公开(公告)号：EP0774679A1

公开(公告)日：1997-05-21

申请号：EP96118262.3

申请日：1996-11-14

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Ito, Masumi, c/o Sumitomo Elec. Ind., Ltd. ,  Inoue, Akira, c/o Sumitomo Elec. Ind., Ltd. ,  Iwashima, Toru, c/o Sumitomo Elelc. Ind., Ltd. ,  Miyajima, Yoshiaki

IPC分类号： G02B6/293 ,  G02B6/124 ,  G02B6/34

CPC分类号： G02B6/29317 ,  G02B6/02076 ,  G02B6/021 ,  G02B6/243 ,  G02B6/29319 ,  G02B6/29325 ,  G02B6/29328 ,  G02B6/3845

摘要： The present invention relates to an optical filter having a waveguide structure constituted by a core region (12) in which a grating (16) for reflecting light of a predetermined wavelength is formed at a predetermined portion and a cladding region (14) which has a lower refractive index than the core region and covers the core region. In particular, this optical filter has a light-absorbing structure (140) for absorbing, of light to be reflected by the grating, a light component radiated from the grating to the cladding region. This light-absorbing structure is disposed, at least, at a region where the light component radiated from the grating to the cladding region reaches.

摘要翻译： 本发明涉及一种具有波导结构的滤光器，该波导结构由芯区（12）构成，其中在预定部分形成用于反射预定波长的光的光栅（16）和包含区域 折射率低于核心区域并覆盖核心区域。 特别地，该滤光器具有用于吸收由光栅反射的光的光吸收结构（140），从光栅辐射到包层区域的光分量。 该光吸收结构至少设置在从光栅辐射到包层区域的光分量到达的区域。

公开(公告)号：EP0772265B1

公开(公告)日：2003-06-11

申请号：EP96115368.1

申请日：1996-09-25

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Shigehara, Masakazu, c/o Sumitomo Elec. Ind., Ltd. ,  Inoue, Akira, c/o Sumitomo Elec. Ind., Ltd.

IPC分类号： H01S5/10 ,  G01M11/00 ,  H04B10/08

CPC分类号： G01M11/3145 ,  G01M11/3136 ,  H01S5/0622 ,  H01S5/0683 ,  H01S5/1206 ,  H01S5/1212 ,  H01S5/1215 ,  H01S5/146 ,  H04B10/071

公开(公告)号：EP0772265A1

公开(公告)日：1997-05-07

申请号：EP96115368.1

申请日：1996-09-25

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Shigehara, Masakazu, c/o Sumitomo Elec. Ind., Ltd. ,  Inoue, Akira, c/o Sumitomo Elec. Ind., Ltd.

IPC分类号： H01S3/085 ,  G01M11/00 ,  H04B10/08

CPC分类号： G01M11/3145 ,  G01M11/3136 ,  H01S5/0622 ,  H01S5/0683 ,  H01S5/1206 ,  H01S5/1212 ,  H01S5/1215 ,  H01S5/146 ,  H04B10/071

摘要： The pulse laser light source apparatus in the OTDR apparatus of present invention comprises an optical waveguide which receives and guides the light emitted from the first light-emitting end face, wherein the optical waveguide comprises a reflecting area which selectively reflects a part of light emitted from a light-emitting end face of a semiconductor light-emitting device, a core of the reflecting area comprises a first diffraction grating which is disposed in a first area and whose refractive index periodically changes along an optical-axis direction, the first diffraction grating selectively reflects, of the light emitted from the light-emitting end face of the semiconductor light-emitting device, a part of the light within a first wavelength range. And the diffraction grating is one of denvices which constitute a laser resonator.

摘要翻译： 本发明的OTDR装置中的脉冲激光光源装置包括：光波导，其接收并引导从第一发光端面发出的光，其中，所述光波导包括反射区域，其选择性地反射从 半导体发光器件的发光端面，反射区域的芯包括设置在第一区域中并且其折射率沿光轴方向周期性变化的第一衍射光栅，第一衍射光栅选择性地 从半导体发光器件的发光端面发射的光反射一部分光在第一波长范围内。 并且衍射光栅是构成激光谐振器的缺陷之一。