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公开(公告)号：US5355250A
公开(公告)日：1994-10-11
申请号：US84770
申请日：1993-06-29
申请人： Giorgio Grasso , Aldo Righetti , Mario Tamburello
发明人： Giorgio Grasso , Aldo Righetti , Mario Tamburello
IPC分类号： G02F1/35 , H01S3/00 , H01S3/06 , H01S3/07 , H01S3/094 , H04B10/08 , H04B10/16 , H04B10/17 , H01S3/10 , H01J5/16 , H04B9/00
CPC分类号： H04B10/2931 , H04B10/077 , H04B10/07955
摘要： The telecommunication line comprises at least one terminal station having an optical-signal transmitter and an optical-signal receiver, which are operationally connected by an automatic protection device suitable for shutting down said transmitter in the absence of a received optical signal, at least one opticalfibre line for the transmission of the optical signals transmitted by said transmitter and received by said receiver, and at least one optical amplifier included in said line. With said optical amplifier there are associated means for the detection of the presence of light energy at input and means for causing the shut down of the amplifier, which in the absence of light energy at input are caused by said detection means to interrupt substantially any emission of light energy on the part of said optical amplifier.
摘要翻译： 电信线路包括至少一个具有光信号发射机和光信号接收机的终端站，该终端站由适用于在没有接收到的光信号的情况下关闭所述发射机的自动保护装置可操作地连接至少一个光纤 用于由所述发射机发送并由所述接收机接收的光信号的传输线，以及包括在所述线路中的至少一个光放大器。 对于所述光放大器，存在用于检测输入处的光能的存在的相关装置和用于引起放大器关闭的装置，在放大器的输入不存在光能的情况下，由所述检测装置基本上中断任何发射 的所述光放大器的一部分上的光能。
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2.发明授权
公开(公告)号：US5278686A
公开(公告)日：1994-01-11
申请号：US846276
申请日：1992-03-02
申请人： Giorgio Grasso , Aldo Righetti , Mario Tamburello
发明人： Giorgio Grasso , Aldo Righetti , Mario Tamburello
CPC分类号： H04B10/291 , H04B10/077 , H04B10/07955
摘要： An optical fiber telecommunications system having two terminals interconnected by optical fibers and active-fiber optical amplifiers. Each terminal has an optical telecommunication signal transmitter associated with an optical signal receiver which are interconnected by a protective device which causes the transmitter to be inoperative when its associated receiver does not receive an optical signal. Optical switches are provided at the downstream sides of active-fiber optical amplifiers and are controlled by detecting devices coupled to amplifier outputs, each of which detecting devices opens the associated switch in the absence of a signal having the characteristics, e.g. an alternating component, of the optical telecommunication signal whereby the protective devices are operated.
摘要翻译： 具有通过光纤和有源光纤光放大器互连的两个端子的光纤通信系统。 每个终端具有与光信号接收器相关联的光通信信号发射器，其通过保护装置互连，当其相关接收机没有接收到光信号时，该保护装置使得发射机不起作用。 光开关设置在有源光纤光放大器的下游侧，并通过耦合到放大器输出的检测装置进行控制，每个检测装置在没有具有特性的信号的情况下打开关联的开关。 光通信信号的交替分量，由此保护装置被操作。
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公开(公告)号：US08380076B2
公开(公告)日：2013-02-19
申请号：US12520914
申请日：2006-12-27
申请人： Pierpaolo Boffi , Giorgio Grasso , Lucia Marazzi , Paola Parolari , Aldo Righetti , Marco Romagnoli , Giovanni Tamiri
发明人： Pierpaolo Boffi , Giorgio Grasso , Lucia Marazzi , Paola Parolari , Aldo Righetti , Marco Romagnoli , Giovanni Tamiri
CPC分类号： H04B10/25133 , G02B6/29343 , G02B6/29394
摘要： An optical transmission system having an optical source, an optical dispersion compensation filter optically connected to the optical source, and a control system. The optical source generates a modulated optical signal having an optical spectrum and a value of dispersion robustness. The optical dispersion compensation filter has at least two cascaded optical resonators and a periodic transfer function rigidly translatable in the frequency spectrum to obtain translation in frequency of the transfer function without a substantial change in shape, and characterized by a free spectral range. The control system acts on the optical dispersion compensation filter in order to rigidly translate the transfer function along the frequency spectrum in first and second positions in the frequency spectrum. The translation of the transfer function between the first and the second positions is smaller than the free spectral range.
摘要翻译： 一种具有光源，光学连接到光源的光学色散补偿滤光器和控制系统的光传输系统。 光源产生具有光谱和色散鲁棒性值的调制光信号。 光学色散补偿滤波器具有至少两个级联的光学谐振器和在频谱中可以刚性地平移的周期性传递函数，以获得传递函数的频率的平移，而不会形成实质的变化，并且其特征在于自由光谱范围。 控制系统作用于光学色散补偿滤波器，以便在频谱中的第一和第二位置沿着频谱刚性地平移传递函数。 第一和第二位置之间的传递函数的平移小于自由光谱范围。
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4.发明授权
公开(公告)号：US5233463A
公开(公告)日：1993-08-03
申请号：US857740
申请日：1992-03-26
申请人： Giorgio Grasso , Aldo Righetti
发明人： Giorgio Grasso , Aldo Righetti
CPC分类号： H04B10/2912 , H01S3/06758
摘要： The optical amplifier (1) comprises two amplifying stages, an upstream amplifying stage (S.sub.M) and a downstream amplifying stage (S.sub.V). The former stage comprises an upstream active fiber (9) doped with a fluorescent dopant and connected serially to the optical fiber line (2), an upstream optical coupler (10) connected serially downstream from the upstream section of active fiber (9), a laser diode (11) for supplying pumping energy towards the upstream active fiber (9) through the coupler (10), said coupler being oriented to cause pump energy travel towards said upstream active fiber (9) in the opposite direction from the predetermined signal direction (S); the latter stage (S.sub.V) comprises a downstream active fiber (3) doped with a fluorescent dopant and connected serially in the optical fiber (2), a downstream optical coupler (4) connected serially in the downstream active fiber (3), a laser diode (5) for supplying pumping energy into the downstream active fiber (3) through the downstream coupler (4), a first optical isolator ( 7) serially connected upstream of the downstream active fiber (3), a second optical isolator (8) serially connected downstream from the downstream active fiber (3).
摘要翻译： 光放大器（1）包括两个放大级，上游放大级（SM）和下游放大级（SV）。 前级包括掺杂有荧光掺杂剂的上游有源光纤（9）并且串联连接到光纤线路（2），连接在有源光纤（9）的上游部分下游的上游光耦合器（10） 激光二极管（11），用于通过耦合器（10）向上游有源光纤（9）提供泵浦能量，所述耦合器被定向成使得泵能量在与预定信号方向相反的方向上朝着所述上游有源光纤（9）行进 （S）; 后级（SV）包括掺杂有荧光掺杂剂并在光纤（2）中串联连接的下游有源光纤（3），串联连接在下游有源光纤（3）中的下游光耦合器（4），激光 用于通过下游耦合器（4）向下游有源光纤（3）提供泵浦能量的二极管（5），串联连接在下游有源光纤（3）上游的第一光隔离器（7），第二光隔离器（8） 与下游有源光纤（3）的下游串联连接。
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公开(公告)号：US5138483A
公开(公告)日：1992-08-11
申请号：US824742
申请日：1992-01-21
申请人： Giorgio Grasso , Aldo Righetti , Flavio Fontana
发明人： Giorgio Grasso , Aldo Righetti , Flavio Fontana
IPC分类号： G02F1/35 , H01S3/06 , H01S3/07 , H01S3/0915 , H01S3/094 , H01S3/10 , H01S3/17 , H01S3/30 , H04B10/12
CPC分类号： H01S3/094003 , G05B2219/50372 , G05B2219/50373
摘要： An optical, low-noise amplifier of the active-fiber type, which fiber contains a laser light emitting substance, adapted to be connected to an optical telecommunication fiber and receiving light therefrom at the transmission wavelength. The active fiber is also fed from a light source at a pumping wavelength and has a length corresponding to a partial absorption of the pumping light. Downstream of active fiber, there is a selective mirror device which reflects the light at the pumping wavelength and is transparent to the transmission wavelength light. Preferably, the mirror device consists of an optical demultiplexer adapted to separate the transmission wavelength and the pumping wavelength on two output fibers. A mirror which reflects the pumping wavelength is present at the end of the fiber carrying the pumping wavelength.
摘要翻译： 一种有源光纤类型的光学低噪声放大器，该光纤包含激光发射物质，其适于连接到光通信光纤并以透射波长从其接收光。 有源光纤也从泵浦波长的光源进给，其长度对应于泵浦光的部分吸收。 在有源光纤的下游，有一个选择性反射镜装置，它反射了在激发波长的光，并对透射波长的光是透明的。 优选地，镜装置由适于在两个输出光纤上分离透射波长和激发波长的光解复用器组成。 反射泵浦波长的反射镜存在于带有泵浦波长的光纤的端部。
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公开(公告)号：US5245467A
公开(公告)日：1993-09-14
申请号：US891680
申请日：1992-05-28
申请人： Giorgio Grasso , Aldo Righetti , Flavio Fontana
发明人： Giorgio Grasso , Aldo Righetti , Flavio Fontana
CPC分类号： H01S3/06708 , H01S3/06754 , H01S3/17 , H01S2301/04 , H01S3/094011 , H01S3/1693 , H01S3/1698
摘要： An optical fiber and an optical amplifier, in particular for optical fiber telecommunication lines operating with a transmission signal in a predetermined wavelength range. The amplifier comprises laser emitting active optical fiber doped with erbium and a further doping substance, distributed along the fiber. The further doping substance has an absorption for a light having a wavelength lower than 1,540 nm substantially higher than the absorption that the further doping substance shows for a light having a wavelength varying from 1,540 nm to the upper limit of the predetermined wavelength range of the transmission signal. Preferably, the further doping substance is samarium. Samarium contained in the fiber is capable of absorbing the spontaneous erbium emission, which would constitute a noise source, thereby allowing a communication signal to be amplified in a wavelength range corresponding substantially to the tolerance range of the commercially available laser light emitters used as the communication signal source.
摘要翻译： 光纤和光放大器，特别是用于以预定波长范围的传输信号工作的光纤通信线路。 放大器包括掺杂有铒的激光发射有源光纤和沿着光纤分布的另外的掺杂物质。 进一步的掺杂物质对于波长低于1540nm的光的吸收，其显着高于进一步的掺杂物质对于具有从1540nm变化到传输的预定波长范围的上限的光的显示的吸收， 信号。 优选地，另外的掺杂物质是钐。 包含在纤维中的钐能够吸收构成噪声源的自发铒发射，从而允许通信信号在基本上对应于用作通信的市售激光发射器的公差范围内的波长范围内被放大 信号源。
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7.发明申请公开(公告)号：US20100232802A1
公开(公告)日：2010-09-16
申请号：US12520914
申请日：2006-12-27
申请人： Pierpaolo Boffi , Giorgio Grasso , Lucia Marazzi , Paola Parolari , Aldo Righetti , Marco Romagnoli , Giovanni Tamiri
发明人： Pierpaolo Boffi , Giorgio Grasso , Lucia Marazzi , Paola Parolari , Aldo Righetti , Marco Romagnoli , Giovanni Tamiri
CPC分类号： H04B10/25133 , G02B6/29343 , G02B6/29394
摘要： Optical transmission system (200) comprising: an optical source (210) adapted to generate a modulated optical signal having an optical spectrum and a dispersion robustness; an optical dispersion compensation filter (250) optically connected to the optical source, comprising at least two cascaded optical resonators and having a periodic transfer function that is rigidly translatable in the frequency spectrum and characterized by a free spectral range (FSR); a control system (270; 280; 260) adapted to act on the optical compensation filter in order rigidly to translate said transfer function along the frequency spectrum in a first and in a second position in such a way that: in a first position in the frequency spectrum of said transfer function, the mean chromatic dispersion weighted over said optical spectrum of the modulated signal is greater, in absolute value, than the value of dispersion robustness; in a second position in the frequency spectrum of said transfer function, the mean chromatic dispersion weighted over said optical spectrum of the modulated signal is smaller, in absolute value, than the value of dispersion robustness; in the first and in the second position the mean slope of the chromatic dispersion weighted over said optical spectrum of the modulated signal is smaller, in absolute terms, than 300000 ps/nm2, where the translation of said transfer function between the first and the second position is smaller than said FSR.
摘要翻译： 光传输系统（200）包括：光源（210），适于产生具有光谱和色散鲁棒性的调制光信号; 光学连接到光源的光学色散补偿滤波器（250），包括至少两个级联的光学谐振器，并且具有在频谱中可刚性地平移的周期性传递函数，并且由自由光谱范围（FSR）表征。 控制系统（270; 280; 260），其适于作用在所述光学补偿滤波器上，以便在第一和第二位置中沿着所述频谱平移所述传递函数，使得在所述光学补偿滤波器中的第一位置处于 所述传递函数的频谱，在调制信号的所述光谱上加权的平均色散比绝对值大于色散鲁棒性的值; 在所述传递函数的频谱中的第二位置，在所述调制信号的所述光谱上加权的平均色散比绝对值小于分散鲁棒性的值; 在第一位置和第二位置，在调制信号的所述光谱上加权的色散的平均斜率绝对值小于300000ps / nm2，其中所述第一和第二信号之间的所述传递函数的平移 位置小于所述FSR。
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公开(公告)号：US5497265A
公开(公告)日：1996-03-05
申请号：US162651
申请日：1993-12-06
申请人： Flavio Fontana , Aldo Righetti , Giorgio Grasso
发明人： Flavio Fontana , Aldo Righetti , Giorgio Grasso
IPC分类号： H01S3/07 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/10 , H04B10/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28 , H04B10/00
CPC分类号： H01S3/067 , H01S3/06754 , H01S3/094003
摘要： An optical signal generator for telecommunication systems, comprising at least a single-frequency active optical fiber laser as an optical signal source at a signal transmission wavelength, at least an active optical fiber optical amplifier operatively connected to said laser and at least one source of pumping optical power at a pumping wavelength, the pumping optical power source being operatively connected to at least one of said active fibers of said laser and amplifier and transfer-means for said pumping optical power being connected to said active fibers of said laser and amplifier, in order to transfer unabsorbed optical power at the pumping wavelength from one of said active fibers to the other of said active fibers.
摘要翻译： 一种用于电信系统的光信号发生器，包括至少一个单频有源光纤激光器作为信号传输波长的光信号源，至少一个可操作地连接到所述激光器的有源光纤光放大器和至少一个泵浦源 泵浦光功率可操作地连接到所述激光器和放大器的所述有源光纤中的至少一个，并且用于所述泵浦光功率的转移装置被连接到所述激光器和放大器的所述有源光纤， 以将泵浦波长的未吸收光功率从所述活性纤维之一转移到所述活性纤维中的另一个。
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公开(公告)号：US5204923A
公开(公告)日：1993-04-20
申请号：US839056
申请日：1992-02-18
申请人： Giorgio Grasso , Aldo Righetti
发明人： Giorgio Grasso , Aldo Righetti
CPC分类号： H04B10/2912 , G02B6/4208 , H01S3/0064 , H01S3/06754 , H01S2301/02
摘要： A unit for amplifying light signals in optical fiber transmission lines includes a fiber optical amplifier to which light signals are transmitted through an input optical fiber line, and from which the signals, after having been amplified, are introduced into an output optical fiber line. First and second optical insulators are interposed between the fiber optical amplifier and the input and output lines to prevent the transmission of optical noise signals from the input and output lines, respectively, to the amplifier.
摘要翻译： 用于在光纤传输线路中放大光信号的单元包括：光信号通过输入光纤线路传输的光纤放大器，放大后的信号从该光放大器引入输出光纤线路。 第一和第二光绝缘体插入在光纤放大器和输入和输出线之间，以防止光输入和输出线分别将光噪声信号传输到放大器。
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10.再颁专利
公开(公告)号：USRE35697E
公开(公告)日：1997-12-23
申请号：US425390
申请日：1995-04-20
申请人： Giorgio Grasso , Aldo Righetti
发明人： Giorgio Grasso , Aldo Righetti
CPC分类号： H04B10/291 , H04B10/2912
摘要： A unit for amplifying light signals in optical fiber transmission lines includes a fiber optical amplifier to which light signals are transmitted through an input optical fiber line, and from which the signals, after having been amplified, are introduced into an output optical fiber line. First and second optical insulators are interposed between the fiber optical amplifier and the input and output lines to prevent the transmission of optical noise signals from the input and output lines, respectively, to the amplifier.
摘要翻译： 用于在光纤传输线路中放大光信号的单元包括：光信号通过输入光纤线路传输的光纤放大器，放大后的信号从该光放大器引入输出光纤线路。 第一和第二光绝缘体插入在光纤放大器和输入和输出线之间，以防止光输入和输出线分别将光噪声信号传输到放大器。
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