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US 2018/0006423 A1Published application
Laser beam amplification device
AssigneeHamamatsu Photonics K.K.
InventorsTakashi SEKINE, Yoshinori KATO, Yoshinori TAMAOKI, Takashi KURITA, Toshiyuki KAWASHIMA, Takaaki MORITA
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Abstract
A laser medium unit 10 in a laser beam amplification device includes a plurality of laser media 14. A cooling medium flow path F1 is provided around the laser medium unit 10 to cool the laser medium unit 10 from outside. A sealed space between the laser media 14 is filled with gas or liquid, and a laser beam for passing through the sealed space is not interfered by a cooling medium flowing outside. Therefore, a fluctuation of an amplified laser beam is prevented, and a quality such as stability and focusing characteristics of the laser beam is improved.
Claims4
1:
- A laser beam amplification device comprising:
- a laser medium unit;
- an excitation light source configured to cause excitation light to enter the laser medium unit;
- and
- a cooling medium flow path configured to be arranged around the laser medium unit,
- wherein the laser beam amplification device amplifies and outputs a laser beam input to the laser medium unit;
- wherein the laser medium unit comprises:
- a plate-like first laser medium,
- a plate-like second laser medium, and
- a sealing material arranged between the first and the second laser media;
- wherein the first and the second laser media are aligned along a thickness direction of the first and the second laser media;
- and
- wherein a space between the first and the second laser media is a sealed space and is under a reduced pressure environment or is filled with gas.
10 more elements
2:
- The laser beam amplification device according to claim 1, wherein
- materials of the first and the second laser media are ceramic laser media.
3:
- The laser beam amplification device according to claim 1, wherein
- the laser medium unit includes a pair of flanges arranged opposed to each other and
- three or more support columns for connecting the flanges and capable of adjusting a distance between the flanges,
- an alignment direction of the first and the second laser media coincides with a longitudinal direction of the support column, and
- a pressure to be applied to the sealing material is adjustable by adjusting the distance between the flanges.
2 more elements
4:
- A laser beam amplification device comprising:
- a laser medium unit;
- an excitation light source configured to cause excitation light to enter the laser medium unit;
- and
- a cooling medium flow path configured to be arranged around the laser medium unit, wherein
- wherein the laser beam amplification device amplifies and outputs a laser beam input to the laser medium unit;
- wherein the laser medium unit comprises:
- a plate-like first laser medium,
- a plate-like second laser medium, and
- a sealing material arranged between the first and the second laser media;
- wherein the first and the second laser media are aligned in a thickness direction of the first and the second laser media, and
- a space between the first and the second laser media is a sealed space and is filled with heavy water or fluorine-based inert liquid.
9 more elements