专利名称：Optical functional element and transmission
device
发明人：Junichi Kinoshita申请号：US09295295申请日：19990420公开号：US06330265B1公开日：20011211
专利附图：
摘要：A distributed feedback laser comprising: waveguide () having a hologram ()capable of emitting radiation mode light in upper and lower directions; first reflector ()provided below said waveguide for returning said radiation mode light back to said
waveguide; and second reflector (A, B, C, D, E) provided above said waveguide forreturning said radiation mode light back to said waveguide, intensity profile of saidradiation mode light on said waveguide being non-uniform is disclosed. Also, by using2nd- or higher-order diffraction gratings having an asymmetric cross-sectional
configuration together with a reflection structure located at one side thereof, a highlydirectional optical isolator can be provided. Further, the present invention provides anoptical functional element comprising: first waveguide which guides optical waves and hasa grain or a loss, said waveguide having a hologram () capable of coupling with said opticalwaves guided by said waveguide to generate radiation mode light; amplifier () foramplifying said radiation mode light released from said first waveguide and releasing it;and first reflector () for reflecting said radiation mode light emitted from said amplifierback to said first waveguide.
申请人：KABUSHIKI KAISHA TOSHIBA
代理机构：Hogan & Hartson, L.L.P.
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