74 results about "Solid state amplifiers" patented technology

A ring laser includes a large-core rare-earth-doped fiber ring-connected with a free-space path having an electro-optic switch, output coupler, and intracavity band-pass filter to enforce lasing operation in narrow wavelength range. In some cavity-dumped modes, the laser is configured in a similar manner, except that an output coupler is omitted since the optical power is extracted from the laser cavity by the electro-optic switch itself. The same laser can be configured to operate in Q-switched and / or cavity-dumping modes as well as in hybrid modes (e.g., partial Q-switch, followed by cavity dumping, or even CW). In some embodiments, the laser can be used as, or inject laser light into, a regenerative solid-state amplifier, or a Raman laser, or can be also used to generate visible, ultra-violet, mid-infrared, and far-infrared (THz) radiation via nonlinear wavelength conversion processes. The various embodiments can use a power oscillator or seed-plus-amplifier MOPA configuration.

A Chirped pulse amplification (CPA) fiber laser system. The CPA fiber laser system includes a fiber mode-locking (ML) oscillator implemented as a cavity dumped ML oscillator including a cavity dumper for generating a seed laser at a reduced repetition rate to project to a pulse stretcher for stretching a pulse width of the laser. The CPA fiber laser system further includes a multistage amplifier chain for generating an amplified laser to project to a compressor for compressing the amplified laser. The multistage amplifier chain further includes a hybrid amplifier includes a solid-state amplifier to generate a laser of approximately 1˜10 mJ for a 10-100 KHz repetition rate.

The invention relates to a full-coverage multi-channel multi-frequency band measuring and control system of a deep space electric propulsion asteroid spacecraft, comprising a star service computer and a plurality of deep space responders and an ultra high frequency (UHF) relay transceiver which are connected with the star service computer; the deep space responders are further connected with multiplexers and high-stability crystal oscillators, and the multiplexers are connected with all-directional receiving antennas and large-diameter directional antennas; the deep space responders are also connected to the input ends of low-power solid-state amplifiers and high-power traveling wave tube amplifiers through switch arrays, and the output ends of the low-power solid-state amplifiers and the high-power traveling wave tube amplifiers are connected to all-directional transmitting antennas and low-gain transmitting antennas through the switch arrays; and the UHF relay transceiver is connected with a relay transceiving antenna. According to the invention, the full-coverage multi-channel multi-frequency band measuring and control system of the deep space electric propulsion asteroid spacecraft can meet all-process star-earth remote control, remote detection, range finding and other requirements of the deep space asteroid spacecraft as well as the relay communication requirements of the asteroid spacecraft simultaneously, and has the advantages of high reliability, resource saving and low cost.

In at least one embodiment time separated pulse pairs are generated, followed by amplification to increase the available peak and / or average power. The pulses are characterized by a time separation that exceeds the input pulse width and with distinct polarization states. The time and polarization discrimination allows easy extraction of the pulses after amplification. In some embodiments polarization maintaining (PM) fibers and / or amplifiers are utilized which provides a compact arrangement. At least one implementation provides for seeding of a solid state amplifier or large core fiber amplifier with time delayed, polarization split pulses, with capability for recombining the time separated pulses at an amplifier output. In various implementations suitable combinations of bulk optics and fibers may be utilized. In some implementations wavelength converted pulse trains are generated. A method and system of the present invention can be used in time domain applications utilizing multiple beam paths, for example spectroscopy.

Shared-current electronic systems (10, 20, 26, 30, 38, 48, 66, 70, 82, 90, 96, 100, 104, 108, 118, and 122) include two or more solid-state electronic devices, such as a solid-state amplifying device Q1, a baseband processor 110, and a multiplier / upconverter 112, that are connected in dc series or dc series-parallel, and that either fixedly or variably share percentages of a dc supply voltage. Various embodiments produce separate rf outputs, variably shift the phase of a single rf output, variably shift rf power between / among rf outputs, or produce a frequency-compressed modulation. RF decoupling of the dc series-connected electronic devices comprises making an effective series resistance (ESR) of an rf decoupling capacitance lower than the ESR of a porcelain capacitor that resonates at the operating frequency of the electronic device that is being decoupled.

A pulsed fiber laser oscillator and laser systems incorporating such laser oscillators are presented. The laser oscillator first includes a light generating module which generates optical pulses having an initial spectral profile. A spectrum tailoring module tailors the initial spectral profile of the optical pulses by imposing a phase variation on each optical pulse according to an optimized phase varying function. The optimized phase varying function has one of a rectified sinusoidal shape, a parabolic shape and a rectified parabolic shape. Laser systems incorporating such oscillators may be of a MOPA configuration, and may further include a nonlinear crystal for frequency conversion or a bulk solid-state amplifier.

A high power, high frequency, solid state power amplifier system includes a plurality of input multiple port splitters for receiving a high-frequency input and for dividing the input into a plurality of outputs and a plurality of solid state amplifier units. Each amplifier unit includes a plurality of amplifiers, and each amplifier is individually connected to one of the outputs of multiport splitters and produces a corresponding amplified output. A plurality of multiport combiners combine the amplified outputs of the amplifiers of each of the amplifier units to a combined output. Automatic level control protection circuitry protects the amplifiers and maintains a substantial constant amplifier power output.

The present invention provides a 2[Mu]m high-energy single frequency pulsed laser based on optical fiber solid cascade amplification. A low-power continuous single frequency seed resource is taken asa front end, the continuous single frequency seed resource is chopped to pulse light through adoption of an acoustic optical modulator, and the pulse repetition rate, pulse width and waveforms after chopping are flexibly controlled through control of the drive repetition rate, pulse width and waveforms of the acoustic optical modulator. A polarization maintaining optical fibre amplifier and a solid-state amplifier are employed to achieve energy amplification of the single-frequency pulse laser to finally achieve 2[Mu]m high-energy single frequency pulsed laser output. The low-power continuoussingle frequency seed resource is stable and reliable in single frequency performance, and high in capacity of resisting disturbance; the polarization maintaining optical fibre amplifier is employed at a preceding stage to effectively improve the small signal amplification capacity; and solid amplification is employed at a backward stage to easily generate single-frequency pulse laser output of high-pulse energy and high-peak power. The laser is simple in structure, stable in system and adjustable in parameter, can be suitable for a general working environmental requirement, and can be suitable for airborne and satellite-borne requirements.

The invention relates to a laser generating system and method. The system includes a time domain programmable pulse laser, a fiber amplifier stage, a pattern matcher, a solid state amplifier stage and a feedback device; the time domain programmable pulse laser generates initial pulse laser with preset time domain waveform; the fiber amplifier stage performs power amplification on the initial pulse laser; the amplified laser and pump light in the solid state amplifier stage are subjected to pattern matching through the pattern matcher; the solid state amplifier stage performs power amplification on the laser which has been processed by the pattern matcher; the feedback device obtains feedback signals and transmits the feedback signals to the time domain programmable pulse laser; and the time domain programmable pulse laser adjusts the time domain waveform of the initial pulse laser according to the feedback signals, so that the solid state amplifier stage can output laser with preset time domain waveform. With the laser generating system and method of the invention adopted, high-repetition rate and high-brightness laser with preset time domain waveform can be generated.

The invention relates to a synchrotron high-frequency system and a frequency and cavity pressure regulating method thereof, wherein the system comprises: an all-solid-state amplifier; a coaxial resonant cavity loaded by a soft magnetic alloy material; and a low-level controller. The low-level controller comprises: a clock network module; an analog-to-digital converter; a digital processor; a digital-to-analog conversion module; and a signal synthesis module. The synchrotron high-frequency system adjusts the frequency of a synthesized signal provided for the all-solid-state amplifier accordingto preset reference frequency information, and performs feedback adjustment on the amplitude phase of the synthesized signal provided for the all-solid-state amplifier according to preset cavity pressure reference amplitude phase information and the cavity pressure actual amplitude phase information (loaded in an RF signal output from the coaxial resonant cavity) in the coaxial resonant cavity, thereby achieving fast and precise continuous regulation of the frequency and cavity pressure of the coaxial resonant cavity, achieving acceleration control of protons, and meeting the different protonspeed needs for different symptoms.

The invention discloses a power amplifying device, comprising: a solid state amplifier used for carrying out power amplification and gain compensation on a downlink satellite signal with a frequency range of 12.25-12.75GHz from a satellite to output a driving signal; a downward Ku frequency band traveling wave tube connected with the solid state amplifier and used for carrying out power amplification on the driving signal after receiving the driving signal to output a satellite downlink signal with an adjustable output power size range, wherein the output power size range is larger than 0 watt and is smaller than or equal to 750 watts. The power amplifying device is used for solving the technical problem that an electronic device in the prior art lacks a high-power traveling wave tube whose working efficiency is a downward Ku frequency band, and achieving a technical effect of obtaining a Ku frequency band high-power traveling wave tube power amplifier.

A laser light-source apparatus includes; a seed light source; a fiber amplifier configured to amplify pulse light output from the seed light source based on gain switching; a solid state amplifier configured to further amplify the resultant pulse light; a nonlinear optical element configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element that is disposed between the fiber amplifier and the solid state amplifier and is configured to remove ASE noise; and a control unit. The control unit is configured to control the optical switching element in such a manner that propagation of light is permitted in an output period of the pulse light from the seed light source, and is stopped in a period other than the output period.

A ring laser includes a large-core rare-earth-doped fiber ring-connected with a free-space path having an electro-optic switch, output coupler, and intracavity band-pass filter to enforce lasing operation in narrow wavelength range. In some cavity-dumped modes, the laser is configured in a similar manner, except that an output coupler is omitted since the optical power is extracted from the laser cavity by the electro-optic switch itself. The same laser can be configured to operate in Q-switched and / or cavity-dumping modes as well as in hybrid modes (e.g., partial Q-switch, followed by cavity dumping, or even CW). In some embodiments, the laser can be used as, or inject laser light into, a regenerative solid-state amplifier, or a Raman laser, or can be also used to generate visible, ultra-violet, mid-infrared, and far-infrared (THz) radiation via nonlinear wavelength conversion processes. The various embodiments can use a power oscillator or seed-plus-amplifier MOPA configuration.

A microwave transmitter circuit including a divider series feed signal line, a collector series feed signal line, a plurality of parallel solid state amplifier coupler circuits connected between divider series feed line and the collector series feed line, and phase shifting circuitry distributed along the collector series feed line for compensating phase tracking error between the divider series feed line and the collector series feed line.

Ultrafast solid state amplifiers of electrical current, including power amplification devices, use injection of spin-polarized electrons from a magnetic region into another magnetic region through a semiconductor control region and electron spin precession inside the control region induced by a magnetic field resulting from a current flowing through a conductive nanowire. The amplifiers may include magnet-semiconductor-magnet heterostructures and are able to operate on electric currents and electromagnetic waves having frequencies up to 100 GHz or more.

Radiation from a VBG-locked diode-laser at a locked wavelength of 878.6 nm is focused into a 30-mm long Nd:YVO4 optical amplifier crystal for optically pumping the crystal (24). The crystal amplifies a beam of seed-pulses from a fiber MOPA (12). The power of pump radiation is about 75 Watts. The radiation is focused into a beam-waist having a minimum diameter of about 600 micrometers. This provides an amplifier having a high gain-factor well over 100. The high-gain factor provides a gain-shaping effect on the seed-pulse beam which overcomes thermal aberrations inherent in such high-power pumping, thereby producing an amplified seed-pulse beam with M2 less than 1.3.

A laser light-source apparatus includes: a seed light source; a fiber amplifier configured to amplify pulse light output from the seed light source based on gain switching; a solid state amplifier configured to further amplify the resultant pulse light; a nonlinear optical element configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element that is disposed between the fiber amplifier and the solid state amplifier and is configured to remove ASE noise; and a control unit. The control unit is configured to control the optical switching element in such a manner that propagation of light is permitted in an output period of the pulse light from the seed light source, and is stopped in a period other than the output period.

A laser light-source apparatus includes: fiber amplifiers and a solid state amplifier configured to amplify pulse light output from a seed light source based on gain switching; nonlinear optical elements configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element configured to permit or stop propagation of pulse light from the fiber amplifier to the solid state amplifier; and a control unit configured to control the optical switching element in such a manner that the propagation of the light is stopped in an output period of the pulse light from the seed light source, and permitted in a period other than the output period of the pulse light from the seed light source.

The invention discloses a high-reliable power amplifier for a Ku-waveband for satellites. The power amplifier comprises a microwave amplifying circuit, a band-pass filter, a power source modulator circuit, and a second harmonics suppression circuit. The microwave amplifying circuit comprises a power amplification single chip, a filter and a power tube. The second harmonics suppression circuit is formed by a high impedance wire and a low impedance wire. The power source modulator circuit is formed by a driving circuit and an MOS (metal oxide semiconductor) tube. Modular design is utilized, thermal design and derating design are effectively performed, high-confidence reliability demonstration and experimental technique, accelerated life test method, and reliability degree prediction technique are utilized, and output power of the Ku-waveband is enabled to be higher than 15W. The power amplifier is a satellite-used GaAs solid amplifier with the gain larger than 35dB.

The invention provides a high-power microwave generation device and method. The generation device comprises an integrated controller, a signal source, a primary solid-state amplifier, a power divider,a plurality of identical secondary solid-state amplifiers, a plurality of identical klystrons, a synthesizer and a pulse compression device; and the centralized controller is connected with a signalsource, the signal source is connected with the primary solid-state amplifier, the primary solid-state amplifier is connected with the power divider, the power divider is connected with the pluralityof same secondary solid-state amplifiers, the plurality of secondary solid-state amplifiers are respectively connected with the corresponding klystrons, the klystrons are respectively connected with the synthesizer, the synthesizer is connected with the pulse compression device, and the pulse compression device further amplifies a synthesized radio frequency signal. The implementation method is simple, the cost is low, the reliability is high, the size is small, and certain maneuvering performance is achieved; and meanwhile, the high-power microwave generation device can also be used as an integrally designed transmitter of a high-power radar, a jammer, a microwave weapon and the like.

The invention relates to a satellite-borne X-frequency band data transmission out-of-band rejection device and a satellite-borne X-frequency band data transmission out-of-band rejection method. The satellite-borne X-frequency band data transmission out-of-band rejection device comprises a level converter, a base band filter, a BPSK (Binary Phase Shift Keying) modulator, an X-frequency band carrier signal generator, an amplifier and an isolator. By converting the level of inputted low-frequency base band data, the satellite-borne X-frequency band data transmission out-of-band rejection device outputs a bipolar level signal, the data and an X-frequency band carrier signal are sent into the BPSK modulator to be modulated together after base band shaping filtration is performed by the base band filter, and therefore the data are modulated into the X frequency band. The output frequency spectrum of the BPSK modulator can meet the out-of-band rejection requirement, and the modulated data sequentially pass through the amplifier and the isolator and are then outputted to a solid-state amplifier or an antenna. The satellite-borne X-frequency band data transmission out-of-band rejection device can meet the out-of-band rejection requirement without affecting data transmission modulation characteristics and the data transmission communication error rate and with the same size, power consumption and weight, and is particularly applicable to projects with high working frequency and low data transmission bit rates, such as lunar exploration projects.

The invention provides a troubleshooting system and method of a data transmission sub system based on two stages of check codes. The troubleshooting system of the data transmission sub system based on the two stages of check codes comprises a data processor, a solid-state memory, a modulator, a solid-state amplifier and ground receiving equipment. The solid-state memory and the modulator are both connected with the data processor, the solid-state amplifier is connected with the modulator, and the ground receiving equipment is connected with the solid-state amplifier. The data processor comprises an AOS framing module, a channel coding module, the first stage of CRC check code and the second stage of CRC check code. By means of the troubleshooting system and method of the data transmission sub system based on the two stages of check codes, additional ground equipment is needless, the implementation mode is simple and easy, and thus error code occurring links can be positioned conveniently and rapidly.

The invention provides a high-peak power pulse thulium-doped laser, which comprises a thulium-doped fiber seed laser for outputting thulium-doped pulse seed laser, a first fiber amplifier for carrying out power pre-amplification on the thulium-doped pulse seed laser and outputting the thulium-doped laser after power pre-amplification to a frequency selector, the frequency selector for reducing a repetition frequency of the thulium-doped laser after power pre-amplification or selecting a proper repetition frequency, a second fiber amplifier for carrying out power pre-amplification again on the thulium-doped laser after frequency selection to meet requirements of a thulium-doped solid state amplifier, and the thulium-doped solid state amplifier for carrying out power amplification on the thulium-doped laser after power pre-amplification again and outputting the amplified thulium-doped laser. The high-peak power pulse thulium-doped laser adopts an amplification structure which combines the fiber and the solid to carry out power amplification on the thulium-doped laser, and thus the peak power and the average power of a 2-micrometer band pulse thulium-doped laser can be effectively improved.

A laser light-source apparatus includes a control unit configured to perform control in such a manner that a seed light source is driven in a pulse oscillation mode of oscillating pulse light based on gain switching in an output permitted state where output of pulse light from the apparatus is permitted, and is driven in a continuous oscillation mode of oscillating continuous light in an output stopped state in which the output of the pulse light from the apparatus is stopped, with power of excitation light for a solid state amplifier maintained, and adjusts power of laser light input to the solid state amplifier from the seed light source in the continuous oscillation mode in such a manner that the solid state amplifier outputs light with substantially same average power in the output stopped state and in the output permitted state.

A microwave transmitter circuit including a divider series feed signal line, collector series feed signal line, a plurality of parallel solid state amplifier coupler circuits connected between the divider series feed line and the collector series feed line, and phase shifting circuitry distributed along the collector series feed line for compensating phase tracking error between the divider series feed line and the collector series feed line.

The invention discloses an elastic wave phase-controlled transmitting and retrosynthetic receiving method, and belongs to the field of geological exploration. The method involves a transmitting part and a receiving part; the transmitting part comprises a slot wave analyzer, a solid-state amplifier, a power dividing module, a plurality of transmitting path program-controlled phase shifters and a plurality of elastic wave transmitting antennas; and the receiving part comprises a plurality of elastic wave receiving antennas, a plurality of receiving path program-controlled phase shifters and a vector module. According to the method, a phase-controlled transmitting technology is used for converting single-pulse modulation carrier transmitting signals subjected to pre-emphasis and power division processing into elastic waves containing detection information through the elastic wave transmitting antennas, and the elastic waves are coupled to a target stratum channel to be transmitted; and aretrosynthetic receiving technology is used for receiving the elastic waves of different paths, propagated by the ground and reflected by all interfaces, through the elastic wave receiving antennas, parameters of a plurality of slot wave echo signals are fused, and a modulation function of a geological structure to the slot wave signals with different frequencies is synthesized, so that the precision of slot wave analysis is improved, and relatively high geological structure detection resolution is obtained.

The invention provides a layout-optimized manned lunar vehicle. The layout optimized manned lunar vehicle has at least advantages that the working spaces of external instruments and devices are fully considered and free of interference and shielding; an X-frequency-band high-gain planer emission surface antenna and a front end box cover of the lunar vehicle are integrally designed; internal apparatuses and devices are arranged in closed box bodies of a front chassis and a rear chassis, and therefore, the requirement on temperature control during working at moonlit day and sleeping at moonlit night can be met; a combined navigation system composed of a barrier avoiding camera and an inertia assembly has the active navigation function and lunar surface relative positioning function; a duplexer ensures synchronous and normal working of the emission end and the receiving end; an X-frequency-band solid-state amplifier and an X-frequency-band responder perform mutual backup for an X-frequency-band high gain planer reflector antenna amplifier and an X-frequency-band high gain planer reflector antenna responder; the working space is fully considered during effective load layout; a panorama camera and an infrared imaging spectrograph achieve large-angle pitching and deflection, and therefore, the observing range is expanded.

The invention provides a dual-system transmitter applied to a ship navigation radar. In a near-zone blind scanning mode, continuous wave excitation signals are amplified by a solid-state amplifier and are conducted selectively by a switch and a high-power switch so that the amplified signals are transmitted to a transmitting antenna, and at the moment, an adjustable attenuator in the solid-state amplifier is in an unattenuated operation state; in a remote detection mode, pulse signals are amplified by the solid-state amplifier, are selected by the switch as input signals of an electric vacuum power amplifier and are amplified to 80 dBm, the amplified signals are transmitted to the antenna through selection by the high-power switch, and power of the pulse signals is attenuated to 10-20 dBm by an adjustable attenuator in the solid-state amplifier; an integrated circuit regulator controls excitation of the solid-state amplifier and the electric vacuum power amplifier. The dual-system transmitter can provide continuous wave system transmissions on the basis of an existing high-power pulse system, can be applied to remote detection and close-range blind zone compensation and is of great significance to the technical development of the ship navigation radar.

The invention relates to an electron source device for an ultrafast electron diffraction and ultrafast electron microscope. The electron source device comprises a low-power microwave signal source, a phase shifter, a solid amplifier, a klystron, an attenuator and a current circulator, wherein the first phase shifter, the solid amplifier and the klystron are sequentially arranged in the direction along microwave signals output by the low-power microwave signal source, the output end of the klystron is connected with the input end of the power distributor, megawatt level microwave signals output by the klystron are divided into two paths by the power distributor, the first path of microwave signals are input into a cavity 1.5 arranged at the front part of an electron gun sequentially through the first attenuator and the current circulator, and the second path of microwave signals are input into a single cavity arranged at the back part of the electron gun sequentially through the second attenuator and the second phase shifter. The electron source device has the advantages that the beam current divergence degree is inhibited from 10<-3> to a value below 10<-5>, and the space resolution of the ultrafast electron diffraction is improved.

A solid state detection system includes a degenerate photo-parametric amplifier (PPA), wherein the PPA comprises a photo diode, and a periodically pulsed light source, wherein the photo-parametric amplifier (PPA) is synchronized to the pulsed light source with a phase locked loop that generates a pump waveform for the PPA at twice the frequency of the excitation pulse rate.