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1. 发明授权

US5125053A Optical coupler ultizing prisms 失效
标题翻译：光耦合器超载优先
公开(公告)号：US5125053A
公开(公告)日：1992-06-23
申请号：US662736
申请日：1991-03-01
申请人： Kenichi Abe , Norihisa Naganuma , Hisashi Takamatsu
发明人： Kenichi Abe , Norihisa Naganuma , Hisashi Takamatsu
IPC分类号： G02B6/28 , G02B6/34 , G02B6/42 , H01S3/094
CPC分类号： H01S3/094003 , G02B6/2817 , G02B6/4209 , H01S3/094019 , H01S3/09408
摘要： An optical coupler is disclosed which couples a signal beam and a pumping beam having proximate wavelengths to each other. The optical coupler includes a first prism having an included angle of 45 degrees, and a triangular prism having an apex angle of 22.5 degrees and adhered to a face of the first prism on which an optical wavelength multiplexing film is formed. The signal beam and the pumping beam multiplexed by the optical coupled is introduced into an Er doped fiber, in which the signal beam is amplified directly.

2. 发明授权

US5015055A Polarization coupler 失效
标题翻译：极化耦合器
公开(公告)号：US5015055A
公开(公告)日：1991-05-14
申请号：US539220
申请日：1990-06-18
申请人： Hisashi Takamatsu , Norihisa Naganuma , Kenichi Abe
发明人： Hisashi Takamatsu , Norihisa Naganuma , Kenichi Abe
IPC分类号： G02B6/26 , G02B6/287 , G02B6/34 , G02B6/42
CPC分类号： G02B6/2746 , G02B6/274 , G02B6/29332 , G02B6/4246
摘要： A polarization coupler in which a polarization maintaining fiber is employed and a process of producing such polarization coupler are disclosed. Where the polarization coupler is used, beams of light from two laser diodes can be introduced into a single optical fiber and light for the monitoring can be split from a main signal output. Since minimum components required to realize the function are a rotator, a birefringent plate and two or three polarization maintaining fibers, the polarization coupler is superior in operability in production and is suitable for miniaturization. The branching ratio of light for monitoring can be adjusted by adjustment of the angle of rotation of light by the rotator.

3. 发明授权

US5223975A Polarization beam coupler including a splitter for producing an output monitor beam 失效
标题翻译：偏振光束耦合器，包括用于产生输出监视器的分光器
公开(公告)号：US5223975A
公开(公告)日：1993-06-29
申请号：US431240
申请日：1989-11-03
申请人： Norihisa Naganuma , Hisashi Takamatsu , Kenichi Abe
发明人： Norihisa Naganuma , Hisashi Takamatsu , Kenichi Abe
IPC分类号： G02B27/28
CPC分类号： G02B27/283 , G02B6/2713 , G02B6/2773
摘要： A polarization beam coupler adapted to produce an output light beam for monitoring is disclosed. The polarization beam coupler includes a polarization beam coupling cube for coupling two incident light beams having polarization planes perpendicular to each other and projecting the coupled light beams on the same optic axis, a beam splitting cube having a beam splitting film formed from a dielectric multi-layer or single-layer film for extracting a monitor beam, and a quarter-wave plate interposed between the polarization beam coupling cube and the beam splitting cube such that incident light beams to the beam splitting cube may be circularly polarized light. Due to the construction, the output level of a monitor light beam can be prevented from depending upon the polarization planes of the incident light.

4. 发明申请

US20050249452A1 Optical switch device 失效
标题翻译：光开关器件
公开(公告)号：US20050249452A1
公开(公告)日：2005-11-10
申请号：US11180526
申请日：2005-07-14
申请人： Shinji Maruyama , Norihisa Naganuma
发明人： Shinji Maruyama , Norihisa Naganuma
IPC分类号： G02B6/34 , G02B6/12
CPC分类号： G02B6/12019 , G02B6/29328
摘要： In an optical switch device: output waveguides are arranged with such a pitch as to realize a split wavelength gap equal to or smaller than half of a gap between operating wavelengths of optical signals; at least two input waveguides are arranged with the same pitch; at least one slab waveguide spreads light from the input waveguides to be outputted to a grating element, condenses first light from the grating element to be outputted into the input waveguides, condenses second light from the grating element for each wavelength to be outputted into the output waveguides, and spreads light from the output waveguides to be outputted to the grating element; and the optical switch unit selects signals at an identical wavelength in adjacent output waveguides, and performs 2×2 switching of the signals so as to output the signals from the input waveguides.
摘要翻译：在光开关装置中：输出波导以这样的间距排列，以实现等于或小于光信号工作波长之间的间隙的一半的分离波长间隙; 至少两个输入波导以相同的间距排列; 至少一个平板波导将来自输入波导的光展开以输出到光栅元件，将来自光栅元件的第一光凝结输出到输入波导中，将来自光栅元件的第二光从每个波长聚光以输出到输出波导，并且从输出波导扩散光以输出到光栅元件; 并且光学开关单元选择相邻输出波导中相同波长的信号，并且执行信号的2×2切换，以输出来自输入波导的信号。

5. 发明授权

US06650797B2 Wavelength characteristics control device, gain equalizer and light amplifier 失效
标题翻译：波长特性控制装置，增益均衡器和光放大器
公开(公告)号：US06650797B2
公开(公告)日：2003-11-18
申请号：US10068941
申请日：2002-02-11
申请人： Norihisa Naganuma
发明人： Norihisa Naganuma
IPC分类号： G02B600
CPC分类号： G02B6/29395 , G02B6/2713 , G02B6/272 , G02B6/2766 , G02B6/2773 , G02B6/29302 , G02B6/2934 , G02B6/29361 , G02B6/4246 , H04B10/2941
摘要： A wavelength characteristic control device capable of variably controlling a wavelength characteristic in a satisfactory manner. A polarized light wavelength characteristic changing element has a wavelength characteristic such that the transmittances or reflectances of P- and S-polarized rays vary differently with respect to wavelength. Polarization variable control means subjects the plane of polarization of the polarized light incident on the polarized light wavelength characteristic changing element to rotatory control to change the ratio of the P-polarized ray to the S-polarized ray, thereby variably controlling the wavelength characteristic.
摘要翻译：一种能够以令人满意的方式可变地控制波长特性的波长特性控制装置。偏振光波长特性变化元件具有使得P和S偏振光的透射率或反射率相对于波长不同变化的波长特性。极化可变控制装置使入射到偏振光波长特性变化元件上的偏振光的偏振面受到旋转控制，以改变P偏振光线与S偏振光线的比例，从而可变地控制波长特性。

6. 发明授权

US06496619B2 Method for gain equalization, and device and system for use in carrying out the method 失效
标题翻译：增益均衡方法，以及用于执行该方法的装置和系统
公开(公告)号：US06496619B2
公开(公告)日：2002-12-17
申请号：US09356049
申请日：1999-07-16
申请人： Norihisa Naganuma
发明人： Norihisa Naganuma
IPC分类号： G02B626
CPC分类号： G02B6/4215 , G02B6/29391 , H04B10/2941
摘要： A method for gain equalization. In this method, an optical transmission line including an optical amplifier for giving a gain to WDM (wavelength division multiplexed) signal light is first provided. Gain equalization is next performed on the optical transmission line so as to obtain a gain changing substantially monotonously with respect to wavelength. Gain equalization is further performed on the optical transmission line so as to obtain a gain substantially fixed with respect to wavelength. A wavelength characteristic of gain changing monotonously can be easily gain-equalized by an active gain equalizer having a simple configuration. Accordingly, even when the optical amplifier has a nonmonotonous wavelength characteristic of gain, a gain tilt in the optical amplifier can be easily flattened.
摘要翻译：一种增益均衡的方法。在该方法中，首先提供包括用于对WDM（波分复用）信号光进行增益的光放大器的光传输线。接着在光传输线上执行增益均衡，以获得相对于波长基本单调变化的增益。在光传输线上进一步进行增益均衡，以获得相对于波长基本固定的增益。可以通过具有简单配置的有源增益均衡器容易地增益增益增益单调变化的波长特性。因此，即使当光放大器具有增益的非单调波长特性时，光放大器中的增益倾斜也容易变平。

7. 发明授权

US06829396B2 Wavelength characteristic control device, gain equalizer, and light amplifier 失效
标题翻译：波长特性控制装置，增益均衡器和光放大器
公开(公告)号：US06829396B2
公开(公告)日：2004-12-07
申请号：US10612959
申请日：2003-07-07
申请人： Norihisa Naganuma
发明人： Norihisa Naganuma
IPC分类号： G02B600
CPC分类号： G02B6/29395 , G02B6/2713 , G02B6/272 , G02B6/2766 , G02B6/2773 , G02B6/29302 , G02B6/2934 , G02B6/29361 , G02B6/4246 , H04B10/2941
摘要： A wavelength characteristic control device capable of variably controlling a wavelength characteristic in a satisfactory manner. A polarized light wavelength characteristic changing element has a wavelength characteristic such that the transmittances or reflectances of P- and S-polarized rays vary differently with respect to wavelength. Polarization variable control means subjects the plane of polarization of the polarized light incident on the polarized light wavelength characteristic changing element to rotatory control to change the ratio of the P-polarized ray to the S-polarized ray, thereby variably controlling the wavelength characteristic.
摘要翻译：一种能够以令人满意的方式可变地控制波长特性的波长特性控制装置。偏振光波长特性变化元件具有使得P和S偏振光的透射率或反射率相对于波长不同变化的波长特性。极化可变控制装置使入射到偏振光波长特性变化元件上的偏振光的偏振面受到旋转控制，以改变P偏振光线与S偏振光线的比例，从而可变地控制波长特性。

8. 发明授权

US06370285B1 Wavelength characteristic control device, gain equalizer, and light amplifier 有权
公开(公告)号：US06370285B1
公开(公告)日：2002-04-09
申请号：US09187748
申请日：1998-11-09
申请人： Norihisa Naganuma
发明人： Norihisa Naganuma
IPC分类号： G02B600
CPC分类号： G02B6/29395 , G02B6/2713 , G02B6/272 , G02B6/2766 , G02B6/2773 , G02B6/29302 , G02B6/2934 , G02B6/29361 , G02B6/4246 , H04B10/2941
摘要： A wavelength characteristic control device capable of variably controlling a wavelength characteristic in a satisfactory manner. A polarized light wavelength characteristic changing element has a wavelength characteristic such that the transmittances or reflectances of P- and S-polarized rays vary differently with respect to wavelength. Polarization variable control means subjects the plane of polarization of the polarized light incident on the polarized light wavelength characteristic changing element to rotatory control to change the ratio of the P-polarized ray to the S-polarized ray, thereby variably controlling the wavelength characteristic.

9. 发明授权

US5812307A Optical device and optical amplifier 失效
标题翻译：光器件和光放大器
公开(公告)号：US5812307A
公开(公告)日：1998-09-22
申请号：US851705
申请日：1997-05-06
申请人： Norihisa Naganuma
发明人： Norihisa Naganuma
IPC分类号： G02B6/26 , G02B6/293 , G02B6/34 , G02B6/42 , H01S3/06 , H01S3/067 , H01S3/10 , H04B10/00 , H04B10/25 , G02B27/14
CPC分类号： G02B6/29362 , G02B6/4246
摘要： An optical device consists of integrated parts and is used for an optical amplifier. The optical device has first to third assemblies. The first assembly includes two optical fibers each for transmitting a beam and a lens for receiving the beams and providing collimated beams oriented in different directions at given angles. The second assembly includes an optical fiber and a lens to receive one of the collimated beams. The third assembly includes an optical fiber and a lens to receive the other collimated beam. At least one of the second and third assemblies has a second optical fiber. An optical film is arranged in front of the lens of the assembly having the second optical fiber. The optical film reflects an optical signal whose wavelength is different from that of the collimated beam. The two optical fibers of the assembly having the second optical fiber are coupled together through the lens and optical film, to pass the optical signal between the two optical fibers.
摘要翻译：光学装置由集成部件组成，用于光放大器。光学装置具有第一至第三组件。第一组件包括两个光纤，每个用于传输光束和用于接收光束的透镜，并且以给定角度提供以不同方向定向的准直光束。第二组件包括光纤和用于接收准直束之一的透镜。第三组件包括光纤和用于接收另一准直光束的透镜。第二和第三组件中的至少一个具有第二光纤。光学膜布置在具有第二光纤的组件的透镜的前面。光学膜反射出波长不同于准直光束的光信号。具有第二光纤的组件的两根光纤通过透镜和光学膜耦合在一起，以将光信号传递到两根光纤之间。

10. 发明授权

US5801892A Optical device having an optical film with an incident angle thereupon variable 失效
标题翻译：具有入射角度的光学膜的光学装置可变
公开(公告)号：US5801892A
公开(公告)日：1998-09-01
申请号：US674515
申请日：1996-07-02
申请人： Norihisa Naganuma , Nobuhiro Fukushima
发明人： Norihisa Naganuma , Nobuhiro Fukushima
IPC分类号： G02B6/26 , G02B5/28 , G02B6/32 , G02B6/34 , G02B6/38 , G02B6/42 , G02B7/00 , G02B26/08 , G02B5/22
CPC分类号： G02B6/29362 , G02B6/2937 , G02B6/29395 , G02B6/4246 , G02B7/004 , G02B6/3845
摘要： An optical device having a collimating mechanism for converting light emitted from an excitation port into a parallel beam and outputting the parallel beam onto an optical path, an optical film provided so as to pass the parallel beam output from the collimating mechanism, and a supporting mechanism for supporting the optical film so that the optical film is rotatable about an axis inclined with respect to the optical path. The optical film is inclined with respect to a plane perpendicular to the axis. An incident angle of the parallel beam upon the optical film can be changed by rotating the optical film about the axis. Thus, the optical device having the optical film that can vary the incident angle thereupon can be provided with a simple structure.
摘要翻译：一种具有准直机构的光学装置，用于将从激励端射出的光转换为平行光，并将平行光束输出到光路上;光学膜，其设置成使从准直机构输出的平行光束通过，用于支撑光学膜，使得光学膜可以围绕相对于光路倾斜的轴线旋转。光学膜相对于垂直于轴的平面倾斜。可以通过围绕轴线旋转光学膜来改变平行光束在光学膜上的入射角度。因此，可以提供具有能够改变入射角的光学膜的光学装置，其结构简单。

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