公开(公告)号：US20070019285A1

公开(公告)日：2007-01-25

申请号：US11489725

申请日：2006-07-20

申请人： Shinobu Tamaoki ,  Toshihiko Kishimoto ,  Haruo Nakaji

发明人： Shinobu Tamaoki ,  Toshihiko Kishimoto ,  Haruo Nakaji

IPC分类号： H01S3/00 ,  H04B10/12

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/10015

摘要： The present invention relates to an optical amplifier with a structure for more effectively suppressing the over/undershoot in transient responses in high-speed AGC. This optical amplifier is an optical device for amplifying signal light inputted therein, and comprises a rare-earth-element-doped optical fiber, an optical coupler, a light-receiving section, a pumping light source, and a control section. In particular, as a typical structure of the optical amplifier, the rare-earth-element-doped optical fiber has a cutoff wavelength λc set longer than the pumping light wavelength λp but shorter than the signal light wavelength λs, and mainly allows a pumping light component in a fundamental mode to propagate therethrough. The pumping light and signal light are made incident on the first rare-earth-element-doped optical fiber such that only the pumping light component in the fundamental mode and a signal light component in the fundamental mode propagate through the first rare-earth-element-doped optical fiber in a state where the first rare-earth-element-doped optical fiber extends straight.

摘要翻译： 本发明涉及具有更有效地抑制高速AGC中的瞬态响应中的过冲/下冲的结构的光放大器。 该光放大器是用于放大其中输入的信号光的光学装置，并且包括稀土元素掺杂光纤，光耦合器，光接收部，泵浦光源和控制部。 特别地，作为光放大器的典型结构，稀土元素掺杂光纤具有比泵浦光波长lambdap长但比信号光波长lambdas短的截止波长长度，并且主要允许泵浦光 分量在基本模式中传播。 泵浦光和信号光入射到第一稀土元素掺杂光纤上，使得只有基模中的泵浦光分量和基模中的信号光分量通过第一稀土元素 掺杂光纤在第一稀土元素掺杂光纤直线延伸的状态下。

公开(公告)号：US07760423B2

公开(公告)日：2010-07-20

申请号：US11489725

申请日：2006-07-20

申请人： Shinobu Tamaoki ,  Toshihiko Kishimoto ,  Haruo Nakaji

发明人： Shinobu Tamaoki ,  Toshihiko Kishimoto ,  Haruo Nakaji

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/10015

摘要： The present invention relates to an optical amplifier with a structure for more effectively suppressing the over/undershoot in transient responses in high-speed AGC. This optical amplifier is an optical device for amplifying signal light inputted therein, and comprises a rare-earth-element-doped optical fiber, an optical coupler, a light-receiving section, a pumping light source, and a control section. In particular, as a typical structure of the optical amplifier, the rare-earth-element-doped optical fiber has a cutoff wavelength λc set longer than the pumping light wavelength λp but shorter than the signal light wavelength λs, and mainly allows a pumping light component in a fundamental mode to propagate therethrough. The pumping light and signal light are made incident on the first rare-earth-element-doped optical fiber such that only the pumping light component in the fundamental mode and a signal light component in the fundamental mode propagate through the first rare-earth-element-doped optical fiber in a state where the first rare-earth-element-doped optical fiber extends straight.

摘要翻译： 本发明涉及具有更有效地抑制高速AGC中的瞬态响应中的过冲/下冲的结构的光放大器。 该光放大器是用于放大其中输入的信号光的光学装置，并且包括稀土元素掺杂光纤，光耦合器，光接收部，泵浦光源和控制部。 特别地，作为光放大器的典型结构，稀土元素掺杂光纤具有比泵浦光波长λp长但短于信号光波长λs的截止波长λc，并且主要允许泵浦光 分量在基本模式中传播。 泵浦光和信号光入射到第一稀土元素掺杂光纤上，使得只有基模中的泵浦光分量和基模中的信号光分量通过第一稀土元素 掺杂光纤在第一稀土元素掺杂光纤直线延伸的状态下。

公开(公告)号：US20080094619A1

公开(公告)日：2008-04-24

申请号：US11976087

申请日：2007-10-19

申请人： Haruo Nakaji

发明人： Haruo Nakaji

IPC分类号： G02B27/32

CPC分类号： A61B5/14552 ,  A61B5/0059 ,  G02B6/03638 ,  G02B6/04

摘要： An object of the present invention is to provide an optical measuring device and optical measuring method capable of locally irradiating a measuring object with light and efficiently receiving reflection, scattered light, fluorescence, etc. from the measuring object.An optical measuring device according to the present invention has a light emitting portion; an irradiation waveguide for guiding light from the light emitting portion toward an object; a receiving waveguide for guiding light from the object; and a light receiving portion for receiving the light having been guided through the receiving waveguide; and is characterized in that a numerical aperture at a receiving end of the receiving waveguide is larger than a numerical aperture at an emission end of the irradiation waveguide.

摘要翻译： 本发明的目的是提供一种能够用光局部照射测量对象并有效地从测量对象接收反射，散射光，荧光等的光学测量装置和光学测量方法。 根据本发明的光学测量装置具有发光部分; 用于将来自发光部分的光引导到物体的照射波导; 用于引导来自物体的光的接收波导; 以及用于接收已经被引导通过接收波导的光的光接收部分; 其特征在于，所述接收波导的接收端的数值孔径大于所述照射波导的发射端的数值孔径。

公开(公告)号：US08654320B2

公开(公告)日：2014-02-18

申请号：US12995252

申请日：2009-05-25

申请人： Takemi Hasegawa ,  Tetsuya Hayashi ,  Haruo Nakaji

发明人： Takemi Hasegawa ,  Tetsuya Hayashi ,  Haruo Nakaji

IPC分类号： G01N21/00

CPC分类号： G01M11/3136 ,  G01M11/3145

摘要： An optical line monitoring apparatus and optical line monitoring system which can measure a reflectance distribution in an optical line with a high spatial resolution in a short time are provided. An optical line monitoring apparatus 14A provided in a station 10A comprises an OCDR measurement section 15 for carrying out OCDR measurement, an OTDR measurement section 16 for carrying out OTDR measurement, an optical switch 13 for selectively connecting one of the OCDR measurement section 15 and OTDR measurement section 16 to the optical coupler 12, a control section 17, and a storage device 18. The control section 17 performs a predetermined arithmetic operation according to an OCDR measurement result acquired by causing the OCDR measurement section 15 to carry out the OCDR measurement and an OTDR measurement result acquired by causing the OTDR measurement section 16 to carry out the OTDR measurement.

摘要翻译： 提供了一种能够在短时间内以高空间分辨率测量光线路中的反射率分布的光线路监视装置和光线路监视系统。 设置在站10A中的光线路监视装置14A包括用于执行OCDR测量的OCDR测量部分15，用于执行OTDR测量的OTDR测量部分16，用于选择性地连接OCDR测量部分15和OTDR之一的光开关13 测量部分16到光耦合器12，控制部分17和存储装置18.控制部分17根据通过使OCDR测量部分15执行OCDR测量而获得的OCDR测量结果执行预定的算术运算，并且 通过使OTDR测量部16执行OTDR测量而获得的OTDR测量结果。

公开(公告)号：US06987608B2

公开(公告)日：2006-01-17

申请号：US11107741

申请日：2005-04-18

申请人： Haruo Nakaji

发明人： Haruo Nakaji

IPC分类号： H01S3/00

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/10015 ,  H01S3/302 ,  H04B10/2916 ,  H04B10/296

摘要： A Raman amplifier can easily reduce the gain variation in Raman amplification even when the power of an input signal varies. The Raman amplifier is provided with (a) an optical fiber that Amplifies an input lightwave to produce an output lightwave, (b) a pump-lightwave-supplying means that supplies pump lightwaves having a plurality of wavelengths to the optical fiber, and (c) a control unit that controls only the power of the pump lightwave having the shortest wavelength among the pump lightwaves so that the average value of the gain of the Raman amplification by the optical fiber in an intended wavelength range can be maintained constant.

摘要翻译： 即使当输入信号的功率变化时，拉曼放大器也可以容易地减小拉曼放大的增益变化。 所述拉曼放大器设置有（a）放大输入光波以产生输出光波的光纤，（b）向光纤供给具有多个波长的泵浦光波的泵浦光波供给装置，（c ）控制单元，其仅控制泵浦光波中具有最短波长的泵浦光波的功率，使得光纤在预期波长范围内的拉曼放大的增益的平均值可以保持恒定。

公开(公告)号：US06738185B2

公开(公告)日：2004-05-18

申请号：US10231442

申请日：2002-08-30

申请人： Haruo Nakaji

发明人： Haruo Nakaji

IPC分类号： H01S300

CPC分类号： H04B10/2942 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/1301 ,  H04B10/296

摘要： The invention relates to an optical amplifier capable of achieving high-speed gain control in a wide dynamic range with a simpler constitution. A gain control circuit of the optical amplifier includes a first photodetector for outputting a voltage having a linear relation with power of part of signal light to be inputted to the optical amplifier medium, a second photodetector for outputting a voltage having a linear relation with power of part of the signal light amplified in the optical amplifier medium, a comparator for outputting a difference between the voltages respectively outputted from the first and second photodetectors, and a drive circuit for supplying a desired drive current to a pumping light source in response to the voltage outputted from the comparator. Each of the first and second photodetectors includes a photoelectric conversion element for performing conversion into an electric current in response to inputted optical power, and an operational amplifier for converting the electric current outputted from the photoelectric conversion element into a voltage. Particularly, at least one of the first and second photodetectors includes an adjusting mechanism for adjusting an offset of the outputted voltage.

摘要翻译： 本发明涉及一种能够以更简单的结构在宽动态范围内实现高速增益控制的光放大器。 光放大器的增益控制电路包括：第一光电检测器，用于输出与输入到光放大器介质的部分信号光的功率成线性关系的电压;第二光电检测器，用于输出与光放大器介质的功率线性关系的电压; 在光放大器介质中放大的信号光的一部分，用于输出分别从第一和第二光电检测器输出的电压之间的差的比较器和用于响应于电压而向泵浦光源提供期望的驱动电流的驱动电路 从比较器输出。 第一和第二光电检测器中的每一个包括用于响应于输入的光功率而转换为电流的光电转换元件和用于将从光电转换元件输出的电流转换为电压的运算放大器。 特别地，第一和第二光电检测器中的至少一个包括用于调整输出电压的偏移的调节机构。

公开(公告)号：US20050237601A1

公开(公告)日：2005-10-27

申请号：US11107741

申请日：2005-04-18

申请人： Haruo Nakaji

发明人： Haruo Nakaji

IPC分类号： G02F1/35 ,  G02B6/28 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/13 ,  H01S3/131 ,  H01S3/30

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/10015 ,  H01S3/302 ,  H04B10/2916 ,  H04B10/296

摘要： A Raman amplifier can easily reduce the gain variation in Raman amplification even when the power of an input signal varies. The Raman amplifier is provided with (a) an optical fiber that Amplifies an input lightwave to produce an output lightwave, (b) a pump-lightwave-supplying means that supplies pump lightwaves having a plurality of wavelengths to the optical fiber, and (c) a control unit that controls only the power of the pump lightwave having the shortest wavelength among the pump lightwaves so that the average value of the gain of the Raman amplification by the optical fiber in an intended wavelength range can be maintained constant.

摘要翻译： 即使当输入信号的功率变化时，拉曼放大器也可以容易地减小拉曼放大的增益变化。 所述拉曼放大器设置有（a）放大输入光波以产生输出光波的光纤，（b）向光纤供给具有多个波长的泵浦光波的泵浦光波供给装置，（c ）控制单元，其仅控制泵浦光波中具有最短波长的泵浦光波的功率，使得光纤在预期波长范围内的拉曼放大的增益的平均值可以保持恒定。

公开(公告)号：US06456428B1

公开(公告)日：2002-09-24

申请号：US09653952

申请日：2000-09-01

申请人： Haruo Nakaji ,  Motoki Kakui

发明人： Haruo Nakaji ,  Motoki Kakui

IPC分类号： H01S300

CPC分类号： H01S3/0675 ,  H01S3/06754 ,  H01S3/1301 ,  H01S3/1305

摘要： The present invention relates to an optical amplifier comprising a structure which prevents transmission quality from lowering and enables constant gain control with a higher speed and higher accuracy. In a typical embodiment of the present invention, amplified light from an EDF is once guided to an optical filter by way of an optical circulator. Of thus guided amplified light, noise light passes through the optical filter, whereas each of signal components is reflected thereby, so as to separate the noise light and signal components from each other. The noise light having passed through the optical filter is detected by a photodetector, and gain control is carried out by a gain control circuit so as to suppress fluctuations in the detected noise light power.

摘要翻译： 本发明涉及一种光放大器，其包括防止传输质量降低的结构，并且能够以更高的速度和更高的精度实现恒定的增益控制。 在本发明的典型实施例中，来自EDF的放大的光通过光循环器被一次引导到滤光器。 在这样引导的放大光中，噪声光通过滤光器，而每个信号分量被反射，从而将噪声光和信号分量彼此分离。 已经通过滤光器的噪声光被光检测器检测，并且增益控制由增益控制电路执行，以便抑制检测到的噪声光功率的波动。

公开(公告)号：US10912504B2

公开(公告)日：2021-02-09

申请号：US15111721

申请日：2015-01-14

申请人： Canon U.S.A. Inc. ,  The General Hospital Corporation ,  Haruo Nakaji ,  Maria Angela Franceschini ,  David Boas ,  Erin Buckley ,  Pei-Yi Lin ,  Stefan Carp

发明人： Haruo Nakaji ,  Maria Angela Franceschini ,  David Boas ,  Erin Buckley ,  Pei-Yi Lin ,  Stefan Carp

IPC分类号： A61B5/1455 ,  A61B5/026 ,  A61B5/00 ,  A61B5/145

摘要： There is provided herewith an apparatus, probe, and method for the combination of near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS). The apparatus, probe and method allow for the simultaneous detection of NIRS and DCS.

公开(公告)号：US20160345880A1

公开(公告)日：2016-12-01

申请号：US15111721

申请日：2015-01-14

申请人： Haruo NAKAJI ,  Maria FRANCESCHIN ,  Davis BOAS ,  Erin BUCKLEY ,  Pei-Yi LIN ,  Stefan CARP ,  CANON U.S.A. INC. ,  THE GENERAL HOSPITAL CORPORATION

发明人： Haruo Nakaji ,  Maria Angela Franceschini ,  David Boas ,  Erin Buckley ,  Pei-Yi Lin ,  Stefan Carp

IPC分类号： A61B5/1455 ,  A61B5/145 ,  A61B5/00 ,  A61B5/026

CPC分类号： A61B5/14552 ,  A61B5/0261 ,  A61B5/14546 ,  A61B5/14553 ,  A61B5/4064 ,  A61B5/4866 ,  A61B5/7225 ,  A61B5/7278 ,  A61B2562/0233 ,  A61B2562/0238

摘要： There is provided herewith an apparatus, probe, and method for the combination of near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS). The apparatus, probe and method allow for the simultaneous detection of NIRS and DCS.

摘要翻译： 本发明提供了用于近红外光谱（NIRS）和扩散相关光谱（DCS）组合的装置，探针和方法。 该装置，探头和方法允许同时检测NIRS和DCS。