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    • 8. 发明授权
    • Wavelength tunable laser
    • 波长可调激光器
    • US08311071B2
    • 2012-11-13
    • US12767319
    • 2010-04-26
    • Takashi Kato
    • Takashi Kato
    • H01S5/00
    • H01S5/06256H01S5/06258H01S5/0687H01S5/1209
    • A wavelength tunable laser includes a DFB portion including a first optical waveguide provided with a first grating; a DBR portion including a second optical waveguide that is optically coupled to the first optical waveguide and is provided with a plurality of second gratings continuously arranged in a waveguide direction; and a phase shift portion including a third optical waveguide that is optically coupled to the first and second optical waveguides. Each of the second gratings has a grating formation area in which a grating is formed, and a grating phase shift area which shifts the phase of the grating adjacent thereto in the second grating.
    • 波长可调激光器包括DFB部分,其包括设置有第一光栅的第一光波导; DBR部分,包括光学耦合到第一光波导的第二光波导,并且设置有沿波导方向连续布置的多个第二光栅; 以及包括光学耦合到第一和第二光波导的第三光波导的相移部分。 每个第二光栅具有其中形成光栅的光栅形成区域和在第二光栅中使与其相邻的光栅的相位偏移的光栅相移区域。