39 results about "Picosecond pulse" patented technology

The invention discloses a method and a device for outputting large-energy picosecond pulse laser with external synchronization picosecond-level jitter. The device comprises a high-precision time sequence controller, a semiconductor picosecond pulse seed source, an optical isolator and a high-gain and high-stability regenerative amplifier. The semiconductor picosecond pulse seed source outputs low-energy picosecond-level (10-12J, pJ) and low-jitter picosecond-level (10-12s, ps) picosecond pulse seeds under the trigger of a time sequence controller of a high-precision external clock, the picosecond pulse seeds enter the high-gain high-stability regenerative amplifier through the optical isolator, and the high-gain high-stability regenerative amplifier outputs high-energy picosecond-level (10-12s, ps) picosecond pulse seeds under the control and adjustment of the high-precision time sequence controller. The picosecond pulse seed is locked to be regenerated and amplified in the regenerative amplifier, and the energy of the picosecond pulse seed with low energy and low jitter at a picofocus (pJ) level is amplified to uJ-mJ (10 <-6 > J-10 <-3 > J), so that low jitter and large energy output of laser pulses and trigger signals are realized, and application development of high-precision laser ranging, laser communication, time-frequency transmission and the like is effectively promoted.

The invention discloses a high-power picosecond pulse train laser with programmable sub-pulse energy and a method, and relates to the related technical field of lasers, the high-power picosecond pulse train laser comprises a mode-locked fiber laser, an acousto-optic modulator and a solid amplification chain which are sequentially arranged along an optical transmission path; the mode-locked fiber laser generates a mode-locked picosecond pulse sequence; the acousto-optic modulator performs pulse selection and pulse string grouping on the mode-locked picosecond pulse sequence, and performs pre-programming shaping on sub-pulse energy in a pulse string according to set intensity distribution to generate a pre-shaped pulse string; the solid amplification chain comprises at least one stage of solid amplifier, and the solid amplifier comprises a dichroscope, a laser gain crystal, a coupling optical assembly and an LD pumping source; and the dichroscope is used for focusing the pre-shaped pulse string amplified at the previous stage and the LD pump light transmitted by the coupling optical assembly into the laser gain crystal. Independent programmable regulation and control of the energy of each sub-pulse in the pulse string are realized, and the energy distribution of each sub-pulse in the pulse string can be flexibly adjusted.

The invention discloses an ultrafast laser partition impact strengthening method and device for a thin-wall covered edge of a composite blade. According to the method, the surface of the thin-wall covered edge is strengthened by utilizing the characteristics of instantaneous high pressure of shock waves induced by ultrafast laser and accurate and controllable propagation depth, and meanwhile, according to the thickness characteristics of different areas of the covered edge, laser with different pulse widths is selected to carry out partitioned strengthening treatment, so that accurate regulation and control of a surface residual stress field are realized on the premise of inhibiting deformation; the problem of cooperative control of surface strengthening deformation and a stress field of the thin-wall edge covering structure is solved. According to the thickness characteristics of different areas of the edge covering structure, based on the principle that the shorter the laser pulse width is, the shallower the shock wave propagation depth is, the shallow the depth of a residual stress field influence layer is and the edge covering structure is not prone to deformation, a femtosecond / picosecond pulse width laser combined shock peening method is provided, and femtosecond laser shock is adopted in a thin-wall area; femtosecond laser or picosecond laser with relatively long pulse width is adopted for impact in a wall thickness area, and precise regulation and control of a surface stress field are achieved on the premise of restraining thin-wall wrapping edge deformation.

The invention discloses a generating device capable of generating an ultra-flat broadband micro comb. The generating device comprises a pump pulse generating module, a micro comb generating module and a micro comb generating module, the pumping pulse compression module is connected with the pumping pulse generation module; the high-Q-value microcavity module is connected with the pumping pulse compression module; and the micro comb detection and feedback module is respectively connected with the high-Q-value micro-cavity module and the pump pulse generation module, and is used for monitoring the output spectrum and power change of the high-Q-value micro-cavity module and adjusting the output wavelength of the picosecond pulse light according to the output spectrum and power change so as to stabilize the ultra-flat broadband micro comb. By arranging the high-Q-value micro-cavity, the spectral bandwidth of the micro-comb can be effectively expanded, and the ultra-flat broadband micro-comb is output; meanwhile, the defects that the hyperbolic secant single soliton micro-comb is poor in flatness and narrow in bandwidth are overcome, and the micro-comb has obvious advantages in the application field with high requirements for the flatness and the spectral bandwidth at the same time.

The invention provides a picosecond pulse source based on a harmonic self-mode-locking semiconductor surface emitting laser, which comprises an optical pumping assembly and a V-cavity resonant cavity assembly, and is characterized in that the optical pumping assembly comprises a semiconductor bar laser and a collimating focusing lens optical coupling assembly, and the V-cavity resonant cavity assembly comprises a microcavity gain structure and an outer cavity structure; pump laser emitted by the semiconductor bar laser is focused and coupled through the collimating focusing lens optical coupling assembly, then light spots are output, the light spots are absorbed and gained through the microcavity gain structure, and resonance laser is output through feedback resonance of the outer cavity structure. And when the resonant laser in the external cavity structure is matched with the light spot, the external cavity structure outputs a mode-locked pulse after spatio-temporal dynamics calculation and adjustment. The picosecond pulse source realizes harmonic mode-locked pulse output with hundred picosecond pulse width and hundred MHz repetition frequency.

The utility model discloses an ultra-high-speed picosecond pulse rising edge generator, which relates to the technical field of power electronics and comprises an oscillating circuit, a multivibrator circuit and a trigger, and the oscillating circuit is electrically connected with the trigger through the multivibrator circuit. The oscillating circuit comprises a first integrated circuit, a first resistor and a first capacitor, the model of the first integrated circuit is NE555, the sixth end of the first integrated circuit is electrically connected with the third end of the first integrated circuit through the first resistor, and the sixth end of the first integrated circuit is grounded through the first capacitor; a third end of the first integrated circuit is electrically connected with an input end of the multivibrator circuit, in the ultra-high-speed picosecond pulse rising edge generator, a high-frequency oscillation circuit is output through the oscillation circuit, frequency division oscillation output is carried out through the multivibrator circuit, and therefore picosecond-level oscillation output is achieved, and finally a pulse signal is output through the trigger. The whole circuit is simple in structure, high in practicability and high in cost performance.

The invention discloses an integrated multi-beam device and method for aircraft part laser preheating, polishing and strengthening, and the device comprises a computer control system, a laser preheating device, a picosecond pulse laser device, an ultra-strong pulse laser device and a workbench, wherein the computer control system is used for controlling the movement of the laser preheating device, the ultra-strong pulse laser device, the picosecond pulse device and the workbench; the laser preheating device is used for focusing large-light-spot continuous laser beams on the surface of the aircraft part loaded on the surface of the workbench, and preheating of the surface of the aircraft part is achieved. The picosecond pulse device is used for forming small light spots which are focused on the preheated surface of the aircraft part to polish the surface of the aircraft part; the ultra-strong pulse laser device is used for forming high-energy small light spots which are focused on the polished surface of the aircraft part, and laser shock peening of the surface of the aircraft part is achieved. The machining efficiency and precision of aircraft parts can be effectively improved, and the manufacturing cost is reduced.

The invention discloses an ion channel protein near-atomic scale confinement dissolution electrochemical machining method based on a bionic confinement interface. The method is characterized in that a bionic phospholipid bilayer mask is spread on a workpiece anode to shield a non-processing area, ion channel protein is embedded into the bionic phospholipid bilayer mask to serve as an electrolyte channel, and when the bionic phospholipid bilayer mask is powered on, the anode dissolution reaction is strictly limited in the ion channel protein channel. Millivolt-level picosecond-nanosecond pulse voltage or current is adopted on the time scale so that anode metal atoms can be removed one by one, electrolytic products are discharged in the modes of electrolyte adjustment, microcosmic acting force, micro vibration and the like so as to ensure sustainable generation of electrochemical reaction, and therefore near-atomic-scale electrolytic machining is achieved. The electrochemical machining technology and the biological field are fused in an interdisciplinary mode, the near-atomic-scale electrochemical dissolution reaction space is constructed, the capacity of electrochemical machining for removing materials in an ion form is approached, and near-atomic-scale electrochemical machining is achieved.

Methods, systems and apparatus are disclosed for delivery of pulsed treatment radiation by employing a pump radiation source generating picosecond pulses at a first wavelength, and a frequency-shifting resonator having a lasing medium and resonant cavity configured to receive the picosecond pulses from the pump source at the first wavelength and to emit radiation at a second wavelength in response thereto, wherein the resonant cavity of the frequency-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source. Methods, systems and apparatus are also disclosed for providing beam uniformity and a sub-harmonic resonator.

Wavelength-tunable source of pulsed laser radiation for VIS-NIR spectroscopy which consists of a pump source (1) forming bursts of picosecond pulses of high pulse repetition rate, and a synchronously pumped optical parametric oscillator (2). The pump source (1) comprises a solid-state regenerative amplifier (31) having one or two electro-optical switches (32,33) inside its resonator (44). The switches create partial transmission of the resonator for a time interval longer than a resonator roundtrip time, and eject a part of energy of a pulse circulating inside. Bursts of 5-10 ns duration are formed, which are filled with high peak power picosecond pulses. Pulse repetition rate of the order of GHz of pump pulses allows the construction of a compact optical parametric oscillator. The whole set of parameters ensures high energy efficiency, stability and an ability to provide output pulse bursts repeating at up to 10 kHz repetition rate.

1. The name of the product of this design: Electronic device with a graphical user interface for control tool software (multifunctional high-speed picosecond pulse light source). 2. Purpose of the product of this design: an electronic device. 3. The key design point of this design product lies in the content of the graphical user interface. 4. The picture or photo that best illustrates the key points of the design: main view. 5. If the electronic device is of existing design, the rear view is omitted; if the electronic device is of existing design, the left view is omitted; if the electronic device is of existing design, the right view is omitted; if the electronic device is of existing design, the bottom view is omitted; if the electronic device is of existing design, the top view is omitted. 6. Purpose of the graphical user interface: The graphical user interface of this design product is used to display the status of the multifunctional high-speed picosecond pulse light source, control the multifunctional high-speed picosecond pulse light source, set parameters and query, and analyze the performance of the multifunctional high-speed picosecond pulse light source. 7. Human-computer interaction mode of the graphical user interface: Click "Frequency Point Configuration" in the main view to enter the interface change state diagram 1, and click "Other Parameter Configuration" in the interface change state diagram 1 to enter the interface change state diagram 2.

The application provides a picosecond pulse source based on harmonic self-mode-locking semiconductor surface-emitting laser, comprising an optical pumping assembly and a V-cavity resonant cavity assembly, the optical pumping assembly comprises a semiconductor bar laser and a collimating and focusing lens optical coupling assembly, and the V-cavity resonant cavity assembly comprises a microcavity gain structure and an external cavity structure; wherein the pump laser emitted by the semiconductor bar laser is focused and coupled by the collimating and focusing lens optical coupling assembly to output a light spot, the light spot is absorbed and gain-processed by the microcavity gain structure, and then the resonant laser is output by the external cavity structure through feedback resonance; and when the resonant laser and the light spot are matched in the external cavity structure, the external cavity structure outputs the mode-locked pulse after adjustment through spatiotemporal dynamics calculation. The picosecond pulse source realizes harmonic mode-locked pulse output with a pulse width of hundreds of picoseconds and a repetition frequency of hundreds of MHz.

1. The name of the product of this design: Multifunctional high-speed picosecond pulse light source panel. 2. Purpose of the product of this design: The multifunctional high-speed picosecond pulse light source is used to provide a high-speed narrow pulse light source, and the panel of the multifunctional high-speed picosecond pulse light source is used to cover the internal structure of the multifunctional high-speed picosecond pulse light source. 3. The design highlights of this appearance design product are: the pattern of the panel of the multifunctional high-speed picosecond pulse light source. 4. The picture or photo that best illustrates the key points of the design: main view. 5. The part covered by the semi-transparent red fill is the non-protected part.

The invention discloses a transient light source module for time-resolved near-infrared spectrum brain imaging equipment. The transient light source module comprises a laser, a picosecond pulse generator, a radio frequency bias device and a level shifter, after receiving a light source trigger signal, the picosecond pulse generator sends a pulse electric signal to the radio frequency bias device; after receiving the pulse electric signal, the radio frequency bias device biases the pulse electric signal to be close to the break-over voltage of the laser; the level converter generates a reference signal after receiving a light source trigger signal and is used for triggering the time-to-digital converter to start timing. The device has the advantages of high time resolution, deep tissue detection capability, dynamic response capability and the like, is high in signal-to-noise ratio, realizes miniaturization and portability of equipment, and is low in power consumption.

A photoconductive transducer intended to generate or detect waves in the terahertz frequency domain or in the picosecond pulse domain is provided. The transducer comprises a three-dimensional structure that includes, in this order, a first planar electrode, an array of nano-columns embedded in a layer of resist and a second planar electrode parallel to the first planar electrode. The design of the transducer increases the optical-to-terahertz conversion efficiency by means of photonic and plasmonic resonances and by means of high and homogeneous electric fields. The height of the nano-columns as well as the thickness of the resist range between 100 nanometres and 400 nanometres. The width of the nano-columns is between 100 nanometres and 400 nanometres, the distance between two adjacent nano-columns is between 300 nanometres and 500 nanometres, the nano-columns are made of a III-V semiconductor. The second electrode is transparent, so as to allow the transmission of a laser source towards the photo-absorbing nano-columns.

1. The name of this design product: Heat dissipation hole structure of multifunctional high-speed picosecond pulse light source. 2. Purpose of the product of this design: The multifunctional high-speed picosecond pulse light source is used to provide a high-speed narrow pulse light source, generate weak photons, and test the performance of optical devices. The heat dissipation hole structure of the multifunctional high-speed picosecond pulse light source is used for heat dissipation. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the key points of the design: main view. 5. The part covered by the semi-transparent red fill is the non-protected part.

1. The name of this design product: Heat dissipation hole structure of multifunctional high-speed picosecond pulse light source. 2. Purpose of the product of this design: The multifunctional high-speed picosecond pulse light source is used to provide a high-speed narrow pulse light source, generate weak photons, and test the performance of optical devices. The heat dissipation hole structure of the multifunctional high-speed picosecond pulse light source is used for heat dissipation. 3. The design highlights of this appearance design product lie in the shape of the heat dissipation hole structure of the multifunctional high-speed picosecond pulse light source. 4. The picture or photo that best illustrates the key points of the design: main view. 5. The part covered by the semi-transparent red fill is the non-protected part.

The invention discloses a system and a method for preparing a periodic structure on the surface of a semiconductor material. The method for preparing the periodic structure on the surface of the semiconductor material comprises the following steps: irradiating the surface of the semiconductor material by using combined laser formed by combining femtosecond laser and picosecond laser, and forming the required periodic structure on the surface of the semiconductor material by using femtosecond pulse and picosecond pulse double-beam interference. According to the invention, a sub-wavelength periodic structure is generated on GaN and other semiconductor materials by utilizing femtosecond pulse and picosecond pulse double-beam interference, and the required periodic structure is obtained by changing the relative delay of double beams, the light spot energy density, the pulse number and the polarization orientation of the two beams of light.

The present invention discloses a pulsed laser, comprising: a picosecond seed source module, a frequency selection module, at least one fiber amplification module and a solid-state amplification module; the picosecond seed source module is used to provide seed laser with a picosecond or sub-picosecond pulse width; the frequency selection module is arranged on one side of the picosecond seed source module for outputting the seed laser; the fiber amplification module is arranged on one side of the frequency selection module for outputting the laser; the solid-state amplification laser module is arranged on one side of the fiber amplification module for outputting the laser; by using the picosecond seed source module as the seed source of the laser and combining with the frequency selection module, the control of the laser pulse repetition frequency can be achieved, and then by using the fiber amplification module and the solid-state amplification module, the amplification of the power can be realized, so that during the process of amplifying the laser power, it can be amplified to the order of hundreds of watts or several hundreds of watts, thus expanding the application range of the laser.

The invention discloses a seed laser for implementing optical path regulation and control and an optical fiber laser coherent combination system. The seed laser comprises a picosecond pulse source, a high-speed photoelectric detector, an intensity modulator, a single-frequency laser and a phase modulation unit, the picosecond pulse source is connected with the high-speed photoelectric detector, the single-frequency laser is connected with the intensity modulator, the high-speed photoelectric detector converts a detected pulse optical signal into a pulse electric signal and loads the pulse electric signal to the intensity modulator, and the intensity modulator performs intensity modulation on laser output by the single-frequency laser to convert the laser into a pulse optical signal; and the intensity modulator is connected with the phase modulation unit and outputs the pulse light signal output by the intensity modulator after performing phase modulation on the pulse light signal. The seed laser is used for an optical fiber laser coherent combination system, and when optical path adjustment is implemented, the seed laser has the remarkable advantage that the central wavelength of a picosecond pulse source does not need to be kept consistent with the central wavelength of single-frequency seed laser in the coherent combination system, that is, one picosecond pulse source can be used for a plurality of coherent combination systems with different central wavelengths from the picosecond pulse source.

The application provides a semiconductor-pumped cesium vapor mode-locked laser and a method for generating ultra-short pulse laser. The laser comprises a semiconductor pumping source for outputting a pumping beam; a pumping light shaping system for receiving the pumping light and converging the pumping light to the middle part of a cesium vapor cell; the cesium vapor cell for performing gain on the shaped pumping light to generate gain laser; and a mode-locked resonant structure for outputting mode-locked laser after oscillation mode-locking of the gain laser. The pumping light emitted by the semiconductor pumping source is focused into the cesium vapor cell through the pumping light shaping system, and after gain on the cesium vapor as gain medium, the pumping light enters the mode-locked resonant structure to oscillate to form the cesium vapor mode-locked laser. The application has picosecond pulse width, and greatly improves the peak power of the current alkali metal laser.

The application discloses a high-power picosecond pulse train laser with programmable sub-pulse energy and a method, relates to the technical field of lasers, and comprises a mode-locked fiber laser, an acousto-optic modulator and a solid amplification chain arranged in sequence along an optical transmission path; the mode-locked fiber laser generates a mode-locked picosecond pulse sequence; the acousto-optic modulator performs pulse selection and pulse train grouping on the mode-locked picosecond pulse sequence, pre-programmed shaping is performed on the sub-pulse energy in the pulse train according to a set intensity distribution, and a pre-shaped pulse train is generated; the solid amplification chain comprises at least one solid amplifier, the solid amplifier comprises a dichroic mirror, a laser gain crystal, a coupling optical assembly and an LD pumping source; the dichroic mirror is used for focusing the pre-shaped pulse train amplified by the last stage and the LD pumping light transmitted through the coupling optical assembly into the laser gain crystal. Independent programmable control of the energy of each sub-pulse in the pulse train is realized, and the energy distribution of each sub-pulse in the pulse sequence can be flexibly adjusted.

The invention discloses a high-amplitude picosecond pulse source based on a metal oxide semiconductor field effect transistor and a step recovery diode. The high-amplitude picosecond pulse source is used for driving an ultrafast semiconductor laser. The circuit is composed of a power supply circuit, a pulse generation circuit based on an MOSFET, and a pulse shaping circuit based on an SRD and a short-circuit transmission line. The power supply circuit converts an external input constant voltage into different voltages suitable for each device, and also provides a bias current for the SRD in the shaping circuit, thereby guaranteeing the normal work of each part. The pulse generation circuit adopts an MOSFET driving chip to accelerate and amplify a trigger signal so as to drive a high-voltage-resistant and small-parasitic MOSFET and generate a high-amplitude and fast-leading-edge subnanosecond pulse. The pulse shaping circuit adopts a short-circuit transmission line structure composed of a parallel SRD and a Schottky diode, a preceding-stage pulse is sharpened, and a picosecond Gaussian pulse with the amplitude up to 10V is generated. The design serves as an electric pulse generator, has ultra-short pulse width and high amplitude, and can be applied to semiconductor lasers of various wave bands.

The application provides a GHz picosecond laser pulse generation device and method based on FPGA. The GHz picosecond laser pulse generation method comprises the following steps: generating four paths of clock signals with a phase interval of 90 degrees and a frequency of not less than 250 MHz in an FPGA by using a clock synthesizer, driving a half-period pulse generation unit by each clock to generate a pulse with a width less than a clock period, generating a picosecond-level pulse signal from the pulse, and generating a GHz pulse signal from the four paths of picosecond-level pulse signals by a pulse synthesis unit, which is used to drive a subsequent laser. The GHz picosecond laser pulse generation device and method based on FPGA comprise a clock synthesis unit, a half-period pulse width generation unit, a picosecond pulse generation unit and a pulse synthesis unit, and the GHz pulse has good consistency and high stability.

The invention discloses a picosecond pulse optical fiber amplifier and a laser, and relates to the technical field of optical fiber laser amplification. The picosecond pulse optical fiber amplifier comprises a polarization-maintaining optical fiber picosecond mode-locked oscillator, a first optical fiber circulator, a first polarization-maintaining optical fiber polarization beam splitter, an optical fiber Faraday rotation structure, an optical fiber grating, a second polarization-maintaining optical fiber polarization beam splitter and a second optical fiber circulator which are sequentially connected through optical fibers, and the amplification frequency modulation assembly is respectively connected with the first optical fiber circulator and the second optical fiber circulator through optical fibers. Therefore, the picosecond pulse optical fiber amplifier enables the signal light to be separated from the stray light transmitted from the fiber bragg grating by controlling the polarization state of the laser, the pulse broadening and compression of the laser can be completed only through one fiber bragg grating, and the nonlinear effect generated in the pulse amplification process is reduced. Therefore, high-energy pulses equivalent to input signal light pulse width are obtained in an all-fiber structure, the structure is simple, and integration is easy.

The application discloses a kind of tissue treatment systems based on dual-wavelength picosecond pulse synergism, comprising: laser light path component, light regulation module, beam combination and focusing device, multimodal sensor acquisition module and control unit, laser light path component includes laser source, frequency doubling crystal and beam splitter;Laser source, frequency doubling crystal and beam splitter are sequentially arranged, laser source emits laser to frequency doubling crystal, generates second harmonic, then the light beam is separated after passing through beam splitter, forms two laser beams, light beam is shot into light regulation module, light regulation module is shot into beam combination and focusing device after regulating laser beam, beam combination and focusing device are shot to target area, multimodal sensor acquisition module collects the signal feedback of target area, and control unit processes the signal collected.The application emits fundamental frequency light, is regulated by light regulation module, accurately controls pulse emission timing, according to the signal feedback of multimodal sensor acquisition module, real-time dynamic fine-tuning pulse timing and energy.

The present invention discloses a method for generating isolated attosecond pulses, belonging to the field of ultrashort pulse laser technology. The method is to introduce a long-pulse pump light on the basis of ionization gating, continuously inject the energy of the pump light into the ionization pulse, and generate attosecond pulses through the transfer of pump energy to attosecond pulse energy. The present invention first proposes a method for generating attosecond pulses from picosecond pulses. Since the energy of picosecond pulses can reach thousands of joules, at a conversion efficiency of about 0.1%, the corresponding energy of the generated attosecond pulses can reach several joules, which is 5-6 orders of magnitude higher than the existing microjoules.

The invention provides a controllable high repetition frequency multiplication fiber laser and system, and relates to the technical field of lasers, the controllable high repetition frequency multiplication fiber laser comprises an adjustable repetition frequency mode-locked seed source, an adjustable repetition frequency multiplication module and a repetition frequency control module, the adjustable repetition frequency mode-locked seed source is connected with the adjustable repetition frequency multiplication module; the adjustable repetition frequency multiplication module is used for dividing the picosecond pulse light output by the adjustable repetition frequency mode-locked seed source into multiple paths and combining the multiple paths of picosecond pulse light again to generate repetition frequency doubled pulse light; the repetition frequency control module is respectively connected with the adjustable repetition frequency mode-locked seed source and the adjustable repetition frequency multiplication module, and is used for receiving multiple paths of picosecond pulse light output by the adjustable repetition frequency multiplication module and outputting a feedback control signal to the adjustable repetition frequency mode-locked seed source and the adjustable repetition frequency multiplication module; and the repetition frequency of the controllable high repetition frequency multiplication fiber laser and an external reference frequency signal are locked. According to the invention, high repetition frequency and high-precision adjustable mode-locked laser output can be realized.

The invention belongs to the technical field of laser, and particularly discloses a picosecond pulse wavelength tunable near-infrared narrow linewidth laser, which is used for providing picosecond pulse laser. The frequency doubling module is used for converting the picosecond pulse laser into pump light through the nonlinear effect of a frequency doubling crystal; the parametric oscillator is used for matching the phase period of the PPLN crystal through temperature control to output signal light, and the length of the resonant cavity is adjusted by combining piezoelectric ceramics, so that the output wavelength range of the signal light is adjusted; and the adjustable optical filter is used for receiving the signal light, and outputting the narrow-spectrum laser corresponding to the signal light by controlling the cavity length of the Fabry-Perot cavity when the intensity of the spectrum transmitted by the cavity length coincides with the transmission spectrum of the Ethernet etalon. According to the invention, tunable wavelength of 800nm-1030nm and narrow-pulse narrow-spectrum laser output are realized.

The application discloses a kind of microvia processing methods based on picosecond-microsecond composite laser, steps include: S1: processing substrate is washed and dried;S2: setting laser processing path;S3: first pulsed laser is generated and shaped;S4: after interval predetermined time, second pulsed laser is generated and primarily shaped;S5: first pulsed laser and second pulsed laser are integrated by beam combiner, and cooperate in predetermined position, form microvia;Again, microvia is sequentially processed along laser processing path in processing substrate, microvia array processed in processing substrate can be formed.The microvia processing method is through the synergistic mechanism of " picosecond pulse induced channel " and " microsecond pulse selective removal ", using its no diffraction, long focal depth characteristics, can be processed in hard and brittle transparent material once microvia with depth-diameter ratio more than 300:1, and single-hole processing time can be shortened to 20 μs, suitable for high depth-diameter ratio microvia high-density, mass production.