Wavelength converting element
    105.
    发明公开
    Wavelength converting element 失效
    Wellelängenwandlervorrichtung。

    公开(公告)号:EP0558801A1

    公开(公告)日:1993-09-08

    申请号:EP92117915.6

    申请日:1992-10-20

    CPC classification number: G02F1/3775 G02F2001/3546 G02F2201/06 G02F2202/20

    Abstract: An optical waveguide (2) formed on one major surface of a substrate (1) made of a non-linear optical crystal. A periodic polarization inversion region (3) where each polarization inverts periodically along the waveguiding direction is formed in the optical waveguide. In the polarization inversion region, the inversion period of the polarization is made shorter gradually toward the light-emitting end (2b) of the optical waveguide from the light-incident end (2a) thereof. A pair of electrodes (5,6) facing each other via the optical waveguide are formed. A voltage is applied to the optical waveguide in the direction perpendicular to the waveguiding direction by those electrodes. An electric field produced in the optical waveguide by the applied voltage induces an electrooptical effect which allows the individual refractive indices of the fundamental wave and second harmonic to be changed. The allowable fundamental wavelength band can be shifted to the short wavelength side or long wavelength side of the fundamental wavelength in accordance with the level of the applied voltage.

    Abstract translation: 形成在由非线性光学晶体制成的基板(1)的一个主表面上的光波导(2)。 在光波导中形成周期性偏振反转区域(3),其中每个偏振波沿着波导方向周期性反转。 在极化反转区域中,从光入射端(2a)朝向光波导的发光端(2b)逐渐缩短偏振的反转周期。 形成经由光波导面对的一对电极(5,6)。 通过这些电极在垂直于波导方向的方向上向光波导施加电压。 通过施加的电压在光波导中产生的电场引起电光效应,其允许改变基波和二次谐波的各个折射率。 可以根据施加电压的电平将允许的基波长带移动到基波长的短波长侧或长波长侧。

    Planar optical element
    106.
    发明公开
    Planar optical element 失效
    Planares优化元素。

    公开(公告)号:EP0522637A2

    公开(公告)日:1993-01-13

    申请号:EP92201994.8

    申请日:1992-07-02

    CPC classification number: G02B6/122 G02F1/065 G02F1/377 G02F2201/06

    Abstract: The invention relates to a planar optical element comprising a light-conducting layer 10 on a supporting material 11 having a refractive index which is lower than that of the light-conducting layer, which light-conducting layer comprises one or more waveguide channels 13. The waveguide channels are laterally delimited by metal layers 14,15 which extend on either side of each waveguide channel, which metal layers are located between the supporting material and the light-conducting layer and directly contact said light-conducting layer. Preferably, the metal layers are provided in the form of electrodes, such that an electric field can be applied transversely across one or more waveguide channels. Such a planar optical element can be used, for example, as an optical switch and in a device for doubling the frequency of a lightwave.

    Abstract translation: 本发明涉及一种平面光学元件,该平面光学元件包括在导光层的折射率低于支撑材料11的光导层10,该光导层包括一个或多个波导通道13。 波导通道由金属层14,15横向限定,金属层14,15在每个波导通道的任一侧延伸,金属层位于支撑材料和导光层之间并直接接触所述光导层。 优选地,金属层以电极的形式提供,使得电场可横向跨越一个或多个波导通道施加。 这样的平面光学元件可以用作例如光开关和将光波频率加倍的装置。

    Undercut Thermo-Optic Phase Shifter
    107.
    发明公开

    公开(公告)号:US20240295760A1

    公开(公告)日:2024-09-05

    申请号:US18661110

    申请日:2024-05-10

    Abstract: A thermo-optic phase shifter includes a substrate having a cavity formed into an upper region of the substrate. The thermo-optic phase shifter includes an optical waveguide disposed above the substrate. The optical waveguide extends across and above the cavity. The thermo-optic phase shifter also includes a heater device disposed along a lateral side of the optical waveguide. The heater device extends across and above the cavity. The cavity is formed by an undercut etching process after the optical waveguide and the heater device is formed. The optical waveguide can be formed to include one or more segments that pass over the cavity. Also, a second heater device can be included such that the one or more segments of the optical waveguide that extend over the cavity are bracketed by heater devices. Thermal transmission structures can be included to enhance heat transfer between the heater device(s) and the optical waveguide.

    Undercut thermo-optic phase shifter
    108.
    发明授权

    公开(公告)号:US11982887B2

    公开(公告)日:2024-05-14

    申请号:US17070891

    申请日:2020-10-14

    Abstract: A thermo-optic phase shifter includes a substrate having a cavity formed into an upper region of the substrate. The thermo-optic phase shifter includes an optical waveguide disposed above the substrate. The optical waveguide extends across and above the cavity. The thermo-optic phase shifter also includes a heater device disposed along a lateral side of the optical waveguide. The heater device extends across and above the cavity. The cavity is formed by an undercut etching process after the optical waveguide and the heater device is formed. The optical waveguide can be formed to include one or more segments that pass over the cavity. Also, a second heater device can be included such that the one or more segments of the optical waveguide that extend over the cavity are bracketed by heater devices. Thermal transmission structures can be included to enhance heat transfer between the heater device(s) and the optical waveguide.

    COMPACT, ENERGY EFFICIENT MACH-ZEHNDER INTERFEROMETERS AND OPTICAL ATTENUATORS

    公开(公告)号:US20190235285A1

    公开(公告)日:2019-08-01

    申请号:US16380234

    申请日:2019-04-10

    Abstract: Mach-Zehnder interferometers comprise heater elements configured to have projections in the plane of optical waveguides positioned such that two adjacent sections of one optical waveguide arms are heated by a common heater element. The heater and at least a substantial section of the heated waveguide segments can be curved. Configurations of an optical waveguide arm can comprise an outer curved heated section, an inner curved heated section, and a loopback waveguide section connecting the outer curved heated section and the inner curved heated section, with average radius of curvature selected to form an open accessible space. Appropriate configurations of the two optical waveguide arms provide for nested configurations of the arms that provide for a compact structure for the interferometer.

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