12 results about "Soliton pulse" patented technology

A mid-infrared laser generation system based on dispersion-managed soliton bunch pulses. The system can achieve high-power, high-efficiency and high-proportion mid-infrared laser output, and has the advantages of an all-fiber configuration, a compact structure and a high power proportion in a longer-wavelength region of a mid-infrared spectrum. A pulsed fiber laser device generates a nanosecond pulse laser in a 1.5-micron band. A fiber pulse stretcher is made of a single-mode silica fiber, splits nanosecond pulses into a plurality of ultrafast soliton pulses by means of a nonlinear effect, and performs spectral energy conversion from 1.5 microns to 2.4 microns. A fiber laser amplifier further increases the output power of a stretched pulse laser and extends a spectrum to a 2.7-micron band, and also increases pulse energy beyond a 2.3-micron band. A fiber mode field adapter efficiently couples into a nonlinear fiber pulses generated in the fiber laser amplifier. The nonlinear fiber extends a laser to a mid-infrared 3-5-micron band, thereby achieving high-power, high-efficiency and high-proportion mid-infrared laser output.

The invention provides a 2-micron intelligent ultrafast laser spectrum real-time light detection device and method. The 2-micron intelligent ultrafast laser spectrum real-time light detection device comprises a signal source module, a relay amplification module, a detection analysis module and an intelligent algorithm regulation and control module. The signal source module outputs intermediate infrared laser pulses; the relay amplification module realizes signal gain and dispersion broadening; the genetic algorithm sub-module dynamically optimizes transmission parameters such as pumping power and optical fiber length; the convolutional neural network algorithm sub-module carries out real-time feature recognition on the time-frequency signal output by the photoelectric detector and maps a time-domain waveform. And the detection and analysis module is used for intelligently monitoring the time-frequency composite signal. The problem of large intermediate infrared laser long-distance transmission loss is solved through the genetic algorithm, real-time analysis of a soliton pulse fine structure is realized by replacing a traditional spectrometer with the convolutional neural network, and time-frequency synchronous measurement of ultrafast laser in the 2-micron waveband can be completed without a complex test instrument. The system has the characteristics of adaptive parameter adjustment, high measurement precision and strong system expansibility.

The application belongs to the field of fiber lasers, and particularly relates to a soliton pulse interval regulation method based on nonlinear Fourier transform, which comprises sequentially performing intensity normalization and nonlinear Fourier transform on full-field information of multiple soliton pulses to obtain nonlinear spectrum, and extracting each eigenvalue and corresponding discrete spectrum therefrom; identifying the eigenvalue set according to the size of the imaginary part of the eigenvalue to obtain a discrete spectrum set corresponding to the soliton pulse; determining the discrete spectrum corresponding to each soliton pulse according to the intensity size relationship of the multiple soliton pulses; regulating the modulus of the discrete spectrum corresponding to the soliton pulse according to the current interval and the required interval of any two soliton pulses in the time domain to realize the movement of the soliton pulse in the time domain and achieve the required interval; and performing inverse nonlinear Fourier transform on the nonlinear spectrum obtained after regulation to obtain the soliton pulse after interval regulation. The application guarantees the quality of the signal while regulating the interval of the soliton pulse.

The high-energy pure quartic Mamyshev oscillator optical soliton generation system belongs to the technical field of optoelectronic devices, and has the structure that the output end of a seed source (1) is connected with the input end of a Mamyshev oscillator (2), and the output end of a pulse shaping device (3) is connected with the input end of the Mamyshev oscillator (2); the output end of the Mamyshev oscillator (2) is connected with the input end of a pulse expansion module (4), the output end of the pulse expansion module (4) is connected with the input end of an amplifier (5), and the output end of the amplifier (5) is connected with the input end of a compressor (6). The grating, the concave mirror and the spatial light modulator are used to design the pulse shaping device, so that the high-order dispersion of the Mamyshev oscillator is accurately managed, the stable output of the pure quartic soliton pulse is achieved, and the shape of the pure quartic soliton pulse is ensured to remain unchanged while the width of the pure quartic soliton pulse is effectively compressed and the energy of the pure quartic soliton pulse is greatly improved.

The application relates to the field of optical technology and discloses a second-order soliton trap transmission state regulation method based on an optical event horizon simulation, which comprises the following steps: preparing a second-order soliton pulse and an external probe pulse, wherein the second-order soliton pulse is generated through the balance of dispersion and nonlinearity in a nonlinear optical fiber, the external probe pulse is a weak power pulse, the group velocity parameter of the second-order soliton pulse and the external probe pulse is measured, and group velocity matching and group velocity mismatch conditions are set; through accurate setting of the group velocity matching and mismatch conditions and quantitative calculation of the refractive index change caused by the soliton pulse based on the Kerr effect, an equivalent event horizon is defined, definite physical parameter benchmarks and stable potential well environments are provided for transmission state regulation, the stability of a soliton potential well action boundary can be determined and ensured, the transmission state misjudgment problem caused by potential well drift and distortion is overcome, and the accuracy of the regulation process and the predictability of the result are ensured.

The invention discloses a high-energy pure quartic Mmyshev oscillator optical soliton generation system, and belongs to the technical field of optoelectronic equipment. The high-energy pure quartic Mmyshev oscillator optical soliton generation system is structurally characterized in that the output end of a seed source (1) is connected with the input end of a Mmyshev oscillator (2), and the output end of a pulse shaping device (3) is connected with the input end of the Mmyshev oscillator (2); the output end of the Mmyshev oscillator (2) is connected with the input end of the pulse expansion module (4), the output end of the pulse expansion module (4) is connected with the input end of the amplifier (5), and the output end of the amplifier (5) is connected with the input end of the compressor (6). The pulse shaping device is designed by adopting the grating, the concave mirror and the spatial light modulator, so that the high-order dispersion of the Mmyshev oscillator is accurately managed, the stable output of the pure quartic soliton pulse is further achieved, and the shape of the pure quartic soliton pulse is kept unchanged while the width of the pure quartic soliton pulse is effectively compressed and the energy is greatly improved.

The invention provides a space-time soliton order regulation and control method based on a panda type polarization-maintaining photonic crystal fiber resonator, and belongs to the field of photonic crystal fibers and fiber resonators, and the method comprises the steps: introducing two symmetrical boron-doped stress regions into a fiber microstructure cladding, and changing the wire drawing temperature to synchronously regulate and control dispersion and birefringence. The anisotropic torsion panda-shaped polarization-maintaining photonic crystal fiber is prepared by adjusting the wavelength and the torsion period at the same time and used for generating an OAM mode. The panda-type polarization-maintaining photonic crystal fiber is adopted as a nonlinear medium, pure high even order dispersion soliton pulse output and a corresponding broadband optical frequency comb are obtained through polarization control over a pumping source, and output space-time soliton order regulation and control are achieved.

This invention discloses a spatiotemporally pure high even-order dispersion soliton fiber laser and its generation method, belonging to the field of communication technology. It comprises a pump source, a wavelength division multiplexer, a few-mode erbium-ytterbium co-doped fiber, a first photonic lantern, a spectral pulse shaper, a second photonic lantern, a few-mode fiber beam splitter, and a saturable absorber connected sequentially to form a ring optical path. The first photonic lantern decomposes the multimode beam into multiple single-mode beams. The spectral pulse shaper independently applies a phase mask to each single-mode beam, introducing pure high even-order dispersion and compensating for low-order dispersion. The second photonic lantern multiplexes the modulated single-mode beams back into a multimode beam. This invention achieves independent and precise dispersion control of different transverse modes by spatially decoupling the multimode optical field. For the first time, it generates stable soliton pulses dominated by pure high even-order dispersion in a spatiotemporally mode-locked fiber laser, significantly improving pulse energy carrying capacity and providing a new solution for the development of high-energy ultrafast light sources.

The invention provides a multi-soliton pulse output fiber laser transmitter and a radar system, the fiber laser transmitter comprises a seed generation module, the seed generation module comprises a seed pumping source, the seed pumping source is connected with the pumping end of a wavelength division multiplexing device, the signal end of the wavelength division multiplexing device is connected with a nonlinear phase shifter, and the nonlinear phase shifter is connected with a non-linear phase shifter; the common end of the wavelength division multiplexing device is connected with the seed gain optical fiber, the other end of the nonlinear phase shifter and the other end of the seed gain optical fiber are in coupling connection through the output coupler, the output side of the output coupler is connected with the reflection element, and the seed generation module can output seed light of multiple soliton pulses in a passive mode locking mode; a multi-stage amplification module, wherein the multi-stage amplification module comprises a pulse stretcher; the pulse compression module comprises a grating pair; and the frequency doubling module comprises a frequency doubling crystal and can enable the optical fiber laser transmitter to output multiband laser. The problem that in the prior art, the output power of an optical fiber laser transmitter is difficult to improve is solved.

A kind of mid-infrared laser generation system based on dispersion control soliton group pulse, can obtain high-power, high-efficiency, high-occupancy mid-infrared laser output, has the advantages of all-fiber, compact structure, high power occupancy in mid-infrared rear spectrum. The pulsed fiber laser generates nanosecond pulsed laser at 1.5 microns wavelength; the fiber pulse stretcher is a single-mode quartz optical fiber, which splits the nanosecond pulse into multiple ultrafast soliton pulses through nonlinear effect, and performs spectral energy conversion from 1.5 microns to 2.4 microns; the fiber laser amplifier further improves the output power of the stretched pulse laser and expands the spectrum to 2.7 microns wavelength, while improving the pulse energy after 2.3 microns wavelength; the fiber mode field adapter efficiently couples the pulse generated in the fiber laser amplifier into the nonlinear fiber; the nonlinear fiber expands the laser to the mid-infrared 3-5 microns wavelength, and obtains high-power, high-efficiency, high-occupancy mid-infrared laser output.

A photonic-crystal resonator (PhCR) and associated methods of design and manufacture. The PhCR includes spontaneous optical-pulse generation and includes a ring whose geometry is correlated to a mode structure or dispersion of the PhCR while also taking into account a desired type of nonlinear optical output from the PhCR, such as an optical frequency comb, or a particular type of pulse. The PhCR includes a periodic nanopatterning on an inner radial wall of its ring and is able to spontaneously generate a nonlinear optical output. The nanopatterning of the inner radial wall is designed to form a desired output, such as one of a classic soliton pulse that has a sech type temporal profile, or a gaussian profile, or a sink pulse profile.

This invention relates to a high-energy, ultrashort, pure fourth-order soliton fiber laser system based on pulse shaping, belonging to the field of optoelectronic equipment technology. Its structure includes: the output of a seed pulse source (1) connected to the input of a power adjustment module (2); the output of the power adjustment module (2) connected to the input of a polarization pulse segmentation module (3); the output of the polarization pulse segmentation module (3) connected to the input of a polarization pulse synthesis module (4); and the output of the polarization pulse synthesis module (4) connected to the input of a spectral shaping module (5). This invention utilizes a liquid crystal spatial light modulator to design a programmable pulse shaping structure for high-order dispersion management within the fiber laser cavity, achieving pure fourth-order soliton pulse output, which has advantages such as high pulse energy and narrow pulse width.