# US 2018/0024415 A1 · Optical parametric waveform synthesizer and method for synthesizing optical waveforms > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024415 A1 - Document ID: US20180024415A1 - Status: Published application - Kind: A1 - Application number: 15/653,957 - Filed: 2017-07-19 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Deutsches Elektronen-Synchrotron DESY - Applicants: Deutsches Elektronen-Synchrotron DESY - Inventors: Roland MAINZ; Giulio Maria ROSSI; Franz Xaver KAERTNER; Oliver D. MUECKE; Giovanni CIRMI - Web page: https://patentgrep.com/patent/US20180024415A1 ## CPC - G02F 1/39: for parametric generation or amplification of light, infrared or ultraviolet waves - G01J 3/453: by correlation of the amplitudes - G01N 21/31: Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} - G01N 21/41: Refractivity; Phase-affecting properties, e.g. optical path length (G01N21/21 takes precedence) - G02F 1/395: {in optical waveguides} - H01S 3/0057: {Temporal shaping, e.g. pulse compression, frequency chirping (soliton generation and propagation G02F1/3513, H01S3/063 and H01S3/108)} - H01S 3/1307: {Stabilisation of the phase} - G02F 1/392: {Parametric amplification} - H01S 3/0092: {Nonlinear frequency conversion, e.g. second harmonic generation [SHG] or sum- or difference-frequency generation outside the laser cavity (nonlinear frequency conversion per se G02F1/35)} - H01S 3/2383: {Parallel arrangements} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - 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 ## Abstract Parametric optical waveform synthesizer (100) creating optical waveforms (4) includes: pump source device (10); seed source device (20); optical parametric amplifier device (30) having master channel (30A) with at least one optical parametric amplifier unit (31A, 32A), and having at least one slave channel (30B, 30C), with at least one optical parametric amplifier unit (31B, 32B, 31C, 32C); beam combiner device (40), detector devices (50), and control system (60), which is configured for orthogonal control of seed source device (20) and optical parametric amplifier device (30). ## Claims ### Claim 1 An optical parametric waveform synthesizer being configured for creating optical waveforms, comprising a pump source device being arranged for creating at least one sequence of pump pulses, a seed source device being arranged for creating a sequence of master seed pulses and at least one sequence of slave seed pulses, an optical parametric amplifier device having (a) a master channel with at least one optical parametric amplifier unit being arranged for creating a sequence of master channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and the sequence of master seed pulses, and (b) at least one slave channel with at least one optical parametric amplifier unit being arranged for creating at least one sequence of slave channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and the at least one sequence of slave seed pulses, wherein the master channel and the at least one slave channel are configured such that the sequence of master channel laser pulses and the at least one sequence of slave channel laser pulses have different spectral intensity characteristics, a beam combiner device being arranged for coherently combining the master channel laser pulses and the slave channel laser pulses, thus synthesizing the optical waveforms to be obtained, detector devices being arranged for sensing a relative arrival time between the master channel laser pulses and the slave channel laser pulses at the beam combiner device, and a control system being arranged for controlling a relative temporal relationship between the master channel laser pulses and the slave channel laser pulses on a basis of output signals of the detector devices, wherein the detector devices are arranged for further sensing pulse temporal and phase properties of the master and slave seed pulses and a relative phase between the master channel laser pulses and the slave channel laser pulses at the beam combiner device, and the control system is configured for controlling the relative temporal relationship and a relative phase relationship between the master channel laser pulses and the slave channel laser pulses by an orthogonal control of the seed source device and the optical parametric amplifier device. ### Claim 2 (depends on 1) The optical parametric waveform synthesizer according to claim 1, wherein the detector devices comprise at least one carrier-envelope phase (CEP) sensor being arranged for sensing carrier-envelope phases (CEPs) of the master and slave seed pulses, at least one phase difference sensor each being arranged for sensing the relative phase between the master channel laser pulses and the slave channel laser pulses of the at least one slave channel at the beam combiner device, and at least one first relative arrival time sensor being arranged for sensing the relative arrival time between the master channel laser pulses and the slave channel laser pulses of the at least one slave channel at the beam combiner device, and the control system is configured for simultaneously creating control signals controlling at least the following parameters CEPs of the master and slave seed pulses, a temporal relationship between the master channel laser pulses and the slave channel laser pulses, via acting on slave delay lines in a beam path of the pump pulses in the at least one optical parametric amplifier unit of the at least one slave channel, and a phase relationship between the master channel laser pulses and the slave channel laser pulses, via acting on slave delay lines in the beam path of seed pulses or amplified seed pulses in the at least one optical parametric amplifier unit of the at least one slave channel. ### Claim 3 (depends on 2) The optical parametric waveform synthesizer according to claim 2, wherein the at least one CEP sensor comprises an Nf-Mf beating sensor (N and M: unequal integers) being arranged for sensing beating signals between spectral components of at least one of the master and slave seed pulses, the at least one phase difference sensor comprises an f-Nf spectral domain beating sensor, with N=0, 1, 2, . . . , being arranged for sensing beating signals between spectral components of the master channel laser pulses and the slave channel laser pulses of the at least one slave channel, and the at least one first relative arrival time sensor comprises a correlation sensor being arranged for measuring an arrival time difference between the master channel laser pulses and the slave channel laser pulses. ### Claim 4 (depends on 2) The optical parametric waveform synthesizer according to claim 2, wherein the control system includes an orthogonalized control matrix being arranged for creating the control signals. ### Claim 5 (depends on 2) The optical parametric waveform synthesizer according to claim 2, wherein each of the at least one slave channel includes multiple optical parametric amplifier units and the control system is configured for controlling the temporal relationship between the master channel laser pulses and the slave channel laser pulses, via acting on the slave delay lines in the beam path of the pump pulses in a last optical parametric amplifier unit of the at least one slave channel, and the phase relationship between the master channel laser pulses and the slave channel laser pulses, via acting on the slave delay lines in the beam path of the seed pulses in the last optical parametric amplifier unit of the at least one slave channel. ### Claim 6 (depends on 5) The optical parametric waveform synthesizer according to claim 5, wherein the master channel includes a master channel control device being configured for stabilizing the spectral intensity characteristics and the CEP of the master channel laser pulses. ### Claim 7 (depends on 6) The optical parametric waveform synthesizer according to claim 6, wherein the detector devices comprise a spectrometer device being arranged for sensing a spectral intensity of amplified master seed pulses or amplified master channel laser pulses at an output of one of multiple optical parametric amplifier units of the master channel, and a second relative arrival time sensor being arranged for sensing a relative arrival time of amplified master seed pulses and the pump pulses at the last optical parametric amplifier unit of the master channel, wherein the master channel control device is configured for stabilizing the spectral intensity characteristics and the CEP of the master channel laser pulses on the basis of output signals of the spectrometer device and the second relative arrival time sensor. ### Claim 8 (depends on 1) The optical parametric waveform synthesizer according to claim 1, wherein the seed source device comprises one single white-light pulse source being arranged for creating a sequence of broadband pulses and a beam separator device being arranged for spectrally selectively separating the sequence of broadband pulses to the sequences of master and slave seed pulses, the detector devices comprise one single carrier-envelope phase (CEP) sensor being arranged for sensing a CEP of the broadband pulses, and the control system is configured for adjusting and stabilizing the CEP of the broadband pulses. ### Claim 9 (depends on 1) The optical parametric waveform synthesizer according to claim 1, wherein the control system has at least one of the features the control system is adapted for conducting a feedback control or a feedforward control, and the control system is adapted for changing set points of the parametric waveform synthesizer for generating a desired optical waveform. ### Claim 10 (depends on 1) The optical parametric waveform synthesizer according to claim 1, wherein the seed source device is arranged for creating multiple sequences of slave seed pulses, the optical parametric amplifier device includes multiple slave channels each with at least one optical parametric amplifier unit being arranged for creating a sequence of slave channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and one of the sequences of slave seed pulses. ### Claim 11 A method of synthesizing optical waveforms, comprising the steps of creating at least one sequence of pump pulses with a pump source device, creating a sequence of master seed pulses and at least one sequence of slave seed pulses with a seed source device, creating a sequence of master channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and the master seed pulses in a master channel with at least one optical parametric amplifier unit and creating at least one sequence of slave channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and the slave seed pulses in at least one slave channel with at least one optical parametric amplifier unit, wherein the sequence of master channel laser pulses and the at least one sequence of slave channel laser pulses have different spectral intensity characteristics, coherently combining the master channel laser pulses and the slave channel laser pulses with a beam combiner device, thus synthesizing optical waveforms to be obtained, sensing a relative arrival time between the master channel laser pulses and the slave channel laser pulses at the beam combiner device, using detector devices, and controlling the relative temporal relationship between the master channel laser pulses and the slave channel laser pulses on a basis of output signals of the detector devices by a control system, wherein the method includes the further steps of sensing pulse temporal and phase properties of the master and slave seed pulses and a relative phase between the master channel laser pulses and the slave channel laser pulses at the beam combiner device, using the detector devices, and controlling a relative temporal relationship and a relative phase relationship between the master channel laser pulses and the slave channel laser pulses by an orthogonal control of the seed source device and an optical parametric amplifier device. ### Claim 12 (depends on 11) The method according to claim 11, wherein the detector devices comprise at least one carrier-envelope phase (CEP) sensor being arranged for sensing the carrier-envelope phases (CEPs) of the master and slave seed pulses, at least one phase difference sensor each being arranged for sensing the relative phase between the master channel laser pulses and the slave channel laser pulses of the at least one slave channel at the beam combiner device, and at least one first relative arrival time sensor being arranged for sensing the relative arrival time between the master channel laser pulses and the slave channel laser pulses of the at least one slave channel at the beam combiner device, and the control system simultaneously creates control signals controlling at least the following parameters the CEPs of the master and slave seed pulses, a temporal relationship between the master channel laser pulses and the slave channel laser pulses, via acting on slave delay lines in a beam path of the pump pulses in the at least one optical parametric amplifier unit of the at least one slave channel, and a phase relationship between the master channel laser pulses and the slave channel laser pulses, via acting on slave delay lines in the beam path of the seed pulses or amplified seed pulses in the at least one optical parametric amplifier unit of the at least one slave channel. ### Claim 13 (depends on 12) The method according to claim 12, wherein the control system includes an orthogonalized control matrix being arranged for creating the control signals. ### Claim 14 (depends on 12) The method according to claim 12, wherein each of the master channel and the at least one slave channel includes multiple optical parametric amplifier units and the control system simultaneously controls the temporal relationship between the master channel laser pulses and the slave channel laser pulses, via acting on the slave delay lines in the beam path of the pump pulses in a last optical parametric amplifier unit of the at least one slave channel, and the phase relationship of the master channel laser pulses with the slave channel laser pulses, via acting on the slave delay lines in the beam path of the seed pulses in the last optical parametric amplifier unit of the at least one slave channel. ### Claim 15 (depends on 12) The method according to claim 12, further comprising the step of stabilizing the spectral intensity characteristics and the CEP of the master channel laser pulses by a master channel control device. ### Claim 16 (depends on 15) The method according to claim 15, comprising the steps of sensing a spectral intensity of amplified master seed pulses at a last one of multiple optical parametric amplifier units of the master channel with a spectrometer device, and sensing a relative arrival time of amplified master seed pulses and the pump pulses at the last optical parametric amplifier unit of the master channel with a second relative arrival time sensor, wherein the master channel control device stabilizes the spectral intensity characteristics and the CEP of the master channel laser pulses on the basis of output signals of the spectrometer device and the second relative arrival time sensor. ### Claim 17 (depends on 11) The method according to claim 11, including at least one of the features the control system conducts a feedback control or a feedforward control, and the control system changes set points for generating a desired optical waveform. ### Claim 18 (depends on 11) The method according to claim 11, comprising the steps of creating multiple sequences of slave seed pulses with the seed source device, and creating multiple sequences of slave channel laser pulses by non-linear optical interactions using one of the at least one sequence of pump pulses and one of the sequences of slave seed pulses.