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1. 发明授权

US06747787B2 Optically functional device, single crystal substrate for the device and method for its use 有权
标题翻译：光功能器件，单晶衬底的器件及其使用方法
公开(公告)号：US06747787B2
公开(公告)日：2004-06-08
申请号：US09797596
申请日：2001-03-05
申请人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
发明人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
IPC分类号： G02F1355
CPC分类号： G02F1/0027 , G02F1/292 , G02F1/3534 , G02F1/3558 , G02F1/3775 , G02F1/39 , G02F2202/20
摘要： An optically functional device comprising a ferroelectric single crystal substrate and polarization-inverted structures formed at portions of the substrate at a temperature of not higher than the Curie temperature by an electron beam scanning irradiation method or a voltage application method and designed to control light passed through the polarization-inverted portions, wherein a LiNbO3 crystal having a molar ratio of Li/Nb within a range of from 0.95 to 1.01, is used as the substrate, so that the propagation loss of light passed through the polarization-inverted portions immediately after formation of the polarization-inverted structures, is not more than 2%.
摘要翻译：一种光功能元件，其特征在于，具有强电介质单晶基板和通过电子束扫描照射法或电压施加方法在不高于居里温度的温度下在基板的部分形成的偏振反转结构，并设计成控制通过的光使用其中Li / Nb的摩尔比在0.95〜1.01的范围内的LiNbO 3晶体作为基板，使得在形成之后立即通过偏振反转部分的光的传播损耗为偏振反转部分的极化反转结构不大于2％。

2. 发明授权

US06628453B2 Quantum switch 失效
公开(公告)号：US06628453B2
公开(公告)日：2003-09-30
申请号：US09846794
申请日：2001-05-01
申请人： Byoung-Seung Ham
发明人： Byoung-Seung Ham
IPC分类号： G02F1355
CPC分类号： G02F1/3536 , G02F1/3515
摘要： A system, method, and apparatus for optical switches based on dark resonance in which three-color lasers interact with a four-level nonlinear optical medium composing three ground states and an excited state through nondegenerate four-wave mixing processes. The switching mechanism is based on dark resonance induced two-photon coherence swapping among the three closely spaced ground states through optical transitions via an excited state. The two-photon coherence induced on the ground states is optically detected via nondegenerate four-wave mixing processes. The nondegenerate four-wave mixing generation is enhanced owing to dark resonance or electromagnetically induced transparency. The switching time and bandwidth of the present optical switching method is not limited by population relaxation time or carrier's lifetime. More advantage is given by signal amplifications owing to the dark-resonance enhanced nondegenerate four-wave mixing processes.

3. 发明授权

US06631024B2 Method for the fabrication of patterned poled dielectric structures and devices 有权
公开(公告)号：US06631024B2
公开(公告)日：2003-10-07
申请号：US09796832
申请日：2001-03-01
申请人： Carl Paquet , Jocelyn Lauzon , Sylvain Derome , Chiara Meneghini
发明人： Carl Paquet , Jocelyn Lauzon , Sylvain Derome , Chiara Meneghini
IPC分类号： G02F1355
CPC分类号： G02F1/3558
摘要： The present invention concerns a method for fabricating a patterned, poled dielectric structure, comprising the steps of providing a material, patterning a periodic pattern into a first surface, applying an electrode to the first surface, and applying a voltage to the electrode to create a domain inversion in the material. Preferably, the material is a ferroelectric material, and the electrode is a single, planar, solid electrode. The method proposed herein is simple, reproducible and economical, as compared to prior methods. Patterned, poled dielectric structures are used to generate optical frequency conversion, by creating quasi-phase matching between two optical signals.

4. 发明授权

US06762874B2 Polarization inversion method of ferroelectrics and fabrication method of optical wavelength conversion device 失效
标题翻译：铁电极化反演方法及光波长转换装置的制作方法
公开(公告)号：US06762874B2
公开(公告)日：2004-07-13
申请号：US09987131
申请日：2001-11-13
申请人： Yasukazu Nihei
发明人： Yasukazu Nihei
IPC分类号： G02F1355
CPC分类号： G02F1/3558 , G02F1/3775 , G02F2201/122
摘要： A method for forming a polarization inversion portion, in which electrodes with a predetermined pattern are formed on one surface of a ferroelectric crystal that has been subjected to a single polarization, and a local polarization inversion portion corresponding to the pattern of the electrodes is formed in the ferroelectric crystal by applying electric field to both front and back surfaces of the ferroelectric crystal via the electrodes, makes it possible to accurately form a polarization inversion pattern. In this method, portions of the ferroelectric crystal corresponding to the respective electrodes and portions between these portions are subjected to a polarization inversion, and one polarization inversion portion is formed.
摘要翻译：一种形成极化反转部分的方法，其中具有预定图案的电极形成在已经经受单极化的铁电晶体的一个表面上，并且形成与电极图案对应的局部极化反转部分通过经由电极向强电介质晶体的前表面和后表面施加电场的铁电晶体使得可以精确地形成极化反转图案。在该方法中，对应于各个电极的铁电晶体的部分和这些部分之间的部分进行极化反转，并且形成一个极化反转部分。

5. 发明授权

US06624923B2 Optically functional device, single crystal substrate for the device and method for its use 有权
公开(公告)号：US06624923B2
公开(公告)日：2003-09-23
申请号：US09796594
申请日：2001-03-02
申请人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
发明人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
IPC分类号： G02F1355
CPC分类号： G02F1/3558 , G02F1/3775 , G02F2202/20
摘要： An optically functional device comprising a ferroelectric single crystal substrate and polarization-inverted structures formed at portions of the substrate at a temperature of not higher than the Curie temperature by an electron beam scanning irradiation method or a voltage application method and designed to control light passed through the polarization-inverted portions, wherein a LiTaO3 crystal having a molar ratio of Li/Ta within a range of from 0.95 to 1.02, is used as the substrate, so that the propagation loss of light passed through the polarization-inverted portions immediately after formation of the polarization-inverted structures, is not more than 2%.

6. 发明授权

US06542285B1 Backswitch poling method for domain patterning of ferroelectric materials 有权
标题翻译：铁电材料领域图案化的逆开关极化方法
公开(公告)号：US06542285B1
公开(公告)日：2003-04-01
申请号：US09493647
申请日：2000-01-28
申请人： Robert G. Batchko , Gregory D. Miller , Robert L. Byer , Vladimir Shur , Martin M. Fejer
发明人： Robert G. Batchko , Gregory D. Miller , Robert L. Byer , Vladimir Shur , Martin M. Fejer
IPC分类号： G02F1355
CPC分类号： G02F1/3558
摘要： A method for fabricating periodically poled structures. The method produces an electric field within a ferroelectric substrate by applying a voltage waveform to an electrode structure disposed on a surface of the substrate. The waveform raises the electric field magnitude to a level substantially greater than that required to reverse domains within the substrate. Domain reversal continues through to completion at which time the poling field is turned off or substantially reduced to induce spontaneous backswitch poling. The forward poling field is then reapplied to stop the backswitch poling. The ability to selectively enable and terminate backswitching allows for the formation of domain patterns with small feature sizes and high uniformity through large volumes of material.
摘要翻译：周期性极化结构的制造方法。该方法通过向设置在基板表面上的电极结构施加电压波形而在铁电体基板内产生电场。该波形将电场强度提高到明显大于反向衬底内的区域所需的电平。域反转继续到完成，此时极化场被关闭或大幅度减少以引起自发的后开关极化。然后重新应用正向极化场以停止后开关极化。选择性地启用和终止反向切换的能力允许通过大量材料形成具有小特征尺寸和高均匀性的区域图案。

7. 发明授权

US06710912B1 Technique for quasi-phase matching 有权
标题翻译：准相位匹配技术
公开(公告)号：US06710912B1
公开(公告)日：2004-03-23
申请号：US10326124
申请日：2002-12-23
申请人： Robert John Filkins , Peter William Lorraine
发明人： Robert John Filkins , Peter William Lorraine
IPC分类号： G02F1355
CPC分类号： G02F1/3775 , G02F2001/3548 , G02F2202/32
摘要： A technique for achieving quasi phase matching in a photonic band gap structure comprising a first material and a second material is disclosed. In one particular exemplary embodiment, the technique may be realized by calculating a coherence length of an optical interaction of interest involving at least a first frequency and a second frequency; calculating a first lattice constant of the first material to achieve a predetermined first group velocity for a fundamental optical frequency; calculating a second lattice constant of the second material so that a second group velocity of a second optical frequency is substantially the same as the first group velocity associated with the fundamental optical frequency of the first material; determining a photonic band gap arrangement for achieving quasi phase matching in the photonic band gap structure; and implementing the first lattice constant of the first material and the second lattice constant of the second material in accordance with the photonic band gap arrangement to achieve quasi phase matching in the photonic band gap structure.
摘要翻译：公开了一种在包括第一材料和第二材料的光子带隙结构中实现准相位匹配的技术。在一个特定示例性实施例中，可以通过计算涉及至少第一频率和第二频率的感兴趣的光学相互作用的相干长度来实现该技术; 计算第一材料的第一晶格常数以实现基本光频率的预定的第一组速度; 计算第二材料的第二晶格常数，使得第二光频率的第二组速度与与第一材料的基本光频率相关联的第一组速度基本相同; 确定用于实现光子带隙结构中的准相位匹配的光子带隙布置; 并且根据光子带隙布置实现第一材料的第一晶格常数和第二材料的第二晶格常数，以实现光子带隙结构中的准相位匹配。

8. 发明授权

US06633428B2 Optical module 失效
标题翻译：光模块
公开(公告)号：US06633428B2
公开(公告)日：2003-10-14
申请号：US09859387
申请日：2001-05-18
申请人： Kenichi Abe , Yuji Hozumi
发明人： Kenichi Abe , Yuji Hozumi
IPC分类号： G02F1355
CPC分类号： G02F1/0305 , G02F2001/3505 , G02F2202/22
摘要： A pyroelectric crystal, e.g. a LN crystal (1), is coated with conductive films (8). When polarization charges (4) are generated on the surface of the LN crystal (1) due to its pyroelectric effect upon accumulation of stress, the presence of the conductive films (8) induces on themselves reverse electric charges (9) matching the polarization charges (4) generated on the surface of the LN crystal (1). Therefore an electric field created by the polarization charges (4) is canceled by an electric field created by the reverse charges (9) induced on the conductive films (8). The conductive film (8b) formed on a face through which signal light is transmitted is formed from a medium transparent with respect to the signal light. Therefore the light path of the signal light is not blocked by the conductive film (8b), and the polarization charges (4) generated on the signal transmissive face can be neutralized.
摘要翻译：热电晶体，例如将LN晶体（ 1 ）涂覆有导电膜（ 8 ）。由于其热电效应，在LN晶体表面（ 1 ）上产生极化电荷（ 4 ）应力的累积，导电膜（ 8 ）的存在本身会引起与之相匹配的反电荷（ 9 ）在LN晶体的表面（ 1 ）上产生的极化电荷（ 4 ）。因此，由反向电荷产生的电场（ 9 ）消除由极化电荷（ 4 ）产生的电场 >）导电膜（ 8 ）。形成在透射信号光的面上的导电膜（ 8 b ）由相对于信号灯。因此，信号光的光路不被导电膜（ 8 b ）阻挡，极化电荷（ 4 ）可以被中和。

9. 发明授权

US06424454B1 Brewster-cut crystal for nonlinear frequency conversion 失效
标题翻译：用于非线性频率转换的布鲁斯特切割晶体
公开(公告)号：US06424454B1
公开(公告)日：2002-07-23
申请号：US09681181
申请日：2001-02-12
申请人： Gerald T. Moore
发明人： Gerald T. Moore
IPC分类号： G02F1355
CPC分类号： G02F1/3534 , G02B1/02 , G02B5/3066 , G02F2001/3509
摘要： A specially cut uncoated birefringent crystal having three Brewster-cut faces with adjacent coated Brewster-cut coupling prisms are used for optical frequency conversion. Two input frequencies are used to obtain a third frequency by sum-frequency generation. The uncoated birefringent crystal permits high power input beams.
摘要翻译：具有三个布鲁斯特切面的特殊切割的未涂布的双折射晶体与相邻涂布的布鲁斯特切割耦合棱镜用于光学频率转换。两个输入频率用于通过和频产生获得第三个频率。未涂布的双折射晶体允许高功率输入光束。

10. 发明授权

US06353495B1 Method for forming a ferroelectric domain-inverted structure 失效
标题翻译：形成铁电畴反转结构的方法
公开(公告)号：US06353495B1
公开(公告)日：2002-03-05
申请号：US09375082
申请日：1999-08-16
申请人： Kiminori Mizuuchi , Kazuhisa Yamamoto , Tatsuo Kawaguchi , Minoru Imaeda
发明人： Kiminori Mizuuchi , Kazuhisa Yamamoto , Tatsuo Kawaguchi , Minoru Imaeda
IPC分类号： G02F1355
CPC分类号： G02F1/3558 , G02F1/37 , G02F1/3775 , G02F2001/3548
摘要： A method for forming a ferroelectric domain-inverted structure, having the steps of joining at least two kinds of ferroelectric material which have different spontaneous polarizations, and ferroelectric domain-inverting one of the ferroelectric materials and thereby ferroelectric domain-inverting the other ferroelectric material joined thereto.
摘要翻译：一种形成铁电畴反转结构的方法，具有连接具有不同自发极化的至少两种铁电材料的步骤和铁电体反转的铁电体材料之一，从而铁电畴反转另一个铁电材料到此。

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