60results about How to "Guaranteed Coupling Efficiency" patented technology

Disclosed are a laser transceiver device and a laser radar. The laser transceiver device includes a light-splitting coupling unit that splits original light into first original light and second original light, an emerging unit that forms emergent light according to the first original light, and an acquiring unit that acquires echoed light to form signal light, and further includes at least one ofa first acting surface that reflects part of the first original light to form first local oscillating light and a second acting surface that reflects parts of the second original light to form secondlocal oscillating light. Since the first local oscillating light is formed by the first original light partly reflected by the first acting surface and the second local oscillating light is formed bythe second original light partly reflected by the second acting surface, the first local oscillating light and the second local oscillating light have relatively low power, thus the power of the emergent light can be improved effectively, so as to effectively extend the detection distance of the laser radar and expand the detection range of the laser radar while keeping the process and cost unchanged.

The invention belongs to the technical field of optical communication and particularly relates to a COMBO PON optical component based on a passive PLC optical waveguide technology. The optical component integrates two transmitting terminals in a butterfly-shaped package through a wave-combining PLC chip, accordingly two transmitting parts and two receiving parts for outside optical path coupling are simplified into one transmitting part and two receiving parts, and coupling of outside optical paths is greatly simplified. The optical component can be installed in an XFP housing and can be alsoinstalled in an SFP+ housing, two receiving terminals adopt full-collimating optical paths, the responsivity is 1dB higher than that of a traditional scheme, and the overall yield of the optical component is improved.

The invention discloses a backlight module and an LCD (liquid crystal display). The backlight module comprises an LGP (light guide plate) and a light source, wherein the LGP comprises a reflecting surface and a light-emitting surface, two bottom surfaces and two side surfaces are arranged between the reflecting surface and the light-emitting surface, and each of the two bottom surfaces is provided with a supporting bottom surface; the light source is in long strip shape and is arranged corresponding to one of the side surfaces of the LGP, the backlight module further comprises supporting pillars, and the supporting bottom surface is provided with a contact inclined plane; the supporting pillars clings to the contact inclined plane; one gravity direction is parallel to the length direction of the light source, when the LGP changes along the gravity direction, a force is generated between the LGP and the supporting pillars, and the supporting pillars push the LGP to the light source under the effect of the force.

The invention relates to a high-sensitivity light receiving device. The high-sensitivity light receiving device comprises an optical fiber adapter, an isolator, a tube shell, a first lens, a semiconductor optical amplifier, a second lens, an optical detection PIN PD chip and an output circuit board, wherein through holes are formed in the end surface of one end of the tube shell; the optical fiberadapter is arranged at one end, provided with the through holes, of the tube shell; the isolator, the first lens, the semiconductor optical amplifier, the second lens and the optical detection PIN PDchip are separately packaged in the tube shell and are in optical path connection in sequence; the output end of the optical detection PIN PD chip is electrically connected with one end of the outputcircuit board; and the other end of the output circuit board is electrically connected with an external electric signal receiving device. According to the high-sensitivity optical receiving device, high-sensitivity receiving can be realized, the product percent of pass is high, electric control is simple, and cost is effectively reduced; the semiconductor optical amplifier and the optical detection PIN PD chip are integrated, so that the miniaturization of the device is realized, and the realization of miniaturized single-channel SFP packaging or multi-channel QSFP packaging is facilitated.

The invention provides a multifunctional integrated device for an ASE optical fiber source and belongs to the field of optical fiber communication. According to the multifunctional integrated device, an optical fiber collimator, a wavelength division multiplexer, an optical isolator, an optical switch and filters are integrated on a semiconductor chip. 980nm pump light is collimated and coupled through the wavelength division multiplexer and enters a rare-earth-doped optical fiber, and light generated by the rare-earth-doped optical fiber is collimated and coupled through the wavelength division multiplexer, the optical isolator and the filters and enters an output optical fiber. Based on the spectral signature of the light generated by the rare-earth-doped optical fiber, the filters are selected; specifically, when the spectrum of the light generated by the rare-earth-doped optical fiber is a 1560nm Gaussian spectrum, a chirp grating is selected; when the spectrum of the light generated by the rare-earth-doped optical fiber is a 1530nm Gaussian spectrum, the relay filter is selected, and when the spectrum of the light generated by the rare-earth-doped optical fiber is a flat spectrum, the band-pass filter is selected. The angle of the wavelength division multiplexer is 3.5 degrees. The multifunctional integrated device for the ASE optical fiber source guarantees the reflection efficiency and the coupling efficiency, reduces splice loss between devices and is small in size, good in stability and convenient to use.

The invention discloses a novel electromagnetic shielding piezoelectric interlayer. The novel electromagnetic shielding piezoelectric interlayer comprises a flexible printed circuit board, a piezoelectric sensor and an SMA interface, wherein the piezoelectric sensor is pasted on one side of the flexible printed circuit board, the SMA interface is fixedly connected to the other side of the flexible printed circuit board, and an insulating film is laid on the reverse side of the fixed connection position. According to the technical scheme, the novel electromagnetic shielding piezoelectric interlayer improves the resistance to high frequency electromagnetic interference, weakens crosstalk of signals in an adjacent piezoelectric interlayer, increases the signal to noise ratio of the signals, improves the reliability and consistency, enhances the coupling efficiency between the piezoelectric sensor and a structure, ensures the stimulation performance and sensor capability of the piezoelectric sensor, and boosts the wide application to astronautic structure health monitoring.

The invention discloses an ytterbium-doped multicore photonic crystal optical fiber mode-locked laser, which belongs to the technical field of laser. The laser has a sigma cavity structure, a main body of the laser is based on a ytterbium-doped multicore photonic crystal optical fiber, and a single-mode optical fiber is used as a mode selector for selecting modes; the laser works in a totally positive dispersion area, no chromatic dispersion compensating element is in a cavity, and a semiconductor saturable absorption mirror is used for starting mode locking. The invention has the advantages of stability and easy operation of mode selection and wide spectrum, narrow pulse width and high energy of output pulse; the mode field area of the used multicore photonic crystal optical fiber is two orders of magnitude larger than that of an ordinary optical fiber, the single pulse energy which can be supported by the multicore photonic crystal optical fiber is also more than 100 times than that of a traditional optical fiber laser, a used mode-selecting element is a single mode optical fiber, and the far-field distribution of an output mode field is gauss distribution.

The invention discloses a backlight module comprising light sources and a light guide plate, wherein the light guide plate comprises a light incident side; rays emitted by the light sources enter into the light guide plate through the light incident side; the light incident side is provided with a ray steering layer; and the tray steering layer is used for changing the direction of rays entering into the light incident side so as to shorten the distance from a cross point of rays emitted by two adjacent light sources to the light sources in the direction vertical to the light incident side. The invention also discloses a liquid crystal display.

The invention relates to a high-power pump beam combiner, which comprises a glass tube, an input fiber and an output fiber, wherein the glass tube is in a hollow structure; the input fiber passes through the glass tube; one end of the glass tube and one end of the input fiber are subjected to fusing and tapering to form a beam structure tapering section; and the output fiber is connected with the tapering section. The output fiber comprises a fiber core and a wrapping layer wrapping the fiber core. The diameter of the tapering section is smaller than the diameter of the fiber core. The invention also provides a fiber laser using the high-power pump beam combiner. According to the fiber laser and the high-power pump beam combiner thereof, one end of the glass tube and one end of the input fiber are subjected to fusing and tapering to form the tapering section, so that the numerical aperture of the input fiber is allowed to be smaller than or equal to the numerical aperture of the output fiber, coupling efficiency is effectively ensured, and light output efficiency is improved.

The invention discloses a double-frequency-band low-phase-noise voltage-controlled oscillator and a signal generation device, and belongs to the technical field of circuit design, a coupling resonant cavity network comprises a first coupling resonator and a second coupling resonator, and the first coupling resonator and the second coupling resonator generate different resonant frequency signals under the control of tuning voltage; the emitter of the transistor is respectively connected to the output ends of the first coupled resonator and the second coupled resonator, and the transistor is used for amplifying the resonant frequency signal; and the broadband negative resistance network is connected with the base electrode of the transistor and is used for generating uniform or constant negative resistance on a tuning frequency band. The coupling resonant cavity network provides needed oscillation frequency, the negative resistance network is coupled with the base electrode of the transistor, the negative resistance value which uniformly changes in the whole transmission band is provided, and therefore it is guaranteed that the VCO can maintain stable oscillation in the whole S wave band, and meanwhile the good noise performance is kept.

A two-dimensional side coupling photonic crystal waveguide single-channel system relates to a microstructure photonic crystal element in the technical field of optics, which can achieve efficient coupling between photonic crystal waveguide and a traditional optical device or an externally-arranged light source. The two-dimensional side coupling photonic crystal waveguide single-channel system adopts a mode that a plurality of photonic crystal resonant cavities are connected in parallel. An electromagnetic wave enters a coupling system formed by parallelly connecting the plurality of photonic crystal resonant cavities from a coupling area in a waveguide second area. The electromagnetic wave with the same waveguide response frequency with the parallelly connected photonic crystal resonant cavities and photonic crystal and photonic crystals enters a defect area through efficient coupling of the plurality of parallelly connected photonic crystal resonant cavities, achieves one-sided transmission in the defect area and emits out through one side of the photonic crystal waveguide, thereby achieving the purpose of improving coupling area. The coupling efficiency is high, and the photoniccrystal waveguide is compact in structure, small in size and high in integration level.