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1. 发明授权

US06952309B1 Optical amplifier and optical amplification method 失效
标题翻译：光放大器和光放大法
公开(公告)号：US06952309B1
公开(公告)日：2005-10-04
申请号：US09667576
申请日：2000-09-22
申请人： Tetsufumi Tsuzaki , Masayuki Nishimura , Masayuki Shigematsu , Hitoshi Hatayama , Eisuke Sasaoka
发明人： Tetsufumi Tsuzaki , Masayuki Nishimura , Masayuki Shigematsu , Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02F1/01 , G02F1/313 , H01S3/00 , H01S3/067 , H01S3/10 , H01S3/13
CPC分类号： H01S3/06758 , H01S3/06754 , H01S3/10007 , H01S3/10023 , H01S3/1301 , H01S2301/04 , H04B10/2941 , H04B10/2942 , H04B10/296
摘要： A optical filter has a loss spectrum whose gradient dL/dλ of a loss L (dB) with respect to the wavelength λ (nm) is variable in the wavelength band of multiplexed signal light. A control circuit detects each power of signal light components demultiplexed by an optical coupler and controls the power of optical pumping light to be supplied to an optical amplification section from an optical pumping light sources such that the power of output signal light has a predetermined target value. The control circuit also controls the gradient dL/dλ of the optical filter on the basis of powers of the signal light components.
摘要翻译：滤光器具有损耗谱，其相对于波长λ（nm）的损耗L（dB）的梯度dL /dlλ在复用信号光的波长带中是可变的。控制电路检测由光耦合器解复用的信号光分量的每个功率，并且控制从光泵浦光源提供给光放大部分的光泵浦光的功率，使得输出信号光的功率具有预定的目标值。控制电路还基于信号光分量的功率来控制滤光器的梯度dL / dl。

2. 发明授权

US06169837A Dispersion-flattened optical fiber 有权
标题翻译：色散扁平光纤
公开(公告)号：US06169837A
公开(公告)日：2001-01-02
申请号：US09341310
申请日：1999-07-08
申请人： Takatoshi Kato , Hitoshi Hatayama , Eisuke Sasaoka , Masayuki Nishimura
发明人： Takatoshi Kato , Hitoshi Hatayama , Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02233 , G02B6/02242 , G02B6/03611 , G02B6/03627 , G02B6/03644 , G02B6/03666
摘要： The present invention aims at providing a dispersion-flattened optical fiber which is suitable for wavelength-division multiplexing soliton transmission utilizing an optical amplifier and the like and has a structure for effectively restraining nonlinear optical phenomena from occurring. The dispersion-flattened optical fiber according to the present invention has, as characteristics at a wavelength of 1550 nm, a dispersion with an absolute value of 5 ps/nm/km or less, an effective cross-sectional area of 45 &mgr;n 2 or more, a dispersion slope of 0.03 ps/nm2/km or less, and a cutoff wavelength of 1.0 &mgr;m or more at a length of 2 m.
摘要翻译：本发明的目的在于提供一种适用于利用光放大器等进行波分复用孤子传输的色散平坦光纤，具有有效抑制非线性光学现象发生的结构。本发明的色散平坦化光纤作为1550nm波长的特性，具有绝对值为5ps / nm / km以下的色散，有效截面积为45mb 2以上，0.03ps / nm 2 / km以下的色散斜率，2μm长度的截止波长为1.0μm以上。

3. 发明授权

US06333807B1 Optical filter 失效
标题翻译：滤光片
公开(公告)号：US06333807B1
公开(公告)日：2001-12-25
申请号：US09626450
申请日：2000-07-26
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02F133
CPC分类号： H04B10/2941 , G02F1/0147 , G02F1/225 , G02F1/3136 , G02F2001/212 , G02F2001/311 , H01S3/06754 , H01S3/1301 , H01S2301/04 , H04B10/25073 , H04B10/296 , H04B2210/003 , H04J14/0221
摘要： The present invention relates to an optical filter comprising a simple structure which easily realizes slope control of loss spectrum in a signal wavelength band as a gain equalizer. The optical filter comprises a first Mach-Zehnder interferometer constituted by a first part of a main optical line, a first auxiliary optical line, and first and second optical couplers which optically couple the main optical line and first auxiliary optical line to each other. The optical filter further comprises a second Mach-Zehnder interferometer constituted by a second part of the main optical line, a second auxiliary optical line, and third and fourth optical couplers which optically couple the main optical line and second auxiliary optical line to each other. In particular, in order for the slope of loss spectrum in a signal wavelength band to be adjustable while being centered about the amount of loss of light at a reference wavelength propagating through the main optical line from its entrance end to exit end, at least one of the first part of main optical line and the first auxiliary optical line is provided with a first temperature regulating device, at least one of the second part of main optical line and the second auxiliary optical line is provided with a second temperature regulating device, and the first and second temperature regulating devices are controlled by a control system.
摘要翻译：本发明涉及一种滤光器，其包括简单的结构，其容易地实现信号波长带中的损耗谱的斜率控制作为增益均衡器。光学滤波器包括由主光线的第一部分，第一辅助光线以及将主光线和第一辅助光线相互光耦合的第一和第二光耦合器构成的第一马赫 - 曾德干涉仪。滤光器还包括由主光线的第二部分，第二辅助光线构成的第二马赫 - 曾德干涉仪，以及将主光线和第二辅助光线相互光耦合的第三和第四光耦合器。特别地，为了将信号波长带中的损耗谱的斜率调整为以从入射端到出射端传播通过主光线的参考波长的光损失量为中心，至少一个主光路的第一部分和第一辅助光线设置有第一温度调节装置，主光线和第二辅助光线的第二部分中的至少一个设置有第二温度调节装置，并且第一和第二温度调节装置由控制系统控制。

4. 发明授权

US06332055B1 Optical attenuator, plane waveguide type optical circuit having the same and optical attenuation system having the same 失效
标题翻译：光衰减器，平面波导型光电路具有相同的光衰减系统
公开(公告)号：US06332055B1
公开(公告)日：2001-12-18
申请号：US09517521
申请日：2000-03-02
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02B626
CPC分类号： G02B6/12019 , G02B6/12004 , G02B6/12026 , G02B6/122 , G02B2006/12147 , G02F1/0121 , G02F1/0147 , G02F1/225 , G02F2201/58 , G02F2203/48
摘要： The present invention relates to an optical attenuator or the like which is easy to manufacture and is able to be miniaturized. In an optical attenuator according to this invention, a plurality of Mach-Zehnder-type waveguide elements are arranged in parallel on the common substrate. Each Mach-Zehnder-type waveguide element is provided with an input optical waveguide, a first directional coupler, two optical waveguides, a second directional coupler, an output optical waveguide, a monitoring optical waveguide and a temperature regulator for regulating the temperature of one of the two optical waveguides. Particularly, between the Mach-Zehnder-type waveguide elements adjacent to each other, an monitoring optical waveguide of one thereof and an output optical waveguide of the other thereof are arranged to cross.
摘要翻译：本发明涉及容易制造且能够小型化的光衰减器等。在根据本发明的光衰减器中，多个马赫 - 曾德尔型波导元件平行布置在公共基板上。每个马赫 - 策德尔型波导元件设置有输入光波导，第一定向耦合器，两个光波导，第二定向耦合器，输出光波导，监控光波导和用于调节温度的温度调节器两个光波导。特别地，在彼此相邻的马赫 - 策德尔型波导元件之间，其一个的监视光波导和另一个的监视光波导被布置成交叉。

5. 发明申请

US20060257085A1 Fiberoptics, fiberoptic transmission line and optical transmission system 审中-公开
标题翻译：光纤，光纤传输线和光传输系统
公开(公告)号：US20060257085A1
公开(公告)日：2006-11-16
申请号：US10558630
申请日：2004-07-09
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02B6/02
CPC分类号： H04B10/2563 , G02B6/02009 , G02B6/02223 , G02B6/02242 , G02B6/02257 , G02B6/02271 , G02B6/03644 , G02B6/29377
摘要： The present invention provides an optical transmission system and so on having a structure that enables to reduce variations between wavelengths in chromatic dispersion over a wide wavelength range and control non-linear optical effects. An optical fiber transmission line comprises a first optical fiber having a positive chromatic dispersion such that its wavelength dependence is reduced over a wide wavelength range, and a second optical fiber having a negative chromatic dispersion such that its wavelength dependence is reduced over the wavelength range. In this way, the first and second optical fibers each have a chromatic dispersion of a different polarity, thereby controlling accumulated chromatic dispersions at low level for a whole optical fiber transmission line, while the chromatic dispersion occurs to some extent in each of the first and second optical fibers, thereby controlling effectively non-linear optical effects such as four-wave mixing.
摘要翻译：本发明提供了一种光传输系统等，其具有能够减小宽波长范围内的色散波长之间的变化并且控制非线性光学效果的结构。光纤传输线包括具有正色散的第一光纤，使得其波长依赖性在宽波长范围内减小，并且具有负色散的第二光纤，使得其波长依赖性在波长范围内减小。以这种方式，第一和第二光纤各自具有不同极性的色散，从而将整个光纤传输线的累积色散控制在低电平，同时在一定程度上在第一和第第二光纤，从而有效地控制诸如四波混频的非线性光学效应。

6. 发明授权

US06701090B1 Wavelength division multiplexing signal number monitoring apparatus and method 失效
标题翻译：波分复用信号号码监控装置及方法
公开(公告)号：US06701090B1
公开(公告)日：2004-03-02
申请号：US09626158
申请日：2000-07-26
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： H04J1402
CPC分类号： H04B10/077 , G02B6/12019 , H04B10/07955 , H04J14/02
摘要： Wavelength division multiplexing signal light is fed into an arrayed diffraction grating type optical demultiplexer, demultiplexed signal light components are outputted from a plurality of output ports, whether there is a signal light component or not is detected by each photodiode of a photodiode array, and a counter unit calculates the number of signals from the result of detection. Here, the output wavelength interval of &Dgr;&lgr;o of the output ports is set to &Dgr;&lgr;o=&Dgr;&lgr;i/m (where m is an integer of at least two) with respect to the signal wavelength interval &Dgr;&lgr;i of the wavelength division multiplexing signal light, whereas the photodiode array is sectioned into m photodiode array groups in which the output signal wavelength interval is &Dgr;&lgr;i.
摘要翻译：波分复用信号光被馈送到阵列衍射光栅型光解复用器中，从多个输出端口输出解复用的信号光分量，无论是否由光电二极管阵列的每个光电二极管检测到信号光分量，以及计数器单元根据检测结果计算信号数。这里，输出端口的Deltalambdao的输出波长间隔相对于波分复用信号光的信号波长间隔Deltalambdai被设置为Deltalambdao = Deltalambdai / m（其中m是至少为2的整数），而光电二极管阵列分为m个光电二极管阵列组，其中输出信号波长间隔为Deltalambdai。

7. 发明授权

US06269211B1 Optical plane waveguide 有权
标题翻译：光学平面波导
公开(公告)号：US06269211B1
公开(公告)日：2001-07-31
申请号：US09518132
申请日：2000-03-03
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02B610
CPC分类号： G02B6/1228 , G02B6/305
摘要： The present invention relates to an optical plane waveguide capable of reducing the coupling loss with respect to an optical fiber and achieving downsizing and higher integration. The optical plane waveguide according to the present invention comprises a core region provided in a substrate, and one or more side core regions provided along the tip portion of the core region. The core region and the side core regions have a higher refractive index than the substrate. Moreover, end faces of the core region and the side core regions coincide with the end face of the substrate and function as a light input/output port for signal light. In particular, since the side core regions are provided along the core region and positioned at a peripheral portion of the substrate where the end face of the substrate is included. According to the configuration, the mode field diameter of signal light can be enlarged at least in a direction parallel to a surface of the substrate with a single mode condition satisfied, whereby the coupling loss with respect to the optical fiber can be reduced.
摘要翻译：本发明涉及能够减少相对于光纤的耦合损耗并实现小型化和更高集成度的光学平面波导。根据本发明的光学平面波导包括设置在基板中的芯区域和沿芯区域的尖端部分设置的一个或多个侧芯区域。芯区域和侧芯区域具有比衬底更高的折射率。此外，芯区域和侧芯区域的端面与衬底的端面重合，并且用作用于信号光的光输入/输出端口。特别地，由于侧芯区域沿着核心区域设置并且位于包括衬底的端面的衬底的周边部分。根据该结构，在满足单模状态的情况下，信号光的模场直径可以至少在平行于基板的表面的方向上扩大，从而能够降低相对于光纤的耦合损耗。

8. 发明授权

US07027215B2 Optical component, optical amplification module, and optical transmission system 失效
标题翻译：光学元件，光放大模块和光传输系统
公开(公告)号：US07027215B2
公开(公告)日：2006-04-11
申请号：US10654987
申请日：2003-09-05
申请人： Hitoshi Hatayama , Motoki Kakui , Tatsuhiko Shitomi , Masayuki Shigematsu
发明人： Hitoshi Hatayama , Motoki Kakui , Tatsuhiko Shitomi , Masayuki Shigematsu
IPC分类号： H01S3/00 , G02B6/26
CPC分类号： H04B10/2941 , G02F1/0147 , G02F1/225 , H04B2210/003
摘要： The present invention relates to an optical component and others in structure capable of implementing improved compensation for a gain slope. The optical component is equipped with first and second Mach-Zehnder interferometers. The first Mach-Zehnder interferometer is provided with a first temperature controller for controlling a temperature of at least one of a part of an optical main path and a first optical side path, while the second Mach-Zehnder interferometer 42 is also provided with a second temperature controller for controlling a temperature of at least one of a part of the optical main path and a second optical side path. A filter circuit having a wavelength-dependent insertion loss is disposed between the first and second Mach-Zehnder interferometers, and a controller controls the temperatures of the optical paths by use of the first and second temperature controllers on the basis of the insertion loss of the filter circuit, thereby setting a loss for light of a predetermined wavelength propagating between a light input end and a light output end.
摘要翻译：本发明涉及能够对增益斜率进行改进补偿的结构的光学部件等。光学元件配备有第一和第二马赫 - 曾德尔干涉仪。第一马赫 - 策德尔干涉仪设置有用于控制光学主路径的一部分和第一光学侧路径中的至少一个的温度的第一温度控制器，而第二马赫 - 策德尔干涉仪42还设置有第二温度控制器，用于控制光学主路径的一部分和第二光学侧路径中的至少一个的温度。具有波长依赖性插入损耗的滤波器电路设置在第一和第二马赫 - 策德尔干涉仪之间，并且控制器基于第一和第二温度控制器的插入损耗来控制光路的温度滤光器电路，从而设定在光输入端和光输出端之间传播的预定波长的光的损耗。

9. 发明授权

US06782168B2 Apparatus for and method of monitoring wavelength multiplexed signal light as well as optical transmission system using the same 失效
标题翻译：用于监测波长复用信号光的装置和方法以及使用其的光传输系统
公开(公告)号：US06782168B2
公开(公告)日：2004-08-24
申请号：US10175381
申请日：2002-06-20
申请人： Hitoshi Hatayama , Chisai Hirose , Masayuki Nishimura
发明人： Hitoshi Hatayama , Chisai Hirose , Masayuki Nishimura
IPC分类号： G02B626
CPC分类号： H04J14/02 , G02B6/12004 , G02B6/29352 , G02B6/29385 , G02B6/29395 , G02B6/29398 , G02B6/4215 , H04B10/077 , H04B10/07955
摘要： The invention provides an apparatus for and method of monitoring wavelength multiplexed signal light, which can obtain monitored data for multi-channel optical signals contained in the wavelength multiplexed signal light, which can avoid a large size and complicated structure and high cost of monitoring apparatus, and which can easily monitor the wavelength multiplexed signal light. The invention also provides an optical transmission system employing the monitoring apparatus and method. An optical filter being able to control a loss pattern is disposed on a monitoring waveguide for the wavelength multiplexed signal light, which is branched for monitoring from an input waveguide and an output waveguide constituting a main optical transmission path in a wavelength multiplexed signal light monitoring apparatus. While the optical filter sets a plurality of loss patterns in sequence, the wavelength multiplexed signal light having passed through the optical filter is detected by a photodiode for each of the loss patterns, and monitored data of the wavelength multiplexed signal light can be obtained from detected data.
摘要翻译：本发明提供了一种监测波长多路复用信号光的装置和方法，可以获得波长复用信号光中包含的多通道光信号的监测数据，避免了尺寸大，结构复杂，成本高的监控装置，并且可以容易地监视波长复用信号光。本发明还提供一种采用监测装置和方法的光传输系统。能够控制损耗图案的滤光器设置在用于波长多路复用信号光的监视波导上，该波长复用信号光在波长多路复用信号光监视装置中从构成主光传输路径的输入波导和输出波导进行监视分支。虽然光学滤波器依次设置多个损耗模式，但是通过光电二极管检测通过滤光器的波长多路复用信号光，并且可以通过检测到的波长复用信号光的监视数据数据。

10. 发明授权

US06633698B2 Optical filter 失效
标题翻译：滤光片
公开(公告)号：US06633698B2
公开(公告)日：2003-10-14
申请号：US09840929
申请日：2001-04-25
申请人： Hitoshi Hatayama , Masayuki Nishimura
发明人： Hitoshi Hatayama , Masayuki Nishimura
IPC分类号： G02B626
CPC分类号： G02F1/225 , G02F1/0147 , G02F2001/311 , G02F2201/14
摘要： A main optical path disposed between light input and output ends and an auxiliary optical path disposed so as to correspond to the main optical path are optically coupled to each other with first, second, and third optical couplers. The respective optical path lengths of main and auxiliary optical paths differ from each other between the first and second optical couplers and between the second and third optical couplers. Between the first and second optical couplers and between the second and third optical couplers, at least one of the main and auxiliary optical paths is provided with temperature adjusting means for adjusting the temperature of the corresponding optical path.
摘要翻译：设置在光输入和输出端之间的主光路和设置成对应于主光路的辅助光路通过第一，第二和第三光耦合器彼此光耦合。主光路和辅助光路各自的光路长度在第一和第二光耦合器之间以及第二和第三光耦合器之间彼此不同。在第一和第二光耦合器之间以及第二和第三光耦合器之间，主光路和辅助光路中的至少一个光路设置有用于调节相应光路温度的温度调节装置。

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