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    • 5. 发明专利
    • Wavelength-selective switch
    • JP5373291B2
    • 2013-12-18
    • JP2008003425
    • 2008-01-10
    • 日本電信電話株式会社
    • 真司 美野賢哉 鈴木直樹 大庭元速 石井和則 妹尾
    • G02F1/13G02B26/08H04B10/00H04B10/27H04B10/40H04B10/50H04B10/60H04J14/00H04J14/02
    • PROBLEM TO BE SOLVED: To provide a wavelength selection switch which does not use MEMS (Micro Electro Mechanical Systems) mirror array, whose layout is easy and which has high reliability and stability. SOLUTION: A one input port-M output port type wavelength selection switch inputs an optical signal from one input port to separate the optical signal into a plurality of optical signals having wavelengths different from one another, changes optical axes of the optical signals having the respective wavelengths to make the optical signals correspond to desired M (M is an integer of 2 or more) output ports, and outputs the optical signals corresponding to the respective output ports from the respective output ports by joining the plurality of optical signals having the wavelengths different from one another. The switch includes: an AWG (Arrayed Wavelength Grating) for separating the optical signal made incident on the input port into the plurality of optical signals having the wavelengths different from one another and for emitting the optical signals at emission angles corresponding to the wavelengths; a lens 40 condensing the optical signals separated for each wavelength; and a reflection type liquid crystal phase modulation element 200 giving phase differences to each of the condensed optical signals to change progress directions thereof. COPYRIGHT: (C)2009,JPO&INPIT