Abstract: Provided is an electro-optic modulator, comprising: a first light-splitting element, comprising a first input port configured to input an operating signal, a first output port configured to output a main path signal, and a second output port configured to output a first monitoring signal; a second light-splitting element, two waveguide arms, a bias voltage modulation circuit, a radio frequency modulation circuit, a third light-splitting element, and a fourth light-splitting element.

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: 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: 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 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 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: 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.