88 results about "Carrier-envelope phase" patented technology

The invention relates to a self-adaptive double-light-comb spectrum system. The system includes two pulse lasers, one or two continuous lasers, and optical beat frequency modules which are used for detecting beat frequency signals generated from any combination of the pulse lasers and the continuous lasers. One path of the beat frequency signals are directly sent to a circuit processing module, and the other path passes through filters for smoothing and is sent to frequency counting. The counted number is compared with a set value. A control signal is output to a frequency slow feedback module. Working parameters of the continuous lasers are adjusted to enable the obtained beat frequency signals to work in a defined range. The circuit processing module carries out circuit treatment including smoothing, frequency mixing, and frequency doubling on the beat frequency signals in order to extract a compensating signal representing double-light-comb repetition frequency and carrier envelope phase jitter. Frequency counting and slow feedback are adopted to control drift of the beat frequency signals of pulsed light and continuous light in self-adaptive double-light-comb spectrum measurement to be in a certain frequency range. It is ensured that the beat frequency signals can stably exist for a long time, thereby improving stability of the self-adaptive double-light-comb spectrum system.

The invention relates to a wideband optical parametric chirped pulse amplification (OPCPA) laser system with a stable carrier envelope phase. The laser system comprises a femtosecond laser device with an output wavelength of 1550nm, a spectroscope, a signal light generator, a stretcher, an angular disperser, a photonic crystal fiber frequency converter, a regenerative amplifier, multi-level Nd: yttrium aluminum garnet (YAG) amplifier, a reflection mirror, an optical parametric amplifier and a compressor. The wideband optical parametric chirped pulse amplification laser system is characterized in that a wideband signal light generated by difference frequency action has a high circular error probable (CEP) stability and a tunable characteristic of the wideband; the signal light and pump light are from the same laser device; under a condition of ignoring the environment jitter influence, the high-precision time synchronization with 10-femtosecond between a signal light pulse and a pump light pulse can be ensured, and the invention has a good frequency stabilization effect; OPCPA of the wideband is realized by means of the angular disperser, and an intermediate infrared tunable laser source is obtained.

An opto-electronic device (100) for processing optical and electric pulses includes a photoconductor device (10) with a sensor section (11) which is made of a band gap material and which has electrical sensor contacts (12, 13), and a signal processing device (20) which is connected with the sensor contacts (12, 13), wherein the photoconductor device (10) is adapted to create a photocurrent between the sensor contacts (12, 13) in response to an irradiation with ultra-short driving laser pulses (1) having a photon energy smaller than the energy band gap of the band gap material, having a non-zero electric field component (3) oriented parallel with a line (4) between the electrical sensor contacts (12, 13), and causing a charge carrier displacement in the band gap material, and wherein the signal processing device (20) is configured for an output of an electric signal being characteristic for at least one of carrier-envelope phase (CE phase), intensity, temporal properties, spectral intensity and spectral phase of the driving laser pulses (1). Furthermore, a laser source device including the opto-electronic device and pulse processing method for processing optical and electric pulses are described.

Apparatus for stabilizing carrier-envelope phase (CEP) of laser pulse generated by mode locked pulsed laser based on direct locking method includes laser oscillator, interferometer, detector and double feedback circuit. The laser oscillator includes the mode locked pulsed laser generating the laser pulse. The interferometer generates laser pulses having first and second frequency components from the laser pulse generated by the mode locked pulsed laser to generate first and second interference signals that substantially correspond to each other in time domain and space domain. The detector receives the first and second interference signals to output third and fourth interference signals by inverting phase of the second interference signal. The double feedback circuit controls the laser oscillator so that the CEP of the laser pulse generated by the mode locked pulsed laser has substantially constant value with respect to time using CEP signal obtained from the third and fourth interference signals.

The invention provides a detection apparatus of carrier envelope phase signals. The detection apparatus is characterized by comprising a pulse oscillator, a fiber amplifier, a spectrum spread device and a collinear type self-reference f-2f carrier envelope phase detection module which are successively connected through an optical path, wherein the collinear type self-reference f-2f carrier envelope phase detection module comprises multiple lenses, a PPLN crystal, a YV04 crystal and a photoelectric detector which are connected through an optical path, the lens is used for converting fiber light output by the spectrum spread device into space light, the YV04 crystal is used for introducing time-delay amounts of fundamental frequency light and frequency multiplication light, and the YV04 crystal is internally of an oblique cleft structure whose left portion and right portion can be vertically adjusted. Femtosecond pulses are injected into high-nonlinearity fibers for generating needed long-wave signals and short-wave signals, phase delays of long-wave signal pulses and short-wave signal pulses are optimized through polarization dispersion and envelope velocity dispersion of the YV04 crystal, and compared to a method of modifying a time-delay amount by use of space light path adjustment in a conventional apparatus, the accuracy is greatly improved.

An ultrashort pulse carrier-envelope phase detection device comprises an ultrashort pulse laser of a fixed repetition frequency, a michelson interferometer, an optical beam splitter, a first optical filter, a first photoelectric detector, a first electrical frequency doubling unit, a second optical filter, a second photoelectric detector, a second electrical frequency doubling unit, and an electrical frequency mixing and filtering unit. The ultrashort pulse laser, the michelson interferometer and the optical beam splitter are in light path connection in order. The first optical filter, the first photoelectric detector, and the first electrical frequency doubling unit with a multiple of (p-1) are connected with a first output end of the optical beam splitter. The second optical filter, the second photoelectric detector, and the second electrical frequency doubling unit with a multiple of p are connected with a second output end of the optical beam splitter. The electrical frequency mixing and filtering unit is connected with output ends of the first electrical frequency doubling unit and the second electrical frequency doubling unit. The modes of time domain time delay and frequency domain selection are adopted, front and back pulses delayed for a certain period are subjected to coherent detection with the michelson interferometer, two different frequency windows are used for frequency domain selection, signals representing carrier-envelope phase jitter are extracted, and measurement of the ultrashort pulse carrier-envelope phase signals are achieved by electrical frequency doubling and frequency mixing processes.

The invention discloses a device and method using pulse accumulation and amplification to realize a high power ultrashort pulse laser. The device comprises a pulse laser beam splitting system, a pulse amplification system, a continuous laser beam splitting system, a carrier envelope phase synchronization system and a balance optical cross-correlation pulse accumulation and amplification system. The method comprises the steps of: splitting the pulse laser into a plurality of paths; respectively amplifying or compressing each path of the laser to obtain a plurality of paths of ultrashort pulses relatively high in power; locking the amplified plurality of paths of ultrashort pulses relatively high in power onto one path by means of frequency beating with a continuous laser device and circuit frequency mixing so as to realize carrier envelope phase synchronization of the plurality of paths of pulse lasers; and finally, performing coherent combination on the plurality of paths of pulse lasers through a balance optical cross-correlation technology, realizing the accumulation and amplification of the plurality of paths of pulse lasers, and outputting the ultrahigh power ultrashort pulses.