Patents by Inventor Frank Wise
Frank Wise has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230223729Abstract: A mode-lockable ring oscillator includes a gain element for amplifying an optical pulse into an amplified pulse, a nonlinear optical element for broadening the amplified pulse into a first spectrally-broadened pulse, a first optical filter for filtering the first spectrally-broadened pulse into a first filtered pulse, a passive nonlinear optical element for broadening the first filtered pulse into a second spectrally-broadened pulse, and a second optical filter for filtering the second spectrally-broadened pulse into a second filtered pulse. The first and second optical filters have passbands that partially overlap such that the ring cavity can lase CW. With these spectrally overlapping passbands, the mode-lockable ring oscillator can directly initiate single-pulse mode-locking by modulating pump power that pumps the gain element. After this modulation has stopped, the mode-lockable ring oscillator maintains this single-pulse mode-locking while the passbands remain spectrally overlapped.Type: ApplicationFiled: January 6, 2023Publication date: July 13, 2023Inventors: Henry HAIG, Pavel SIDORENKO, Frank WISE
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Publication number: 20220278498Abstract: Disclosed is a pulsed laser apparatus and method of generating a laser pulse. The apparatus includes an input coupler configured to receive pumping light from a pumping light source and a seed pulse from a seed pulse generator. The apparatus further includes a doped fiber-optic cable with an input port at a first end configured to receive the pumping light and the seed pulse. The doped fiber-optic cable amplifies the seed pulse to generate an output pulse. Along a first length of the doped fiber optic cable, the pulse spectrum broadens rapidly owing to nonlinearity. Beyond the first length in an extended portion, the output pulse shifts towards longer wavelengths and broadens in both spectral and temporal domains The apparatus also includes an output port at a second end of the doped fiber-optic cable, wherein the output pulse exits the doped fiber-optic cable at the output port.Type: ApplicationFiled: July 9, 2020Publication date: September 1, 2022Inventors: Frank Wise, Pavel Sidorenko, Walter Fu
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Patent number: 10965092Abstract: The technology disclosed in this patent document allows mode locking of both selected longitudinal and transverse modes to produce laser pulses. The laser light produced based on such mode locking exhibits a 3-dimensional mode profile based on the locked longitudinal and transverse modes.Type: GrantFiled: December 31, 2018Date of Patent: March 30, 2021Assignee: Cornell UniversityInventors: Logan Wright, Frank Wise
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Patent number: 10873172Abstract: 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.Type: GrantFiled: April 1, 2019Date of Patent: December 22, 2020Assignee: Cornell UniversityInventors: Walter Fu, Frank Wise
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Patent number: 10608400Abstract: Devices and techniques that use nonlinear optical effects in optical fiber to generate optical pulses via nonlinear optical wave mixing for various applications such as coherent Raman microscopic measurements and optical parametric oscillators. In some implementations, a tunable optical delay path is provided to cause an adjustable delay for synchronizing two optical beams of optical pulses.Type: GrantFiled: October 4, 2012Date of Patent: March 31, 2020Assignee: Cornell UniversityInventors: Frank Wise, Simon Lefrancois
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Publication number: 20190305516Abstract: The technology described in this document can be used to implement an optical device for producing optical pulses that includes an optical oscillator including at least one optical arm including at least one piece of fiber and at least one optical filter, a starting arm coupled to the at least one optical arm to generate spikes of radiation for the optical oscillator to start pulsation, and an optical switch coupled between the optical oscillator and the starting arm to connect the starting arm to the at least one optical arm to start the optical oscillator using the spikes of radiation generated by the starting arm.Type: ApplicationFiled: March 27, 2019Publication date: October 3, 2019Inventors: Frank Wise, Zhanwei Liu, Walter Fu, Pavel Sidorenko
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Publication number: 20190305506Abstract: 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.Type: ApplicationFiled: April 1, 2019Publication date: October 3, 2019Inventors: Walter Fu, Frank Wise
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Publication number: 20190207361Abstract: The technology disclosed in this patent document allows mode locking of both selected longitudinal and transverse modes to produce laser pulses. The laser light produced based on such mode locking exhibits a 3-dimensional mode profile based on the locked longitudinal and transverse modes.Type: ApplicationFiled: December 31, 2018Publication date: July 4, 2019Inventors: Logan Wright, Frank Wise
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Publication number: 20140247448Abstract: Devices and techniques that use nonlinear optical effects in optical fiber to generate optical pulses via nonlinear optical wave mixing for various applications such as coherent Raman microscopic measurements and optical parametric oscillators.Type: ApplicationFiled: October 4, 2012Publication date: September 4, 2014Applicant: CORNELL UNIVERSITYInventors: Frank Wise, Simon Lefrancois
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Patent number: 8787411Abstract: Implementations and examples of mode-locked fiber lasers based on fiber laser cavity designs that produce self-similar pulses (“similaritons”) with parabolic pulse profiles with respect to time at the output of the fiber gain media to effectuate the desired mode locking operation. An intra-cavity narrowband optical spectral filter is included in such fiber lasers to ensure the proper similariton conditions.Type: GrantFiled: June 21, 2012Date of Patent: July 22, 2014Assignee: Cornell UniversityInventors: Frank Wise, William Renninger, Andy Chong
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Patent number: 8416817Abstract: A modelocked fiber laser is designed to have strong pulse-shaping based on spectral filtering of a highly-chirped pulse in the laser cavity. The laser generates femtosecond pulses without a dispersive delay line or anomalous dispersion in the cavity.Type: GrantFiled: September 18, 2007Date of Patent: April 9, 2013Assignee: Cornell UniversityInventors: Chin Yu Chong, Joel Buckley, Frank Wise
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Publication number: 20120327960Abstract: Implementations and examples of mode-locked fiber lasers based on fiber laser cavity designs that produce self-similar pulses (“similaritons”) with parabolic pulse profiles with respect to time at the output of the fiber gain media to effectuate the desired mode locking operation. An intra-cavity narrowband optical spectral filter is included in such fiber lasers to ensure the proper similariton conditions.Type: ApplicationFiled: June 21, 2012Publication date: December 27, 2012Inventors: Frank Wise, William Renninger, Andy Chong
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Publication number: 20100220751Abstract: A modelocked fiber laser is designed to have strong pulse-shaping based on spectral filtering of a highly-chirped pulse in the laser cavity. The laser generates femtosecond pulses without a dispersive delay line or anomalous dispersion in the cavity.Type: ApplicationFiled: September 18, 2007Publication date: September 2, 2010Inventors: Chin Yu Chong, Joel Buckley, Frank Wise
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Patent number: 7436862Abstract: A laser producing high energy ultrashort laser pulses comprises a normal dispersion segment, a gain segment, an anomalous dispersion segment with negligible nonlinearity and an effective saturable absorber arranged to form a laser cavity. Each segment is optically interconnected so that a laser pulse will propagate self-similarly therein. (A pulse that propagates in a self-similar manner is sometimes referred to as a “similariton.”) With this laser the limitations of prior art laser oscillators are avoided. Also provided are means for pumping the gain medium in the laser cavity, and means for extracting laser pulses from the laser cavity. The laser cavity is preferably a ring cavity. Preferably the laser is configured to achieve unidirectional circulation of laser pulses therein. This configuration is scalable to much higher pulse energy than lasers based on soliton-like pulse shaping.Type: GrantFiled: August 28, 2006Date of Patent: October 14, 2008Assignee: Cornell Research Foundation, Inc.Inventors: Fatih Omer Ilday, Frank Wise
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Publication number: 20060291521Abstract: A laser producing high energy ultrashort laser pulses comprises a normal dispersion segment, a gain segment, an anomalous dispersion segment with negligible nonlinearity and an effective saturable absorber arranged to form a laser cavity. Each segment is optically interconnected so that a laser pulse will propagate self-similarly therein. (A pulse that propagates in a self-similar manner is sometimes referred to as a “similariton.”) With this laser the limitations of prior art laser oscillators are avoided. Also provided are means for pumping the gain medium in the laser cavity, and means for extracting laser pulses from the laser cavity. The laser cavity is preferably a ring cavity. Preferably the laser is configured to achieve unidirectional circulation of laser pulses therein. This configuration is scalable to much higher pulse energy than lasers based on soliton-like pulse shaping.Type: ApplicationFiled: August 28, 2006Publication date: December 28, 2006Inventors: Fatih Ilday, Frank Wise
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Publication number: 20050169324Abstract: A laser producing high energy ultrashort laser pulses comprises a normal dispersion segment, a gain segment, an anomalous dispersion segment with negligible nonlinearity and an effective saturable absorber arranged to form a laser cavity. Each segment is optically interconnected so that a laser pulse will propagate self-similarly therein. (A pulse that propagates in a self-similar manner is sometimes referred to as a “similariton.”) With this laser the limitations of prior art laser oscillators are avoided. Also provided are means for pumping the gain medium in the laser cavity, and means for extracting laser pulses from the laser cavity. The laser cavity is preferably a ring cavity. Preferably the laser is configured to achieve unidirectional circulation of laser pulses therein. This configuration is scalable to much higher pulse energy than lasers based on soliton-like pulse shaping.Type: ApplicationFiled: January 30, 2004Publication date: August 4, 2005Inventors: Fatih Ilday, Frank Wise, William Clark
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Patent number: 6650466Abstract: We report an optical pulse-compression technique based on quadratic nonlinear media. Negative nonlinear phase shifts are generated via phase-mismatched second-harmonic generation, and the phase-modulated pulses are then compressed by propagation through materials with normal dispersion. Millijoule-energy pulses from a Ti:sapphire amplifier are compressed from 120 to 30 fs, and calculations indicate that compression ratios>10 are realistically achievable using this approach with optimal materials. The insertion loss of the compressor can be less than 10% of the pulse energy, and scaling to higher pulse energies will be straightforward.Type: GrantFiled: August 27, 1999Date of Patent: November 18, 2003Inventors: Frank Wise, Qian Liejia, Xiang Liu