8results about How to "Improve optical coupling efficiency" patented technology

The present disclosure provides a grating coupler and a manufacturing method thereof. The grating coupler includes a first light reflection structure disposed above a substrate, a grating structure located above the first light reflection structure, and a first waveguide structure coupled with the grating structure, the grating structure being spaced apart from the first light reflection structure by a predetermined interval, the first light reflection structure being formed by a metal layer for device interconnection, for reflecting light leaked from the grating structure to the substrate to the grating structure, and coupled to the first waveguide structure.

The invention relates to the technical field of liquid crystal display devices, in particular to a reflective liquid crystal display panel, a preparation method of the reflective liquid crystal display panel and a reflective liquid crystal display device. The reflective liquid crystal display panel comprises a first substrate, a liquid crystal layer and a second substrate which are sequentially laminated, the cholesterol type liquid crystal composition comprises nematic liquid crystal, a hydrophobic first chiral compound and a hydrophilic second chiral compound, and the optical rotation of the first chiral compound is opposite to that of the second chiral compound; a hydrophilic interface is formed on the side, facing the liquid crystal layer, of one of the first substrate and the second substrate. The limitation that the theoretical reflectivity of a single-optical-rotation cholesterol liquid crystal does not exceed 50% is broken through, and the overall reflectivity and the display brightness are improved. As the components with different optical activities are vertically layered in the same liquid crystal continuous phase instead of forming an independent double-layer structure by means of external attachment, no obvious independent mechanical interface exists between the layers, the light scattering loss can be reduced, and the optical coupling efficiency can be improved.

The invention relates to the technical field of underwater long-distance communication, and particularly discloses an underwater wireless high-speed optical communication system, which comprises a transmitting end, a receiving end and a control unit, the transmitting end is used for generating a light beam, performing collimation and beam expansion processing on the light beam, adjusting the deflection angle of the light beam, and transmitting the light beam through an underwater channel; the receiving end is used for receiving a light beam from an underwater channel, filtering stray light and splitting the light beam into two paths: one path is used for demodulating communication data, and the other path is used for detecting the position of a light spot; the control unit is used for calculating the light spot offset according to the detected light spot position information and generating a correction instruction to adjust the deflection of the emitted light beam so as to correct the light beam direction; according to the invention, the direction of the light beam is corrected by detecting the position of the underwater light spot and feeding back and adjusting the deflection angle of the transmitting end.

The present disclosure provides an organic light-emitting device and a display device, and belongs to the technical field of display. The organic light-emitting device comprises a first electrode layer, a light-emitting functional layer, a second electrode layer and a cover layer which are sequentially stacked, wherein the cover layer comprises a first cover layer material and a second cover layer material; the first cover layer material and the second cover layer material satisfy the following conditions: n1(λ1)-n2(λ1)≥0.2, 440nm≤λ1≤480nm; n1(λ2)-n2(λ2)≥0.1, 500nm≤λ2≤550nm; n1(λ3)-n2(λ3)≥0.1, 600nm≤λ3≤640nm.

This invention discloses an optimization system for laser stimulated emission devices (SEMI) in optical communication chips, relating to the field of optical communication chip technology. Addressing the problems of existing SEMI devices that only optimize in a single dimension, suffer from low fault location accuracy and poor maintenance efficiency in large-scale cluster scenarios, this invention integrates modules for control, compensation optimization, closed-loop control testing, temperature control, stress suppression, heat dissipation, anti-interference, optical coupling, power consumption control, and fault location maintenance within the device itself. These modules work together to achieve dynamic control of the epitaxial structure, lattice mismatch compensation, closed-loop control of epitaxial wafer uniformity and domestic high-frequency testing, precise temperature control and drift suppression, stress and parasitic capacitance suppression, load-adaptive heat dissipation, electromagnetic interference suppression, improved optical coupling efficiency, reduced power consumption, and precise fault location and closed-loop maintenance. This invention effectively improves device performance, stability, and maintenance efficiency, reduces maintenance and testing costs, adapts to the large-scale application of high-speed optical communication, and promotes the independent development of optical communication chip technology.

The utility model discloses a critical space laser ranging device, including laser emission module and receiving module, laser emission module includes laser, emission lens barrel and emission collimating optical system, and the laser is fixed at the back end of emission lens barrel, and emission collimating optical system is located in emission lens barrel, and emission collimating optical system includes first double concave lens, first double convex lens, second double concave lens and second double convex lens, receiving module includes receiving lens barrel, focusing system and detector, and focusing system is located in receiving lens barrel, and focusing system includes third double convex lens, first meniscus and second meniscus, and the detector is fixed at the back end of receiving lens barrel. The utility model improves laser emitter's output power density and beam quality, realizes the spatial concentrated distribution of energy through the divergence angle of emission beam is suppressed, and the focusing characteristic of echo beam is optimized simultaneously, improves the optical coupling efficiency, thereby enhances the signal to noise ratio of detector receiving signal.

The application relates to an optical coupling system and a preparation method thereof. The preparation method of the optical coupling system comprises the following steps: providing a substrate, mounting an optical chip on the substrate to form a first intermediate component 10; fixing an optical fiber in a fixing structure to form an optical fiber assembly; providing a connecting assembly, the connecting assembly comprising a chip-side connector and an optical fiber-side connector, the chip-side connector and the optical fiber-side connector being used for detachable connection; fixing one end of the optical fiber-side connector with the optical fiber assembly and connecting the other end of the optical fiber-side connector with the chip-side connector to form a second intermediate component 20; adjusting the position of the second intermediate component 20 relative to the first intermediate component 10; stopping the adjustment of the relative position when the optical chip and the optical fiber achieve optimal optical coupling, and fixing the chip-side connector on the substrate. The application can simultaneously realize fast and accurate optical coupling of the optical chip and the optical fiber.

The utility model belongs to petroleum logging instrument technical field discloses a kind of lanthanum bromide crystal detectors special for element logging instrument. Including lanthanum bromide crystal;Iron fluorine Long protective sleeve, it is cut along the center axis and is equipped with conical opening, to tightly wrap lanthanum bromide crystal and leave out light receiving surface in the side towards photomultiplier;Crystal shell assembly, for accommodating and protecting iron fluorine Long protective sleeve and lanthanum bromide crystal;Multiplying tube shell, with crystal shell assembly can be detached connection;Photomultiplier, located in multiplying tube shell and with multiplying tube shell gap cooperation, and by elastic component, so that photomultiplier and lanthanum bromide crystal are always tightly contacted;Probe end cover, one end with multiplying tube shell detachable connection, the other end with electronic skeleton detachable connection;And electronic skeleton, for fixed circuit board, circuit board and photomultiplier electric connection. The utility model's lanthanum bromide crystal detector special for element logging instrument structure is compact, anti-seismic, easy to maintain and light collection efficiency is high.