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    • 5. 发明公开
    • Semiconductor laser
    • 半导体激光
    • EP2244342A3
    • 2010-12-22
    • EP10171188.5
    • 2006-08-08
    • Eudyna Devices Inc.
    • Fujii, Takuya
    • H01S5/125H01S5/0625H01S5/06H01S5/026H01S5/042H01S5/10H01S5/12
    • H01S5/12H01S5/0265H01S5/0287H01S5/0425H01S5/0612H01S5/06256H01S5/1057H01S5/106H01S5/1064H01S5/1209H01S5/1212H01S5/1221H01S5/1231H01S5/124H01S5/1246H01S5/125
    • A semiconductor laser comprises a first reflector (3) that has a plurality of segments, each segment having a first area including a diffractive grating (2) and a second area that is a space area, optical lengths of at least two of the second areas of the first reflector (3) being different from each other, and a refractive-index of each of the segments of the first reflector being changeable, and a second reflector (5,7) that has a plurality of segments, each segment having a first area including a diffractive grating (2) and a second area that is a space area, optical lengths of at least two of the second areas of the second reflector (5,7) being different from each other, and a refractive-index of each of the segments of the second reflector being changeable. The respective diffractive gratings (2) of the first areas of the first reflector and the second reflector are equal in pitch to one another.
    • 一种半导体激光器包括具有多个段的第一反射器(3),每个段具有包括衍射光栅(2)的第一区域和作为间隔区域的第二区域,第二区域中的至少两个的光学长度 (3)的折射率是彼此不同的,并且所述第一反射器的每个段的折射率是可变的;以及第二反射器(5,7),其具有多个段,每个段具有 第一区域包括衍射光栅(2)和作为空间区域的第二区域,第二反射器(5,7)的至少两个第二区域的光学长度彼此不同,折射率为 第二反射器的每个分段是可改变的。 第一反射器和第二反射器的第一区域的各个衍射光栅(2)的间距彼此相等。
    • 10. 发明公开
    • Distributed Feedback Semiconductor Laser for Outputting Beam of Single Wavelength
    • DFB - 半导体激光器,用于产生单一波长的光束
    • EP1376789A3
    • 2004-06-02
    • EP03013736.8
    • 2003-06-17
    • ANRITSU CORPORATION
    • Mori, HiroshiKikugawa, TomoyukiTakahashi, YoshioFujita, Motoaki
    • H01S5/12
    • H01S5/12H01S5/0654H01S5/1203H01S5/1225H01S5/1231H01S5/124H01S5/1243
    • A distributed feedback semiconductor laser includes a semiconductor substrate (11), first and second diffraction grating layers (12a, 12b), a connecting layer (13), an active layer (18) and a cladding layer (19). The first and second diffraction grating layers (12a, 12b) are provided above the semiconductor substrate (11), and spaced from each other in an output direction of a beam (23). The connecting layer (13) is flat and sandwiched between the first and second diffraction grating layers (12a, 12b). The active layer (18) is disposed above or below the first and second diffraction grating layers (12a, 12b) and the connecting layer (13). The cladding layer (19) is disposed above the active layer (18) or above the first and second diffraction grating layers (12a, 12b) and the connecting layer (f). A diffraction grating (16) including the first and second diffraction grating layers (12a, 12b) has a plurality of slits (15) penetrating from an upper surface to a lower surface and perpendicular to the output direction of the beam (23). The connecting layer (13) is formed from two layers (13a, 13b) grown epitaxially in a direction perpendicular to the output direction of the beam (23). One (13a) of the two layers is formed of the same material as the first and second diffraction grating layers.
    • 分布式反馈半导体激光器包括:半导体衬底(11),第一和第二衍射光栅层(12A,12B),有源层(18)和包层(19)的连接层(13)。 第一和第二衍射光栅层(12A,12B)在半导体衬底(11)的上方设置,并在梁(23)的输出方向从在彼此间隔开。 连接层(13)是平的并且夹在所述第一和第二衍射光栅层之间(12A,12B)。 有源层(18)之上或在第一和第二衍射光栅层(12A,12B)和连接层(13)下面设置。 该包覆层(19)在有源层(18),第一和第二衍射光栅层(12A,12B)和连接层之上或上方设置(F)。 衍射光栅(16)包括第一和第二衍射光栅层(12A,12B)具有狭缝的多个(15)在从上表面到下表面且垂直于所述光束(23)的输出方向上贯通。 连接层(13)由两个层(13A,13B)外延生长的方向垂直于所述光束(23)的输出方向形成。 所述两个层中的一个(13A)形成在相同的材料作为第一和第二衍射光栅层。