CN115579723B - Time domain and spectrum shape controllable pulse train generation system and method - Google Patents
Time domain and spectrum shape controllable pulse train generation system and method Download PDFInfo
- Publication number
- CN115579723B CN115579723B CN202211491086.3A CN202211491086A CN115579723B CN 115579723 B CN115579723 B CN 115579723B CN 202211491086 A CN202211491086 A CN 202211491086A CN 115579723 B CN115579723 B CN 115579723B
- Authority
- CN
- China
- Prior art keywords
- pulse train
- frequency
- module
- pulse
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Lasers (AREA)
Abstract
The invention relates to a pulse train generating system with controllable time domain and spectral shape, which comprises: the pulse shaping device comprises a pulse light source, an acousto-optic modulator, a synchronous control circuit, a frequency doubling module, a waveform shaper, an optical parametric amplification module, a time delay module and a sum frequency module, wherein the waveform shaper is used for shaping a fundamental frequency pulse train into a signal light pulse train; the frequency doubling module is used for doubling the frequency of the fundamental frequency pulse train; the delay module is used for delaying the frequency-doubled base frequency pulse string; and the sum frequency module is used for summing the idle frequency optical pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train. The invention can respectively and freely adjust the shape and the spectrum of the injected pulse train through the optical parametric nonlinear process, provides a control method of the spectrum shape and the envelope shape of the pulse train while ensuring the generation efficiency of the ultraviolet pulse train, and realizes the arbitrary adjustment of the spectrum and the envelope shape of the pulse train.
Description
Technical Field
The invention belongs to the technical field of laser control, particularly relates to the technical field of ultrafast laser, and particularly relates to a pulse train generating system and method with controllable time domain and spectrum shapes.
Background
High-energy ultraviolet pulse lasers are currently important tools for realizing industrial precision machining. In recent years, with the continuous improvement of laser pulse energy, the processing efficiency is improved, however, plasma is formed when high-energy pulses interact with substances, the subsequent pulses are seriously interfered to act on target substances again, the laser energy is reduced from being coupled to the substances to be processed, and the instability of the laser plasma is formed. The smoothness of an optical pulse sequence is increased by adopting a time domain phase modulation mode in a current high-energy solid-state laser system, however, the bandwidth generated by pure phase modulation is far lower than the bandwidth required for relieving a laser plasma effect, so that a spectrum modulation technology is combined, a pulse train is effectively modulated in a time domain and a spectrum, the laser plasma effect is reduced, and the processing efficiency and quality are improved.
Disclosure of Invention
To improve the problems of stability and bandwidth of the energy laser pulse, in a first aspect of the invention, there is provided a pulse train generation system with controllable temporal and spectral shape, comprising: the pulse light source is respectively connected with the acousto-optic modulator and the synchronous control circuit and is used for generating a fundamental frequency pulse and a clock signal required by the synchronous control circuit; the synchronous control circuit is respectively connected with the acousto-optic modulator and the waveform shaper and is used for providing different time sequence control signals for the acousto-optic modulator and the waveform shaper; the acousto-optic modulator is respectively connected with the frequency doubling module and the waveform shaper and used for respectively providing a fundamental frequency pulse string for the waveform shaper and the frequency doubling module and adjusting the envelope of the fundamental frequency pulse string under the drive of a time sequence control signal sent by the synchronous control circuit; the waveform shaper is connected with the optical parametric amplification module and is used for shaping the fundamental frequency pulse train into a signal optical pulse train; the frequency doubling module is used for doubling the frequency of the fundamental frequency pulse train; the optical parametric amplification module is respectively connected with the delay module and the frequency module and is used for generating an idler frequency optical pulse train according to the signal optical pulse train and the frequency-doubled base frequency pulse train; the delay module is used for delaying the frequency-doubled base frequency pulse string; and the sum frequency module is used for summing the idle frequency optical pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train.
In some embodiments of the present invention, the synchronization control circuit is further configured to receive and convert a timing signal generated by the pulsed light source, and output a synchronization electrical signal according to the timing signal.
In some embodiments of the invention, the frequency doubling module comprises a fundamental pulse amplifier and a nonlinear crystal for frequency doubling.
In some embodiments of the invention, the nonlinear crystal comprises a BBO, LBO, or periodically-excited lithium niobate crystal.
In some embodiments of the present invention, the optical parametric amplifier generates a second-order nonlinear effect of the optical nonlinear crystal based on the signal light and the pump light with different wavelengths, and generates an idler frequency light.
In some embodiments of the present invention, the sum frequency module is based on a second-order nonlinear effect of an optical nonlinear crystal, and the frequency of the output pulsed light is the sum of all input optical frequencies.
In the above embodiment, a laser amplifier is further included between the acousto-optic modulator and the frequency doubling module.
The invention provides a method for generating a pulse train with controllable time domain and spectrum shape, which comprises a pulse light source, an acousto-optic modulator, a synchronous control circuit, a frequency doubling module, a waveform shaper, an optical parametric amplification module, a time delay module and a sum frequency module, and comprises the following steps: generating a base frequency pulse and a clock signal required by a synchronous control circuit based on a pulse light source; providing different timing control signals to the acousto-optic modulator and the waveform shaper based on the synchronous control circuit; under the drive of a time sequence control signal sent by a synchronous control circuit, respectively providing a fundamental frequency pulse string for a waveform shaper and a frequency doubling module and adjusting the envelope of the fundamental frequency pulse string; splitting the fundamental frequency pulse train, wherein one part of the fundamental frequency pulse train is shaped into a signal optical pulse train, and the other part of the fundamental frequency pulse train is subjected to frequency doubling; generating an idler frequency optical pulse train according to the signal optical pulse and the serial frequency-doubled base frequency pulse train, and delaying the serial frequency-doubled base frequency pulse train; and carrying out sum frequency on the idle frequency optical pulse train and the delayed fundamental frequency pulse train to generate an ultraviolet pulse train.
In a third aspect of the present invention, there is provided an electronic device comprising: one or more processors; a storage device for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the time-domain and spectral shape controllable pulse train generation method provided by the invention in the second aspect.
In a fourth aspect of the invention, a computer-readable medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the time-domain and spectral-shape controllable pulse train generating method provided by the invention in the second aspect.
The invention has the beneficial effects that:
the embodiment of the invention provides a pulse train generating system with controllable time domain and spectrum shapes, which is characterized in that firstly, time domain modulation and spectrum modulation are respectively carried out on a pulse train generated by a pulse source, and then the shape and the spectrum of the injected pulse train are respectively and freely adjusted by utilizing an optical parameter nonlinear process.
Drawings
FIG. 1 is a schematic diagram of the basic structure of a time-domain and spectral-shape controllable pulse train generation system in some embodiments of the invention;
FIG. 2a is a schematic diagram of the temporal modulation process of the pulses of a temporal and spectral shape controllable pulse train generation system in some embodiments of the present invention;
FIG. 2b is a schematic diagram of the spectral modulation process of the pulses of the time-domain and spectral-shape controllable pulse train generation system in some embodiments of the present invention;
FIG. 3 is a schematic diagram of a specific configuration of a time-domain and spectral-shape controllable pulse train generation system in some embodiments of the invention;
FIG. 4 is a schematic flow chart of a method of generating a time-domain and spectral-shape controllable pulse train in some embodiments of the invention;
fig. 5 is a schematic structural diagram of an electronic device in some embodiments of the invention.
Reference numerals
101. A pulsed light source; 102. an acousto-optic modulator; 103. a synchronous control circuit; 104. a frequency doubling module; 105. a waveform shaper; 106. an optical parametric amplification module 107 and a delay module; 108 and a frequency module.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
In a first aspect of the invention, there is provided a time-domain and spectral-shape controllable pulse train generation system comprising: the pulse light source is respectively connected with the acousto-optic modulator and the synchronous control circuit and is used for generating a fundamental frequency pulse and a clock signal required by the synchronous control circuit; the synchronous control circuit is respectively connected with the acousto-optic modulator and the waveform shaper and is used for providing different time sequence control signals for the acousto-optic modulator and the waveform shaper; the acousto-optic modulator is respectively connected with the frequency doubling module and the waveform shaper and used for respectively providing a fundamental frequency pulse string for the waveform shaper and the frequency doubling module and adjusting the envelope of the fundamental frequency pulse string under the drive of a time sequence control signal sent by the synchronous control circuit; the waveform shaper is connected with the optical parametric amplification module and is used for shaping the fundamental frequency pulse train into a signal optical pulse train; the frequency doubling module is used for doubling the frequency of the fundamental frequency pulse train; the optical parametric amplification module is respectively connected with the delay module and the sum frequency module and is used for generating an idle frequency optical pulse string according to the signal optical pulse string and the frequency-doubled base frequency pulse string; the delay module is used for delaying the frequency-doubled base frequency pulse string; and the sum frequency module is used for carrying out sum frequency on the idle frequency optical pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train.
It can be understood that, according to the nonlinear parametric amplification theory, the nonlinear effect has an obvious threshold characteristic, and the time domain distribution of the pump light will affect the time domain intensity distribution of the idler light, while the spectral shape of the signal light will affect the spectral shape of the idler light; by utilizing the characteristic, the purpose of adjusting the pulse time domain and the spectrum shape can be achieved by adjusting the pulse time domain and the spectrum shape and controlling the process of generating the nonlinear effect on the time sequence. The pulse light source can generate stable light pulse sequence, and can be mode-locked fiber laser, modulated semiconductor laser or solid laser.
Referring to fig. 1, in a specific embodiment of a time-domain and spectral-shape controllable pulse train generation system, it comprises: the device comprises a pulse light source 101, an acousto-optic modulator 102, a synchronous control circuit 103, a frequency doubling module 104, a waveform shaper 105, an optical parametric amplification module 106, a time delay module 107 and a sum frequency module 108. The pulse light source 101 is respectively connected with the acousto-optic modulator 102 and the synchronous control circuit 103, and is used for generating a fundamental frequency pulse and a control circuit clock signal; the synchronous control circuit 103 is connected with the acousto-optic modulator 102 and the waveform shaper 104 and is used for providing timing control signals of different branches; the acousto-optic modulator 102 comprises an electrical control end, an optical input end and an optical output end, wherein a circuit control interface is connected with the synchronous control circuit 103, the optical input end is connected with the pulse light source 101, an optical output port is divided into two parts, one part is connected with the frequency doubling module 104, and the other part is connected with the waveform shaper 105; the frequency doubling module 104 is used for generating a base frequency pulse train and adjusting a pulse train envelope; the waveform shaper 105 is connected with the optical parametric amplification module 106 and is used for providing the signal light after the spectral shaping; the frequency doubling module 104 is connected to the optical parametric amplification module 106, and is configured to provide pump light required for optical parametric amplification; the optical parametric amplifier 106 uses the frequency-doubled laser output by the frequency doubling module 104 as pump light, and uses the fundamental frequency light output by the waveform shaper 105 as signal light for generating idler frequency light of a visible light band; the output light of the optical parametric amplifier 106 is respectively connected with the delay module 107 and the sum frequency module 108 according to the wavelength, the frequency doubling light enters the sum frequency module 108 after passing through the delay module, and the idle light directly enters the sum frequency module 108 and is summed with the frequency doubling light to generate an ultraviolet pulse train.
It can be understood that the time domain and spectrum modulation method in the invention is one of the core steps of an ultraviolet pulse train generation system with controllable time domain and spectrum shapes, and the method has the main function of respectively performing time domain modulation and spectrum modulation on different positions of the envelope of the pulse train so as to realize the modulation of the ultraviolet pulse train. The modulation process of the pulsed time domain and the spectrum is therefore described in detail in the following examples to more clearly convey the idea of the invention.
As shown in fig. 2, fig. 2a and fig. 2b are divided into modulation processes of pulse time domain and spectrum: fig. 2a shows the waveform variation in the time domain modulation process, including: a pulse train 201 output by the acousto-optic modulator, a frequency doubling module output pulse train 202, a waveform shaper output pulse train 203, a residual frequency doubling pulse train 204 output by the optical parametric amplification module, an idler frequency optical pulse train 205 output by the optical parametric amplification module and a finally output ultraviolet pulse train 206; the specific time domain modulation process is as follows: the pulse string 201 output by the acousto-optic modulator is divided into two parts which respectively enter a frequency doubling module and a waveform shaping module, and the pulse string 203 output by the waveform shaping module and the pulse string 202 output by the frequency doubling module have time delay under the control of a synchronous control circuit signal; after entering the optical parametric amplification module, only the overlapped part is subjected to parametric amplification to generate an idler light 205; the delay between the idler optical pulse train 205 and the residual frequency doubling pulse train 204 is controlled by a delay module, and only the frequency summation effect occurs at the time domain coincident part to generate an ultraviolet pulse train 206; the time domain shape of the ultraviolet pulse train can be controlled by controlling the time delay between the pulse trains and the shape of the pulse train.
Fig. 2b shows the waveform variation during spectral modulation, which includes: a pulse train spectrum 207 output by the acousto-optic modulator, a pulse train spectrum 208 output by the frequency doubling module, a pulse train spectrum 209 output by the waveform shaper, a residual frequency doubling pulse train spectrum 210 output by the optical parametric amplification module, an idle frequency pulse train spectrum 211 output by the optical parametric amplification module and an ultraviolet pulse train spectrum 212 finally output; the specific spectrum modulation process is as follows: the pulse train 207 output by the acousto-optic modulator is divided into two parts, which enter a frequency doubling module and a waveform shaping module respectively, and are controlled by signals of a synchronous control circuit, and the spectrum 209 of the pulse train output by the waveform shaping module is subjected to spectrum modulation; after entering the optical parametric amplification module, an idler spectrum 211 is generated, and the spectrum shape of the idler is determined by the modulation spectrum of the waveform shaper; the spectrum between the idler spectrum 211 and the residual octave burst 210 determines the uv burst spectrum 212 generated after the sum frequency; the control of the time domain shape of the ultraviolet pulse train can be realized by controlling the modulation waveform of the waveform shaper.
Referring to fig. 3, in order to improve frequency doubled optical pulses, in one embodiment of a time-domain and spectral-shape controllable pulse train generation system, it comprises: the output of the fiber laser 301 as a pulse light source is respectively connected to an acousto-optic modulator 302 and a synchronous control circuit 303; the synchronous control circuit 303 generates a pulse train control signal to drive the acousto-optic modulator 302 to output a pulse train; the pulse train is split into two beams by the fiber splitter 304, and the two beams enter the Nd: YAG amplifier 305 and waveform shaper 307; the amplified pulse train is subjected to frequency multiplication in an LBO crystal frequency multiplication module 306 to output a frequency multiplication pumping pulse train, and a waveform shaper 307 outputs a pulse train subjected to spectrum modulation under the control of a synchronous control circuit 303; then the spectrum modulation pulse train and the frequency doubling pulse train are coupled and enter a BBO crystal optical parametric amplification module 308 for optical parametric amplification, the output residual pump light and the output idler frequency light are split by a dichroic mirror 309, wherein the residual pump light enters a delay module 310 for adjusting the delay between the residual pump light and the idler frequency light, and the residual pump light and the idler frequency light are superposed again through a dichroic mirror 311 on the other side; and the recombined pulse train enters a KDP crystal and frequency summation module to sum frequency to generate an ultraviolet pulse train with modulated time domain and spectrum shapes.
Example 2
Referring to fig. 4, in a second aspect of the present invention, there is provided a method for generating a pulse train with controllable time domain and spectrum shape, including a pulse light source, an acousto-optic modulator, a synchronous control circuit, a frequency doubling module, a waveform shaper, an optical parametric amplification module, a delay module, and a sum frequency module, and specifically including the steps of: s100, generating a base frequency pulse and a clock signal required by a synchronous control circuit based on a pulse light source; s200, providing different time sequence control signals for an acousto-optic modulator and a waveform shaper based on a synchronous control circuit; under the drive of a time sequence control signal sent by a synchronous control circuit, respectively providing a fundamental frequency pulse string for a waveform shaper and a frequency doubling module and adjusting the envelope of the fundamental frequency pulse string; s300, splitting the fundamental frequency pulse train, wherein one part of the fundamental frequency pulse train is shaped into a signal light pulse train, and the other part of the fundamental frequency pulse train is subjected to frequency doubling; s400, generating an idler frequency optical pulse train according to the signal optical pulse and the serial frequency-doubled base frequency pulse train, and delaying the serial frequency-doubled base frequency pulse train; s500, sum frequency is carried out on the idler frequency optical pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train.
Example 3
Referring to fig. 5, in a third aspect of the present invention, there is provided an electronic apparatus comprising: one or more processors; storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to carry out the method of the invention in the first aspect.
The electronic device 500 may include a processing means (e.g., central processing unit, graphics processor, etc.) 501 that may perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM) 502 or a program loaded from a storage means 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the electronic apparatus 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.
The following devices may be connected to the I/O interface 505 in general: input devices 506 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices 507 including, for example, a Liquid Crystal Display (LCD), speakers, vibrators, and the like; a storage device 508 including, for example, a hard disk; and a communication device 509. The communication means 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. While fig. 5 illustrates an electronic device 500 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may be alternatively implemented or provided. Each block shown in fig. 5 may represent one device or may represent multiple devices as desired.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer-readable medium, the computer program comprising program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means 509, or installed from the storage means 508, or installed from the ROM 502. The computer program, when executed by the processing device 501, performs the above-described functions defined in the methods of embodiments of the present disclosure. It should be noted that the computer readable medium described in the embodiments of the present disclosure may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In embodiments of the present disclosure, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device. The computer-readable medium carries one or more computer programs which, when executed by the electronic device, cause the electronic device to:
computer program code for carrying out operations for embodiments of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, python, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (10)
1. A time-domain and spectral-shape controllable pulse train generation system, comprising: a pulse light source, an acousto-optic modulator, a synchronous control circuit, a frequency doubling module, a waveform shaper, an optical parametric amplification module, a time delay module and a sum frequency module,
the pulse light source is respectively connected with the acousto-optic modulator and the synchronous control circuit and is used for generating a fundamental frequency pulse and a clock signal required by the synchronous control circuit;
the synchronous control circuit is respectively connected with the acousto-optic modulator and the waveform shaper and is used for providing different time sequence control signals for the acousto-optic modulator and the waveform shaper;
the acousto-optic modulator is respectively connected with the frequency doubling module and the waveform shaper and used for respectively providing a fundamental frequency pulse string for the waveform shaper and the frequency doubling module and adjusting the envelope of the fundamental frequency pulse string under the drive of a time sequence control signal sent by the synchronous control circuit;
the waveform shaper is connected with the optical parametric amplification module and is used for shaping the fundamental frequency pulse train into a signal optical pulse train;
the frequency doubling module is used for doubling the frequency of the fundamental frequency pulse train;
the optical parametric amplification module is respectively connected with the delay module and the sum frequency module and is used for generating an idler frequency optical pulse train according to the signal optical pulse train and the frequency-doubled base frequency pulse train;
the delay module is used for delaying the frequency-doubled base frequency pulse string;
and the sum frequency module is used for summing the idle frequency optical pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train.
2. The time and spectral shape controllable pulse train generation system of claim 1, wherein said synchronization control circuit is further configured to receive and convert a timing signal generated by a pulsed light source and output a synchronization electrical signal based on said timing signal.
3. The time and spectral shape controllable pulse train generation system of claim 1, wherein said frequency doubling module comprises a fundamental pulse amplifier and a nonlinear crystal for frequency doubling.
4. The time-domain and spectral shape controllable pulse train generation system of claim 3, wherein said nonlinear crystal comprises a BBO, LBO, or periodically-excited lithium niobate crystal.
5. The time-domain and spectral-shape controllable pulse train generation system according to claim 1, wherein the optical parametric amplification module generates a second-order nonlinear effect of the optical nonlinear crystal based on the signal light and the pump light with different wavelengths to generate idler light.
6. The time-domain and spectral-shape controllable pulse train generating system according to claim 1, wherein said sum frequency module is based on the second-order nonlinear effect of the optical nonlinear crystal, and the frequency of the output pulsed light is the sum of all input optical frequencies.
7. A time-domain and spectral-shape controllable pulse train generation system according to any of claims 1 to 6, further comprising a laser amplifier between the acousto-optic modulator and the frequency doubling module.
8. A method for generating a pulse train with controllable time domain and spectrum shape comprises a pulse light source, an acousto-optic modulator, a synchronous control circuit, a frequency doubling module, a waveform shaper, an optical parametric amplification module, a time delay module and a sum frequency module, and is characterized by comprising the following steps:
generating a base frequency pulse and a clock signal required by a synchronous control circuit based on a pulse light source;
providing different timing control signals to the acousto-optic modulator and the waveform shaper based on the synchronous control circuit; under the drive of a time sequence control signal sent by a synchronous control circuit, respectively providing a fundamental frequency pulse string for a waveform shaper and a frequency doubling module and adjusting the envelope of the fundamental frequency pulse string;
splitting the fundamental frequency pulse train, wherein one part of the fundamental frequency pulse train is shaped into a signal light pulse train, and the other part of the fundamental frequency pulse train is subjected to frequency doubling;
generating an idler frequency optical pulse train according to the signal optical pulse and the base frequency pulse train after the series frequency doubling, and delaying the base frequency pulse train after the series frequency doubling;
and carrying out sum frequency on the idler frequency pulse train and the delayed base frequency pulse train to generate an ultraviolet pulse train.
9. An electronic device, comprising: one or more processors; storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the time-domain and spectral shape controllable pulse train generation method of claim 8.
10. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the method for temporal and spectral shape controllable pulse train generation according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211491086.3A CN115579723B (en) | 2022-11-25 | 2022-11-25 | Time domain and spectrum shape controllable pulse train generation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211491086.3A CN115579723B (en) | 2022-11-25 | 2022-11-25 | Time domain and spectrum shape controllable pulse train generation system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115579723A CN115579723A (en) | 2023-01-06 |
| CN115579723B true CN115579723B (en) | 2023-04-07 |
Family
ID=84590269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211491086.3A Active CN115579723B (en) | 2022-11-25 | 2022-11-25 | Time domain and spectrum shape controllable pulse train generation system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115579723B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117471720B (en) * | 2023-12-27 | 2024-04-09 | 武汉中科锐择光电科技有限公司 | Ultra-short pulse shaping device based on acousto-optic delay line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535018A (en) * | 2019-10-10 | 2019-12-03 | 深圳大学 | A kind of tunable broad band intermediate infrared laser system |
| CN115377786A (en) * | 2022-10-27 | 2022-11-22 | 武汉中科锐择光电科技有限公司 | System and method for improving laser pulse time domain contrast |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230075147A1 (en) * | 2020-02-03 | 2023-03-09 | Izmir Biyotip Ve Genom Merkezi | Method and system using optical phase modulation and optical phase demodulation and spectral filtering to generate an optical pulse train |
| CN111693159B (en) * | 2020-05-30 | 2021-09-21 | 华南理工大学 | Time-frequency multiplexing-based large-bandwidth ultrafast pulse real-time domain measurement method and system |
| CN112636133B (en) * | 2020-11-13 | 2022-07-19 | 香港理工大学深圳研究院 | External cavity modulation method with variable free spectral range and swept-frequency laser |
| JP7441780B2 (en) * | 2020-12-21 | 2024-03-01 | 浜松ホトニクス株式会社 | Optical pulse generation device and optical pulse generation method |
-
2022
- 2022-11-25 CN CN202211491086.3A patent/CN115579723B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535018A (en) * | 2019-10-10 | 2019-12-03 | 深圳大学 | A kind of tunable broad band intermediate infrared laser system |
| CN115377786A (en) * | 2022-10-27 | 2022-11-22 | 武汉中科锐择光电科技有限公司 | System and method for improving laser pulse time domain contrast |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115579723A (en) | 2023-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chou et al. | Adaptive RF-photonic arbitrary waveform generator | |
| CN115579723B (en) | Time domain and spectrum shape controllable pulse train generation system and method | |
| CN204156284U (en) | A kind of MOPA fiber laser | |
| CN106848825B (en) | The method for generating super flat frequency comb by cascading optical modulator | |
| CN110915079B (en) | Dynamic seeding of laser amplifier systems | |
| Atkins et al. | All-optical pulse rate multiplication using fractional Talbot effect and field-to-intensity conversion with cross-gain modulation | |
| Witte et al. | Numerical simulations for performance optimization of a few-cycle terawatt NOPCPA system | |
| US10901295B2 (en) | Arbitrary pulse shaping with picosecond resolution over multiple-nanosecond records | |
| EP3130044A2 (en) | System and method for generating high energy optical pulses with arbitrary waveform | |
| Maram et al. | Demonstration of input-to-output gain and temporal noise mitigation in a Talbot amplifier | |
| CN104678595B (en) | A kind of laser phase modulation method for effectively suppressing amplitude-frequency effect | |
| CN115377786B (en) | System and method for improving laser pulse time domain contrast | |
| Lee et al. | Spectral shaping of an OPCPA preamplifier for a sub-20-fs multi-PW laser | |
| CN208028366U (en) | A kind of femtosecond laser compression set based on heterojunction structure waveguide array | |
| KR102490843B1 (en) | Apparatus for generating optical signal of multi-channel | |
| JP2003149697A (en) | Method and device for realizing all-optical half adder using semiconductor optical amplifier | |
| US11323105B2 (en) | Method and system for arbitrary optical pulse generation | |
| CN203012313U (en) | Device of optical frequency comb for acquiring high-frequency wideband green light | |
| US20230387646A1 (en) | Pulsed laser with temporal coherence control | |
| CN109407351B (en) | Time lens implementation method and device and photon Fourier transformation system | |
| CN207664437U (en) | A kind of high-speed switch pulse laser | |
| CN108599855B (en) | Flexible and adjustable multi-level all-optical 2R regeneration device | |
| CN112615241A (en) | High-peak power single-frequency narrow-linewidth nanosecond triangular short pulse fiber laser | |
| Susnjar et al. | A novel common-path scheme for fourth harmonic generation by ultrashort laser pulses | |
| Kim et al. | Phase-insensitive all-optical transistors based on second-order nonlinearities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |