220 results about "Spectrum shaping" patented technology

A display device capable of early finding a sign such as misregistration or width variation of an emission layer formed by a layer transfer method, and a manufacturing method of the same are provided. In an inspection region 150 outside of an effective region 110, inspection pixels Px2 made up of organic light-emitting elements 10R, 10G and 10B are provided, and a distance W2 between the inspection pixels Px2 on both sides of a color targeted for inspection is shorter than a distance W1 between display pixels Px1 on both sides of the color targeted for inspection. Based on a change in a chromaticity or a spectrum shape of EL or PL light emission of the inspection pixel Px2, a sign such as misregistration of a red-light emission layer 15CR, a green-light emission layer 15CG, is found at an early stage.

According to one embodiment of the invention, an integrated circuit comprises an encoding module, a modulation module and a spectral shaped module. The encoding module includes an interleaver that adapted to operate in a plurality of modes including a first mode and a second mode. The interleaver performs repetitive encoding when placed in the second mode. The modulation module is adapted to compensate for attenuations that are to be realized during propagation of a transmitted signal over the power line. The spectral shaped module is adapted to compensate for amplitude distortion and further compensates for attenuations that will be realized during propagation of the transmitted signal over the power line.

A method for overcoming the drawback in a fiber CPA laser system that includes a process of generating a large negative TOD by implementing an AODS in a pulse shaper as a dispersive component. The AODS is implemented to arbitrarily modulate both the spectrum shape and phase to control with controllable amplitude to generate different orders of dispersions including a large negative TOD for compensating the positive TOD generated by the pulse stretching and amplification processes. The AODS, implemented as a dispersive component, can be an active and controllable dispersive component to generate adjustable levels of dispersions for flexibly compensating any order of dispersions generated in the amplifier chain including the nonlinear phase shift. The AODS implemented as a dispersive component can be an active and programmable dispersive component to interactively generate adjustable levels of dispersions in response to output laser amplitude and pulse shape measurements for flexibly compensating any order of dispersions generated in the amplifier chain including the nonlinear phase shift to achieve the shortest pulse duration.

A green phosphor for emitting light, a spectrum of which is sharp, in an ultraviolet and visible light region, which has higher green light brightness than the conventional rare earth-activated sialon phosphor and has higher durability than the conventional oxide phosphor, is provided. The phosphor being characterized in that Al and a metal element M (here, M is Eu) are incorporated into a crystal of a nitride or oxynitride having a βSi₃N₄ crystal structure as a solid solution, the content of oxygen in the crystal does not exceed 0.8% by mass, and that the phosphor emits a visible light having a luminescence peak wavelength in the range of 450 nm to 650 nm upon exposure to an excitation source is provided. This luminescence spectrum has a sharp spectrum shape. A manufacturing method of the phosphor, a lighting device and an image display device utilizing the phosphor are also provided.

A neutron generator and method of using the same to produce commercial and medical isotopes. Isotopes are transmuted using fission spectrum neutrons produced in neutron multiplier alloys proximate a target isotope. The produced neutron fission spectrum is tailored or shaped by alloys disposed between the multiplier alloys and the target isotope. The tailoring alloys selectively convert the neutron fission spectrum to a nearly coherent distribution of selected high energy, fast, epithermal, or thermal neutrons. The tailoring alloys are engineered to slow the fission spectrum neutrons to the resonance energies of the selected target isotopes through scattering or hydriding of selected components of high temperature aluminum alloys that optimize neutron capture in engineered target alloys.

A Doppler sensitivity measuring unit measures the Doppler sensitivity of Doppler spectrum data obtained by ultrasonic wave transmission/reception with respect to a predetermined region of an object to be examined. A spectrum shape model generating unit generates a spectrum shape model on the basis of a window function used when the above Doppler spectrum data is generated. A threshold setting unit sets a threshold range in which trace waveform data displaces by a predetermined amount in the frequency axis direction on the basis of the spectrum shape model and the Doppler sensitivity, and sets a predetermined number of thresholds at almost equal intervals in the threshold range. A trace data generating unit selects a threshold for the acquisition of desired trace waveform data by generating trace waveform data while sequentially updating the plurality of set thresholds.

The present invention relates to the optical coherent tomographic (OCT) imaging technology. Technologically, the present invention features that longitudinal resolution of OCT is raised through either utilziing dispersive element or blocking element to change the spectrum shape of input light source or utilizing one blocking element to change the spectrum shape of reference arm returned light. The present invention may be used for the OCT system with femoto second-level laser or SLD light source. The method is simple and may be used to raise the longitudinal resolution of OCT system for 20 microsecond to 14 microsecond.

The present invention relates to a chirp pulse amplifying spectrum shaping dielectric film structure reflector, which comprises a transparent substrate, a high reflectance film system, an anaglyph structure and an external protective layer. Wherein, the high reflectance film system is composed of a plurality of staggered dielectric films. A high reflectance film layer and a lower reflectance film layer of the high reflectance film closely contact the anaglyph structure. The anaglyph structure can take a plurality of shapes, such as a micro-lens high transparency film system structure, an air dielectric structure, a glass anaglyph structure or other transparent dielectric structures, including semiconductor structures. As a high-power laser chirp pulse with a plane wave structure vertically casts onto the reflector, the laser passes through the high reflectance film system and the anaglyph structure and all residual lasers are reflected to back of the reflector through the transparent substrate. Reflex intensity distribution is modulated to a needed spectrum distribution structure. The reflector of the present invention can be inserted into any place of an amplifier link and improve capacity to distinguish shaping spectrum chromatic dispersion to a certain level. Scope modulation exceeds 60% without changing phase position, thus adapting to PW devices.

The invention discloses a fiber grating arrays- fiber delay line based light pulse reshaper and a shaping method thereof. The reshaper comprises a amplitude controller composed of a first coupler, a second coupler, a first circulator, a first fiber grating array and a fiber delay line, as well as a phase controller composed of a second circulator and a second fiber grating array, wherein the amplitude controller is used for realizing the functions of selecting wavelength and controlling spectral line amplitude; the phase controller is used for realizing functions of selecting wavelength and controlling spectral line phase; each fiber grating array is composed of an optical fiber bragg grating and a fiber tensioner; all-optical arbitrary waveform output is realized through spectrum shaping of an optical frequency comb; the adjustment for amplitude and phase position of different spectral lines of an input optical frequency comb can be realized through adjusting the fiber tensioners in the two fiber grating arrays, so as to obtain the output of light pulse in required waveforms. According to the invention, collimation control is not required, the structure is simple and the realization is easy.

In accordance with the teachings described herein, systems and methods are provided for a switching mode power supply. In one example, the switching mode power supply may include a transformer, a switching circuit and a switching control circuit. The transformer receives a DC input voltage on a primary winding and generates a DC output voltage on a secondary winding. The switching circuit, which may include a MOSFET switch, is coupled to the transformer and is configured to switch the transformer on and off. The switching control circuit generates a switching control signal to control the switching circuit in order to regulate the DC output voltage of the transformer. The switching control circuit is configured to generate the switching control signal as a function of a timing signal having a varying frequency, wherein the varying frequency of the timing signal causes a switching frequency of the switching circuit to vary over a period of time in order to reduce electromagnetic interference caused by the switching circuit.

It is a light spectrum shaping apparatus and its method, which uses attenuated total reflectance property and electro-optical property of the reflection electro-optical modulator to realize the light spectrum shaping of ultra-short laser impulse. The apparatus comprises the reflection electro-optical modulator, adjustable direct power, tray disc, laser in the incidence light path, polarimeter, the electro-optical detector in the optics hole and reflection light path and optical spectrometer. The reflection electro-optical modulator composed of the prism and four layers of thin films deposited on the prism is fixed in the center of the rotation disc, The organic polymer wave-guiding layer of the modulator has electro-optical effect through corona discharge electrode. Through altering the incidence angle, it selects the attenuated total reflectance curve with matching width of light spectrum with the laser spectrum from the multiple attenuated total reflectance curves and adjusts the voltage exerted between the upper and down electrodes of the modulator of the adjustable direct power to get the ideal shaping spectrum.

The invention relates to a spectral shaping device and a method of a chirp widening laser pulse. The spectral shaping device comprises a mode-locked laser, a raster stretcher, a lens, a pulse sample, an optical fiber splitter, an optical amplifier, a synchronous photoelectric converter, a shaping electrical pulse generator and an integrated guided-wave electro-optical modulator. The invention can perform the spectral pre-shaping of the chirp widening laser pulse before amplification, thus greatly decreasing gain narrowing effect in a chirp pulse amplification system. The spectral shaping device does not need complex light paths and machinery and spectral shape is easy to be changed. In addition, the spectral shaping device has flexible operation and high efficiency and is easy to be embedded into the multi-stage amplification system of the chirp pulse.

An actinium-227 production device having a plurality of metallic or ceramic caplets, each enclosing a radium-226 compound in redundantly nested sealed cylinders. The radium-226 compound is compacted into a disk and diluted with heat transporting ceramic materials. A thermal neutron shield including spectrum shaping materials to protect actinium-227 produced from exposure to thermal neutrons is included along with a strong neutron absorber to shape the neutron spectrum such that radium-226 nuclei are exposed to neutrons in the higher epithermal energy groups upon entry into the target with an energy of between 20 eV and 1 KeV.

System and methods for producing a plurality of Sinc shaped pulses in the time domain include a light source for providing an input light signal having an input frequency, and at least one spectrum shaper for producing the plurality of Sinc shaped pulses from the input light signal. The spectrum shaper may include an amplitude modulator, at least one radio-frequency generator and a bias voltage generator.

The invention provides a high-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband, comprising a beam combiner, a section of YDF (Ytterbium Doped Fiber), an optical isolator, a fiber end cap, a semiconductor pump laser and a section of YDF in certain length. The invention is characterized in that: a light output end only needs to be welded with a small section of YDF in non-pumping state, the secondary absorption effect of the YDF on ASE optical signals is utilized, and an ASE spectrum shape is effectively processed and flatly outputted. An optical path box in which the YDF is wound is arranged on a temperature-controllable simple heating plate, the working temperature of the YDF is adjusted and controlled, the ASE spectrum shape is further outputted flatly, and the ASE light output spectrum bandwidth is effectively improved. Besides, in the non-output direction, the fiber end cap based on small-section multimode fiber grinding and coating manner is welded for restraining the light reflection on the end surface of the fiber, the laser output formed by self-oscillation is avoided, the pumping power is ensured to be improved, and meanwhile, the scale of ASE light output power is effectively improved.