Optical waveguide and a method for providing an optical waveguide
    1.
    发明授权
    Optical waveguide and a method for providing an optical waveguide 失效
    光波导和提供光波导的方法

    公开(公告)号:US06978057B1

    公开(公告)日:2005-12-20

    申请号:US10088758

    申请日:2000-09-25

    摘要: A laser diode (1) having an optical path (15) defined in an active layer (2) which is sandwiched between a substrate layer (3) and a top layer (4) and defined by a ridge (14) formed in the top layer (4) outputs laser light of a single predetermined wavelength. Refractive index altering grooves (21) extending transversely in the top layer (4) are provided at spaced apart locations for altering the refractive index of the active layer (2) along the optical path at partial reflecting locations (20) for causing partial longitudinal reflections of the laser light generated in the optical path (15) so that standing waves or harmonics thereof of the single predetermined wavelength are set up between the respective partial reflecting locations (20) and a first mirror facet (8) in the optical path (15). In order that the standing waves set up between the partial reflecting locations (20) and the first mirror facet (8) are harmonics of the predetermined single wavelength, the refractive index altering grooves (21) are located along the ridge (14) for forming the reflecting locations (20) at distances from the first mirror facet (8) which correspond to the effective length of the optical path (15) resulting from the affect of the inclusion of the reflecting locations (20) rather than at locations corresponding to the actual length of the light path (15).

    摘要翻译: 一种激光二极管(1),其具有限定在有源层(2)中的光路(15),该有源层(2)夹在基板层(3)和顶层(4)之间,并由形成在顶部 层(4)输出单个预定波长的激光。 在间隔开的位置处提供横向延伸在顶层(4)中的折射率改变槽(21),用于在部分反射位置(20)处沿着光路改变有源层(2)的折射率,以使局部纵向反射 在所述光路(15)中产生的激光的每个部分反射位置(20)和所述光路(15)中的第一镜面(8)之间建立其单个预定波长的驻波或谐波 )。 为了在部分反射位置(20)和第一镜面(8)之间建立的驻波是预定单波长的谐波,折射率改变槽(21)沿着脊(14)定位成形 距离第一镜面(8)的距离对应于由包含反射位置(20)的影响而导致的光路(15)的有效长度的反射位置(20),而不是对应于 光路的实际长度(15)。

    Laser diode
    2.
    发明授权
    Laser diode 失效
    激光二极管

    公开(公告)号:US06940883B2

    公开(公告)日:2005-09-06

    申请号:US10240390

    申请日:2001-03-28

    摘要: A laser diode (1) for outputting light of a single mode comprises a substrate layer (5), a cladding layer (6) and a compound light propagating layer (7) comprising first, second, third and fourth layers (9 to 12). A wave guiding region (15) of refractive index lower than its adjacent regions is defined by the third layer (11) by two quantum wells (16) positioned at the anti-node of light of a single mode which is propagating in the third layer (11) for propagating and amplifying the single mode light. A central ridge (17) locates the wave guiding region transversely of the direction of light propagation. The wave guiding region (15) can also be defined by shaping the top cladding layer (6) by forming an elongated central channel through the central ridge (17).

    摘要翻译: 用于输出单模光的激光二极管(1)包括基片层(5),包覆层(6)和复合光传播层(7),其包括第一,第二,第三和第四层(9至12) 。 由第三层(11)由位于第三层中传播的单模光的反节点的两个量子阱(16)限定折射率低于其相邻区域的波导区域(15) (11),用于传播和放大单模光。 中心脊(17)将波导区域横向于光传播方向定位。 波导区域(15)也可以通过通过中心脊(17)形成细长的中心通道来形成顶部包层(6)来限定。