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1. 发明授权

US08478134B2 Compression of generated optical continuum utilizing higher-order-mode fiber 有权
标题翻译：使用高阶模光纤压缩产生的光连续谱
公开(公告)号：US08478134B2
公开(公告)日：2013-07-02
申请号：US12584096
申请日：2009-08-31
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： H04B10/04 , H04B10/12
CPC分类号： H01S3/0057 , G02B6/02023 , G02B6/14 , G02B6/29376 , G02F1/353 , G02F2001/3528 , H01S3/005 , H01S3/0092
摘要： An arrangement for providing pulse compression at the output of an optical continuum source (advantageously used in spectral slicing applications) includes a section of higher-order mode (HOM) fiber configured to exhibit a predetermined dispersion in at least a portion of the predetermined wavelength range and an effective area greater than 40 μm2, the dispersion of the HOM fiber selected to compensate for the dispersion introduced by the optical continuum source. The HOM fiber generates a compressed pulse output therefrom. An input mode converter is used to convert the created continuum from the fundamental mode associated with the conventional continuum sources to the higher-order mode(s) supported by the HOM fiber used to perform pulse compression. A bandpass filter is used to limit the bandwidth of the continuum signal to that associated with both the efficient conversion range of the mode converter and desired dispersion characteristic of the HOM fiber.
摘要翻译：用于在光学连续谱源的输出端（有利地用于光谱切片应用）中提供脉冲压缩的装置包括：高阶模式（HOM）光纤的一部分，被配置为在预定波长范围的至少一部分中呈现预定色散并且有效面积大于40mum2，选择HOM纤维的色散以补偿由光学连续谱源引入的色散。 HOM光纤从其产生压缩脉冲输出。输入模式转换器用于将创建的连续体从与常规连续谱相关联的基本模式转换为由用于执行脉冲压缩的HOM光纤支持的高阶模式。带通滤波器用于将连续信号的带宽限制为与模式转换器的有效转换范围和HOM光纤的期望色散特性相关联的带宽。

2. 发明申请

US20110052197A1 Compression of generated optical continuum utilizing higher-order-mode fiber 有权
标题翻译：使用高阶模光纤压缩产生的光连续谱
公开(公告)号：US20110052197A1
公开(公告)日：2011-03-03
申请号：US12584096
申请日：2009-08-31
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： H04J14/02 , G02B6/26
CPC分类号： H01S3/0057 , G02B6/02023 , G02B6/14 , G02B6/29376 , G02F1/353 , G02F2001/3528 , H01S3/005 , H01S3/0092
摘要： An arrangement for providing pulse compression at the output of an optical continuum source (advantageously used in spectral slicing applications) includes a section of higher-order mode (HOM) fiber configured to exhibit a predetermined dispersion in at least a portion of the predetermined wavelength range and an effective area greater than 40 μm2, the dispersion of the HOM fiber selected to compensate for the dispersion introduced by the optical continuum source. The HOM fiber generates a compressed pulse output therefrom. An input mode converter is used to convert the created continuum from the fundamental mode associated with the conventional continuum sources to the higher-order mode(s) supported by the HOM fiber used to perform pulse compression. A bandpass filter is used to limit the bandwidth of the continuum signal to that associated with both the efficient conversion range of the mode converter and desired dispersion characteristic of the HOM fiber.
摘要翻译：用于在光学连续谱源的输出端（有利地用于光谱切片应用）中提供脉冲压缩的装置包括：高阶模式（HOM）光纤的一部分，被配置为在预定波长范围的至少一部分中呈现预定色散和大于40μm2的有效面积，选择的HOM纤维的色散补偿由光学连续谱源引入的色散。 HOM光纤从其产生压缩脉冲输出。输入模式转换器用于将创建的连续体从与常规连续谱相关联的基本模式转换为由用于执行脉冲压缩的HOM光纤支持的高阶模式。带通滤波器用于将连续信号的带宽限制为与模式转换器的有效转换范围和HOM光纤的期望色散特性相关联的带宽。

3. 发明授权

US07817258B2 Measuring modal content of multi-moded fibers 有权
标题翻译：测量多模光纤的模态含量
公开(公告)号：US07817258B2
公开(公告)日：2010-10-19
申请号：US12214629
申请日：2008-06-20
申请人： Poul Kristensen , Jeffrey W. Nicholson , Siddharth Ramachandran , Andrew D. Yablon
发明人： Poul Kristensen , Jeffrey W. Nicholson , Siddharth Ramachandran , Andrew D. Yablon
IPC分类号： G01N21/00
CPC分类号： G01M11/335 , G01M11/331
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber.
摘要翻译：可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。

4. 发明授权

US08507877B2 Non-linear optical system and techniques 有权
标题翻译：非线性光学系统和技术
公开(公告)号：US08507877B2
公开(公告)日：2013-08-13
申请号：US12954292
申请日：2010-11-24
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： G01J1/58
CPC分类号： G02B21/0032 , G02B21/0072 , G02B21/0076 , G02F1/35
摘要： Methods and systems are described using a non-linear optical system comprising a laser and a light delivery system comprising a single mode fiber, a mode converter, and a high order mode fiber, wherein the light delivery system that receives light from the source and provides a structured free-space beam having an embedded Gaussian beam. The light delivery system functions to illuminate a region of a sample and generate a non-linear response in a spatial region smaller than that associated with a Gaussian beam having a width comparable to the width of the embedded Gaussian beam. In another aspect, the light delivery system illuminates a region of a sample and generates a non-linear emission of radiation, is depicted. A further aspect of this embodiment includes an imaging assembly for detecting the non-linear emission and using a signal derived from the detected emission to generate a microscopic image of the sample.
摘要翻译：使用包括激光器和包括单模光纤，模式转换器和高阶模式光纤的光输送系统的非线性光学系统来描述方法和系统，其中所述光输送系统从源接收光并提供具有嵌入高斯光束的结构化自由空间光束。光传送系统用于照亮样本的区域，并且在小于与具有与嵌入的高斯光束的宽度相当的宽度的高斯光束相关联的空间区域中产生非线性响应。在另一方面，光传输系统照亮样品的区域并产生非线性辐射辐射。该实施例的另一方面包括用于检测非线性发射并使用从检测到的发射导出的信号以产生样本的微观图像的成像组件。

5. 发明申请

US20110210269A1 Non-Linear Optical System and Techniques 有权
标题翻译：非线性光学系统和技术
公开(公告)号：US20110210269A1
公开(公告)日：2011-09-01
申请号：US12954292
申请日：2010-11-24
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： G01J1/58 , G02F1/35 , G02F1/37 , G01J3/44 , G21K5/00
CPC分类号： G02B21/0032 , G02B21/0072 , G02B21/0076 , G02F1/35
摘要： Methods and systems are described using a non-linear optical system comprising a laser and a light delivery system comprising a single mode fiber, a mode converter, and a high order mode fiber, wherein the light delivery system that receives light from the source and provides a structured free-space beam having an embedded Gaussian beam. The light delivery system functions to illuminate a region of a sample and generate a non-linear response in a spatial region smaller than that associated with a Gaussian beam having a width comparable to the width of the embedded Gaussian beam. In another aspect, the light delivery system illuminates a region of a sample and generates a non-linear emission of radiation, is depicted. A further aspect of this embodiment includes an imaging assembly for detecting the non-linear emission and using a signal derived from the detected emission to generate a microscopic image of the sample.
摘要翻译：使用包括激光器和包括单模光纤，模式转换器和高阶模式光纤的光输送系统的非线性光学系统来描述方法和系统，其中所述光输送系统从源接收光并提供具有嵌入高斯光束的结构化自由空间光束。光传送系统用于照亮样本的区域，并且在小于与具有与嵌入的高斯光束的宽度相当的宽度的高斯光束相关联的空间区域中产生非线性响应。在另一方面，光传输系统照亮样品的区域并产生非线性辐射辐射。该实施例的另一方面包括用于检测非线性发射并使用从检测到的发射导出的信号以产生样本的微观图像的成像组件。

6. 发明授权

US07826499B2 Visible continuum generation utilizing a hybrid optical source 有权
标题翻译：利用混合光源的可见连续谱生成
公开(公告)号：US07826499B2
公开(公告)日：2010-11-02
申请号：US11888844
申请日：2007-08-02
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： H01S3/30
CPC分类号： G02F1/365 , G02F2001/3528 , G02F2202/32
摘要： An all-fiber supercontinuum source is formed as a hybrid combination of a first section of continuum-generating fiber (such as, for example, highly-nonlinear fiber (HNLF)) spliced to a second section of continuum-extending fiber (such as, for example, photonic crystal fiber (PCF)). The second section of fiber is selected to exhibit an anomalous dispersion value in the region of the short wavelength edge of the continuum generated by the first section of fiber. A femtosecond pulse laser source may be used to supply input pulses to the section of HNLF, and the section of PCF is spliced to the termination of the section of HNLF. A section of single mode fiber (SMF) is preferably inserted between the output of the laser source and the HNLF to compress the femtosecond pulses prior to entering the HNLF. It has been found that the hybrid combination of these two types of fibers allows for extension of the continuum on the short wavelength side—into the visible portion of the spectrum—by virtue of the first section of fiber acting as a “pump” source for the second section of fiber.
摘要翻译：全纤维超连续谱源形成为连接发光纤维（例如高非线性光纤（HNLF））的第一部分与连续扩展光纤的第二部分（例如，例如，光子晶体光纤（PCF））。纤维的第二部分被选择为在由第一纤维部分产生的连续体的短波长边缘的区域中呈现出异常色散值。可以使用飞秒脉冲激光源来向HNLF的部分提供输入脉冲，并且将PCF的部分拼接到HNLF部分的终端。单模光纤（SMF）的一部分优选地插入在激光源的输出端和HNLF之间，以在进入HNLF之前压缩飞秒脉冲。已经发现，这两种类型的纤维的混合组合允许通过作为“泵”源的纤维的第一部分将短波长侧的连续体延伸到光谱的可见部分中第二节纤维。

7. 发明申请

US20090034562A1 Visible continuum generation utilizing a hybrid optical source 有权
标题翻译：利用混合光源的可见连续谱生成
公开(公告)号：US20090034562A1
公开(公告)日：2009-02-05
申请号：US11888844
申请日：2007-08-02
申请人： Jeffrey W. Nicholson , Siddharth Ramachandran
发明人： Jeffrey W. Nicholson , Siddharth Ramachandran
IPC分类号： H01S3/30
CPC分类号： G02F1/365 , G02F2001/3528 , G02F2202/32
摘要： An all-fiber supercontinuum source is formed as a hybrid combination of a first section of continuum-generating fiber (such as, for example, highly-nonlinear fiber (HNLF)) spliced to a second section of continuum-extending fiber (such as, for example, photonic crystal fiber (PCF)). The second section of fiber is selected to exhibit an anomalous dispersion value in the region of the short wavelength edge of the continuum generated by the first section of fiber. A femtosecond pulse laser source may be used to supply input pulses to the section of HNLF, and the section of PCF is spliced to the termination of the section of HNLF. A section of single mode fiber (SMF) is preferably inserted between the output of the laser source and the HNLF to compress the femtosecond pulses prior to entering the HNLF. It has been found that the hybrid combination of these two types of fibers allows for extension of the continuum on the short wavelength side—into the visible portion of the spectrum—by virtue of the first section of fiber acting as a “pump” source for the second section of fiber.
摘要翻译：全纤维超连续谱源形成为连接发光纤维（例如高非线性光纤（HNLF））的第一部分与连续扩展光纤的第二部分（例如，例如，光子晶体光纤（PCF））。纤维的第二部分被选择为在由第一纤维部分产生的连续体的短波长边缘的区域中呈现出异常色散值。可以使用飞秒脉冲激光源来向HNLF的部分提供输入脉冲，并且将PCF的部分拼接到HNLF部分的终端。单模光纤（SMF）的一部分优选地插入在激光源的输出端和HNLF之间，以在进入HNLF之前压缩飞秒脉冲。已经发现，这两种类型的纤维的混合组合允许通过作为“泵”源的纤维的第一部分将短波长侧的连续体延伸到光谱的可见部分中第二节纤维。

8. 发明申请

US20090185171A1 Measuring modal content of multi-moded fibers 有权
标题翻译：测量多模光纤的模态含量
公开(公告)号：US20090185171A1
公开(公告)日：2009-07-23
申请号：US12214629
申请日：2008-06-20
申请人： Poul Kristensen , Jeffrey W. Nicholson , Siddharth Ramachandran , Andrew D. Yablon
发明人： Poul Kristensen , Jeffrey W. Nicholson , Siddharth Ramachandran , Andrew D. Yablon
IPC分类号： G01N21/00
CPC分类号： G01M11/335 , G01M11/331
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber.
摘要翻译：可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。

9. 发明授权

US08591777B2 Method of controlling longitudinal properties of optical fiber 有权
标题翻译：控制光纤纵向特性的方法
公开(公告)号：US08591777B2
公开(公告)日：2013-11-26
申请号：US12316740
申请日：2008-12-15
申请人： David J. DiGiovanni , Jeffrey W. Nicholson , Paul S. Westbrook , Man F. Yan
发明人： David J. DiGiovanni , Jeffrey W. Nicholson , Paul S. Westbrook , Man F. Yan
IPC分类号： B29D11/00
CPC分类号： G02B6/02247 , C03C25/62
摘要： A method of creating optical fiber to exhibit predetermined length-dependent characteristics (e.g., chromatic dispersion, polarization mode dispersion, cutoff wavelength, birefringence) includes the steps of: characterizing the fiber's selected characteristic(s) as a function of length; and performing a “treatment” which modifies the refractive index over the given length to adjust the defined parameter to fall within a defined tolerance window. These steps may be repeated one or more times until the measure of the parameter falls with the defined tolerance limits. The treatment process may include, for example, a low energy actinic radiation exposure, anneal, mechanical strain, DC voltage, plasma application, etc. Indeed, if the treatment process is repeated, a different technique may be used to adjust the refractive index (“different” processes include, for example, modifying the strength/time of a UV exposure, temperatures for annealing, etc.).
摘要翻译：产生光纤以呈现预定长度相关特性（例如，色散，偏振模色散，截止波长，双折射）的方法包括以下步骤：将光纤的选定特性表征为长度的函数; 并且执行修改在给定长度上的折射率的“处理”，以将限定的参数调整到落入限定的公差窗内。这些步骤可以重复一次或多次，直到参数的测量值与定义的公差极限一致。处理过程可以包括例如低能量光化辐射暴露，退火，机械应变，DC电压，等离子体施加等。实际上，如果重复处理过程，则可以使用不同的技术来调节折射率（ “不同”方法包括例如改变UV暴露的强度/时间，退火温度等）。

10. 发明授权

US08111386B2 Measuring modal content of multi-moded fibers 有权
标题翻译：测量多模光纤的模态含量
公开(公告)号：US08111386B2
公开(公告)日：2012-02-07
申请号：US12454089
申请日：2009-05-12
申请人： Jeffrey W. Nicholson , Andrew D. Yablon
发明人： Jeffrey W. Nicholson , Andrew D. Yablon
IPC分类号： G01N21/00
CPC分类号： G01N21/412 , G01M11/331 , G01M11/335
摘要： The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By spatially resolving the interference, an image of the spatial beat pattern between two modes may be constructed, thereby providing information about the modes supported by the optical fiber. Measurements of the phase front exiting the optical fiber under test are advantageously performed in the far field.
摘要翻译：可以通过测量光纤中共同传播模式之间的干扰来分析和量化包含多于一个空间模式的光纤的输出模态含量。通过空间分辨干扰，可以构建两种模式之间的空间拍图的图像，从而提供关于由光纤支持的模式的信息。有利的是在远场进行离开待测光纤的相位前沿的测量。

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