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公开(公告)号：EP2056159A1
公开(公告)日：2009-05-06
申请号：EP08167961.5
申请日：2008-10-30
申请人： NGK Insulators, Ltd.
CPC分类号： G02F1/2255 , G02B6/4214 , G02B2006/12104 , G02B2006/12142 , G02F2203/21
摘要： An optical modulator 20 has an optical waveguide substrate 1 having a pair of principal surfaces 1a, 1c, a pair of side surfaces 1b and an incident face 1d and exit face 1e of light, the substrate being composed of a ferroelectric material; a channel optical waveguide 4 having at least a pair of branch sections 4b, a multiplexing section 6 of the branch sections and an exit section 4c provided on the downstream of the multiplexing section, the waveguide being formed on the principal surface 1a; a modulation electrode 2, 3 for applying a signal voltage for modulating light propagating in the branch sections; and a reflective groove 7 for reflecting leaked light of off-mode emitted from the multiplexing section 6 and emitting the light from the one principal surface 1a. An operating point of the optical modulator is controlled by changing a DC bias applied on the modulation electrode based on optical output of the leaked light of off-mode.
摘要翻译： 光调制器20具有：具有一对主面1a，1c，一对侧面1b以及光的入射面1d和出射面1e的光波导基板1，该基板由强电介质构成; 具有至少一对分支部4b，多个分支部的多路复用部6和设置在多路复用部的下游的出射部4c的通道光波导4，该波导形成在主面1a上; 调制电极2,3，用于施加用于调制在分支部分中传播的光的信号电压; 以及反射槽7，用于反射从复用部分6发射的关闭模式的泄漏光并发射来自该一个主表面1a的光。 基于关闭模式的泄漏光的光输出，通过改变施加在调制电极上的DC偏压来控制光调制器的操作点。
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公开(公告)号：EP1176455B1
公开(公告)日：2007-04-18
申请号：EP01306429.0
申请日：2001-07-26
申请人： NGK INSULATORS, LTD.
发明人： Kondo, Atsuo , Kondo, Jungo , Aoki, Kenji , Mitomi, Osamu
IPC分类号： G02F1/035
CPC分类号： G02F1/2255 , G02F1/0356
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公开(公告)号：EP1785756A3
公开(公告)日：2007-08-01
申请号：EP06123617.0
申请日：2006-11-07
申请人： NGK INSULATORS, LTD.
发明人： Mitomi, Osamu , Aoki, Kenji , Kondo, Jungo , Iwata, Yuichi , Ejiri, Tetsuya
CPC分类号： G02B6/125 , G02B2006/12097 , G02B2006/12104 , G02B2006/12119 , G02B2006/12142 , G02B2006/12159 , G02F1/0508 , G02F1/2255 , G02F1/3137
摘要： It is provided an optical waveguide device in which the radius of curvature of a curved part of an optical waveguide can be lowered and the radiation loss of light in the curved part can be reduced. An optical waveguide device (2) has a ferroelectric optical waveguide substrate and an optical waveguide (5) formed in or on the substrate and modulating electrodes (4A,4B and 4C). The thickness of the optical waveguide substrate is 30 µm or smaller at least in a region where the optical waveguide is formed. The optical waveguide has curved part (5c,5d) having a radius of curvature of 30 mm or smaller.
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公开(公告)号：EP1764626A3
公开(公告)日：2010-09-08
申请号：EP06120543.1
申请日：2006-09-13
申请人： NGK Insulators, Ltd.
发明人： Kondo, Jungo , Mitomi, Osamu , Aoki, Kenji , Iwata, Yuichi , Ejiri, Tetsuya
CPC分类号： G01S13/87 , G01S7/352 , G01S13/34 , G01S13/931 , G01S2013/9321 , G01S2013/9325 , G01S2013/9375 , G02F1/0516
摘要： It is provided a radio oscillating system for oscillating a radio signal. The system has an optical modulator for oscillation, a modulating means for inputting a modulating signal of a frequency of fm into the optical modulator to modulate a carrier wave so as to interpose sideband waves onto the carrier wave at positions shifted with respect to the frequency of the carrier wave by the frequency "fm"; and an optical receiver for oscillation for receiving beam from the optical modulator and converting the beam into an electrical signal. The system further has a radiating means for radiating radio signal of a frequency of 2fm based on the electrical signal. An input voltage Vp-p applied on the optical modulator is 1.0 times or more and 1.99 times or less of a half-wavelength voltage Vπ of the optical modulator.
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公开(公告)号：EP1764626A2
公开(公告)日：2007-03-21
申请号：EP06120543.1
申请日：2006-09-13
申请人： NGK INSULATORS, LTD.
发明人： Kondo, Jungo , Mitomi, Osamu , Aoki, Kenji , Iwata, Yuichi , Ejiri, Tetsuya
CPC分类号： G01S13/87 , G01S7/352 , G01S13/34 , G01S13/931 , G01S2013/9321 , G01S2013/9325 , G01S2013/9375 , G02F1/0516
摘要： It is provided a radio oscillating system for oscillating a radio signal. The system has an optical modulator for oscillation, a modulating means for inputting a modulating signal of a frequency of fm into the optical modulator to modulate a carrier wave so as to interpose sideband waves onto the carrier wave at positions shifted with respect to the frequency of the carrier wave by the frequency "fm"; and an optical receiver for oscillation for receiving beam from the optical modulator and converting the beam into an electrical signal. The system further has a radiating means for radiating radio signal of a frequency of 2fm based on the electrical signal. An input voltage Vp-p applied on the optical modulator is 1.0 times or more and 1.99 times or less of a half-wavelength voltage Vπ of the optical modulator.
摘要翻译： 提供了一种用于振荡无线电信号的无线电振荡系统。 该系统具有用于振荡的光调制器，用于将fm频率的调制信号输入到光调制器中以调制载波的调制装置，以便在相对于频率的位置偏移的位置处将边带波置于载波上 载波频率“fm”; 以及用于振荡的光接收器，用于从光调制器接收光束并将光束转换成电信号。 该系统还具有用于基于电信号辐射频率为2fm的无线电信号的辐射装置。 施加在光调制器上的输入电压Vp-p是光调制器的半波长电压V -1的1.0倍以上且1.99倍以下。
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公开(公告)号：EP1441250A2
公开(公告)日：2004-07-28
申请号：EP04250115.5
申请日：2004-01-12
申请人： NGK INSULATORS, LTD.
发明人： Aoki, Kenji , Mitomi, Osamu , Kondo, Jungo , Kondo, Atsuo
CPC分类号： G02F1/035 , G02F1/0316 , G02F1/225 , G02F2201/127
摘要： An object of the invention is to provide an electrode system for optical modulation of an optical modulator to reduce a thickness "E" of an electrode required for velocity matching and for reducing a propagation loss in the electrode. A substrate 2 is made of an electrooptic material and has one and the other main faces 2a, 2b opposing each other. An electrode system 20A is provided on the substrate 2 for applying a voltage for modulating light propagating in optical waveguides 6A and 6B. The electrode system 20A includes ground electrodes 3A, 3B and a signal electrode 4. A ratio "W/G" of a width "W" of the signal electrode 4 to a gap "G" between the ground and signal electrodes is 0.8 or higher. Preferably, the substrate 2 has a thickness "T" of 20 µm or larger, in a region where the optical waveguides 6A and 6B are provided.
摘要翻译： 本发明的目的是提供一种用于光学调制器的光学调制的电极系统，以减少速度匹配所需的电极的厚度“E”并减少电极中的传播损耗。 基板2由电光材料制成，并且具有彼此相对的一个和另一个主面2a，2b。 电极系统20A设置在基板2上，用于施加用于调制在光波导6A和6B中传播的光的电压。 电极系统20A包括接地电极3A，3B和信号电极4.信号电极4的宽度“W”与接地信号电极之间的间隙“G”的比率“W / G”为0.8以上 。 优选地，在设置有光波导6A和6B的区域中，基板2的厚度“T”为20μm以上。
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公开(公告)号：EP1193536A2
公开(公告)日：2002-04-03
申请号：EP01308018.9
申请日：2001-09-20
申请人： NGK INSULATORS, LTD.
发明人： Minakata, Makoto , Kondo, Jungo , Kondo, Atsuo , Aoki, Kenji , Mitomi, Osamu
IPC分类号： G02F1/035
CPC分类号： G02F1/0356 , G02F1/0305
摘要： A travelling wave-type optical modulator (1) has a substrate (3) made of an electro-optic material, optical waveguides (6A,6B) fabricated on the top surface of the substrate, and electrodes (2A,2B,2C) for modulating an optical wave through the optical waveguide. The substrate is partially thinned from the bottom surface of the substrate to form a first thinned portion (3f) and a second thinned portion (3e) so that the thickness of the first thinned portion is set to be larger than the thickness of the second thinned portion, and the optical waveguide is positioned in the first thinned portion.
摘要翻译： 行波型光调制器（1）具有由电光材料制成的基板（3），在基板顶面制作的光波导（6A，6B）和用于 通过光波导调制光波。 从衬底的底表面部分地薄化衬底以形成第一变薄部分（3f）和第二变薄部分（3e），使得第一变薄部分的厚度被设定为大于第二变薄部分 并且光波导位于第一变薄部分中。
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公开(公告)号：EP2073053A1
公开(公告)日：2009-06-24
申请号：EP08171962.7
申请日：2008-12-17
申请人： NGK INSULATORS, LTD.
发明人： Iwata, Yuichi , Mitomi, Osamu , Kondo, Jungo , Aoki, Kenji
CPC分类号： G02F1/0356 , G02F1/2255 , G02F2201/122
摘要： An object of the present invention is, in an optical modulator, to increase the production yield by enhancing the patterning accuracy of the electrodes, as well as to reduce the electrode loss by increasing the thickness of the electrodes. An optical modulator has a substrate 5 made of an electro-optical material; a modulation electrode 2A, 3A, 2B provided on the substrate 5; and an optical waveguide 1c provided on the substrate 5. Light propagating through the optical waveguide 1c is modulated by applying a modulation voltage to the modulation electrode. At least a part of the modulation electrode includes a base 2a, 3a formed on the substrate 5 and a projection part 2b, 3b having a width narrower than that of the base.
摘要翻译： 本发明的目的在于，在光调制器中，通过提高电极的构图精度以及通过增加电极的厚度来减小电极损耗来提高生产率。 光调制器具有由电光材料制成的基板5; 设置在基板5上的调制电极2A，3A，2B; 以及设置在基板5上的光波导1c。通过向调制电极施加调制电压来调制通过光波导1c传播的光。 调制电极的至少一部分包括形成在基板5上的基部2a，3a和宽度窄于基部的宽度的突出部2b，3b。
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公开(公告)号：EP1193536B1
公开(公告)日：2004-11-24
申请号：EP01308018.9
申请日：2001-09-20
申请人： NGK INSULATORS, LTD.
发明人： Minakata, Makoto , Kondo, Jungo , Kondo, Atsuo , Aoki, Kenji , Mitomi, Osamu
CPC分类号： G02F1/0356 , G02F1/0305
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公开(公告)号：EP1193536A3
公开(公告)日：2003-02-05
申请号：EP01308018.9
申请日：2001-09-20
申请人： NGK INSULATORS, LTD.
发明人： Minakata, Makoto , Kondo, Jungo , Kondo, Atsuo , Aoki, Kenji , Mitomi, Osamu
CPC分类号： G02F1/0356 , G02F1/0305
摘要： A travelling wave-type optical modulator (1) has a substrate (3) made of an electro-optic material, optical waveguides (6A,6B) fabricated on the top surface of the substrate, and electrodes (2A,2B,2C) for modulating an optical wave through the optical waveguide. The substrate is partially thinned from the bottom surface of the substrate to form a first thinned portion (3f) and a second thinned portion (3e) so that the thickness of the first thinned portion is set to be larger than the thickness of the second thinned portion, and the optical waveguide is positioned in the first thinned portion.
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