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    • 1. 发明授权
    • Dispersion compensator using Bragg gratings in transmission
    • 色散补偿器在传输中使用布拉格光栅
    • US06501874B1
    • 2002-12-31
    • US09963102
    • 2001-09-25
    • Sergey FrolovJoseph ShmulovichTek-Ming Shen
    • Sergey FrolovJoseph ShmulovichTek-Ming Shen
    • G02B642
    • G02B6/2932G02B6/02085G02B6/124G02B6/278G02B6/29319G02B6/29322G02B6/29329G02B6/29394
    • An apparatus is provided to compensate for dispersion in a transmission medium. The apparatus includes an input port for receiving a WDM optical signal having a plurality of signal wavelengths and a first Bragg transmission grating receiving the WDM optical signal from the input port. The first Bragg transmission grating has non-zero dispersion at at least one of the signal wavelengths. The first Bragg transmission grating also has a Bragg wavelength that is chosen so that all of the plurality of signal wavelengths lie outside of a reflection band of the first Bragg transmission grating. A second Bragg transmission grating, which is optically coupled to the first Bragg transmission grating, has a non-zero dispersion at at least one of the signal wavelengths. The second Bragg transmission grating also has a Bragg wavelength that is selected so that all of the plurality of signal wavelengths lie outside of a reflection band of the second Bragg transmission grating. Finally, an output port is provided for receiving the optical signal from the second Bragg grating and communicating the optical signal to an external source.
    • 提供了一种用于补偿传输介质中的色散的装置。 该装置包括用于接收具有多个信号波长的WDM光信号的输入端口和从输入端口接收WDM光信号的第一布拉格透射光栅。 第一布拉格透射光栅在至少一个信号波长处具有非零色散。 第一布拉格透射光栅还具有布拉格波长,其被选择为使得所有多个信号波长位于第一布拉格透射光栅的反射带的外侧。 光耦合到第一布拉格透射光栅的第二布拉格透射光栅在至少一个信号波长处具有非零色散。 第二布拉格透射光栅还具有选择的布拉格波长,使得所有多个信号波长位于第二布拉格透射光栅的反射带的外侧。 最后,提供输出端口用于从第二布拉格光栅接收光信号并将光信号传送到外部源。
    • 4. 发明授权
    • Kink free operation of pump lasers having diffraction grating for providing wavelength stabilization
    • 具有用于提供波长稳定性的衍射光栅的泵浦激光器的无扭曲操作
    • US06882666B2
    • 2005-04-19
    • US10277999
    • 2002-10-22
    • Rudolf KazarinovSergey FrolovJoseph Shmulovich
    • Rudolf KazarinovSergey FrolovJoseph Shmulovich
    • H01S5/042H01S5/06H01S5/0625H01S5/065H01S5/14H01S3/13
    • H01S5/141H01S5/0425H01S5/0601H01S5/0625H01S5/0658H01S5/146
    • A semiconductor laser source includes a laser diode having front and rear facets. The laser diode includes a substrate and a lower cladding layer disposed on the substrate. The lower cladding layer is doped with a dopant of the first conductivity type. An active layer is disposed on the lower cladding layer and an upper cladding layer is disposed on the active layer. The upper cladding layer is doped with a dopant of the second conductivity type. At least one electrode is disposed on a first outer layer of the diode. A pair of electrodes is disposed on a second outer layer of the diode. The second outer layer is located on a side of the diode opposing the first outer layer. The pair of electrodes is configured to allow application of different currents to each one of the electrodes in the pair of electrodes. A reflector, which is located external to the laser diode, is in optical communication with the front facet of the laser diode for providing optical feedback to the active region.
    • 半导体激光源包括具有前后面的激光二极管。 激光二极管包括基板和设置在基板上的下包层。 下包层掺杂有第一导电类型的掺杂剂。 在下包层上设置有源层,在有源层上设置上包层。 上覆层掺杂有第二导电类型的掺杂剂。 至少一个电极设置在二极管的第一外层上。 一对电极设置在二极管的第二外层上。 第二外层位于与第一外层相对的二极管的一侧。 该对电极被配置为允许对该对电极中的每个电极施加不同的电流。 位于激光二极管外部的反射器与激光二极管的前端面光学通信,用于向激活区域提供光学反馈。