Abstract: An electro-optic modulator is provided, including: a light splitting element; a light combining element; a first waveguide arm and a second waveguide arm that are arranged in parallel and are connected between the light splitting element and the light combining element; and a first ground electrode, a first signal electrode, a second ground electrode, a second signal electrode, and a third ground electrode that are arranged in sequence, where the first waveguide arm is located between the first ground electrode and the first signal electrode, the second waveguide arm is located between the second ground electrode and the second signal electrode, and the first signal electrode and the second signal electrode are configured to receive differential signals. A technical solution of an embodiment of the present disclosure can improve working performance of the electro-optic modulator.

Abstract: A lithium niobate waveguide having weak phase drift includes a lithium niobate layer, a metal electrode, and a substrate layer. The lithium niobate layer includes a lithium niobate central ridge and lithium niobate extension surfaces extending towards two sides of the lithium niobate central ridge. A metal oxide layer is arranged on the upper surface of the lithium niobate central ridge. The substrate layer is located on the lower surface of the lithium niobate layer and is made of silicon, silicon dioxide, a multilayer material made of silicon and silicon dioxide or a multilayer material made of silicon dioxide, metal, and silicon, so as to further realize the purpose of inhibiting phase drift. Compared with other doped structures or other structures, the structure is simple in manufacturing method, and moreover, a very good phase drift suppression effect is achieved.

Abstract: Provided are a spot-size converter structure and a photonic device. The spot-size converter structure comprises: a first end face configured to be coupled to an integrated optical waveguide, and a second end face parallel to the first end face configured to be coupled to an optical fiber and. The spot-size converter structure comprises: a substrate; an isolation layer located on one side of the substrate; a waveguide layer located on one side of the isolation layer away from the substrate; and a covering layer located on one side of the waveguide layer away from the substrate and covering the waveguide layer.

Abstract: Provided are an electro-optic modulator and an electro-optic device. The electro-optic modulator includes: a substrate; an isolation layer located on the substrate; a thin film layer, used to form a first optical waveguide and a second optical waveguide, an arrangement of the first optical waveguide and the second optical waveguide causing the thin film layer to include a first edge region, a first optical waveguide, an intermediate region, a second optical waveguide, and a second edge region; and an electrode, comprising including a first ground electrode, a signal electrode and a second ground electrode which are sequentially arranged at intervals. The first ground electrode at least includes a first main electrode, the second ground electrode at least includes a second main electrode, and the signal electrode at least includes a third main electrode.

Abstract: An electro-optic modulator and an electro-optic device are provided. The electro-optic modulator includes: a first optical waveguide, a second optical waveguide, and a traveling wave electrode, where the traveling wave electrode includes a first grounding electrode, a first signal electrode, a second signal electrode, and a second grounding electrode that are spaced apart from each other; and the first optical waveguide and the second optical waveguide are both arranged between the first signal electrode and the second signal electrode. The electro-optic modulator has a plurality of extension sections along a extension direction thereof. The plurality of extension sections include a plurality of straight sections and at least one curved section. Each curved section is provided between two adjacent straight sections.

Abstract: A spot-size conversion structure and a photonic device. The spot-size conversion structure includes: a substrate, an isolation layer and a waveguide layer arranged in sequence. The waveguide layer includes N sub-waveguide layers arranged in sequence along a direction away from the substrate, each of the sub-waveguide layers being of a protrusion shape, and N being a natural number and N?3. Wherein, the spot-size conversion structure has a first end face configured to be coupled to an integrated optical waveguide, and a second end face opposite to the first end face and configured to be coupled to an optical fiber.

Abstract: An optical modulation chip and a tunable laser are provided. The optical modulation chip includes: an electro-optic phase modulation circuit configured to modulate a wavelength of laser light input based on an electro-optic effect and a target wavelength mode; and a passband circuit configured to receive laser light output by the electro-optic phase modulation circuit, reflect and output at least a portion of laser light of the target wavelength mode of laser light input, and dissipate laser light outside the target wavelength mode of the laser light input.

Abstract: A folded electro-optic modulator is provided. The folded electro-optic modulator includes: a first main electrode, a first waveguide arm, a second main electrode, a second waveguide arm and a third main electrode arranged in sequence, and the following structures provided in each even-ordered radio-frequency modulation region of the folded electro-optic modulator: a plurality of first sub-electrodes; a plurality of second sub-electrodes; a plurality of third sub-electrodes; and a plurality of fourth sub-electrodes.

Abstract: A phase modulation module and an electro-optic modulator are provided. The phase modulation module has an input end face and an output end face and the phase modulation module comprises a substrate, an isolation layer, a waveguide layer, and an electrode layer which are arranged in sequence. The electrode layer includes a plurality of electrodes which are arranged at intervals and configured to form a modulating electric field region. The waveguide layer comprises a plate layer, a first ridge layer, and a second ridge layer which are arranged in sequence in a direction away from the substrate.

Abstract: A waveguide line electrode structure is provided. The waveguide line electrode structure includes a first ground electrode, a signal electrode and a second ground electrode that are sequentially arranged spaced apart from each other; an optical waveguide including a first branch and a second branch; a first covering layer; a second covering layer and at least one electrode extension portion.

Abstract: An electro-optic modulator is provided. The electro-optic modulator includes: an optical splitter; a first optical waveguide and a second optical waveguide; traveling wave electrodes including a first grounding electrode, a first signal electrode, a second signal electrode, and a second grounding electrode; extension electrodes including at least one first signal sub-electrode and two second signal sub-electrodes, where the two second signal sub-electrodes are arranged on both sides of the at least one first signal sub-electrode and the first signal electrode is electrically connected to the first signal sub-electrodes, and the second signal electrode is electrically connected to the second signal sub-electrodes.

Abstract: A spot-size converter, a photonic device, and a method for fabricating a spot-size converter are provided. The spot-size converter is provided with a first end face and a second end face parallel to each other and comprises a substrate, an isolation layer, a waveguide layer and a cover layer that are arranged in sequence. The substrate is provided with a first recess that is exposed to its top surface and the second end face. The isolation layer is provided with a second recess and a third recess that are exposed to its top surface and the second end face; the second recess is provided with a plurality of first holes communicating with the first recess, the third recess is provided with a plurality of second holes communicating with the first recess.

Abstract: A spot-size converter is provided. The spot-size converter includes a first end face and a second end face, and further includes a substrate, and an isolation layer, a first waveguide and a covering layer which are located on a side of the substrate. The first waveguide includes a flat-plate layer and a ridge layer. The flat-plate layer includes a first wide end extending to the first end face and a first narrow end extending to the second end face or having a distance from the second end face, and the flat-plate layer has a width decreasing in a gradient from the first wide end to the first narrow end and includes a first equal-width portion adjacent to the first narrow end. The ridge layer includes a second wide end extending to the first end face and a second narrow end having a distance from the first narrow end.

Abstract: A thermo-optic phase modulation module and an optical modulator are provided. The thermo-optic phase modulation module includes: a substrate; an isolation layer located on substrate; a first waveguide located on isolation layer; and at least one heating element located on the isolation layer and not overlapping with the first waveguide in a direction perpendicular to a bottom surface of the substrate. The thermo-optic phase modulation module is provided with a plurality of side heat insulation grooves extending downwardly from a top surface and exposing the substrate, and the plurality of side heat insulation grooves are arranged around the first waveguide and the at least one heating element.

Abstract: An electro-optic modulator is provided, which includes a waveguide layer and an electrode layer, where the electrode layer includes: a plurality of first sub-electrodes and a plurality of first connecting electrodes; a plurality of second sub-electrodes and a plurality of second connecting electrodes; a plurality of third sub-electrodes and a plurality of third connecting electrodes; and a plurality of fourth sub-electrodes and a plurality of fourth connecting electrodes, where the plurality of first sub-electrodes and the plurality of fourth sub-electrodes are grounded, the plurality of second sub-electrodes and the plurality of third sub-electrodes receive differential signals, the plurality of first sub-electrodes and the plurality of second sub-electrodes form a first electric field therebetween, and the plurality of third sub-electrodes and the plurality of fourth sub-electrodes form a second electric field therebetween; and the waveguide layer includes a first waveguide arm and a second waveguide arm.

Abstract: The application discloses a photonic device, a crossed waveguide, a waveguide layer and a method for manufacturing the same.

Abstract: A lithium niobate waveguide having weak phase drift includes a lithium niobate layer, a metal electrode, and a substrate layer. The lithium niobate layer includes a lithium niobate central ridge and lithium niobate extension surfaces extending towards two sides of the lithium niobate central ridge. A metal oxide layer is arranged on the upper surface of the lithium niobate central ridge. The substrate layer is located on the lower surface of the lithium niobate layer and is made of silicon, silicon dioxide, a multilayer material made of silicon and silicon dioxide or a multilayer material made of silicon dioxide, metal, and silicon, so as to further realize the purpose of inhibiting phase drift. Compared with other doped structures or other structures, the structure is simple in manufacturing method, and moreover, a very good phase drift suppression effect is achieved.

Abstract: The present disclosure provides a pharmaceutical preparation of a compound of formula (I) or a stereoisomer, pharmaceutically acceptable salt, or prodrug thereof. The present disclosure further provides a method for general anesthesia or sedation for mammals. Also provided are kits and manufactured products of the medicament and the pharmaceutical composition and a method for using the medicament and the pharmaceutical composition.

Abstract: The present disclosure provides a pharmaceutical preparation of a compound of formula (I) or a stereoisomer, pharmaceutically acceptable salt, or prodrug thereof. The present disclosure further provides a method for general anesthesia or sedation for mammals. Also provided are kits and manufactured products of the medicament and the pharmaceutical composition and a method for using the medicament and the pharmaceutical composition.