公开(公告)号：US5161050A

公开(公告)日：1992-11-03

申请号：US642221

申请日：1991-01-16

申请人： Giorgio Grasso ,  Aldo Righetti

发明人： Giorgio Grasso ,  Aldo Righetti

IPC分类号： G02B6/00 ,  G02B6/28 ,  G02F1/35 ,  G02F1/39 ,  H01P1/16 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/08 ,  H01S3/094 ,  H01S3/10 ,  H01S3/108 ,  H01S3/16 ,  H04B10/17

CPC分类号： H04B10/291 ,  H01S3/06708 ,  H04B10/2912 ,  H01S3/08045 ,  H01S3/094065

摘要： An optical amplifier, particularly useful for optical fiber telecommunication lines, which includes an active fiber doped with a fluorescent dopant which provides light energy emission at the wavelength of the transmission signals when the latter signals are applied thereto. One section of telecommunication line is connected to one input of a dichroic coupler, the output of which is connected to one end of the active fiber and the other input of which is connected to a source of pumping energy at a wavelength lower than that of the transmission signals. The other end of the active fiber is connected to another section of the telecommunication line. In rectilinear form, the active fiber provides single-mode propagation of the energy at the signal wavelength and multi-mode propagation of energy at the pumping energy wavelength. However, the active fiber is bent to a radius of curvature for at least 70% of its length which will provide only fundamental mode propagation at the pumping energy wavelength which also reduces the mode diameter for the transmission signals.

摘要翻译： 一种特别适用于光纤通信线路的光放大器，其包括掺杂有荧光掺杂剂的有源光纤，当将后一种信号施加于该光放大器时，其提供在传输信号波长处的光能发射。 电信线路的一部分连接到二向色耦合器的一个输入端，二极管耦合器的输出端连接到有源光纤的一端，另一个输入端连接到波长比波长 传输信号。 有源光纤的另一端连接到电信线路的另一部分。 在直线形式中，有源光纤在信号波长处提供能量的单模传播，并且在泵浦能量波长处提供能量的多模式传播。 然而，有源光纤弯曲到其长度的至少70％的曲率半径，其仅在泵浦能量波长处仅提供基模传播，这也降低了传输信号的模式直径。

公开(公告)号：US5119229A

公开(公告)日：1992-06-02

申请号：US602364

申请日：1990-10-22

申请人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

发明人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

IPC分类号： G02F1/35 ,  G02B6/28 ,  G02B6/34 ,  G02F1/39 ,  H01S3/06 ,  H01S3/07 ,  H01S3/0915 ,  H01S3/094 ,  H01S3/17 ,  H01S3/30 ,  H04B10/04 ,  H04B10/06 ,  H04B10/12 ,  H04B10/142 ,  H04B10/152

CPC分类号： H01S3/094003 ,  G02B6/2821

摘要： An optical amplifier (3) in accordance with the invention consists of the assembly of a length of active-core optical fiber (8), single-mode to both pumping and signal optical radiations, and a dichroic coupler (6) which includes two optical fiber lengths (9, 10), both single-mode to pumping and signal optical radiations, coupled to each other over one portion (11) by fusion of the respective claddings and substantial setting in common of the respective cores in the fused portion (11).

公开(公告)号：US4867527A

公开(公告)日：1989-09-19

申请号：US172656

申请日：1988-03-24

申请人： Enrico Dotti ,  Giorgio Grasso ,  Gianmario Lanfranconi

发明人： Enrico Dotti ,  Giorgio Grasso ,  Gianmario Lanfranconi

IPC分类号： G02B6/44 ,  H01B9/00 ,  H01B11/22

CPC分类号： H01B9/005 ,  G02B6/4416

摘要： A cable for conveying both electrical power and optical signals, the cable having an electric conductor with insulation therearound, a sheath around the insulation, a one or two part protective layer around the insulation, a tube within the protective layer and at least one optical fiber loosely received in the tube. The protective layer can have armoring therearound and in this case, the radial thickness of the protective layer is from two to four times the diameter of the tube.

公开(公告)号：US08975508B2

公开(公告)日：2015-03-10

申请号：US14342169

申请日：2012-08-22

申请人： Giorgio Grasso ,  Francesco Morichetti ,  Silvia Maria Pietralunga ,  Aldo Righetti ,  Maria Chiara Ubaldi

发明人： Giorgio Grasso ,  Francesco Morichetti ,  Silvia Maria Pietralunga ,  Aldo Righetti ,  Maria Chiara Ubaldi

IPC分类号： H01L31/054 ,  H01L31/052 ,  F24J2/06 ,  F24J2/12 ,  G02B19/00 ,  H01L31/0232

CPC分类号： H01L31/0525 ,  F24S23/10 ,  F24S23/71 ,  G02B19/0028 ,  H01L31/02327 ,  H01L31/054 ,  H01L31/0547 ,  Y02E10/42 ,  Y02E10/52

摘要： A solar concentrator (1) having a longitudinal axis of extension (3) and a cross-section at right angles to the longitudinal axis substantially equal for a continuum of cross-sections, and comprising a reflective system (6) and a refractive system (7), the reflective system forming an optical inlet (8) and an optical outlet (9) and comprising two semi-portions positioned specularly relative to the plane of symmetry, where the cross-section profile of the refractive system is a triangle (11) having a base (12) at the optical outlet (9) and apex (13) on the axis of symmetry (5), where the cross-section profile of each semi-portion of the reflective system comprises a segment (18) in the shape of a parabola having an axis (20) forming with the axis of symmetry an acceptance angle (θ0) greater than zero and a focus (F) on the axis of symmetry, and where the focus falls inside the triangle.

摘要翻译： 一种具有延伸长度（3）的纵向轴线的横截面和与纵向轴线成直角的横截面基本相等于连续的横截面的太阳能集中器（1），并且包括反射系统（6）和折射系统 7），反射系统形成光学入口（8）和光学出口（9），并且包括相对于对称平面镜面定位的两个半部分，其中折射系统的横截面轮廓是三角形（11 ）在光学出口（9）处具有基部（12）和在对称轴线（5）上的顶点（13），其中反射系统的每个半部分的横截面轮廓包括一个（18） 抛物线的形状具有轴线（20），其以对称轴形成大于零的接受角（＆amp;θ）和对称轴上的焦点（F），并且其中焦点落在三角形内。

公开(公告)号：US20140209148A1

公开(公告)日：2014-07-31

申请号：US14342169

申请日：2012-08-22

申请人： Giorgio Grasso ,  Francesco Morichetti ,  Silvia Maria Pietralunga ,  Aldo Righetti ,  Maria Chiara Ubaldi

发明人： Giorgio Grasso ,  Francesco Morichetti ,  Silvia Maria Pietralunga ,  Aldo Righetti ,  Maria Chiara Ubaldi

IPC分类号： H01L31/052 ,  G02B19/00 ,  H01L31/0232

CPC分类号： H01L31/0525 ,  F24S23/10 ,  F24S23/71 ,  G02B19/0028 ,  H01L31/02327 ,  H01L31/054 ,  H01L31/0547 ,  Y02E10/42 ,  Y02E10/52

摘要： A solar concentrator (1) having a longitudinal axis of extension (3) and a cross-section at right angles to the longitudinal axis substantially equal for a continuum of cross-sections, and comprising a reflective system (6) and a refractive system (7), the reflective system forming an optical inlet (8) and an optical outlet (9) and comprising two semi-portions positioned specularly relative to the plane of symmetry, where the cross-section profile of the refractive system is a triangle (11) having a base (12) at the optical outlet (9) and apex (13) on the axis of symmetry (5), where the cross-section profile of each semi-portion of the reflective system comprises a segment (18) in the shape of a parabola having an axis (20) forming with the axis of symmetry an acceptance angle (θ0) greater than zero and a focus (F) on the axis of symmetry, and where the focus falls inside the triangle.

摘要翻译： 一种具有延伸长度（3）的纵向轴线的横截面和与纵向轴线成直角的横截面基本相等于连续的横截面的太阳能集中器（1），并且包括反射系统（6）和折射系统 7），反射系统形成光学入口（8）和光学出口（9），并且包括相对于对称平面镜面定位的两个半部分，其中折射系统的横截面轮廓是三角形（11 ）在光学出口（9）处具有基部（12）和在对称轴线（5）上的顶点（13），其中反射系统的每个半部分的横截面轮廓包括一个（18） 抛物线的形状具有轴线（20），其以对称轴形成大于零的接受角（＆amp;θ）和对称轴上的焦点（F），并且其中焦点落在三角形内。

公开(公告)号：US07006281B1

公开(公告)日：2006-02-28

申请号：US10757970

申请日：2004-01-14

申请人： Fausto Meli ,  Roberta Castagnetti ,  Giorgio Grasso

发明人： Fausto Meli ,  Roberta Castagnetti ,  Giorgio Grasso

IPC分类号： H01S3/00

CPC分类号： H04B10/2942 ,  H04J14/0221

摘要： An amplification architecture for WDM receiver systems. The WDM channel grid is divided into groups of adjacent channels. A separate optical amplifier is provided for each channel with a single pump being shared among the channels of each group. The gain experienced by channels of a given group may be adjusted by varying the power of the group's pump. This approach allows equalization of received channel power such that all channels fall within the desired dynamic range. The amplification architecture may be implemented in a space-efficient manner at low cost.

摘要翻译： WDM接收机系统的放大架构。 WDM信道网格分为相邻信道组。 为每个通道提供单独的光放大器，每个通道的通道之间共享单个泵。 可以通过改变组的泵的功率来调整给定组的通道所获得的增益。 这种方法允许接收信道功率的均衡，使得所有信道落在所需的动态范围内。 放大架构可以以低成本的空间效率的方式来实现。

公开(公告)号：US06961522B1

公开(公告)日：2005-11-01

申请号：US09717036

申请日：2000-11-22

申请人： Roberta Castagnetti ,  Fabrizio Di Pasquale ,  Giorgio Grasso ,  Fausto Meli ,  Giovanni Sacchi

发明人： Roberta Castagnetti ,  Fabrizio Di Pasquale ,  Giorgio Grasso ,  Fausto Meli ,  Giovanni Sacchi

IPC分类号： H04B10/00 ,  H04B10/17 ,  H04J14/02

CPC分类号： H04B10/2931 ,  H04B10/2916 ,  H04J14/0221

摘要： An approach for automatic Raman gain and tilt control for a WDM (Wavelength Division Multiplexing) optical communication systems is disclosed. An optical fiber carries a plurality of optical signals, in which at least one of the optical signals are reference signals. An optical gain unit (e.g., Raman pump unit) couples to the optical fiber and adjusts the reference signals to compensate, in part, for losses associated with the optical fiber and gain tilt accumulation. Upon detecting and analyzing the reference signals, a controller controls the optical gain unit and outputs a control signal to the optical gain unit based upon the analyzed reference signals. An optical amplifier is connected to the optical fiber and amplifies the optical signals. The optical gain unit provides a nearly constant power per channel at an input of the optical amplifier. Under this approach, a Raman gain control mechanism, combined with the use of gain controlled EDFA (Erbium Doped Fiber Amplifier), allows high transmission capacity over ultra-long distances without optical regeneration and with high flexibility.

摘要翻译： 公开了一种用于WDM（波分复用）​​光通信系统的自动拉曼增益和倾斜控制的方法。 光纤携带多个光信号，其中至少一个光信号是参考信号。 光增益单元（例如，拉曼泵单元）耦合到光纤并且调整参考信号以部分地补偿与光纤相关联的损耗和增益倾斜积累。 在检测和分析参考信号时，控制器控制光学增益单元，并且基于分析的参考信号向光学增益单元输出控制信号。 光放大器连接到光纤并放大光信号。 光学增益单元在光放大器的输入处提供每通道几乎恒定的功率。 在这种方法下，拉曼增益控制机制与增益控制EDFA（掺铒光纤放大器）结合使用，可实现超长距离的高传输容量，无需光学再生和高灵活性。

公开(公告)号：US06191854B1

公开(公告)日：2001-02-20

申请号：US09102759

申请日：1998-06-23

申请人： Giorgio Grasso ,  Aldo Righetti ,  Paolo Ottolenghi ,  Fabio Donati

发明人： Giorgio Grasso ,  Aldo Righetti ,  Paolo Ottolenghi ,  Fabio Donati

IPC分类号： H01S300

CPC分类号： H04B10/25253 ,  H04B2210/252

摘要： Optical telecommunications system, comprising: a transmitting station capable of emitting an optical signal having a power of between 18 and 30 dBm; an optical fibre transmission line capable of transmitting the said optical signal, comprising dispersion shifted fibre with a length of between 100 km and 1000 km; an optical receiving station, capable of receiving the said optical signal; which comprises, between the said transmission line and the said optical receiver, a chromatic dispersion compensator. Preferably the said optical fibre transmission line has a length of between 200 and 400 km.

摘要翻译： 光通信系统，包括：能够发射功率在18和30dBm之间的光信号的发射台;能够传输所述光信号的光纤传输线，包括长度在100公里和 1000km;能够接收所述光信号的光接收站;在所述传输线和所述光接收器之间包括色散补偿器。优选地，所述光纤传输线的长度为200-400 公里。

公开(公告)号：US5809196A

公开(公告)日：1998-09-15

申请号：US768129

申请日：1996-12-17

申请人： Fausto Meli ,  Giorgio Grasso

发明人： Fausto Meli ,  Giorgio Grasso

IPC分类号： H04B10/18 ,  G02B6/02 ,  G02B6/16

CPC分类号： G02B6/02271 ,  G02B6/0228 ,  H04B10/2525 ,  H04B10/2563 ,  G02B6/03611 ,  G02B6/03688

摘要： An optical telecommunication system has at least two sources of optical modulated signals at different wavelengths in a predetermined transmission wavelength band, together with a multiplexer for the signals, an optical fiber line connected at one end to the multiplexer, and a demultiplexer/receiver for the signals. The line comprises an optical fiber having a chromatic dispersion value lower than a predetermined value in the transmission wavelength band and increasing as wavelength increases. The fiber also has a zero value of chromatic dispersion at a wavelength lower than the minimum wavelength of the transmission wavelength band by such an amount that no local wavelength zero value of the chromatic dispersion present in the fiber and capable of generating a four-wave-mixing phenomenon is included in the band.

摘要翻译： 光通信系统在预定的传输波长带中具有不同波长的至少两个光调制信号源，以及用于信号的多路复用器，一端连接到多路复用器的光纤线路和用于该多路复用器的解复用器/接收器 信号。 该线包括在透射波长带中具有低于预定值的色散值的光纤，并且随着波长的增加而增加。 该光纤在波长比发送波长带的最小波长低的波长处具有零色散值，使得光纤中不存在色散的局部波长零值并且能够产生四波 - 混合现象包括在乐队中。

公开(公告)号：US5638204A

公开(公告)日：1997-06-10

申请号：US156880

申请日：1993-11-23

申请人： Giorgio Grasso ,  Aldo Righetti ,  Fausto Meli

发明人： Giorgio Grasso ,  Aldo Righetti ,  Fausto Meli

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/00 ,  G02B6/10

CPC分类号： H01S3/06708 ,  H01S3/094011 ,  H01S3/1693

摘要： An optical fiber power amplifier, particularly for telecommunication lines with optical fibers, including an active fiber doped with Erbium as a fluorescing substance, and with Al.sub.2 O.sub.3 as refraction index modifying dopant. The fiber is pumped with a laser providing a wavelength higher than 520 nm and preferably, 980 nm. The amplifier has a particularly high amplification efficiency close to the theoretical maximum efficiency.

摘要翻译： 一种光纤功率放大器，特别是用于具有光纤的电信线路，包括掺杂有铒作为荧光物质的有源光纤，以及Al 2 O 3作为折射率修饰掺杂剂。 纤维用提供高于520nm，优选980nm的波长的激光器泵送。 该放大器具有接近理论最大效率的特别高的放大效率。