JPH06252494A - Solid-state laser equipment - Google Patents

Abstract

PURPOSE:To obtain a solid-state laser device having a good light resistance and an improved frequency stability, by providing in a dye laser element a light emitting material made of a macromolecule compound which has at least one hydroxyl group in its side chain and contains a fluorescent dye. CONSTITUTION:Rhodamine 6G of a predetermined quantity and polyvinylalcohol of a predetermined quantity are dissolved respectively in water, and the resultant solutions are applied to a glass plate and are dried. Thereby, a light emitting material layer is provided on the glass plate and a dye laser element 2 is obtained. Then, by an exciting light source 5, the fluorescence of the fluorescent pigment of the dye laser element 2 is emitted in an inductive way, and a laser oscillation is generated. That is, since a macromolecule compound containing the fluorescent dye has at least one hydroxy group in its side chain, the electron attracting property of the dye laser element is reduced, and its reduction discoloring is hard to be generated, and therefore, its light resistance is improved. Also, in addition to that purpose, by the heat-sinking of the light emitting part of the dye laser element, its frequency stability can be improved.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a solid dye laser device.

[0002]

2. Description of the Related Art FIG. 1 shows, for example, a publication {Zhurunal.
Prikladnoi Spektroskopi
i, Vol. 50, No. 5, p. 711 (1988)
1)} is a block diagram of a general dye laser device shown in FIG. In the figure, 1 is a beam expander, and 2 is a dye laser element configured to emit fluorescence of a monomer, which is obtained by coating a glass plate with a fluorescent dye dissolved in a polymer such as polymethylmethacrylate. 3 is an output mirror, 4 is a diffraction grating, 5 is excitation light, and 6 is output light. Next, the operation will be described. That is, the excitation light 5 is applied to the dye laser element 2.
When excited, it is excited to the singlet state by the excitation light 5 to generate fluorescence and return to the ground state. Output mirror at this time
Light is repeatedly reflected between the diffraction grating 3 and the diffraction grating 4, and when the singlet population becomes larger than that in the ground state, oscillation occurs and output light 6 is emitted.

[0003]

In the case of a dye laser device in which one kind of the above-mentioned conventional fluorescent dye is dissolved in polymethylmethacrylate, the light resistance is poor, and the light resistance of the fluorescent dye (Rhodamine 6G) in an aqueous solution is poor. Even if the technique of adding cyclodextrin for improvement was simply applied to the conventional dye laser, the light resistance was not improved.

The present invention has been made in order to solve the above problems, and obtains a solid-state laser device having good light resistance. Another invention of the present invention is a solid-state laser device having good light resistance and improved frequency stability. A solid-state laser device for the purpose of obtaining a laser device and having improved oscillation efficiency can be obtained.

[0005]

DISCLOSURE OF THE INVENTION A solid-state laser apparatus of the present invention is a dye laser element containing a fluorescent dye, and an exciting laser for oscillating the fluorescent dye of the dye laser element. The dye laser device is provided with a light source, and the dye laser device includes a light emitting material in which a polymer compound having one or more hydroxyl groups in a side chain contains a fluorescent dye.

Another solid state laser device of the present invention comprises:
A dye laser element containing a fluorescent dye and an excitation light source for oscillating the fluorescence of the fluorescent dye of the dye laser element by stimulated emission, wherein at least one dye laser element is present in the side chain. The polymer compound having a hydroxyl group of 1 is provided with a luminescent material containing a fluorescent dye and a cooling means for cooling the luminescent material.

Further, the above-mentioned polymer compound containing an inclusion compound-forming substance is used.

Further, the polymer compound containing the inclusion compound of triplet quencher is used.

Further, as the dye laser element, a transparent substrate provided with a light emitting material layer is used.

[0010]

In the present invention, since the polymer containing the fluorescent dye has one or more hydroxyl groups in the side chain, the electron withdrawing property is low and the reduction fading hardly occurs, so that the light resistance is improved. . In another invention of the present invention, in addition to the above object, the heat stability of the light emitting portion of the dye laser can be dissipated to improve the frequency stability. Also,
When the inclusion compound forming substance dye includes the fluorescent dye molecule, it is prevented from being attacked by singlet oxygen, and the fluorescent dye molecule is light-stabilized to further improve the light resistance and have a long life. When the inclusion compound of triplet quencher is contained, the triplet lifetime of the dye is shortened and the efficiency of laser oscillation is improved.

[0011]

EXAMPLES As the polymer having one or more hydroxyl groups in the side chain according to the present invention, polyvinyl alcohol, polyhydroxyethyl acrylate, polyhydroxymethacrylate, cellulose and the like are used. Examples of the fluorescent dye according to the present invention include stilbene, coumarin, rhodamine, LD700, oxazine, 4-dicyanomethylene-
2-Methyl-6- (p-diaminostyryl) -4H-pyran (DCM) and the like are used. The inclusion compound-forming substance according to the present invention includes α, β, γ-cyclodextrin, dimethyl-β-cyclodextrin, caffeine,
Sodium deoxycholate and flavone are used. As the inclusion compound of the triplet quencher according to the present invention, a triplet quencher such as cyclooctatetraene clathrated with an inclusion compound forming substance such as cyclodextrin is used. Here, cyclooctatetraene is not dispersed in water-soluble polyvinyl alcohol unless it is clathrated with cyclodextrin or the like.

Example 1.0.04 parts by weight of Rhodamine 6
G and 10 parts by weight of polyvinyl alcohol dissolved in 100 parts by weight of water are applied to a glass plate and dried to form a light emitting material layer on the glass plate, and the dye laser element 2 according to one embodiment of the present invention is prepared. obtain. Next, as shown in FIG. 1, the excitation light source 5 stimulates and emits the fluorescence of the fluorescent dye of the dye laser element 2 to cause laser oscillation. At this time, 51
When excited at 1 nm, the laser oscillation efficiency at 580 nm was 50%, and the oscillation efficiency after 10 hours was 45%. As described above, the deterioration of the oscillation efficiency after a certain period of time is small, and the light resistance is excellent.

Example 2. 0.01 part by weight of Rhodamine 6
A solution of G in 100 parts by weight of water was dipped in a cellulose film and dried to obtain a dye laser device 2 according to another embodiment of the present invention, which was oscillated in the same manner as in Example 1.
At this time, the laser oscillation efficiency at 580 nm by excitation at 511 nm was 45%, and the pregnancy efficiency after 10 hours was 43%. As described above, the deterioration of the oscillation efficiency after a certain period of time is small, and the light resistance is excellent.

Comparative Example 1. 0.05 part by weight of Rhodamine 6
A solution in which G and 10 parts by weight of polymethylmethacrylate were dissolved in 100 parts by weight of acetone was applied on a glass plate and dried to obtain a dye laser element 2, which was oscillated in the same manner as in Example 1. At this time, the 580 nm laser oscillation efficiency when excited at 511 nm is 50%, and the oscillation efficiency after 10 hours is 2%.
It was 0%. As described above, the oscillation efficiency is significantly reduced after a certain period of time, and the light resistance is inferior to the examples.

Example 3. A solution prepared by dissolving 0.04 parts by weight of Rhodamine 6G, 0.5 parts by weight of dimethyl-β-cyclodextrin and 10 parts by weight of polyvinyl alcohol in 100 parts by weight of water was applied to a glass plate in the same manner as in Example 1. Then, the dye laser element 2 according to another embodiment of the present invention was dried and oscillated in the same manner as in the first embodiment. At this time 51
The 580 nm laser oscillation efficiency when excited at 1 nm was 50%, and the efficiency after 10 hours was 48%. As described above, the deterioration of the oscillation efficiency after a certain period of time is further reduced, and the light resistance is further excellent.

Example 4. 0.04 parts by weight of Rhodamine 6
A solution prepared by dissolving G, 0.5 parts by weight of caffeine, and 10 parts by weight of polyvinyl alcohol in 100 parts by weight of water was applied to a glass plate in the same manner as in Example 1 and dried to carry out another embodiment of the present invention. The dye laser element 2 according to the example was obtained and oscillated in the same manner as in Example 1. At this time, the 580 nm laser oscillation efficiency when excited at 511 nm was 50%. The efficiency after 10 hours was 48%. As described above, the deterioration of the oscillation efficiency after a certain period of time is further reduced, and the light resistance is further excellent.

Example 5. 0.05 parts by weight of Rhodamine 6
G, 0.1 parts by weight of a cyclooctatetraene-α-cyclodextrin inclusion compound and 10 parts by weight of polyvinyl alcohol were dissolved in 100 parts by weight of water, applied to a glass plate in the same manner as in Example 1, and dried. Then, a dye laser device 2 according to still another embodiment of the present invention was obtained and oscillated in the same manner as in the first embodiment. 580n at 511nm excitation at this time
The m laser oscillation efficiency is 60%, and the oscillation efficiency is greatly improved.

Example 6. FIG. 2 is a configuration diagram of a dye laser device according to another embodiment of the present invention. In the figure, 7 is a light emitting material layer, 8 is a glass plate, 9 is a sealant,
Reference numeral 10 is a water inlet, 11 is a drain port, and 13 is cooling water. The cooling water 13 dissipates the heat of the light emitting material layer 7. That is, 0.04 parts by weight of Rhodamine 6G and 10 parts by weight of polyvinyl alcohol dissolved in 100 parts by weight of water are applied to a glass plate 8 and dried to form a light emitting material layer 7, and a dye laser element is formed. Oscillation was performed in the same manner as in Example 1. At this time, if the temperature is kept at 30 ° C, the oscillation frequency becomes 580.02.
It was 5 ± 0.0001 nm, which was constant for 1 hour, and the stability of the oscillation frequency was observed.

[0019]

As described above, the present invention is provided with a dye laser element containing a fluorescent dye and an excitation light source for inducing the fluorescence of the fluorescent dye of the dye laser element to cause laser oscillation. Since the dye laser element includes a light emitting material in which a polymer compound having one or more hydroxyl groups in a side chain contains a fluorescent dye, a solid-state laser device having excellent light resistance can be obtained. it can.

Another invention of the present invention comprises a dye laser element containing a fluorescent dye and an excitation light source for inducing and emitting the fluorescence of the fluorescent dye of the dye laser element to cause laser oscillation. Since the laser element is provided with the light emitting material in which the polymer compound having one or more hydroxyl groups in the side chain contains the fluorescent dye and the cooling means for cooling the light emitting material, the laser element has excellent light resistance and frequency. A solid-state laser device having excellent stability can be obtained.

Further, when the polymer compound contains an inclusion compound forming substance, the light resistance is further improved, and when the polymer compound contains a triplet quencher inclusion compound, the oscillation efficiency is improved. To do.

Further, as the dye laser element, a transparent substrate provided with a light emitting material layer is used.

[Brief description of drawings]

FIG. 1 is a block diagram of a general dye laser device.

FIG. 2 is a configuration diagram of a dye laser device according to another embodiment of the present invention.

[Explanation of symbols]

 2 Dye laser element 5 Excitation light source 7 Luminescent material layer 12 Cooling water

Claims (5)

[Claims] 1. A dye laser element containing a fluorescent dye, and an excitation light source for inducing fluorescence of a fluorescent dye of the dye laser element to cause laser oscillation, wherein the dye laser element has a side chain. A solid-state laser device comprising a light-emitting material containing a fluorescent dye in which a polymer compound having one or more hydroxyl groups is contained. 2. A dye laser element containing a fluorescent dye, and an excitation light source for inducing the fluorescence of the fluorescent dye of the dye laser element to cause laser oscillation, wherein the dye laser element is a side chain. A solid-state laser device comprising a light emitting material containing a fluorescent dye in which a polymer compound having one or more hydroxyl groups and a cooling means for cooling the light emitting material. 3. The solid-state laser device according to claim 1, wherein the polymer compound contains an inclusion compound-forming substance. 4. The solid-state laser device according to claim 1, wherein the polymer compound contains an inclusion compound of a triplet quencher. 5. A solid-state laser device according to claim 1, wherein the dye laser element is a transparent substrate provided with a light emitting material layer.