JPH0797677B2 - Chemically excited iodine laser device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a chemically excited iodine laser device in which a vapor trap is built in a vertical (vertical) excited oxygen generator of a gas-liquid reaction type (for example, bubbler). It is about.

[Conventional technology]

Recently, chemically pumped iodide laser
ne laser: CPIL) has been researched and succeeded in high-power laser oscillation of 1.315 μm wavelength. This CPIL does not require electric energy as a pumping source for laser oscillation,
It has the advantage that it can oscillate with a chemical fuel and has a relatively simple structure.

The basic principle of CPIL is the energy transfer reaction according to the following equation.

O ^* ( ¹ Δ) + I ( ² P _3/2 ) O ₂ ( ³ Σ) + I ^* ( ² P _1/2 ) ……
(1) Since the reaction from the left side to the right side is fast in the equation (1), efficient pumping is performed and I ^* ( ² P _1/2 ) is generated. This I
^* ( ² P _1/2 ) serves as the laser medium and emits laser light with a wavelength of 1.315 μm. Here the most important is a pumping source O ^* ₂ a ⁽¹ delta) is how efficiently generated. The most efficient method currently known is the decomposition reaction of hydrogen peroxide represented by the following formula.

H ₂ O ₂ + 2NaOH + Cl ₂ → O ^* ₂ + 2H ₂ O + 2NaCl …… (2) Sodium hydroxide solution is added to the hydrogen peroxide solution to make it alkaline, and then chlorine gas is bubbled into this mixed solution to produce O ^* ₂ ( ¹ Δ) easily occurs.

Conventionally, a chemically-excited iodine laser device having a vertical (vertical) excited oxygen generator, a water vapor trap outside the generator, a laser resonator, and a vacuum pump as main components has already been known.

In this conventional device, a droplet scattering prevention space for preventing droplets generated by the gas-liquid reaction from scattering to the oscillation part (resonance part) on the downstream side of the generator, that is, a dead space is excited. It is installed in the upper part of the oxygen generator.

[Problems to be Solved by the Invention]

In the conventional chemically excited iodine laser device, since the water vapor trap is provided outside the excited oxygen generator,
It was difficult to make the entire device compact. Further, since the contact time between the generated excited oxygen and water vapor is long, the deactivation amount of the excited oxygen increases, and further, the residence time of the excited oxygen to the resonator becomes longer. There was a problem that the club was deactivated.

The present invention has been made in view of the above points, and by incorporating a water vapor trap in an excited oxygen generator, that is, by providing it in a droplet scattering prevention space (dead space) in the generator, compactification is achieved. In addition to being able to achieve this, water vapor can be removed in a short time after the excited oxygen is generated, and the residence time of the excited oxygen to the resonator (re
It is an object of the present invention to provide a chemically excited iodine laser device capable of reducing sidence time) and reducing the deactivation amount of excited oxygen.

[Means for Solving the Problems]

A chemically excited iodine laser device of the present invention will be described with reference to the drawings. A vertical oxygen generator 1 for generating excited oxygen by a gas-liquid reaction between an alkaline hydrogen peroxide aqueous solution and chlorine gas, and excited oxygen A laser resonator 2 that is brought into contact with iodine to excite iodine by energy transfer reaction from excited oxygen to iodine to obtain laser oscillation, and a vacuum pump 3 that holds each of the above devices in a depressurized state are main constituent devices, In a chemically excited iodine laser device in which a droplet scattering prevention space is provided in the upper part of the oxygen generator in order to prevent droplets from scattering downstream of the oxygen generator, the droplet scattering prevention in the oxygen generator 1 is prevented. The space 6 is provided with a water vapor trap 7 for aggregating and removing the water vapor in the excited oxygen by cooling and freezing the water vapor.

[Work]

The alkaline hydrogen peroxide solution supplied into the vertical (vertical) oxygen generator 1 and the chlorine gas come into gas-liquid contact with each other, and excited oxygen is generated by the above-mentioned reaction formula (2), and the generator is immediately generated. Inside, the water vapor is cooled by the water vapor trap 7, and the water vapor is removed as ice. Excited oxygen that has exited the oxygen generator 1 is sent to the laser resonator 2 with a short residence time and efficiently generates laser light with a wavelength of 1.315 μm.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the shape of the constituent devices described in this embodiment, the relative arrangement thereof, and the like, unless otherwise specified, are not intended to limit the scope of the present invention only to them, and are merely illustrative examples. Only.

In FIG. 1, 1 is a vertical (vertical) oxygen generator, 2
Is a laser resonator, 3 is a vacuum pump, 4 is an alkaline hydrogen peroxide aqueous solution supply pipe, and 5 is a chlorine gas supply pipe (bubbler).
Is.

The above is the configuration of the conventional chemically excited iodine laser device.
In this configuration, the water vapor trap 7 is provided in the droplet scattering prevention space 6 which is the gas phase portion in the oxygen generator 1. 8
Is a refrigerant inlet, 10 is a refrigerant outlet, and 11 is a valve.

In the apparatus configured as described above, the aqueous alkaline hydrogen peroxide solution supplied into the oxygen generator 1 and the chlorine gas supplied from the chlorine gas supply pipe 5 are brought into gas-liquid contact with each other, and the reaction formula ( 5) Excited oxygen is generated and immediately cooled by the refrigerant in the water vapor trap 7, the water vapor contained in the excited oxygen is frozen and aggregated on the outer surface of the water vapor trap 7 as ice. As the refrigerant, for example, alcohol dry ice (alcohol cooled with dry ice) or the like is used.

As described above, since the water vapor is removed in a short time after the generation of excited oxygen, the contact time with water is reduced, and the amount of deactivation is extremely small. The excited oxygen from which the water vapor has been removed is sent to the laser resonator 2 in a short residence time. For this reason,
The amount of deactivation can be further reduced.

As shown in the figure, the water vapor trap 7 is composed of a heat transfer tube such as a serpentine tube and can have a large heat transfer area. In order to remove the ice adhering to the water vapor trap, as shown in FIG. 2, a vibration device 12 is connected to the water vapor trap 7 so that it can vibrate, and the heat transfer tube is formed of a flexible tube. Then, when ice adheres, it is convenient to apply pressure to expand the tube and drop the ice.

〔The invention's effect〕

In the present invention, as described above, since the water vapor trap is provided in the space for preventing liquid droplets from scattering in the vertical type (vertical type) excited oxygen generator, it is possible to make the entire apparatus compact, and Since the water vapor is removed in a short time after the generation of excited oxygen and the residence time to the resonator is shortened, it has an effect of reducing the amount of deactivated excited oxygen.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of the chemically excited iodine laser device of the present invention, and FIG. 2 is an explanatory diagram showing another example of the device of the present invention. 1 ... Oxygen generator, 2 ... Laser resonator, 3 ... Vacuum pump, 4 ... Alkaline hydrogen peroxide aqueous solution supply pipe, 5 ...
… Chlorine gas supply pipe, 6 …… Space for preventing droplet scattering, 7
…… Steam trap, 8 …… Refrigerant inlet, 10 …… Refrigerant outlet, 11 …… Valve, 12 …… Vibration device

Front page continuation (72) Hiroo Fujii Inventor Hiroo Fujii 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. Kobe factory (56) Reference US Patent 4342116 (US, A)

Claims (1)

[Claims] 1. A vertical oxygen generator for generating excited oxygen by a gas-liquid reaction of an alkaline aqueous hydrogen peroxide solution and chlorine gas, and an energy transfer reaction from excited oxygen to iodine by bringing excited oxygen and iodine into contact with each other. A laser resonator that excites iodine to obtain laser oscillation, and a vacuum pump that holds the inside of each device in a depressurized state as main constituent devices, and in order to prevent droplets from scattering downstream of the oxygen generator, the oxygen In a chemically excited iodine laser device provided with a space for preventing droplet scattering in the upper part of the generator, in the space for preventing droplet scattering in the oxygen generator, water vapor in the excited oxygen is cooled and frozen as ice. A chemically excited iodine laser device having a water vapor trap for aggregating and removing.