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    • 9. 发明公开
    • Tunable laser and photoacoustic device including the same
    • 激光雕刻机和激光雕刻机
    • EP2752948A2
    • 2014-07-09
    • EP14150029.8
    • 2014-01-02
    • Canon Kabushiki Kaisha
    • Iwase, Hideo
    • H01S3/137
    • H01S3/1062A61B5/0095H01S3/08027H01S3/08036H01S3/137H01S3/1623H01S3/1635
    • A tunable laser includes a resonator including a highly reflecting mirror (104) and a partially reflecting mirror (105); a gain medium (109) disposed in the resonator; a birefringence filter (101) disposed in the resonator; and an excitation device (110) that excites the gain medium (109). In the tunable laser, light that passes through the birefringence filter (101) oscillates between the highly reflecting mirror (104) and the partially reflecting mirror (105). An oscillation wavelength is switched by rotating the birefringence filter (101). The birefringence filter (101) includes a first birefringent plate (1021) and a second birefringent plate (1022), which have principal dielectric axes parallel to optical surfaces thereof. An absolute value of an angle formed by the principal dielectric axis of the first birefringent plate (1021) and the principal dielectric axis of the second birefringent plate (1022) is larger than zero.
    • 可调激光器包括包括高反射镜(104)和部分反射镜(105)的谐振器; 设置在所述谐振器中的增益介质(109) 设置在谐振器中的双折射滤波器(101) 以及激励所述增益介质(109)的激励装置(110)。 在可调激光器中,穿过双折射滤光器(101)的光在高反射镜(104)和部分反射镜(105)之间振荡。 通过旋转双折射滤光器(101)来切换振荡波长。 双折射滤光器(101)包括具有平行于其光学表面的主介电轴的第一双折射板(1021)和第二双折射板(1022)。 由第一双折射板(1021)的主介质轴与第二双折射板(1022)的主介质轴形成的角度的绝对值大于零。