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1. 发明授权

US5966224A Secure communications with low-orbit spacecraft using quantum cryptography 失效
标题翻译：使用量子加密技术与低轨道航天器的安全通信
公开(公告)号：US5966224A
公开(公告)日：1999-10-12
申请号：US859187
申请日：1997-05-20
申请人： Richard J. Hughes , William T. Buttler , Paul G. Kwiat , Gabriel G. Luther , George L Morgan , Jane E. Nordholt , Charles G. Peterson , Charles M. Simmons
发明人： Richard J. Hughes , William T. Buttler , Paul G. Kwiat , Gabriel G. Luther , George L Morgan , Jane E. Nordholt , Charles G. Peterson , Charles M. Simmons
IPC分类号： H04L9/08 , H04B10/22 , H04L9/00
CPC分类号： H04L9/0858
摘要： Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and polarized. A Pockels cell changes the polarization of the polarized delayed attenuated pulses according to a string of random numbers, a first polarization representing a "1," and a second polarization representing a "0." At the receiving station, a beamsplitter randomly directs the preceding bright pulses and the polarized delayed attenuated pulses onto longer and shorter paths, both terminating in a beamsplitter which directs the preceding bright pulses and a first portion of the polarized delayed attenuated pulses to a first detector, and a second portion of the polarized delayed attenuated pulses to a second detector to generate a key for secure communication between the earth station and the spacecraft.
摘要翻译：地球站与航天器之间安全通信的装置和方法。 A激光器输出分为先前的亮脉冲和延迟的衰减脉冲和偏振的单个脉冲。普克尔斯单元根据一串随机数改变极化延迟的衰减脉冲的极化，第一极化代表“1”，第二极化代表“0”。在接收站，分束器将先前的亮脉冲和极化延迟的衰减脉冲随机地引导到更长和更短的路径上，两者都终止于将先前的亮脉冲和偏振的延迟的衰减脉冲的第一部分引导到第一检测器的分束器以及第二部分极化的延迟衰减脉冲到第二检测器以产生用于地球站和航天器之间的安全通信的键。

2. 发明授权

US06748083B2 Method and apparatus for free-space quantum key distribution in daylight 失效
标题翻译：日光自由空间量子键分布的方法和装置
公开(公告)号：US06748083B2
公开(公告)日：2004-06-08
申请号：US09844176
申请日：2001-04-27
申请人： Richard J. Hughes , William T. Buttler , Steve K. Lamoreaux , George L. Morgan , Jane E. Nordholt , C. Glen Peterson , Paul G. Kwiat
发明人： Richard J. Hughes , William T. Buttler , Steve K. Lamoreaux , George L. Morgan , Jane E. Nordholt , C. Glen Peterson , Paul G. Kwiat
IPC分类号： H04K108
CPC分类号： H04B10/70 , H04L9/0858
摘要： A quantum cryptography apparatus securely generates a key to be used for secure transmission between a sender and a receiver connected by an atmospheric transmission link. A first laser outputs a timing bright light pulse; other lasers output polarized optical data pulses after having been enabled by a random bit generator. Output optics transmit output light from the lasers that is received by receiving optics. A first beam splitter receives light from the receiving optics, where a received timing bright light pulse is directed to a delay circuit for establishing a timing window for receiving light from the lasers and where an optical data pulse from one of the lasers has a probability of being either transmitted by the beam splitter or reflected by the beam splitter. A first polarizer receives transmitted optical data pulses to output one data bit value and a second polarizer receives reflected optical data pulses to output a second data bit value. A computer receives pulses representing receipt of a timing bright timing pulse and the first and second data bit values, where receipt of the first and second data bit values is indexed by the bright timing pulse.
摘要翻译：量子加密装置安全地生成用于由大气传输链路连接的发送器和接收器之间的安全传输的密钥。第一激光器输出定时亮光脉冲; 其他激光器在由随机位产生器使能之后输出偏振光数据脉冲。输出光学器件从由接收光学器件接收的激光器传输输出光。第一分束器接收来自接收光学器件的光，其中接收到的定时亮光脉冲被引导到延迟电路，用于建立用于接收来自激光器的光的定时窗口，并且其中来自激光器之一的光学数据脉冲具有被分束器传输或被分束器反射。第一偏振器接收传送的光数据脉冲以输出一个数据位值，而第二偏光器接收反射光数据脉冲以输出第二数据位值。计算机接收表示接收到定时明亮定时脉冲的脉冲以及第一和第二数据位值，其中第一和第二数据位值的接收被亮定时脉冲索引。

3. 发明授权

US06424665B1 Ultra-bright source of polarization-entangled photons 失效
标题翻译：极光纠缠光子的超光源
公开(公告)号：US06424665B1
公开(公告)日：2002-07-23
申请号：US09550179
申请日：2000-04-14
申请人： Paul G. Kwiat , Phillippe H. Eberhard , Andrew G. White
发明人： Paul G. Kwiat , Phillippe H. Eberhard , Andrew G. White
IPC分类号： H01S310
CPC分类号： H01S3/1083
摘要： Utilizing the process of spontaneous parametric down-conversion in a novel crystal geometry, a source of polarization-entangled photon pairs has been provided that is more than ten times brighter, per unit of pump power, than previous sources, with another factor of 30 to 75 expected to be readily achievable. A high level of entanglement between photons emitted over a relatively large collection angle, and over a 10-nm bandwidth, is a characteristic of the invention. As a demonstration of the source capabilities, a 242-&sgr; violation of Bell's inequalities was attained in fewer than three minutes, and near-perfect photon correlations were achieved when the collection efficiency was reduced. In addition, both the degree of entanglement, and the purity of the state are readily tunable. The polarization entangled photon source can be utilized as a light source for the practice of quantum cryptography.
摘要翻译：利用在新颖的晶体几何学中自发参数下变换的过程，已经提供了偏振纠缠的光子对的源，每单位泵浦功率比以前的源多十倍，另外一个因子为30到 75希望能够容易地实现。在相对较大的收集角以及超过10nm的带宽上发射的光子之间的高度纠缠是本发明的特征。作为来源能力的一个示范，在不到三分钟的时间内就达到了242西格玛对贝尔的不平等程度的违反，当收集效率降低时，实现了近乎完美的光子相关。此外，缠结度和状态的纯度均易于调节。极化纠缠光子源可以用作量子密码学实践的光源。

4. 发明授权

US07725037B2 Optical switch based on parametric interaction 有权
标题翻译：基于参数交互的光开关
公开(公告)号：US07725037B2
公开(公告)日：2010-05-25
申请号：US11598510
申请日：2006-11-13
申请人： Aaron Pace VanDevender , Paul G. Kwiat
发明人： Aaron Pace VanDevender , Paul G. Kwiat
IPC分类号： H04B10/12 , H04B10/00
CPC分类号： G02F1/3515 , G02F2203/05
摘要： A method and apparatus for switching at least one wavelength component of an optical signal beam from a first state to a second state. The phase characterizing the optical signal component is incremented by interaction with one or more escort beams in a non-linear medium thereby switching the state of the optical signal component on the basis of its incremented phase. Multiple escort beams may also be employed to switch different wavelength components of the signal. The method may be employed to achieve high speed, and substantially transparent, switching of phase, intensity or polarization of a signal.
摘要翻译：一种用于将光信号束的至少一个波长分量从第一状态切换到第二状态的方法和装置。通过与非线性介质中的一个或多个护送光束的相互作用来增加表征光信号分量的相位，从而基于其递增相位切换光信号分量的状态。也可以使用多个护送束来切换信号的不同波长分量。该方法可以用于实现信号的相位，强度或极化的高速度和基本透明的切换。

5. 发明申请

US20080085123A1 Optical switch based on parametric interaction 有权
标题翻译：基于参数交互的光开关
公开(公告)号：US20080085123A1
公开(公告)日：2008-04-10
申请号：US11598510
申请日：2006-11-13
申请人： Aaron Pace VanDevender , Paul G. Kwiat
发明人： Aaron Pace VanDevender , Paul G. Kwiat
IPC分类号： H04B10/02
CPC分类号： G02F1/3515 , G02F2203/05
摘要： A method and apparatus for switching at least one wavelength component of an optical signal beam from a first state to a second state. The phase characterizing the optical signal component is incremented by interaction with one or more escort beams in a non-linear medium thereby switching the state of the optical signal component on the basis of its incremented phase. Multiple escort beams may also be employed to switch different wavelength components of the signal. The method may be employed to achieve high speed, and substantially transparent, switching of phase, intensity or polarization of a signal.
摘要翻译：一种用于将光信号束的至少一个波长分量从第一状态切换到第二状态的方法和装置。通过与非线性介质中的一个或多个护送光束的相互作用来增加表征光信号分量的相位，从而基于其递增相位切换光信号分量的状态。也可以使用多个护送束来切换信号的不同波长分量。该方法可以用于实现信号的相位，强度或极化的高速度和基本透明的切换。

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