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    • 3. 发明申请
    • Method of preparation of biomagnetic nanoparticles coated with a noble metal layer
    • 用贵金属层涂覆的生物磁纳米颗粒的制备方法
    • US20060140868A1
    • 2006-06-29
    • US11156740
    • 2005-06-20
    • Stephanie GrancharovStephen O'BrienGlenn HeldChristopher Murray
    • Stephanie GrancharovStephen O'BrienGlenn HeldChristopher Murray
    • A61K49/06A61K9/28
    • B82Y5/00A61K9/0009A61K49/183H01F1/0054
    • A method for the preparation of magnetic nanoparticles coated with a noble metal is described. The method includes providing a first mixture containing a first non-polar organic solvent and uncoated magnetic nanoparticles. The first mixture is mixed with a second mixture containing a second non-polar organic solvent and ions comprising the noble metal to form a third mixture. The third mixture is mixed with an organic ligand or a fourth mixture containing an organic ligand to form a fifth mixture. The fifth mixture is reacted with a sixth mixture containing a reducing agent to form a seventh mixture containing the monodispersed magnetic nanoparticles coated with the noble metal. The monodispersed magnetic coated nanoparticles may be separated from the seventh mixture by adding a polar organic solvent or a mixture of polar organic solvents in which the nanoparticles are insoluble.
    • 描述了制备用贵金属涂覆的磁性纳米颗粒的方法。 该方法包括提供含有第一非极性有机溶剂和未涂覆的磁性纳米颗粒的第一混合物。 将第一混合物与含有第二非极性有机溶剂的第二混合物和包含贵金属的离子混合以形成第三混合物。 将第三混合物与有机配体或含有机配体的第四混合物混合以形成第五混合物。 将第五混合物与含有还原剂的第六混合物反应,形成包含用贵金属涂覆的单分散磁性纳米颗粒的第七混合物。 可以通过加入极性有机溶剂或其中纳米颗粒不溶的极性有机溶剂的混合物将单分散磁性涂覆的纳米颗粒与第七混合物分离。
    • 4. 发明授权
    • Fiber grating-stabilized, semiconductor pump source
    • 光纤光栅稳定,半导体泵浦源
    • US06525872B1
    • 2003-02-25
    • US09375687
    • 1999-08-17
    • Mehrdad ZiariStephen O'BrienMats HagbergRobert J. LangEdward Vail
    • Mehrdad ZiariStephen O'BrienMats HagbergRobert J. LangEdward Vail
    • H01S300
    • H01S5/1064H01S3/06754H01S3/0941H01S3/302H01S5/065H01S5/0656H01S5/146H01S5/4087
    • High power semiconductor lasers for pumping fiber devices, such as fiber amplifiers and fiber lasers, include an optical gain region disposed between a rear end and the output end, the width of the optical gain region being greater at the output end than at the rear end. The optical gain region may include a single mode channel region coupled to a flared amplifier region. The light output from the laser is coupled via a lens system into a fiber for propagating to the fiber device to be pumped. Light is fedback into the laser, for example from a fiber Bragg grating, to induce the laser to operate in coherence collapse. The broad bandwidth output associated with coherence collapse permits the laser to deliver high optical powers into the fiber without the onset of stimulated Billion scattering. Fiber grating feedback improves the quality of the beam output by the laser, thus enhancing coupling efficiency into the fiber. The pump laser may be used to pump multiple fiber devices. Multiple pump lasers may be combined together.
    • 用于泵浦光纤器件(例如光纤放大器和光纤激光器)的大功率半导体激光器包括设置在后端和输出端之间的光学增益区域,光学增益区域的宽度在输出端比在后端更大 。 光增益区域可以包括耦合到扩口放大器区域的单模信道区域。 来自激光器的光输出通过透镜系统耦合到光纤中,以传播到待泵浦的光纤装置。 光反射到激光器中,例如从光纤布拉格光栅反射,以诱导激光器在相干性崩溃中操作。 与相干塌陷相关的宽带宽输出允许激光器将高光功率传递到光纤中,而不会发生刺激的亿亿分散。 光纤光栅反馈提高了激光束的光束输出质量,从而提高光纤耦合效率。 泵浦激光器可用于泵送多个光纤装置。 多个泵浦激光器可以组合在一起。
    • 7. 发明授权
    • Semiconductor ring and folded cavity lasers
    • 半导体环和折叠腔激光器
    • US5231642A
    • 1993-07-27
    • US880681
    • 1992-05-08
    • Donald R. ScifresKenneth M. DzurkoRobert G. WaartsDavid F. WelchAmos HardyStephen O'Brien
    • Donald R. ScifresKenneth M. DzurkoRobert G. WaartsDavid F. WelchAmos HardyStephen O'Brien
    • H01S5/026H01S5/028H01S5/10H01S5/125H01S5/187H01S5/20H01S5/40H01S5/42H01S5/50
    • H01S5/1032H01S5/1071H01S5/20H01S5/423H01S5/026H01S5/028H01S5/1243H01S5/125H01S5/187H01S5/2036H01S5/4075H01S5/42H01S5/50
    • A semiconductor laser that includes at least one grating reflector with a grating period selected to diffract at a nonperpendicular angle within the plane of the laser waveguide. This allows dispersal of laser light, eliminating filamentary multimode operation of broad area lasers. In one embodiment, the grating reflector couples light between a single transverse mode waveguide portion of the optical cavity and a second, broad area, portion that is not collinear with the single mode waveguide. In another embodiment, the cavity favors a ring mode of oscillation. One or more grating reflectors form part of the feedback mechanism which forms a resonant optical cavity with noncollinear portions. Other reflectors in the feedback mechanism include facet reflectors which can be cleaved or ion milled, or semiconductor material refractive index boundaries. Laser embodiments with two or more grating reflectors can be independently tuned to provide a high rate of amplitude modulation. Spatial beam deflection and wavelength tuning are also achieved. A stable unidirectional ring laser is also described. Multiple ring laser cavities can also be coupled together by partially reflecting grating reflectors to form a laser array.
    • 一种半导体激光器,其包括至少一个具有光栅周期的光栅反射器,所述光栅反射器被选择为在激光波导的平面内以非垂直角衍射。 这允许分散激光,消除广域激光器的丝状多模操作。 在一个实施例中,光栅反射器将光耦合在光腔的单个横模式波导部分与不与单模波导共线的第二宽区域部分之间耦合。 在另一个实施例中,空腔有利于环形振荡模式。 一个或多个光栅反射器形成反馈机构的一部分,其形成具有非共线部分的谐振光腔。 反馈机构中的其他反射器包括可以被切割或离子研磨的面反射器,或半导体材料的折射率边界。 具有两个或更多个光栅反射器的激光器实施例可以被独立地调谐以提供高的幅度调制率。 还实现了空间光束偏转和波长调谐。 还描述了稳定的单向环形激光器。 多环激光腔也可以通过部分反射光栅反射器耦合在一起形成激光阵列。