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    • 3. 发明申请
    • Multimode external cavity semiconductor lasers
    • 多模外腔半导体激光器
    • US20060002443A1
    • 2006-01-05
    • US10883423
    • 2004-06-30
    • Gennady FarberHai-Feng Liu
    • Gennady FarberHai-Feng Liu
    • H01S5/00H01S3/08H01S3/10
    • H01S5/141H01S5/02248H01S5/028H01S5/101H01S5/4062
    • External cavity laser devices provide multimode laser operation by using a wavelength selective element that produces a spectral width profile able to support multiple longitudinal laser modes. The spectral width profile, for example, may have a substantially flat response across multiple longitudinal laser modes, such that no single mode predominates. The wavelength selective elements may be gratings written in waveguides, where the grating's bandwidth as well as the laser cavity length set the number of supported longitudinal laser modes. In some examples, a tuning element may be used to adjust device operation. In further examples, a laser gain region and the wavelength selective element may be angled with respect to adjacent coupling facets to reduce reflection losses within the laser cavity.
    • 外腔激光器件通过使用产生能够支持多个纵向激光​​模式的光谱宽度分布的波长选择元件提供多模激光器操作。 例如,光谱宽度分布可以具有跨多个纵向激光​​模式的基本上平坦的响应,使得没有单一模式占优势。 波长选择元件可以是写在波导中的光栅,其中光栅的带宽以及激光腔长度设置支持的纵向激光模式的数量。 在一些示例中,可以使用调谐元件来调整设备操作。 在另外的示例中,激光增益区域和波长选择元件可以相对于相邻的耦合面成一角度,以减少激光腔内的反射损耗。