Laser device and method for manufacturing laser device

Inventors: Takuto Iguchi (Hamamatsu, JP); Yoshinori Kato (Hamamatsu, JP); Takaaki Morita (Hamamatsu, JP); Kazuki Kawai (Hamamatsu, JP)

Assignee: HAMAMATSU PHOTONICS K.K.

H01S3/025 H01S3/0407 H01S3/042 H01S3/061 H01S3/0941

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Quick Facts

Patent No.: US 12676448
App. No.: 18/022,764
Granted: Jul 7, 2026
Kind: B2

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Abstract

Disclosed is a laser device includes: a rod-shaped laser medium extending in a first direction; a first light source unit including a first base and a plurality of excitation light sources; a second light source unit arranged side by side with the first light source unit in a second direction intersecting with the first direction, the second light source unit including a second base and a plurality of excitation light sources; and a holder supporting the laser medium, the first light source unit, and the second light source unit. At least one of the first base and the holder includes a first regulating part configured to regulate a position of the first base with respect to the holder, and at least one of the second base and the holder includes a second regulating part configured to regulate a position of the second base with respect to the holder.

Claims (40)

1 . A laser device comprising:

a rod-shaped laser medium extending in a first direction;

a first light source unit including a first base and a plurality of excitation light sources attached to the first base;

a second light source unit arranged side by side with the first light source unit in a second direction intersecting with the first direction, the second light source unit including a second base and a plurality of excitation light sources attached to the second base; and

a holder supporting the laser medium, the first light source unit, and the second light source unit,

wherein at least one of the first base and the holder includes a first regulating part configured to regulate a position of the first base with respect to the holder,

wherein at least one of the second base and the holder includes a second regulating part configured to regulate a position of the second base with respect to the holder,

wherein the holder includes a first holding member and a second holding member arranged side by side in the first direction and a connecting member connecting the first holding member and the second holding member to each other,

wherein the first light source unit and the second light source unit are disposed between the first holding member and the second holding member, and

wherein the connecting member has a support surface supporting the first base and the second base slidably in the second direction, the support surface being in contact with the first base and the second base.

2 . The laser device according to claim 1 , wherein the connecting member includes a first stopper configured to restrict movement of the first base in the second direction as the first regulating part, the first stopper being in contact with the first base in the second direction, and includes a second stopper configured to restrict movement of the second base in the second direction as the second regulating part, the second stopper being in contact with the second base in the second direction.

3 . The laser device according to claim 1 ,

wherein the first base includes a first flow path through which a coolant flows,

wherein the second base includes a second flow path through which a coolant flows, and

wherein the holder includes a third flow path through which a coolant flows.

4 . The laser device according to claim 3 , wherein the first flow path, the second flow path, and the third flow path communicate with each other.

5 . The laser device according to claim 4 ,

wherein the holder includes a tubular body in which the laser medium is disposed,

wherein the tubular body has light transmittance,

wherein the third flow path includes a main flow path including a flow path between the laser medium and the tubular body, a first branch flow path and a second branch flow path branching from the main flow path, and a third branch flow path and a fourth branch flow path joining the main flow path,

wherein a downstream end of the first branch flow path is connected to an upstream end of the first flow path,

wherein a downstream end of the second branch flow path is connected to an upstream end of the second flow path,

wherein an upstream end of the third branch flow path is connected to the downstream end of the first flow path, and

wherein an upstream end of the fourth branch flow path is connected to the downstream end of the second flow path.

6 . The laser device according to claim 1 , wherein the plurality of excitation light sources are disposed along a circumference centered on a center line of the laser medium when viewed in the first direction.

7 . The laser device according to claim 1 , wherein each of the plurality of excitation light sources includes a semiconductor laser element.

8 . The laser device according to claim 7 , wherein the semiconductor laser element includes a plurality of stacked semiconductor laser bars.

9 . A laser device comprising:

a rod-shaped laser medium extending in a first direction;

a first light source unit including a first base and a plurality of excitation light sources attached to the first base;

a holder supporting the laser medium, the first light source unit, and the second light source unit,

wherein at least one of the first base and the holder includes a first regulating part configured to regulate a position of the first base with respect to the holder,

wherein at least one of the first base and the second base includes a second regulating part configured to regulate a position of the second base with respect to the first base,

wherein the first light source unit and the second light source unit are disposed between the first holding member and the second holding member, and

10 . A method for manufacturing a laser device, comprising:

a step of preparing a first light source unit including a first base and a plurality of excitation light sources attached to the first base, a second light source unit including a second base and a plurality of excitation light sources attached to the second base, and a holder supporting a rod-shaped laser medium extending in a first direction, the holder including a first holding member and a second holding member arranged side by side in the first direction and a connecting member connecting the first holding member and the second holding member to each other; and

a step of sliding the first base on support surface of the connecting member from one side in a second direction intersecting with the first direction so as to dispose the first light source unit between the first holding member and the second holding member, and sliding the second base on the support surface from the other side in the second direction so as to dispose the second light source unit between the first holding member and the second holding member, and thereby arranging the first light source unit and the second light source unit side by side in the second direction.