2results about How to "Wide working wavelength range" patented technology

The application provides a single-channel photonic crystal nonvolatile optical switch of electrochemical metallization, and aims at solving the technical problems of large power consumption and volatility of the existing photonic crystal optical switch.The application comprises a photonic crystal composed of a plurality of silicon dielectric columns, a photonic crystal waveguide with a TE forbidden band is arranged between the silicon dielectric columns, an input port of the input photonic crystal waveguide is an input end, an output port of the output photonic crystal waveguide is an output end, the input end and the output end are perpendicular to each other, a resonant cavity is arranged between the input photonic crystal waveguide and the output photonic crystal waveguide, a defect dielectric column is arranged in the resonant cavity, and the defect dielectric column is connected with a bias circuit for providing a bias voltage.The application has the advantages of small structure size, fast switch time response, high optical transmission efficiency, and suitability for large-scale optical path integration; and the application is convenient to integrate, and can realize the electrically-controlled optical switch of the TE carrier optical signal in a short distance and with high efficiency.

The present application relates to the technical field of fiber lasers, and particularly relates to a saturable absorber based on tantalum phosphide quantum dots and a preparation method and application thereof.The present application provides a saturable absorber based on tantalum phosphide quantum dots, comprising: tantalum phosphide quantum dots and a fused taper fiber, wherein the tantalum phosphide quantum dots are attached to the surface of the waist of the fused taper fiber; the saturable absorber based on tantalum phosphide quantum dots is used in a passively mode-locked laser, can output pulses with good stability, and has good stability and a wide working wavelength range.