33results about How to "Short pulse" patented technology

A method for repairing process-related damage of a dielectric film includes: (i) adsorbing a first gas containing silicon on a surface of the damaged dielectric film without depositing a film in the absence of reactive species, (ii) adsorbing a second gas containing silicon on a surface of the dielectric film, followed by applying reactive species to the surface of the dielectric film, to form a monolayer film thereon, and (iii) repeating step (ii). The duration of exposing the surface to the first gas in step (i) is longer than the duration of exposing the surface to the second gas in step (ii).

A master oscillator power amplifier (MOPA) system includes an oscillator having a neodymium-doped gadolinium vanadate gain-medium and delivering seed-pulses. A length of single mode fiber is used to broaden the spectrum of the seed pulse. An amplifier having a neodymium-doped yttrium vanadate gain-medium amplifies the spectrally broadened seed-pulses. The gain-spectrum of the amplifier partially overlaps the broadened pulse-spectrum, providing spectral selection of the seed-pulses in addition to amplification. This provides amplified output-pulses having a duration about one-third that of the corresponding seed-pulses.

Provided is a light emitting device which can achieve short pulsing of light that the device outputs. This light emitting device (100) includes: a capacitor (10); one or more solid state light emitting elements (20) that emit light by having power supplied from the capacitor (10); and a semiconductor switch (30) that controls the supply of power from the capacitor (10) to the solid state light emitting elements (20). The capacitor (10) has a connection electrode (32) which has the solid state light emitting elements (20) mounted on an outer surface thereof, has the semiconductor switch (30) mounted on the outer surface thereof or provided therein, and is for connecting the solid state light emitting elements (20) to the semiconductor switch (30) in series between external electrodes (11),(12).

This document describes an adaptive bitrate streaming method allowing streaming an audio video (AV) content to a client device using a multi content delivery network (CDN) approach. Each CDN stores multiple versions of a content that can be requested in the form of a succession of consecutive files using HTTP requests. The method is based on a use of an intermediate module, called diversity module, between an AV player of the client device and each CDN of a plurality of CDN. For each file of a version of a content requested by the AV player, the diversity module requests a manifest file to each CDN and estimates a bitrate of each CDN using reception performances of the manifest files. Each file is requested by the diversity module in the form of a succession of groups of segments structured according to a pattern comprising a predetermined number of segments. Each group comprises one set of segments for each CDN, each set comprising a number of segments intended to be requested to the CDN to which they correspond proportional to the bitrate of this CDN.

A resonant DC-DC converter for generating high voltage MHz bi-polar DC pulses includes a left multi-level resonant rectifier bank [100] connected to a positive electrode [104] and coupled via capacitive isolation to a left RF amplifier terminal [128]; a right multi-level resonant rectifier bank [102] connected to a negative electrode [106] and coupled via capacitive isolation to a right RF amplifier terminal [130]. Each multi-level resonant rectifier bank comprises multiple resonant rectifier stages [112-122], where each stage comprises two capacitors for capacitively isolating the stage, an output capacitor, a MOSFET switch connected to an adjacent MOSFET switch of an adjacent stage, and a gating resonant circuit connected to the MOSFET switch, whereby MOSFET switches in the banks can be passively controlled by RF signals from a left RF amplifier and a right RF amplifier.

The invention discloses a negative dispersion pulse widening optical fiber amplifying device, which comprises a mode-locked laser, a negative dispersion unit, a primary amplifying unit, a secondary amplifying unit and an output unit, wherein the mode-locked laser generates seed light pulse; the negative dispersion unit is arranged at the emergent side of the seed light pulse of the mode-locked laser to widen the seed light pulse and enable the seed light pulse to have negative chirp; the primary amplifying unit receives the seed light pulse with the negative chirp, which is output by the negative dispersion unit, carries out primary amplification, and further carries out positive dispersion compensation on the negative chirp in the seed light pulse to shorten the seed light pulse; the secondary amplifying unit receives the seed light pulse output by the primary amplifying unit, carries out secondary amplification, and further carries out positive dispersion compensation on the negative chirp in the seed light pulse to shorten the seed light pulse; and the output unit is connected with the secondary amplifying unit and outputs the amplified seed light pulse. The invention makes thepulse of the output end of the optical fiber amplifier shortest via the negative dispersion widening, simplifies the system, reduces the loss, increases the pulse energy after the amplifier, and effectively reduces the cost.

The invention discloses a novel time hopping-pulse position keying and telemetering method, and belongs to the field of wireless measurement and control communication. The multiple access communication of a PPK (pulse position key) telemetering system can be realized by adopting a time hopping frequency-spreading technique; and a receiving end completes the multiuser detection in a matched filtering mode. The method disclosed by the invention is safe, secret, anti-jamming, and strong in anti-intercepting capacity, and has the multiple access communication capacity.