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公开(公告)号：US20240255829A1
公开(公告)日：2024-08-01
申请号：US18427721
申请日：2024-01-30
申请人： Cornell University
发明人： Jeffrey A. Moses , Noah Flemens , Nuno Vinicius
CPC分类号： G02F1/354 , G02F1/3548 , G02F1/3553 , G02F1/3558 , G02F1/37 , H01S3/0092
摘要： A third-harmonic generation method includes frequency-quadrupling a fundamental optical beam via cascaded second-harmonic generation to yield a fourth-harmonic optical beam. The method also includes down-converting the fourth-harmonic optical beam to yield a third-harmonic optical beam. A third harmonic generator includes a monolithic optical element having nonzero quadratic electric susceptibility to (i) frequency-quadruple a fundamental optical beam via cascaded second-harmonic generation, and (ii) down-convert a fourth-harmonic optical beam to yield a third-harmonic optical beam.
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公开(公告)号：US11916351B2
公开(公告)日：2024-02-27
申请号：US17263686
申请日：2019-07-26
发明人： Yushi Kaneda
CPC分类号： H01S5/0092 , H01S5/0617 , H01S5/0653 , H01S5/06808 , H01S5/141 , G02F1/354 , G02F1/3507 , G02F1/3551
摘要： Methods, devices and systems for improving single-frequency operation of diode lasers are described. One such method includes ramping up an operational current of a diode laser for a first predetermined number of steps, and measuring an associated current value indicative of optical power within the laser diode for each of the first predetermined number of steps. Next, operational current of the diode laser is ramped down for a second predetermined number of steps, and an associated current value indicative of optical power within the laser diode is measured for each of the second predetermined number of steps. Using the measured data current values at which a mode hop or a multimode operation is likely to occur are identified, and a contiguous range of operating currents that is devoid of identified likely mode hops or multimode regions of operation is determined as the operating current range of the diode laser.
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公开(公告)号：US20240036435A1
公开(公告)日：2024-02-01
申请号：US18038668
申请日：2021-11-26
发明人： John C. Travers , Federico Belli
CPC分类号： G02F1/397 , G02F1/354 , G02F1/3538 , G02F1/392 , G02F1/395 , G02F1/3528 , G02B6/02328 , H01S3/094015 , H01S3/1083
摘要： An optical parametric oscillator (OPO) system comprises an optical waveguide including a hollow core containing a fluid, wherein the optical waveguide is configured to receive pump light and to convert the pump light into signal light and idler light via a third order non-linear optical effect. The OPO system further comprises an optical feedback arrangement for recycling at least a portion of the signal light and/or for recycling at least a portion of the idler light in an optical cavity that includes the optical waveguide. The OPO system may be used, in particular though not exclusively, in metrology, gas and solid-state spectroscopy, laser-assisted manufacturing, semiconductor technology, biomedicine, healthcare, and scientific laboratory use.
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公开(公告)号：US12044951B2
公开(公告)日：2024-07-23
申请号：US17769725
申请日：2020-10-07
CPC分类号： G02F1/354 , G02F1/355 , G03F7/70033 , G03F7/706847
摘要： Disclosed is an illumination source comprising a gas delivery system comprising a gas nozzle. The gas nozzle comprises an opening in an exit plane of the gas nozzle. The gas delivery system is configured to provide a gas flow from the opening for generating an emitted radiation at an interaction region. The illumination source is configured to receive a pump radiation having a propagation direction and to provide the pump radiation in the gas flow. A geometry shape of the gas nozzle is adapted to shape a profile of the gas flow such that gas density of the gas flow first increases to a maximum value and subsequently falls sharply in a cut-off region along the propagation direction.
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公开(公告)号：US11906668B2
公开(公告)日：2024-02-20
申请号：US17513563
申请日：2021-10-28
发明人： Chao Wang , Youmin Wang , Yue Lu , Lingkai Kong
IPC分类号： G01C3/08 , G01S7/484 , H01S3/23 , H01S3/00 , G02F1/35 , G02F1/355 , G02F1/37 , G01S7/481 , H01S3/067
CPC分类号： G01S7/484 , G01S7/4815 , G02F1/353 , G02F1/3551 , G02F1/37 , H01S3/0092 , H01S3/067 , H01S3/2391 , G02F1/354 , G02F2201/02
摘要： Embodiments of the disclosure provide an apparatus for emitting laser light and a system and method for detecting laser light returned from an object. The system includes a transmitter and a receiver. The transmitter includes one or more laser sources, at least one of the laser sources configured to provide a respective native laser beam having a wavelength above 1,100 nm. The transmitter also includes a wavelength converter configured to receive the native laser beams provided by the laser sources and convert the native laser beams into a converted laser beam having a wavelength below 1,100 nm. The transmitter further includes a scanner configured to emit the converted laser beam to the object in a first direction. The receiver is configured to detect a returned laser beam having a wavelength below 1,100 nm and returned from the object in a second direction.
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公开(公告)号：US20230404668A1
公开(公告)日：2023-12-21
申请号：US17840836
申请日：2022-06-15
发明人： Yunfei Cao , Joel Melnick , Changnian Han , Ann Xin
CPC分类号： A61B18/245 , G02F1/3551 , A61B2018/00577 , G02F1/3503 , G02F1/3507 , G02F1/354
摘要： A light processing apparatus includes a first non-linear crystal disk for transmitting a first beam of photons having a first frequency to a second beam of photons having the first frequency and a second frequency oscillating in polarization directions orthogonal to each other, the second frequency being a half of the first frequency. Further included is a waveplate for transmitting the second beam of photons to a third beam of photons by rotating polarization directions of the second beam of photons such that the photons of the first frequency and of the second frequency oscillate in the same polarization directions. A second non-linear crystal disk is configured to transmit the third beam of photons to a fourth beam of photons of the first frequency, the second frequency and a third frequency, the third frequency being approximate a third of the first frequency.
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公开(公告)号：US20240166907A1
公开(公告)日：2024-05-23
申请号：US18279646
申请日：2022-02-28
发明人： Marco PECCIANTI , Alan DALTON , Sean OGILVIE , Alessia PASQUAZI , Juan Sebastian Totero GONGORA , Antonio CUTRONA , Luke PETERS , Jacob TUNESI , Vittorio CECCONI
CPC分类号： C09D11/52 , C09D11/38 , G02F1/354 , G02F1/3556 , G02F2203/13
摘要： There is disclosed a method of generating terahertz radiation which comprises: (a) depositing an ink on a substrate (2), wherein the ink comprises particles (3) of a semiconductor; (b) allowing the ink to form a coating; (c) shining a laser onto the coating so as to generate terahertz radiation.
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公开(公告)号：US11719993B2
公开(公告)日：2023-08-08
申请号：US17415090
申请日：2019-12-18
发明人： Valentin Gapontsev , Aleksander Cherepakhin , Anatolii Zamkov , Nikolay Evtikhiev , Dan Perlov , Aleksander Zaytsev , Andrey Sadovskiy , Nikita Radionov
IPC分类号： G02F1/355 , G02F1/37 , G02F1/39 , H01S3/00 , H01S3/11 , H01S3/23 , G02F1/35 , G02F1/377 , H01S3/109
CPC分类号： G02F1/3551 , G02F1/3501 , G02F1/353 , G02F1/354 , G02F1/355 , G02F1/3558 , G02F1/37 , G02F1/3775 , G02F1/39 , H01S3/0092 , H01S3/109 , H01S3/11 , H01S3/2308
摘要： The disclosed laser system is configured with a laser source outputting light at a fundamental frequency. The output light is incident on a frequency converter operative to convert the fundamental frequency to a higher harmonic including at least one frequency converting stage. The frequency converter is based on a SrB4O7 (SBO) or PbB4O7 (PBO) nonlinear crystal configured with a plurality of domains. The domains have periodically alternating polarity of the crystal axis enabling a QPM use and formed with each with highly parallel walls which deviate from one another less than 1 micron over a 10 mm distance.
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公开(公告)号：US20230219171A1
公开(公告)日：2023-07-13
申请号：US18180495
申请日：2023-03-08
申请人： Gigaphoton Inc.
发明人： Yasufumi KAWASUJI , Akira SUWA , Yasuhiro ADACHI
IPC分类号： B23K26/382 , H01S3/225 , G02F1/35 , H01S3/109 , H01S3/00 , B23K26/0622 , B23K26/402 , C03B33/08
CPC分类号： B23K26/382 , H01S3/2256 , G02F1/354 , H01S3/109 , H01S3/0057 , B23K26/0622 , B23K26/402 , C03B33/082 , B23K2103/54
摘要： A glass processing method according to a viewpoint of the present disclosure includes generating a pulse laser beam by using a laser oscillator, and irradiating alkali-free glass to be processed with the pulse laser beam. The wavelength of the pulse laser beam ranges from 248 nm to 266 nm, and the pulse laser beam has an energy ratio greater than or equal to 91% but smaller than or equal to 99% in the region from 5 ns after a pulse rises to 400 ns.
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公开(公告)号：US11662644B2
公开(公告)日：2023-05-30
申请号：US16088503
申请日：2017-03-29
发明人： Andrei Babushkin , Andrey Bordenyuk
CPC分类号： G02F1/353 , G02F1/3501 , G02F1/3551 , G02F1/37 , H01S3/0092 , G02F1/3503 , G02F1/354 , G02F1/3507 , G02F1/3509 , H01S3/06754 , H01S3/0941 , H01S3/2308
摘要： A frequency conversion laser system is configured with a single mode (SM) laser source outputting a pulsed pump beam at a fundamental frequency and a nonlinear optical system operating to convert the fundamental frequency sequentially to a second harmonic (SH) and then third harmonic (TH). The nonlinear optical system includes an elongated SHG crystal traversed by the SM pulsed pump beam which generates the SH beam. The SHG crystal has an output surface inclined relative to a longitudinal axis of the SHG crystal at a first wedge angle different from a right angle. The nonlinear optical system further has an elongated THG crystal with an input surface which is impinged upon by a remainder of the pump and SHG beams which propagate through the THG crystal at a walk-off angle therebetween to generate a third harmonic (TH) beam, the input surface of the THG crystal being inclined to a longitudinal axis of the THG crystal at a second wedge angle. The output and input surfaces of respective SHG and THG crystals are inclined so as to minimize the walk-off angle between SH and IR pointing vectors in the THG crystal thereby improving the conversion efficiency and TH output beam's ellipticity.
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