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    • 5. 发明授权
    • Optical transmission system and channel assigning method
    • 光传输系统和信道分配方法
    • US06763194B2
    • 2004-07-13
    • US09757580
    • 2001-01-11
    • Toshiaki OkunoMasayuki Nishimura
    • Toshiaki OkunoMasayuki Nishimura
    • H04J1402
    • H04J14/0221H04J14/0227H04J14/0246H04J14/028
    • The present invention relates to an optical transmission system and a channel assigning method with structure to reduce dispersion of power levels among signals dropped at respective signal branchpoints on an optical transmission line out of signals of multiple channels amplified in an optical amplifier. The optical transmission system has an optical transmission line in which signals of multiple channels propagate, an optical amplifier provided on the transmission line, and a plurality of signal branchpoints disposed on the downstream transmission line in which the signals of the channels outputted from the optical amplifier propagate. Each of the signal branchpoints drops a signal of a channel with a lowest power level out of arriving signals in the channels. This reduces the dispersion of power levels among signals dropped at the respective branchpoints, as a whole of the optical transmission system.
    • 本发明涉及一种光传输系统和信道分配方法,其结构是在光放大器中放大的多个信道的信号上,在光传输线上的各个信号分支点处降低的信号中降低功率电平的色散。 光传输系统具有传输多个信道的光传输线,设置在传输线上的光放大器以及设置在下行传输线上的多个信号分支点,其中从光放大器输出的信道的信号 传播。 每个信号分支点从信道中的到达信号中丢弃具有最低功率电平的信道的信号。 这降低了作为整个光传输系统在相应分支点处丢弃的信号之间功率电平的分散。
    • 6. 发明授权
    • Raman amplifying control unit and optical transmission system
    • 拉曼放大控制单元和光传输系统
    • US06724525B2
    • 2004-04-20
    • US09788659
    • 2001-02-21
    • Toshiaki OkunoEisuke SasaokaMasayuki NishimuraShigeru Tanaka
    • Toshiaki OkunoEisuke SasaokaMasayuki NishimuraShigeru Tanaka
    • H01S300
    • H01S3/302H01S3/0014H01S3/06754H01S3/1301H01S3/1305
    • Disclosed are an optical transmission system and a Raman amplifying control unit that can stabilize the effective loss of a transmission line even if the optical transmission system has a relay station between a transmitting station and a receiving station. The optical transmission system and the Raman amplifying control unit have an introducing means for outputting inspection light and introducing it to the transmission line, a receiving means for receiving the back-scatter from the inspection light, and a control means for inspecting the transmission line and controlling an exciting light supplying means according to the received backscattering light. The introducing means, the receiving means, and the control means are provided together with the exciting light supplying means in a station at the transmitting side or receiving side of a relay section in the optical transmission system.
    • 公开了一种光传输系统和拉曼放大控制单元,其即使光传输系统在发射站和接收站之间具有中继站,也可以稳定传输线的有效损耗。 光传输系统和拉曼放大控制单元具有用于输出检查光并将其引入传输线的引入装置,用于从检查光接收反向散射的接收装置和用于检查传输线的控制装置和 根据所接收的反向散射光控制激励光供给装置。 引导装置,接收装置和控制装置与光传输系统中的中继部的发送侧或接收侧的站中的激励光供给装置一起设置。
    • 10. 发明授权
    • Optical transmission line, method of making optical transmission line, and optical transmission system
    • 光传输线,制造光传输线路的方法和光传输系统
    • US07085040B2
    • 2006-08-01
    • US10834189
    • 2004-04-29
    • Toshiaki OkunoMasayuki Nishimura
    • Toshiaki OkunoMasayuki Nishimura
    • H04B10/13H04B10/17
    • H01S3/22H01S3/06754H01S3/094011H01S3/107H01S3/30H01S3/302
    • The present invention relates to an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, a method of making this optical transmission line, and an optical transmission system using this optical transmission line. This optical transmission line is an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, wherein a region yielding the maximum value of Raman gain coefficient is separated from an end portion where the pumping light is supplied by a predetermined distance along a direction in which the pumping light advances. This optical transmission line can restrain the power of optical signal, at any point of the optical transmission line, from increasing to such an extent that optical Kerr effects occurs remarkably and from decreasing to such an extent that the SN ratio deteriorates greatly, and can fully secure the power of optical signal at the end point of the optical transmission line.
    • 本发明涉及一种能够提供泵浦光时能够进行光信号的拉曼放大的光传输线路,制造该光传输线路的方法以及使用该光传输线路的光传输系统。 该光传输线是当向其提供泵浦光时能够对光信号进行拉曼放大的光传输线,其中产生拉曼增益系数的最大值的区域与泵送光被提供预定距离的端部分离 沿着泵浦光前进的方向。 该光传输线可以抑制在光传输线的任何点的光信号的功率增加到光学克尔效应显着地发生并且从降低到使SN比大大降低的程度的程度,并且可以完全 在光传输线路的终点处确保光信号的功率。