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1. 发明授权

US08705680B2 CDR circuit 失效
标题翻译： CDR电路
公开(公告)号：US08705680B2
公开(公告)日：2014-04-22
申请号：US12308503
申请日：2007-06-27
申请人： Jun Terada , Yusuke Ohtomo , Kazuyoshi Nishimura , Tomoaki Kawamura , Minoru Togashi , Keiji Kishine
发明人： Jun Terada , Yusuke Ohtomo , Kazuyoshi Nishimura , Tomoaki Kawamura , Minoru Togashi , Keiji Kishine
IPC分类号： H03D3/24
CPC分类号： H04J3/0632 , H03L7/0805 , H03L7/0807 , H03L7/093
摘要： A recovered clock (123) is generated by making the phase of a reference clock (122) having the same frequency as the data rate frequency of input data (120) match the phase of the input data (120). The input data (120) is written in a FIFO (101) using the recovered clock (123). For readout from the FIFO (101), the FIFO (101) is caused to output recovered data (121) using the reference clock (122) asynchronous to the recovered clock (123).
摘要翻译：通过使具有与输入数据（120）的数据速率频率相同频率的参考时钟（122）的相位与输入数据（120）的相位相匹配来产生恢复时钟（123）。使用恢复时钟（123）将输入数据（120）写入FIFO（101）。为了从FIFO（101）读出，使得FIFO（101）使用与恢复时钟（123）异步的参考时钟（122）输出恢复的数据（121）。

2. 发明申请

US20100294002A1 OPTICAL FIBER PREFORM MANUFACTURING METHOD 审中-公开
标题翻译：光纤预制件制造方法
公开(公告)号：US20100294002A1
公开(公告)日：2010-11-25
申请号：US12780347
申请日：2010-05-14
申请人： Masahide ITO , Jun TERADA , Shinji YOKOYAMA , Mitsuhiro KAWASAKI
发明人： Masahide ITO , Jun TERADA , Shinji YOKOYAMA , Mitsuhiro KAWASAKI
IPC分类号： C03B37/01
CPC分类号： C03B37/01446
摘要： The present invention provides a method for manufacturing an optical fiber preform, which provides an optical fiber with stable transmission loss characteristics, and improves manufacturing efficiency. The method for manufacturing an optical fiber preform comprises dehydrating the optical fiber soot preform by lowering the optical fiber soot preform within the muffle tube and passing through a heating region, pulling up the dehydrated optical fiber soot preform to the predetermined position, and sintering the optical fiber soot preform by lowering the optical fiber soot preform again within the muffle tube and passing through the heating region where temperature of the heating region is higher than temperature of the heating region in dehydrating; wherein A≦B is satisfied where A is pull-up speed (mm/minute) of the optical fiber soot preform during the pulling up and B is gas flow rate (mm/minute) within the muffle tube at room temperature during the pulling up. Furthermore, 1.5×A≦B is satisfied.
摘要翻译：本发明提供一种光纤预制棒的制造方法，其提供具有稳定的传输损耗特性的光纤，并提高制造效率。制造光纤预制棒的方法包括：通过将马弗管内的光纤烟灰预制件下降并通过加热区域，将脱水的光纤烟灰预制件拉出到预定位置，并将光学玻璃烧结通过在马弗管内再次降低光纤烟灰预制件并通过加热区域的温度高于脱水加热区域的温度的加热区域，其中A＆NlE; B满足拉伸时光纤烟灰预成型件的上拉速度（mm /分钟），B为升温期间室温下马弗管内的气体流量（mm /分钟）。此外，满足1.5×A＆nlE; B。

3. 发明授权

US08149978B2 Clock/data recovery circuit 有权
标题翻译：时钟/数据恢复电路
公开(公告)号：US08149978B2
公开(公告)日：2012-04-03
申请号：US12526339
申请日：2007-07-20
申请人： Yusuke Ohtomo , Jun Terada , Kazuyoshi Nishimura , Keiji Kishine
发明人： Yusuke Ohtomo , Jun Terada , Kazuyoshi Nishimura , Keiji Kishine
IPC分类号： H03D3/24 , H03K3/017
CPC分类号： H04L7/033 , H03K5/06 , H04L7/0083 , H04L7/0087
摘要： A clock/data recovery circuit includes a data duty correction circuit which outputs corrected data by correcting the duty of input data in accordance with the level of a correction signal, a clock recovery circuit which generates a recovered clock in synchronism with the edge timing of the corrected data, a data decision circuit which performs data decision of the corrected data based on the recovered clock, and a data duty detection circuit which detects the duty of the corrected data based on the recovered clock and outputs the correction signal representing a duty correction amount to the data duty correction circuit.
摘要翻译：时钟/数据恢复电路包括数据占空比校正电路，其通过根据校正信号的电平校正输入数据的占空比来输出校正数据;时钟恢复电路，与时钟/数据恢复电路的边沿定时同步地产生恢复时钟校正数据，基于恢复的时钟执行校正数据的数据判定的数据判定电路;以及数据占空比检测电路，其基于恢复的时钟检测校正数据的占空比，并输出表示占空比校正量的校正信号到数据占空比校正电路。

4. 发明申请

US20100232558A1 CDR circuit 失效
标题翻译： CDR电路
公开(公告)号：US20100232558A1
公开(公告)日：2010-09-16
申请号：US12308503
申请日：2007-06-27
申请人： Jun Terada , Yusuke Ohtomo , Kazuyoshi Nishimura , Tomoaki Kawamura , Minoru Togashi , Keiji Kishine
发明人： Jun Terada , Yusuke Ohtomo , Kazuyoshi Nishimura , Tomoaki Kawamura , Minoru Togashi , Keiji Kishine
IPC分类号： H04L7/00
CPC分类号： H04J3/0632 , H03L7/0805 , H03L7/0807 , H03L7/093
摘要： A recovered clock (123) is generated by making the phase of a reference clock (122) having the same frequency as the data rate frequency of input data (120) match the phase of the input data (120). The input data (120) is written in a FIFO (101) using the recovered clock (123). For readout from the FIFO (101), the FIFO (101) is caused to output recovered data (121) using the reference clock (122) asynchronous to the recovered clock (123).
摘要翻译：通过使具有与输入数据（120）的数据速率频率相同频率的参考时钟（122）的相位与输入数据（120）的相位相匹配来产生恢复时钟（123）。使用恢复时钟（123）将输入数据（120）写入FIFO（101）。为了从FIFO（101）读出，使得FIFO（101）使用与恢复时钟（123）异步的参考时钟（122）输出恢复的数据（121）。

5. 发明申请

US20100073058A1 CLOCK/DATA RECOVERY CIRCUIT 有权
标题翻译：时钟/数据恢复电路
公开(公告)号：US20100073058A1
公开(公告)日：2010-03-25
申请号：US12526339
申请日：2007-07-20
申请人： Yusuke Ohtomo , Jun Terada , Kazuyoshi Nishimura , Keiji Kishine
发明人： Yusuke Ohtomo , Jun Terada , Kazuyoshi Nishimura , Keiji Kishine
IPC分类号： H03K3/017
CPC分类号： H04L7/033 , H03K5/06 , H04L7/0083 , H04L7/0087
摘要： A clock/data recovery circuit includes a data duty correction circuit (400) which outputs corrected data by correcting the duty of input data in accordance with the level of a correction signal, a clock recovery circuit (100) which generates a recovered clock in synchronism with the edge timing of the corrected data, a data decision circuit (200) which performs data decision of the corrected data based on the recovered clock, and a data duty detection circuit (300) which detects the duty of the corrected data based on the recovered clock and outputs the correction signal representing a duty correction amount to the data duty correction circuit.
摘要翻译：时钟/数据恢复电路包括数据占空比校正电路（400），其通过根据校正信号的电平校正输入数据的占空比来输出校正数据;同步产生恢复时钟的时钟恢复电路（100）利用校正数据的边缘定时，基于恢复时钟执行校正数据的数据判定的数据判定电路（200），以及数据占空比检测电路（300），其基于该校正数据检测校正数据的占空比恢复时钟，并将表示占空比校正量的校正信号输出到数据占空比校正电路。

6. 发明授权

US06766089B2 Low-dispersion optical fiber and optical transmission system using the low-dispersion optical fiber 失效
标题翻译：低色散光纤和光传输系统采用低色散光纤
公开(公告)号：US06766089B2
公开(公告)日：2004-07-20
申请号：US10662341
申请日：2003-09-16
申请人： Shinichi Arai , Ryuichi Sugizaki , Keiichi Aiso , Naoto Oyama , Jun Terada , Hisashi Koaizawa , Katsunori Inoue
发明人： Shinichi Arai , Ryuichi Sugizaki , Keiichi Aiso , Naoto Oyama , Jun Terada , Hisashi Koaizawa , Katsunori Inoue
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02014 , G02B6/02242 , G02B6/02257 , G02B6/02261 , G02B6/02271 , G02B6/0228 , G02B6/0286 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/03666
摘要： A low-dispersion optical fiber provides both reduced chromatic dispersion in a used wavelength band and increased effective core area. The low-dispersion optical fiber is made by covering a center core (1) with a first side core (2), covering the first side core (2) with a second side core (3), and covering the second side core (3) with a cladding (5). When the maximum refractive index of the center core (1) is written n1, the minimum refractive index of the first side core (2) is written n2, the maximum refractive index of the second side core (3) is written n3 and the refractive index of the cladding (5) is written nc, then n1>n3>nc>n2 is satisfied. Relative refractive index differences &Dgr;1, &Dgr;2 and &Dgr;3 with respect to the cladding (5) of the maximum refractive index of the center core (1), the minimum refractive index of the first side core (2) and the maximum refractive index of the second side core (3) respectively are made 0.4%≦&Dgr;1≦0.7%, −0.30%≦&Dgr;2≦−0.05% and 0.2%≦&Dgr;3.
摘要翻译：低色散光纤在使用的波长带中提供减少的色散并增加有效核心区域。低分散光纤通过用第一侧芯（2）覆盖中心芯（1），用第二侧芯（3）覆盖第一侧芯（2）并覆盖第二侧芯（3））与包层（5）。当中心芯（1）的最大折射率被写入n1时，第一侧芯（2）的最小折射率被写为n2，第二侧芯（3）的最大折射率被写为n3，折射率将包层（5）的折射率写入nc，则满足n1> n3> nc> n2。相对于中心纤芯（1）的最大折射率的包层（5），第一侧芯（2）的最小折射率和第二侧芯的最大折射率的相对折射率差Δ1，Delta2和Delta3 侧芯（3）分别为0.4％<=Δ1<= 0.7％，-0.30％<=Δ2≤0.05％和0.2％<= DELTA3。

7. 发明授权

US06684018B2 Low-dispersion optical fiber and optical transmission system using the low-dispersion optical fiber 有权
标题翻译：低色散光纤和光传输系统采用低色散光纤
公开(公告)号：US06684018B2
公开(公告)日：2004-01-27
申请号：US09983616
申请日：2001-10-25
申请人： Shinichi Arai , Ryuichi Sugizaki , Keiichi Aiso , Naoto Oyama , Jun Terada , Hisashi Koaizawa , Katsunori Inoue
发明人： Shinichi Arai , Ryuichi Sugizaki , Keiichi Aiso , Naoto Oyama , Jun Terada , Hisashi Koaizawa , Katsunori Inoue
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02014 , G02B6/02242 , G02B6/02257 , G02B6/02261 , G02B6/02271 , G02B6/0228 , G02B6/0286 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/03666
摘要： A low-dispersion optical fiber provides both reduced chromatic dispersion in a used wavelength band and increased effective core area. The low-dispersion optical fiber is made by covering a center core (1) with a first side core (2), covering the first side core (2) with a second side core (3), and covering the second side core (3) with a cladding (5). When the maximum refractive index of the center core (1) is written n1, the minimum refractive index of the first side core (2) is written n2, the maximum refractive index of the second side core (3) is written n3 and the refractive index of the cladding (5) is written nc, then n1>n3>nc>n2 is satisfied. Relative refractive index differences &Dgr;1, &Dgr;2 and &Dgr;3 with respect to the cladding (5) of the maximum refractive index of the center core (1), the minimum refractive index of the first side core (2) and the maximum refractive index of the second side core (3) respectively are made 0.4%≦&Dgr;1≧0.7%, −0.30%≦&Dgr;2≦−0.05% and 0.2%≦&Dgr;3.
摘要翻译：低色散光纤在使用的波长带中提供减少的色散并增加有效核心区域。低分散光纤通过用第一侧芯（2）覆盖中心芯（1），用第二侧芯（3）覆盖第一侧芯（2）并覆盖第二侧芯（3））与包层（5）。当中心芯（1）的最大折射率被写入n1时，第一侧芯（2）的最小折射率被写为n2，第二侧芯（3）的最大折射率被写为n3，折射率将包层（5）的折射率写入nc，则满足n1> n3> nc> n2。相对于中心纤芯（1）的最大折射率的包层（5），第一侧芯（2）的最小折射率和第二侧芯的最大折射率的相对折射率差Δ1，Delta2和Delta3 侧芯（3）分别为0.4％<=Δ1> = 0.7％，-0.30％<=Δ2≤0.05％和0.2％<= DELTA3。

8. 发明授权

US5666454A Preform for optical fiber and method of producing optical fiber 失效
标题翻译：光纤预制件和光纤制造方法
公开(公告)号：US5666454A
公开(公告)日：1997-09-09
申请号：US569163
申请日：1996-04-16
申请人： Jun Terada , Hideaki Chiba , Mituhiro Kawasaki , Tadashi Takahashi
发明人： Jun Terada , Hideaki Chiba , Mituhiro Kawasaki , Tadashi Takahashi
IPC分类号： C03B37/014 , C03B37/075 , G02B6/02 , C03B37/023
CPC分类号： G02B6/02276 , C03B37/01486 , C03B37/075 , G02B6/02004 , G02B6/03633 , C03B2203/24 , C03B2203/36
摘要： A single-mode optical fiber preform is produced by a process where a porous glass body of a core rod for a single-mode optical fiber is dehydrated and made into a glass to prepare a core rod for the optical fiber, clad layers are deposited on the circumference of the core rod for the optical fiber so as to give an outer diameter of a desired value, and then these are dehydrated and made into glass. At this time, the diameter of a part corresponding to the core rod for the optical fiber in the optical fiber obtained by drawing the preform for optical fiber is controlled to 1.9 times or more the mode field diameter, which is a diameter that allows light having a wavelength of 1.55 .mu.m to pass therethrough. As a result, a preform for a single-mode optical fiber with which an optical fiber little influenced by defects can be obtained can be produced.
摘要翻译： PCT No.PCT / JP95 / 00814 Sec。 371日期1996年04月16日 102（e）日期1996年4月16日PCT提交1995年4月25日PCT公布。出版物WO95 / 29132 日期：1995年11月2日单模光纤预制棒是通过将用于单模光纤的芯棒的多孔玻璃体脱水并制成玻璃以制备光纤芯棒的方法制造的，包覆层沉积在用于光纤的芯棒的圆周上，以得到所需值的外径，然后将它们脱水并制成玻璃。此时，通过将用于光纤的预成型件拉制而获得的光纤中的光纤芯棒的对应部分的直径被控制为模场直径的1.9倍以上，该直径使得具有波长为1.55μm，通过。结果，可以获得能够获得少量受缺陷影响的光纤的单模光纤的预成型体。

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