公开(公告)号：US20110311050A1

公开(公告)日：2011-12-22

申请号：US13201001

申请日：2009-06-30

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04K1/00

CPC分类号： H04L9/0822 ,  H04B10/70 ,  H04L9/0858

摘要： Communications having high security against information leakage can be established in a current optical fiber network in the following manner. (1) A sender and a receiver share a seed key in advance, and then transmit and receive random numbers superimposed on carrier light accompanied with fluctuations, where transmission basis is determined by a random number. The sender and the receiver check a shared basis determined by the seed key with a random basis and employ only a random number signal superimposed on a slot for the shared basis that coincides with the random basis, and share the random numbers between the sender and the receiver. Here, since the carrier light has fluctuations, a bit error exists in the received signals. However, because of the seed key, a legitimate receiver can receive a signal with a bit error rate smaller than an eavesdropper. (2) The information amount of the random numbers shared between the sender and the receiver is reduced to secret capacity through privacy amplification, and then the reduced random numbers are set to be a secret key. (3) An actual signal is encrypted with the obtained secret key, and is transmitted and received.

摘要翻译： 可以以下列方式在目前的光纤网络中建立具有针对信息泄漏的高安全性的通信。 （1）发送方和接收方预先共享种子密钥，然后发送和接收伴随波动的载波上叠加的随机数，其中传输基准由随机数确定。 发送方和接收方以随机为基础确定种子密钥确定的共享基础，并且仅使用叠加在时隙上的随机数信号作为与随机基准一致的共享基础，并且共享发送方和发送方之间的随机数 接收器。 这里，由于载波具有波动，所以在接收信号中存在位错误。 然而，由于种子密钥，合法的接收器可以接收比误码率小于窃听者的信号。 （2）通过隐私放大将发送方和接收方之间共享的随机数的信息量减少为秘密容量，然后将减少的随机数设置为秘密密钥。 （3）用获得的密钥对实际信号进行加密，并发送和接收。

公开(公告)号：US06879766B2

公开(公告)日：2005-04-12

申请号：US10318103

申请日：2002-12-13

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： G02B6/12 ,  G02B1/11 ,  G02B1/113 ,  G02B6/122 ,  G02B6/10

CPC分类号： B82Y20/00 ,  G02B6/1225

摘要： The present invention provides a technique of reducing an incident/outgoing loss of a photonic crystal. On each of incident/outgoing sides of a photonic crystal, an antireflection layer made of a photonic crystal is disposed. At the incident side of a photonic crystal 200 having an effective refractive index n2, a photonic crystal 100 having an effective refractive index n1 satisfying the relation of n1

摘要翻译： 本发明提供减少光子晶体的入射/出射损失的技术。 在光子晶体的每个入射/出射侧，设置由光子晶体制成的抗反射层。 在具有有效折射率n2的光子晶体200的入射侧设置具有满足n1

公开(公告)号：US08934633B2

公开(公告)日：2015-01-13

申请号：US13578016

申请日：2011-01-17

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04N7/167 ,  H04L9/08

CPC分类号： H04L9/08 ,  H04L9/0858

摘要： High-security communications against information leakage as well as high-speed communications are realized using present optical fiber networks. The methods are as follows: (1) A seed key is shared between a transmitter and a receiver in advance. Random numbers are transmitted using carrier light accompanied by fluctuations and bases that are decided by random numbers. The transmitter and receiver compare a shared basis that is determined by the seed key with the random basis, and decompose the random numbers superimposed on each bit into two sequences, based on whether the shared basis coincides with the random basis or not. Error correction is processed for each sequence in the receiver, and then the random numbers are shared between the transmitter and the receiver. (2) The amount of the random numbers shared between the transmitter and the receiver is reduced to secret capacity through privacy amplification, and the resultant random numbers are used as a secret key. (3) Real data are encrypted with the obtained secret key, and they are transmitted and received.

摘要翻译： 使用现有光纤网络实现信息泄露和高速通信的高安全性通信。 方法如下：（1）提前在发射机和接收机之间共享种子密钥。 随机数使用伴随着随机数决定的波动和基数的载波发射。 发射机和接收机将由种子密钥确定的共享基础与随机基础进行比较，并且基于共享基础是否与随机基准一致，将每个比特叠加的随机数分解为两个序列。 对接收机中的每个序列处理纠错，然后在发射机和接收机之间共享随机数。 （2）通过隐私放大将发射机和接收机之间共享的随机数量减少到秘密容量，并将所得到的随机数作为秘密密钥。 （3）使用所获得的密钥对真实数据进行加密，并发送和接收。

公开(公告)号：US20120314867A1

公开(公告)日：2012-12-13

申请号：US13578016

申请日：2011-01-17

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04L9/28

CPC分类号： H04L9/08 ,  H04L9/0858

摘要： High-security communications against information leakage as well as high-speed communications are realized using present optical fiber networks. The methods are as follows: (1) A seed key is shared between a transmitter and a receiver in advance. Random numbers are transmitted using carrier light accompanied by fluctuations and bases that are decided by random numbers. The transmitter and receiver compare a shared basis that is determined by the seed key with the random basis, and decompose the random numbers superimposed on each bit into two sequences, based on whether the shared basis coincides with the random basis or not. Error correction is processed for each sequence in the receiver, and then the random numbers are shared between the transmitter and the receiver. (2) The amount of the random numbers shared between the transmitter and the receiver is reduced to secret capacity through privacy amplification, and the resultant random numbers are used as a secret key. (3) Real data are encrypted with the obtained secret key, and they are transmitted and received.

摘要翻译： 使用现有光纤网络实现信息泄露和高速通信的高安全通信。 方法如下：（1）提前在发射机和接收机之间共享种子密钥。 随机数使用伴随着随机数决定的波动和基数的载波发射。 发射机和接收机将由种子密钥确定的共享基础与随机基础进行比较，并且基于共享基础是否与随机基准一致，将每个比特叠加的随机数分解为两个序列。 对接收机中的每个序列处理纠错，然后在发射机和接收机之间共享随机数。 （2）通过隐私放大将发射机和接收机之间共享的随机数量减少到秘密容量，并将所得到的随机数作为秘密密钥。 （3）使用所获得的密钥对真实数据进行加密，并发送和接收。

公开(公告)号：US07596322B2

公开(公告)日：2009-09-29

申请号：US11350086

申请日：2006-02-09

申请人： Tatsuya Tomaru ,  Shinya Sasaki ,  Kiyotaka Hammura

发明人： Tatsuya Tomaru ,  Shinya Sasaki ,  Kiyotaka Hammura

IPC分类号： H04B10/12 ,  H04B10/06

CPC分类号： H04L9/0662 ,  H04L9/0858 ,  H04L2209/34

摘要： In a cryptographic key distribution system by the phase modulation using a single photon state or a faint LD light, there is required an interferometer independent on polarization and stabilized against thermal fluctuations in order to make a transmission distance longer. Cryptographic key distribution systems are generally low in cryptographic-key-generating efficiency, and an improvement in the efficiency is demanded. In the present invention, two interferometers are disposed within the receiver so as to require no phase modulator within the receiver, thereby achieving a polarization-independent receiver. The pulses are paired, and the signal is transmitted with the relative phase, and the interval of the paired pulses is sufficiently reduced to set the optical path within the interferometer in the receiver to be smaller, thereby achieving the interferometer stabilized against thermal fluctuations. The transmission rate is set sufficiently larger than the average detection rate, and only a part of the transmitted random numbers is detected at random. This reduces a probability that an eavesdropper and a regular recipient observe data at the same slot.

摘要翻译： 在通过使用单光子状态或微弱LD光的相位调制的加密密钥分配系统中，需要独立于极化的干涉仪，并且针对热波动进行稳定，以使传输距离更长。 加密密钥分配系统通常密码密钥生成效率较低，需要提高效率。 在本发明中，两个干涉仪设置在接收器内，以便在接收机内不需要相位调制器，从而实现偏振无关接收器。 脉冲成对，信号以相对相位传输，并且成对脉冲的间隔被充分地减小以将接收器内的干涉仪内的光路设置得较小，从而实现干涉仪稳定的抗热波动。 传输速率被设置得足够大于平均检测率，并且只有一部分发送的随机数被随机检测。 这减少了窃听者和常规接收者在同一时隙观察数据的概率。

公开(公告)号：US20090052905A1

公开(公告)日：2009-02-26

申请号：US12128863

申请日：2008-05-29

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04B10/00

CPC分类号： H04B10/5561 ,  H04B10/505 ,  H04B10/5162 ,  H04B10/677

摘要： Signals can be superimposed on optical phase even when low-coherency light is used, and a bit rate and a signal coding format similar to those used in ordinary optical communications can be used. A transmitter includes an asymmetric interferometer or an antisqueezed light generator to convert a train of single pulses into a train of dual pulses. A receiver also includes an asymmetric interferometer that provides the same delay time as that between the dual pulses. The receiver allows pulses originating in the same light source to interfere, so that signals can be superimposed on the phase even when a low-coherency light source is used. The delay time (optical path length difference) provided in the asymmetric interferometer is set to be longer than half the period of the pulses outputted from the optical pulse source. In the transmitter, two pulses are modulated as a unit, one of the two pulses being the rear pulse of a pair of dual pulses and the other pulse being the front pulse of the next pair of dual pulses. In the receiver, a balanced detector receives the modulated pulses, and the balanced detector only outputs interference pulses but does not output non-interference pulses.

摘要翻译： 即使使用低相干光，信号也可以叠加在光学相位上，并且可以使用与普通光通信中使用的比特率和信号编码格式相似的比特率和信号编码格式。 发射机包括不对称干涉仪或抗压缩光发生器，以将单脉冲串转换成双脉冲串。 接收机还包括提供与双脉冲之间相同的延迟时间的不对称干涉仪。 接收器允许源自相同光源的脉冲干扰，使得即使使用低相干光源也可以将信号叠加在相位上。 将设置在非对称干涉仪中的延迟时间（光程差）设定为长于从光脉冲源输出的脉冲的周期的一半。 在发射机中，两个脉冲被调制为一个单元，两个脉冲之一是一对双脉冲的后脉冲，另一个脉冲是下一对双脉冲的前脉冲。 在接收机中，平衡检波器接收调制脉冲，平衡检波器仅输出干扰脉冲，但不输出不干扰脉冲。

公开(公告)号：US07457548B2

公开(公告)日：2008-11-25

申请号：US11071298

申请日：2005-03-04

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04B10/00 ,  H04B10/04 ,  H04K1/00

CPC分类号： H04B10/70 ,  H04L9/0858

摘要： A squeezed light generator comprises an arbitrary optical fiber, a means for temporally separating two linearly polarized components, two Faraday rotators and a high-reflection mirror. Pulse lights that are temporally separated into two orthogonally polarized components at an intensity ratio of 50:50 are reciprocatively propagated in the optical fiber, and the polarized light is rotated by 90° in an outward transmission. Since those two polarized components pass through the optical paths which are accurately equal to each other in the outward and homeward transmissions, those two polarized components interfere with each other accurately at 50:50 after reciprocation through the fiber. The interfered beam is separated by a polarizing beam splitter that is high in an extinction ratio. When the polarized lights before inputting the fiber and after reciprocating coincide with each other, it is unnecessary to maintain the polarization in the fiber propagation, and an arbitrary fiber can be used.

摘要翻译： 挤压光发生器包括任意光纤，用于时间分离两个线性偏振分量的装置，两个法拉第旋转器和高反射镜。 以50:50的强度比时间上分成两个正交极化分量的脉冲光在光纤中往复传播，偏振光在向外透射中旋转90°。 由于这两个偏振分量通过在向外和归位传输中彼此精确相等的光路，所以这两个偏振分量在通过光纤往复运动之后在50:50处精确地相互干扰。 受干扰的光束由消光比高的偏振光束分离器分离。 当在输入光纤之前和之后的偏振光相互重合时，不需要在光纤传播中保持极化，并且可以使用任意的光纤。

公开(公告)号：US20080085121A1

公开(公告)日：2008-04-10

申请号：US11905814

申请日：2007-10-04

申请人： Tatsuya Tomaru

发明人： Tatsuya Tomaru

IPC分类号： H04B10/00

CPC分类号： H04B10/85 ,  H04L9/0858

摘要： Regardless of a transmission basis, a phase of a signal light with reference to a phase of local light is measured, and an output light from an antisqueezed light source in a transponder device is modulated in accordance with the measured phase. Since information obtainable in the transponder device is only the relative phase of the signal light with reference to the phase of the local light, and includes fluctuations corresponding to an antisqueezed component of the signal light, even if the information in the transponder device is eavesdropped on, the information cannot be decoded easily.

摘要翻译： 不论传输方式如何，都测量相对于局部光的相位的信号光的相位，根据被测相位调制来自转发器装置的反压缩光源的输出光。 由于在应答器装置中可获得的信息仅是相对于局部光的相位的信号光的相对相位，并且包括对应于信号光的反压缩分量的波动，即使应答器装置中的信息被窃听 ，信息不能轻易解码。

公开(公告)号：US20070297810A1

公开(公告)日：2007-12-27

申请号：US11746687

申请日：2007-05-10

申请人： TATSUYA TOMARU

发明人： TATSUYA TOMARU

IPC分类号： H04B10/04

CPC分类号： H04B10/508 ,  H04B10/70 ,  Y10S385/901

摘要： An antisqueezed light generator system is built with only the components for optical communications with long-term reliability. A cw-LD light is made pulses by an intensity modulator and amplified by an optical amplifier. The amplified optical pulses are made short by high-order soliton pulse compression effect at a first optical fiber and peak power is increased. A fluctuation is expanded in a phase direction through propagation in a second optical fiber. Because an initial fluctuation is amplified by the optical amplifier, the fluctuation expanded in the phase direction is increased to the extent of the amplification and sufficient antisqueezing strength can be obtained.

摘要翻译： 一个反压缩光发生器系统，只有光通信的组件长期可靠。 cw-LD光由强度调制器产生脉冲，并由光放大器放大。 通过在第一光纤上的高阶孤子脉冲压缩效应使放大的光脉冲变短，并且峰值功率增加。 在第二光纤中通过传播而在相位方向上发生波动。 由于光放大器的初始波动被放大，所以在相位方向上扩大的波动增加到扩大的程度，并且可以获得足够的抗压强度。

公开(公告)号：US06587278B1

公开(公告)日：2003-07-01

申请号：US09524549

申请日：2000-03-13

申请人： Susumu Ogawa ,  Hrvoje Petek ,  Hisashi Nagano ,  Albert Heberle ,  Tatsuya Tomaru

发明人： Susumu Ogawa ,  Hrvoje Petek ,  Hisashi Nagano ,  Albert Heberle ,  Tatsuya Tomaru

IPC分类号： G02B2714

CPC分类号： H04B10/50 ,  G01J9/02

摘要： An optical signal synthesizer having an optical slab waveguide constructed from three layers in which optical pulses are introduced. A first cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens which collimates the introduced optical pulses, a second cut-away portion of the optical slab waveguide serving as a diffraction grating for parallel light beams in which the optical pulses are separated into every frequency, and a third cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens by which the separated optical pulses are focused on a different spatial position associated with each frequency. A spatial light modulator is fabricated at the focusing position in the optical slab waveguide which allows the optical pulses subjected to optical modulation every frequency to pass therethrough according to an applied electrical signal. A fourth cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens which collimates each modulated optical frequency component individually, and a fifth cut-away portion of the optical slab waveguide serving as a diffraction grating for the modulated optical pulses restores the modulated optical pulses to the parallel light beams.

摘要翻译： 一种光信号合成器，具有由三层构成的光学平板波导，其中引入了光脉冲。 光学平板波导的第一切除部分具有用作平行引入的光脉冲的平凸透镜的平凹形状，用作平行光的衍射光栅的光学平板波导的第二切除部分 其中光脉冲被分离成每个频率的光束，光学平板波导的第三切除部分具有用作平凸透镜的平凹形状，通过该平面凹形形状，分离的光脉冲聚焦在不同的空间位置 与每个频率相关联。 在光学平板波导中的聚焦位置处制造空间光调制器，其允许每个频率经受光调制的光脉冲根据所施加的电信号通过。 光学平板波导的第四切除部分具有平面凹形形状，用作将每个调制的光频率分量单独准直的平凸透镜，以及用作衍射光栅的光学平板波导的第五切除部分 对于调制的光脉冲，将调制的光脉冲恢复到平行光束。