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1. 发明申请

US20090034966A1 Optical Signal Monitoring Apparatus and Method 有权
标题翻译：光信号监测装置及方法
公开(公告)号：US20090034966A1
公开(公告)日：2009-02-05
申请号：US12087476
申请日：2007-12-11
申请人： Takao Tanimoto , Akihito Otani
发明人： Takao Tanimoto , Akihito Otani
IPC分类号： H04B17/00
CPC分类号： H04B10/677 , H04B10/0795 , H04B10/07953 , H04B10/60
摘要： An optical signal monitoring apparatus includes an optical interference unit, a sampling optical pulse generation unit, an optical sampling unit, a photoelectric converter, and a computation unit. The optical interference unit includes an optical brancher, a delay device, an optical phase adjuster, and an optical multiplexer. The optical brancher branches a monitoring object signal optical signal phase-modulated at a predetermined symbol rate into two optical paths. The delay device imparts delay corresponding to an integral multiple of one symbol to an optical signal branched in one optical path of the two optical paths. The optical phase adjuster brings an optical signal emitted delay device and an optical signal branched in another optical path of the two optical paths into a predetermined optical phase difference. The optical multiplexer multiplexes the optical signals which are brought into the predetermined optical phase difference, and converts the phase-modulated monitoring object optical signal into intensity-modulated light to emit the intensity-modulated light. The sampling optical pulse generation unit generates a sampling optical pulse having a period which is different from a predetermined offset time to integral multiplication of a symbol clock period corresponding to the predetermined symbol rate. The optical sampling unit samples the intensity-modulated light using the sampling optical pulse and emits an optical pulse signal.
摘要翻译：光信号监控装置包括光干涉单元，采样光脉冲发生单元，光采样单元，光电转换器和计算单元。光干涉单元包括光分支器，延迟器，光相位调节器和光复用器。光分支器将以预定符号速率相位调制的监视对象信号光信号分支成两个光路。延迟装置将对应于一个符号的整数倍的延迟赋予在两个光路的一个光路中分支的光信号。光相位调节器将光信号发射延迟器件和在两个光路的另一光路中分支的光信号转换成预定的光相位差。光复用器将被带入预定光学相位差的光信号复用，并将相位调制的监视对象光信号转换为强度调制的光以发射强度调制的光。采样光脉冲产生单元产生具有与预定偏移时间不同的周期的采样光脉冲，以对应于预定符号率的符号时钟周期的积分乘法。光采样单元采用采样光脉冲对强度调制光进行采样，并发出光脉冲信号。

2. 发明授权

US4799789A Chromatic dispersion measuring system for optical fibers 失效
公开(公告)号：US4799789A
公开(公告)日：1989-01-24
申请号：US159888
申请日：1988-02-24
申请人： Takeshi Tsukamoto , Takao Tanimoto , Hidetoshi Miyao
发明人： Takeshi Tsukamoto , Takao Tanimoto , Hidetoshi Miyao
IPC分类号： G01M11/00 , G01N21/41 , G01N21/84
CPC分类号： G01N21/41 , G01M11/333 , G01M11/335 , G01M11/338
摘要： A system for measuring a chromatic dispersion of an optical fiber based on a baseband phase comparison method has an optical signal transmitter, a reference optical fiber, a measurement optical fiber, and an optical signal receiver. The transmitter has n light sources for selectively generating, as measurement optical signals, optical signals having wavelengths corresponding to n wavelength points to be measured. One of the n light sources also serves to generate a reference optical signal. The transmitter further has an optical switch. The optical switch has n optical signal inputs arranged in correspondence with the n light sources, a measurement optical signal output, and a reference optical signal output. The optical switch commonly outputs, to the measurement optical signal output, the measurement optical signal which is output from the designated one of the n light sources and is selectively input to the n optical signal inputs. A half mirror is provided for outputting the reference optical signal generated by one of the n light sources to the reference signal output. The optical signal receiver is coupled to the reference optical fiber and the measurement optical fiber, and receives the reference optical signal from the reference optical fiber and the measurement optical signal from the measurement optical fiber, respectively, for measuring chromatic dispersion. The receiver includes a plurality of programmable optical attenuators.

3. 发明申请

US20100150548A1 Optical Signal Quality Monitoring Apparatus and Method 有权
标题翻译：光信号质量监测装置及方法
公开(公告)号：US20100150548A1
公开(公告)日：2010-06-17
申请号：US12085876
申请日：2007-12-11
申请人： Akihito Otani , Takao Tanimoto
发明人： Akihito Otani , Takao Tanimoto
IPC分类号： H04B10/08
CPC分类号： G01J11/00 , H04B10/0795
摘要： A sampling optical pulse generation unit emits a sampling optical pulse. The sampling optical pulse has a period different from a predetermined offset time to integral multiplication of a clock period of a data signal, and the data signal modulates an optical signal of a monitoring target. An optical sampling unit performs sampling of the optical signal of the monitoring target using an electroabsorption optical modulator. The electroabsorption optical modulator has a characteristic in which an absorption index is changed with respect to light propagating through an optical path according to a level of an electric field. The optical signal of the monitoring target is input into one of two optical terminals of the electroabsorption optical modulator. The sampling optical pulse is input into another of the two optical terminals through a photocoupler. The absorption index with respect to the optical signal of the monitoring target is lowered by generating a mutual absorption saturation characteristic of the electroabsorption optical modulator when the sampling optical pulse is supplied, and the sampling of the optical signal of the monitoring target is performed to output an optical pulse signal from the other of the two optical terminals through the photocoupler.
摘要翻译：采样光脉冲发生单元发射采样光脉冲。采样光脉冲具有与数据信号的时钟周期的预定偏移时间到积分相乘的周期，并且数据信号调制监视对象的光信号。光采样单元使用电吸收光调制器对监视对象的光信号进行采样。电吸收光调制器具有其吸收指数相对于根据电场的水平通过光路传播的光而改变的特性。监测对象的光信号被输入到电吸收光调制器的两个光端中的一个。采样光脉冲通过光电耦合器输入到两个光学终端中的另一个。当提供采样光脉冲时，通过产生电吸收光调制器的相互吸收饱和特性来降低监测对象的光信号的吸收指数，并且执行监视对象的光信号的采样以输出通过光耦合器的两个光学终端中的另一个的光脉冲信号。

4. 发明授权

US08098995B2 Optical signal synchronization sampling apparatus and method, and optical signal monitoring apparatus and method using the same 有权
标题翻译：光信号同步采样装置及方法，以及光信号监测装置及其使用方法
公开(公告)号：US08098995B2
公开(公告)日：2012-01-17
申请号：US12160072
申请日：2007-12-11
申请人： Akihito Otani , Takao Tanimoto
发明人： Akihito Otani , Takao Tanimoto
IPC分类号： H04B10/00
CPC分类号： G02F1/0121 , G01J11/00 , G02F1/091 , G02F2001/0157
摘要： An electroabsorption optical modulator used as a sampling element has two optical terminals and a power supply terminal, the two optical terminals are used to input and output light, and the power supply terminal imparts an electric field to an optical path connecting the two optical terminals. The electroabsorption optical modulator has a characteristic in which an absorption index is changed with respect to the light beam propagating through the optical path according to a level of the electric field. A monitoring (synchronization sampling) object optical signal is input into one of the two optical terminals of the electroabsorption optical modulator. A predetermined direct-current voltage exhibiting a high absorption index for the monitoring (synchronization sampling) object optical signal is imparted to the power supply terminal of the electroabsorption optical modulator. A sampling optical pulse is input into another of the two optical terminals of the electroabsorption optical modulator through a photocoupler. The absorption index for the monitoring (synchronization sampling) object optical signal is lowered by a mutual absorption saturation characteristic of the electroabsorption optical modulator, and synchronization sampling of the monitoring (synchronization sampling) object optical signal is performed to supply an optical signal from the other of the two optical terminals of the electroabsorption optical modulator through the photocoupler. The mutual absorption saturation characteristic is generated when the sampling optical pulse is input into the other of the two optical terminals.
摘要翻译：用作采样元件的电吸收光调制器具有两个光端子和电源端子，两个光端子用于输入和输出光，并且电源端子向连接两个光端子的光路施加电场。电吸收光调制器具有根据电场的水平相对于通过光路传播的光束而改变吸收指数的特性。监视（同步采样）对象光信号被输入到电吸收光调制器的两个光端中的一个。向电吸收光调制器的电源端子施加用于监视（同步采样）物体光信号的具有高吸收指数的预定直流电压。采样光脉冲通过光电耦合器输入到电吸收光调制器的两个光端中的另一个。通过电吸收光调制器的相互吸收饱和特性降低监视（同步采样）物体光信号的吸收指数，并执行监视（同步采样）对象光信号的同步采样，以提供来自另一个的光信号通过光电耦合器的电吸收光调制器的两个光学端子。当采样光脉冲输入到两个光学终端中的另一个时产生相互吸收饱和特性。

5. 发明授权

US08050558B2 Optical signal sampling apparatus and method and optical signal monitor apparatus and method using the same 有权
标题翻译：光信号采样装置及方法及光信号监测装置及其使用方法
公开(公告)号：US08050558B2
公开(公告)日：2011-11-01
申请号：US12308264
申请日：2008-05-21
申请人： Akihito Otani , Takao Tanimoto
发明人： Akihito Otani , Takao Tanimoto
IPC分类号： H04B10/08
CPC分类号： G01J11/00
摘要： The optical signal sampling apparatus and the optical signal monitor apparatus are configured of an optical combiner for combining an optical signal to be sampled and a sampling light pulse with each other and an electroabsorption modulator. The electroabsorption modulator has two optical terminals for inputting/outputting the light and a power supply terminal for applying the electric field to the optical path connecting the two optical terminals, and has such a characteristic that the absorption rate of the light propagating through the optical path changes in accordance with the magnitude of the electric field, the light emitted from the optical combiner is received by one of the two optical terminals, and the absorption rate is increased when the sampling light pulse is not incident while the absorption rate is decreased when the sampling light pulse is incident. Further, the apparatuses include a DC power supply for applying a predetermined DC voltage to the power supply terminal and an optical separator for selectively emitting the optical signal component to be sampled, of the optical signals emitted from another of the two optical terminals.
摘要翻译：光信号采样装置和光信号监视装置由用于将要采样的光信号和采样光脉冲彼此组合的光合并器和电吸收调制器构成。电吸收调制器具有用于输入/输出光的两个光学端子和用于将电场施加到连接两个光学端子的光路的电源端子，并且具有这样的特征，即通过光路传播的光的吸收率根据电场的大小变化，由光组合器发射的光由两个光学终端中的一个接收，并且当采样光脉冲不入射时吸收率增加，同时吸收率降低时吸收率增加采样光脉冲是入射的。此外，这些装置包括用于向电源端子施加预定DC电压的DC电源和用于选择性地发射从两个光学终端中的另一个发射的光信号的要采样的光信号分量的光隔离器。

6. 发明授权

US08019218B2 Optical signal monitoring apparatus and method 有权
标题翻译：光信号监测装置及方法
公开(公告)号：US08019218B2
公开(公告)日：2011-09-13
申请号：US12087476
申请日：2007-12-11
申请人： Takao Tanimoto , Akihito Otani
发明人： Takao Tanimoto , Akihito Otani
IPC分类号： H04B17/00 , H04B10/08
CPC分类号： H04B10/677 , H04B10/0795 , H04B10/07953 , H04B10/60
摘要： An optical signal monitoring apparatus includes an optical interference unit, a sampling optical pulse generation unit, an optical sampling unit, a photoelectric converter, and a computation unit. The optical interference unit includes an optical brancher, a delay device, an optical phase adjuster, and an optical multiplexer. The optical brancher branches a monitoring object signal optical signal phase-modulated at a predetermined symbol rate into two optical paths. The delay device imparts delay corresponding to an integral multiple of one symbol to an optical signal branched in one optical path of the two optical paths. The optical phase adjuster brings an optical signal emitted delay device and an optical signal branched in another optical path of the two optical paths into a predetermined optical phase difference. The optical multiplexer multiplexes the optical signals which are brought into the predetermined optical phase difference, and converts the phase-modulated monitoring object optical signal into intensity-modulated light to emit the intensity-modulated light. The sampling optical pulse generation unit generates a sampling optical pulse having a period which is different from a predetermined offset time to integral multiplication of a symbol clock period corresponding to the predetermined symbol rate. The optical sampling unit samples the intensity-modulated light using the sampling optical pulse and emits an optical pulse signal.
摘要翻译：光信号监控装置包括光干涉单元，采样光脉冲发生单元，光采样单元，光电转换器和计算单元。光干涉单元包括光分支器，延迟器，光相位调节器和光复用器。光分支器将以预定符号速率相位调制的监视对象信号光信号分支成两个光路。延迟装置将对应于一个符号的整数倍的延迟赋予在两个光路的一个光路中分支的光信号。光相位调节器将光信号发射延迟器件和在两个光路的另一光路中分支的光信号转换成预定的光相位差。光复用器将被带入预定光学相位差的光信号复用，并将相位调制的监视对象光信号转换为强度调制的光以发射强度调制的光。采样光脉冲产生单元产生具有与预定偏移时间不同的周期的采样光脉冲，以对应于预定符号率的符号时钟周期的积分乘法。光采样单元采用采样光脉冲对强度调制光进行采样，并发出光脉冲信号。

7. 发明授权

US06618401B2 Variable wavelength light source 失效
标题翻译：可变波长光源
公开(公告)号：US06618401B2
公开(公告)日：2003-09-09
申请号：US09980570
申请日：2001-10-31
申请人： Takao Tanimoto , Toshiyuki Ozaki , Masanori Takizawa
发明人： Takao Tanimoto , Toshiyuki Ozaki , Masanori Takizawa
IPC分类号： H01S310
CPC分类号： H01S5/141 , H01S5/0617 , H01S5/0687 , H01S5/143
摘要： A tunable laser source changes the resonator length of an external resonator, which is constituted including a laser diode and a diffraction grating, by a driver controlled by a drive control section, to continuously or intermittently vary the wavelength of an emitted light from a start wavelength to a stop wavelength that are desired. A point wavelength information setting section sets the point wavelength information representing the positional information of the driver that corresponds to each resonator length of the external resonator regarding the start wavelength, the stop wavelength and a plurality of the wavelengths obtained by dividing a period between the start wavelength and the stop wavelength into arbitrary steps. An emitted wavelength information detecting section detects emitted wavelength information corresponding to the wavelength of the emitted light from the tunable laser source. A matching determination section determines whether or not the emitted wavelength information detected by the emitted wavelength information detecting section matches each point wavelength information set by the point wavelength information setting section. An information output section outputs predetermined information to the outside, when determination that the emitted wavelength information matches each point wavelength information is obtained from the matching determination section.
摘要翻译：可调激光源通过由驱动控制部控制的驱动器改变包括激光二极管和衍射光栅的外部谐振器的谐振器长度，以连续或间歇地改变来自起始波长的发射光的波长到期望的停止波长。点波长信息设置部分设置表示与外部谐振器的每个谐振器长度相对应的驱动器的位置信息的点波长信息，关于开始波长，停止波长以及通过将开始之间的周期除以多个波长波长和停止波长进入任意步骤。发射波长信息检测部分检测与可调激光源的发射光的波长相对应的发射波长信息。匹配确定部分确定由发射波长信息检测部分检测到的发射波长信息是否与由点波长信息设置部分设置的每个点波长信息匹配。当从匹配确定部分获得确定发出的波长信息与每个点波长信息匹配时，信息输出部分向外部输出预定信息。

8. 发明授权

US6069697A Optical transmission characteristic measuring apparatus and calibration method using the same 失效
标题翻译：光传输特性测量装置及使用其的校准方法
公开(公告)号：US6069697A
公开(公告)日：2000-05-30
申请号：US62484
申请日：1998-04-17
申请人： Takao Tanimoto , Hiroaki Endo , Hiroaki Ohtateme , Muneo Ishiwata , Yasuaki Nagashima
发明人： Takao Tanimoto , Hiroaki Endo , Hiroaki Ohtateme , Muneo Ishiwata , Yasuaki Nagashima
IPC分类号： G01M11/00 , G01J3/28
CPC分类号： G01M11/337
摘要： A processing unit reads out, from a memory, wavelength setting data corresponding to wavelength information from a key input section, and outputs a wavelength setting command corresponding to the wavelength setting data to a tunable-wavelength control section and a spectral wavelength control section. The tunable-wavelength control section controls a tunable-wavelength light source section to output a laser beam having a wavelength corresponding to the wavelength setting data. The spectral wavelength control section controls a spectroscope section to perform spectroscopy of the light having the wavelength corresponding to the wavelength setting data and output the resultant light. Output light from the tunable-wavelength light source section whose wavelength has been set is input to an object to be measured. Light passing through the object is input to the spectroscope section. The spectroscope section performs spectroscopy of only the light having the wavelength corresponding to the wavelength setting data. A light-receiving section receives the spectral light and photoelectrically converts it. The resultant light is converted into digital data by an A/D conversion section to be input as level data to a processing unit. The processing unit obtains a light-reception level on the basis of the digital level data.
摘要翻译：处理单元从存储器读出与键输入部分相对应的波长信息的波长设置数据，并将与波长设置数据相对应的波长设置命令输出到可调谐波长控制部分和光谱波长控制部分。可调波长控制部分控制可调谐波长光源部分，以输出具有对应于波长设置数据的波长的激光束。光谱波长控制部分控制分光镜部分对具有与波长设置数据相对应的波长的光进行光谱分析并输出所得到的光。将波长设定的可调谐波长光源部的输出光输入到被测量物体。通过物体的光被输入到分光器部分。分光器部分仅对具有与波长设置数据相对应的波长的光进行光谱分析。光接收部分接收光谱光并对其进行光电转换。所得到的光由A / D转换部分转换为数字数据，作为电平数据输入到处理单元。处理单元基于数字电平数据获得光接收电平。

9. 发明授权

US4799790A Chromatic dispersion measuring system for optical fibers 失效
标题翻译：光纤色散测量系统
公开(公告)号：US4799790A
公开(公告)日：1989-01-24
申请号：US159838
申请日：1988-02-24
申请人： Takeshi Tsukamoto , Takao Tanimoto
发明人： Takeshi Tsukamoto , Takao Tanimoto
IPC分类号： G01M11/02 , G01M11/00 , G01N21/41 , G02B6/00 , G01N21/84
CPC分类号： G01M11/335 , G01M11/333 , G01M11/338 , G01N21/41
摘要： A system for measuring a chromatic dispersion of an optical fiber has a light signal transmitter and a light signal receiver. The transmitter has a modulation signal generating circuit for generating at least one modulation signal having a predetermined frequency, and synchronizing signal generating circuit for generating a synchronizing signal having a predetermined frequency. First adding circuit is provided for adding the synchronizing signal generated by the synchronizing signal generating circuit to the modulation signal generated by the modulation signal generatig circuit. The light signal receiver has first photoelectric converter for converting the reference optical signal into a reference electrical signal added with the synchronizing signal and second photoelectric converter for converting the measurement optical signal into a measurement electrical signal added with the synchronizing signal. The receiver also has a synchronizing signal regenerating circuit for generating a regenerated synchronizing signal at a predetermined timing, and local signal generating circuit for generating at least one local signal having a predetermined frequency. Second adding circuit is provided for adding the regenerated synchronizing signal to the local signal from the local signal generating circuit. Further, a timing signal obtaining circuit is provided for separating the synchronizing signal from the reference electrical signal added with the synchronizing signal from the first photoelectric converter to obtain a timing signal serving as the synchronizing signal, in order to provide the predetermined timing to the synchronizing signal regenerating means.

10. 发明授权

US08160458B2 Optical phase-modulation evaluating device 有权
标题翻译：光相位调制评估装置
公开(公告)号：US08160458B2
公开(公告)日：2012-04-17
申请号：US12523150
申请日：2008-01-10
申请人： Takao Tanimoto , Koji Kawakita
发明人： Takao Tanimoto , Koji Kawakita
IPC分类号： H04L27/22 , H04B10/06
CPC分类号： G02B26/06 , G01J9/02 , G02B26/0875
摘要： The present invention provides an optical phase modulation evaluating device that can measure and evaluate the precise degree of modulation in phase of an optical phase modulation signal in comparison with the conventionally-known optical phase modulation evaluating device. The optical phase modulation evaluating module includes: a bit delay device located on optical paths of the third and fifth light beams, and adapted to change the length of the optical paths to delay the third and fifth light beams by one bit per second; and an optical phase difference setting means for delaying either or both the ninth and tenth light beams by a designated phase angle which is not equal to zero, the optical phase difference setting means having a light transmissive plate located on an optical path for the ninth light beam, and a light transmissive plate located on an optical path for the tenth light beam.
摘要翻译：本发明提供了一种光学相位调制评估装置，其与常规已知的光相位调制评估装置相比能够测量和评估光相位调制信号的相位的精确调制度。光相位调制评估模块包括：位延迟装置，位于第三和第五光束的光路上，并且适于改变光路的长度以将第三和第五光束延迟一位每秒; 以及光学相位差设定装置，用于将第九和第十光束中的任一者或第二光束延迟不等于零的指定相位角，光学相位差设定装置具有位于第九光线的光路上的透光板光束，以及位于第十光束的光路上的透光板。

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