JPS60165783A - Colorant laser device - Google Patents

Abstract

PURPOSE:To increase the average output by forming a plurality of exciting light source, and selecting the timing of the oscillation in response to the number of the sources. CONSTITUTION:A colorant solution 1 is sealed in a colorant cell 2. A beam expander 6 is provided oppositely to one end of the cell 2, and an etharon 7 and a grating 8 are further provided. The grating and a mirror 3 are operated as a light resonator. Pulse solid laser oscillators 9, 10 are provided as light sources for exciting the solution 1. The maximum oscillation repetition frequencies of the oscillators 9, 10 are set to NHz, and the oscillator 10 is displaced by 1/2N sec with respect to 1/Nsec period of the oscillator 9, and oscillated. The solution 1 is excited at a period of 1/2Nsec by the laser lights 11, 12 emitted alternately, and the maximum oscillating repetition frequency of the oscillator becomes 2NHz. When the output of the colorant laser light is P Joule per pulse, the maximum average output of the light 15 is 2NXP watts.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to dye laser devices.

[Technical background of the invention and its problems]

In recent years, the application of lasers to the chemical field has become active, and it has become common to selectively generate substances or accelerate the generation of substances by irradiating laser light. In this case, the laser used often requires a light wavelength unique to the substance to be produced or used as a raw material, and it is necessary to match the wavelength of the laser output light to that wavelength.

Dye lasers have been commonly used as lasers that can vary the wavelength of laser output light. 12 Examples of laser applications in the chemical field in actual plants.

The laser beam requires a high average output of several watts to several hundred watts. In other words, the dye laser is required to operate at a high repetition rate in addition to the energy per pulse of the dye V-laser output.

However, in conventional dye laser devices, 532 nm oscillation YAG v-za, Rxclmer, etc. are used as excitation pulse lasers.
Laser, Ar io:/v-the, Kr-i) r7v-the t
' Because YAG lasers are used, the oscillation repetition frequency is limited to several hundred ITz, or several tens of kilometres.
Even if a repetition rate of Hz to several hundred MHz could be obtained, there was a problem in that it was not suitable as an excitation laser with a high average output necessary to obtain a predetermined large average output from a dye laser.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a dye laser device that has a high average output and is capable of oscillating at high repetition rates.

[Summary of the invention]

In the dye laser device, the excitation light source is at least one pulse oscillation light source, and these light sources are configured to perform an excitation action alternately.

[Embodiments of the invention]

The present invention will be explained below with reference to Examples.

Figure 1 shows an example applied to a dye laser oscillation device.

(1) is a dye solution, and (2) is a tubular dye cell made of quartz or the like that encloses this solution. An output mirror (3) is provided opposite one end surface of the dye cell (2).

A beam echinoder (6) consisting of a combination of a concave lens (4) and a convex lens (5) is provided opposite to the other end surface,
Further, an etalon (force and grating (8)) is provided in a direction that is sequentially moved away from the other end surface.

The grating (8) and the output mirror (3) are coaxially located to function as an optical resonator. Two pulsed solid-state laser oscillators (hereinafter referred to as oscillators) (9) and (11) are provided as light sources for exciting the dye solution (1) sealed in the dye cell (2).These oscillators Laser light aυ emitted from
On the optical path at side a, there is a cylindrical lens Q3 as a focusing optical system.
) and (14) are respectively provided at positions for linearly focused irradiation onto the side surface of the dye solution (1). In addition.

0 is a dye laser beam.

Next, the operation of the dye laser oscillator having the above structure will be explained. The maximum oscillation edge repetition wave number of two oscillators (9) (II) is set to N hertz, and for the tinging of one of the oscillators (9) shown in Fig. 2 (a), which oscillates with a period of 14 seconds. Then, oscillation is performed with a 1/2N second shift as shown in Φ) in the same figure. The laser beams (11) and H dye solution (1) alternately emitted by such oscillation are shown in Figure 2(c).
The maximum oscillation line υ return frequency of a single dye laser oscillator excited with a period of 1/2N seconds is 2N hertz. That is, in the case of a configuration in which only one of the two oscillators (9) and QI is provided, the output of one dye laser beam is set as IP units per pulse.

Since the average output of the dye laser beam is NxP watts, obtaining the above value of 2N hertz means that the maximum average output of one dye laser beam OQ is 2NxP watts.

Although two excitation light sources are provided in the embodiment described in 11 above, two or more excitation light sources may be provided and each excitation light source may be excited at different timings since the excitation light sources are in the average output direction.

〔Effect of the invention〕

As described above, by using a plurality of excitation light sources and selecting the oscillation timing according to the number of excitation light sources, it is now possible to increase the average output.

It has become possible to apply it to analogy chemical plants.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is a waveform diagram showing oscillation timing. (1)...Dye solution (2)...Dye cell (3)・
... Output mirror (8) ... Crating (9),
(II... Pulse solid-state laser oscillator C1 book, Q4)
...Cylindrical lens Figure 1 Figure 2

Claims (1)

[Claims] In a dye laser device comprising a dye solution serving as a laser medium, a dye cell filled with the dye solution, an excitation light source for exciting the E dye solution, and a vanguard and an eyepiece provided between the dye cell, the excitation light source 2. A dye laser device, characterized in that said dye solution is configured to alternately receive excitation light from at least two pulsed light sources, and the dye solution receives excitation light from these pulsed light sources alternately.