DIFFERENTIAL DRIVING OF LITHIUM-CONTAINING ELECTRO-OPTIC DEVICES UTILIZING ENGINEERED ELECTRODES

    公开(公告)号:US20240184149A1

    公开(公告)日:2024-06-06

    申请号:US18532941

    申请日:2023-12-07

    CPC classification number: G02F1/0356 G02F2201/063 G02F2201/122 G02F2202/20

    Abstract: An optical modulator includes optical material(s) and first and second differential electrode pairs. The optical material(s) exhibit an electro-optic effect and include lithium. The optical material(s) include first and second waveguides and first and second slab portions adjoining the first and second waveguides. The first differential electrode pair has electrodes arranged on opposing sides of the first waveguide. The second differential electrode pair has electrodes arranged on opposing sides of the second waveguide. The negative electrodes are arranged on distal sides of the waveguide relative to the other waveguide. The positive electrodes are arranged on proximal sides of waveguide relative to the other waveguide. The first and second waveguides, the first and second slab portions, and the first and second differential electrode pairs reside on a substrate structure. No portion of the first slab portion is between the first or second differential electrode pair and the substrate structure.

    Integrated electro-optic frequency comb generator

    公开(公告)号:US11307484B2

    公开(公告)日:2022-04-19

    申请号:US17016234

    申请日:2020-09-09

    Abstract: An integrated electro-optic frequency comb generator based on ultralow loss integrated, e.g. thin-film lithium niobate, platform, which enables low power consumption comb generation spanning over a wider range of optical frequencies. The comb generator includes an intensity modulator, and at least one phase modulator, which provides a powerful technique to generate a broad high power comb, without using an optical resonator. A compact integrated electro-optic modulator based frequency comb generator, provides the benefits of integrated, e.g. lithium niobate, platform including low waveguide loss, high electro-optic modulation efficiency, small bending radius and flexible microwave design.

    VELOCITY MATCHED ELECTRO-OPTIC DEVICES

    公开(公告)号:US20210311336A1

    公开(公告)日:2021-10-07

    申请号:US16838763

    申请日:2020-04-02

    Abstract: A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.

    Lithium niobate devices fabricated using deep ultraviolet radiation

    公开(公告)号:US11086048B1

    公开(公告)日:2021-08-10

    申请号:US16785206

    申请日:2020-02-07

    Abstract: An optical device is described. At least a portion of the optical device includes lithium niobate and is fabricated utilizing ultraviolet lithography. In some aspects the at least the portion of the optical device is fabricated using deep ultraviolet lithography. In some aspects, the short range root mean square surface roughness of a sidewall of the at least the portion of the optical device is less than ten nanometers. In some aspects, the at least the portion of the optical device has a loss of not more than 2 dB/cm.

    THIN FILM LITHIUM-CONTAINING PHOTONICS WAFER HAVING A TRAP-RICH SUBSTRATE

    公开(公告)号:US20250155739A1

    公开(公告)日:2025-05-15

    申请号:US18942189

    申请日:2024-11-08

    Abstract: A substrate configured for an electro-optic device and an electro-optic device formed using the substrate are described. The substrate includes a semiconductor substrate, an insulating layer, and at least one thin film optical material. The semiconductor substrate includes a trap-rich layer and an underlying substrate layer. The insulating layer is on the semiconductor substrate, The trap-rich layer is between the underlying substrate layer and the insulating layer. The thin film optical material(s) have an electro-optic effect and are on the insulating layer.

    LOW-LOSS WAVEGUIDING STRUCTURES, IN PARTICULAR MODULATORS

    公开(公告)号:US20250013086A1

    公开(公告)日:2025-01-09

    申请号:US18777425

    申请日:2024-07-18

    Abstract: An optical device is described. The optical device includes a waveguide and a modulation driver. The waveguide includes a first region, a second region, and a tapered region between the first and second regions. The first region supports a first set of modes of an optical signal. The second region supports a second set of modes of the optical signal. The first set of modes is different from the second set of modes. The tapered region is between the first region and the second region. The waveguide includes lithium. The modulation driver is configured to provide modulation of the optical signal in the first region.

    High performance optical modulator
    10.
    发明授权

    公开(公告)号:US11940677B1

    公开(公告)日:2024-03-26

    申请号:US17532635

    申请日:2021-11-22

    CPC classification number: G02F1/011

    Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.

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