公开(公告)号：US6111998A

公开(公告)日：2000-08-29

申请号：US919306

申请日：1997-08-28

申请人： Tatemi Ido ,  Hirohisa Sano ,  Hiroyuki Gomyo

发明人： Tatemi Ido ,  Hirohisa Sano ,  Hiroyuki Gomyo

IPC分类号： G02B6/126 ,  G02B6/12 ,  G02B6/14 ,  G02F1/025 ,  H01L27/15 ,  H01S3/10 ,  H01S5/00 ,  H01S5/026 ,  H01S5/10 ,  H01S5/50 ,  G02B6/26

CPC分类号： G02B6/14 ,  G02B2006/12121 ,  G02B2006/12145 ,  H01S5/10 ,  H01S5/1064 ,  H01S5/50

摘要： A semiconductor optical device, a fiber optical amplifier and an optical transmission system are disclosed. The semiconductor optical device is excellent in the stability of the coupling efficiency and the splitting ratio of a Y-branch. Both the fiber optical amplifier and the optical transmission system operate in a stable manner over a long period of time even if an optical waveguide is employed which is operative in a multi-mode in the transverse direction. The semiconductor optical device has an optical waveguide, a mode filter for transmitting therethrough light of a fundamental mode and blocking the propagation of light of a higher-order mode. The mode filter is provided in at least a part of the optical waveguide. The width of the mode filter is larger than that of the optical waveguide.

摘要翻译： 公开了半导体光学器件，光纤放大器和光传输系统。 半导体光学器件的耦合效率的稳定性和Y分支的分光比优异。 即使使用在横向上以多模式操作的光波导，光纤光放大器和光传输系统也能够在长时间内稳定地工作。 半导体光学器件具有光波导，用于透射基模光的模式滤波器，并阻止高阶模的光的传播。 模式滤波器设置在光波导的至少一部分中。 模式滤波器的宽度大于光波导的宽度。

公开(公告)号：US06700910B1

公开(公告)日：2004-03-02

申请号：US09503740

申请日：2000-02-15

申请人： Masahiro Aoki ,  Shinya Sasaki ,  Tomonobu Tsuchiya ,  Hiroyuki Gomyo

发明人： Masahiro Aoki ,  Shinya Sasaki ,  Tomonobu Tsuchiya ,  Hiroyuki Gomyo

IPC分类号： H01S500

CPC分类号： H01S5/0265 ,  B82Y20/00 ,  H01S5/0261 ,  H01S5/0425 ,  H01S5/0612 ,  H01S5/12 ,  H01S5/2213 ,  H01S5/2231 ,  H01S5/34326 ,  H01S5/34373 ,  H01S2301/173

摘要： In order to form a wavelength tunable laser capable of tuning a wave over a wide range by simple control means, a thin film heater is mounted either over an upper electrode of a ridge waveguide semiconductor laser having ridge waveguides on a semiconductor substrate or over the semiconductor substrate and on both sides of the ridge waveguide with a gap of a few &mgr;m. By controlling a current passed to the thin film heater, the oscillation wavelength of the semiconductor laser is tuned. In the case where the thin film heater is mounted over an upper electrode of a ridge waveguide, a nonconductor is formed on both sides of the ridge conductor to more efficiently enable heat from the heater to reach an active layer of the ridge waveguide more efficiently.

摘要翻译： 为了形成能够通过简单的控制装置在宽范围内调谐波长的波长可调激光器，薄膜加热器安装在半导体衬底上或半导体衬底上的具有脊波导的脊波导半导体激光器的上电极 基板和脊波导的两侧，间隙为几毫米。 通过控制流过薄膜加热器的电流，调整半导体激光器的振荡波长。 在薄膜加热器安装在脊波导的上电极的情况下，在脊导体的两侧形成非导体，以更有效地使来自加热器的热量更有效地到达脊波导的有源层。