JPS63175486A - Solid-state laser oscillator - Google Patents

Abstract

PURPOSE:To upgrade the utilizing efficiency of excitation light and to contrive the improvement of an energy conversion efficiency by a method wherein laser oscillation is performed using the luminescence of gas, which is generated in a penetrating hole due to discharge at the time a voltage is applied between electrodes, as the excitation light for a laser medium. CONSTITUTION:When a discharge voltage is applied between a pair of electrodes 15, Xe gas encapsulated by the discharge between the electrodes luminesces in a penetrating hole 11a and a light source for optical pumping is formed in the penetrating hole. In this case, dischargeable gas paths, which pass through the holes of supporting partition walls 13 and pass through the exterior of a laser element 11, are formed between the electrodes 15, but the paths are substantially blocked by the two supporting partition walls 13 having the small holes. Accordingly, as an excited light all passes through the interior of the laser element 11, there is no loss of the excitation light because the excitation light takes part in excitation of a laser medium. Moreover, as an exchange of glass is always performed against the heat-emission of the gas due to the luminescence and a temperature rise can be inhibited, the luminous efficiency of a lamp is also increased. As the excitation light can be generated only in the laser element, an energy conversion efficiency can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a solid-state laser oscillator that obtains laser output using a solid-state laser rod such as YAG.

[Conventional technology]

A conventional fixed laser oscillator is shown in FIG.

It consists of a condenser 1, an arclanzo 2 fixed in parallel inside the condenser, a round bar-shaped laser rod 3, and a reflecting mirror 4 provided in the direction of extension of the axis of the laser rod. The emitted light is focused on the Schillet plot 3 through the condensing path 1 as excitation light for the laser medium, and the light emitted by the excited laser medium is reflected and amplified between two reflecting mirrors 4.

Laser oscillation is performed to obtain output.

[Problems to be solved by the present invention]

In such a laser oscillator, the aberrations of the condenser 1 cause the laser beam loss, the loss due to the light deviating from the laser beam 3, and the energy loss due to reflection, which are not involved in the excitation of the laser medium, but are treated as losses in energy conversion. Become. In addition, these energy losses become a heat source in the condenser 1, so as the output level increases, the temperature inside the condenser increases, which may cause damage to the oscillator parts. It is harmful to

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a solid-state laser oscillator that can increase the energy conversion efficiency by increasing the utilization efficiency of excitation light.

[Means for solving problems]

The solid-state laser oscillator according to the present invention is a laser oscillator that uses a solid-state laser element as a laser medium to obtain laser output, and includes a node-shaped container having nine windows at both ends, and is fixed coaxially within the cylindrical container with the container. This is done by carefully extending the laser element, which includes a laser element having a through hole in its axis, electrodes fixed to both ends of the through hole, and a gas (such as Xe) sealed in the same cylindrical container.

〔Example〕

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. 1st
In the figure, 11 is a cylindrical YAG laser element having a through hole 11A along its axis.

Reference numeral 12 denotes a cylindrical container for holding Xe gas, which holds the laser element 11 in the center via a supporting partition wall 13 having several small holes, and is made of glass for transmitting light. It has windows 14 at both ends.

Reference numeral 15 denotes electrodes for discharging, which are attached to both ends of the through hole 11A, and leave a gas passage 16 between the laser element 11 and the laser element 11 through which gas can freely pass. Reference numeral 17 denotes a reflecting mirror constituting a Fabry-Bello interferometer.

In the above configuration, when a discharge voltage of 17fC is applied to the pair of electrodes, the enclosed Xe gas is discharged from the through hole 1 by the interelectrode discharge.
Light is emitted within 1A, and an excitation light source is formed within the through hole. In this case, a dischargeable gas path is formed between the electrodes 11 through the holes in the support partition 13 and outside the laser element 11, but is substantially blocked by the two support partitions 13 having small holes. Ru.

Therefore, all of the excitation light passes through the laser element and is involved in excitation of the laser medium, so there is no loss.

In addition, in the laser oscillator according to the present invention, since the gas volume for the arc lamp light emitting part is large, the glass is constantly replaced in response to the heat generated by the gas due to two light emissions, and the temperature rise can be suppressed, so the light emission efficiency of the rung is high. Become.

In the above description, not only 12 is named a cylindrical container, but also the laser element 119 and the through hole 11A.

Window 17 etc. are also handled as circular ones.

Needless to say, part or all of it may be made into a shape other than a circle, such as a square.

〔Effect of the invention〕

As described above, according to the present invention, excitation light can be generated only within the laser element.

A solid-state laser oscillator with higher energy conversion efficiency than conventional ones can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a solid-state laser oscillator according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional solid-state laser oscillator. Explanation of symbols = 1 is a condenser, 2 is an arc lamp. 3 is a laser rod, 4 is a reflecting mirror, 11 is a laser element, 1
1A is a through hole, 12 is a cylindrical container, 13 is a support partition, 1
4 is a window, 15 is an electrode, 16 is a gas passage, and 17 is a reflecting mirror. Figure 1 Figure 2

Claims (1)

[Claims] 1. A laser oscillator that uses a solid-state laser element as a laser medium to obtain laser output includes a cylindrical container with windows at both ends, and a through hole coaxially fixed to the center of the cylindrical container. a pair of electrodes fixed to both ends of the through hole, a gas sealed in the cylindrical container, and a reflecting mirror provided on an axial extension of the container, and the electrode A solid-state laser oscillator, characterized in that laser oscillation is performed using light emission of the gas in the through-hole due to discharge when a voltage is applied between the two as excitation light for the laser medium.