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11.发明授权
公开(公告)号：US5636046A
公开(公告)日：1997-06-03
申请号：US425616
申请日：1995-04-20
IPC分类号： H04J14/00 , G02B6/34 , H04B10/2507 , H04B10/2525 , H04B10/255 , H04B10/2563 , H04B10/299 , H04J14/02 , H04B10/00
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04J14/0224 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02
摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength .lambda..sub.0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.
摘要翻译： 本发明提供一种光波长多路复用传输方法，其中使用光纤零色散波长附近的频带，并且将光信号设置在影响频带，波长色散和四波混频的有效信道间隔处 考虑到实现不受FWM串扰影响的增加容量的光通信系统。 当使用光纤复用并发送具有不同波长的多个信道的光信号时，设置包括光纤的零色散波长λ0的预定带宽的四波混频抑制保护带，并且信号 要复用的多个信道的光波被布置在保护带外部的较短波长侧和较长波长侧中的一个上。
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12.发明授权
公开(公告)号：US5602666A
公开(公告)日：1997-02-11
申请号：US425573
申请日：1995-04-20
IPC分类号： H04J14/00 , G02B6/34 , H04B10/2507 , H04B10/2525 , H04B10/255 , H04B10/2563 , H04B10/299 , H04J14/02 , H04B10/00
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04J14/0224 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02
摘要： An optical wavelength multiplex transmission method uses a band around a zero dispersion wavelength of an optical fiber to compensate for waveform degradation, which is produced by a synergetic effect of self phase modulation and chromatic dispersion, to increase transmission distance and transmission rate in optical systems. The optical dispersion compensation method is performed in an optical system including a transmitter, a repeater and a receiver, which collectively transmit and receive optical information along the optical fiber. Light is transmitted within a transmissible band which is defined by an allowable dispersion value determined from a synergetic effect of self phase modulation and group velocity dispersion in the optical fiber. The transmissible band is set on a shorter wavelength side than a shorter wavelength end .lambda..theta.-.DELTA..lambda..theta. or on a longer wavelength side than a longer wavelength end .lambda..theta.+.DELTA..lambda..theta. of the zero-dispersion wavelength deviation range of the optical fiber. The zero dispersion wavelength .DELTA..theta. of the optical fiber is shifted to apparently arrange the signal light into the transmissible band to compensate for the dispersion amount of the optical transmission system.
摘要翻译： 光波长复用传输方法使用光纤的零色散波长附近的频带来补偿由自相位调制和色散的协同效应产生的波形劣化，以增加光学系统中的传输距离和传输速率。 光学色散补偿方法在包括发射机，中继器和接收机的光学系统中执行，该光学系统共同地沿光纤发送和接收光学信息。 光在透射带内传输，其由通过光纤中的自相位调制和群速度色散的协同效应确定的容许色散值限定。 透射带设置在比较短波长端λθ-ΔTATAθ较短的波长侧，或者在比光纤的零色散波长偏差范围的较长波长端λθ+ΔTATAλθ更长的波长侧 。 光纤的零色散波长DELTAθ被移位以将信号光明显地布置在透射频带中，以补偿光传输系统的色散量。
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公开(公告)号：US20050169633A1
公开(公告)日：2005-08-04
申请号：US11082958
申请日：2005-03-18
申请人： Goji Nakagawa , Hideyuki Miyata , Yutaka Kai , Hiroshi Onaka , Setsuo Yoshida , Kyosuke Sone , Tomohiro Ueno
发明人： Goji Nakagawa , Hideyuki Miyata , Yutaka Kai , Hiroshi Onaka , Setsuo Yoshida , Kyosuke Sone , Tomohiro Ueno
IPC分类号： H04B10/27 , G02F1/125 , H01L31/12 , H01S5/0687 , H04B10/07 , H04B10/275 , H04B10/29 , H04J14/00 , H04J14/02
CPC分类号： H04B10/572 , H04J14/0204 , H04J14/0209 , H04J14/021 , H04J14/0213 , H04J14/022 , H04J14/0227
摘要： An optical transmission device improved in quality and reliability of OADM function and permitting configuration of highly-flexible, economical OADM networks. A wavelength tunable filter variably selects a wavelength according to a control frequency. A filter controller applies the control frequency to the filter while scanning wavelength over an entire signal bandwidth, to detect, from a reference wavelength monitor signal supplied thereto, a reference control frequency which permits the filter to select a reference wavelength and according to which wavelength is matched. On receiving a wavelength selection request, the controller obtains a target control frequency from the reference control frequency and the position of a target wavelength relative to the reference wavelength, and applies the obtained frequency to the filter. A reference wavelength filter transmits the reference wavelength therethrough. A light-receiving element monitors the transmitted reference wavelength to generate the monitor signal.
摘要翻译： 一种光传输设备改进了OADM功能的质量和可靠性，并允许配置高度灵活，经济的OADM网络。 波长可调滤波器根据控制频率可变地选择波长。 滤波器控制器在整个信号带宽上扫描波长时将滤波器的控制频率施加到滤波器，从提供给其的参考波长监测信号中检测出允许滤波器选择参考波长的参考控制频率，根据哪个波长是 匹配。 在接收到波长选择请求时，控制器从参考控制频率和目标波长相对于参考波长的位置获得目标控制频率，并将获得的频率应用于滤波器。 参考波长滤波器透过参考波长。 光接收元件监测发射的参考波长以产生监测信号。
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公开(公告)号：US06782017B1
公开(公告)日：2004-08-24
申请号：US09560151
申请日：2000-04-28
申请人： Yutaka Kai , Hideyuki Miyata , Hiroshi Onaka
发明人： Yutaka Kai , Hideyuki Miyata , Hiroshi Onaka
IPC分类号： H01S313
CPC分类号： H04B10/572 , H01S5/0078 , H01S5/0687 , H04B10/506
摘要： An object of the invention is to provide a wavelength locker which has a wider locking range than that of the wavelength locker in the prior art and which can cope with a plurality of wavelengths. The aforementioned objects are achieved by a wavelength locker, which comprises a periodic filter, a detecting part for detecting the intensity of a laser beam through the periodic filter, and a controlling part for controlling the wavelength of the laser beam to a desired wavelength in accordance with the output of the detecting part. In this wavelength locker, the FSR of the periodical filter is controlled according to space between the wavelengths, and refers to the number of wavelength to be locked, so that the characteristics corresponding to output wavelengths that vary in every period twice the space of wavelengths and are complementary to each other, can be obtained, and the locking range will become wider.
摘要翻译： 本发明的目的是提供一种具有比现有技术中的波长锁定器更宽的锁定范围并且可以应付多个波长的波长锁定器。 上述目的通过一种波长锁定器实现，该波长锁定器包括周期滤波器，用于检测通过周期滤波器的激光束的强度的检测部分，以及用于将激光束的波长控制为所需波长的控制部分 与检测部分的输出。 在该波长锁定器中，周期滤波器的FSR根据波长之间的空间来控制，并且是指要锁定的波长的数量，使得对应于输出波长的特性在每个周期中变化是波长空间的两倍， 互补，可以获得，锁定范围将变宽。
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15.发明授权公开(公告)号：US06252688B1
公开(公告)日：2001-06-26
申请号：US09438147
申请日：1999-11-10
IPC分类号： H04J1402
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02 , H04J14/0224
摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.
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16.发明授权公开(公告)号：US06252687B1
公开(公告)日：2001-06-26
申请号：US09066580
申请日：1998-04-27
IPC分类号： H04J1402
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02 , H04J14/0224
摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.
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17.发明授权公开(公告)号：US06384943B2
公开(公告)日：2002-05-07
申请号：US09797866
申请日：2001-03-05
IPC分类号： H04J1402
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02 , H04J14/0224
摘要： An optical transmission system in which a wavelength-division-multiplexed (WDM) optical signal including a plurality of optical signals having different wavelengths is demultiplexed into first optical signals and second optical signals. The second optical signals have wavelengths longer than wavelengths of the first optical signals. A first dispersion compensator compensates dispersion of the first optical signals. A second dispersion compensator compensates dispersion of the second optical signals. The dispersion compensated first and second optical signals are then multiplied together.
摘要翻译： 一种光传输系统，其中包括具有不同波长的多个光信号的波分复用（WDM）光信号被解复用为第一光信号和第二光信号。 第二光信号具有比第一光信号的波长长的波长。 第一色散补偿器补偿第一光信号的色散。 第二色散补偿器补偿第二光信号的色散。 然后将色散补偿的第一和第二光信号相乘。
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18.发明授权公开(公告)号：US06275314B1
公开(公告)日：2001-08-14
申请号：US09066860
申请日：1998-04-27
IPC分类号： H04J1402
CPC分类号： G02B6/29377 , G02B6/4215 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , H04B2210/252 , H04B2210/254 , H04B2210/258 , H04J14/02 , H04J14/0224
摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.
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19.发明授权
公开(公告)号：US5886804A
公开(公告)日：1999-03-23
申请号：US627722
申请日：1996-04-01
申请人： Hiroshi Onaka , Hideyuki Miyata , Kazue Otsuka
发明人： Hiroshi Onaka , Hideyuki Miyata , Kazue Otsuka
IPC分类号： G02F2/00 , H04B10/2507 , H04B10/2525 , H04B10/2557 , H04B10/54 , H04B10/548 , H04B10/58 , H04B10/00
CPC分类号： H04B10/2525 , H04B2210/256
摘要： In an optical transmission system for intensively modulating an optical wavelength with a sending signal to be transmitted and optically amplifying a modulated optical signal, a wavelength dispersion characteristic of a single mode optical transmission line can be suitably compensated. The optical transmission system comprises a modulating circuit for modulating optical phases or frequencies of the optical wavelength with the sending signal to set a chirping parameter .alpha. to -0.65 to -1.3, and outputting an modulated signal; an optical transmission line having wavelength residual dispersion value of 16 to 21 ps/nm/Km for transmitting the modulated signal; and a dispersion compensating circuit for compensating wavelength dispersion value, of the optical transmission line, which is set to approximately +500 to +1200 ps/nm when an input optical power is more than -5 dBm.
摘要翻译： 在利用要发送的发送信号和光学放大调制的光信号来集中调制光波长的光传输系统中，可以适当地补偿单模光传输线的波长色散特性。 光传输系统包括调制电路，用于利用发送信号调制光学相位或光波长的频率，以将啁啾参数α设置为-0.65至-1.3，并输出调制信号; 具有用于发送调制信号的波长残留色散值为16〜21ps / nm / Km的光传输线路; 以及用于补偿光传输线的波长色散值的色散补偿电路，当输入光功率大于-5dBm时，其被设置为大约+500至+1200ps / nm。
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20.发明授权
公开(公告)号：US5696859A
公开(公告)日：1997-12-09
申请号：US534726
申请日：1995-09-27
IPC分类号： G02B6/12 , G02B6/34 , H01S5/0687 , H01S5/40 , H04B10/00 , H04B10/079 , H04B10/25 , H04B10/2507 , H04B10/54 , H04B10/548 , H04B10/564 , G02B6/293
CPC分类号： G02B6/2937 , G02B6/12007 , G02B6/29317 , G02B6/29352 , G02B6/29362 , G02B6/29395 , G02B6/4246 , H04B10/503 , H04B10/506 , G02B2006/12107 , G02B2006/12109 , G02B2006/12164 , H01S5/0687 , H01S5/4025 , H01S5/4087
摘要： An optical transmitter provided by the present invention comprises: a light source; a band-pass filter for filtering a light generated by the light source; a light splitting means for splitting a light output by the band-pass filter into at least two split lights; an optical receiving unit for converting one of the split lights into an electrical signal having a level proportional to the intensity of the split light; and a control means for receiving the electrical signal for use in controlling the wavelength of the light source so as to sustain the intensity of the split light at a fixed value. With the configuration described above, fluctuations in wavelength occurring on the transmitter side can be reduced. On the top of that, by applying this optical transmitter to a WDM system, a system cold start can be done with ease.
摘要翻译： 本发明提供的光发射机包括：光源; 用于对由光源产生的光进行滤波的带通滤波器; 分光装置，用于将由带通滤光器输出的光分成至少两个分光; 光接收单元，用于将分光中的一个转换成具有与分光的强度成比例的电平的电信号; 以及控制装置，用于接收用于控制光源的波长的电信号，以将分裂光的强度维持在固定值。 利用上述配置，可以减少在发送器侧发生的波长波动。 最重要的是，通过将该光发射机应用于WDM系统，可以轻松完成系统冷启动。
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