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    • 8. 发明授权
    • Optical signal encoding apparatus and decoding apparatus
    • 光信号编码装置及解码装置
    • US07050676B2
    • 2006-05-23
    • US11262954
    • 2005-11-01
    • Jingo AdachiShinichi WakabayashiAkihiro Itoh
    • Jingo AdachiShinichi WakabayashiAkihiro Itoh
    • G02B6/34H04J14/00
    • H04J14/005G02B6/02204G02B6/2932H04J14/0227H04J14/0241
    • There is provided an apparatus for performing, by optical code division multiplex access, at least one of encoding and decoding of wavelength-division-multiplexed light. The apparatus includes: an optical input/output section 203 for handling input/output of the wavelength-division-multiplexed light; and N fiber gratings (where N is an integer equal to or greater than two) 101 to 103, which are in a series connection to the optical input/output section 203. Each of the N fiber gratings has a sampled grating structure having an alternating array of first regions (11 to 14; 21 to 24; and 31 to 34) which provide a refractive index modulation with a relatively large amplitude and second regions (201) which provide a refractive index modulation with a relatively small amplitude, the first and second regions being disposed with a constant period P. Each sampled grating structure defines a plurality of reflection wavelength bands which are replicated with a period that is equal to the interval (ΔT) between the central wavelengths of wavelength bands contained in the wavelength-division-multiplexed light. The central values of the respective reflection wavelength bands differ from one fiber grating to another at least during operation.
    • 提供了一种用于通过光码分多路复用访问来执行波分复用光的编码和解码中的至少一种的装置。 该装置包括:用于处理波分复用光的输入/输出的光输入/输出部分203; 和N个光纤光栅(其中N是等于或大于2的整数)101到103,它们与光输入/输出部分203串联连接。 每个N个光纤光栅具有采样光栅结构,该采样光栅结构具有第一区域(11至14; 21至24;和31至34)的交替阵列,其提供具有相对较大幅度的折射率调制和第二区域(201) 提供具有相对小幅度的折射率调制,第一和第二区域以恒定周期P布置。每个采样的光栅结构限定多个反射波长带,其被复制为等于间隔(DeltaT)的周期, 在波分复用光中包含的波长带的中心波长之间。 至少在操作期间,各个反射波长带的中心值与一个光纤光栅不同。