| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser medium unit capable of more reducing the influence of heating of a laser gain medium, and to provide a laser amplifier and a laser oscillator including the same, and a cooling method.SOLUTION: A laser medium unit 10A according to one embodiment includes a laser medium 16 produced by bonding at least one laser gain medium 22 to a first surface 20a and a second surface 20b of an optical medium 20, and a container for housing the laser medium and having a cooling medium flow path through which a cooling medium C for cooling the laser gain medium flows. The cooling medium flow path has a supply flow path 34 for supplying the cooling medium to an arrangement space 28 of the laser medium, and a discharge flow path 30 for discharging the cooling medium from the arrangement space. A medium outlet 40 of the supply flow path is provided for each laser gain medium, and the medium outlets are arranged so that the cooling medium flows from a high intensity region 44a to a low intensity region 44b of intensity distribution in an irradiation region 44 of exciting light L1 for the laser gain medium. |
