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1. 发明授权

EP2312351B1 Optical waveguide 有权
公开(公告)号：EP2312351B1
公开(公告)日：2018-12-05
申请号：EP10177346.3
申请日：2004-07-16
申请人： Nippon Telegraph And Telephone Corporation
发明人： Imai, Tadayuki , Fujiura, Kazuo , Shimokozono, Makoto , Toyoda, Seiji , Sasaura, Masahiro , Matsuura, Tohru
IPC分类号： G02B6/12 , G02F1/035 , C30B29/30
CPC分类号： C30B29/30 , G02B2006/121 , G02F1/035 , Y10S117/918
摘要： The invention provides an optical waveguide material whose refractive index can be tailored without changing the ratio of Ta and Nb. An optical waveguide of this invention comprising an under-clad layer 1 and a core 2 that is formed on the under-clad layer 1 and has a higher refractive index than that of the under-clad layer 1 is shown. For example, KTN (KTa 1-x Nb x O 3 ) is used as the core 2, and a material that is obtained by substituting at least one element selected from the group consisting of Zr, Hf, and Sn for a portion of one element of the constituent elements of KTN and has the same perovskite type crystal structure as KTN is used as the clad. The refractive index of KTN can be reduced considerably, and this controllability widens the degree of freedom in the design of optical waveguide devices.

2. 发明公开

EP1921458A2 Electric field sensor and adjustment method thereof 审中-公开
标题翻译： Elektrofeldsensor und Einstellverfahrendafür
公开(公告)号：EP1921458A2
公开(公告)日：2008-05-14
申请号：EP08003680.9
申请日：2004-07-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Sasaki, Aiichirou , Shinagawa, Mitsuru , Shibata, Nobutarou , Minotani, Tadashi , Fujiura, Kazuo , Sasaura, Masahiro , Toyoda, Seiji
IPC分类号： G01R29/12
CPC分类号： G01R15/241 , G01R29/12
摘要： The present invention relates to an electric field sensor including: a light source (1); an electro optic crystal (7) which is applied with an electric field based on a signal under test, in which a birefringent index changes according to the electric field, and which changes a polarization state of light incident from the light source according to the birefringent index and emits the light; and a detector (9, 17, 19, 21) that detects an electric signal according to the change of the polarization state of the light emitted from the electro optic crystal (7). Further, the electric field sensor includes: a signal electrode (11) for applying the electric field based on the signal under test to the electro optic crystal (7); a counter electrode (12) that forms a pair with the signal electrode (11); and an auxiliary electrode that is electrically connected to the counter electrode (12), and that forms a capacitance with ground.
摘要翻译：电场传感器技术领域本发明涉及一种电场传感器，包括：光源（1）; 基于被测信号施加电场的电光晶体（7），其中双折射率根据电场而变化，并且根据双折射改变从光源入射的光的偏振状态指数并发光; 以及根据从电光晶体（7）发射的光的偏振状态的变化来检测电信号的检测器（9,17,19,21）。此外，电场传感器包括：信号电极（11），用于将基于被测信号的电场施加到电光晶体（7）; 与信号电极（11）形成一对的对电极（12）; 和与电极（12）电连接的辅助电极，并形成与地电容。

3. 发明公开

EP2667249A1 Optical modulator 有权
标题翻译： Optischer调制器
公开(公告)号：EP2667249A1
公开(公告)日：2013-11-27
申请号：EP13180668.9
申请日：2004-03-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toyoda, Seiji , Fujiura, Kazuo , Sasaura, Masahiro , Enbutsu, Koji , Shimokozono, Makoto , Imai, Tadayuki , Tate, Akiyuki , Matsuura, Touru , Kurihara, Takashi , Fushimi, Hiroshi
IPC分类号： G02F1/313 , G02F1/035
CPC分类号： G02F1/3551 , G02B6/12011 , G02B6/12023 , G02B2006/12142 , G02B2006/12145 , G02F1/225 , G02F1/3136 , G02F1/3137 , G02F1/365 , G02F2001/212 , G02F2201/124 , G02F2203/50
摘要： A Mach-Zehnder type optical modulator comprises at least one input waveguide, one output waveguide, a 3-dB coupler connected to said input waveguide, a 3-dB coupler connected to said output waveguide, and two three-dimensional optical waveguides connecting said two 3-dB couplers together, wherein a material for said waveguides is a crystal material including KTa 1-x Nb x O 3 (0 1-y Li y Ta 1-x Nb x O 3 (0
摘要翻译：马赫 - 曾德尔型光调制器包括至少一个输入波导，一个输出波导，连接到所述输入波导的3-dB耦合器，连接到所述输出波导的3-dB耦合器，以及连接所述两个波导的两个三维光波导 3dB耦合器在一起，其中用于所述波导的材料是包括KTa 1-x Nb x O 3（0

4. 发明公开

EP2312351A1 Optical waveguide material and optical waveguide 有权
标题翻译： Optisches Wellenleitermaterial und optischer Wellenleiter
公开(公告)号：EP2312351A1
公开(公告)日：2011-04-20
申请号：EP10177346.3
申请日：2004-07-16
申请人： Nippon Telegraph And Telephone Corporation
发明人： Imai, Tadayuki , Fujiura, Kazuo , Shimokozono, Makoto , Toyoda, Seiji , Sasaura, Masahiro , Matsuura, Tohru
IPC分类号： G02B6/12 , G02F1/035 , C30B29/30
CPC分类号： C30B29/30 , G02B2006/121 , G02F1/035 , Y10S117/918
摘要： The invention provides an optical waveguide material whose refractive index can be tailored without changing the ratio of Ta and Nb. An optical waveguide of this invention comprising an under-clad layer 1 and a core 2 that is formed on the under-clad layer 1 and has a higher refractive index than that of the under-clad layer 1 is shown. For example, KTN (KTa 1-x Nb x O 3 ) is used as the core 2, and a material that is obtained by substituting at least one element selected from the group consisting of Zr, Hf, and Sn for a portion of one element of the constituent elements of KTN and has the same perovskite type crystal structure as KTN is used as the clad. The refractive index of KTN can be reduced considerably, and this controllability widens the degree of freedom in the design of optical waveguide devices.
摘要翻译：本发明提供了一种光波导材料，其折射率可以在不改变Ta和Nb的比例的情况下进行调整。示出了本发明的光波导，其包括形成在下包层1上并且具有比下敷层1的折射率更高的折射率的下包层1和芯2。例如，使用KTN（KTa 1-x Nb x O 3）作为芯2，并且通过将选自Zr，Hf和Sn中的至少一种元素代替一部分而获得的材料 KTN的构成元素的元素，并且具有与KTN相同的钙钛矿型晶体结构作为包层。 KTN的折射率可以大大降低，这种可控性扩大了光波导器件的设计自由度。

5. 发明公开

EP1248143A3 Wavelength converter 审中-公开
标题翻译：波长转换器
公开(公告)号：EP1248143A3
公开(公告)日：2004-10-20
申请号：EP02007153.6
申请日：2002-03-28
申请人： Nippon Telegraph and Telephone Corporation
发明人： Fujiura, Kazuo , Yagi, Shogo , Imai, Tadayuki , Enbutsu, Kouji , Sasaura, Masahiro , Kurihara, Takashi , Abe, Makoto , Toyoda, Seiji , Kubota, Eishi
IPC分类号： G02F1/39 , G02F1/335 , G02F1/365 , G02F1/35 , G02F1/355
CPC分类号： G02F1/3534 , G02F1/3551 , G02F2001/3548
摘要： A wavelength converter implements high speed, high efficiency, low noise wavelength conversion without performing high voltage poling of a crystal, and enables switching and modulation of converted light in response to an electric field. A KLTN crystal (4), which is a 0.5 mm thick plate with its surfaces optically polished, includes a deposited-gold electrode within its incidence plane, and is connected to a DC power supply via a copper wire. The crystal material is composed of KTa 1-x Nb x O 3 and/or K 1-y Li y Ta 1-x Nb x O 3 . A fundamental wave generator (1) generates a 1.55 µm fundamental wave in accordance with a differential frequency between an Nd:YAG Q-switched laser and an excimer laser. A polarizer (2) controls the polarization of the fundamental wave in the direction parallel to the electric field, and launches it into the electrode of the KLTN crystal (4). The KLTN crystal (4), rotating on an axis in the direction of the electric field, launches only part of the generated SHG light with the same polarization direction as that of the incident light into a photo multiplier tube (8) through a polarizer (7).

6. 发明公开

EP1248143A2 Wavelength converter 审中-公开
标题翻译： Wellenlängenkonverter
公开(公告)号：EP1248143A2
公开(公告)日：2002-10-09
申请号：EP02007153.6
申请日：2002-03-28
申请人： Nippon Telegraph and Telephone Corporation
发明人： Fujiura, Kazuo , Yagi, Shogo , Imai, Tadayuki , Enbutsu, Kouji , Sasaura, Masahiro , Kurihara, Takashi , Abe, Makoto , Toyoda, Seiji , Kubota, Eishi
IPC分类号： G02F1/39 , G02F1/335 , G02F1/365
CPC分类号： G02F1/3534 , G02F1/3551 , G02F2001/3548
摘要： A wavelength converter implements high speed, high efficiency, low noise wavelength conversion without performing high voltage poling of a crystal, and enables switching and modulation of converted light in response to an electric field. A KLTN crystal (4), which is a 0.5 mm thick plate with its surfaces optically polished, includes a deposited-gold electrode within its incidence plane, and is connected to a DC power supply via a copper wire. The crystal material is composed of KTa 1-x Nb x O 3 and/or K 1-y Li y Ta 1-x Nb x O 3 . A fundamental wave generator (1) generates a 1.55 µm fundamental wave in accordance with a differential frequency between an Nd:YAG Q-switched laser and an excimer laser. A polarizer (2) controls the polarization of the fundamental wave in the direction parallel to the electric field, and launches it into the electrode of the KLTN crystal (4). The KLTN crystal (4), rotating on an axis in the direction of the electric field, launches only part of the generated SHG light with the same polarization direction as that of the incident light into a photo multiplier tube (8) through a polarizer (7).
摘要翻译：波长转换器实现高速，高效率，低噪声波长转换而不执行晶体的高电压极化，并且能够响应于电场而转换和调制转换的光。作为其表面光学研磨的0.5mm厚板的KLTN晶体（4）在其入射平面内包括沉积的金电极，并通过铜线连接到直流电源。晶体材料由KTa1-xNbxO3和/或K1-yLiyTa1-xNbxO3组成。基波发生器（1）根据Nd：YAG Q开关激光器和准分子激光器之间的差分频率产生1.55μm的基波。偏振器（2）在平行于电场的方向上控制基波的偏振，并将其发射到KLTN晶体（4）的电极中。沿着电场方向在轴上旋转的KLTN晶体（4）仅将与入射光相同的偏振方向的所生成的SHG光的一部分通过偏振器（8）发射到光电倍增管（8） 7）。

7. 发明授权

EP2667249B1 Optical modulator 有权
公开(公告)号：EP2667249B1
公开(公告)日：2018-11-21
申请号：EP13180668.9
申请日：2004-03-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toyoda, Seiji , Fujiura, Kazuo , Sasaura, Masahiro , Enbutsu, Koji , Shimokozono, Makoto , Imai, Tadayuki , Tate, Akiyuki , Matsuura, Touru , Kurihara, Takashi , Fushimi, Hiroshi
IPC分类号： G02F1/313 , G02F1/035
CPC分类号： G02F1/3551 , G02B6/12011 , G02B6/12023 , G02B2006/12142 , G02B2006/12145 , G02F1/225 , G02F1/3136 , G02F1/3137 , G02F1/365 , G02F2001/212 , G02F2201/124 , G02F2203/50
摘要： A Mach-Zehnder type optical modulator comprises at least one input waveguide, one output waveguide, a 3-dB coupler connected to said input waveguide, a 3-dB coupler connected to said output waveguide, and two three-dimensional optical waveguides connecting said two 3-dB couplers together, wherein a material for said waveguides is a crystal material including KTa 1-x Nb x O 3 (0

8. 发明授权

EP1605303B1 OPTICAL SWITCH 有权
公开(公告)号：EP1605303B1
公开(公告)日：2018-01-03
申请号：EP04721661.9
申请日：2004-03-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toyoda, Seiji , Fujiura, Kazuo , Sasaura, Masahiro , Enbutsu, Koji , Shimokozono, Makoto , Imai, Tadayuki , Tate, Akiyuki , Matsuura, Touru , Kurihara, Takashi , FUSHIMI, Hiroshi
IPC分类号： G02F1/313 , G02F1/035
CPC分类号： G02F1/3551 , G02B6/12011 , G02B6/12023 , G02B2006/12142 , G02B2006/12145 , G02F1/225 , G02F1/3136 , G02F1/3137 , G02F1/365 , G02F2001/212 , G02F2201/124 , G02F2203/50
摘要： A Mach-Zehnder type optical modulator comprises at least one input waveguide, one output waveguide, a 3-dB coupler connected to said input waveguide, a 3-dB coupler connected to said output waveguide, and two three-dimensional optical waveguides connecting said two 3-dB couplers together, wherein a material for said waveguides is a crystal material including KTa 1-x Nb x O 3 (0

9. 发明公开

EP1921458A3 Electric field sensor and adjustment method thereof 审中-公开
标题翻译：电场传感器和设定它
公开(公告)号：EP1921458A3
公开(公告)日：2010-09-01
申请号：EP08003680.9
申请日：2004-07-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Sasaki, Aiichirou , Shinagawa, Mitsuru , Shibata, Nobutarou , Minotani, Tadashi , Fujiura, Kazuo , Sasaura, Masahiro , Toyoda, Seiji
IPC分类号： G01R29/12
CPC分类号： G01R15/241 , G01R29/12
摘要： The present invention relates to an electric field sensor including: a light source (1); an electro optic crystal (7) which is applied with an electric field based on a signal under test, in which a birefringent index changes according to the electric field, and which changes a polarization state of light incident from the light source according to the birefringent index and emits the light; and a detector (9, 17, 19, 21) that detects an electric signal according to the change of the polarization state of the light emitted from the electro optic crystal (7). Further, the electric field sensor includes: a signal electrode (11) for applying the electric field based on the signal under test to the electro optic crystal (7); a counter electrode (12) that forms a pair with the signal electrode (11); and an auxiliary electrode that is electrically connected to the counter electrode (12), and that forms a capacitance with ground.

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