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公开(公告)号：US07236247B2
公开(公告)日：2007-06-26
申请号：US11356275
申请日：2006-02-16
IPC分类号： G01N21/59
CPC分类号： G01N21/21 , G01J11/00 , G01N21/4788 , G01N21/636 , G01N2021/4723 , G01N2021/4735
摘要： A method for measuring a physical function forms a symmetric composite function by combining the physical function with a reference function. The method obtains a Fourier transform of the symmetric composite function. The method calculates an inverse Fourier transform of the obtained Fourier transform, wherein the calculated inverse Fourier transform provides information regarding the physical function. The physical function can be a nonlinearity profile of a sample with at least one sample surface. The physical function can alternatively by a sample temporal waveform of a sample optical pulse.
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32.发明授权公开(公告)号：US07133134B2
公开(公告)日：2006-11-07
申请号：US10357275
申请日：2003-01-31
IPC分类号： G01N21/59
CPC分类号： G01J11/00 , G01N21/636
摘要： A method measures a physical function, such as a second-order optical nonlinearity profile, or a temporal waveform of a laser pulse. The method includes forming a symmetric composite function by superimposing the physical function with a substantially identical physical function. The method further includes obtaining a Fourier transform of the symmetric composite function. The method further includes calculating an inverse Fourier transform of the obtained Fourier transform. The calculated inverse Fourier transform provides information regarding the physical function.
摘要翻译： 一种方法测量诸如二阶光学非线性轮廓或激光脉冲的时间波形的物理功能。 该方法包括通过将物理功能与基本相同的物理功能叠加来形成对称复合函数。 该方法还包括获得对称复合函数的傅里叶变换。 该方法还包括计算所获得的傅里叶变换的傅立叶逆变换。 计算的傅里叶逆变换提供有关物理功能的信息。
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公开(公告)号：US6097486A
公开(公告)日：2000-08-01
申请号：US253446
申请日：1999-02-19
CPC分类号： G01D5/35383
摘要： A fiber optic acoustic sensor array is based upon a Sagnac interferometer rather than being based upon Mach-Zehnder interferometers as in known acoustic sensor arrays. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the sensor array on the Sagnac interferometer rather than on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, has a larger dynamic range, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.
摘要翻译： 光纤声学传感器阵列基于Sagnac干涉仪，而不是像已知的声学传感器阵列中的基于马赫 - 曾德尔干涉仪。 光纤声学传感器阵列用于检测水中的声波。 通过将传感器阵列基于Sagnac干涉仪而不是Mach-Zehnder干涉仪，传感器阵列具有稳定的偏置点，具有降低的相位噪声，具有较大的动态范围，并且允许使用宽带信号源而不是要求 一个更昂贵的窄线激光。 大量的声传感器可以复用到Sagnac干涉仪的架构中。
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公开(公告)号：US08289521B2
公开(公告)日：2012-10-16
申请号：US13027873
申请日：2011-02-15
IPC分类号： G01C19/72
CPC分类号： G01C19/721
摘要： A fiber-optic sensor includes an optical fiber coil and a laser source optically coupled to the coil. Light from the source is transmitted to the coil as a first optical signal and a second optical signal counter-propagating through the coil. The optical paths of the first optical signal and the second optical signal are substantially reciprocal with one another and the first optical signal and the second optical signal are combined together after counter-propagating through the coil to generate a third optical signal. The laser source is frequency-modulated or can have a coherence length longer than a length of the coil.
摘要翻译： 光纤传感器包括光纤线圈和光耦合到线圈的激光源。 来自光源的光作为第一光信号传输到线圈，第二光信号通过线圈反向传播。 第一光信号和第二光信号的光路基本上互相倒数，并且第一光信号和第二光信号在通过线圈反向传播之后被组合在一起，以产生第三光信号。 激光源被调频，或者可以具有比线圈长度更长的相干长度。
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公开(公告)号：US08082117B2
公开(公告)日：2011-12-20
申请号：US12623322
申请日：2009-11-20
摘要： A method utilizes an optical image processing system. The method includes providing a measured magnitude of the Fourier transform of a complex transmission function of an object or optical image. The method further includes providing an estimated phase term of the Fourier transform of the complex transmission function. The method further includes multiplying the measured magnitude and the estimated phase term to generate an estimated Fourier transform of the complex transmission function. The method further includes calculating an inverse Fourier transform of the estimated Fourier transform, wherein the inverse Fourier transform is a spatial function. The method further includes calculating an estimated complex transmission function by applying at least one constraint to the inverse Fourier transform.
摘要翻译： 一种方法利用光学图像处理系统。 该方法包括提供物体或光学图像的复数传输函数的傅里叶变换的测量幅度。 该方法还包括提供复传输函数的傅立叶变换的估计相位项。 该方法还包括将测量的幅度和估计的相位项相乘以产生复数传输函数的估计傅里叶变换。 该方法还包括计算傅立叶逆变换的傅立叶逆变换，其中逆傅里叶变换是空间函数。 该方法还包括通过对傅里叶逆变换应用至少一个约束来计算估计的复传输函数。
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36.发明授权Apparatus for measuring a frequency-domain optical coherence tomography power spectrum from a sample 有权用于从样本测量频域光学相干断层摄影功率谱的装置公开(公告)号：US08032322B2
公开(公告)日：2011-10-04
申请号：US12372225
申请日：2009-02-17
CPC分类号： A61B5/0066 , A61B5/0073 , A61B5/7257 , G01B9/02044 , G01B9/02083 , G01B9/02091 , G01N21/4795
摘要： An apparatus is provided for measuring a frequency-domain optical coherence tomography power spectrum from a sample. The apparatus includes a broadband light source, an optical spectrum analyzer, and a partially reflective element optically coupled to the light source, to the optical spectrum analyzer, and to the sample. A first portion of light from the light source is reflected by the partially reflective element and propagates to the optical spectrum analyzer. A second portion of light from the light source propagating through the partially reflective element, impinging the sample, reflecting from the sample, and propagating to the optical spectrum analyzer.
摘要翻译： 提供了一种用于从样本测量频域光学相干断层摄影功率谱的装置。 该装置包括宽带光源，光谱分析仪和与光源光耦合到光谱分析仪和样品的部分反射元件。 来自光源的光的第一部分被部分反射元件反射并传播到光谱分析仪。 来自光源的光的第二部分传播通过部分反射元件，撞击样品，从样品反射并传播到光谱分析仪。
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37.发明授权Er-doped superfluorescent fiber source with enhanced mean wavelength stability 有权掺铒超荧光光纤源，具有增强的平均波长稳定性公开(公告)号：US07269190B2
公开(公告)日：2007-09-11
申请号：US10676543
申请日：2003-10-01
IPC分类号： H01S3/13
CPC分类号： H01S3/06754 , H01S3/0064 , H01S3/06795 , H01S3/094023 , H01S3/10007 , H01S3/10069 , H01S3/1608
摘要： An erbium-doped (Er-doped) superfluorescent fiber source (SFS) has an enhanced mean wavelength stability. A method determines an estimated mean wavelength of a SFS. The method includes providing an Er-doped SFS having an actual mean wavelength. The method further includes configuring the SFS such that the actual mean wavelength has a dependence on the temperature of the EDF. The method further includes obtaining the dependence of the actual mean wavelength on the temperature of the EDF. The method further includes measuring the temperature of the EDF. The method further includes calculating the estimated mean wavelength using the measured temperature of the EDF and the dependence of the actual mean wavelength on the temperature of the EDF.
摘要翻译： 铒掺杂（Er掺杂）超荧光光纤源（SFS）具有增强的平均波长稳定性。 一种方法确定SFS的估计平均波长。 该方法包括提供具有实际平均波长的Er掺杂SFS。 该方法还包括配置SFS，使得实际平均波长与EDF的温度有关。 该方法还包括获得实际平均波长对EDF温度的依赖性。 该方法还包括测量EDF的温度。 该方法还包括使用EDF的测量温度和实际平均波长对EDF的温度的依赖性来计算估计的平均波长。
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38.发明授权公开(公告)号：US07236246B2
公开(公告)日：2007-06-26
申请号：US11355614
申请日：2006-02-16
IPC分类号： G01N21/59
CPC分类号： G01N21/21 , G01J11/00 , G01N21/4788 , G01N21/636 , G01N2021/4723 , G01N2021/4735
摘要： A method for measuring a physical function forms a symmetric composite function by combining the physical function with a reference function. The method obtains a Fourier transform of the symmetric composite function. The method calculates an inverse Fourier transform of the obtained Fourier transform, wherein the calculated inverse Fourier transform provides information regarding the physical function. The physical function can be a nonlinearity profile of a sample with at least one sample surface. The physical function can alternatively by a sample temporal waveform of a sample optical pulse.
摘要翻译： 用于测量物理功能的方法通过将物理功能与参考功能组合来形成对称复合函数。 该方法获得对称复合函数的傅立叶变换。 该方法计算所获得的傅立叶变换的傅立叶逆变换，其中所计算的傅里叶逆变换提供关于物理功能的信息。 物理功能可以是具有至少一个样品表面的样品的非线性分布。 物理功能可以替代地通过采样光脉冲的采样时间波形。
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公开(公告)号：US06385354B1
公开(公告)日：2002-05-07
申请号：US09259832
申请日：1999-03-01
申请人： Michel J. F. Digonnet , Alice Liu , Gordon S. Kino
发明人： Michel J. F. Digonnet , Alice Liu , Gordon S. Kino
IPC分类号： G02F101
CPC分类号： G02F1/0134 , G02F1/3136
摘要： An apparatus modulates the phase of an optical signal. The apparatus includes an optical medium for propagating the optical signal. At least one electrode is positioned in proximity with the medium. The electrode induces an electric field within the medium in response to an AC voltage to produce variations in the index of refraction of the optical medium through the electrostrictive effect. Preferably, the phase of the optical signal is modulated such that polarization components of the optical signal parallel to and orthogonal to the electric field experience an equal phase shift. In certain embodiments, a DC voltage is supplied to the optical medium. Alternatively, the DC voltage within the optical medium may arise from (or be enhanced by) poling the optical medium. Certain embodiments of the present invention include two electrodes positioned on opposite sides of the optical medium. The apparatus is advantageously used in an interferometer to form a device that modulates the amplitude of the optical signal. The apparatus may also be used in an interferometer to form an optical switching device.
摘要翻译： 一种装置调制光信号的相位。 该装置包括用于传播光信号的光学介质。 至少一个电极定位在介质附近。 电极响应于AC电压在介质内引起电场，以通过电致伸缩效应产生光学介质的折射率的变化。 优选地，调制光信号的相位，使得平行于和与电场正交的光信号的偏振分量经历相等的相移。 在某些实施例中，DC电压被提供给光学介质。 或者，光学介质内的DC电压可以由（或通过）光学介质极化而产生。 本发明的某些实施例包括位于光学介质的相对侧上的两个电极。 该装置有利地用于干涉仪中以形成调制光信号幅度的装置。 该装置还可用于干涉仪中以形成光开关装置。
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40.发明授权Tunable, mechanically induced long-period fiber grating with enhanced polarizing characteristics 有权可调谐，机械诱导具有增强的偏振特性的长周期光纤光栅公开(公告)号：US06282341B1
公开(公告)日：2001-08-28
申请号：US09469744
申请日：1999-12-21
IPC分类号： G02B634
CPC分类号： G02B6/02071 , G02B6/02095 , G02B6/02109 , G02B6/022 , G02B6/274 , G02B6/2793 , H01S3/0675 , H01S2301/04
摘要： A new type of fiber filter is useable in optical communication systems. In particular, the fiber filter may be used to flatten the gain of erbium-doped fiber amplifiers (EDFAs). Such gain flattening is important for long-haul, dense (wavelength dependent multiplexed) WDM communication systems. The filter includes a periodic mechanical structure pressed against the side of a single-mode fiber to induce a wavelength-dependent loss in a signal propagating in the fiber core by coupling the signal to fiber cladding modes. The mechanical structure is a periodic comb of small ridges. Each ridge induces a local index change in the fiber via the photoelastic effect. For coupling to the right cladding modes, the period of the grating (and the comb) is in the range of few hundreds of microns. Thus, the grating is easy to fabricate with standard machining equipment.
摘要翻译： 一种新型的光纤滤波器可用于光通信系统。 特别地，光纤滤波器可用于平坦化掺铒光纤放大器（EDFA）的增益。 这种增益平坦化对于长距离密集（波长相关多路复用）WDM通信系统是重要的。 滤波器包括按照单模光纤侧面的周期性机械结构，以通过将信号耦合到光纤包层模式来引起在光纤芯中传播的信号中的波长相关损耗。 机械结构是小脊的周期梳。 每个脊通过光弹效应引起纤维中的局部折射率变化。 为了耦合到正确的包层模式，光栅（和梳子）的周期在几百微米的范围内。 因此，光栅易于用标准的加工设备制造。
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