71 results about "Ultrashort pulse" patented technology

The invention provides a laser marking system and method for metal surface dazzling and coloring, and relates to the technical field of metal surface laser precision machining.The system integrates a femtosecond laser, a nanosecond laser, an optical bread board, a lifting platform, an electric rotating slide, a scanning galvanometer, a focusing lens, a computer control system and an adsorption platform; two laser marking processes of colorful marking and coloring marking are innovatively combined; the femtosecond laser device achieves a colorful effect on the metal surface through ultrashort pulses, and the nanosecond laser device generates a colorful effect of various colors through the heat effect. Automatic switching of the two lasers is controlled through the lifting platform, the computer automatically recognizes the drawing and document process type, and multi-color-zone pattern marking is efficiently completed. The system is simple in structure and convenient to operate, can meet the high-precision double-process marking requirement of the metal surface, and is widely applied to the fields of consumer electronics, anti-counterfeiting technologies and the like.

According to the large-depth-diameter-ratio micropore laser rotary-cutting precision machining system and method, light beam self-rotation and light beam scanning are achieved through a compact rotating assembly integrating a Dove prism and double reflectors, the off-axis angle and the off-axis amount are precisely regulated and controlled through deflection and movement of the reflectors, light beams are subjected to off-axis focusing through a focusing assembly, and the precision of laser rotary-cutting precision machining is achieved. Finally, a light path focusing mode of first converging and then off-axis focusing is formed, large-depth-diameter-ratio micropore machining is achieved, the aperture range is dozens of micrometers to several millimeters, and the maximum depth-diameter ratio can reach 15: 1 or above; the device is compact in structure, a complex adjusting system is not needed, the control mode is simple, high rotating speed can be achieved, ultra-short pulse time domain broadening is reduced through the double-reflector system, and machining of hole patterns such as steep straight holes and taper holes can be achieved.

The invention discloses a 2-micron-waveband adjustable all-fiber high-repetition-frequency pulse light source generator, belongs to the technical field of laser light source manufacturing, and aims to solve the problem that an existing 2-micron-waveband passive all-fiber mode-locked pulse laser light source is difficult to give consideration to fs-magnitude narrow pulse width and ultra-short-cavity-length high-fundamental-frequency repetition frequency output. The laser comprises a semiconductor laser pumping source, a wavelength division multiplexer, an extrusion type polarization controller I, a polarization-maintaining highly-doped gain fiber, an extrusion type polarization controller II, a long cone region tapering micro-nano fiber, a 2 * 2 fiber coupler and a fiber Faraday mirror. According to the invention, the long-cone micro-nanofiber is introduced into the cavity, and the long-cone micro-nanofiber has the characteristic of high nonlinear coefficient, so that the cavity length can be greatly shortened, enough nonlinear phase shift can be accumulated, and fs-magnitude ultrashort pulse can be output. The device is low in loss, stable in performance and easy to integrate with other optical fiber systems. The laser can be applied to the fields of optical communication, non-metallic material processing, laser medical treatment, intermediate infrared laser pumping sources and the like.

A pulse light generation device 1 comprises: an oscillator 2 for oscillating an ultrashort pulse light L; a stretcher fiber 7 for widening the time width of the ultrashort pulse light L; a fiber amplifier 8 for amplifying the ultrashort pulse light L the time width of which has been widened by the stretcher fiber 7; and a compressor 9 for compressing the time width of the ultrashort pulse light L which has been amplified by the fiber amplifier 8. The stretcher fiber 7 is configured by combining a first fiber 71 for widening the time width of the ultrashort pulse light L with a first characteristic, and a second fiber 72 for widening the time width of the ultrashort pulse light L with a second characteristic which is different from the first characteristic.

To allow a wavelength variable light source and a wavelength variable method that can tune the wavelength of the output light to reliably amplify the light over a wide wavelength range.SOLUTION: A wavelength variable light source 1 includes an optical output unit that outputs ultrashort pulsed light L and can variably change the wavelength of the output ultrashort pulsed light L, a second fiber amplifier 7 that amplifies the ultrashort pulsed light L output from the optical output unit, a filter 8 that filters the ultrashort pulsed light L amplified by the second fiber amplifier 7, and a third fiber amplifier 9 that amplifies the ultrashort pulsed light L filtered by the filter 8. The second fiber amplifier 7 has a higher gain on the short wavelength side than on the long wavelength side. The third fiber amplifier 9 has a higher gain on the long wavelength side than on the short wavelength side. The filter 8 attenuates the amplified spontaneous emission light.SELECTED DRAWING: Figure 1

The invention relates to the technical field of battery materials, in particular to a method for manufacturing a lithium-loving microstructure on the surface of a copper foil current collector for a metal lithium negative electrode through femtosecond laser additive manufacturing. Based on the characteristics of ultrashort pulse, ultrahigh peak power and high precision of femtosecond laser, the femtosecond laser is focused on the surface of a copper foil current collector coated with a metal salt solution, and the power and repetition frequency of the femtosecond laser are regulated and controlled, so that the metal salt is decomposed into nano metal particles which are locally sintered and fused on the surface of the copper foil current collector; the moving path of the femtosecond laser micro-nano moving table is controlled, the lithium-loving metal microstructure is manufactured on the surface of the copper foil current collector in an additive mode, ordered and compact deposition of metal lithium can be guided, growth of lithium dendrites can be remarkably inhibited, and the reversible capacity and cycling stability of the metal lithium negative electrode can be improved. The method is simple in technological process, high in preparation efficiency and high in repeatability, and wide application prospects are provided for practicability of the high-energy-density metal lithium battery.

The present invention relates to a device for measuring the damage limit of a laser amplification medium and a method for measuring the damage limit. A device for measuring the damage limit of a laser amplification medium according to one embodiment of the present invention may include: an ultrashort pulse generator that generates laser light having an ultrashort pulse; an amplification unit that irradiates the laser light onto a laser amplification medium to amplify the output of the laser light; and a beam measurement unit that generates a beam profile of the laser light output from the amplification unit and measures a damage threshold of the laser amplification medium by utilizing a change in the beam profile according to a Kerr lens phenomenon.

This invention discloses a wavelength-tunable dual-cavity ultrafast fiber laser based on rotating optical fibers and its control method, relating to the field of laser technology. The dual-cavity ultrafast fiber laser of this invention integrates a wavelength division multiplexer within a dual-ring resonant cavity, structurally integrating two wavelength channels, each containing an independent gain fiber, to achieve dual-color soliton output and reduce gain competition. By setting an adjustable rotating fiber filter, consisting of a polarization controller, rotating optical fibers, and a polarization-dependent isolator, in the multiplexing section, the center wavelength of both wavelengths is tunable. Simultaneously, the two sub-cavities share the same saturable absorber to achieve passive synchronous mode-locking, and a delay line is introduced into one of the channels to adjust the equivalent cavity length, achieving repetition frequency matching and timing alignment between the two sub-cavities, thereby obtaining stable, tunable, and synchronous dual-wavelength ultrashort pulse output.

The invention provides a non-Gaussian ultrashort pulse-oriented multi-channel feature inversion method and device, and the method comprises the steps: obtaining a first FROG trace graph, carrying out the multi-channel feature extraction of the first FROG trace graph, and generating a three-channel input feature graph; inputting the three-channel input feature map into an intensity prediction network, outputting a predicted pulse intensity envelope, inputting the first FROG trace map into a phase prediction network, outputting predicted pulse phase distribution, and filtering the predicted pulse intensity envelope and pulse phase distribution to smooth noise; and reconstructing a complex electric field based on the filtered intensity and phase, regenerating to obtain a second FROG trace graph, and calculating an error index between the first FROG trace graph and the second FROG trace graph, the error index comprising an FROG error and an intensity correlation coefficient. According to the invention, the requirement of an advanced ultrafast laser system for high-precision online diagnosis of non-ideal pulses is met, and key technical support is provided for online diagnosis and closed-loop control of the advanced ultrafast laser system.

The application relates to a full-polarization-maintaining fiber femtosecond laser based on a mode-locking starting promotion structure. The laser comprises a nonlinear amplification ring mirror with a double-path gain fiber, can realize continuous adjustment of a phase difference, introduces a nonlinear phase shift related to laser pulse intensity, reduces a mode-locking threshold of the nonlinear amplification ring mirror laser, improves self-starting mode-locking capability of the laser, and outputs high-power and high-stability ultrashort pulses; a non-reciprocal phase shift element introduces a linear phase shift bias for clockwise and counterclockwise propagation pulses; a linear arm introduces an optical element with a dispersion compensation function, ensures compactness of the oscillator, is used for outputting pulses, simultaneously provides seed pulse pre-chirp management for subsequent higher-power amplification, and realizes flat wide spectrum. The laser adopts a full-polarization-maintaining fiber structure, has good self-starting mode-locking characteristics, is beneficial to pulse filtering and shaping, and simultaneously has the advantages of compact structure, good stability, high damage threshold, high output power and low noise.

The electrode sheet punching device includes a laser processing table (110), a laser cutting machine (120), and a flaw detection module (130). The laser processing table (110) is located below the electrode sheet (200) and has a plurality of suction holes (111) that can suck and fix the electrode sheet (200) to the surface of the laser processing table (110). The laser cutting machine (120) is located facing the laser processing table (110) and emits ultrashort pulsed ultraviolet light toward the electrode sheet (200) to cut the electrode sheet (200). The flaw detection module (130) is located downstream of the laser cutting machine (120) along the flow path of the electrode sheet (200) and is used to detect the appearance of the electrode sheet (200) cut by the laser cutting machine (120). This embodiment prevents the electrode sheet (200) from moving and shifting, and also prevents dimensional fluctuations due to deformation of the electrode sheet (200) itself, thereby ensuring stable and high cutting quality for the electrode sheet (200). Furthermore, by using ultrashort pulse ultraviolet light to cut the electrode sheet (200), low-temperature processing of the electrode sheet (200) is achieved, preventing deformation and carbonization of the polymer layer of the composite current collector due to high cutting temperatures, and achieving higher cutting quality.

The invention discloses a dual-wavelength femtosecond laser direct-writing miniaturized precursor ceramic high-temperature thin film sensor, and relates to the technical field of high-temperature thin film sensor manufacturing. Depositing the precursor functional slurry on the surface of a substrate layer by layer by adopting additive manufacturing processes such as blade coating, direct writing and the like, and performing pyrolysis to form an amorphous ceramic multilayer film; based on a dual-wavelength femtosecond laser micro-nano processing platform, the device comprises 1035nm / 343nm double light sources, a light path transmission system and a motion platform, and the characteristics of femtosecond laser ultrashort pulse and high peak power density are utilized to realize submicron precision graphical processing of a precursor ceramic film. And the area of the high-temperature film sensor unit is reduced from the square millimeter level of the traditional process to the square micron level. The method has the advantages of dual-wavelength laser collaborative processing, multi-layer film compatibility and the like, overcomes the disadvantages of large size and poor forming precision of a traditional additive manufacturing precursor ceramic film sensor, and provides a new normal form for integrated manufacturing of a micro sensor array serving in an extreme environment.

The application relates to the field of optical information technology, and particularly relates to a high-energy thulium-doped fiber laser based on self-locking mode and dispersion management technology, wherein a pump laser is connected with one end of a pump protector, the other end of the pump protector is connected with an a end of a wavelength division multiplexer, a b end and a c end of the wavelength division multiplexer are respectively connected with an i end of a three-port circulator and one end of a thulium-doped gain fiber, the other end of the thulium-doped gain fiber is connected with a d end of an optical coupler, an e end of the optical coupler is connected with one end of a polarization controller, the other end of the polarization controller is connected with one end of a single-mode optical fiber, the other end of the single-mode optical fiber is connected with a g end of the three-port circulator, an h end of the three-port circulator is connected with one end of a collimator, and the other end of the collimator is provided with a dispersion compensation assembly, high-energy ultrashort pulses can be generated, the structure is optimized, and the manufacturing cost is reduced.

The invention discloses an ultrashort pulse dynamic regulation and control device and method based on double acousto-optic deflectors, and belongs to the technical field related to laser. The device comprises an acousto-optic deflector group and a 4f optical system, the 4f optical system is formed by biconvex lenses with two times of focal length, and the optical axis is parallel to the horizontal plane; the 4f optical system changes the positive and negative of the symbols of acousto-optic effect group delay dispersion and improves the range of group delay dispersion; the acousto-optic deflector group is composed of two acousto-optic deflectors which are arranged in parallel and in opposite directions, and the two acousto-optic deflectors are located on the two sides of the 4f optical system respectively and are both perpendicular to the optical axis. First polarized light of an input light beam is converted into second polarized light through the first acousto-optic deflector, the second polarized light is converted into first polarized parallel light beams through the 4f optical system and the second acousto-optic deflector, and an output light beam is obtained. The acousto-optic deflector group provides continuously adjustable group delay dispersion and regulates and controls the pulse width of an output light beam. The device is low in cost, is simple to operate, and dynamically regulates and controls the pulse width of the output light beam.

The invention belongs to the technical field of ultra-short pulse wavelength real-time regulation and control methods, and particularly relates to an ultra-short pulse wavelength real-time regulation and control system and method based on phase modulation, and the system is composed of a pulse light source, a polarization controller, a signal generator and a phase modulator. The pulse light source is used for providing an ultrashort pulse sequence with stable repetition frequency, the polarization controller is used for adjusting the polarization state of pulses, the signal generator is used for generating radio frequency electric signals, and the phase modulator is used for changing the phase distribution of the pulses under the driving of the radio frequency electric signals to cause pulse light frequency shift. Therefore, the real-time and rapid regulation and control of the spectral wavelength can be realized. According to the invention, real-time and rapid regulation and control of the ultrashort pulse wavelength can be realized, the operation is simple and flexible, and the method has important application value in the fields of optical communication and the like.

This invention discloses a neutron analysis physics testing system and method, belonging to the field of nuclear physics testing technology. The system includes: a high-speed synchronous pulse generator for generating pulse signals with multiple modulation sequences; an ultrashort pulse neutron generator for emitting short pulse neutron rays with specified parameters onto a sample; a neutron detector for acquiring secondary neutron signals; a gamma detector for acquiring characteristic gamma signals generated by neutron-excited probes of the sample; a safety control module for controlling the operating state of the ultrashort pulse neutron generator; and a data processing device for real-time collection and summarization of neutron signals and characteristic gamma signals based on the timing of the pulse signals with multiple modulation sequences. This system reduces time window drift and measurement errors, and activates the ultrashort pulse neutron generator only when a gate signal allows, improving the accuracy, safety, and stability of geological physics parameter measurements.

A real-time vector analysis method for detecting an optical signal with a bandwidth greater than 1 THz includes: mapping, by a time-lens focusing system, a spectrum of a signal under test to different temporal location information; obtaining, by fully broadening an ultrashort pulse by a dispersion, a time domain spectrum of the ultrashort pulse to form a chirped swept frequency source; inputting an out of the signal under test after passing through the time-lens and the chirped swept frequency source to a coherent receiver to realize an interference process and a conversion of an optical signal to an electrical signal, and recovering an intensity information and a phase information of frequency domain of the signal under test from the electrical signal by data acquisition and processing; then recovering a full-field information of time domain of the signal under test by a Fourier inverse transform.

The application discloses a kind of based on ultrafast laser liquid area impact regulation and control's molten pool pore inhibition method, belong to additive manufacturing and welding technical field.The method first establishes the three-dimensional space coordinates of ultrafast laser focus and molten pool liquid area servo correlation;After dynamic molten pool is formed by heat source, ultrafast laser is accurately focused in the molten pool liquid area pore prone position, and plasma shock wave induced by ultrafast laser ultrashort pulse acts on liquid metal.The method breaks through the inherent convection state of molten pool by shock wave and increases local flow rate, while high-frequency impact shears large-volume bubble into micro-nano bubble, and promotes micro-nano bubble collision and rapid floating, realizes the multi-mechanism synergistic exhaust of active interference-flow field-large bubble shear crushing-micro-nano bubble merging and floating, and completely drives away bubble from molten pool liquid area before solidification front arrives.The application significantly improves the density and mechanical properties of formed piece and welded joint.

An optoelectronic oscillator (100) and a signal processing method, which relate to the technical field of optoelectronics. In the optoelectronic oscillator (100), an electro-optical modulator (110), an optoelectronic detector (120), a first filter (130) and a power divider (140) form an optoelectronic oscillation loop. Compared with a conventional single-passband filter, the first filter (130) in the optoelectronic oscillation loop has an additional low-frequency passband, and thus can excite a pulse train of the low-frequency passband and a pulse train of a bandpass band in the optoelectronic oscillation loop. Since the oscillation of a pulse signal can automatically narrow a pulse train to form an ultrashort pulse train, when the pulse train excited by the bandpass band has undergone pulse narrowing by means of an oscillation mechanism in the optoelectronic oscillation loop, the pulse train excited by the low-frequency passband may further undergo pulse narrowing, such that the optoelectronic oscillator (100) can generate a microwave pulse train which is shorter than that of a conventional optoelectronic oscillator, that is, an ultrashort microwave pulse train.

The invention discloses a uranium mine logging instrument based on ultrashort pulse neutrons and a working method thereof, and relates to the field of uranium mine exploration logging. The logging instrument comprises a control communication short section, an ultrashort pulse neutron generator used for emitting fast neutron pulses with the pulse width smaller than 1 microsecond to a stratum, a shielding body and a double-thermal-neutron detection assembly used for detecting thermal neutrons and epithermal neutrons on measuring points consistent in space, all of which are sequentially arranged in the axial direction of the logging instrument. The gamma detector is used for detecting inelastic scattering gamma rays emitted by stratum elements and capturing gamma rays, and the fast neutron detector is used for detecting and outputting source intensity monitoring signals of fast neutron pulses in real time. According to the logging instrument, the ultra-short fast neutron pulse is emitted, the neutron yield is detected in real time, the neutron time spectrum and gamma-ray energy spectrum multi-dimensional information with an accurate timestamp are obtained in a combined mode, high-precision and anti-interference inversion is conducted on the stratum uranium content, and stratum information is obtained efficiently and accurately.

The invention discloses an ultra-short pulse optical parametric oscillator based on a bicrystal structure, and relates to a laser and an assembly, and the oscillator comprises a first beam shaper (2) which is used for shaping idler frequency light (1); a second beam shaper (4) for shaping the pump light (3); a dichroscope (5); the first nonlinear crystal (6) is arranged on a light emitting path of the dichroscope (5), and the first nonlinear crystal (6) is used as an input coupling mirror of the optical parametric oscillator; the second nonlinear crystal (7) is arranged on a light emitting path of the first nonlinear crystal (6), and the first nonlinear crystal (6) and the second nonlinear crystal (7) form a resonant cavity; and the three-direction color mirror (9) is arranged on a light emitting path of the second nonlinear crystal (7) and is used for separating the pump light, the signal light (8) generated by nonlinear frequency conversion and the amplified idle frequency light (1) and transmitting and outputting the idle frequency light. The conversion efficiency of the optical parameter amplification process is improved, and the overall amplification performance of the optical parameter amplifier is guaranteed.

A mode-locked semiconductor laser oscillator configured to emit laser pulses. The oscillator comprises a large area diode supporting multiple spatial modes. The diode is configured to emit a multi-mode light beam. The oscillator also comprises a multi-mode saturable absorber configured to absorb a portion of the multi-mode light beam and to convert the multi-mode light beam into a train of ultrashort optical pulses. The oscillator also comprises an external laser cavity surrounding the diode and the saturable absorber, the external laser cavity is configured to filter the multi- mode light beam such that only a single-mode light beam is reflected back towards the multi-mode diode and allowed to oscillate in the external laser cavity. The laser pulses are emitted via the external laser cavity.

The invention belongs to the technical field of lasers, and particularly relates to a dynamic dispersion compensation system and method for an intermediate infrared tunable fiber laser, and the system comprises an intermediate infrared ultrashort pulse light source mechanism which is used for outputting negative chirped pulse laser with the wave band of 2.8-4.5 microns; the pulse compression module comprises a transmission grating I and a transmission grating II which are arranged in parallel, an aberration removal structure positioned between the transmission grating I and the transmission grating II, and a roof prism; the negative chirped pulse laser sequentially passes through the first transmission grating, the aberration removing structure and the second transmission grating and then enters the ridge prism, and the negative chirped pulse laser is reflected by the ridge prism to enable the light to sequentially pass through the second transmission grating, the aberration removing structure and the first transmission grating and then outputs near Fourier transform limit pulsed light. The distance between the plane where the first transmission grating is located and the plane where the second transmission grating is located is the grating distance. And the grating distance is adjusted through the distance adjusting part. According to the invention, dynamic dispersion compensation of the mid-infrared band can be realized.

A device for the generation of ultrashort pulses, wherein an oscillator is formed by: a first and a second non-overlapping transmission band-pass filter, which can serve as reflecting end element of the oscillator; optically transparent means with non-linear Kerr coefficient χ(3) different from zero configured to achieve a spectral broadening by self-phase modulation of the signal transiting through these means; an optical waveguide that produces a positive gain; a node configured to receive a trigger signal designed to activate the operation of the oscillator; a trigger signal generating device comprising: a laser source, for example a microchip, configured to generate a laser pulse, preferably with a minimum bandwidth, having a duration of hundreds of ps, up to the ns; a coupling system designed to introduce the pulse of the trigger laser into a waveguide made of an optically transparent material characterised by a non-linear Kerr coefficient χ(3) different from zero, which is configured to produce two distinct effects in order to spectrally broaden the pulse of the trigger laser, and precisely: a) self-phase modulation four-wave mixing; the output of the waveguide supplies the trigger signal to the node. The pulses produced by the oscillator typically have a duration of the order of the picosecond and are easily reduced to the Fourier limit of circa 100 femtoseconds by means of a dispersive device.

The application discloses a graphene-coated surface saturable absorber device of a multimode optical fiber with an internal microstructure, which adopts a mixed structure of graphene and a graded-index multimode optical fiber. The saturable absorber device comprises a first single-mode optical fiber, a mixed structure based on a multimode optical fiber, and a second single-mode optical fiber. The mixed structure based on the multimode optical fiber is composed of a tapered graded-index multimode optical fiber with an internal microstructure and a single-layer graphene film. The graded-index multimode optical fiber is first subjected to a micro-tapering treatment, then a microstructure is inscribed in the core inside the taper waist, then the graphene film is coated on the surface of the taper waist of the optical fiber, and finally the single-mode optical fibers are fused at both ends of the multimode optical fiber. The saturable absorber combines the nonlinear multimode interference effect in the multimode optical fiber and the saturable absorption characteristics of graphene, can perform secondary compression on the pulse width of a high-energy pulse, and thus obtains an ultrashort pulse. The application has the advantages of a solid structure, strong stability, a high damage threshold and the like, and provides an effective technical means for obtaining a stable ultrashort pulse mode locking.

Systems and methods for optical matrix multiplication are disclosed. An optical matrix multiplier includes an optical source configured to produce a sequence of optical pulses based on an input vector. The multiplier further includes a fanout module configured to receive a sequence of optical pulses and produce multiple optical pulse sequences. The multiplier further includes multiple delay lines, each delay line configured to apply a delay to an associated one of the optical pulse sequences. The multiplier further includes multiple modulators, each modulator configured to modulate one of the delayed optical pulse sequences. The multiplier further includes at least one accumulator configured to sum at least one modulated optical pulse sequence.

The invention provides an optical fiber oscillator and a homologous synchronous double-color optical fiber ultrafast seed source device and method thereof. The optical fiber oscillator, the homologous synchronous double-color optical fiber ultrafast seed source device and the homologous synchronous double-color optical fiber ultrafast seed source method can reduce system complexity and dependence on external active synchronous control, hopefully improve the synchronization precision of double-color ultrashort pulses to a sub-femtosecond magnitude, can realize a wider wavelength coverage range, reduce dependence on an external control system, and improve the synchronization precision of the double-color ultrashort pulses to the sub-femtosecond magnitude. And the laser can be applied to the fields with high requirements such as high-power laser output and long-distance laser communication.

A microscope apparatus comprises an array unit on which a sample is mounted; a beam irradiation unit for irradiating the sample mounted on the array unit with a focused ion beam; a laser output unit for emitting laser light with ultrashort pulses; a laser irradiation unit for irradiating the sample mounted on the array unit with the laser light emitted by the laser output unit; and a microscope unit for viewing the sample mounted on the array unit. The laser irradiation unit includes a spatial light modulator for modulating the laser light emitted by the laser output unit and for emitting the modulated laser light, as well as a scanning unit for irradiating the sample mounted on the array unit with the laser light emitted by the spatial light modulator while scanning the sample.

The utility model discloses a carrier envelope phase measuring device of an ultra-short pulse sequence, which comprises an ultra-short pulse light source, a beam splitting unit arranged on one side of the ultra-short pulse light source, a spectrograph arranged on one side of the beam splitting unit far away from the ultra-short pulse light source, a control unit arranged on one side of the beam splitting unit, and the spectrograph connected with the control unit. The control unit is connected with a piezoelectric transducer, and an interference adjusting unit is arranged on one side of the piezoelectric transducer. According to the utility model, high-precision measurement of the ultra-short pulse sequence CEP is realized, optical elements such as the beam splitter, the reflector and the piezoelectric converter are utilized, and the self-adaptive feedback control unit is combined, so that an optical path can be adjusted in real time to maintain the stability of interference fringes, and accurate phase information is obtained through the spectrograph and the CCD detector.