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公开(公告)号：US20240291219A1
公开(公告)日：2024-08-29
申请号：US18656729
申请日：2024-05-07
申请人： Gigaphoton Inc. , Inter-University Research Institute Corporation, National Institutes of Natural Sciences
发明人： Yuki TAMARU , Taisuke MIURA , Ryo YASUHARA
IPC分类号： H01S3/00 , G02B17/02 , G02B17/06 , G02B27/28 , G02F1/01 , G02F1/09 , G03F7/00 , G03F7/20 , H01S3/225
CPC分类号： H01S3/0057 , G02B17/023 , G02B17/0663 , G02B27/288 , G02F1/0136 , G02F1/092 , G03F7/2008 , G03F7/70025 , G03F7/70041 , G03F7/70566 , H01S3/225
摘要： An optical pulse stretcher that stretches a pulse width of a pulse laser beam includes a polarizer configured to separate a component in a specific polarization direction of the pulse laser beam that has entered, a delay optical system including a plurality of mirrors through which the pulse laser beam reflected by or transmitted through the polarizer is propagated; and a first Faraday rotator that includes a first magnet and a first Faraday material and is disposed on an optical path of the delay optical system to rotate a polarization direction of the pulse laser beam.
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公开(公告)号：US20240274221A1
公开(公告)日：2024-08-15
申请号：US18455198
申请日：2023-08-24
发明人： Bum Jin JANG , Do Hyeok BAE
摘要： An apparatus for measuring the magneto-optical Kerr effect (MOKE) of a specimen requiring analysis of magnetic properties, such as a magnetic random access memory (MRAM) or electrical steel sheet, is disclosed. The disclosed MOKE measuring device includes a rotational chuck on which a MOKE measurement target is disposed and which rotates the MOKE measurement target, a first magnetic field generator including a first coil spaced apart from the rotational chuck and tilted at a predetermined angle with respect to the rotational chuck, and configured to generate a magnetic field, a second magnetic field generator including a second coil spaced apart from the rotational chuck and tilted at a predetermined angle with respect to the rotational chuck, and configured to generate a magnetic field, and a frame to which the first and second magnetic field generators are fixed.
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公开(公告)号：US20240118564A1
公开(公告)日：2024-04-11
申请号：US18285686
申请日：2022-03-28
发明人： Akira YAHAGI , Shinji MAKIKAWA
CPC分类号： G02F1/093 , G02B27/283
摘要： An optical isolator for a wavelength band of 400 to 470 nm includes: a Faraday rotator having a Verdet constant equal to or greater than 750 Rad/T·m at a wavelength of 400 nm to 470 nm; and a hollow magnet provided on an outer periphery of the Faraday rotator, wherein a magnetic flux density B(T) applied to the Faraday rotator is within the range of the following formula (1), and an optical path length L(cm) over which the Faraday rotator is provided is within the range of the following formula (2): B≤0.40 (1); 0.26≤L≤0.50 (2). Thus, a miniaturized optical isolator which is transparent at violet and blue wavelengths of 400 to 470 nm is provided.
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公开(公告)号：US20240103306A1
公开(公告)日：2024-03-28
申请号：US18370954
申请日：2023-09-21
CPC分类号： G02F1/094 , G02F1/0121
摘要： Suspensions of magneto-responsive Janus colloids form chains and undergo alignment under the influence of a magnetic field. When the magnetic field is aligned with a light path, light transmission through the sample increases as compared to randomly or orthogonally oriented chains. The emissivity response of this suspension is presented as a function of particle concentration and magnetic field strength. A variation of the Beer-Lambert model and ray-tracing simulations capture the behavior of the experimentally measured difference in intensity between magnetically activated and non-activated Brownian suspensions. Experiments demonstrate up to 25% contrast in transmission of visible light, which may be further optimized through materials selection. Similar experiments when these Janus particle chains are suspended in carbon tetrachloride, demonstrate an emissivity variation in the near infrared of ˜10%.
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公开(公告)号：US11808577B2
公开(公告)日：2023-11-07
申请号：US17780668
申请日：2020-09-24
发明人： Ryotaro Inoue , Mikio Kozuma , Atsushi Tanaka
CPC分类号： G01C19/721 , G01C19/58 , G01P3/36 , G01P15/14 , G02F1/11 , G02F2/02 , G02F1/093 , G02F2201/02
摘要： An atomic interferometer includes: an optical system including an optical modulating device that includes: an optical fiber for a first laser beam to propagate therein; and a frequency shifter connected to the optical fiber and configured to shift the frequency of the first laser beam, the optical system being configured to generate a moving standing light wave from counter-propagation of the first laser beam from the optical modulating device and a second laser beam; and an interference system for making an atomic beam interact with three or more moving standing light waves including the moving standing light wave.
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公开(公告)号：US20230317325A1
公开(公告)日：2023-10-05
申请号：US18025234
申请日：2021-08-26
发明人： Takuto Matsumoto , Masanori Ikari , Keita Tanaka
CPC分类号： H01F1/0018 , C04B35/44 , G02F1/0036 , C04B41/0072 , G02F1/09 , C04B2235/764 , C04B2235/9653 , C04B2235/78 , C04B2235/3224 , C04B2235/3222
摘要： A paramagnetic garnet-type transparent ceramic that exhibits a high laser damage threshold, said ceramic being a sintered body of a Tb-containing rare earth-aluminum garnet represented by formula (1), and being characterized in that the average sintered grain size is 10-40 μm, and the insertion loss at a wavelength of 1,064 nm in the optically effective region along the length direction of a 20 mm-long sample is 0.05 dB or less.
(Tb1-x-yYxScy)3(Al1-zScz)5O12 Formula (1)
(In the formula, 0≤x-
公开(公告)号：US20230296930A1
公开(公告)日：2023-09-21
申请号：US18321513
申请日：2023-05-22
IPC分类号： G02F1/09
CPC分类号： G02F1/093
摘要： An optical isolator for generally collimated laser radiation includes a single polarizing element, at least one Faraday optical element, at least one reciprocal polarization altering optical element disposed at the single polarizing element, at least one reflective optical element for reflecting radiation to provide an even number of passes through the at least one Faraday optical element, and a magnetic structure. The magnetic structure is capable of generating a magnetic field within the at least one Faraday optical element that is generally aligned with the even number of passes along a beam propagation axis. The optical isolator is configured to receive generally collimated laser radiation, which passes through the single polarizing element and the at least one reciprocal polarization altering optical element and which makes at least two passes through the at least one Faraday optical element, whereby generally collimated laser radiation is output from the optical isolator.
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公开(公告)号：US20230266598A1
公开(公告)日：2023-08-24
申请号：US18138171
申请日：2023-04-24
发明人： LONG CHEN , YU-ZHOU SUN , li-xiang Li
CPC分类号： G02B27/285 , G02F1/0136 , G02F1/093 , H04J14/02 , G02B17/0856
摘要： An optical circulator and an optical module are provided. The optical circulator includes a first polarization beam splitter member having a common optical port, a second polarization beam splitter member having an emittance optical port and at least two receiving optical ports, and a first polarization adjustment member. The two receiving optical ports respectively receive two linearly polarized light beams. The two linearly polarized light beams respectively pass through the second polarization beam splitter member, and sequentially pass through the first polarization adjustment member and the first polarization beam splitter member to be combined into a first combined light beam for being output from the common optical port. The common optical port receives a compound optical signal that passes through the first polarization beam splitter member to be split into another two linearly polarized light beams that are combined into a second combined light beam for being output.
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公开(公告)号：US11726355B2
公开(公告)日：2023-08-15
申请号：US17759431
申请日：2021-03-29
申请人： siOPTICA GmbH
发明人： Yannick Bourgin , André Heber , Markus Klippstein
CPC分类号： G02F1/092 , G02B26/005 , G02B27/0093 , G02F1/163 , G02F1/294 , G02B2207/115
摘要： An optical element including a plate-shaped substrate with a light-entrance surface and a light-exit surface, a multiplicity of imaging elements formed on the light-exit surface and a multiplicity of diaphragms formed on the light-entrance surface. Each diaphragm includes a transparent geometric region in an opaque region. The optical element can be switched between two operating modes B1 and B2 such that some of the imaging elements change their focal length between values f1 and f2 and/or, some of the diaphragms change their aperture width and/or their position. Exactly one diaphragm is associated with each imaging element in mode B1 so that light passing through the diaphragm is imaged or collimated by the associated imaging element. Consequently, light arriving in the optical element through the diaphragms and then through the light-entrance surface has, after passing through the associated imaging elements in the two operating modes B1 and B2, different propagation angles.
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公开(公告)号：US20230212783A1
公开(公告)日：2023-07-06
申请号：US17995989
申请日：2020-12-18
发明人： Toshiaki WATANABE , Satoru FUKUDA
摘要： A bismuth-substituted rare earth iron garnet single crystal suitable for Faraday rotators and optical isolators with reduced insertion loss due to suppressed valence fluctuation of Fe ions is provided. The bismuth-substituted rare earth iron garnet single crystal of the present invention is characterized by the composition formula (TbaLnbBicMg3−(a+b+c))(FedGaeTifPt5−(d+e+f))O12. In the composition formula above, 0.02≤f≤0.05, 0.02≤{3−(a+b+c)}≤0.08, and −0.01≤{3−(a+b+c)}−{f+5−(d+e+f)}≤0.01. Ln is a rare earth element and may be selected from Eu, Gd, Ho, Tm, Yb, Lu, and Y.
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