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公开(公告)号：US20190221987A1
公开(公告)日：2019-07-18
申请号：US16334417
申请日：2016-09-20
申请人： NEC Corporation
发明人： Emmanuel LE TAILLANDIER DE GABORY , Shigeru NAKAMURA , Shigeyuki YANAGIMACHI , Keiichi MATSUMOTO
CPC分类号： H01S3/06737 , G02B6/02 , H01S3/0064 , H01S3/06758 , H01S3/094007 , H01S3/094065 , H01S3/094069 , H01S3/09415 , H01S3/10007 , H01S3/10015 , H01S3/1301 , H01S3/1302 , H01S3/1608
摘要： To solve the problem that the power consumption of optical amplifiers is not optimized over the life time of an amplifier, the optical amplifier includes a gain medium for amplifying a plurality of optical channels, the gain medium including a plurality of cores through which the plurality of optical channels to propagate respectively and a cladding area surrounding the plurality of cores, a monitor that monitors the temperature of the optical amplifier and producing a monitoring result, a first light source that emits a first light beam to excite the cladding area, a second light source that emits a plurality of second light beams to excite each of the plurality of cores individually, and a controller that controls the first light source and the second light source based on the produced monitoring result.
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公开(公告)号：US20180261971A1
公开(公告)日：2018-09-13
申请号：US15911475
申请日：2018-03-05
发明人： Fatih YAMAN , Shaoliang ZHANG , Eduardo Mateo RODRIGUEZ , Kohei NAKAMURA , Takanori INOUE , Yoshihisa INADA
CPC分类号： H01S3/094023 , H01S3/0064 , H01S3/0078 , H01S3/06766 , H01S3/0677 , H01S3/06787 , H01S3/094011 , H01S3/1608 , H01S3/2383 , H01S2301/02
摘要： Aspects of the present disclosure describe systems, methods, and structures for providing bidirectional C-band and L-band transmission employing optical circulators which advantageously eliminates C\L WDM couplers while still blocking any backward amplified spontaneous emissions from optical amplifiers.
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公开(公告)号：US20180063935A1
公开(公告)日：2018-03-01
申请号：US15790576
申请日：2017-10-23
CPC分类号： H05G2/008 , H01S3/0064 , H01S3/2232 , H01S3/2308 , H01S3/2391 , H05G2/003
摘要： An optical source for a photolithography tool includes a source configured to emit a first beam of light and a second beam of light, the first beam of light having a first wavelength, and the second beam of light having a second wavelength, the first and second wavelengths being different; an amplifier configured to amplify the first beam of light and the second beam of light to produce, respectively, a first amplified light beam and a second amplified light beam; and an optical isolator between the source and the amplifier, the optical isolator including: a plurality of dichroic optical elements, and an optical modulator between two of the dichroic optical elements.
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公开(公告)号：US09882335B2
公开(公告)日：2018-01-30
申请号：US15373927
申请日：2016-12-09
发明人： Yusong Yin , Andrea Burzo , Sergiy Nazarenko
CPC分类号： H01S3/0085 , H01S3/0064 , H01S3/137 , H01S3/2308
摘要： A mode locked laser supplies a high repetition seed pulse train along a seed beam path to a pulse picker having at least one polarizer. A Faraday rotator in optical communication with the seed beam rotates the polarization of the seed beam by about 45°. A double pass acousto optical modulator (AOM) receives the seed beam propagating through the Faraday rotator and diffracts the seed beam into a first order first pass beam and a zero order first pass beam. A reflector returns the first pass first order beam into the acousto optical modulator for a second pass. The modulator diffract the beam into a zero order second pass beam and a first order second pass diffracted beam, the first order second pass beam propagating on the substantially same path as the incoming seed beam but in the opposite direction.
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公开(公告)号：US20170310070A1
公开(公告)日：2017-10-26
申请号：US15512607
申请日：2015-07-22
申请人： FEHA Lasertec GmbH
发明人： Gisbert Staupendahl
CPC分类号： H01S3/117 , G02B27/0966 , H01S3/005 , H01S3/0064 , H01S3/0071 , H01S3/10 , H01S3/11 , H01S3/127 , H01S3/2232
摘要： A Q-switched CO2 laser material processing system with acousto-optic modulators (AOM) is employed, on the one hand, inside the resonator for Q-switching the CO2 laser and, on the other hand, externally for efficient suppression of the radiation feedback between a laser and workpiece. The frequency shift of the radiation diffracted at the AOM is taken into account which exactly corresponds to the excitation frequency of the acoustic wave in the AOM crystal under the aspect of the amplification of the radiation in the active medium. Since this frequency shift significantly reduces the amplification of the radiation, it has to be avoided in the Q-switching process, which is achieved, by means of a tandem of two AOMs with identical excitation frequencies but with the acoustic waves propagating in opposite directions in the crystal. The frequency shift advantageously suppresses radiation feedback between the laser and workpiece.
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6.发明授权公开(公告)号：US09778495B2
公开(公告)日：2017-10-03
申请号：US14534907
申请日：2014-11-06
发明人： Toshiaki Watanabe
IPC分类号： G02F1/09 , H01S3/00 , C04B35/553 , G02B1/00
CPC分类号： G02F1/093 , C04B35/553 , C04B2235/3208 , C04B2235/3224 , G02B1/00 , H01S3/0064
摘要： A translucent sintered body having the following basic composition: Ca(1−x)YbxF(2+x), where 0.4≦x≦1.0, or preferably Ca(1−x−y)YbxRyF(2+x+y), 0.4≦x≦1.0, 0≦y≦0.5 wherein R is at least one element selected from Ce, Pr, Sm, Eu and Y.
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公开(公告)号：US09711929B1
公开(公告)日：2017-07-18
申请号：US15358869
申请日：2016-11-22
申请人： LiComm Co., Ltd.
发明人： Sung Jun Kim , Jeong Mee Kim , Soo Young Yoon , Jung Kwon Lee
CPC分类号： H01S3/06704 , G02B6/4215 , G02B6/4246 , G02B6/4262 , G02B6/4286 , H01S3/0064 , H01S3/06754 , H01S3/094003
摘要： An apparatus comprising a case, an optical amplifier, and an optical transceiver is provided. The optical amplifier and the optical transceiver are included in the case. The case includes a top portion and a bottom portion. The top portion includes first to third sections arranged in a direction perpendicular to a direction extending from the top portion to the bottom portion. The first section has a larger area than the third section and the second section divides the first and third sections. The third section includes a first cavity including at least one portion of the optical amplifier. The optical amplifier is provided using at least one of an amplifying fiber, a pumping light source, an isolator, a wavelength-division multiplexer (WDM) coupler, a wavelength-variable optical filter, a monitoring-tap photo diode, and a driving control unit.
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公开(公告)号：US09684223B2
公开(公告)日：2017-06-20
申请号：US14616531
申请日：2015-02-06
发明人： Yukihiro Inoue , Dmitry Churin , Khanh Kieu
CPC分类号： G02F1/395 , G02F2001/392 , H01S3/0064 , H01S3/0078 , H01S3/0092 , H01S3/06758 , H01S3/1608 , H01S3/1618 , H01S3/2333
摘要： An optical apparatus that includes an optical source that generates a first optical pulse with a first optical wavelength. The optical apparatus also includes an optical amplifier that outputs an amplified pulse. The optical apparatus also includes a first waveguide that is connected to the optical amplifier and a second waveguide. Wherein the second waveguide converts the energy of the amplified pulse into energy of a second pulse that has a second optical wavelength different from the first optical wavelength. Wherein, the following equation is satisfied: L_min≦L≦π/γP. In which a length of the first waveguide is L, a nonlinear coefficient of the first waveguide is γ, a peak power of the amplified pulse as it is received by the first waveguide is P, and a minimum length of the first waveguide is L_min or L is equal to zero.
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公开(公告)号：US09638638B2
公开(公告)日：2017-05-02
申请号：US14890109
申请日：2014-05-09
IPC分类号： G01J3/44 , G01N21/65 , H01S3/067 , H01S3/10 , H01S3/23 , H01S3/30 , H01S3/0941 , H01S3/16 , H01S3/00 , H01S3/094
CPC分类号： G01N21/65 , G01J3/44 , G01J3/4412 , G01N2021/655 , G01N2201/06113 , G01N2201/0683 , G01N2201/0697 , H01S3/0064 , H01S3/0078 , H01S3/06758 , H01S3/094069 , H01S3/09415 , H01S3/10015 , H01S3/1618 , H01S3/2391 , H01S3/302
摘要： Disclosed herein is a system (10) for measuring light induced transmission or reflection changes, in particular due to stimulated Raman emission. The system comprises a first light source (12) for generating a first light signal having a first wavelength, a second light source (14) for generating a second light signal having a second wavelength, an optical assembly (16) for superposing said first and second light signals at a sample location (18), and a detection means (24) for detecting a transmitted or reflected light signal, in particular a stimulated Raman signal caused by a Raman-active medium when located at said sample location. Here in at least one of the first and second light sources (12, 14) is one or both of actively controllable to emit a time controlled light pattern or operated substantially in CW mode and provided with an extra cavity modulation means (64) for generating a time controlled light pattern. The detection means (24) is capable of recording said transmitted or reflected light signal, in particular stimulated Raman signal, as a function of time.
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公开(公告)号：US20170099721A1
公开(公告)日：2017-04-06
申请号：US14970402
申请日：2015-12-15
IPC分类号： H05G2/00
CPC分类号： H05G2/008 , H01S3/0064 , H01S3/2232 , H01S3/2308 , H01S3/2391 , H05G2/003
摘要： An optical source for a photolithography tool includes a source configured to emit a first beam of light and a second beam of light, the first beam of light having a first wavelength, and the second beam of light having a second wavelength, the first and second wavelengths being different; an amplifier configured to amplify the first beam of light and the second beam of light to produce, respectively, a first amplified light beam and a second amplified light beam; and an optical isolator between the source and the amplifier, the optical isolator including: a plurality of dichroic optical elements, and an optical modulator between two of the dichroic optical elements.
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