公开(公告)号：US06538788B2

公开(公告)日：2003-03-25

申请号：US09759525

申请日：2001-01-16

申请人： Pierluigi Franco ,  Michele Midrio ,  Marco Romagnoli

发明人： Pierluigi Franco ,  Michele Midrio ,  Marco Romagnoli

IPC分类号： H04B1000

CPC分类号： H04B10/2519 ,  H04B10/2525

摘要： A system for providing noise reduction in a long-distance telecommunications system is disclosed. A transmitter generates an optical signal. An optical link includes an optical amplifier that transmits the optical signal in a pre-established direction of propagation with substantially compensated dispersion to have an associated optical noise. A receiver is configured to receive a noisy optical signal including the transmitted optical signal and an optical noise signal. The receiver includes a photodetecting device that is configured to generate an electronic signal correlated with the noisy optical signal. The electronic signal being associated with a quality parameter (Q) that depends on said optical noise signal and distortion of the optical signal in the optical link. The optical link further includes a dispersive and nonlinear filtering device that has a normal dispersion and nonlinear component. The filtering device is placed along said optical link and has an associated normal dispersion parameter &bgr;2,NORM•L and a nonlinearity parameter &ggr; operatively selected so as to increase the quality parameter by at least 1 dB.

摘要翻译： 公开了一种用于在远程电信系统中提供降噪的系统。 发射机产生光信号。 光链路包括光放大器，其以预先建立的传播方向以基本上被补偿的色散传输光信号以具有相关联的光噪声。 接收机被配置为接收包括所发送的光信号和光噪声信号的噪声光信号。 接收机包括被配置为产生与噪声光信号相关的电子信号的光检测装置。 电子信号与取决于所述光学噪声信号和光学链路中的光信号的失真的质量参数（Q）相关联。 光链路还包括具有正常色散和非线性分量的色散和非线性滤波装置。 过滤装置沿着所述光学链路放置并且具有相关联的正常色散参数β2，NORM.L和可操作地选择的非线性参数γ，以便将质量参数提高至少1dB。

公开(公告)号：US06867902B2

公开(公告)日：2005-03-15

申请号：US10135772

申请日：2002-05-01

申请人： Marco Romagnoli ,  Luciano Socci ,  Raffaele Corsini ,  Michele Midrio

发明人： Marco Romagnoli ,  Luciano Socci ,  Raffaele Corsini ,  Michele Midrio

IPC分类号： G02B6/122 ,  G02F1/35 ,  G02F1/39

CPC分类号： B82Y20/00 ,  G02B6/1225 ,  G02F1/3534 ,  G02F1/3544 ,  G02F1/395 ,  G02F2202/32

摘要： Device for performing a parametric process, comprising a substantially periodic photonic crystal structure comprising a plurality of unitary cells each comprising a first layer having a first refractive index n1 and a first length L1, a second layer having a second refractive index n2, with n1 different from n2, and a second length L2, a third layer having a third refractive index n3, with n3 different from n2, and a third length L3 and a fourth layer having a fourth refractive index n4, with n4 different from n1 and from n3, and a fourth length L4,  wherein at least one among the first, the second, the third and the fourth layers has a non-linearity of the χ2 or χ3 type; at least one of the following conditions is met:  a) n1 is different from n3;  b) n2 is different from n4;  c) L1 is different from L3;  d) L2 is different from L4; and n1, n2, n3, n4, L1, L2, L3, L4 have such values as to perform the parametric process in phase matching conditions.

摘要翻译： 用于执行参数过程的装置，包括基本上周期性的光子晶体结构，其包括多个单元，每个单元包括具有第一折射率n1和第一长度L1的第一层，具有第二折射率n2的第二层，其中n1不同于 n2，第二长度L2，第三折射率n3，n3不同于n2的第三层，第三长度L3和第四折射率n4的第四层，n4与n3不同，n3不同 第四长度L4，其中第一，第二，第三和第四层中的至少一个具有chi2或chi3类型的非线性;满足以下条件中的至少一个：a）n1不同于n3; b）n2不同于n4; c）L1不同于L3; d）L2不同于L4; 和n1，n2，n3，n4，L1，L2，L3，L4具有在相位匹配条件下执行参数处理的值。

公开(公告)号：US20050259325A1

公开(公告)日：2005-11-24

申请号：US10518473

申请日：2002-07-31

申请人： Silvia Ghidini ,  Luciano Socci ,  Marco Romagnoli ,  Pierluigi Franco

发明人： Silvia Ghidini ,  Luciano Socci ,  Marco Romagnoli ,  Pierluigi Franco

IPC分类号： G02F1/09 ,  G02B5/30 ,  G02B27/28

CPC分类号： G02F1/093

摘要： Bidirectional isolating devices including non-reciprocal rotators (i.e. Faraday rotators) and wavelength selective reciprocal polarization rotators are disclosed. Each wavelength selective rotator behaves like a half-wave retarder in a first frequency range and behaves like a full-wave retarder in a second frequency range, according to a substantially periodic transfer function. The rotation has a predetermined number of birefringent elements (e.g. waveplates), the thickness and the orientation of which are chosen so as to obtain a transition between the half-wave retarder behavior and the full-wave retarder behavior in a frequency range lower than or equal to 40% of the period of the transfer function. In order to satisfy such a requirement, a relatively high number of birefringent elements is required, i.e. at least the five birefringent elements. Advantageously, the isolating device may comply with any allocation scheme for the opposite propagating signals.

摘要翻译： 公开了包括非互易旋转器（即法拉第旋转器）和波长选择性往复偏振旋转器的双向隔离装置。 每个波长选择旋转器在第一频率范围内表现得像半波延迟器，并且根据基本上周期性的传递函数在第二频率范围内表现得像全波延迟器。 旋转具有预定数量的双折射元件（例如波片），其厚度和取向被选择为在半波延迟器行为和全波延迟器行为之间的转变在低于或等于 等于传递函数的40％。 为了满足这种要求，需要相对高数量的双折射元件，即至少五个双折射元件。 有利地，隔离装置可以符合相反传播信号的任何分配方案。

公开(公告)号：US07526157B2

公开(公告)日：2009-04-28

申请号：US11791611

申请日：2004-12-06

申请人： Roberto Aldeghi ,  Pierluigi Franco ,  Giorgio Grasso ,  Marco Romagnoli ,  Francesco Tassone

发明人： Roberto Aldeghi ,  Pierluigi Franco ,  Giorgio Grasso ,  Marco Romagnoli ,  Francesco Tassone

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02B6/2852 ,  G02B6/4203 ,  G02B6/4206 ,  G02B6/4246

摘要： Point-to-point link for the transmission of digital signals includes two opto-electronic conversion apparatuses and an optical cable including at least one optical fiber having two terminal portions, each opto-electronic conversion apparatus including an opto-electronic device optically coupled to a respective terminal portion between the two terminal portions of the at least one optical fiber, wherein at least one of the two opto-electronic conversion apparatuses is adapted to keep the respective terminal portion of the optical fiber in bent position with a bending radius R, where 1.5 mm≦R≦2.5 mm, and to keep the respective opto-electronic device optically coupled to the bent terminal portion in order to allow the transmission of the digital signals between the optical fiber and the at least one of the two opto-electronic conversion apparatuses; and at least the bent terminal portion of the at least one optical fiber is such as to satisfy the following relationship r/R

摘要翻译： 用于传输数字信号的点对点链路包括两个光电转换装置和包括至少一个具有两个端子部分的光纤的光缆，每个光电转换装置包括光耦合到 所述至少一个光纤的两个端子部分之间的相应端子部分，其中两个光电转换装置中的至少一个适于将光纤的相应端子部分保持在弯曲半径R的弯曲位置，其中 为了使光纤和两个光电耦合器件中的至少一个之间的数字信号的传输能够保持光耦合到弯曲的端子部分的各个光电器件， 电子转换装置; 并且至少一个光纤的弯曲端子部分至少满足r / R <0.07 * n /（35 + n）的关系，其中n是应力腐蚀敏感性因子，r是半径 光纤的包层。

公开(公告)号：US07242517B2

公开(公告)日：2007-07-10

申请号：US10518473

申请日：2002-07-31

申请人： Silvia Ghidini ,  Luciano Socci ,  Marco Romagnoli ,  Pierluigi Franco

发明人： Silvia Ghidini ,  Luciano Socci ,  Marco Romagnoli ,  Pierluigi Franco

IPC分类号： H01S4/00 ,  G02B5/30 ,  G02B27/28

CPC分类号： G02F1/093

摘要： Bidirectional isolating devices including non-reciprocal rotators (i.e. Faraday rotators) and wavelength selective reciprocal polarization rotators are disclosed. Each wavelength selective rotator behaves like a half-wave retarder in a first frequency range and behaves like a full-wave retarder in a second frequency range, according to a substantially periodic transfer function. The rotation has a predetermined number of birefringent elements (e.g. waveplates), the thickness and the orientation of which are chosen so as to obtain a transition between the half-wave retarder behavior and the full-wave retarder behavior in a frequency range lower than or equal to 40% of the period of the transfer function. In order to satisfy such a requirement, a relatively high number of birefringent elements is required, i.e. at least the five birefringent elements. Advantageously, the isolating device may comply with any allocation scheme for the opposite propagating signals.

摘要翻译： 公开了包括非互易旋转器（即法拉第旋转器）和波长选择性往复偏振旋转器的双向隔离装置。 每个波长选择旋转器的行为类似于第一频率范围内的半波延迟器，并且根据基本上周期的传递函数在第二频率范围内表现为类似于全波延迟器。 旋转具有预定数量的双折射元件（例如波片），其厚度和取向被选择为在半波延迟器行为和全波延迟器行为之间的转变在低于或等于 等于传递函数的40％。 为了满足这种要求，需要相对高数量的双折射元件，即至少五个双折射元件。 有利地，隔离装置可以符合相反传播信号的任何分配方案。

公开(公告)号：US20080219621A1

公开(公告)日：2008-09-11

申请号：US11791611

申请日：2004-12-06

申请人： Roberto Aldeghi ,  Pierluigi Franco ,  Giorgio Grasso ,  Marco Romagnoli ,  Francesco Tassone

发明人： Roberto Aldeghi ,  Pierluigi Franco ,  Giorgio Grasso ,  Marco Romagnoli ,  Francesco Tassone

IPC分类号： G02B6/42

CPC分类号： G02B6/2852 ,  G02B6/4203 ,  G02B6/4206 ,  G02B6/4246

摘要： Point-to-point link for the transmission of digital signals includes two opto-electronic conversion apparatuses and an optical cable including at least one optical fiber having two terminal portions, each opto-electronic conversion apparatus including an opto-electronic device optically coupled to a respective terminal portion between the two terminal portions of the at least one optical fiber, wherein at least one of the two opto-electronic conversion apparatuses is adapted to keep the respective terminal portion of the optical fiber in bent position with a bending radius R, where 1.5 mm≦R≦2.5 mm, and to keep the respective opto-electronic device optically coupled to the bent terminal portion in order to allow the transmission of the digital signals between the optical fiber and the at least one of the two opto-electronic conversion apparatuses; and at least the bent terminal portion of the at least one optical fiber is such as to satisfy the following relationship r/R

摘要翻译： 用于传输数字信号的点对点链路包括两个光电转换装置和包括至少一个具有两个端子部分的光纤的光缆，每个光电转换装置包括光耦合到 所述至少一个光纤的两个端子部分之间的相应端子部分，其中两个光电转换装置中的至少一个适于将光纤的相应端子部分保持在弯曲半径R的弯曲位置，其中 为了使光纤和两个光电耦合器件中的至少一个之间的数字信号的传输能够保持光耦合到弯曲的端子部分的各个光电器件， 电子转换装置; 并且至少一个光纤的弯曲端子部分至少满足r / R <0.07 * n /（35 + n）的关系，其中n是应力腐蚀敏感性因子，r是半径 光纤的包层。

公开(公告)号：US20120106891A1

公开(公告)日：2012-05-03

申请号：US13324198

申请日：2011-12-13

申请人： Luciano SOCCI ,  Paola Galli ,  Silvia Ghidini ,  Marco Romagnoli

发明人： Luciano SOCCI ,  Paola Galli ,  Silvia Ghidini ,  Marco Romagnoli

IPC分类号： G02B6/293

CPC分类号： G02B6/29343 ,  G02B6/12007 ,  G02B6/29355 ,  G02B6/29395 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/021

摘要： An optical device includes an optical splitter having a resonant structure including at least a resonator, the optical splitter being adapted to receive at an input port a WDM optical signal and to output at first and second output ports, respectively, a first and a second portion of the optical signal, the second portion including the channels spaced by an integer multiple of the WDM frequency spacing; an optical combiner adapted to receive at first and second input ports, respectively, the first and the second portions and adapted to output them at an output port; a first optical path optically connecting the first output port to the first input port; a second optical path optically connecting the second output port to the second input port; and an optical filter optically coupled to the second optical path, wherein the optical combiner includes at least a resonator.

摘要翻译： 光学装置包括具有至少包括谐振器的谐振结构的光分路器，所述光分路器适于在输入端口处接收WDM光信号并分别在第一和第二输出端口处输出第一和第二部分 所述第二部分包括以WDM频率间隔的整数倍间隔的信道; 适于在第一和第二输入端口分别接收第一和第二部分并适于在输出端口输出它们的光学合成器; 第一光路，将第一输出端口光学地连接到第一输入端口; 光学连接第二输出端口到第二输入端口的第二光路; 以及光学耦合到所述第二光路的光学滤波器，其中所述光组合器至少包括谐振器。

公开(公告)号：US20110116741A1

公开(公告)日：2011-05-19

申请号：US12919578

申请日：2008-02-29

申请人： Gaia Cevini ,  Paola Galli ,  Stefano Lorenzotti ,  Marco Piazza ,  Marco Romagnoli ,  Luciano Socci ,  Lorenzo Bolla ,  Silvia Ghidini

发明人： Gaia Cevini ,  Paola Galli ,  Stefano Lorenzotti ,  Marco Piazza ,  Marco Romagnoli ,  Luciano Socci ,  Lorenzo Bolla ,  Silvia Ghidini

IPC分类号： G02B6/30

CPC分类号： G02B6/305 ,  G02B6/1228

摘要： An optical mode transformer comprises a first waveguide including a first core, a first cladding and an end facet configured to be coupled to an optical fiber. The transformer further includes a second waveguide comprising a second core, a second cladding and an end directly coupled to an end of the first waveguide. A third waveguide comprises a third core and a third cladding, and is arranged with respect to the second waveguide so as to realize an evanescent optical coupling with the second waveguide. The third core includes a tapered region wherein evanescent coupling takes place, and wherein a refractive index contrast of the first waveguide is less than a refractive index contrast of the second waveguide, the refractive index contrast of the second waveguide is less than a refractive index contrast of the third waveguide, and the refractive index contrast of the third waveguide is not less than 18%.

摘要翻译： 光学模式变压器包括第一波导，其包括第一芯，第一包层和被配置为耦合到光纤的端面。 变压器还包括第二波导，其包括第二芯，第二包层和直接耦合到第一波导的端部的端部。 第三波导包括第三芯和第三包层，并且相对于第二波导布置，以实现与第二波导的渐逝光耦合。 第三芯包括其中发生ev逝耦合的锥形区域，并且其中第一波导的折射率对比度小于第二波导的折射率对比度，第二波导的折射率对比度小于折射率对比度 并且第三波导的折射率对比度不小于18％。

公开(公告)号：US20050226561A1

公开(公告)日：2005-10-13

申请号：US10506542

申请日：2002-03-06

申请人： Marco Romagnoli ,  Maurizio Tormen ,  Camilla Bonati

发明人： Marco Romagnoli ,  Maurizio Tormen ,  Camilla Bonati

IPC分类号： G02B6/12 ,  G02B1/02 ,  G02B6/122 ,  G02B6/125 ,  G02B6/26

CPC分类号： B82Y20/00 ,  G02B6/1225 ,  G02B6/125 ,  G02B2006/12104

摘要： A device for varying the direction of an optical beam. A first waveguide is directed along a first direction, a second waveguide is directed along a second direction different from the first direction, and a bending region is interposed between the first and the second waveguide. The bending region has a photonic crystal having a regular periodicity and at least a first and a second crystal axes substantially aligned with the first and second directions, and a reflecting surface delimiting the photonic crystal and so positioned and oriented as to reflect an optical beam coming from the first waveguide toward the second waveguide

摘要翻译： 用于改变光束方向的装置。 沿着第一方向引导第一波导，沿着与第一方向不同的第二方向引导第二波导，并且在第一和第二波导之间插入有弯曲区域。 弯曲区域具有规则周期的光子晶体和至少基本上与第一和第二方向对齐的第一和第二晶轴，以及限定光子晶体的反射表面，并且定位和定向成反射来自光束的光束 从第一波导到第二波导

公开(公告)号：US08494318B2

公开(公告)日：2013-07-23

申请号：US12513993

申请日：2006-11-09

申请人： Lorenzo Bolla ,  Paola Galli ,  Silvia Ghidini ,  Giorgio Grasso ,  Marco Romagnoli ,  Luciano Socci

发明人： Lorenzo Bolla ,  Paola Galli ,  Silvia Ghidini ,  Giorgio Grasso ,  Marco Romagnoli ,  Luciano Socci

IPC分类号： G02B6/42 ,  H04J14/02

CPC分类号： G02B6/29395 ,  G02B6/12007 ,  G02B6/29343 ,  G02B6/29383 ,  H04J14/0206 ,  H04J14/021

摘要： A method of filtering an optical signal includes operating an optical filter having resonators, each having a respective free spectral range and a respective resonance falling within a first frequency band, first tuning at least one resonator with respect to at least another resonator to obtain a separation between any resonance of at least one resonator falling within an optical bandwidth with respect to a resonance of at least another resonator nearest to the any resonance, second tuning all the resonators of the optical filter so as to move all respective resonances by a respective frequency interval greater than a frequency spacing, and third tuning the at least one resonator and the at least another resonator such that a further respective resonance of each one of the resonators falls within a second frequency band, different from the first frequency band.

摘要翻译： 一种对光信号进行滤波的方法包括操作具有谐振器的滤光器，每个滤光器具有相应的自由光谱范围和落在第一频带内的相应谐振器，首先调谐至少一个谐振器至少另一谐振器以获得分离 在至少一个谐振器的至少一个谐振器相对于至少另一个最接近任何谐振的谐振器的谐振之间的谐振之间的任何谐振之间，对光滤波器的所有谐振器进行二次调谐，以便将所有相应的谐振移动相应的频率间隔 大于频率间隔，以及对所述至少一个谐振器和所述至少另一个谐振器进行第三调谐，使得每个所述谐振器的另外的相应谐振落入与所述第一频带不同的第二频带内。