公开(公告)号：US4999139A

公开(公告)日：1991-03-12

申请号：US481460

申请日：1990-02-16

申请人： Takashi Kurihara ,  Shiro Matsumoto ,  Toshikuni Kainou ,  Hirohisa Kanbara ,  Kenichi Kubodera

发明人： Takashi Kurihara ,  Shiro Matsumoto ,  Toshikuni Kainou ,  Hirohisa Kanbara ,  Kenichi Kubodera

IPC分类号： C07C211/52 ,  C07C215/16 ,  C07C215/76 ,  C07C217/84 ,  C07C219/34 ,  C07C233/43 ,  C07D455/04 ,  C08F12/26 ,  G02F1/361

CPC分类号： G02F1/3612 ,  C07C211/52 ,  C07C215/16 ,  C07C215/76 ,  C07C217/84 ,  C07C219/34 ,  C07C233/43 ,  C07D455/04 ,  C08F12/26 ,  G02F1/3611

摘要： A nonlinear optical device having an optical medium and an optical element including a polarizer, an optical resonator and a reflector is provided. The optical medium includes an organic nonlinear optical material represented by a formula: ##STR1## wherein each of R.sub.1 and R.sub.2 is an alkyl group having 2 to 6 carbon atoms or a hydroxyalkyl group having 2 to 6 carbon atoms, R.sub.1 and R.sub.2 being same or different groups; or R.sub.1 is an ethyl group and R.sub.2 is an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) or a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and each of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is individually a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, or an alkylamide group, where X.sub.1, X.sub.2, X.sub.3 and X.sub.4 may be the same or different groups.

公开(公告)号：US4997595A

公开(公告)日：1991-03-05

申请号：US481775

申请日：1990-02-16

申请人： Takashi Kurihara ,  Shiro Matsumoto ,  Toshikuni Kaino ,  Hirohisa Kanbara ,  Kenichi Kubodera

发明人： Takashi Kurihara ,  Shiro Matsumoto ,  Toshikuni Kaino ,  Hirohisa Kanbara ,  Kenichi Kubodera

IPC分类号： C07C211/52 ,  C07C215/16 ,  C07C215/76 ,  C07C217/84 ,  C07C219/34 ,  C07C233/43 ,  C07D455/04 ,  C08F12/26 ,  G02F1/361

CPC分类号： G02F1/3612 ,  C07C211/52 ,  C07C215/16 ,  C07C215/76 ,  C07C217/84 ,  C07C219/34 ,  C07C233/43 ,  C07D455/04 ,  C08F12/26 ,  G02F1/3611

摘要： An organic nonlinear optical device having a nitrostyrene compound represented by a formula: ##STR1## wherein R.sub.1 is an ethyl group R.sub.2 is a group selected from the group consisting of an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) and a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are the same or different and each is selected from the group consisting of a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, and an alkylamide group, is provided.

公开(公告)号：US06791733B2

公开(公告)日：2004-09-14

申请号：US10092628

申请日：2002-03-08

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kenichi Kubodera

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kenichi Kubodera

IPC分类号： G02F103

CPC分类号： G02F1/2255

摘要： A resonance type optical modulator includes an optical path having electro-optical effect characteristics, a modulation electrode formed along the optical path for applying an electric field to the optical path, a common electrode formed in opposition to the modulation electrode, a feeding line that is connected to the modulation electrode and stubs connected to the feeding line, wherein the feeding line, stubs and common electrode are provided on one side of a region that is divided by the modulation electrode. A specific example is a resonance type optical modulator using a symmetric or an asymmetric electrode, that includes an optical path having electro-optical effect characteristics, a first stub (an open stub) (an open-ended asymmetric coplanar waveguide) or a short stub (a short-ended asymmetric coplanar waveguide), a second stub (an open or short stub) connected to the first stub, a feeding line connected to the first and second stubs and a common electrode, wherein the first and second stubs are formed along a single optical path to comprise a modulation electrode for applying an electric field to the optical path. As a result, the modulator has a configuration easy to fabricate without damaging the effective modulation field strength applied to the optical path, making it possible to realize high modulation efficiency with a low level of electric power.

摘要翻译： 共振型光调制器包括具有电光效应特性的光路，沿着用于向光路施加电场的光路形成的调制电极，与调制电极相对形成的公共电极， 连接到调制电极和连接到馈电线的短截线，其中馈电线，短截线和公共电极设置在由调制电极分割的区域的一侧上。 一个具体实例是使用对称或不对称电极的共振型光学调制器，其包括具有电光效应特性的光路，第一短截线（开口短截线）（开口端不对称共面波导）或短截线 （短端不对称共面波导），连接到第一短截线的第二短截线（开口或短截线），连接到第一和第二短截线的馈电线和公共电极，其中第一和第二短截线沿着 包括用于向光路施加电场的调制电极的单个光路。 结果，调制器具有易于制造而不损害施加到光路的有效调制场强的构造，使得可以以低电平实现高调制效率。

公开(公告)号：US5025448A

公开(公告)日：1991-06-18

申请号：US492716

申请日：1990-03-13

申请人： Shoichi Sudo ,  Yoshihisa Sakai ,  Hiroshi Yasaka ,  Tetsuhiko Ikegami ,  Yuzo Yoshikuni ,  Itaru Yokohama ,  Kenichi Kubodera

发明人： Shoichi Sudo ,  Yoshihisa Sakai ,  Hiroshi Yasaka ,  Tetsuhiko Ikegami ,  Yuzo Yoshikuni ,  Itaru Yokohama ,  Kenichi Kubodera

IPC分类号： G02B6/26 ,  G02B6/42 ,  H01S5/022 ,  H01S5/0683 ,  H01S5/0687 ,  H01S5/40 ,  H04B10/50 ,  H04B10/572

CPC分类号： H04B10/572 ,  G02B6/262 ,  G02B6/4204 ,  H01S5/0687 ,  H04B10/503 ,  H01S5/02284 ,  H01S5/0683 ,  H01S5/4031

摘要： A method of stabilizing the frequency of a semiconductor laser comprises stabilizing a time-dependent frequency fluctuation by utilizing an optical energy absorption medium including an isotope acetylene gas molecule. An apparatus for stabilizing the frequency of a semiconductor laser, comprises a semiconductor laser, an optical energy absorption medium, a photodetector and a control circuit as essential elements. The optical energy absorption medium includes an isotope acetylene molecule.