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    • 4. 发明申请
    • Optical switching method and optical switch
    • 光开关方式和光开关
    • US20080151244A1
    • 2008-06-26
    • US12002762
    • 2007-12-19
    • Ryou OkabeShigeki WatanabeFumio Futami
    • Ryou OkabeShigeki WatanabeFumio Futami
    • G01J4/00
    • H04J14/08G01J4/04G01R13/347G02F1/3519H04B10/0775H04J14/06H04Q11/0005H04Q2011/0035H04Q2011/0039H04Q2213/1301
    • In a method and an optical switch by which a signal light is accurately switched even if a polarization state of a signal light inputted has a fluctuation, power of an output light of a polarizer which receives a signal light extracted from an output light of a nonlinear optical medium is monitored and a polarization state of an input signal light to the nonlinear optical medium is controlled so that the power becomes minimum (or maximum). The polarization state of the input signal light is monitored, a calculation of performing a predetermined conversion is executed to the polarization state of the input signal light, and a calculated polarization state is recorded (or recorded without conversion). A polarization state of a control light with respect to the input signal light is monitored and the polarization state of the control light is controlled so as to coincide with the polarization state of the input signal light recorded.
    • 在即使输入的信号光的偏振状态具有波动的情况下信号光被精确地切换的方法和光开关中,也可以接收从非线性的输出光中提取的信号光的偏振器的输出光的功率 监视光学介质,并且控制对非线性光学介质的输入信号光的偏振状态,使得功率变为最小(或最大)。 监视输入信号光的偏振状态,对输入信号光的偏振状态执行预定转换的计算,计算出的偏振状态被记录(或不进行转换记录)。 监视控制光相对于输入信号光的偏振状态,并控制控制光的偏振状态,以便与记录的输入信号光的偏振态一致。
    • 7. 发明授权
    • Optical switching method and optical switch
    • 光开关方式和光开关
    • US07978319B2
    • 2011-07-12
    • US12002762
    • 2007-12-19
    • Ryou OkabeShigeki WatanabeFumio Futami
    • Ryou OkabeShigeki WatanabeFumio Futami
    • G01N21/00G01J4/00H04B10/00
    • H04J14/08G01J4/04G01R13/347G02F1/3519H04B10/0775H04J14/06H04Q11/0005H04Q2011/0035H04Q2011/0039H04Q2213/1301
    • In a method and an optical switch by which a signal light is accurately switched even if a polarization state of a signal light inputted has a fluctuation, power of an output light of a polarizer which receives a signal light extracted from an output light of a nonlinear optical medium is monitored and a polarization state of an input signal light to the nonlinear optical medium is controlled so that the power becomes minimum (or maximum). The polarization state of the input signal light is monitored, a calculation of performing a predetermined conversion is executed to the polarization state of the input signal light, and a calculated polarization state is recorded (or recorded without conversion). A polarization state of a control light with respect to the input signal light is monitored and the polarization state of the control light is controlled so as to coincide with the polarization state of the input signal light recorded.
    • 在即使输入的信号光的偏振状态具有波动的情况下信号光被精确地切换的方法和光开关中,也可以接收从非线性的输出光中提取的信号光的偏振器的输出光的功率 监视光学介质,并且控制对非线性光学介质的输入信号光的偏振状态,使得功率变为最小(或最大)。 监视输入信号光的偏振状态,对输入信号光的偏振状态执行预定转换的计算,计算出的偏振状态被记录(或不进行转换记录)。 监视控制光相对于输入信号光的偏振状态,并控制控制光的偏振状态,以便与记录的输入信号光的偏振态一致。
    • 9. 发明授权
    • Optical switch
    • 光开关
    • US07397975B2
    • 2008-07-08
    • US11627423
    • 2007-01-26
    • Ryou OkabeShigeki WatanabeFumio FutamiShunsuke Ono
    • Ryou OkabeShigeki WatanabeFumio FutamiShunsuke Ono
    • G02F1/295G02B6/24G02B6/00
    • G02F1/3536G02F1/365G02F2201/17G02F2201/34
    • Reflection means such as a mirror are provided on the output end of an optical fiber, and the input signal light and control light are returned to the optical fiber. Although the zero-dispersion wavelength of the optical fiber fluctuates in the longitudinal direction, if the length is relatively short, it is possible to manufacture a high yield of optical fibers, which monotonically changes the zero-dispersion wavelength. Therefore, a relatively short optical fiber with a monotonic zero-dispersion change can be used. Since the zero-dispersion change is monotonic and the optical fiber is short, the amount of change in the zero-dispersion wavelength is small and the bandwidth becomes broader when the control light is set at the position of the average zero-dispersion wavelength. Additionally, although the length of the optical fiber is short, the operating length is twice as long and thus the generation efficiency does not degrade.
    • 在光纤的输出端设置反射镜等反射装置,输入信号光和控制光返回到光纤。 虽然光纤的零色散波长在长度方向上波动,但是如果长度相对较短,则可以制造高产率的光纤,其单调地改变零色散波长。 因此,可以使用具有单调零色散变化的相对短的光纤。 由于零色散变化是单调的并且光纤短,所以当色散波长的平均值位于控制光时,零色散波长的变化量小,带宽变宽。 此外,虽然光纤的长度短,但是操作长度是两倍长,因此发电效率不降低。