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    • 3. 发明申请
    • Wavelength selective switch
    • 波长选择开关
    • US20060198583A1
    • 2006-09-07
    • US11157985
    • 2005-06-22
    • Yoichi OikawaKazuaki Akimoto
    • Yoichi OikawaKazuaki Akimoto
    • G02B6/36
    • H04Q11/0005H04Q2011/003H04Q2011/0032
    • A wavelength selective switch of the invention, separates WDM light coming out from an input fiber of a fiber collimator array according to its wavelength, in a diffraction grating, and reflects each wavelength channel proceeding in different directions by MEMS mirrors corresponding to a mirror array. In the MEMS mirrors, the angles of their reflecting surfaces are set corresponding to the location of the output port which is set in the output address of the wavelength channel to be injected. For each of the wavelength channels that reach the target output port, one part of each is reflected by the end face of an output fiber, and the reflected light is returned to the input port, and sent to a channel monitor via an optical circulator, so that the optical power corresponding to each wavelength channel is monitored. As a result it is possible to provide a small size, and low-cost, wavelength selective switch, that can monitor the power of each wavelength channel guided to a plurality of output ports, with good accuracy.
    • 本发明的波长选择开关在衍射光栅中将根据其波长的光纤准直器阵列的输入光纤输出的WDM光分离,并且通过对应于反射镜阵列的MEMS镜反射在不同方向上的每个波长信道。 在MEMS反射镜中,其反射表面的角度对应于设置在要注入的波长通道的输出地址中的输出端口的位置。 对于到达目标输出端口的每个波长通道,每个波长通道的一部分被输出光纤的端面反射,并且反射光返回到输入端口,并经由光循环器发送到通道监视器, 从而监视对应于每个波长信道的光功率。 结果,可以提供小尺寸和低成本的波长选择开关,其可以以高精度监视引导到多个输出端口的每个波长通道的功率。
    • 4. 发明授权
    • Wavelength selective switch
    • 波长选择开关
    • US07440648B2
    • 2008-10-21
    • US11157985
    • 2005-06-22
    • Yoichi OikawaKazuaki Akimoto
    • Yoichi OikawaKazuaki Akimoto
    • G02B6/26
    • H04Q11/0005H04Q2011/003H04Q2011/0032
    • A wavelength selective switch of the invention separates WDM light coming out from an input fiber of a fiber collimator array according to its wavelength, in a diffraction grating, and reflects each wavelength channel proceeding in different directions by MEMS mirrors corresponding to a mirror array. In the MEMS mirrors, the angles of their reflecting surfaces are set corresponding to the location of the output port which is set in the output address of the wavelength channel to be injected. For each of the wavelength channels that reach the target output port, one part of each is reflected by the end face of an output fiber, and the reflected light is returned to the input port, and sent to a channel monitor via an optical circulator, so that the optical power corresponding to each wavelength channel is monitored. As a result it is possible to provide a small size, and low-cost, wavelength selective switch, that can monitor the power of each wavelength channel guided to a plurality of output ports, with good accuracy.
    • 本发明的波长选择开关根据其波长在衍射光栅中分离从光纤准直器阵列的输入光纤出来的WDM光,并且通过与镜阵列相对应的MEMS镜反射在不同方向上的每个波长信道。 在MEMS反射镜中,其反射表面的角度对应于设置在要注入的波长通道的输出地址中的输出端口的位置。 对于到达目标输出端口的每个波长通道,每个波长通道的一部分被输出光纤的端面反射,并且反射光返回到输入端口,并经由光循环器发送到通道监视器, 从而监视对应于每个波长信道的光功率。 结果,可以提供小尺寸和低成本的波长选择开关,其可以以高精度监视引导到多个输出端口的每个波长通道的功率。
    • 7. 发明授权
    • Variable polarization plane rotator and optical device using same
    • 可变偏振平面旋转器和使用其的光学装置
    • US06931165B2
    • 2005-08-16
    • US10974780
    • 2004-10-28
    • Hiroshi NagaedaNobuaki MitamuraKazuaki Akimoto
    • Hiroshi NagaedaNobuaki MitamuraKazuaki Akimoto
    • G02B6/32G02B5/30G02B6/26G02B6/34G02B27/28G02F1/01G02F1/03G02F1/061G02F1/13G02F1/31G02B6/00
    • G02B6/29302G02B6/266G02B6/272G02B6/2766G02B27/286G02F1/0136G02F2201/17G02F2203/48
    • An optical device includes a small and low-cost variable polarization plane rotator that can control a rotation angle of the polarization plane easily. A variable polarization plane rotator is provided with a λ/4 phase plate having an optical axis in the same direction as, or at a 90 degree angle relative to, a polarization direction of an input light beam. A phase difference variable element has an optical axis at a ±45 degree angle relative to the optical axis of the λ/4 phase plate, to apply a variable phase difference between the polarization components parallel to and perpendicular to the optical axis thereof. A phase difference adjustment section adjusts the variable phase difference of the phase difference variable element, wherein the input light beam after being transmitted through the phase difference variable element to form elliptically polarized light or circularly polarized light, is transmitted through the λ/4 phase plate to form linearly polarized light. The polarization plane of the input light beam is rotated by an angle corresponding to the phase difference applied by the phase difference variable element.
    • 光学装置包括可以容易地控制偏振面的旋转角度的小而低成本的可变偏振面旋转器。 可变偏振面旋转体设置有λ/ 4相位板,其具有与输入光束的偏振方向相同的方向或相对于输入光束的偏振方向成90度角的光轴。 相位差可变元件相对于λ/ 4相位板的光轴具有±45度角的光轴,以在平行于其并垂直于其光轴的偏振分量之间施加可变相位差。 相位差调整部分调节相位差可变元件的可变相位差,其中通过相位差可变元件传输以形成椭圆偏振光或圆偏振光的输入光束透射通过λ/ 4相位板 以形成线偏振光。 输入光束的偏振平面旋转与由相位差可变元件施加的相位差对应的角度。
    • 10. 发明授权
    • Variable polarization plane rotator and optical device using same
    • 可变偏振平面旋转器和使用其的光学装置
    • US06826318B2
    • 2004-11-30
    • US10061307
    • 2002-02-04
    • Hiroshi NagaedaNobuaki MitamuraKazuaki Akimoto
    • Hiroshi NagaedaNobuaki MitamuraKazuaki Akimoto
    • G02B600
    • G02B6/29302G02B6/266G02B6/272G02B6/2766G02B27/286G02F1/0136G02F2201/17G02F2203/48
    • An optical device includes a small and low-cost variable polarization plane rotator that can control a rotation angle of the polarization plane easily. A variable polarization plane rotator is provided with a &lgr;/4 phase plate having an optical axis in the same direction as, or at a 90 degree angle relative to, a polarization direction of an input light beam. A phase difference variable element has an optical axis at a ±45 degree angle relative to the optical axis of the &lgr;/4 phase plate, to apply a variable phase difference between the polarization components parallel to and perpendicular to the optical axis thereof. A phase difference adjustment section adjusts the variable phase difference of the phase difference variable element, wherein the input light beam after being transmitted through the phase difference variable element to form elliptically polarized light or circularly polarized light, is transmitted through the &lgr;/4 phase plate to form linearly polarized light. The polarization plane of the input light beam is rotated by an angle corresponding to the phase difference applied by the phase difference variable element.
    • 光学装置包括可以容易地控制偏振面的旋转角度的小而低成本的可变偏振面旋转器。 可变偏振面旋转体设置有λ/ 4相位板,其具有与输入光束的偏振方向相同的方向或相对于输入光束的偏振方向成90度角的光轴。 相位差可变元件相对于λ/ 4相位板的光轴具有±45度角的光轴,以在平行于其并垂直于其光轴的偏振分量之间施加可变相位差。 相位差调整部分调节相位差可变元件的可变相位差,其中通过相位差可变元件传输以形成椭圆偏振光或圆偏振光的输入光束透射通过λ/ 4相位板 以形成线偏振光。 输入光束的偏振平面旋转与由相位差可变元件施加的相位差对应的角度。