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公开(公告)号：US5539557A
公开(公告)日：1996-07-23
申请号：US343528
申请日：1994-11-17
IPC分类号： H04J14/00 , H04B10/07 , H04B10/077 , H04B10/2507 , H04B10/29 , H04J14/04 , H04J14/06 , H04B10/08
CPC分类号： H04B10/0777 , H04B2210/074 , H04B2210/078
摘要： At the time of receiving a repeater supervisory signal superimposed on or combined by wavelength multiplexing with a main optical signal in an optical amplifier repeater system, the received optical signal is subjected to a photoelectric conversion by a photodetector and then branched into two electric signals, the one of which is subjected to equalizing amplification, timing extraction and discrimination and regeneration to extract only the main signal component. The main signal component thus extracted and the main signal contained in the other electric signal, which is not regenerated, are respectively subjected to required equalization, delay adjustment and amplitude adjustment so that they match with one another in waveform, phase and amplitude. In addition, the amplitude adjustment of the main signal is automatically controlled. By differentially combining these signals to remove only the main signal component to minimize its residual value, thereby extracting the supervisory signal to be obtained.
摘要翻译： PCT No.PCT / JP94 / 00653 Sec。 371日期：1994年11月17日 102（e）1994年11月17日PCT PCT 1994年4月20日PCT公布。 公开号WO94 / 24779 日期1994年10月27日在光学放大器中继器系统中接收到与主光信号叠加或组合在一起的中继器监视信号的时间，接收的光信号经受光电检测器的光电转换，然后分支成 两个电信号，其中一个经受均衡放大，定时提取和鉴别和再生以仅提取主信号分量。 如此提取的主信号分量和未再生的另一电信号中所包含的主信号分别经受所需的均衡，延迟调整和振幅调整，使得它们在波形，相位和幅度上彼此匹配。 另外，主信号的幅度调整也被自动控制。 通过差分地组合这些信号以仅去除主信号分量以最小化其残留值，从而提取要获得的监控信号。
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公开(公告)号：US06614588B1
公开(公告)日：2003-09-02
申请号：US09725288
申请日：2000-11-29
申请人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
发明人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H01S300
CPC分类号： H04B10/29 , H04B10/2918 , H04B10/808
摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.
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公开(公告)号：US5898714A
公开(公告)日：1999-04-27
申请号：US783589
申请日：1997-01-13
IPC分类号： G02F1/35 , H01S3/30 , H04B10/2507 , H04B10/2525 , H04B10/29 , H04B10/293 , H04B10/508 , H04B10/524
CPC分类号： H01S3/302 , H01S2301/085
摘要： An optical pulse generator, capable of generating ultrashort optical pulses suitable for optical soliton transmission, includes a DFB laser 10 for continuous laser oscillation, an electroabsorbtion modulator 12 for creating a sequence of optical pulses of the pulse width 14.6 ps from optical output of the laser 10. Output from an optical modulator 12 enters into a dispersion decreasing fiber 16 via an optical isolator 14. The dispersion decreasing fiber 16 has chromatic dispersion that decreases from 13.7 ps/nm/km to 2.3 ps/nm/km with distance, and its fiber length is 15 km. Pump laser beams from pump lasers 20, 24 are introduced to the dispersion decreasing fiber 16 by optical couplers 18, 22, and the fiber 16 functions as a Raman amplifier. When the Raman gain is 2.4 dB, the pulse width is compressed from 14.6 ps to 5.8 ps, approximately, even when the power of input pulses to the dispersion decreasing fiber 16 complies with the soliton condition.
摘要翻译： 能够产生适用于光孤子传输的超短光脉冲的光脉冲发生器包括用于连续激光振荡的DFB激光器10，用于从激光器的光输出产生脉冲宽度为14.6ps的光脉冲序列的电吸收调制器12 来自光调制器12的输出经由光隔离器14进入色散减小的光纤16.色散减小光纤16具有从距离13.7ps / nm / km降低到2.3ps / nm / km的色散，并且其色散 纤维长度为15公里。 来自泵浦激光器20,24的泵浦激光束通过光耦合器18,22引入到色散减小光纤16，并且光纤16用作拉曼放大器。 当拉曼增益为2.4dB时，即使当色散减小的光纤16的输入脉冲的功率符合孤子条件时，脉冲宽度也从大约14.6ps压缩到5.8ps。
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公开(公告)号：US5790294A
公开(公告)日：1998-08-04
申请号：US617615
申请日：1996-03-19
申请人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
发明人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B3/46 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/16 , H04B10/2563 , H04B10/29 , H04B10/294 , H04B10/297 , H04B10/54 , H04B10/548 , H04B10/564 , H04B10/572 , H04J14/02 , H04B10/02
CPC分类号： H04B10/035 , H04B10/07 , H04B10/077 , H04B2210/074 , H04B2210/077 , H04B2210/078
摘要： A line monitoring apparatus which features a simple configuration is capable of quickly detecting a position where a failure has occurred. A main track signal on an up-stream optical transmission path is set for a different wavelength from that on a down-stream optical transmission path, so that the wavelength of loopback signals fed back from repeaters does not overlap the wavelength of the main track signals transmitted from a transmitting terminal station. This makes it possible to separate the main track signals and the loopback signals by using dividing circuits at receiving terminal stations. In addition, the level of the separated loopback signals can be set higher than that in the past; therefore, a monitoring signal can be quickly detected in the loopback signal.
摘要翻译： 具有简单配置的线路监视装置能够快速检测发生故障的位置。 上游光传输路径上的主轨道信号被设置为与下行光传输路径上不同的波长，使得从中继器反馈的环回信号的波长不与主轨道信号的波长重叠 从发送终端发送。 这使得可以通过在接收终端站处使用分频电路来分离主轨道信号和环回信号。 另外，分离的环回信号的电平可以设置得比以前更高; 因此，可以在环回信号中快速检测出监视信号。
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公开(公告)号：US06188508B1
公开(公告)日：2001-02-13
申请号：US09324395
申请日：1999-06-03
IPC分类号： H01S300
CPC分类号： H04B10/2916 , H04B10/0775 , H04B10/0777 , H04B2210/074 , H04B2210/078
摘要： A control signal superimposer for superimposing a control signal on a signal light, comprising a pumping light source for generating a pumping light with intensity fluctuation in accordance with the control signal; a Raman amplification medium pumped by the pumping light from the pumping light source for Raman-amplifying the signal light; a combiner for combining the pumping light output from the pumping light source and the signal light to be Raman-amplified and then supplying them to the Raman amplification medium; and an optical filter for extracting the signal light component from the output light of the Raman amplification medium and terminating the pumping light component.
摘要翻译： 一种用于将控制信号叠加在信号光上的控制信号叠加器，包括用于根据控制信号产生强度波动的泵浦光的泵浦光源; 由来自泵浦光源的泵浦光泵浦拉曼放大信号光的拉曼放大介质; 组合器，用于将从泵浦光源输出的泵浦光与要拉曼放大的信号光组合，然后将其提供给拉曼放大介质; 以及用于从拉曼放大介质的输出光提取信号光分量并终止泵浦光分量的滤光器。
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36.发明授权
公开(公告)号：US6005702A
公开(公告)日：1999-12-21
申请号：US802698
申请日：1997-02-19
IPC分类号： G02F1/01 , H04B10/2507 , H04B10/2525 , H04B10/508 , H04B10/516 , H04B10/524 , H04B10/556 , H04B10/58 , H04B10/61 , H04J14/00 , H04J14/02 , H04L25/02 , H04L25/49 , H04B10/04 , H04B10/12
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/506 , H04B10/508 , H04J14/02
摘要： An optical transmission device using return-to-zero optical pulses as transmission optical pulses, which is capable of enhancing a transmission distance as well as a wavelength range with satisfactory transmission characteristics and enabling an easy realization of the wavelength division multiplexing optical transmission. The optical transmission device is formed by an optical transmitter for transmitting transmission optical pulses by superposing digital data signals onto return-to-zero optical pulses, and a modulator for applying one of a phase modulation and a frequency modulation in synchronization with a transmission rate of the transmission optical pulses, to the transmission optical pulses transmitted by the optical transmitter. This optical transmission device can be utilized in forming a wavelength division multiplexing optical transmission apparatus and an optical transmission system.
摘要翻译： 一种使用归零光脉冲作为传输光脉冲的光传输装置，其能够增强传输距离以及具有令人满意的传输特性的波长范围，并且能够容易地实现波分复用光传输。 光传输装置由光发射机形成，用于通过将数字数据信号叠加在归零光脉冲上来发送传输光脉冲;以及调制器，用于将相位调制和频率调制中的一个与传输速率 传输光脉冲，由光发送器传输的传输光脉冲。 该光传输装置可以用于形成波分复用光传输装置和光传输系统。
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37.发明授权
公开(公告)号：US5877878A
公开(公告)日：1999-03-02
申请号：US757290
申请日：1996-11-27
申请人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
发明人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B10/035 , H04B10/07 , H04B10/077 , H04B10/2507 , H04B10/29 , H04B10/297 , H04B10/54 , H04B10/548 , H04B10/572 , H04J14/02 , H04B10/02
CPC分类号： H04B10/0777 , H04B2210/078
摘要： The purpose of the invention is to detect a surveillance signal in a shorter time without lowering the usable merit of wavelength. The transmission signal transmitting through the optical fiber transmission lines is specified as a light FDM signal multiplexed in wavelength, and the surveillance light signal is interposed in the middle of two adjacent channel slots. The surveillance light signal is produced such that the spread spectrum is applied to the surveillance carrier and thereby a light signal is modulated in intensity. The light FDM signal and surveillance light signal are turned to the facing transmission lines in the optical repeaters to be received by each terminal station, and the modulation rate of the surveillance light signal can be made deeper so that the surveillance signal can be detected in a shorter time.
摘要翻译： 本发明的目的是在更短的时间内检测监视信号，而不降低波长的可用优点。 通过光纤传输线传输的传输信号被指定为以波长复用的光FDM信号，并且监视光信号插入在两个相邻信道时隙的中间。 产生监视光信号，使得扩频被应用于监视载体，从而强度调制光信号。 光FDM信号和监视光信号转到每个终端接收的光中继器中的面向传输线，并且可以使监视光信号的调制速率更深，从而可以在 时间较短
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公开(公告)号：US06867908B2
公开(公告)日：2005-03-15
申请号：US10401748
申请日：2003-03-31
申请人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
发明人： Aritomo Uemura , Kiwami Matsushita , Yukio Horiuchi , Masatoshi Suzuki , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H03F3/08 , H04B3/36 , H04B10/03 , H04B10/079 , H04B10/29 , H04B10/293 , H04B10/80 , H01S3/00
CPC分类号： H04B10/29 , H04B10/2918 , H04B10/808
摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.
摘要翻译： 根据本发明的光放大器被构造成使得通过电流检测装置首先检测馈送到馈电线2a的电流量，然后对每个旁路电路22和23产生设置信号 根据这样检测到的馈电电流量，然后分别由旁路电路22和23控制每个光中继器电路11和12的输出电平，使得这些中继器电路11和12的输出电平 可以根据馈送到馈电线2a的电流量进行控制。
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公开(公告)号：US6160649A
公开(公告)日：2000-12-12
申请号：US136720
申请日：1998-08-19
申请人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
发明人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B10/07 , H04B10/2507 , H04B10/54 , H04B10/548 , H04B17/00 , H04J14/02 , H04B10/08
CPC分类号： H04B10/07955 , H04B10/0775 , H04B10/0779 , H04B10/0799 , H04B2210/075 , H04B2210/078
摘要： An oscillator oscillates at a predetermined reference frequency, and a reference signal light sender generates light (reference signal light) of a specific wavelength deeply modulated by output from the oscillator. A frequency divider frequency-divides the output from the oscillator into a certain number, and outputs a tone signal of a predetermined measurement frequency. Output from the frequency divider is applied to selected one of a plurality of optical transmission signal senders via one of a plurality of switches, and is used to slightly intensity-modulate a corresponding optical transmission signal. An optical divider in an optical repeater outputs most of output light from an optical amplifier onto an optical fiber transmission line toward a terminal station, and applies small amounts of the light to a measuring circuit. The measuring circuit synchronously detects the measurement frequency component in the received light using the reference frequency obtained from the reference signal light of the specific wavelength. A modulator slightly varies the amplification gain of the other optical amplifier that amplifies the signal light travelling on the other optical fiber transmission line in response to results of measurement by the measuring circuit.
摘要翻译： 振荡器以预定的参考频率振荡，并且参考信号光发送器产生由振荡器的输出深度调制的特定波长的光（参考信号光）。 分频器将振荡器的输出分频为一定数量，并输出预定测量频率的音调信号。 来自分频器的输出经由多个开关中的一个被施加到多个光传输信号发送器中的所选择的一个，并且用于对相应的光传输信号进行轻微的调制。 光中继器中的分光器将大部分从光放大器的输出光输出到光终端上的光纤传输线，并将少量的光施加到测量电路。 测量电路使用从特定波长的参考信号光获得的参考频率同步地检测接收光中的测量频率分量。 调制器稍微改变另一个光放大器的放大增益，该放大增益响应于测量电路的测量结果而放大在另一条光纤传输线上传播的信号光。
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公开(公告)号：US4913506A
公开(公告)日：1990-04-03
申请号：US311218
申请日：1989-02-16
CPC分类号： B82Y20/00 , G02F1/01708 , G02F1/025 , G02F2001/0157 , G02F2202/101 , G02F2202/102
摘要： An optical modulation device is disclosed in which a difference between the photon energy of incident light and the band-gap energy of the modulation waveguide layer is set to a value greater than 50 meV to thereby suppress the degradation of the modulation voltage and the modulation band width which is caused by an increase in the intensity of incident light and in that the optical modulation device is formed in a predetermined length to thereby decrease the modulation voltage. The energy gap of the optical waveguide layer of the optical modulation device is varied continuously or discontinuously in the direction of its thickness to provide a constant absorption coefficient thickwise of the optical waveguide layer so that the electric field intensity distribution in the optical waveguide layer is compensated for, by which overlap of the light distribution and the absorption coefficient is increased so as to decrease the modulation voltage and broaden the modulation band by the reduction of the length of the device. The composition, thickness and stripe width of the optical waveguide layer are changed so that its absorption coefficient increases from the light receiving end face of the optical waveguide layer toward its light emitting end face, thereby making the number of carriers absorbed per unit length substantially constant in the direction of travel of light.
摘要翻译： 公开了一种光调制装置，其中将入射光的光子能量与调制波导层的带隙能量之间的差设定为大于50meV的值，从而抑制调制电压和调制带的劣化 由入射光强度的增加引起的宽度，并且光调制装置形成为预定长度，从而降低调制电压。 光调制装置的光波导层的能隙在其厚度方向上连续或不连续地变化，以提供光波导层厚度的恒定吸收系数，使得光波导层中的电场强度分布得到补偿 由此，增加了光分布和吸收系数的重叠，从而降低了调制电压，并且通过减小器件的长度来扩大调制频带。 改变光波导层的组成，厚度和条纹宽度，使得其吸收系数从光波导层的光接收端面向其发光端面增加，从而使每单位长度吸收的载流子基本恒定 在光的行进方向。
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