JP2518445Y2 - Optical resonator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical resonator applied to a Raman laser device.

[0002]

2. Description of the Related Art A conventional optical resonator is shown in FIGS.
This will be described below. In FIG. 4, reference numerals 2A and 2B denote a pair of concave mirrors. Laser light is made incident through the incident hole 12 of the concave mirror 2A, and laser light is repeatedly reflected as shown in FIG. It goes out. Spots as shown in FIG. 6 are arranged on the mirror surfaces of the concave mirrors 2A and 2B, and the concave mirror angle adjusters 7A, 8A, 7B and 8B are adjusted so that the spots are arranged on the circle at equal intervals. At this time, it was confirmed whether or not the spots were lined up on the circle from the observation windows 9A and 9B at equal intervals, but there was no clear index for indexing the position of the spot.

[0003]

In the conventional optical resonator, there is no index for indexing the spot position generated on the concave mirror, and the spot is relied on visually at the position of the entrance or exit hole or the edge of the concave mirror. There is no choice but to judge whether or not the circles are lined up on a circle, and it is not easy to find a proper spot position, and it is difficult to judge whether or not the angle adjustment of the concave mirror is proper.

The present invention is intended to solve the above problems.

[0005]

In the optical resonator of the present invention, a pair of opposed concave mirrors are rotatably mounted in a hermetically sealed container about two axes orthogonal to each other, and a laser is provided from an entrance hole provided in one concave mirror. After entering the light and reflecting it repeatedly between the concave mirrors,
In an optical resonator that emits light from an emission hole provided in the other concave mirror, a plurality of holes arranged at equal intervals on the outer peripheral portion of each concave mirror, and one end inserted from the back surface of the concave mirror into each hole. A plurality of optical fibers, and an illumination light source connected to the other ends of the respective optical fibers and provided outside the container to form a laser beam spot on a concave mirror surface via the optical fibers are featured.

[0006]

In the above, when light is emitted from the illumination light source,
Light is transmitted by each optical fiber and emitted from one end of the optical fiber to form a plurality of laser light spots on the surfaces of the concave mirrors facing each other. The laser beam spot formed on the concave mirror surface forms circles arranged at equal intervals on the concave mirror surface when the concave mirror is properly adjusted, but when the adjustment is insufficient, a distorted array and Become.

As described above, when the angle adjustment of the concave mirror is not proper, the spot arrangement on the concave mirror surface is distorted, so that it is easy to determine the suitability of the angle adjustment and the angle adjustment of the concave mirror is facilitated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIG. In the embodiment shown in FIG. 1, the container 1 is provided in the container 1 so as to face each other, has an entrance hole 12 and an exit hole 13, and the angles thereof are adjusted by concave mirror angle adjusters 7A, 8A and 7B, 8B, respectively. Concave mirrors 2A and 2B, and observation windows 9A and 9B, the infrared laser light is reflected between the concave mirrors 2A and 2B to convert its wavelength. In the Raman laser device, the concave mirrors 2A and 2B are equidistantly spaced from each other. A plurality of optical fibers 3A, 3B each having one end inserted in a hole arranged in
And an illumination light source 5A to which optical fiber bundles 4A and 4B formed by the optical fibers 3A and 3B are connected, respectively.
It is equipped with 5B.

In the above, the illumination light emitted from the illumination light sources 5A and 5B is introduced through the optical fiber bundles 4A and 4B, and as shown in FIGS. 2 (a) and 3 (a), the concave mirror 2A, Repeatedly reflected by the surface 2B, the concave mirror 2A,
2B, FIG. 2C, and FIG. 3B,
A spot is formed as shown in (c). FIG. 2 shows the concave mirrors 2A and 2B adjusted to a normal angle,
FIG. 3 shows a case where the angle adjustment of the concave mirrors 2A and 2B is insufficient. By determining whether the spots on the concave mirrors 2A and 2B are lined up on a circle or at equal intervals, It is possible to easily judge whether or not the concave mirrors 2A and 2B are sufficiently adjusted in angle.

According to the above, when the angle adjustment of the concave mirror is not proper, the spot arrangement on the concave mirror surface is distorted, so that it is easy to determine the appropriateness of the angle adjustment, and the angle adjustment of the concave mirror is facilitated.

[0011]

The optical resonator of the present invention irradiates a laser beam from one end of an optical fiber provided on the outer periphery of a concave mirror, and a plurality of laser light spots formed on the concave mirror surface are arranged in a circle at equal intervals. If the angle adjustment of the concave mirror is not appropriate by determining whether or not it is, the spot alignment on the concave mirror surface is rejected, so it is easy to determine whether the angle adjustment is appropriate or not, and it is easier to adjust the angle of the concave mirror. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

2A and 2B are explanatory views in the case where the angle adjustment of the concave mirror according to the one embodiment is appropriate, FIG. 2A is an explanatory view of a reflection state of laser light, and FIG. 2B is a laser formed on the concave mirror surface on the incident side. FIG. 3C is an explanatory diagram of a light spot, and FIG. 7C is an explanatory diagram of a laser light spot formed on a concave mirror surface on the emitting side.

3A and 3B are explanatory diagrams when the angle adjustment of the concave mirror according to the one embodiment is improper, FIG. 3A is an explanatory diagram of a reflection state of laser light, and FIG. 3B is formed on a concave mirror surface on the incident side. FIG. 3C is an explanatory view of a laser light spot, and FIG. 3C is an explanatory view of a laser light spot formed on the concave mirror surface on the emitting side.

FIG. 4 is an explanatory diagram of a conventional device.

FIG. 5 is an explanatory diagram of a reflection state of laser light according to a conventional device.

6A and 6B are explanatory views of a laser beam spot according to a conventional apparatus, in which FIG. 6A is an incident side and FIG. 6B is an emission side.

[Explanation of symbols]

 1 Container 2A, 2B Concave Mirror 3A, 3B Optical Fiber 4A, 4B Optical Fiber Bundle 5A, 5B Illumination Light Source 7A, 7B Horizontal Axis Angle Adjuster 8A, 8B Concave Mirror Vertical Axis Angle Adjuster 9A, 9B Observation Window 12 Entrance hole 13 Exit hole

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of concave mirrors facing each other in a closed container are rotatably mounted around two axes orthogonal to each other, and laser light is made incident through an entrance hole provided in one concave mirror and repeatedly reflected between the concave mirrors. After that, in the optical resonator that emits light from the emission hole provided in the other concave mirror, a plurality of holes arranged at equal intervals on the outer peripheral portion of each concave mirror, and one end inserted from the back surface of the concave mirror into each hole A plurality of optical fibers, and an illumination light source that is connected to the other end of each optical fiber and is provided outside the container to form a laser light spot on the concave mirror surface via the optical fiber. Optical resonator to do.