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1. 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).

2. 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）。

3. 发明公开

EP0331483A3 Process for the preparation of fluoride glass and process for the preparation of optical fiber preform using the fluoride glass 失效
标题翻译：氟化玻璃的制备方法和使用氟玻璃制备光纤预制件的方法
公开(公告)号：EP0331483A3
公开(公告)日：1990-08-16
申请号：EP89302073.5
申请日：1989-03-02
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Fujiura, Kazuo , Ohishi, Yasutake , Fujiki, Michiya , Kanamori, Terutoshi , Takahashi, Shiro
IPC分类号： C03C1/00 , C03C13/04 , C03C3/32 , C03B37/018
CPC分类号： C03B37/01807 , C03B19/1415 , C03B19/1476 , C03B37/01815 , C03B37/01861 , C03B2201/82 , C03B2207/30 , C03B2207/81 , C03B2207/90 , C03C1/00 , C03C3/325 , C03C13/042 , Y10S65/16
摘要： Provided is a process for preparing a homogenous fluoride glass containing high purity BaF₂ through the CVD process characterized in that the used gaseous mixture comprising: a barium β-diketonate complex serving as a first starting material and represented by the following general formula (1) of:
wherein R is an alkyl group having 1 to 7 carbon atoms, R′ is a substituted alkyl group having fluorine atoms substituting hydrogen atoms and represented by C n F 2n+1 where n is an integer of from 1 to 3; and
a gaseous or vaporizable compound of the matallic element constituting said fluoride glass, the gaseous or vaporizable compound serving as a second starting material; and a fluorine-containing gas serving as fluorinating agent. Further provided is a process for preparing a preform for a fluoride optical fiber which is low in trasmission loss, by depositing the fluoride glass over the interior wall of a cylindrical tube or the wall of rod-like glass substrate through the CVD process followed by collapsing.

4. 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.

5. 发明授权

EP2402726B1 Spectroscope 有权
标题翻译：分光镜
公开(公告)号：EP2402726B1
公开(公告)日：2016-09-07
申请号：EP11183117.8
申请日：2008-07-30
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Nakamura, Koichiro , Sasaki, Yuzo , Fujiura, Kazuo , Yagi, Shogo
IPC分类号： G01J3/06 , G01J3/02 , G01J3/14 , G01J3/18 , G01J3/36
CPC分类号： G01J3/14 , G01J3/02 , G01J3/0205 , G01J3/0237 , G01J3/06 , G01J3/18 , G01J3/36 , G01J2003/064

6. 发明授权

EP2221662B1 Electro-optical element 有权
标题翻译：一种电光装置
公开(公告)号：EP2221662B1
公开(公告)日：2015-09-02
申请号：EP10165234.5
申请日：2006-06-20
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Nakamura, Kouichirou , Fujiura, Kazuo , Imai, Tadayuki , Miyazu, Jun
IPC分类号： G02F1/29 , G02F1/03
CPC分类号： G02F1/29 , G02F1/03 , G02F1/0316 , G02F1/0322 , G02F2001/291

7. 发明公开

EP2402726A1 Spectroscope 有权
标题翻译：分光镜
公开(公告)号：EP2402726A1
公开(公告)日：2012-01-04
申请号：EP11183117.8
申请日：2008-07-30
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Nakamura, Koichiro , Sasaki, Yuzo , Fujiura, Kazuo , Yagi, Shogo
IPC分类号： G01J3/06 , G01J3/02 , G01J3/14 , G01J3/18 , G01J3/36
CPC分类号： G01J3/14 , G01J3/02 , G01J3/0205 , G01J3/0237 , G01J3/06 , G01J3/18 , G01J3/36 , G01J2003/064
摘要： The present invention provides a small spectrocsope that has a short response time. A spectroscope according to one embodiment includes a beam deflector that includes an electro-optic crystal, having an electro-optic effect, and paired electrodes used to apply an electric field inside the electro-optic crystal; spectroscopic means for dispersing light output by the beam deflector; and wavelength selection means for selecting light having an arbitrary wavelength from the light dispersed and output by the spectroscopic means, wherein the spectroscopic means is a prism including a first prism and a second prism for which refractive index dispersion is greater than that of the first prism. The spectroscope further comprises dividing means for outputting, in two different directions, light that is input, wherein the light output in the two different directions enters the first prism and the second prism.
摘要翻译：本发明提供了一种响应时间短的小型光谱团。根据一个实施例的分光镜包括：光束偏转器，其包括具有电光效应的电光晶体和用于在电光晶体内施加电场的成对电极; 分光装置，用于分散由光束偏转器输出的光; 以及波长选择装置，用于从由分光装置分光和输出的光中选择具有任意波长的光，其中分光装置是包括第一棱镜和第二棱镜的棱镜，第一棱镜和第二棱镜的折射率色散大于第一棱镜的折射率色散。该分光镜还包括用于在两个不同方向上输出所输入的光的分割装置，其中在两个不同方向上输出的光进入第一棱镜和第二棱镜。

8. 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。

9. 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

10. 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

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