公开(公告)号：US5072113A

公开(公告)日：1991-12-10

申请号：US579866

申请日：1990-09-07

Applicant: Mario Martinelli ,  Valeria Gusmeroli ,  Paolo Vavassori

Inventor： Mario Martinelli ,  Valeria Gusmeroli ,  Paolo Vavassori

IPC: G01D5/353 ,  G01L1/24 ,  G01N21/21 ,  G01N21/45 ,  G02B6/00 ,  G08C23/04

CPC classification number: G01L1/243 ,  G01D5/35383

Abstract: In a polarimetric fibre-optic sensor using a polarization-maintaining optical fibre with two light propagation modes, a reference light signal is fed to propagate along the optical fibre in accordance with one propagation mode, a series of measurement light signals being induced by a series of optical fibre deformation elements, to propagate along the optical fibre in accordance with the other propagation mode, each being unbalanced in time with respect to the reference light signal by an amount which is different from that of the other measurement light signals; by using particular interferometric techniques, compensating the unbalances and analyzing the signals resulting from the interference between the measurement light signals and the reference light signal it is possible to determine and locate a physical phenomenon which disturbs the optical fibre.

公开(公告)号：US4420260A

公开(公告)日：1983-12-13

申请号：US374896

申请日：1982-05-04

Applicant: Mario Martinelli

Inventor： Mario Martinelli

IPC: G01J3/45 ,  G01B9/02 ,  G01H9/00 ,  G01J9/02 ,  G02B6/00

CPC classification number: G01J9/02 ,  G01H9/006 ,  G01J2009/0226

Abstract: The invention relates to an inerferometer based on the exploitation of an optical fibre through which both the phase signal which is of interest for the measurements concerned and a reference signal are simultaneously forwarded in order that in the differential measurement the noise introduced by the optical fibre for both thermal and mechanical reasons is ruled out.

Abstract translation: 本发明涉及一种基于光纤利用的衰减器，通过该衰减器，相关信号与相关测量值有关的两个相位信号和参考信号同时转发，以便在差分测量中由光纤引入的噪声用于 排除热和机械的原因。

公开(公告)号：US09571196B2

公开(公告)日：2017-02-14

申请号：US14129903

申请日：2012-06-15

Applicant: Paolo Martelli ,  Alberto Gatto ,  Mario Martinelli

Inventor： Paolo Martelli ,  Alberto Gatto ,  Mario Martinelli

IPC: H04J14/04 ,  H04B10/2581 ,  G02B6/42

CPC classification number: H04B10/2581 ,  G02B6/4206 ,  H04J14/04

Abstract: An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other.

Abstract translation: 公开了一种光通信系统。 光通信系统包括光发射机和基本圆形的多模光纤。 光发射器包括至少两个自由空间圆形涡流的发生器，并且包括被配置为接收至少两个自由空间圆形涡流并将它们耦合到光纤的输入小面的光学元件。 光纤被配置为在输入面处接收至少两个自由空间圆形涡流，并且被配置为由其产生具有相应传播常数的至少两个对应的导向圆形涡流，其中在定义的频率处的传播常数的值是不同的 彼此。

公开(公告)号：US20140029945A1

公开(公告)日：2014-01-30

申请号：US14007354

申请日：2012-04-13

Applicant: Mario Martinelli ,  Giancarlo Gavioli ,  Paola Galli ,  Domenico Di Mola ,  Paola Parolari ,  Lucia Marazzi ,  Luca Razzetti ,  Luca Suberini ,  Domenico Campi

Inventor： Mario Martinelli ,  Giancarlo Gavioli ,  Paola Galli ,  Domenico Di Mola ,  Paola Parolari ,  Lucia Marazzi ,  Luca Razzetti ,  Luca Suberini ,  Domenico Campi

IPC: H04B10/27 ,  H04B10/532

CPC classification number: H04B10/27 ,  H01S3/08054 ,  H01S5/02284 ,  H01S5/02469 ,  H01S5/141 ,  H01S5/146 ,  H01S5/4062 ,  H01S5/4087 ,  H04B10/532

Abstract: An optical transmitter for a WDM (Wavelength Division Multiplexing) passive optical network (PON) and a WDM PON comprising such an optical transmitter are disclosed. An optical transmitter comprises first mirror and second mirrors at first end and second ends of a cavity; an optical amplifier positioned within the cavity upstream from the first mirror and for amplifying light polarized in a first polarization plane; an optical waveguide for transmitting light from the optical amplifier to the second mirror and vice versa; a first non-reciprocal polarization rotator upstream of the optical amplifier and downstream of the optical waveguide; and a second non-reciprocal polarization rotator upstream of the optical waveguide and downstream of the first mirror; wherein the first and second non-reciprocal polarization rotators rotate the polarization of the light such that light which re-enters the optical amplifier after having been reflected by the second mirror is polarized in the first polarization plane.

Abstract translation: 公开了一种用于WDM（波分复用）​​无源光网络（PON）和包括这种光发射机的WDM PON的光发射机。 光学发射器包括在腔的第一端和第二端处的第一反射镜和第二反射镜; 光放大器，位于第一反射镜上游的空腔内，用于放大在第一偏振面中偏振的光; 用于将光从光放大器传输到第二反射镜的光波导，反之亦然; 在光放大器的上游和光波导的下游的第一非倒数偏振旋转器; 以及在所述光波导上游和所述第一反射镜的下游的第二非倒数偏振旋转器; 其中所述第一和第二非可逆偏振旋转器使所述光的偏振旋转，使得在被所述第二反射镜反射之后重新进入所述光放大器的光在所述第一偏振面中被偏振。

公开(公告)号：US08311411B2

公开(公告)日：2012-11-13

申请号：US12739840

申请日：2007-12-21

Applicant: Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti

Inventor： Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti

IPC: H04B10/00 ,  H04B10/06 ,  H04B10/04 ,  H04J14/06

CPC classification number: H04J14/06 ,  G02B5/3083 ,  G02F1/0121 ,  G02F1/0136

Abstract: A method of stabilizing the state of polarization of an optical radiation comprises: 1) applying sequentially to the optical radiation a first and a second controllable phase retardation; 2) detecting an optical power of at least a first polarized portion of the optical radiation obtained after step 1; 3) applying sequentially to the optical radiation obtained after step 1 a third and a fourth controllable phase retardation; 4) detecting an optical power of a further polarized portion of the optical radiation obtained after step 3; 5) controlling, responsive to the optical power of said first polarized portion, the second controllable phase retardation so as to maintain the polarization state of the optical radiation obtained after step 1 at a defined great circle r on a Poincare sphere; 6) in case the second controllable phase retardation reaches a first limit value, commuting the first controllable phase retardation between first and second values; 7) controlling, responsive to the optical power of said further polarized portion, the fourth controllable phase retardation so as to maintain the polarization state of the optical radiation obtained after step 3 at a defined state of polarization; 8) in case the fourth controllable phase retardation reaches a second limit value, commuting the third controllable phase retardation between third and fourth values, keeping constant the first controllable phase retardation while the third controllable phase retardation is commuting between said third and fourth values. A polarization stabilizing device based on the method above is also disclosed.

Abstract translation: 稳定光辐射的偏振状态的方法包括：1）顺序地施加到光辐射第一和第二可控相位延迟; 2）检测在步骤1之后获得的光辐射的至少第一极化部分的光功率; 3）顺序地施加到在步骤1之后获得的光辐射，第三和第四可控相位延迟; 4）检测在步骤3之后获得的光辐射的另一极化部分的光功率; 5）响应于所述第一极化部分的光功率控制第二可控相位延迟，以便将在步骤1之后获得的光辐射的极化状态保持在庞加莱球上的确定的大圆圈r; 6）在第二可控相位延迟达到第一极限值的情况下，使第一和第二值之间的第一可控相位延迟相乘; 7）响应于所述另外的偏振部分的光焦度来控制第四可控相位延迟，以便将在步骤3之后获得的光辐射的偏振状态保持在限定的偏振状态; 8）在第四可控相位延迟达到第二极限值的情况下，使第三和第四值之间的第三可控相位延迟通过，在第三可控相位延迟在所述第三和第四值之间通勤时，保持第一可控相位延迟恒定。 还公开了一种基于上述方法的偏振稳定装置。

公开(公告)号：US08152370B2

公开(公告)日：2012-04-10

申请号：US12670869

申请日：2008-07-25

Applicant: Mario Martinelli ,  Riccardo Belli

Inventor： Mario Martinelli ,  Riccardo Belli

IPC: G01K11/00

CPC classification number: G01K11/32

Abstract: An optical fiber temperature sensor comprising: an optical pulse generator; an optical fiber into which said optical pulses are fed; an optical receiver to receive said optical pulses reflected by said optical fiber and to convert them into an electrical signal; a processor which receives said electrical signal and determines the temperature along said optical fiber; said optical receiver comprising a first filter and a second filter to filter said optical pulse reflected by said optical fiber, characterized in that said first and said second filters filter two adjacent portions of anti-Stokes optical signals or of Stokes optical signals.

Abstract translation: 1.一种光纤温度传感器，包括：光脉冲发生器; 所述光脉冲馈入其中的光纤; 光接收器，用于接收由所述光纤反射的所述光脉冲并将其转换成电信号; 接收所述电信号并确定沿着所述光纤的温度的处理器; 所述光接收机包括第一滤波器和第二滤波器，以对由所述光纤反射的所述光脉冲进行滤波，其特征在于，所述第一和所述第二滤波器滤除反斯托克斯光信号或斯托克斯光信号的相邻部分。

公开(公告)号：US20110170870A1

公开(公告)日：2011-07-14

申请号：US13038990

申请日：2011-03-02

Applicant: Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

Inventor： Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

IPC: H04J14/06

CPC classification number: H04J14/06 ,  G02F1/0136 ,  H04J14/02

Abstract: A device and method for stabilizing the state of polarization of polarization multiplexed optical radiation including an identified channel is disclosed. The device and method comprise providing to the polarization multiplexed optical radiation a first controllable polarization transformation to generate a first transformed optical radiation; detecting a first state of polarization of a first polarized portion with respect to a first polarization parameter; controlling the first controllable polarization transformation so that the first polarization parameter has a predetermined value independent of a polarization state of the polarization multiplexed optical radiation; providing to the first transformed optical radiation a second controllable polarization transformation to generate a second transformed optical radiation; detecting a second state of polarization of a second polarized portion; and controlling the second controllable polarization transformation so that the second state of polarization has a predefined value.

Abstract translation: 公开了一种用于稳定包括识别的通道的偏振复用光辐射的偏振状态的装置和方法。 该装置和方法包括向偏振复用光辐射提供第一可控偏振变换以产生第一变换光辐射; 检测相对于第一偏振参数的第一偏振部分的第一极化状态; 控制第一可控偏振变换，使得第一偏振参数具有与偏振复用光辐射的偏振状态无关的预定值; 向所述第一变换光辐射提供第二可控偏振变换以产生第二变换光辐射; 检测第二偏振部分的第二偏振状态; 以及控制所述第二可控偏振变换，使得所述第二极化状态具有预定义的值。

公开(公告)号：US07528360B2

公开(公告)日：2009-05-05

申请号：US11661416

申请日：2005-09-06

Applicant: Mario Martinelli ,  Paolo Martelli ,  Silvia Maria Pietralunga ,  Aldo Righetti

Inventor： Mario Martinelli ,  Paolo Martelli ,  Silvia Maria Pietralunga ,  Aldo Righetti

IPC: G02F1/01 ,  G02F1/07 ,  G02F1/00

CPC classification number: G02B6/2793 ,  G02B6/2713 ,  G02B6/2766 ,  G02B27/286 ,  G02B27/288 ,  G02F1/0136 ,  H04J14/06

Abstract: A polarization stabilizing device and method based on controlling the phase retardations of a pair of variable rotators with an optically interposed quarter-wave plate, with a controller such that the first of the variable rotators has its phase retardation switched between first and second values whenever the phase retardation of the second of the variable rotators reaches an upper or a lower limit. The upper and lower limits of the second rotator and the first and second values of the first rotator are chosen so that discontinuities in the power of the output optical radiation are avoided when the first variable rotator is switched, thereby providing endless polarization stabilization using rotators that themselves may have limited retardation ranges.

Abstract translation: 一种偏振稳定装置和方法，其基于用光学插入的四分之一波片控制一对可变旋转器的相位延迟，其中控制器使得第一可变旋转器的相位延迟在第一和第二值之间切换， 第二可变转子的相位延迟达到上限或下限。 选择第二旋转器的上限和下限以及第一旋转器的第一和第二值，使得当第一可变旋转器被切换时避免输出光辐射的功率的不连续性，从而使用旋转器提供无限极化稳定 它们本身可能具有有限的延迟范围。

公开(公告)号：US20070280689A1

公开(公告)日：2007-12-06

申请号：US11665466

申请日：2004-10-22

Applicant: Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

Inventor： Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

IPC: H04J14/06

CPC classification number: H04J14/06 ,  G02F1/0136 ,  H04J14/02

Abstract: A device and method for stabilizing the polarization of polarization multiplexed optical radiation includes an identified channel which is provided with a pilot signal. The device and method are based on providing to the polarization multiplexed optical radiation a controllable polarization transformation; measuring the optical power of a polarized portion of the identified channel downstream the polarization transformation; controlling, responsively to the optical power, the controllable polarization transformation so that the identified channel downstream the polarization transformation has a predefined polarization azimuth; providing to the optical radiation downstream the polarization transformation a further controllable polarization transformation; measuring the optical power of a polarized portion of the identified channel downstream the further controllable polarization transformation; and controlling, responsively to the optical power, the further controllable polarization transformation so that the identified channel downstream the further controllable polarization transformation has a predefined state of polarization.

Abstract translation: 用于稳定偏振复用光辐射的偏振的装置和方法包括被提供有导频信号的识别信道。 该装置和方法基于向偏振复用光辐射提供可控偏振变换; 测量在所述偏振变换下游的所识别的通道的极化部分的光功率; 响应于光功率控制可控偏振变换，使得偏振变换下游的识别信道具有预定义的偏振方位; 向偏光变换下游的光辐射提供进一步可控的偏振变换; 测量所识别的通道的偏振部分的光功率在下游的可控偏振变换; 并且响应于光功率控制进一步可控的偏振变换，使得在进一步可控偏振变换下游的识别信道具有预定的偏振状态。

公开(公告)号：US07209607B2

公开(公告)日：2007-04-24

申请号：US10497009

申请日：2001-11-30

Applicant: Mario Martinelli ,  Andrea Paganini ,  Silvia Maria Pietralunga ,  Andrea Zappettini

Inventor： Mario Martinelli ,  Andrea Paganini ,  Silvia Maria Pietralunga ,  Andrea Zappettini

IPC: G02B6/26

CPC classification number: H04Q11/0005 ,  G02B6/3542 ,  G02B6/3546 ,  G02B6/356 ,  G02B6/3578 ,  G02F1/33 ,  H04Q2011/0024 ,  H04Q2011/0035 ,  H04Q2011/0058

Abstract: Optical switch matrix having at least an input matrix port defining at least a row of the matrix, a plurality of output matrix ports defining columns of the matrix, a plurality of switching elements, each one being disposed at the intersection of at least one row and one of the columns. Each switch element in a predetermined position of the matrix, in an activated condition, connects an input matrix port to an output matrix port, the ports being correspondents respectively to the predetermined position of the matrix.

Abstract translation: 光开关矩阵具有至少限定矩阵的至少一行的输入矩阵端口，限定矩阵列的多个输出矩阵端口，多个开关元件，每个开关元件设置在至少一行和 其中一列。 矩阵的预定位置中的每个开关元件处于激活状态，将输入矩阵端口连接到输出矩阵端口，端口分别对应于矩阵的预定位置。