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公开(公告)号：US07280271B2
公开(公告)日：2007-10-09
申请号：US11424314
申请日：2006-06-15
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
CPC分类号： H04B10/296 , H01S3/005 , H01S3/06754 , H01S3/06758 , H01S3/06766 , H01S3/0677 , H01S3/094011 , H01S3/094046 , H01S3/094096 , H01S3/10007 , H01S3/10015 , H01S3/1301 , H01S3/302 , H01S2301/04 , H01S2301/06 , H04B10/2916 , H04B10/2942
摘要： The present invention provides methods and apparatuses for controlling a gain of a bidirectionally-pumped Raman fiber amplifier having both forward optical pumps and backward optical pumps. The overall gain is controlled by adjusting the forward optical pumps, while the power levels of the backward optical pumps are essentially fixed. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one forward optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump.
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公开(公告)号：US20070109626A1
公开(公告)日：2007-05-17
申请号：US11424312
申请日：2006-06-15
申请人： Xiang Zhou , Martin Birk
发明人： Xiang Zhou , Martin Birk
IPC分类号： H01S3/00
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094011 , H01S3/094046 , H01S3/094096 , H01S3/10015 , H01S3/1301 , H01S2301/04 , H04B10/2916 , H04B10/2942 , H04B10/296
摘要： The present invention provides methods and apparatuses for controlling a gain of a bidirectionally-pumped Raman fiber amplifier having both forward optical pumps and backward optical pumps. The overall gain is controlled by adjusting the forward optical pumps, while the power levels of the backward optical pumps are essentially fixed. Gain circuitry operates in an opened loop configuration and uses a predetermined function relating a power variation of at least one wavelength region with a pump power adjustment for at least one forward optical pump. Two approximate linear relationships between the input signal power variations and the required pump power adjustments are utilized in controlling the Raman fiber amplifier. Each approximate linear relationship includes at least one linear coefficient that relates a power variation for a specific wavelength region and a power adjustment of a specific Raman pump.
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公开(公告)号：US07196839B1
公开(公告)日：2007-03-27
申请号：US11275995
申请日：2006-02-08
IPC分类号： H01S3/30
CPC分类号： H01S3/302 , G02F1/365 , G02F2001/3528 , H01S3/094046
摘要： An ultraviolet super-continuum source with a fiber-optic may be provided with direct stimulation by a laser having a relatively narrow bandwidth, for example, less than the typical Raman shift in the material of the optical fiber to provide a super-continuum source extending for wavelengths below 400 nanometers.
摘要翻译： 具有光纤的紫外超连续光源可以被具有相对窄带宽的激光器的直接刺激提供，例如小于光纤材料中的典型拉曼位移，以提供超连续光源延伸 对于波长低于400纳米。
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44.发明申请公开(公告)号：US20050132785A1
公开(公告)日：2005-06-23
申请号：US11039905
申请日：2005-01-24
申请人： Miki Onaka , Yasushi Sugaya , Etsuko Hayashi
发明人： Miki Onaka , Yasushi Sugaya , Etsuko Hayashi
IPC分类号： G02F1/35 , H01S3/067 , H01S3/094 , H01S3/13 , H01S3/131 , H01S3/16 , H01S3/30 , H01S5/14 , H04B10/07 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , G01L3/26
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094003 , H01S3/094042 , H01S3/094046 , H01S3/094096 , H01S3/1301 , H01S3/1618 , H01S3/302 , H01S5/141
摘要： The present invention has an object to provide a Raman amplifier, a WDM optical communication system and a method of controlling the Raman amplification, capable of optimizing amplification characteristics in response to a change of operating conditions of the system so that transmission quality of the WDM signal light can be maintained in good. In order to achieve the above object, in the Raman amplifier according to the present invention, a plurality of pumping light generated by a pumping light generating section capable of varying a wavelength and power of the plurality of pumping light, are multiplexed by a pumping light multiplexing section that has wavelength variable transmission characteristics, and are supplied to an optical transmission path via a pumping light supplying section, and signal light being propagated through the optical transmission path is Raman amplified, wherein the Raman amplifier comprises a pumping light administrating section that controls supply conditions of the pumping light by adjusting operational setting of the pumping light generating section and the wavelength transmission characteristics of the pumping light multiplexing section in synchronization with the change with time of the system operational conditions.
摘要翻译： 本发明的目的是提供拉曼放大器，WDM光通信系统和控制拉曼放大的方法，其能够响应于系统的操作条件的变化来优化放大特性，使得WDM信号的传输质量 光能保持良好。 为了实现上述目的，在根据本发明的拉曼放大器中，由能够改变多个泵浦光的波长和功率的泵浦光产生部分产生的多个泵浦光由泵浦光 具有波长可变传输特性的复用部分，并且经由泵浦光供应部分被提供给光传输路径，并且通过光传输路径传播的信号光是拉曼放大的，其中拉曼放大器包括控制 通过随着系统操作条件随时间的变化同步地调节泵浦光发生部分的操作设置和泵浦光复用部分的波长传输特性来调节泵浦光的供给条件。
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公开(公告)号：US06850360B1
公开(公告)日：2005-02-01
申请号：US09848725
申请日：2001-05-04
申请人： Chien-Jen Chen , William S. Wong
发明人： Chien-Jen Chen , William S. Wong
CPC分类号： H01S3/1312 , H01S3/094046 , H04B10/2916 , H04B2210/003
摘要： Fiber-optic communications systems are provided for optical communications networks. Fiber-optic communications links may be provided that use spans of transmission fiber to carry optical data signals on wavelength-division-multiplexing channels at different wavelengths. Raman pump light may be used to provide Raman amplification for the optical data signals. The Raman pump light may be used to make measurements on the spans of transmission fiber. Raman pump light may be modulated to make optical time domain reflectometry measurements and measurements of the Raman gain coefficient in the fiber. Information on the measurements made using the Raman pump light may be used to control the Raman pump light during operation of the communications link and may be provided to a network management system.
摘要翻译： 为光通信网络提供光纤通信系统。 可以提供使用传输光纤的跨度在不同波长的波分复用信道上承载光数据信号的光纤通信链路。 可以使用拉曼泵浦光为光学数据信号提供拉曼放大。 拉曼泵浦光可用于对传输光纤的跨度进行测量。 可以调制拉曼泵浦光，以进行光时域反射测量和光纤中拉曼增益系数的测量。 关于使用拉曼泵浦光进行的测量的信息可以用于在通信链路的操作期间控制拉曼泵浦光，并且可以将其提供给网络管理系统。
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公开(公告)号：US20040208464A1
公开(公告)日：2004-10-21
申请号：US10755749
申请日：2004-01-12
发明人： Hong Po
IPC分类号： G02B006/02
CPC分类号： G02B6/03622 , G02B6/02 , G02B6/032 , G02B6/03638 , H01S3/06708 , H01S3/06729 , H01S3/094007 , H01S3/094042 , H01S3/094046
摘要： In one aspect, the invention relates to optical fibers and systems that include such fibers. In another aspect, the invention provides an optical fiber than includes a core, a cladding surrounding the core, a layer surrounding the cladding, and a region between the layer and the cladding. The region can comprise an index of refraction that is different than an index of refraction comprised by the cladding. In one embodiment, the region can include a void containing air or a liquid. The void can be evacuated. The region can include a solid, such as, for example, a polymer. The layer can contact the cladding. The fiber can comprise rare earth ions.
摘要翻译： 一方面，本发明涉及包括这种纤维的光纤和系统。 在另一方面，本发明提供了一种光纤，其包括芯，围绕芯的包层，围绕包层的层以及层与包层之间的区域。 该区域可以包括不同于包层所包括的折射率的折射率。 在一个实施方案中，该区域可以包括含有空气或液体的空隙。 空洞可以撤离。 该区域可以包括固体，例如聚合物。 该层可以接触包层。 纤维可以包含稀土离子。
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47.发明授权公开(公告)号：US06798564B2
公开(公告)日：2004-09-28
申请号：US10254839
申请日：2002-09-26
申请人： Masayuki Inoue , Masayuki Nishimura
发明人： Masayuki Inoue , Masayuki Nishimura
IPC分类号： H01S300
CPC分类号： H04B10/2916 , H01S3/094003 , H01S3/094046 , H01S3/094096 , H01S3/302
摘要： The present invention relates to a Raman amplification method realizing Raman amplification of WDM signal light in a wider amplification wavelength band with a simpler configuration, and the like. A Raman amplifier realizing the Raman amplification method comprises a Raman amplification optical fiber, and a pumping light source for supplying pumping light having a wavelength &lgr;p to the amplification optical fiber. In the Raman amplifier, a part of the signal light is Raman-amplified with the pumping light having the wavelength &lgr;p, whereas a part of the Raman-amplified light is utilized as pumping light. This Raman-amplifies signal light including a channel wavelength with a wavelength of (&lgr;p+&Dgr;&lgr;+20 nm) or longer, where &Dgr;&lgr; is the Raman shift amount of wavelength caused by the pumping light at the wavelength &lgr;p.
摘要翻译： 拉曼放大方法技术领域本发明涉及一种拉曼放大方法，其具有更简单的结构的宽放大波段的WDM信号光的拉曼放大等。 实现拉曼放大方法的拉曼放大器包括拉曼放大光纤和用于向放大光纤提供具有波长兰波特的泵浦光的泵浦光源。 在拉曼放大器中，信号光的一部分用具有波长兰波特的泵浦光拉曼放大，而一部分拉曼放大的光被用作泵浦光。 该拉曼放大包括波长为（lambdap + Deltalambda + 20nm）或更长波长的信道波长的信号光，其中Deltalλ是由波长兰波特的泵浦光引起的波长的拉曼移位量。
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48.发明授权公开(公告)号：US06775056B2
公开(公告)日：2004-08-10
申请号：US10032051
申请日：2001-12-21
IPC分类号： H01S306
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094042 , H01S3/094046 , H01S3/094096 , H01S3/0941 , H01S3/1301 , H01S3/302 , H01S2301/04 , H04B10/2935 , H04B2210/003
摘要： Optical systems of the present invention include a plurality of optical processing nodes in optical communication via a plurality of signal varying devices. A first signal varying device includes an optical fiber configured to produce Raman scattering/gain in a signal wavelength range and a first signal variation profile. A first pump source is configured provides sufficient pump power in a plurality of first pump wavelengths to stimulate Raman scattering/gain in the optical fiber within the signal wavelength range. A second signal varying device is provided having a second signal variation profile to produce a cumulative signal variation profile that differs from the first and second signal variation profiles.
摘要翻译： 本发明的光学系统包括经由多个信号变化装置进行光通信的多个光学处理节点。 第一信号变化装置包括被配置为在信号波长范围内产生拉曼散射/增益的光纤和第一信号变化曲线。 第一泵浦源被配置为在多个第一泵浦波长中提供足够的泵浦功率以在信号波长范围内激发光纤中的拉曼散射/增益。 提供了具有第二信号变化曲线的第二信号变化装置，以产生不同于第一和第二信号变化曲线的累积信号变化曲线。
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公开(公告)号：US20030137720A1
公开(公告)日：2003-07-24
申请号：US10267858
申请日：2002-10-10
申请人： FUJITSU LIMITED
发明人： Miki Onaka , Yasushi Sugaya , Etsuko Hayashi
IPC分类号： H01S003/00
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094003 , H01S3/094042 , H01S3/094046 , H01S3/094096 , H01S3/1301 , H01S3/1618 , H01S3/302 , H01S5/141
摘要： The present invention has an object to provide a Raman amplifier, a WDM optical communication system and a method of controlling the Raman amplification, capable of optimizing amplification characteristics in response to a change of operating conditions of the system so that transmission quality of the WDM signal light can be maintained in good. In order to achieve the above object, in the Raman amplifier according to the present invention, a plurality of pumping light generated by a pumping light generating section capable of varying a wavelength and power of the plurality of pumping light, are multiplexed by a pumping light multiplexing section that has wavelength variable transmission characteristics, and are supplied to an optical transmission path via a pumping light supplying section, and signal light being propagated through the optical transmission path is Raman amplified, wherein the Raman amplifier comprises a pumping light administrating section that controls supply conditions of the pumping light by adjusting operational setting of the pumping light generating section and the wavelength transmission characteristics of the pumping light multiplexing section in synchronization with the change with time of the system operational conditions.
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公开(公告)号：US06344922B1
公开(公告)日：2002-02-05
申请号：US09253819
申请日：1999-02-19
IPC分类号： H01S300
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094042 , H01S3/094046 , H01S3/094096 , H01S3/0941 , H01S3/1301 , H01S3/302 , H01S2301/04 , H04B10/2935 , H04B2210/003
摘要： Optical systems of the present invention include a plurality of optical processing nodes in optical communication via at least one signal varying device. The signal varying devices includes an optical fiber suitable for facilitating Raman scattering/gain in a signal wavelength range and a pump energy source for providing pump energy in a plurality of pump wavelengths. The pump source provides sufficient pump energy in each pump wavelength to stimulate Raman scattering/gain in the optical fiber within the signal wavelength range. The pump wavelengths are selected such that the combined Raman gain resulting from the pump energy supplied by each pump wavelength produces a desired signal variation profile in the signal wavelength range. In addition, the pump energy supplied by at least one of the pump wavelengths can be varied to produce a controlled signal intensity variation profile over the signal wavelength range in the optical fiber.
摘要翻译： 本发明的光学系统包括经由至少一个信号变化装置进行光通信的多个光学处理节点。 信号变化装置包括适于促进信号波长范围内的拉曼散射/增益的光纤和用于在多个泵浦波长中提供泵浦能量的泵浦能量源。 泵浦源在每个泵波长中提供足够的泵浦能量，以在信号波长范围内激发光纤中的拉曼散射/增益。 选择泵浦波长，使得由每个泵浦波长提供的泵浦能量产生的组合拉曼增益在信号波长范围内产生期望的信号变化曲线。 此外，可以改变由至少一个泵浦波长提供的泵浦能量，以在光纤中的信号波长范围上产生受控的信号强度变化曲线。
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