5results about How to "Wide working wavelength range" patented technology

The invention relates to a front-end superfine-diameter optical imaging module for an ophthalmic fiber-optic endoscope system. The front-end superfine-diameter optical imaging module for the ophthalmology optical fiber endoscope system comprises a superfine-diameter objective lens; the superfine-diameter objective lens comprises a front lens group and a rear lens group; the front lens group comprises a first lens element with negative focal power and a second lens element with negative focal power, each of the first lens element and the second lens element comprises an object side surface and an image side surface, the first object side surface of the first lens element is a plane, the first image side surface of the first lens element is a concave surface, and the second object side surface of the second lens element is a convex surface. The second object side surface of the second lens element is a concave surface, the second image side surface of the second lens element is a plane, and the concave surfaces are oppositely attached; according to the front-end superfine-diameter optical imaging module for the ophthalmic optical fiber endoscope system, the overall boundary dimension is effectively reduced, the machining and assembling difficulty is greatly reduced, and the stability of the system is improved.

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.

The invention belongs to the field of fluorescent optical fiber sensors, and particularly relates to a preparation and use method of a portable down-conversion tellurate optical fiber temperature sensor. At present, most (doped) tellurate optical fibers based on the fluorescence intensity ratio technology are upconversion materials and are difficult to couple with multimode optical fibers, the sensitivity needs to be improved when the (doped) tellurate optical fibers serve as temperature sensors, and laser exciters large in weight and size are needed. Aiming at the problems in the prior art, TeO2, ZnO, Bi2O3 and Er2O3 are adopted to prepare the down-conversion rare earth doped tellurate optical fiber, and the coupling performance is good when the down-conversion rare earth doped tellurate optical fiber is welded with a multimode optical fiber; the prepared temperature sensor is high in sensitivity and good in stability; and an ultraviolet lamp is adopted for pumping, so that temperature monitoring is facilitated.

The invention relates to a 2.5 D / 3D photoelectric co-packaging device based on an electro-absorption modulator and a preparation method of the 2.5 D / 3D photoelectric co-packaging device. The 2.5 D / 3D photoelectric co-packaging device comprises a germanium-silicon electro-absorption modulator (1). Through the optical interconnection architecture design for high-performance calculation, the wavelength division multiplexing technology is used for widening the number of channels of a single fiber, the design of a high-performance germanium-silicon electric absorption modulator which works stably under multiple wavelengths is achieved, and the process development of an active adapter plate of a single crystal germanium-silicon material with high-quality selective epitaxial growth is achieved; therefore, the TSV active silicon adapter plate 2.5 D / 3D optical engine with high speed, large bandwidth and small volume for optical IO is realized.