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公开(公告)号：US09618713B2
公开(公告)日：2017-04-11
申请号：US14764714
申请日：2014-01-21
发明人： Miki Okamura , Tokutaka Hara
IPC分类号： G02B6/42 , G02B6/30 , G02B6/32 , G02B6/27 , G02F1/035 , G02F1/03 , G02F1/225 , G02F1/01 , G02F1/21
CPC分类号： G02B6/4266 , G02B6/2706 , G02B6/30 , G02B6/32 , G02F1/0136 , G02F1/0311 , G02F1/035 , G02F1/225 , G02F2001/212
摘要： An aspect of the present invention is an optical element that combines light waves using a spatial optical system, including a housing section, an optical waveguide element, a combine section, and a collimator section is provided. The housing section has a storage space and is formed by joining two or more members together. The optical waveguide element is provided in the storage space and emits at least two light waves. The combine section is provided outside the storage space and combines the light waves emitted from the optical waveguide element outside the housing section using a spatial optical system. The collimator section is connected to the housing section, holds the combine section, and includes a light focusing section configured to focus a light wave combined by the combine section and an optical fiber to which the light wave focused by the light focusing section is introduced.
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公开(公告)号：US11204507B2
公开(公告)日：2021-12-21
申请号：US16364457
申请日：2019-03-26
发明人： Tokutaka Hara , Kei Katou
摘要： A positioning member for positioning optical components includes a laminated body in which a plurality of thin metal plates is laminated. In the positioning member for positioning the optical components by an upper surface of a first plate forming the laminated body and a side surface of a second plate disposed above the first plate, a portion where two non-parallel side surfaces of the second plate for positioning the optical components cross each other includes a cutout portion including a crossing portion of the side surfaces.
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公开(公告)号：US09817293B2
公开(公告)日：2017-11-14
申请号：US15300426
申请日：2015-03-27
发明人： Tokutaka Hara , Norikazu Miyazaki
CPC分类号： G02F1/2255 , G02B6/29352 , G02B6/4215 , G02F2001/212 , G02F2201/58 , H01L31/0232
摘要： An object is to provide an optical modulator in which a light receiving element is disposed on a substrate configuring the optical modulator and which is capable of suppressing a decrease in the frequency bandwidth of the light receiving element even in a case in which two radiated lights from a combining part in a Mach-Zehnder type optical waveguide are received and monitored at the same time. The optical modulator includes a substrate 1, an optical waveguide including a Mach-Zehnder type optical waveguide formed in the substrate, and a modulation electrode (not illustrated) for modulating light waves that propagate through the optical waveguide, alight receiving element 5 is disposed to bridge over an output waveguide 24 configuring the Mach-Zehnder type optical waveguide so as to receive two radiated lights being radiated from a combining part in the Mach-Zehnder type optical waveguide, and, in the light receiving element, two or more light receiving areas (51 and 52) are formed apart from each other on a substrate of light receiving element 55.
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公开(公告)号：US10409136B2
公开(公告)日：2019-09-10
申请号：US15514505
申请日：2016-03-10
发明人： Tokutaka Hara , Norikazu Miyazaki
摘要： Provided is an optical modulator in which degradation of an extinction ratio is suppressed and a temperature drift phenomenon is suppressed.An optical modulator includes: a substrate having an electro-optic effect; an optical waveguide formed on the substrate; and a control electrode for controlling light waves propagating through the optical waveguide, in which the optical waveguide has one or more Mach-Zehnder type optical waveguides (A1 to A3 and B1 to B3), the control electrode has DC electrodes (C1 to C4) which apply DC bias, a feeder electrode which feeds DC bias to the DC electrode crosses one of two branched waveguides of the Mach-Zehnder type optical waveguide, and a first dummy electrode (a dotted line E5 or E6) is provided at a specific position on the other one of the two branched waveguides, which is a specific position symmetrical in relation to a position at which the feeder electrode crosses the one of the two branched waveguides.
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公开(公告)号：US20180284349A1
公开(公告)日：2018-10-04
申请号：US15893742
申请日：2018-02-12
发明人： Tokutaka Hara , Toshio Kataoka
CPC分类号： G02B6/262 , G02B6/2773
摘要： An optical element module includes an optical modulation element having first and second optical modulator units, a polarization combining means for combining two modulated lights which are emitted from the first and second optical modulator units, by making planes of polarization orthogonally cross each other; a housing which houses the optical modulation element and the polarization combining means; and a lens holder which holds a collimating lens which is disposed between the polarization combining means and an optical fiber, with the lens holder further holding the optical fiber. The optical element module is configured by joining the housing and the lens holder together by welding. In the lens holder, an outer diameter of a welding place is smaller than an outer diameter of a part which holds the collimating lens.
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公开(公告)号：US09864216B2
公开(公告)日：2018-01-09
申请号：US15604951
申请日：2017-05-25
发明人： Norikazu Miyazaki , Tokutaka Hara
CPC分类号： G02F1/035 , G02F1/225 , G02F2001/212 , G02F2201/58
摘要： An optical modulator includes a substrate having an electro-optic effect, an optical waveguide formed on the substrate, a modulation part which modulates light waves propagating through the optical waveguide, and a light receiving element which detects the light waves propagating through the optical waveguide. As the modulation part, a first modulation part and a second modulation part, which respectively modulate light waves into which input light branches, are provided. As the light receiving element, a light receiving element for the first modulation part and a light receiving element for the second modulation part are provided. The light receiving elements are disposed such that their positions in a light propagation direction are shifted from each other by an amount corresponding to one light receiving element, or more.
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公开(公告)号：US09703169B2
公开(公告)日：2017-07-11
申请号：US14764678
申请日：2014-01-22
发明人： Miki Okamura , Tokutaka Hara
CPC分类号： G02F1/225 , G02B6/126 , G02B2006/12164 , G02F1/035 , G02F1/2255 , G02F2001/212 , G02F2201/18 , H04B10/556 , H04J14/06
摘要： An aspect of the present invention is an optical modulator, comprising a waveguide substrate and a multiplexing optical system. The waveguide substrate includes a first modulation portion, a second modulation, a first optical path and a second optical path. The multiplexing optical system includes a first surface and a second surface. First output light output from the first optical path and second output light output from the second optical path are input from the first surface and are output after there are combined at a combining point of the second surface. An optical path length between the first surface and the combining point in the first output light is larger than that of in the second output light. An optical path length between the first modulation portion and the first surface and an optical path length between the second modulation portion and the first surface are different.
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公开(公告)号：US09570879B2
公开(公告)日：2017-02-14
申请号：US14384550
申请日：2013-03-14
发明人： Tokutaka Hara , Youichi Hosokawa
IPC分类号： H01S3/10 , H01S3/13 , G01B9/02 , G02F1/01 , H01S3/11 , G01J3/10 , G01N21/3581 , H01S3/00 , G01J3/26 , G01J3/02 , G01J9/02 , G01J3/45 , G01J11/00 , G01J3/28 , G01J3/453 , G02F1/21 , G02F1/225 , H01S3/067 , H01S5/12
CPC分类号： H01S3/11 , G01J3/0205 , G01J3/0291 , G01J3/10 , G01J3/26 , G01J3/2823 , G01J3/45 , G01J3/453 , G01J9/02 , G01J11/00 , G01J2009/0288 , G01N21/3581 , G02F1/01 , G02F1/21 , G02F1/2252 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/16 , G02F2203/13 , G02F2203/50 , G02F2203/56 , H01S3/0057 , H01S3/0085 , H01S3/06754 , H01S3/1301 , H01S5/12 , H01S2301/08
摘要： Provided is an optical pulse-generator and an optical pulse-generating method which are capable of generating an optical pulse train with an arbitrary pattern. An optical pulse-generator 1 includes a first optical modulator 21 configured to modulate input light using a first modulation signal SIG1 to generate optical pulses, a second optical modulator 41 configured to perform a modulation operation using a second modulation signal SIG2 synchronizing with the first modulation signal SIG1 and having a signal pattern that is set to output only specific part of the optical pulses, and a dispersion compensator 30 configured to compensate a chirp of the optical pulse output from the first optical modulator 21.
摘要翻译： 提供了能够产生任意图案的光脉冲串的光脉冲发生器和光脉冲产生方法。 光脉冲发生器1包括第一光调制器21，其被配置为使用第一调制信号SIG1调制输入光以产生光脉冲;第二光调制器41，被配置为使用与第一调制同步的第二调制信号SIG2执行调制操作 信号SIG1，具有被设定为仅输出光脉冲的特定部分的信号图案;以及色散补偿器30，被配置为补偿从第一光调制器21输出的光脉冲的啁啾。
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公开(公告)号：US10126505B2
公开(公告)日：2018-11-13
申请号：US15893742
申请日：2018-02-12
发明人： Tokutaka Hara , Toshio Kataoka
摘要： An optical element module includes an optical modulation element having first and second optical modulator units, a polarization combining means for combining two modulated lights which are emitted from the first and second optical modulator units, by making planes of polarization orthogonally cross each other; a housing which houses the optical modulation element and the polarization combining means; and a lens holder which holds a collimating lens which is disposed between the polarization combining means and an optical fiber, with the lens holder further holding the optical fiber. The optical element module is configured by joining the housing and the lens holder together by welding. In the lens holder, an outer diameter of a welding place is smaller than an outer diameter of a part which holds the collimating lens.
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公开(公告)号：US09366937B2
公开(公告)日：2016-06-14
申请号：US14371271
申请日：2013-01-11
发明人： Masaaki Sudo , Tokutaka Hara
CPC分类号： G02F1/225 , G02B6/02085 , G02B6/2932 , G02F2001/212 , G02F2203/25 , G02F2203/56 , H04B10/506 , H04B10/508
摘要： Provided is an optical pulse-generator capable of efficiently using by a low driving voltage an entire band of an optical frequency comb input to a chirp compensator for the formation of an optical pulse. According to a graph shown in FIG. 4, dispersion compensation amounts (dispersion characteristics) necessary for a chirp (dispersion) compensator to efficiently compress an optical frequency comb which sinusoidally changes become an inverse of a parabolic coefficient. It is found that the dispersion compensation amount required at the center frequency is 2/π of that of a chirp being approximate to a linear chirp, and the required dispersion compensation amount increases as the frequency shift increases.
摘要翻译： 提供一种光脉冲发生器，其能够通过低驱动电压有效地使用输入到啁啾补偿器的光频梳的整个频带来形成光脉冲。 根据图1所示的曲线图。 如图4所示，啁啾（色散）补偿器有效地压缩正弦变化的光频梳所需的色散补偿量（色散特性）成为抛物线系数的倒数。 发现中心频率所需的色散补偿量为2 / pgr; 啁啾的频率近似于线性啁啾，并且所需的色散补偿量随着频移增加而增加。
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