公开(公告)号：US6157025A

公开(公告)日：2000-12-05

申请号：US174724

申请日：1998-10-19

申请人： Yoshitada Katagiri ,  Yoshiaki Tachikawa ,  Shinji Nagaoka ,  Fumikazu Ohira ,  Kazuo Aida ,  Ken-ichi Suzuki ,  Hiroshi Abe ,  Shingo Kawai ,  Hitoshi Obara

发明人： Yoshitada Katagiri ,  Yoshiaki Tachikawa ,  Shinji Nagaoka ,  Fumikazu Ohira ,  Kazuo Aida ,  Ken-ichi Suzuki ,  Hiroshi Abe ,  Shingo Kawai ,  Hitoshi Obara

IPC分类号： G02B6/34 ,  G02B7/00 ,  G02B26/00 ,  G02B27/44 ,  H01J40/14

CPC分类号： G02B6/4246 ,  G02B26/008 ,  G02B27/4244 ,  G02B6/29361 ,  G02B6/29395 ,  G02B5/20 ,  G02B6/2937 ,  G02B7/006

摘要： A disk shaped tunable optical filter is formed by a transparent substrate in a disk shape, and a filter layer formed on a top surface of the substrate, having such a filter characteristic that a transmission central wavelength varies along a circumferential direction as a monotonic function of a viewing angle. This disk shaped tunable optical filter can be advatageously utilized in realizing a wavelength discrimination apparatus, a reference wavelength light generation apparatus, an optical packet generation apparatus, and a tunable optical filter module, which are also disclosed.

摘要翻译： 盘状可调谐滤光器由盘状的透明基板和形成在基板的顶面上的滤光层形成，该滤光片具有透光中心波长沿圆周方向变化的滤光器特性，作为单调功能 视角。 这种盘形可调光滤波器可以被广泛地用于实现波长鉴别装置，参考波长发光装置，光分组产生装置和可调光滤波器模块。

公开(公告)号：US5414548A

公开(公告)日：1995-05-09

申请号：US127879

申请日：1993-09-28

申请人： Yoshiaki Tachikawa ,  Masao Kawachi ,  Hiroshi Takahashi ,  Kyo Inoue

发明人： Yoshiaki Tachikawa ,  Masao Kawachi ,  Hiroshi Takahashi ,  Kyo Inoue

IPC分类号： G02B6/28 ,  G02B6/34 ,  H01S5/026 ,  H01S5/10 ,  G02B6/26 ,  H04J14/00

CPC分类号： G02B6/12014 ,  G02B6/12016 ,  G02B6/12019 ,  G02B6/12021 ,  G02B6/278 ,  G02B6/2861 ,  G02B6/29361 ,  G02B6/2938 ,  G02B6/29395 ,  G02B6/4215 ,  H01S5/026 ,  H01S5/0268 ,  H01S5/1071 ,  H04B2210/258

摘要： An optical device is presented which is useful for optical signal transmission and switching systems by multiplexing and demultiplexing optical signals in looped optical paths, consisting of a plurality of individual loop-back optical paths. The device is essentially a multi/demultiplexer having an arrayed waveguide grating disposed between a plurality of input sections and output sections which are joined by the plurality of individual loop-back optical paths. Because the modulated signals are looped back into the same optical paths using the same devices, problems of mismatching performance introduced by using different optical devices are avoided. The device processes individual optical signals of different wavelengths, minimizes splitting losses, and reduces noise components by producing narrow bandpass signals of high signal to noise ratio. Optical signal splitting and insertion, delay line memory and delay equalization circuits can all be handled by the same circuit configuration. The device is simple in construction, reliable in performance and economical in production.

摘要翻译： 提出了一种光学装置，其通过在由多个单独的环回光路组成的环路光路中进行复用和解复用光信号而对光信号传输和切换系统是有用的。 该装置本质上是具有布置在由多个单独的环回光路连接的多个输入部分和输出部分之间的阵列波导光栅的多/多路分解器。 由于调制信号使用相同的器件环回到相同的光路径中，所以避免了使用不同光学器件引入的不匹配性能的问题。 该器件处理不同波长的各个光信号，最大限度地减少分裂损耗，并通过产生高信噪比的窄带通信号来降低噪声分量。 光信号分离和插入，延迟线存储器和延迟均衡电路都可以通过相同的电路配置来处理。 该设备结构简单，性能可靠，生产经济。

公开(公告)号：US5905823A

公开(公告)日：1999-05-18

申请号：US810321

申请日：1997-02-28

申请人： Toshihiro Shintaku ,  Yujiro Katoh ,  Yoshiaki Tachikawa ,  Naoto Sugimoto ,  Haruki Kozawaguchi

发明人： Toshihiro Shintaku ,  Yujiro Katoh ,  Yoshiaki Tachikawa ,  Naoto Sugimoto ,  Haruki Kozawaguchi

IPC分类号： G02F1/01 ,  G02F1/09 ,  G02F1/095 ,  G02B6/27

CPC分类号： G02F1/093 ,  G02F1/01 ,  G02F1/0955 ,  G02F2203/06

摘要： An inexpensive polarization independent optical nonreciprocal circuit which does not require a use of expensive birefringent crystals, optical branching circuits, and a phase adjustment. The optical nonreciprocal circuit is formed by at least one lens through which a light propagating between two waveguides passes; and a polarization rotation circuit for sequentially applying a nonreciprocal rotation and a reciprocal rotation to a first half of the light propagating between two waveguides, and sequentially applying a reciprocal rotation and a nonreciprocal rotation to a second half of the light propagating between two waveguides, so that the first half and the second half of a light propagating forward are set to have an identical polarization to form an even guided mode and coupled, while the first half and the second half for a light propagating backward are set to have opposite polarizations to form an odd non-guided mode and dissipated.

摘要翻译： 不需要使用昂贵的双折射晶体，光分路电路和相位调整的便宜的偏振无关光学非可逆电路。 光学非可逆电路由至少一个透镜形成，通过该透镜在两个波导之间传播的光通过; 以及偏振旋转电路，用于顺序地向在两个波导之间传播的光的前半部施加不可逆旋转和往复旋转，并且顺序地向在两个波导之间传播的光的后半部施加往复旋转和不可逆旋转，因此 将向前传播的光的前半部分和第二半部分设置为具有相同的偏振以形成均匀的引导模式并耦合，而用于向后传播的光的前半部分和后半部分被设置为具有相反的极化以形成 奇怪的非引导模式和消散。