Absorption cavity with entrance and exit waveguides for a chemical or biological sensor

    公开(公告)号:US11002664B2

    公开(公告)日:2021-05-11

    申请号:US16322254

    申请日:2017-08-03

    摘要: An optical device for a biological or chemical sensor includes: an absorption cavity configured to receive a biological or chemical medium; an injection waveguide to inject an analysis light beam into the absorption cavity; and an extraction waveguide to extract a measurement light beam, corresponding to the analysis light beam after transit through the absorption cavity. The absorption cavity has a shape of a right cylinder with an elliptical base. One end of the injection waveguide is placed at a first focus of the ellipse and one and of the extraction waveguide is placed at a second focus of the ellipse. A core of the injection waveguide and a core of the extraction waveguide each have a tip-shaped end, with a constant height in a plane parallel to the generatrix of the right cylinder and a tip-shaped cross section in planes parallel to the base of the right cylinder.

    Photodiode with improved power absorption

    公开(公告)号:US10950739B2

    公开(公告)日:2021-03-16

    申请号:US15952683

    申请日:2018-04-13

    摘要: A photodiode which includes a core of a first waveguide that terminates in a tapered termination that extends above a core, made of germanium or of SiGe, of a second waveguide, a matching strip that extends opposite the tapered termination on one side and opposite the core of the second waveguide on the opposite side, this matching strip being coupled optically to the core of the second waveguide by an evanescent coupling and including a first zone inside which its effective propagation index is equal to the effective propagation index of a second zone of the tapered termination, these first and second zones optically coupling the tapered termination to the matching strip through a modal coupling, and a low-index layer that extends between the matching strip and the tapered termination.

    Optical phase modulator with sinusoidal PN junction

    公开(公告)号:US10409094B2

    公开(公告)日:2019-09-10

    申请号:US16031572

    申请日:2018-07-10

    IPC分类号: G02F1/025 G02F1/017 G02F1/225

    摘要: The object of the invention is a phase modulator including a modulation guide intended to guide die propagation of a light flow, said guide comprising a PN junction extending mainly along the main axis of propagation according to an oscillating continuous function. Advantageously, the oscillating continuous function is defined in such a way that the PN junction covers at least 50% of the light flow between the input and the output of the modulation guide. According to one possibility, the continuous function is sinusoidal. The object of the invention is also a switch and an intensity modulator each comprising a phase modulator.

    Infrared detector made up of suspended bolometric micro-plates
    9.
    发明授权
    Infrared detector made up of suspended bolometric micro-plates 有权
    红外探测器由悬浮式空调微型板组成

    公开(公告)号:US09401377B2

    公开(公告)日:2016-07-26

    申请号:US14354750

    申请日:2012-11-23

    摘要: An array bolometric detector for detecting an electromagnetic radiation in a predetermined infrared or terahertz wavelength range, including a substrate, and an array of bolometric microplates for the detection of the radiation, suspended above the substrate by support elements. The detector includes a membrane arranged above each microplate, and having patterns having a refractive index smaller than that of the membrane formed therein. The patterns are placed periodically along at least one axis of the membrane, according to a period shorter than or equal to λ n , where λ is a wavelength to be detected and n is the average refractive index of the medium separating the microplate from the membrane. The width of the patterns along the axis increases from a central location of the membrane towards the periphery thereof.

    摘要翻译: 一种用于检测预定的红外线或太赫兹波长范围内的电磁辐射的阵列辐射检测器,包括基底,以及通过支撑元件悬挂在基底上方的用于检测辐射的测温微阵列阵列。 检测器包括布置在每个微板上方的膜,并且具有折射率小于其中形成的膜的折射率的图案。 根据小于或等于λn的周期,沿着膜的至少一个轴周期性地排列图案,其中λ是待检测的波长,n是将微孔板与膜分离的介质的平均折射率 。 沿着轴的图案的宽度从膜的中心位置朝向其周边增加。