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公开(公告)号：US06871084B1
公开(公告)日：2005-03-22
申请号：US09898402
申请日：2001-07-03
IPC分类号： A61B5/0408 , A61B5/0428 , A61B5/0478 , A61B5/04
CPC分类号： A61B5/0428 , A61B5/0408 , A61B5/0478
摘要： High-impedance optical electrodes modulate light in response to a life-form bio-potential and then converts the modulated light to an electrical signal that provides traditional EEG and EEC type output. Light splitters are used to provide multiple electrodes and an electronic reference source. A pilot tone is used to achieve high sensitivity and synchronize multiple units while an optical phase-shift modulator is used to reduce optical noise.
摘要翻译： 高阻抗光电极响应寿命形式的生物电位调制光，然后将调制的光转换成提供传统EEG和EEC类型输出的电信号。 分光器用于提供多个电极和电子参考源。 使用导频音来实现高灵敏度并同步多个单元，同时使用光相移调制器来降低光学噪声。
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公开(公告)号：US07447534B1
公开(公告)日：2008-11-04
申请号：US11085709
申请日：2005-03-21
IPC分类号： A61B5/04
CPC分类号： A61B5/0428 , A61B5/0408 , A61B5/0478
摘要： An electro-optic modulator modulates light in response to a life-form bio-potential to provide a bio-potential modulated light output. Modulation can be carried out as a result of capacitive coupling with the bio-potential. Phase, polarization, and intensity light modulation can be used. The light output can then be converted to electronic form for further processing. An optical power splitter is used to split light into multiple portions that are converted to electrical form. A pilot tone is used to achieve high sensitivity and synchronize multiple electro-optic modulators while phase modulation can be used to reduce noise in the bio-potential signal. Low-coherent light may be used as the light source. A housing is provided that can be hermetically-sealed and provided with electro-magnetic shielding.
摘要翻译： 电光调制器响应于生命形式的生物电位调制光以提供生物电位调制的光输出。 作为与生物电位的电容耦合的结果，可以进行调制。 可以使用相位，极化和强度光调制。 然后可以将光输出转换为电子表格以进行进一步处理。 光功率分配器用于将光分成转换成电形式的多个部分。 使用导频音来实现高灵敏度并同步多个电光调制器，同时可以使用相位调制来降低生物电位信号中的噪声。 低相干光可以用作光源。 提供可以被密封并且设置有电磁屏蔽的壳体。
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公开(公告)号：US06600843B2
公开(公告)日：2003-07-29
申请号：US10099173
申请日：2002-03-13
IPC分类号： G02F1035
CPC分类号： G02F1/225
摘要： An optical modulator has optical channels formed in a waveguide substrate in which two of the waveguide channel branches have reverse polarity relative to each other. In addition, the optical modulator has at least one of the following: 1) an electronic signal electrode and an electronic ground electrode are placed in proximity with opposite faces of the waveguide substrate, 2) a portion of said waveguide substrate is removed to afford a reduced electronic signal refractive index, and 3) the waveguide substrate has a fixing substrate attached to it with the refractive index of the fixing substrate lower than said refractive index of the waveguide substrate.
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公开(公告)号：US5267336A
公开(公告)日：1993-11-30
申请号：US878420
申请日：1992-05-04
CPC分类号： G02F1/225 , G01R1/07 , G01R29/0885 , G01R29/12 , G02F1/3558 , G02F2001/212
摘要： The invention relates to an electric field sensor useful in detecting and measuring wideband transient electrical responses by means of an integrated optical waveguide interferometer. Mach-Zehnder devices are produced wherein one waveguide channel has been reverse poled, or has domain inversion, preferably by means of titanium diffusion into said waveguide channel. Also produced is an electrode-less optical interferometer modulator by which an optical output signal is modulated at the same frequency as an applied electric field.
摘要翻译： 本发明涉及一种用于通过集成光波导干涉仪检测和测量宽带瞬态电响应的电场传感器。 制造马赫 - 策德尔装置，其中一个波导通道已经反向极化，或者具有域反转，优选地通过钛扩散到所述波导通道中。 还产生了无电极光干涉仪调制器，通过该调制器以与施加的电场相同的频率调制光输出信号。
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5.发明授权公开(公告)号：US06724179B2
公开(公告)日：2004-04-20
申请号：US10065680
申请日：2002-11-08
IPC分类号： G01R3100
CPC分类号： G01R15/241 , G01R19/02
摘要： An opto-electric device for measuring the root mean square value of an alternating current voltage has: a) an electric field-to-light-to-voltage converter having 1) a light source; 2) an electro-optic material: (a) receiving light from the light source; (b) modulating said light; and (c) providing a modulated light output; 3) an electric field applied to the electro-optic crystal to modulate the light from the light source to produce the modulated light output; b) an optical receiver for receiving and converting the modulated output light from the electro-optic material to a first voltage that is proportional to a square of the electric field applied to the electro-optic material; c) an averager circuit receiving the first voltage and providing a second voltage that is proportional to the average of said square of said electric field over a period of time; and d) an inverse ratiometric circuit receiving the second voltage from the averager circuit and returning a third voltage that is an inverse voltage of the second voltage to the electric field-to-light-to-voltage converter to produce an output voltage that is the root mean square voltage of the applied electric field. The device uses a Mach-Zehnder interferometer operating as a square law device and features a housing for maintaining the interferometer at constant temperature using a temperature control unit. A nulling circuit is provided to maintain the interferometer at it null operating point as are calibration circuits to correct for voltage amplitude and frequency changes.
摘要翻译： 用于测量交流电压的均方根值的光电装置具有：a）具有1）光源的电场到光电压转换器; 2）电光材料：（a）从光源接收光; （b）调制所述光; 和（c）提供调制光输出; 3）施加到电光晶体的电场以调制来自光源的光以产生调制光输出; b）一种光接收器，用于接收和将来自电光材料的调制输出光转换成与施加到电光材料的电场的平方成比例的第一电压; c）平均电路，接收所述第一电压并提供在一段时间内与所述电场平均值成比例的第二电压; 以及d）从平均电路接收第二电压并将作为第二电压的反向电压的第三电压返回到电场到光电压转换器的反比例电路，以产生作为 施加电场的均方根电压。 该装置使用作为平方律装置操作的马赫 - 曾德干涉仪，并且具有用于使用温度控制单元将干涉仪保持在恒定温度的壳体。 提供归零电路以将干涉仪保持在其零工作点，校准电路校正电压振幅和频率变化。
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6.发明授权公开(公告)号：US06479979B1
公开(公告)日：2002-11-12
申请号：US09610544
申请日：2000-07-04
IPC分类号： G01R3100
CPC分类号： G01R15/241 , G01R19/02
摘要： An opto-electric device for measuring the root mean square value of an alternating current voltage comprises: a) an electric field-to-light-to-voltage converter having 1) a light source; 2) an electro-optic material: (a) receiving light from the light source; (b) modulating said light; and (c) providing a modulated light output; 3) an electric field applied to the electro-optic crystal to modulate the light from the light source to produce the modulated light output; b) an optical receiver for receiving and converting the modulated output light from the electro-optic material to a first voltage that is proportional to a square of the electric field applied to the electro-optic material; c) an averager circuit receiving the first voltage and providing a second voltage that is proportional to the average of said square of said electric field over a period of time; and d) an inverse ratiometric circuit receiving the second voltage from the averager circuit and returning a third voltage that is an inverse voltage of the second voltage to the electric field-to-light-to-voltage converter to produce an output voltage that is the root mean square voltage of the applied electric field. The device uses a Mach_Zehnder interferometer operating a a square law device and features a housing for maintaining the interferometer at constant temperature using a temperature control unit. A nulling circuit is provided to maintain the interferometer at it null operating point as are calibration circuits to correct for voltage amplitude and frequency changes.
摘要翻译： 用于测量交流电压的均方根值的光电装置包括：a）具有1）光源的电场到光电压转换器; 2）电光材料：（a）从光源接收光; （b）调制所述光; 和（c）提供调制光输出; 3）施加到电光晶体的电场以调制来自光源的光以产生调制光输出; b）一种光接收器，用于接收和将来自电光材料的调制输出光转换成与施加到电光材料的电场的平方成比例的第一电压; c）平均电路，接收所述第一电压并提供在一段时间内与所述电场平均值成比例的第二电压; 以及d）从平均电路接收第二电压并将作为第二电压的反向电压的第三电压返回到电场到光电压转换器的反比例电路，以产生作为 施加电场的均方根电压。 该设备使用Mach_Zehnder干涉仪操作平方律设备，并具有外壳，用于使用温度控制单元将干涉仪保持在恒定温度。 提供归零电路以将干涉仪保持在其零工作点，校准电路校正电压振幅和频率变化。
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公开(公告)号：US4319186A
公开(公告)日：1982-03-09
申请号：US34666
申请日：1979-04-30
申请人： Stuart A. Kingsley
发明人： Stuart A. Kingsley
摘要： The presence of a signal is sensed by a signal transducer around which an optical fibre is wrapped so that the length of the fibre is modulated by any signal present. A laser supplies coherent light to one end of the fibre and a homodyne detector is provided at the other end. Discontinuities at both ends of the fibre cause multiple reflections which produce differential phase modulations of the signal. The detected signal contains a large number of frequency components and the peak frequency is related to the amplitude of the original signal. The peak frequency is indicated by a suitable filter arrangement.
摘要翻译： 信号的存在由信号传感器感测到，光纤被包裹在该信号传感器周围，使得光纤的长度被存在的任何信号调制。 激光器将相干光提供给光纤的一端，另一端提供零差检测器。 纤维两端的不连续性导致多次反射，产生信号的微分相位调制。 检测到的信号包含大量的频率分量，峰值频率与原始信号的振幅有关。 峰值频率由适当的滤波器布置指示。
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公开(公告)号：US5052820A
公开(公告)日：1991-10-01
申请号：US393977
申请日：1989-08-15
CPC分类号： G01K11/00 , G01K11/12 , Y10S252/962
摘要： Improved thermooptical sensing devices are provided wherein at various predetermined sectons of an optical fiber is juxtaposed a material characterized by a temperature dependent index of refraction. This material forms a temperature sensitive area which controls the transmission of light through the optical fiber thereby allowing detection of temperature changes along the fiber. The materials may be crystalline thermoplastic polymers, modified organic polymers containing inorganic modifiers, polymer systems containing discrete phases of organic polymers and inorganic additives or thermochromic inorganic compounds.
摘要翻译： 提供了改进的光学光学传感装置，其中在光纤的各种预定部分处并列有以温度依赖折射率为特征的材料。 该材料形成温度敏感区域，其控制通过光纤的光的透射，从而允许检测沿着光纤的温度变化。 该材料可以是结晶热塑性聚合物，含有无机改性剂的改性有机聚合物，含有有机聚合物的离散相的聚合物体系和无机添加剂或热变色无机化合物。
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公开(公告)号：US4408354A
公开(公告)日：1983-10-04
申请号：US223724
申请日：1981-01-09
IPC分类号： H04B10/2581 , H04B9/00
CPC分类号： H04B10/2581
摘要： A signal transmission system impresses phase-modulated signals on to a multimode optical fibre waveguide 1. In order to overcome the effects of fading caused by small random changes in the parameters of the fibre the signals from different modes are all combined to derive a resulting signal which is detected in a common detector 23. The signals may be combined by a vibrating mirror 21 which sweeps the emergent beam across detector 23. Alternatively the tip of fibre 1 may be vibrated to achieve a similar effect.
摘要翻译： 信号传输系统将相位调制信号提供给多模光纤波导1.为了克服由光纤参数中的小的随机变化引起的衰落的影响，来自不同模式的信号都被组合以得到结果信号 该信号可以在公共检测器23中检测。信号可以通过将检测器23扫射出射束的振动镜21组合。或者，光纤1的尖端可以被振动以实现类似的效果。
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公开(公告)号：US4236243A
公开(公告)日：1980-11-25
申请号：US29532
申请日：1979-04-12
IPC分类号： H04B10/00 , G02F1/01 , H04B10/04 , H04B10/06 , H04B10/142 , H04B10/152 , H04B10/20 , H04J14/00 , H04J14/02 , H04J14/04 , H04J14/06 , H04B9/00
CPC分类号： G02F1/0134 , H04B10/691
摘要： A telecommunication system has a laser-energized multimode optical fibre highway. Data is entered on to the highway by means of a series of modulators each operating at a different subcarrier frequency. At the far end of the highway demodulation is carried out be a quadrant photodetector which applies each of its outputs to a respective set of channels. Each channel in a set has a band pass filter centered on a subcarrier frequency followed by a non-linear device. The signals from all the channels of different sets carrying the same subcarrier frequency are combined and the signals passed through band pass filters centered on the second harmonic of the subcarrier frequency.
摘要翻译： 电信系统具有激光多功能光纤高速公路。 数据通过一系列在不同子载波频率下运行的调制器输入到高速公路。 在公路的远端，解调是将其每个输出应用于相应的一组信道的象限光电检测器。 一组中的每个通道具有以副载波频率为中心的带通滤波器，随后是非线性设备。 来自携带相同子载波频率的不同组的所有信道的信号被组合，并且信号通过以副载波频率的二次谐波为中心的带通滤波器。
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