公开(公告)号：US20060215956A1

公开(公告)日：2006-09-28

申请号：US11444428

申请日：2006-06-01

申请人： Jingo Adachi ,  Akihiro Itoh ,  Shinichi Wakabayashi

发明人： Jingo Adachi ,  Akihiro Itoh ,  Shinichi Wakabayashi

IPC分类号： G02B6/26

CPC分类号： H04J14/005

摘要： An encoder according to the present invention is an encoder for encoding an optical wavelength-multiplexed signal compliant with optical CDMA into a code having a code pattern, including: L optical fibers 36 and 42 (where L is an integer equal to or greater than two) each having a plurality of gratings 37 to 47; and a circulator 52 for coupling the plurality of optical fibers 36 and 42. The code pattern contains time bins t1 to t3. A plurality of wavelengths λ1, λ4 and λ5 are assigned to the time bin t1. If a sum of an optical path difference in each optical fiber from the grating which reflects the optical signal of the wavelength λ1 to the grating which reflects the optical signal of the wavelength λ4 is calculated for all of the optical fibers 36 and 42, the sum equals zero.

摘要翻译： 根据本发明的编码器是用于将符合光CDMA的光波分复用信号编码成具有码模式的编码器的编码器，包括：L光纤36和42（其中L是等于或大于2的整数 ），每个具有多个光栅37至47; 以及用于连接多根光纤36和42的循环器52。 代码图案包含时间段t 1到t 3。 将多个波长λ1，λ4和λ5分配给时间段t 1。 如果针对所有光纤36和42计算出反射波长λ4的光信号的反射波长λ1的光信号的光栅的每个光纤与光栅的光程差的和， 总和等于零。

公开(公告)号：US07050676B2

公开(公告)日：2006-05-23

申请号：US11262954

申请日：2005-11-01

申请人： Jingo Adachi ,  Shinichi Wakabayashi ,  Akihiro Itoh

发明人： Jingo Adachi ,  Shinichi Wakabayashi ,  Akihiro Itoh

IPC分类号： G02B6/34 ,  H04J14/00

CPC分类号： H04J14/005 ,  G02B6/02204 ,  G02B6/2932 ,  H04J14/0227 ,  H04J14/0241

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20060056764A1

公开(公告)日：2006-03-16

申请号：US11262954

申请日：2005-11-01

申请人： Jingo Adachi ,  Shinichi Wakabayashi ,  Akihiro Itoh

发明人： Jingo Adachi ,  Shinichi Wakabayashi ,  Akihiro Itoh

IPC分类号： G02B6/34

CPC分类号： H04J14/005 ,  G02B6/02204 ,  G02B6/2932 ,  H04J14/0227 ,  H04J14/0241

摘要： 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.

公开(公告)号：US07251397B2

公开(公告)日：2007-07-31

申请号：US11444428

申请日：2006-06-01

申请人： Jingo Adachi ,  Akihiro Itoh ,  Shinichi Wakabayashi

发明人： Jingo Adachi ,  Akihiro Itoh ,  Shinichi Wakabayashi

IPC分类号： G02B6/34 ,  G02B6/12 ,  G02F1/295

CPC分类号： H04J14/005

摘要： An encoder according to the present invention is an encoder for encoding an optical wavelength-multiplexed signal compliant with optical CDMA into a code having a code pattern, including: L optical fibers 36 and 42 (where L is an integer equal to or greater than two) each having a plurality of gratings 37 to 47; and a circulator 52 for coupling the plurality of optical fibers 36 and 42. The code pattern contains time bins t1 to t3. A plurality of wavelengths λ1, λ4 and λ5 are assigned to the time bin t1. If a sum of an optical path difference in each optical fiber from the grating which reflects the optical signal of the wavelength λ1 to the grating which reflects the optical signal of the wavelength λ4 is calculated for all of the optical fibers 36 and 42, the sum equals zero.

摘要翻译： 根据本发明的编码器是用于将符合光CDMA的光波分复用信号编码成具有码模式的编码器的编码器，包括：L光纤36和42（其中L是等于或大于2的整数 ），每个具有多个光栅37至47; 以及用于连接多根光纤36和42的循环器52。 代码图案包含时间段t 1到t 3。 将多个波长λ1，λ4和λ5分配给时间段t 1。 如果针对所有光纤36和42计算出反射波长λ4的光信号的反射波长λ1的光信号的光栅的每个光纤与光栅的光程差的和， 总和等于零。