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    • 3. 发明申请
    • METHODS AND SYSTEMS FOR OPTICAL BEAM STEERING
    • 用于光束转向的方法和系统
    • WO2017223299A1
    • 2017-12-28
    • PCT/US2017/038721
    • 2017-06-22
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • SKIRLO, ScottVERGHESE, SimonHERD, Jeffery ScottJUODAWLKIS, Paul WilliamSOLJACIC, MarinSORACE-AGASKAR, Cheryl MarieYANG, YiENGLUND, Dirk RobertPRABHU, Mihika
    • G02B27/64G09G5/00H01S3/10
    • An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.
    • 集成光束转向装置包括平面介质透镜,该平面介质透镜使来自透镜平面内不同方向的不同输入的光束准直。 它还包括一个输出耦合器,如光栅或光子晶体,将准直光束以不同方向引导出透镜平面。 开关矩阵控制哪个输入端口被照亮,并因此控制准直光束的面内传播方向。 并且可调光源改变波长以控制准直光束离开基板平面的角度。 该器件非常高效,部分原因是输入端口(以及面内传播方向)可以通过仅激活开关矩阵中N个开关的log2 N来改变。 它也可以更简单,更小,更便宜,因为它需要比具有相同分辨率的传统光学相控阵列更少的控制线。
    • 10. 发明申请
    • CONTINUOUS-WAVE ORGANIC DYE LASERS AND METHODS
    • 连续波有机染料激光和方法
    • WO2014074136A1
    • 2014-05-15
    • PCT/US2013/029437
    • 2013-03-06
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • CHUA, Song-LiangSOLJACIC, MarinZHEN, BoLEE, JeongwonSHAPIRA, Ofer
    • H01S3/091
    • H01S3/091H01S3/08H01S3/08031H01S3/092H01S3/0941H01S3/168H01S3/213H01S5/12H01S5/36
    • An organic dye laser produces a continuous-wave (cw) output without any moving parts (e.g., without using flowing dye streams or spinning discs of solid-state dye media to prevent photobleaching) and with a pump beam that is stationary with respect to the organic dye medium. The laser's resonant cavity, organic dye medium, and pump beam are configured to excite a lasing transition over a time scale longer than the associated decay lifetimes in the organic dye medium without photobleaching the organic dye medium. Because the organic dye medium does not photobleach when operating in this manner, it may be pumped continuously so as to emit a cw output beam. In some examples, operation in this manner lowers the lasing threshold (e.g., to only a few Watts per square centimeter), thereby facilitating electrical pumping for cw operation.
    • 有机染料激光器产生没有任何移动部件的连续波(cw)输出(例如,不使用固态染料介质的流动染料流或旋转盘以防止漂白),并且使用相对于 有机染料介质。 激光器的谐振腔,有机染料介质和泵浦光束被配置成比有机染料介质中相关联的衰减寿命长一段时间的激光激发过程,而无需漂白有机染料介质。 因为有机染料介质以这种方式操作时不会漂白,所以可以连续地泵送以发射cw输出光束。 在一些示例中,以这种方式的操作降低了激光阈值(例如,每平方厘米仅为几瓦特),从而便于cw操作的电泵送。