JPS60194589A - Slab type solid-state laser oscillation device - Google Patents

Abstract

PURPOSE:To enable long-time use without the need to keep the surface of a solid-state laser medium in mirror form, by a method wherein the solid-state laser medium is contained in a container, which is also filled with a matching oil having the same refractive index as that of said medium. CONSTITUTION:Flash lamps 10 and 10' as the light source for excitation are arranged in lamp houses 9 and 9' respectively, and the coolant flows through preferably many inlets 11 and 11' and outlets 12 and 12' provided on both sides right and left of the lamp houses 9 and 9'. When light is pumped by the flash lamps 10 and 10', a laser beam oscillates, by excitation of laser oscillation ions in the laser medium 4. However, since the internal space of the container 1 containing the laser medium 4 is filled with the matching oil 6 having the same refractive index as that of the medium 4, the laser beam is reflected not on the surface of the medium 4 but on the inner surface of the container 1; thereby, it is not necessary to keep the surface of the medium 4 in mirror form.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slab-type solid-state oscillator equipment.

1. Prior Art" A solid-state laser oscillates light by pumping light into a flash lamp, etc., but the light is absorbed by active ions in the laser medium. , the temperature from the surface of the laser medium generates a temperature gradient, which causes significant thermal strain in the laser medium. This thermal strain disturbs the oscillation pattern and mode of the laser beam, causing moss In order to solve this problem, a slab-type solid-state laser oscillation device has been proposed (Rayleigh Handbook, edited by the Rayleigh Society of Japan, 1982). (Published December 15th, 231 pages)
. This method uses a homogeneous Rayleigh medium in the form of a slab, and uses total reflection to pass light in a zigzag pattern, thereby preventing the effects of thermal strain mentioned above. Since light passes between opposing planes of the medium in a zigzag pattern, the light from the lever C passes through the high-temperature surface and the center of the low mountain 1 with the same optical path length C) and tτ. (It is possible to prevent optical path differences from occurring, to prevent disturbances in the mode and pattern of the laser beam, and to prevent the temperature distribution in the medium from being destroyed by thermal strain.)
, it is possible to oscillate a laser beam without disturbing the code or oscillation pattern.

However, conventional slab-type solid-state oscillators
the light! A! ? There was a drawback that J3<>4J had the disadvantage that the inner and outer surfaces of the medium needed to take full advantage of total reflection during f should always be kept perfectly mirror-like.
However, when using a glass laser medium, glass with good relay performance has poor chemical durability, whereas a slag type relay medium is safe and cannot be used for a long period of time (2).
, :,, - However, the surface becomes cold due to long-term use7. II A reaction occurs with the medium (water for Suitsu)! It is impossible to maintain the original mirror surface due to stiffness, elution, and further reaction with water vapor in the atmosphere during the drying period, resulting in a decrease in efficiency.

1. Purpose of the Invention] The present invention eliminates the drawbacks of the conventional method as described in L above, maintains the surface of the solid Rayleigh medium in a mirror-like state, eliminates the need for 'Ca3 <, and can be used for a long period of time. The purpose is to provide a -11 oscillation device with a solid-state shape.

[Structure of the Invention] In order to achieve the object of the present invention, a container having both end faces formed at Brewster's angle and having both end faces and parallel opposing sides made transparent, It houses a solid-state laser medium and has a +f+) configuration filled with a mapping mail that has the same refractive index as the solid-state laser medium.

[5R, Ming Example” Embodiments of the invention shown in the drawings will be described below.

Fig. 1.2 shows an embodiment of the present invention, in which both end faces 2.2' are formed at a bristle star angle, and both end faces 2.2'
'O J, and η Ni flat (opposed to J.) - both sides3.
3' is transparent, and both end faces 2.2' and both side faces 3.3' are optically mirror-polished (σ) on the surfaces of appropriate transparent parts, and both end faces 2.2' and both side faces 3.3' are made optically mirror polished (σ). 2′ counter-use defense 11
- When the laser medium is irradiated with a multilayer film,
Ray IF medium 4 and both end surfaces 2.2' and both side surfaces 3.3'
The space inside the container 1 formed between the laser medium 4 and
The matting oil 6 is swirled with the same till refractive index, and the matting oil 6 is provided on both the left and right sides of the container 1 (
The laser medium 4 is cooled by flowing through the container 1, preferably through a plurality of inflows 1'7 and outflows [8].
For example, the container 1 has both end faces 2.2'J3 and both side faces 3.3'
The surface of the plate is polished to an optical mirror surface by 1σ1 and has a reflection resistance against light with a wavelength of 1.05 μn1. The anti-IL film is shielded and the fc is removed from the components on both end faces 2.2' (screwed through the backing hole for liquid leakage prevention 1F, transparent 1 with a thickness of 2 mm) - Noah By making the surface of the handle optically mirror-like (σ1 polished) and fixing it with screws through the leak-preventing IL fittings as the component parts 3 and 3' on both sides, First, remove the screws 1 and 1) to secure the laser medium 4 to the support frame 5.5'F stainless steel frame. Assuming the laser medium v”14, N
d (phosphorus containing neodymium)) I! ij! Qf Ray 1
F Glass L IG 8 (manufactured by Hoya Glass Co., Ltd.) with A7 Mondo whetstone No. 320? dl polish-(j9sa9
mm, width 4om, length 'iL 150mm, both end faces are 3
No slope of 0 degrees! The refractive index 025 of this glass laser medium 4 is 1.52005. In this case, the mapping A file 6
Then, 2-di-group naphthalene with a refractive index n of 1.63321 is dissolved in carbon tetrachloride, and 1 r120-1.5200! It can be used by adjusting the refractive index of i.

Reference numeral 9.9' denotes a lamp house which is arranged above and below the container 1 with both side surfaces 3.3' of the container 1 as boundary surfaces, and whose inner surface is a reciprocal surface. 10.10' lamps 10.10' and 10.10' are arranged respectively on the right side of the lamp house 9.0' (preferably a large number of inflow lamps 111.11' J
, and through the outflow 12.12' the cooling medium (generally water) of the lamp 10.10' is allowed to flow. Then, in the state d3 where the cooling medium has been handled from C Landsbaus 9.9', the container 1 is moved to a predetermined position n between the lamp houses 9.9' while containing the Rayleigh medium 4.
C (can be removed) by an appropriate attachment/detachment means (not shown)
(2) Also, it is configured to be installed in a predetermined position. 13 is a full-reflection mirror with a multilayer film that reflects 100% of the seer light, and 14 is a mirror that reflects the Rayleigh light by 100%.
There are 4 semi-reversed mirrors C with a reflection layer film of about 10% (=J).

The above-mentioned Rayleigh oscillator ff consists of Flood-2 lamp 1
0.10' laser medium 4
By exciting the Rayleigh oscillator inside A, a C laser beam is emitted. Since the matching mail 6 on the right is i63 l, the laser beam is not reflected on the surface of the laser medium 4 but is reflected on the inner surface of the container 1. Therefore, the surface of the laser medium 4 needs to be kept mirror-like and covered. There is no.

In the above embodiment, both end faces 2.2'J3J of the container 1:
7'-(A
The IC is transparent and chemically stable, so it can be used as long as it has a higher refractive index than the matting oil. In the embodiment, the matting oil 6 was prevented from flowing into the container 1, but an appropriate amount of 1 [J, t (into the container 1)] was added to the stopper. Also, in the above embodiment, the laser medium 1 is
Although I-I 08 is shown as an example, the refractive index is not limited to this, and the refractive index is 1. What is l-I G 8? Even in the case of a Rayleigh medium with I'cK, 2 to ``1['' nonotalene and 4
l1i adapted to the laser medium by carbon lithium
l) It is easy to adjust to the pine 1 ring delta of 11 碍'.
Any matting oil used for measuring the refractive index of crystals, such as mnaphthalene, 1-licresyl phosphate, etc., can be used as long as it does not change over time. Also, when comparing the 011 group of carbon tetrachloride 4 [Yomizu etc. with b Tsushino, it reacts + to phosphate sword lass! 1) is known to be low and does not cause long-term contact b) It is useful to avoid changing the surface of the J5 glass, but other than carbon tetrachloride, it does not react with glass and has the following properties: Matching, 1-(b) can be used as long as it can dissolve it, and b, which has a high boiling point, is preferable.Especially for Rayleigh media with a low optical refractive index, for example, -[Brereg 1 .!-1-Rudo water J
, or al-1-alyl-based resins can be used in conjunction with pine wood. .

1 Effect of the Invention 1 This invention is configured as shown in L, so that the laser beam is emitted from the surface C of the ray medium YN due to the irregularity I! Therefore, if the reflective surface of the container is held mirror-like and flat 1-1 and supported by -C83, the surface of the Rayleigh medium is held mirror-like and d- j <It is not necessary, and there are no restrictions on the shape. For example, crystals can be used instead of being limited to plate shapes. Moreover, keeping the reflective surface of the container mirror-like is the surface of Sea 11 medium T1. Compared to holding d3 in a mirror-like state, it is easier to
Can be used safely for 1J (Monkey etc.)
Gure! , :The effect is (1 zu b -C.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, and FIG. 2 (31 longitudinal sectional side view). '...
・Side surface, 4... Laser "medium? T, 5, 5'... Support part shrine, (5... Pine 1 ring Δ Ile, 7.11.11'
...inflow]", ε', 12°12' ...outflow IL9,9' ...lamp house, +(1,10'
...Fludge Zl Shinzo, 13...Total reflection mirror,
14..., 1'-anti-0'' Missy Applicant Person Co., Ltd. Ne I Hoya Soryo IIP Person Morning 011] Sachi

Claims (1)

[Claims] 1. A solid sea medium 11 is housed in a container having both end faces formed at Brewster's angle and a side face parallel to the end faces j and 1j being transparent. The slazo-type solid-state laser oscillation device is characterized in that it is filled with a matching mail that matches the refractive index of the solid-state laser medium and the solid-state laser medium. cold)
A slab-type solid-state laser oscillation device according to claim 1, which is used as a cooling medium for JI. 3 Excitation light energy 1 through the transparent side surface! 2. A slab-type solid-state resonator oscillator according to claim 1, in which 1'l Fl is crystallized in said container. 4. The slab-type solid-state IF oscillator according to claim 1, wherein the solid-state laser medium is a glass laser medium. 511a, the matching A-il consists of 2-110-p-phthalene and carbon tetrachloride.
Slab type solid state oscillator device Ff a described in j'4