JPS62217685A - Solid-state laser oscillator - Google Patents

Abstract

PURPOSE:To lessen the number of the parts needed for a solid-state laser oscillator by a system which circulates a fluid by a method wherein the heat which is generated at the power source part is cooled and a laser substance which is required a high-temperature operation is so contrived as to be kept at high temperature by the heat absorbed at the time of this cooling action. CONSTITUTION:An excitation lamp 5 of a laser oscillation part 1 discharges when being impressed a DC voltage from a power source part 2. At the time of operation of laser oscillation, heat is generated by a charging resistor 17 and the air around the charging resistor is heated. The heated air is turned into hot air by a fan 20, passes through a duct 21 having a filter 22, led in a converging/reflecting mirror 3 passing through a mounting means 4a on one side and keeps a laser substance 6 at high temperature. The temperature of the hot air is controlled by variably regulating the air quantity by the fan 20 and the laser substance is kept at about 80 deg.C. The hot air is sent to the excitation lamp 5 as well, but the excitation lamp is subjected to the cooling action as being a heating element unlike the laser substance 6.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a solid-state laser oscillation device.

(Prior Art) Japanese Patent Laid-Open No. 51-82591 discloses a laser oscillator incorporating a single crystal of beryllium aluminate with a chrysoberyl structure as a laser material.

It is disclosed in Japanese Patent Application Laid-Open No. 55-56678. It is known that the above-described laser material exhibits a property different from that of other solid-state lasers such as YAG lasers, in that the laser gain increases as the temperature rises above room temperature (20 to 30° C.). Conventionally, it has been known to circulate and contact this laser material with a fluid such as water, air, or frozen fluid kept at a relatively high temperature by a heater to maintain it at a predetermined temperature. However, the above-mentioned method of circulating fluid requires a complicated device.

In particular, when circulating liquids such as water, not only must precautions be taken to prevent leakage, but the structure also causes serious problems due to leakage at night.

(Problems to be Solved by the Invention) As described above, conventional devices have elements that cause the structure to become complicated and accidents to occur. Therefore, an object of the present invention is to provide a solid-state laser oscillation device having a structure that eliminates these problems.

[Structure of the invention]

(Means and effects for solving the problem) The laser material, which exhibits the property that the laser gain increases as the temperature increases within a predetermined temperature range, is heated to a predetermined temperature using heat from the power source. The system was designed to simplify the device.

(Example) EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained based on drawing which shows an Example.

The device shown in the drawings is roughly divided into a laser oscillation section (1) called a head section and a power supply section (2) that supplies a predetermined power to the laser oscillation section (1). First, the laser oscillation unit (1) includes a condensing reflector (3) whose inner surface is formed into an elliptical reflective surface, and a mesh-like fixture (4a) made of an insulating material attached to both ends of the condensing reflector (3). ), (4
The excitation lamp (5) and the laser material (6) are housed in parallel to each other in the interior of the condensing reflector (3) by the support of b), and one end surface of the laser material (6) is coated. The total reflector (force) is supported by a three-dimensionally adjustable support (8) near the other end face, and is composed of the total reflector (force) and an output mirror (9) constituting an optical resonator. The above laser material (6) is kept at room temperature (20~30℃
), the laser gain increases as the temperature increases, such as a single crystal of beryllium aluminate doped with trivalent chromium. Further, the condensing reflector (3) is provided on a pedestal (10) to which the support body (8) is fixed, and includes the pedestal 0I, the condensing reflector (3), the output mirror (9), etc. is surrounded by a housing aυ. A part of the housing Uυ is equipped with a laser beam (L).
A window a2 is provided for passing through the window a2. On the other hand, the power supply unit (2) that applies the excitation lamp (5) in the laser oscillation unit (1)
) is a transformer ([5
1, and a rectifier circuit section αω that converts the current transformed by this transformer haze into direct current.

In the power supply unit 2, it is composed of a charging/discharging capacitor α barrel that stores charge through a charging resistor η, and a check coil (I) that stabilizes the discharge in the excitation lamp (5). , a fan (21J
is provided, and the wind generated by this fan /:2G flows through a duct that surrounds the charging resistor a and opens at one end of the laser material (6), that is, near the total reflector (7). ) (2]). In addition.

A filter is provided in the middle of the duct H2υ.

With the above configuration, during laser oscillation operation.

The laser substance (6) is heated by the heat generated by the charging resistor 117), that is, the fan Cυ, which removes the above heat and passes through the duct ■υ and through one of the fittings (4a). The temperature is maintained by hot air guided into the condensing reflector (3). The temperature of the hot air is controlled by varying the air volume of the fan, and is normally maintained at around 80°C. Note that the hot air is also blown toward the excitation lamp (5), but unlike the laser material (6), it is a heating element, so it is subjected to a cooling effect.

Note that the heat exchange part in the power supply section (2) is not limited to the charging resistor, and may be any part that generates a sufficient amount of heat, such as a transformer.

〔Effect of the invention〕

The heat generated in the power supply section is cooled down, and the heat taken away during this cooling action is used to maintain the laser material, which requires high-temperature operation, at a high temperature, making it possible to construct a device with a small number of parts. , miniaturization was achieved.

[Brief explanation of drawings]

The drawing is a configuration diagram showing an embodiment of the present invention. (1) --- Laser oscillation section (2)...Power supply section (5)...excitation lamp (6)...laser material αη・・・Charging resistance (b)...Fan CI)...Duct Agent Patent Attorney Rule Between Bamboo Flower Kikuo

Claims (1)

[Claims] A laser material exhibiting the property that the laser gain increases as the temperature increases within a predetermined temperature range, an excitation lamp that excites this laser material, and light that emits laser light by optically resonating the pumping light generated by the excitation. A solid-state laser oscillator comprising a resonator and a power source for causing the excitation lamp to emit light, wherein the laser material is heated to a predetermined temperature using heat generated in the power source.