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1. 发明申请

WO2004036704A3 ERBIUM DOPED FIBRES 审中-公开
公开(公告)号：WO2004036704A3
公开(公告)日：2004-04-29
申请号：PCT/GB2003/004472
申请日：2003-10-14
申请人： MARCONI UK INTELLECTUAL PROPERTY LTD , MARCONI COMMUNICATIONS SPA , FELLA, Paolo , DI MURO, Rodolfo
发明人： FELLA, Paolo , DI MURO, Rodolfo
IPC分类号： H01S3/067
摘要： A method of producing green light signals, comprising coupling pump signals from at least one pump source into at least one erbium doped fibre (EDF) which cause ground state absorption (GSA), and excited state absorption (ESA) in erbium ions of the EDF, which produces green light signals, wherein the majority of the pump signals have a wavelength at which the probability of occurrence of ESA in the EDF is greater than the probability of occurrence of GSA in the EDF. The majority of the pump signals may have a wavelength in the range approximately 920nm to approximately 980nm, or in the region of 960nm. An erbium doped fibre amplifier (EDFA) (1) for amplifying traffic-carrying signals may be pumped by green light signals produced by this method. A laser which produces green light signals may be constructed, which comprises at least one EDF, coupled to at least one pump source to receive pump signals therefrom, which cause GSA, and ESA in erbium ions of the EDF, which produces green light signals, the majority of the pump signals having a wavelength at which the probability of occurrence of ESA in the EDF is greater than the probability of occurrence of GSA in the EDF.

2. 发明申请

WO2004040809A3 GAIN CONTROL IN OPTICAL AMPLIFIERS 审中-公开
公开(公告)号：WO2004040809A3
公开(公告)日：2004-05-13
申请号：PCT/IB2003/005115
申请日：2003-10-13
申请人： MARCONI COMMUNICATIONS SPA , FELLA, Paolo , DI MURO, Rodolfo
发明人： FELLA, Paolo , DI MURO, Rodolfo
IPC分类号： H04B10/17
摘要： A means and method for controlling the gain of a optical amplifier receiving one or more optical input signal channels has a source for generating a gain control signal, input to the optical amplifier at the opposite end to the input signal channels. The gain control signal is generated at a power level that produces stimulated Brillouin scattering (SBS) in the optical amplifier.

3. 发明申请

WO2004032383A1 RAMAN AMPLIFIER 审中-公开
标题翻译：拉曼放大器
公开(公告)号：WO2004032383A1
公开(公告)日：2004-04-15
申请号：PCT/GB2003/004195
申请日：2003-09-29
申请人： MARCONI COMMUNICATIONS LIMITED , MARCONI COMMUNICATIONS SpA , FELLA, Paolo , DI MURO, Rodolfo
发明人： FELLA, Paolo , DI MURO, Rodolfo
IPC分类号： H04B10/17
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094003 , H01S3/094096 , H01S3/1301 , H01S3/302 , H04B10/077 , H04B10/07955
摘要： A Raman amplifier for amplifying WDM radiation propagating along an optical fibre (3), said WDM radiation comprising a plurality of radiation components each having a selected waveband, comprises: a plurality of optical radiation generating means (10, 11) operable to generate pump radiation of a selected wavelength (λ 1 , λ 2 ) and power, said radiation being coupled into said fibre to optically amplify the WDM radiation. The amplifier is characterised by the optical radiation generating means (10, 11) being wavelength tuneable and means (5) for measuring the power of the radiation components of the WDM radiation after it has propagated along the fibre (3) and has been amplified. The wavelength and power of operation of the wavelength generating means are controlled in dependence upon the measured powers such as to make the measured powers substantially equal in magnitude and of a selected magnitude. To reduce polarisation dependent gain where the pump radiation propagates in a direction along the optical fibre that is counter to the direction of propagation of the WDM radiation, each radiation generating means (10, 11) preferably comprises a plurality of radiation sources (10a to 10c, 11a to 11b), preferably three, each one being operable to generate radiation having the same wavelength but with a different state of polarisation. Advantageously the three radiation sources (10a to 10c, 11a to 11c) are operable to generate radiation whose state of polarisation is shifted by 60° to each other and which are combined using a polarisation maintaining multiplexer (10d, 11d).
摘要翻译：一种用于放大沿着光纤（3）传播的WDM辐射的拉曼放大器，所述WDM辐射包括多个具有选定波段的辐射分量，包括：多个光辐射产生装置（10,11），可操作以产生泵浦辐射（λ1，λ2）和功率，所述辐射被耦合到所述光纤中以光学放大WDM辐射。放大器的特征在于可波长可调的光辐射产生装置（10,11），以及用于在沿着光纤（3）传播并且已被放大之后测量WDM辐射的辐射分量的功率的装置（5）。根据所测量的功率来控制波长产生装置的波长和功率，以使所测量的功率在幅度和选定幅度上基本相等。为了减少偏振相关增益，其中泵浦辐射在沿着光纤的方向上传播，与WDM辐射的传播方向相反，每个辐射产生装置（10,11）优选地包括多个辐射源（10a至10c），11a至11b），优选三个，每个可操作以产生具有相同波长但具有不同偏振状态的辐射。有利地，三个辐射源（10a至10c，11a至11c）可操作以产生彼此偏振60°并且使用偏振保持多路复用器（10d，11d）组合的辐射。

4. 发明申请

WO2003079066A3 OPTICAL AMPLIFIER 审中-公开
公开(公告)号：WO2003079066A3
公开(公告)日：2003-09-25
申请号：PCT/IB2003/001470
申请日：2003-03-14
申请人： MARCONI COMMUNICATIONS SpA , FELLA, Paolo
发明人： FELLA, Paolo
IPC分类号： H01S3/094
摘要： An optical amplifier (10) comprises at least one strip (13) of doped fiber passed through by optical signals which are to be amplified and pump lasers (14, 14') generating pump signals passing through the doped fiber strip to produce the amplification effect. Before being input into the doped fiber (13) the appropriately polarized pump signals pass through a strip of polarizing fiber (16, 16') with polarization such as to offer low attenuation to the signal output by the laser toward the doped fiber. By means thereof high attenuation filtering of residual signals issuing from the doped fiber towards the laser and which were found to disturb operation of the laser and the performance of the pump and known optical amplifiers is obtained.

5. 发明申请

WO2003069810A2 OPTICAL FIBER COMMUNICATION SYSTEMS WITH BRILLOUIN EFFECT AMPLIFICATION 审中-公开
标题翻译：光纤通信系统具有双向效能放大
公开(公告)号：WO2003069810A2
公开(公告)日：2003-08-21
申请号：PCT/IB2003/000981
申请日：2003-02-12
申请人： MARCONI COMMUNICATIONS SPA , FELLA, Paolo , QUARGNOLO, Orietta , BELLOSI, Antonio
发明人： FELLA, Paolo , QUARGNOLO, Orietta , BELLOSI, Antonio
IPC分类号： H04B10/10
CPC分类号： H04B10/2916 , H01S3/302
摘要： An optical fiber transmission system (10) comprising a transmitter (11) and a receiver (12) at the two ends of an optical fiber (13). The transmitter comprises a signal laser (14) for generation of a transmission signal and the receiver comprises a pump laser (18) for production of a pump signal, which is incorporated in the fiber (13) in a direction opposite to that of the transmission signal to obtain amplification using the Brillouin effect of the transmission signal. The central frequency, Fsign, of the transmission signal of the signal laser (14) and the central frequency, Fpump, of the pump signal of the pump laser (18) are such that (Fpump±20MHz)- (Fsign±20MHz)=10GHz±0.1GHz, and the two lasers are controlled locally such that the maximum variation Δfsign, of the central frequency of the transmission signal, the maximum variation, Δfpump, of the central frequency of the pump signal, and the bandwidth, Bfsign, of the transmission signal have the following relationship Bfsign + Δfsign + Δfpump= 100MHz.
摘要翻译：光纤传输系统10包括在光纤13的两端处的发射器11和接收器12.发射器包括用于产生传输信号的信号激光器14，接收器包括用于产生泵的泵激光器18 信号，其以与发送信号的方向相反的方向结合在光纤13中，以使用发送信号的布里渊效应来获得放大。信号激光器14的发送信号的中心频率F sign和泵激光器18的泵浦信号的中心频率Fpump使得Fpump±20MHz-Fsign±20MHz = 10GHz±0.1GHz，并且两个激光器被本地控制，使得传输信号的中心频率，泵浦信号的中心频率的最大变化量DELTAfpump，以及传输信号的带宽Bfsign的最大变化量DELTAfsign具有以下关系Bfsign + DELTAfsign + DELTAfpump = 100MHz。

6. 发明申请

WO2003079066A2 OPTICAL AMPLIFIER 审中-公开
标题翻译：光学放大器
公开(公告)号：WO2003079066A2
公开(公告)日：2003-09-25
申请号：PCT/IB2003/001470
申请日：2003-03-14
申请人： MARCONI COMMUNICATIONS SpA , FELLA, Paolo
发明人： FELLA, Paolo
IPC分类号： G02B6/00
CPC分类号： H01S3/094003 , H01S3/094011
摘要： An optical amplifier (10) comprises at least one strip (13) of doped fiber passed through by optical signals which are to be amplified and pump lasers (14, 14') generating pump signals passing through the doped fiber strip to produce the amplification effect. Before being input into the doped fiber (13) the appropriately polarized pump signals pass through a strip of polarizing fiber (16, 16') with polarization such as to offer low attenuation to the signal output by the laser toward the doped fiber. By means thereof high attenuation filtering of residual signals issuing from the doped fiber towards the laser and which were found to disturb operation of the laser and the performance of the pump and known optical amplifiers is obtained.
摘要翻译：光放大器（10）包括至少一个掺杂光纤带（13），所述掺杂光纤带通过将被放大的光信号，并且泵浦激光器（14,14'）产生泵浦信号，所述泵浦信号穿过掺杂光纤带产生放大效应。在输入到掺杂光纤（13）之前，适当偏振的泵浦信号通过具有偏振的偏振光纤（16,16'）带，以便向激光器输出的信号提供对掺杂光纤的低衰减。借助于此，从掺杂光纤向激光器发出的残余信号的高衰减滤波被发现会干扰激光器的工作以及泵和已知光放大器的性能。

7. 发明申请

WO2003094394A1 OPTICAL FIBER AMPLIFICATION SYSTEM 审中-公开
标题翻译：光纤放大系统
公开(公告)号：WO2003094394A1
公开(公告)日：2003-11-13
申请号：PCT/IB2003/001949
申请日：2003-04-30
申请人： MARCONI COMMUNICATIONS SPA , FELLA, Paolo
发明人： FELLA, Paolo
IPC分类号： H04B10/17
CPC分类号： H04B10/2916 , H01S3/302
摘要： An optical fiber amplifier pumping technique based on multiple Stimulated Raman Scattering (SRS) for optical communication systems that comprises a plurality of pump signals with increasing wavelength which are injected into the fiber. The wavelengths of such pump signals are such that in cascade each pump signal of the plurality is amplified by the pump signal of wavelength immediately shorter while it amplifies that with wavelength immediately higher with the pump signal of highest wavelength which, in turn, pumps a remote rare earth doped optical fiber amplifier.
摘要翻译：一种基于用于光通信系统的多个激励拉曼散射（SRS）的光纤放大器泵浦技术，其包括注入到光纤中的多个波长增加的泵浦信号。这种泵浦信号的波长使得在级联中，多个的每个泵浦信号被波长的泵浦信号立即放大，同时其波长随着最高波长的泵浦信号立即更高的波长而放大，而泵浦信号反过来泵送远程稀土掺杂光纤放大器。

8. 发明申请

WO2003069810A3 OPTICAL FIBER COMMUNICATION SYSTEMS WITH BRILLOUIN EFFECT AMPLIFICATION 审中-公开
公开(公告)号：WO2003069810A3
公开(公告)日：2003-08-21
申请号：PCT/IB2003/000981
申请日：2003-02-12
申请人： MARCONI COMMUNICATIONS SPA , FELLA, Paolo , QUARGNOLO, Orietta , BELLOSI, Antonio
发明人： FELLA, Paolo , QUARGNOLO, Orietta , BELLOSI, Antonio
IPC分类号： H04B10/17
摘要： An optical fiber transmission system (10) comprising a transmitter (11) and a receiver (12) at the two ends of an optical fiber (13). The transmitter comprises a signal laser (14) for generation of a transmission signal and the receiver comprises a pump laser (18) for production of a pump signal, which is incorporated in the fiber (13) in a direction opposite to that of the transmission signal to obtain amplification using the Brillouin effect of the transmission signal. The central frequency, Fsign, of the transmission signal of the signal laser (14) and the central frequency, Fpump, of the pump signal of the pump laser (18) are such that (Fpump±20MHz)- (Fsign±20MHz)=10GHz±0.1GHz, and the two lasers are controlled locally such that the maximum variation Δfsign, of the central frequency of the transmission signal, the maximum variation, Δfpump, of the central frequency of the pump signal, and the bandwidth, Bfsign, of the transmission signal have the following relationship Bfsign + Δfsign + Δfpump= 100MHz.

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