公开(公告)号：US20090122317A1

公开(公告)日：2009-05-14

申请号：US11991542

申请日：2006-09-06

申请人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

发明人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

IPC分类号： G01N21/31 ,  G02B6/26

CPC分类号： G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/10 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/0697 ,  G02B6/2861

摘要： To achieve an apparatus capable of measuring a light absorption coefficient f a sample with high sensitivity. A ring down spectroscope uses a wavelength-variable femtosecond soliton pulse light source 1. Pulse light is input to a loop optical fiber 6 through a first light waveguide 4 and a wavelength selective switch 5. Ring down pulse light is input to a homodyne detector through the wavelength selective switch 5. On the other hand, pulse light propagating in the first light waveguide 4 is split and input to light waveguides constituting a second light waveguide 20 through an optical directional coupler 8 and a first optical switching element 12. The pulse light propagating in the second light waveguide 20 is input to the homodyne detector as reference light and used for synchronous detection. The plural light waveguides constituting the second light waveguide 20 differ in optical length in accordance with the length of the optical fiber 6, and can slightly change the optical length.

摘要翻译： 实现能够以高灵敏度测量样品的光吸收系数f的装置。 环形光谱仪使用波长可变飞秒激光脉冲光源1.脉冲光通过第一光波导4和波长选择开关5输入到环形光纤6中。环形脉冲光通过 波长选择开关5.另一方面，在第一光波导4中传播的脉冲光通过光学定向耦合器8和第一光开关元件12被分离并输入到构成第二光波导20的光波导上。脉冲光 在第二光波导20中传播的信号被输入到零差检测器作为参考光，并用于同步检测。 构成第二光波导路20的多个光波导根据光纤6的长度的光学长度不同，并且可以稍微改变光学长度。

公开(公告)号：US07855788B2

公开(公告)日：2010-12-21

申请号：US11991542

申请日：2006-09-06

申请人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

发明人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

IPC分类号： G01B9/02 ,  G01J3/45

CPC分类号： G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/10 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/0697 ,  G02B6/2861

摘要： To achieve an apparatus capable of measuring a light absorption coefficient f a sample with high sensitivity. A ring down spectroscope uses a wavelength-variable femtosecond soliton pulse light source 1. Pulse light is input to a loop optical fiber 6 through a first light waveguide 4 and a wavelength selective switch 5. Ring down pulse light is input to a homodyne detector through the wavelength selective switch 5. On the other hand, pulse light propagating in the first light waveguide 4 is split and input to light waveguides constituting a second light waveguide 20 through an optical directional coupler 8 and a first optical switching element 12. The pulse light propagating in the second light waveguide 20 is input to the homodyne detector as reference light and used for synchronous detection. The plural light waveguides constituting the second light waveguide 20 differ in optical length in accordance with the length of the optical fiber 6, and can slightly change the optical length.

摘要翻译： 实现能够以高灵敏度测量样品的光吸收系数f的装置。 环形光谱仪使用波长可变飞秒激光脉冲光源1.脉冲光通过第一光波导4和波长选择开关5输入到环形光纤6中。环形脉冲光通过 波长选择开关5.另一方面，在第一光波导4中传播的脉冲光通过光学定向耦合器8和第一光开关元件12被分离并输入到构成第二光波导20的光波导上。脉冲光 在第二光波导20中传播的信号被输入到零差检测器作为参考光，并用于同步检测。 构成第二光波导路20的多个光波导根据光纤6的长度的光学长度不同，并且可以稍微改变光学长度。

公开(公告)号：US08351039B2

公开(公告)日：2013-01-08

申请号：US12926027

申请日：2010-10-21

申请人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

发明人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

IPC分类号： G01N21/00

CPC分类号： G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/10 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/0697 ,  G02B6/2861

摘要： A spectroscopy method, includes guiding pulse laser light to an optical fiber, which mutually reacts with a sample to be measured of a light absorptance characteristic, outputting ring down pulse light obtained through light absorption of the sample, measuring an absorptance characteristic of the sample based on an attenuation characteristic of the ring down pulse light, and setting the pulse laser light as wide-spectrum laser light, setting the optical fiber as a strong dispersive optical fiber, and increasing a pulse width of the ring down pulse light to measure a wavelength absorptance characteristic based on a ring down attenuation constant of a pulse train with respect to a time sequence corresponding to a wavelength.

摘要翻译： 光谱学方法包括将脉冲激光引导到与待测样品相互反应的光吸收特性的光纤，输出通过样品的光吸收获得的环形脉冲光，测量样品的吸收特性 根据环形脉冲光的衰减特性，将脉冲激光设定为宽光谱激光，将光纤设为强分散光纤，增加环形脉冲光的脉冲宽度，测定波长 基于相对于对应于波长的时间序列的脉冲序列的衰减衰减常数的吸收特性。

公开(公告)号：US20110063609A1

公开(公告)日：2011-03-17

申请号：US12926027

申请日：2010-10-21

申请人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

发明人： Masafumi Ito ,  Norihiko Nishizawa ,  Masaru Hori ,  Toshio Goto ,  Hiroyuki Kano

IPC分类号： G01J3/42 ,  G01N21/25

CPC分类号： G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/0224 ,  G01J3/10 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/0697 ,  G02B6/2861

摘要： A spectroscopy method, includes guiding pulse laser light to an optical fiber, which mutually reacts with a sample to be measured of a light absorptance characteristic, outputting ring down pulse light obtained through light absorption of the sample, measuring an absorptance characteristic of the sample based on an attenuation characteristic of the ring down pulse light, and setting the pulse laser light as wide-spectrum laser light, setting the optical fiber as a strong dispersive optical fiber, and increasing a pulse width of the ring down pulse light to measure a wavelength absorptance characteristic based on a ring down attenuation constant of a pulse train with respect to a time sequence corresponding to a wavelength.

摘要翻译： 光谱学方法包括将脉冲激光引导到与待测样品相互反应的光吸收特性的光纤，输出通过样品的光吸收获得的环形脉冲光，测量样品的吸收特性 根据环形脉冲光的衰减特性，将脉冲激光设定为宽光谱激光，将光纤设为强分散光纤，增加环形脉冲光的脉冲宽度，测定波长 基于相对于对应于波长的时间序列的脉冲序列的衰减衰减常数的吸收特性。

公开(公告)号：US20050226289A1

公开(公告)日：2005-10-13

申请号：US11156462

申请日：2005-06-21

申请人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

发明人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

IPC分类号： G02F1/365 ,  H01S3/00 ,  H01S3/067 ,  H01S3/13

CPC分类号： H01S3/067 ,  G02F1/365 ,  H01S3/0057 ,  H01S3/06725

摘要： A broadband optical spectrum generating apparatus 20 includes a ultrashort pulsed fiber laser 22 that generates pulsed light having a pulse width in the unit of picosecond to femtosecond, and broadband optical spectrum-generating optical fibers 24 that are connected with the ultrashort pulse fiber laser 22 via a lens 26 and have characteristics of normal dispersion, that is, a nonlinear coefficient of not less than 10 [W−1km−1] and a magnitude of wavelength dispersion of not greater than a value 0 [ps/km/nm] with regard to a wavelength of the pulsed light. The resulting output is super continuum that is widely broadened to a wavelength band of 1400 nm to 1750 nm and is chirped to a linear characteristic.

摘要翻译： 宽带光谱发生装置20包括产生具有以皮秒为单位的脉冲宽度的脉冲光的超短脉冲光纤激光器22以及与超短脉冲光纤激光器22连接的宽带光谱产生光纤24，经由 透镜26具有正常色散的特性，也就是说，非线性系数不小于10 [W -1 -1]]>，并且波长色散的大小 不大于相对于脉冲光的波长的值0 [ps / km / nm]。 所得到的输出是超连续谱，其广泛地扩展到1400nm至1750nm的波长带，并被啁啾成线性特征。

公开(公告)号：US06925236B2

公开(公告)日：2005-08-02

申请号：US10231131

申请日：2002-08-30

申请人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

发明人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

IPC分类号： G02F1/365 ,  H01S3/00 ,  H01S3/067 ,  G02B6/00

CPC分类号： H01S3/067 ,  G02F1/365 ,  H01S3/0057 ,  H01S3/06725

摘要： A broadband optical spectrum generating apparatus 20 includes a ultrashort pulsed fiber laser 22 that generates pulsed light having a pulse width in the unit of picosecond to femtosecond, and broadband optical spectrum-generating optical fibers 24 that are connected with the ultrashort pulse fiber laser 22 via a lens 26 and have characteristics of normal dispersion, that is, a nonlinear coefficient of not less than 10 [W−1 km−1] and a magnitude of wavelength dispersion of not greater than a value 0 [ps/km/nm] with regard to a wavelength of the pulsed light. The resulting output is super continuum that is widely broadened to a wavelength band of 1400 nm to 1750 nm and is chirped to a linear characteristic.

摘要翻译： 宽带光谱发生装置20包括产生具有以皮秒为单位的脉冲宽度的脉冲光的超短脉冲光纤激光器22以及与超短脉冲光纤激光器22连接的宽带光谱产生光纤24，经由 透镜26具有正常色散的特性，也就是说，非线性系数不小于10 [W -1 -1]]>，并且波长色散的大小 不大于相对于脉冲光的波长的值0 [ps / km / nm]。 所得到的输出是超连续谱，其广泛地扩展到1400nm至1750nm的波长带，并被啁啾成线性特征。

公开(公告)号：US07535555B2

公开(公告)日：2009-05-19

申请号：US11384296

申请日：2006-03-21

申请人： Norihiko Nishizawa ,  Toshio Goto

发明人： Norihiko Nishizawa ,  Toshio Goto

IPC分类号： G01C3/08

CPC分类号： G01S17/10 ,  G01S7/4817 ,  G01S7/4818 ,  G01S7/484 ,  G01S7/4865 ,  G01S7/487

摘要： A distance measurement device that provides high speed and accuracy. A light divider separates pulsed light emitted from an ultrashort pulse fiber laser into reference light A and signal light. A scanning mirror unit irradiates an object with the signal light and receives scattered light B, which is reflected from the object. An optical path length adjustment unit adjusts an optical path length of the reference light A. A differential detector detects the degree of interference of the reference light A having the adjusted optical path length with the scattered light B and outputs the detected degree of interference as an interference signal. A computer specifies an adjustment value, set in the optical path length adjustment unit, to attain a specific optical path length maximizing the interference signal and uses the specified adjustment value to compute the distance from the scanning mirror unit to the object.

摘要翻译： 一种提供高速度和准确度的距离测量装置。 分光器将从超短脉冲光纤激光器发射的脉冲光分离成参考光A和信号光。 扫描镜单元用信号光照射物体并接收从物体反射的散射光B. 光路长度调节单元调整参考光A的光程长度。差分检测器检测具有调整光程长度的参考光A与散射光B的干涉程度，并将检测到的干涉度输出为 干扰信号。 计算机指定设置在光路长度调整单元中的调整值，以获得使干扰信号最大化的特定光程长度，并使用指定的调整值来计算从扫描镜单元到对象的距离。

公开(公告)号：US07376302B2

公开(公告)日：2008-05-20

申请号：US11156462

申请日：2005-06-21

申请人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

发明人： Toshio Goto ,  Norihiko Nishizawa ,  Youta Ito

IPC分类号： G02B6/26

CPC分类号： H01S3/067 ,  G02F1/365 ,  H01S3/0057 ,  H01S3/06725

摘要： A broadband optical spectrum generating apparatus 20 includes a ultrashort pulsed fiber laser 22 that generates pulsed light having a pulse width in the unit of picosecond to femtosecond, and broadband optical spectrum-generating optical fibers 24 that are connected with the ultrashort pulse fiber laser 22 via a lens 26 and have characteristics of normal dispersion, that is, a nonlinear coefficient of not less than 10 [W−1km−1] and a magnitude of wavelength dispersion of not greater than a value 0 [ps/km/nm] with regard to a wavelength of the pulsed light. The resulting output is super continuum that is widely broadened to a wavelength band of 1400 nm to 1750 nm and is chirped to a linear characteristic.

摘要翻译： 宽带光谱发生装置20包括产生具有以皮秒为单位的脉冲宽度的脉冲光的超短脉冲光纤激光器22以及与超短脉冲光纤激光器22连接的宽带光谱产生光纤24，经由 透镜26具有正常色散的特性，也就是说，非线性系数不小于10 [W -1 -1]]>，并且波长色散的大小 不大于相对于脉冲光的波长的值0 [ps / km / nm]。 所得到的输出是超连续谱，其广泛地扩展到1400nm至1750nm的波长带，并被啁啾成线性特征。

公开(公告)号：US06618531B1

公开(公告)日：2003-09-09

申请号：US09787609

申请日：2001-03-20

申请人： Toshio Goto ,  Norihiko Nishizawa

发明人： Toshio Goto ,  Norihiko Nishizawa

IPC分类号： G02F135

CPC分类号： G02F1/3526 ,  G02F1/3513 ,  G02F1/3536 ,  G02F1/37 ,  G02F1/383 ,  H04B10/25077

摘要： A compact apparatus and a method for generating wavelength-tunable short optical pulses, which apparatus and method can change the wavelength of generated pulses without adjustment of an optical system and enable generation of ideal femtosecond soliton pulses. The apparatus includes a short-optical-pulse source, an optical characteristic regulation unit for regulating characteristics of light output from the short-optical-pulse source, and an optical fiber for receiving input pulses from the optical characteristic regulation unit and for changing the wavelength of output pulses linearly. Short optical pulses are input to the optical fiber, so that new soliton pulses are generated in the optical fiber due to its nonlinear effect. Further, the nonlinear effect enables the wavelength of the soliton pulses to shift linearly in accordance with the intensity of input light.

摘要翻译： 一种用于产生波长可调短光脉冲的紧凑装置和方法，该装置和方法可以在不调整光学系统的情况下改变产生的脉冲的波长并且能够产生理想的飞秒孤子脉冲。 该装置包括短光脉冲源，用于调节从短光脉冲源输出的光的特性的光学特性调节单元和用于从光学特性调节单元接收输入脉冲并用于改变波长的光纤 的输出脉冲线性。 短光脉冲被输入到光纤中，由于其非线性效应，在光纤中产生新的孤子脉冲。 此外，非线性效应使得孤子脉冲的波长能够根据输入光的强度线性地移动。

公开(公告)号：US06339602B1

公开(公告)日：2002-01-15

申请号：US09492323

申请日：2000-01-27

申请人： Toshio Goto ,  Norihiko Nishizawa

发明人： Toshio Goto ,  Norihiko Nishizawa

IPC分类号： H10S330

CPC分类号： H01S3/302 ,  H01S3/067 ,  H01S3/06712 ,  H01S3/094046

摘要： An apparatus for generating plural pulse light beams includes a polarization maintaining fiber operating as a plural pulse light generating device. When a short pulse light beam is launched into the polarization maintaining fiber from a fiber laser source, two polarized components of the light beam are generated in the polarization maintaining fiber and perpendicularly intersect each other. Then, the resulting induced Raman Effect and Soliton Effect relative to each polarized component of the light causes a soliton pulse having a wavelength longer than the corresponding component.

摘要翻译： 用于产生多个脉冲光束的装置包括作为多个脉冲光产生装置工作的偏振保持光纤。 当短脉冲光束从光纤激光源发射到偏振保持光纤中时，在偏振保持光纤中产生光束的两个偏振分量并且彼此垂直相交。 然后，相对于光的每个偏振分量产生的诱导拉曼效应和孤子效应导致波长比相应组分长的孤子脉冲。