# US 10,873,172 B2 · Fiber optical parametric chirped-pulse amplification (FOPCPA) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,172 B2 - Document ID: US10873172B2 - Status: Granted - Kind: B2 - Application number: 16/372,226 - Filed: 2019-04-01 - Published: 2019-10-03 - Granted: 2020-12-22 - Earliest claimed: 2018-03-30 - Assignees: Cornell University - Applicants: Cornell University - Inventors: Walter Fu; Frank Wise - Web page: https://patentgrep.com/patent/US10873172B2 ## CPC - 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 3/1083: {using parametric generation} - G02F 1/39: for parametric generation or amplification of light, infrared or ultraviolet waves - H01S 3/067: Fibre lasers - H01S 3/06754: {Fibre amplifiers (H01S3/06708 takes precedence)} - H01S 3/08086: {Multiple-wavelength emission} - H01S 3/094003: {the pumped medium being a fibre} - H01S 3/094076: {Pulsed or modulated pumping (H01S3/1024 takes precedence)} - H01S 3/2391: {emitting at different wavelengths} - H01S 3/0057: {Temporal shaping, e.g. pulse compression, frequency chirping (soliton generation and propagation G02F1/3513, H01S3/063 and H01S3/108)} - H01S 3/0071: {Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction} - H01S 3/0078: {Frequency filtering} - H01S 3/0085: {Modulating the output, i.e. the laser beam is modulated outside the laser cavity} - H01S 3/1062: {using a controlled passive interferometer, e.g. a Fabry-Perot etalon} - H01S 3/1618: {ytterbium} - H01S 3/2308: {Amplifier arrangements, e.g. MOPA} - 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 - 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 ## Abstract The technology described in this document can be used to implement an optical device including a seed pump laser to produce pump seed laser pulses at a pump wavelength, a pulse stretcher operable to stretch a pulse duration of the pump seed laser pulses to produce stretched pump seed laser pulses, a pump fiber amplifier including one or more fiber gain media to receive the seed pump laser pulses to produce a pump laser beam of pump laser pulses, a signal laser to produce a signal laser beam at a signal wavelength different from the pump wavelength, an optical module coupled to combine the pump laser beam and the signal laser beam, and a fiber optical parametric amplifier (OPA) to cause a nonlinear parametric interaction in the nonlinear fiber medium to produce an output signal beam, an output idler laser beam at an idler wavelength, and an output pump beam. ## Claims ### Claim 1 An optical device, comprising: a seed pump laser to produce seed pump laser pulses at a pump wavelength; a pulse stretcher operable to stretch a pulse duration of the seed pump laser pulses to produce stretched seed pump laser pulses; a pump fiber amplifier including one or more fiber gain media to receive the stretched seed pump laser pulses to produce a pump laser beam of pump laser pulses that are amplified in energy in comparison with the stretched seed pump laser pulses; a signal laser to produce a signal laser beam at a signal wavelength different from the pump wavelength; an optical module coupled to combine the pump laser beam and the signal laser beam to output a combined laser beam including the pump laser beam and the signal laser beam; and a fiber optical parametric amplifier (OPA) having a nonlinear fiber medium and coupled to receive the combined laser beam from the optical module to cause a nonlinear parametric interaction in the nonlinear fiber medium under an optical pumping in a normally dispersive regime to produce an output signal beam, an output idler laser beam at an idler wavelength, and an output pump beam. ### Claim 2 (depends on 1) The device as in claim 1, wherein the signal laser includes a continuous-wave (CW) signal laser to produce a CW signal laser beam. ### Claim 3 (depends on 2) The device as in claim 2, wherein the CW signal laser is a tunable CW laser configured to tune the signal wavelength to cause the idler wavelength of the output idler laser beam to be tuned. ### Claim 4 (depends on 1) The device as in claim 1, wherein the OPA includes a dispersion-engineered fiber in which the pump laser beam and the signal laser beam are co-polarized with one another. ### Claim 5 (depends on 1) The device as in claim 1, wherein the OPA includes a photonic crystal fiber (PCF). ### Claim 6 (depends on 1) The device as in claim 1, wherein the OPA includes a polarization-maintaining fiber. ### Claim 7 (depends on 1) The device as in claim 1, wherein the OPA includes a polarization-maintaining fiber in which the pump laser beam and signal laser beam are counter-polarized with one another. ### Claim 8 (depends on 1) The device as in claim 1, wherein the signal laser beam is a continuous wave beam or a broadband, chirped pulse synchronized with the pump laser beam. ### Claim 9 A fiber optical parametric chirped-pulse amplification device, comprising: a pump laser beam generator to produce a chirped pump beam at a pump wavelength; a signal laser beam generator to produce a signal laser beam at a signal wavelength different from the pump wavelength; one or more pulse stretchers operable to temporally stretch pulse durations of at least one of the signal laser beam and the pump laser beam to produce output laser light; a fiber optical parametric amplifier (OPA) including a fiber medium and coupled to the one or more pulse stretchers to receive the output laser light from the one or more pulse stretchers to cause a nonlinear parametric interaction in the fiber medium due to presence of laser light at the pump wavelength and laser light at the signal wavelength to produce an output signal laser beam at the signal wavelength, an output idler laser beam at an idler wavelength, and an output pump laser beam at the pump wavelength; and a pulse compressor operable to shorten a pulse duration of one or both of the output signal laser beam and the output idler laser beam. ### Claim 10 (depends on 9) The device as in claim 9, wherein the signal laser beam is a continuous-wave laser beam. ### Claim 11 (depends on 9) The device as in claim 9, wherein the signal laser beam is a broadband, chirped pulse synchronized with the pump laser beam. ### Claim 12 (depends on 9) The device as in claim 9, wherein the OPA includes a dispersion-engineered fiber in which the pump laser beam and the signal laser beam are co-polarized with one another. ### Claim 13 (depends on 9) The device as in claim 9, wherein the OPA includes a photonic crystal fiber (PCF). ### Claim 14 (depends on 9) The device as in claim 9, wherein the OPA includes a polarization-maintaining fiber. ### Claim 15 (depends on 9) The device as in claim 9, wherein the OPA includes a polarization-maintaining fiber in which the pump laser beam and signal laser beam are counter-polarized with one another. ### Claim 16 A fiber optical parametric chirped-pulse amplification device, comprising: a pump laser beam generator to produce a chirped pump laser beam having chirped pump laser pulses at a pump wavelength; a pulse scale adjuster coupled to receive the chirped pump laser beam at the pump wavelength and an input signal laser beam having seed laser pulses at a signal wavelength different from the pump wavelength to temporally adjust pulse durations of the signal laser beam and the chirped pump laser beam to output an adjusted signal laser beam and an adjusted pump laser beam; a fiber optical parametric amplifier (OPA) including a fiber medium and coupled to the pulse scales adjuster to receive the adjusted signal laser beam and the adjusted pump laser beam to cause a nonlinear parametric interaction in the fiber medium to produce an output signal laser beam at the signal wavelength, an output idler laser beam having output idler laser pulses at an idler wavelength, and an output pump laser beam at the pump wavelength; and a pulse compressor operable to shorten a pulse duration of one or both of the output signal laser beam and the output idler laser beam, wherein the output signal laser beam is fed back from the OPA to the pulse scale adjuster to be used as the input signal laser beam to the pulse scale adjuster. ### Claim 17 (depends on 16) The device as in claim 16, wherein the OPA includes a dispersion-engineered fiber in which the pump laser beam and the signal laser beam are co-polarized with one another. ### Claim 18 (depends on 16) The device as in claim 16, wherein the OPA includes a photonic crystal fiber (PCF). ### Claim 19 (depends on 16) The device as in claim 16, wherein the OPA includes a polarization-maintaining fiber. ### Claim 20 (depends on 16) The device as in claim 16, wherein the OPA includes a polarization-maintaining fiber in which the pump laser beam and signal laser beam are counter-polarized with one another.