dye cell is large, and the oscillating-stage seed light is not suitable for directly entering the amplifying-stage dye cell for amplification, so that the light beam is firstly shaped by the end mirror and the light beam shaping light path in the embodiment, the specific light beam shaping light path comprises the convex lens and the concave lens, the shaping light path can enable the amplification efficiency of the amplifying-stage dye cell to be higher, and then the shaped oscillating-stage seed light is reflected to enter the amplifying-stage dye cell.
At present, the pumping light source of dye laser is mainly ultraviolet light and visible region laser, and a high-energy ultraviolet pumping light source is adopted to obtain blue-violet laser output. The laser dye wavelength of the coumarin dye generally covers the range of about 420-580 nm, and in the blue-violet light band, the light-light conversion efficiency of single laser dye coumarin C440 or 460 is about 5%. Researches show that the laser efficiency of the acceptor dye can be greatly improved by co-doping the dye and utilizing the energy transfer between the donor dye and the acceptor dye, so that the light-light conversion efficiency is improved. Therefore, in the embodiment, the laser efficiency of the dye laser medium is improved and the output wavelength range of the dye laser medium is expanded by using energy transfer between dyes through dye co-doping. Specifically, in the dye laser of this embodiment, laser dyes C440 and C460 are used, a donor is selected from C440, and an acceptor is selected from C460, refer to fig. 2(a) to fig. 2(b), and fig. 2(a) to fig. 2(b) are schematic molecular structures of coumarin C440 and coumarin C460 in a coumarin C440 and C460 co-doped dye tunable laser provided by the embodiment of the present invention, where fig. 2(a) is a schematic molecular structure of coumarin C440, and fig. 2(b) is a schematic molecular structure of coumarin C460. For coumarin C440 or coumarin C460, if an excited state molecule D*Transferring its excitation energy to other different ground state molecules A, deactivating themselves to ground state, and transferring the ground state molecules A receiving energy from ground state to excitationThe process of excitation is called energy transfer (energy transfer) if a molecule D in excited state*The excitation energy is transferred to the same species of ground state molecule D, sometimes referred to as energy migration. Energy transfer and energy migration can be expressed as:
D*+A→D+A* (2)
D*+D→D+D* (3)
wherein, excited state D*Is an energy donor and the ground state molecule a is an energy acceptor. To achieve efficient energy transfer, the excitation energy of acceptor A should in principle be less than or equal to the excitation energy of donor D, i.e.
ΔE(D→D*)≥ΔE(A→A*) (4)
The radiative mechanism of energy transfer, also called the ordinary (trivisual) mechanism, is that energy transfer is achieved by emitting radiation from an energy donor, receiving radiation from an acceptor, and achieving an excited state, and this process can be expressed as:
D*→D+hv (5)
A+hv→A* (6)
factors influencing the radiant energy transfer are: fluorescence quantum yield of donor phie(ii) a Number of molecules of acceptor a in the course of emission; absorption Capacity ε of Acceptor AA(ii) a Donor D*Is compared to the absorbance spectrum of acceptor a, and this overlap is generally expressed as a normalized spectral overlap integral J:
combining the above factors, the probability P of the energy transfer occurring of the radiation mechanism in this embodiment is:
where L is the maximum distance over which energy transfer occurs, that is, the probability of an energy transfer occurring by the radiation mechanism is proportional to the acceptor concentration, the maximum distance over which energy transfer can occur between the donor and acceptor, and the spectral overlap integral of the donor and acceptor, and inversely proportional to the fluorescence quantum yield of the donor.
The above studies show that efficient energy transfer between donor and acceptor (radiative or non-radiative) requires a large overlap between the fluorescence spectrum of the donor and the absorption spectrum of the acceptor. Referring to fig. 3 and 4, fig. 3 is a schematic diagram of a fluorescence spectrum of a conventional single laser dye coumarin C440 provided by the embodiment of the present invention, fig. 4 is a schematic diagram of an absorption spectrum of a conventional single laser dye coumarin C440 provided by the embodiment of the present invention, an abscissa of fig. 3 represents a wavelength of the coumarin C440 dye, an ordinate represents an intensity of the coumarin C440 dye, an abscissa of fig. 4 represents a wavelength of the coumarin C460 dye, and an ordinate represents an intensity of the coumarin C460 dye, it can be seen from fig. 3 and 4 that the fluorescence spectrum of the donor C440 and the absorption spectrum of the acceptor C440 both have a large overlap, indicating that an effective energy transfer can occur in the two dye codoping systems used. In this embodiment, the concentrations of coumarin C440 in the oscillating dye pool and coumarin C440 in the amplifying dye pool are different, and the concentrations of coumarin C460 in the oscillating dye pool and coumarin C460 in the amplifying dye pool are different, specifically: the liquid dye in the oscillating-level dye box is as follows: the concentration of the laser dye C440 is 2.4X 10-3mol/L, laser dye C460 concentration of 2.0 × 10- 3mol/L; the liquid dye in the amplification-level dye box is as follows: the concentration of the laser dye C440 is 0.5X 10-4mol/L, the concentration of the laser dye C460 is 0.7X 10-4mol/L; meanwhile, in this embodiment, the volume of the mixed laser dye of coumarin C440 and coumarin C460 in the oscillating-stage dye pool is a first preset volume, the volume of the mixed laser dye of coumarin C440 and coumarin C460 in the amplifying-stage dye pool is a second preset volume, and the first preset volume is smaller than the second preset volume, specifically: the first preset volume is 250ML, and the second preset volume is 750 ML.
From the above analysis, it can be seen that the core physical process in the dye co-doping system is energy transfer, i.e., one excited dye molecule (donor) transfers its excitation energy to other dye molecules, self-deactivates to the ground state, and the dye molecule (acceptor) receiving the energy transits from the ground state to the excited state. The energy transfer between the donor and the acceptor can enhance the fluorescence radiation of the acceptor, improve the laser efficiency of the acceptor, and even realize laser output in a dye system which can not generate laser output by direct pumping, so that the co-doped dye laser is widely regarded by researchers, and the research on the co-doped dye laser medium is of great significance to the dye laser. The output laser tuning wavelength of the coumarin C440 and C460 co-doped dye tunable laser is within the range of 421 nm-482 nm, and the maximum light-light conversion efficiency of the coumarin C440 and C460 co-doped dye can reach 12.2%.
In order to verify the effect of the coumarin C440 and C460 co-doped dye tunable laser provided by the present application, the present embodiment is implemented by the following steps:
step 1: and constructing a light path according to the structural schematic diagram of the laser shown in FIG. 1.
Step 2: preparing a dye solution with a certain concentration, packaging a solvent by adopting absolute ethyl alcohol (with spectral purity of more than 99.7%) and a quartz cuvette with the thickness of 2mm, and measuring by utilizing a UV-3010PC type spectrophotometer of Shimadzu company to obtain an absorption spectrum of laser dye coumarin C440.
And step 3: preparing a dye solution with a certain concentration, packaging a solvent by adopting absolute ethyl alcohol (the spectrum is pure, the purity is more than 99.7%) and a quartz cuvette with the thickness of 2mm, and measuring by utilizing an Andor SR-750 spectrometer to obtain the fluorescence spectrum of the laser dye coumarin C460.
And 4, step 4: absolute ethyl alcohol (with spectral purity more than or equal to 99.7%) is used as a solvent, C440 and C460 are dissolved in an ethanol solution, and the mixture is placed in an ultrasonic bath to be completely dissolved, so that the concentration of the laser dye C440 in the oscillation-level dye pool is 2.4 multiplied by 10-3mol/L, laser dye C460 concentration of 2.0 × 10-3mol/L, the concentration of the laser dye C440 in the amplification level dye cell is 0.5 multiplied by 10-4mol/L, the concentration of the laser dye C460 is 0.7X 10-4mol/L and oscillating grade dyeThe total volume of the mixed solution of the laser dye C440 and the laser dye C460 in the cell is 250mL, and the total volume of the mixed solution of the laser dye C440 and the laser dye C460 in the amplification-grade dye cell is 750 mL.
And 5: preparing a dye solution with a certain concentration, using absolute ethyl alcohol as a solvent (the spectrum is pure, the purity is more than 99.7%), adopting a quartz cuvette with the thickness of 2mm to subpackage samples, adopting an Andor SR-750 spectrometer and an Andor NEWTON electronic multiplexing CCD (EMCCD) to measure the fluorescence spectrum of the mixed dye solution of the amplification-stage dye box, and using a UV-3010PC type spectrophotometer of Shimadzu company to measure and obtain the absorption spectrum of the mixed dye solution of the amplification-stage dye box.
Step 6: the energy of dye laser of the whole coumarin C440 and C460 co-doped dye tunable laser is measured and output by using J-50MB and J-25MB energy meters of Coherent company.
Referring to fig. 5 and fig. 6, fig. 5 is a schematic fluorescence spectrum diagram of a coumarin C440 and C460 co-doped dye tunable laser provided by an embodiment of the present invention, fig. 6 is a schematic tuning curve diagram of a coumarin C440 and C460 co-doped dye tunable laser provided by an embodiment of the present invention, an abscissa of fig. 5 represents a wavelength of the coumarin C440 and C460 co-doped dye tunable laser, an ordinate represents an output laser intensity of the coumarin C440 and C460 co-doped dye tunable laser, an abscissa of fig. 6 represents a wavelength of the coumarin C440 and C460 co-doped dye tunable laser, and an ordinate represents an output laser energy of the coumarin C440 and C460 co-doped dye tunable laser, in this embodiment, the fluorescence spectrum diagram can be obtained by measuring dye laser energy output by the entire coumarin C440 and C460 co-doped dye tunable laser: the C440 and C460 mixture shows excellent performance at the (355nm) third harmonic of an Nd-YAG pumped dye laser system, particularly the peak light-light conversion efficiency at 453nm is 12.2%, compared with the efficiency (about 5%) of the single laser dye C440, the mixed dye performance of the C440 and C460 provided by the application is obviously better than that of the single dye, and the output laser tuning wavelength of the coumarin C440 and C460 co-doped dye tunable laser is 421 nm-482 nm.
In summary, in the tunable laser of coumarin C440 and C460 codoped dye provided by this embodiment, through the codoping of coumarin C440 and C460 laser dyes, the fluorescent radiation of the C460 dye can be greatly enhanced by utilizing the energy transfer between the coumarin C440 and C460 dyes, the laser efficiency of the C460 dye is improved, the output coordination wavelength range of the whole laser is expanded, and even the laser output can be realized in a dye system that can not generate laser output by direct pumping, so that the codoped dye laser is widely regarded by researchers, and the research on codoped dye laser medium is of great significance to the dye laser.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A tunable laser doped with dyes of coumarin C440 and C460 is characterized by comprising a laser pump source, an oscillating dye pool and an amplifying dye pool, wherein a first beam splitter is arranged on a transmission light path of the laser pump source, a first cylindrical mirror is arranged on a light path between the first beam splitter and the oscillating dye pool, a first total reflection mirror, a second beam splitter, a third total reflection mirror and a second cylindrical mirror are arranged on a light path between the first beam splitter and the amplifying dye pool, a third cylindrical mirror is arranged on a light path between the second beam splitter and the oscillating dye pool, a grating and a plane mirror are arranged on an oscillation output light path of the oscillating dye pool, an end mirror, a convex lens and a concave lens are arranged on a light path between the oscillating dye pool and the amplifying dye pool, a coumarin C440 and coumarin C460 mixed laser dye is arranged in the oscillating dye pool, the amplification-stage dye pool is filled with a mixed laser dye of coumarin C440 and coumarin C460, the concentration of the coumarin C440 in the oscillation-stage dye pool is different from that of the coumarin C440 in the amplification-stage dye pool, and the concentration of the coumarin C460 in the oscillation-stage dye pool is different from that of the coumarin C460 in the amplification-stage dye pool.
2. The coumarin C440 and C460 co-doped dye tunable laser according to claim 1, wherein the laser pump source is an Nd: YAG solid laser, the output laser wavelength is 355nm, the repetition frequency is 10Hz, the pulse width is 7ns, and the single pulse energy is 95 mJ.
3. The coumarin C440 and C460 co-doped dye tunable laser of claim 1, wherein the concentration of coumarin C440 in the oscillating stage dye pool is 2.4 x 10-3mol/L, the concentration of coumarin C440 in the oscillating-level dye cell is 2.0 multiplied by 10-3mol/L。
4. The coumarin C440 and C460 co-doped dye tunable laser of claim 1, wherein the concentration of coumarin C460 in the amplification stage dye cell is 0.5 x 10-4mol/L, the concentration of coumarin C460 in the amplification dye pool is 0.7 multiplied by 10-4mol/L。
5. The coumarin C440 and C460 co-doped dye tunable laser according to claim 1, wherein a volume of the coumarin C440 and coumarin C460 mixed laser dye in the oscillating-stage dye pool is a first preset volume, a volume of the coumarin C440 and coumarin C460 mixed laser dye in the amplifying-stage dye pool is a second preset volume, and the first preset volume is smaller than the second preset volume.
6. The coumarin C440 and C460 co-doped dye tunable laser of claim 5, wherein the first predetermined volume is 250 ML.
7. The coumarin C440 and C460 co-doped dye tunable laser of claim 5, wherein the second predetermined volume is 750 ML.
8. The coumarin C440 and C460 co-doped dye tunable laser of claim 1, wherein the first fully reflective mirror, the second fully reflective mirror and the second fully reflective mirror are all mirrors with a reflectivity > 99% and the laser wavelength reflected by the mirrors is 355 nm.
9. The coumarin C440 and C460 co-doped dye tunable laser according to claim 1, wherein the splitting ratio of the first beam splitter and the second beam splitter is 1: 9.
10. The coumarin C440 and C460 co-doped dye tunable laser according to claim 1, wherein the output laser coordination wavelength of the coumarin C440 and C460 co-doped dye tunable laser is 421 nm-482 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010897192.6A CN112202043A (en) | 2020-08-31 | 2020-08-31 | Coumarin C440 and C460 co-doped dye tunable laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010897192.6A CN112202043A (en) | 2020-08-31 | 2020-08-31 | Coumarin C440 and C460 co-doped dye tunable laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112202043A true CN112202043A (en) | 2021-01-08 |
Family
ID=74005136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010897192.6A Pending CN112202043A (en) | 2020-08-31 | 2020-08-31 | Coumarin C440 and C460 co-doped dye tunable laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112202043A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615953A (en) * | 2022-10-10 | 2023-01-17 | 合肥工业大学 | Differential absorption laser radar light source for detecting harmful gas in atmospheric environment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030766U (en) * | 1987-07-25 | 1989-01-11 | 中央民族学院物理系 | Individual tuning multi-wavelength dye laser |
| JP2008147394A (en) * | 2006-12-08 | 2008-06-26 | Furukawa Electric Co Ltd:The | Laser medium for dye laser, dye laser oscillating device, and laser light |
| CN101275040A (en) * | 2008-05-19 | 2008-10-01 | 哈尔滨工业大学 | Preparation for high-performance solid dye laser medium |
| CN101824233A (en) * | 2010-05-04 | 2010-09-08 | 哈尔滨工业大学 | Preparation method of laser medium of co-doped energy-transfer solid dye |
| CN102153285A (en) * | 2010-12-03 | 2011-08-17 | 中国科学院上海光学精密机械研究所 | Preparation method of co-doped dual-wavelength fluorescence output mesoporous aluminum phosphate glass |
| JP2016058752A (en) * | 2015-12-18 | 2016-04-21 | 国立研究開発法人物質・材料研究機構 | Laser oscillation element composed of colloidal crystal gel, and manufacturing method therefor |
| CN205790929U (en) * | 2016-06-01 | 2016-12-07 | 大连华扬科技有限公司 | A kind of dye laser |
-
2020
- 2020-08-31 CN CN202010897192.6A patent/CN112202043A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030766U (en) * | 1987-07-25 | 1989-01-11 | 中央民族学院物理系 | Individual tuning multi-wavelength dye laser |
| JP2008147394A (en) * | 2006-12-08 | 2008-06-26 | Furukawa Electric Co Ltd:The | Laser medium for dye laser, dye laser oscillating device, and laser light |
| CN101275040A (en) * | 2008-05-19 | 2008-10-01 | 哈尔滨工业大学 | Preparation for high-performance solid dye laser medium |
| CN101824233A (en) * | 2010-05-04 | 2010-09-08 | 哈尔滨工业大学 | Preparation method of laser medium of co-doped energy-transfer solid dye |
| CN102153285A (en) * | 2010-12-03 | 2011-08-17 | 中国科学院上海光学精密机械研究所 | Preparation method of co-doped dual-wavelength fluorescence output mesoporous aluminum phosphate glass |
| JP2016058752A (en) * | 2015-12-18 | 2016-04-21 | 国立研究開発法人物質・材料研究機構 | Laser oscillation element composed of colloidal crystal gel, and manufacturing method therefor |
| CN205790929U (en) * | 2016-06-01 | 2016-12-07 | 大连华扬科技有限公司 | A kind of dye laser |
Non-Patent Citations (4)
| Title |
|---|
| G. M. WANG: "Solid State Dye Lasers Based on PMMA co-Doped with PM597 and PM650", 《LASER PHYSICS》 * |
| LATESH TANEJA: "Study of laser behaviour in C-440 and C-485 dye mixture", 《OPTICS COMMUNICATION》 * |
| Y.YANG: "Influence of various coumarin dyes on the laser performance of laser dyes co-doped into ORMOSILs", 《AAALIED PHYSICS》 * |
| 戎华: "基于能量传递的固态染料激光介质及其性能研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615953A (en) * | 2022-10-10 | 2023-01-17 | 合肥工业大学 | Differential absorption laser radar light source for detecting harmful gas in atmospheric environment |
| CN115615953B (en) * | 2022-10-10 | 2024-04-19 | 合肥工业大学 | Differential absorption laser radar light source for detecting harmful gas in atmosphere environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2002242722B2 (en) | Narrow band high power fibre lasers | |
| AU2002242722A1 (en) | Narrow band high power fibre lasers | |
| US7286587B2 (en) | Holmium doped 2.1 micron crystal laser | |
| US20050169323A1 (en) | Scalable laser with robust phase locking | |
| CN103036139A (en) | Narrow-linewidth tunable semiconductor longitudinal single-ended pump rubidium steam laser optical path system | |
| CN103474868B (en) | Output high-power 2 micro wire polarization laser mix thulium full-optical-fiber laser | |
| CN112202043A (en) | Coumarin C440 and C460 co-doped dye tunable laser | |
| CN113363798B (en) | Adjustable high-optical-efficiency broadband multi-longitudinal-mode Raman microchip laser | |
| US6137813A (en) | Yb-doped fiber laser operating near EDFA absorption band | |
| CN108418090B (en) | Intermediate infrared laser | |
| CN113381279B (en) | Narrow-linewidth ultraviolet Raman laser | |
| Ghazy et al. | Experimental investigations on energy-transfer characteristics and performance of some laser dye mixtures | |
| CN203932662U (en) | Kerr lens self mode locking Yb:LYSO laser | |
| RU2300834C2 (en) | Compact continuous solid-state fcd laser (alternatives) | |
| WO2007033432A1 (en) | Solid state laser and resonator | |
| CN104009381A (en) | Yb: LYSO laser for Kerr lens mode self-locking | |
| Georgiev et al. | Metasurface Dichroic Mirrors: Application to Low Quantum Defect Lasers | |
| CN104505705B (en) | It is all solid state from Raman femto-second laser | |
| CN114336252A (en) | Narrow linewidth solid laser | |
| CN203014157U (en) | Narrow-linewidth tunable semiconductor longitudinal single-ended pump rubidium steam laser optical path system | |
| CN113725705B (en) | Green light pulse source based on spectrum shaping | |
| Li et al. | Intracavity Frequency Doubling Deep-Ultraviolet Ho 3+: ZBLAN Fiber Laser with Wavelength Tuning from 269.5 to 275.4 nm | |
| Geethu Mani et al. | Laser performance of rhodamine B and methyl violet B base dye mixture in solid and liquid media | |
| CN113224632A (en) | Femtosecond wide-spectrum difference frequency intermediate infrared laser | |
| Vasilye et al. | Long-wave IR femtosecond supercontinuum generation with Cr: ZnS lasers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210108 |