公开(公告)号：US07239763B2

公开(公告)日：2007-07-03

申请号：US11085609

申请日：2005-03-22

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kaoru Higuma ,  Shingo Mori

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kaoru Higuma ,  Shingo Mori

IPC分类号： G02F1/225

CPC分类号： G02F1/3136 ,  G02F1/0123 ,  G02F1/035 ,  G02F1/225 ,  G02F2001/212

摘要： An optical SSB modulator capable of appropriately adjusting a phase difference of light in the MZ waveguides and automatically adjusting a voltage impressed to the bias adjustment electrodes is provided. The above-mentioned object is achieved by an optical SSB modulator (1) provided with a first sub Mach-Zehnder waveguide (MZA) (2), a second sub Mach-Zehnder waveguide (MZB) (3), a main Mach-Zehnder waveguide (MZC) (4), a first bias adjustment electrode (DCA electrode) (5), a second bias adjustment electrode (DCB electrode) (6), a first modulation electrode (RFA electrode) (7), a second modulation electrode (RFB electrode) (8) and a third bias adjustment electrode (DCC electrode) (9), wherein either one of or both of output portions (10, 11) of the MZA and the MZB have an X-branching form, and specifically having one of light paths of the X-branching connected to a photodetector.

摘要翻译： 提供一种能够适当地调整MZ波导中的光的相位差并自动调节施加到偏置调节电极的电压的光学SSB调制器。 上述目的通过一种光学SSB调制器（1）来实现，所述光学SSB调制器（1）设置有第一子马赫 - 曾德尔波导（MZ）和第二子马赫 - 曾德尔波导（MZ＆lt; SUB＆amp; （3），主马赫 - 曾德尔波导（MZ）C（4），第一偏置调节电极（DCA电极）（ 5），第二偏置调整电极（DCB电极）（6），第一调制电极（RFA电极）（7），第二调制电极（RF B电极）（8）和第三偏置调整电极（DC电极）（9），其中，输出部分（10,11）中的任一个或两个 MZA A和MZ B B具有X分支形式，并且具体地将X分支的光路中的一个连接到光电检测器。

公开(公告)号：US07212331B2

公开(公告)日：2007-05-01

申请号：US11094761

申请日：2005-03-31

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F1/00 ,  G02B26/00

CPC分类号： G02F1/0356 ,  G02F1/2255 ,  G02F2201/17 ,  G02F2201/307 ,  G02F2202/20 ,  H01S3/0085 ,  H01S3/1608

摘要： A reciprocating optical modulator includes a continuous light path fulfilling an amplification function, an optical modulation part formed on the light path, a first optical band-pass filter and a second optical band-pass filter formed to nip the optical modulation part therebetween and a device to introduce exciting light for exciting the light path. The optical modulation part, first and second optical band-pass filters and device are disposed on the light path as formed in a single optical crystal or in a multiplicity of optical crystals. The first optical band-pass filter admits incident light and reflects light having the incident light modulated. The second optical bandpass filter reflects the incident light and emits the light having the incident light modulated. The modulator can also include a third optical band-pass filter disposed between the optical modulation part and the second optical band-pass filter for removing the incident light.

摘要翻译： 往复式光学调制器包括实现放大功能的连续光路，形成在光路上的光调制部分，第一光学带通滤光器和形成为夹持光调制部分的第二光带通滤波器， 引入激动人心的光线激发光线。 光学调制部分，第一和第二光学带通滤波器和器件设置在单个光学晶体或多个光学晶体中形成的光路上。 第一光学带通滤波器承认入射光并且反射具有入射光调制的光。 第二光学带通滤波器反射入射光并发射具有入射光调制的光。 调制器还可以包括设置在光学调制部分和第二光学带通滤波器之间用于去除入射光的第三光学带通滤波器。

公开(公告)号：US20060227411A1

公开(公告)日：2006-10-12

申请号：US11094761

申请日：2005-03-31

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F1/00

CPC分类号： G02F1/0356 ,  G02F1/2255 ,  G02F2201/17 ,  G02F2201/307 ,  G02F2202/20 ,  H01S3/0085 ,  H01S3/1608

摘要： A reciprocating optical modulator includes a continuous light path fulfilling an amplification function, an optical modulation part formed on the light path, a first optical band-pass filter and a second optical band-pass filter formed to nip the optical modulation part therebetween and a device to introduce exciting light for exciting the light path. The optical modulation part, first and second optical band-pass filters and device are disposed on the light path as formed in a single optical crystal or in a multiplicity of optical crystals. The first optical band-pass filter admits incident light and reflects light having the incident light modulated. The second optical bandpass filter reflects the incident light and emits the light having the incident light modulated. The modulator can also include a third optical band-pass filter disposed between the optical modulation part and the second optical band-pass filter for removing the incident light.

摘要翻译： 往复式光学调制器包括实现放大功能的连续光路，形成在光路上的光调制部分，第一光学带通滤光器和形成为夹持光调制部分的第二光带通滤波器， 引入激动人心的光线激发光线。 光学调制部分，第一和第二光学带通滤波器和器件设置在单个光学晶体或多个光学晶体中形成的光路上。 第一光学带通滤波器承认入射光并且反射具有入射光调制的光。 第二光学带通滤波器反射入射光并发射具有入射光调制的光。 调制器还可以包括设置在光学调制部分和第二光学带通滤波器之间用于去除入射光的第三光学带通滤波器。

公开(公告)号：US06987904B2

公开(公告)日：2006-01-17

申请号：US10345971

申请日：2003-01-17

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02B6/26

CPC分类号： G02B6/2861

摘要： A variable-optical-delay apparatus with a single wavelength converter and optical loop path has an optical modulator able to adjust the delay time according to the input optical signal. The variable-optical-delay apparatus has an optical input section and an optical output section, an optical filter and a wavelength shifter able to adjust an amount by which a wavelength of an input optical signal is shifted disposed on an optical path extending from the input section to the output section. The input optical signal is output from the output section after passing the wavelength shifter a number of times that is determined according to the input optical signal. A resonant type optical modulator can be used that is set between filters, or set between a filter and a reflector. Part of an optical path from the input section to the output section is in the form of an optical loop, an optical modulator is provided on the optical loop.

公开(公告)号：US06735010B2

公开(公告)日：2004-05-11

申请号：US10369546

申请日：2003-02-21

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F1035

CPC分类号： B82Y20/00 ,  G02F1/017 ,  G02F1/01708 ,  G02F1/0344 ,  G02F2001/0155

摘要： A resonance-type semiconductor optical modulator has an asymmetrical electrode structure in which the microwave power is applied to the semiconductor optical modulation element via a resonator. The resulting higher modulation voltage provides high modulation efficiency while controlling the amount of power consumption. The semiconductor optical modulation element includes an open-ended stub, a short-ended stub connected to the open-ended stub, a feeding line connected to both stubs and common electrodes. The stubs are formed in contact and the semiconductor optical modulation element is connected to the open-ended stub. Otherwise, the resonance-type semiconductor optical modulator can include a semiconductor optical modulation element, a first open-ended stub, a second open-ended stub connected to the first open-ended stub and having a different length than the first open-ended stub, a feeding line that is electromagnetically connected to both open-ended stubs, and common electrodes, in which the first and second open-ended stubs are formed in mutual contact and the semiconductor optical modulation element is connected to an open-ended stub portion other than a portion connecting the feeding line to the open-ended stubs.

摘要翻译： 共振型半导体光调制器具有通过谐振器将微波功率施加到半导体光调制元件的非对称电极结构。 所产生的较高调制电压在控制功耗的同时提供高调制效率。 半导体光调制元件包括开路短截线，连接到开口短截线的短端短截线，连接到两个短截线和公共电极的馈线。 短截线形成为接触，并且半导体光调制元件连接到开放端短截线。 否则，谐振型半导体光调制器可以包括半导体光调制元件，第一开端短截线，连接到第一开端短截线并且具有与第一开端短截线不同的长度的第二开端短截线 与两个开口短截线电磁连接的馈电线和公共电极，其中第一和第二开口短截线形成为相互接触的，并且半导体光调制元件连接到其他的开放端短截线部分 比将馈电线连接到开放端短截线的部分。

公开(公告)号：US06970655B2

公开(公告)日：2005-11-29

申请号：US10084968

申请日：2002-03-01

申请人： Takashi Ono ,  Shinichi Shimotsu ,  Masayuki Izutsu

发明人： Takashi Ono ,  Shinichi Shimotsu ,  Masayuki Izutsu

IPC分类号： G02F1/035 ,  H04B10/00 ,  H04B10/516 ,  H04B10/61 ,  H04B10/04

CPC分类号： H04B10/50572 ,  H04B10/505

摘要： The present invention relates to a method for generating a single-sideband optical signal. According to the method, as data signals having a 90-degree phase difference with respect to input data signals, which are NRZ signals at 10 Gb/s, 0.5-bit delay data signals are generated by a 0.5-bit delay circuit for obtaining a delay corresponding to π/2 of the bit period of the input data signal. An SSB optical signal produced from the data signals and the 0.5-bit delay data signals is generated through an optical filter. Further, to eliminate a residual intensity-modulated component, the generated SSB optical signal is fed back to appropriately adjust the center frequency of the optical filter. The carrier output frequency of a semiconductor laser can be adjusted instead of the center frequency of the optical filter. When an RZ signal is used as an input data signal, a 0.25-bit delay circuit is used.

摘要翻译： 本发明涉及一种用于产生单边带光信号的方法。 根据该方法，作为相对于作为10Gb / s的NRZ信号的输入数据信号具有90度相位差的数据信号，0.5位延迟数据信号由0.5位延迟电路产生，以获得 对应于输入数据信号的位周期的pi / 2的延迟。 通过光滤波器产生从数据信号和0.5位延迟数据信号产生的SSB光信号。 此外，为了消除残留强度调制分量，反馈生成的SSB光信号以适当地调整滤光器的中心频率。 可以调整半导体激光器的载波输出频率而不是滤光器的中心频率。 当使用RZ信号作为输入数据信号时，使用0.25位延迟电路。

公开(公告)号：US4674827A

公开(公告)日：1987-06-23

申请号：US816974

申请日：1986-01-06

申请人： Masayuki Izutsu ,  Tadasi Sueta ,  Masaharu Matano

发明人： Masayuki Izutsu ,  Tadasi Sueta ,  Masaharu Matano

IPC分类号： G01C19/72 ,  G01K11/00 ,  G01L1/24 ,  G02B6/122 ,  G02B6/125 ,  G02B6/28 ,  G02B6/10

CPC分类号： G02B6/2804 ,  G01C19/721 ,  G01K11/00 ,  G01L1/242 ,  G02B6/122 ,  G02B6/125

摘要： A slab-type optical device comprising a pair of single mode waveguides equal in phase constant and intersecting each other each at its one end and a pair of single mode waveguides different in phase constant and intersecting each other each at its one end. The pairs of waveguides are joined to each other at their intersections. The angle of intersection of the two waveguides in each pair is set to such a small value that when light propagates along the waveguide a very small distance, the variation in the spacing between the waveguides is negligible relative to the distance of propagation.

摘要翻译： 一种平板型光学器件，包括一对相位恒定并且在其一端彼此相交并且相位不同的一对单模波导在其一端相互相交的单模波导。 波导对在它们的交点处彼此连接。 每对中的两个波导的交叉角被设定为如此小的值，即当光沿着波导传播非常小的距离时，相对于传播距离，波导之间的间隔的变化是可忽略的。

公开(公告)号：US06304689B1

公开(公告)日：2001-10-16

申请号：US09227355

申请日：1999-01-08

申请人： Benjamin Dingel ,  Masayuki Izutsu

发明人： Benjamin Dingel ,  Masayuki Izutsu

IPC分类号： G02B6293

CPC分类号： G02B6/29349 ,  G02B6/12019 ,  G02B6/2935 ,  G02B6/29358 ,  G02B6/29395

摘要： A general multi-function optical filter for future smart, high density wavelength division multiplexed (WDM) communication and network system applications using a Michelson-GT interferometer (MGTI) is invented. MGTI filter is a typical Michelson interferometer in which one of its reflecting mirrors is replaced by Gires-Toumois resonator (GTR). One unique feature of this device is that it can function as channel passing, channel dropping and wide bandpass filters depending on the interferometer arm length difference. The output of these functions is available in a single port. Other interesting features of this element are (1) that linewidths of both channel dropping and channel passing filters are twice as narrow compared with typical Fabry-Perot filter having similar parameters, (2) that visibility of the output for three functions is always unity regardless of the mirror reflectance value, and (3) that bandpass filter has an excellent, near-perfect, box-like response function. Numerical results showing these characteristics are presented and other applications are discussed.

摘要翻译： 发明了一种用于未来智能，高密度波分复用（WDM）通信和使用迈克尔逊-GM干涉仪（MGTI）的网络系统应用的通用多功能滤光器。 MGTI滤波器是典型的迈克尔逊干涉仪，其中一个反射镜被Gires-Toumois谐振器（GTR）代替。 该器件的一个独特之处在于它可以作为通道通道，通道丢弃和宽带通滤波器，具体取决于干涉仪臂长度差异。 这些功能的输出可以在单个端口中使用。 该元件的其他有趣的特征是（1）与具有相似参数的典型法布里 - 珀罗滤波器相比，信道丢弃和信道通过滤波器的线宽是两倍，（2）三个函数的输出的可视性总是为单位 的镜面反射率值，以及（3）带通滤波器具有优良的接近完美的盒状响应函数。 给出了显示这些特性的数值结果，并讨论了其他应用。

公开(公告)号：US4850666A

公开(公告)日：1989-07-25

申请号：US865

申请日：1987-01-06

申请人： Masayuki Izutsu ,  Tadasi Sueta ,  Masaharu Matano

发明人： Masayuki Izutsu ,  Tadasi Sueta ,  Masaharu Matano

IPC分类号： G01C19/72 ,  G01K11/00 ,  G01L1/24 ,  G02B6/122 ,  G02B6/125 ,  G02B6/28

CPC分类号： G02B6/2804 ,  G01C19/721 ,  G01K11/00 ,  G01L1/242 ,  G02B6/122 ,  G02B6/125

摘要： A slab-type optical device comprising a pair of single mode waveguides equal in phase constant and intersecting each other each at its one end and a pair of single mode waveguides different in phase constant and intersecting each other each at its one end. The pairs of waveguides are joined to each other at their intersections. The angle of intersection of the two waveguides in each pair is set to such a small value that when light propagates along the waveguide a very small distance, the variation in the spacing between the waveguides is negligible relative to the distance of propagation.

摘要翻译： 一种平板型光学器件，包括一对相位恒定并且在其一端彼此相交并且相位不同的一对单模波导在其一端相互相交的单模波导。 波导对在它们的交点处彼此连接。 每对中的两个波导的交叉角被设定为如此小的值，即当光沿着波导传播非常小的距离时，相对于传播距离，波导之间的间隔的变化是可忽略的。