公开(公告)号：US20040197100A1

公开(公告)日：2004-10-07

申请号：US10810468

申请日：2004-03-25

申请人： Hitachi, Ltd.

发明人： Tadashi Matsuoka ,  Junya Kosaka ,  Tetsushi Nakano

IPC分类号： H04J014/02

CPC分类号： G02B6/29394 ,  G02B6/2932 ,  G02B6/29383 ,  H04B10/2525 ,  H04B10/2939 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0217

摘要： The objective is an optical transmission unit capable of coupling and branching signal lights of individual wavelengths at a data rate of 10 Gbits/s. In order to achieve the objective, DCFs are provided and proper values of dispersion compensation are given, so that different characteristics depending on the respective wavelengths to be coupled, split and pass through without being split are obtained. The signal lights are amplified by a plurality of low-excitation optical amplifiers to regain their light levels which are weakened due to using an optical coupler, branching filter and DCF together, thereby enabling a long-distance transmission.

公开(公告)号：US20030206692A1

公开(公告)日：2003-11-06

申请号：US10426090

申请日：2003-04-28

申请人： Hitachi, Ltd.

发明人： Tadashi Matsuoka ,  Junya Kosaka ,  Tetsushi Nakano

IPC分类号： G02B006/26 ,  G02B006/28

CPC分类号： G02B6/29394 ,  G02B6/2932 ,  G02B6/29383 ,  H04B10/2525 ,  H04B10/2939 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0217

摘要： The objective is an optical transmission unit capable of coupling and branching signal lights of individual wavelengths at a data rate of 10 Gbits/s. In order to achieve the objective, DCFs are provided and proper values of dispersion compensation are given, so that different characteristics depending on the respective wavelengths to be coupled, split and pass through without being split are obtained. The signal lights are amplified by a plurality of low-excitation optical amplifiers to regain their light levels which are weakened due to using an optical coupler, branching filter and DCF together, thereby enabling a long-distance transmission.

摘要翻译： 目的是能够以10G比特/秒的数据速率耦合和分离各个波长的信号光的光传输单元。 为了达到目的，提供DCF并提供色散补偿的适当值，从而获得根据要被耦合，分离和通过而不分裂的各个波长的不同特性。 信号灯由多个低激励光放大器放大，以重新获得由于使用光耦合器，分路滤波器和DCF而被削弱的光水平，从而实现长距离传输。

公开(公告)号：US20030142391A1

公开(公告)日：2003-07-31

申请号：US10337324

申请日：2003-01-07

申请人： HITACHI, LTD.

发明人： Junya Kosaka

IPC分类号： H01S003/00

CPC分类号： H04J14/0201 ,  H01S3/06754 ,  H01S3/10023 ,  H01S2301/06 ,  H04B10/2941 ,  H04B10/2942 ,  H04B10/296 ,  H04B2210/003 ,  H04B2210/258 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0221

摘要： An optical amplification apparatus for adjusting optical power of wavelength-multiplexed signal light at respective wavelengths and for adjusting the optical output power at the respective wavelengths and a deviation of the optical output power between the wavelengths. An optical power adjusting unit for receiving inputted light having signal light at a plurality of different wavelengths (null1, null2, null3, . . . , nullN) multiplexed thereon, amplifying or attenuating light at least one wavelength included in the received light independently of light at different wavelengths from the wavelength of the light, is provided before or after an optical amplifier unit for amplifying the light having the signal light at the plurality of different wavelengths multiplexed thereon. Further, a control unit is provided for controlling the gain of amplification or attenuation performed by the optical power adjusting unit and the gain of amplification performed by the optical amplifier unit, respectively.