35results about How to "Improve electro-optic efficiency" patented technology

The invention relates to a high precision speed and distance measuring laser radar system and a speed and distance measuring method. The basic principle of the invention is as follows: linear chirp modulation and pseudo-random code modulation of lasers are performed; most lasers after modulation are taken as outgoing lasers and transmitted by a telescope; a small part of the lasers is taken as local oscillator beams and used for coherent detection; laser echo signals are divided into two parts; distance information is obtained after related operation of one part of the laser echo signals and original pseudo-random codes; the frequency difference of the local oscillator beams and echo signal beams is obtained after coherent detection of the other part of the laser echo signals and the local oscillator beams and pulse compression, and simultaneously comprises the distance information and Doppler shift; the Doppler shift is obtained through mathematical manipulation, thereby speed information is obtained. The high precision speed and distance measuring laser radar system and a speed and distance measuring method of the invention is characterized in that the speed information and the distance information of a target can be obtained with high precision.

An embodiment of the present invention provides a method for manufacturing an organic light-emitting display panel, which is used to improve the electro-optical efficiency of a display device. The method includes: forming a first anode and a second anode on a substrate, sequentially forming a first hole transport layer, a first organic light-emitting layer, a first electron transport layer, a An insulating layer and a first cathode in a certain width area on the side of the organic light-emitting layer; a second hole transport layer, a second organic light-emitting layer, and a second electron transport layer are sequentially formed on the second anode, and are located on the periphery of the second anode The insulating layer, the second cathode; the second cathode is partly connected to the first anode.

The invention provides a speed measurement and distance measurement system and a speed measurement and distance measurement method based on pseudo-random code phase modulation and heterodyne detection. The basic principle is that laser is divided into two parts via a coupler. The majority part is subjected to phase modulation through an electro-optic phase modulator according to a pseudo-random code signal and is transmitted by a telescope as emergent laser; the other part is subjected to frequency shift through an acousto-optic frequency shifter and is used for coherent detection as a local oscillator signal; a laser echo signal and the local oscillator signal are subjected to a coherent action in the coupler, an electric signal is converted through a photoelectric balance detector, and a digital signal is converted through a dual-channel AD acquisition card; the other channel of the dual-channel AD acquisition card acquires a driving signal of the electro-optic phase modulator; and the acquired two ways of signals are subjected to signal processing in a computer. The invention provides a new method of simultaneously acquiring the target speed and the distance information in a high-precision mode.

The invention belongs to the field of laser technology, and specifically relates to a semiconductor pumped gas laser system based on an electromagnetic drive mode, including a laser working medium generating device based on an electromagnetic drive mode, a plume area, and a semiconductor pump system; when the system is working, the laser The working medium generating device ionizes the working medium under the action of electric field and magnetic field to generate plasma, and the plasma is accelerated under the combined action of electromagnetic field to form a plume area, which can be used as the working medium of the laser gain medium in the semiconductor The laser output is realized under the pumping action of the pumping system; at the same time, due to the high-speed movement of the working medium in the plume area, the waste heat generated during the laser pumping process is efficiently discharged; it has all-electric operation, light weight and compactness, high specific power, and high efficiency The advantages of thermal control and single-aperture output promote the development of a new generation of laser light sources with high electro-optical efficiency, high beam quality and high average power.

A 2.5 Uygur photonic crystal surface emanant laser, including: the wafer; the first DBR layer that is made on the wafer; the below envelope that is made on the first DBR layer; the active layer that is made on the below envelope, and forms the photonic crystal structure on it by the eroding technics; the top envelope that is made on the active layer; the p+ envelope that is made on the top envelope; the second DBR layer that is made on the p+ envelope; the top electrode with the hole that is made on the second DBR layer; the below electrode that is made on the bottom surface of the wafer and covers it.

The invention discloses an integrated LED light-emitting device and its manufacture. Its integrated LED light-emitting device includes: at least two LED light-emitting epitaxial units separated from each other, including upper and lower surfaces, the upper surface of which is a light-emitting surface; an electrode pad layer, formed on the lower surface of the LED light-emitting epitaxial unit, has The thickness is sufficient to support the LED epitaxial unit and connect the various LED light-emitting epitaxial units to form a plane connection circuit without height difference; the electrode pad layer is divided into P and N electrode areas. The LED light-emitting epitaxial units form a series, parallel or series-parallel circuit. The invention can effectively improve the problems of package welding, electrode shading, poor connection stability and the like.

The invention relates to a frequency-selective 355nm ultraviolet laser in a Brewster angle cavity pumped by an optical fiber end face. The 808nm semiconductor laser generates the pump laser and focuses it into the coupling head through the 808nm export fiber; the focused 808nm pump laser enters the plano-convex resonator through the plano-convex front mirror; excites the YVO4 crystal to generate 1064nm laser; the 1064nm laser is in the plano-convex resonator Continuously excited and oscillated inside to generate a mixed laser, the mixed laser is emitted from the Brewster angle of the triple frequency LBO crystal, and is divided into beams with different deflection angles, among which the 355nm laser enters the power attenuator after being filtered by the substrate, and enters the expansion Beam mirror, after adjusting the spot diameter and divergence angle, output through the output window mirror. The non-355nm garbage light enters the garbage light recycling bin through the turning prism. The invention has ingenious structure and reasonable design, can keep the temperature of each module inside the laser constant, and stabilize the output power and optical quality of the laser.

The electro-optical Q-switch dual-frequency dual-pulse laser lithotripsy system involves the technical field of light-based medical devices, and solves the problem of lack of a laser lithotripsy system that can safely pulverize stones of different sizes, has high electro-optical efficiency, and is easy to change the pulse width. The system includes a total reflection mirror , electro-optic Q-switching switch assembly, drive circuit, controller, pump source, gain medium, output mirror, first focusing mirror, frequency doubling crystal, second focusing mirror, coupling lens and output fiber; electro-optic Q-switching switch assembly and gain The medium is located between the total reflection mirror and the output mirror; the controller controls the operation of the pump source, and controls the voltage on the electro-optic Q-switching switch component through the control drive circuit, so that the system outputs a dual-frequency pulse width of 1μs-1.5μs or 200μs-300μs laser beam. The invention can pulverize large calculi, can also realize soft tissue cutting around the calculus, has high electro-optical efficiency and is easy to change the pulse width, and is suitable for clinical use.