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公开(公告)号：US08781337B2
公开(公告)日：2014-07-15
申请号：US13226149
申请日：2011-09-06
CPC分类号： H04B10/505 , H04B10/5055 , H04B10/5561
摘要： A method of phase modulating optical radiation by the steps of phase modulating the optical radiation by using a modulator having an extinction ratio in order to provide a multilevel phase shift key signal, and applying to each optical pulse a phase-shift having an absolute value depending on the extinction ratio and a sign depending, for each of the optical pulses, on the respective optical phase value. An apparatus implementing the method is also disclosed.
摘要翻译： 通过使用具有消光比的调制器对光辐射进行相位调制以便提供多电平相移键信号的步骤来相位调制光辐射的方法，并且向每个光脉冲施加具有绝对值的绝对值的相移 对于每个光脉冲，消光比和相应的光学相位值的符号。 还公开了一种实现该方法的装置。
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12.发明授权公开(公告)号：US08200087B2
公开(公告)日：2012-06-12
申请号：US13038990
申请日：2011-03-02
申请人： Pierpaolo Boffi , Lucia Marazzi , Paolo Martelli , Mario Martinelli , Aldo Righetti , Rocco Siano
发明人： Pierpaolo Boffi , Lucia Marazzi , Paolo Martelli , Mario Martinelli , Aldo Righetti , Rocco Siano
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , G02F1/0136 , H04J14/02
摘要： 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.
摘要翻译： 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。
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13.发明授权公开(公告)号：US07917031B2
公开(公告)日：2011-03-29
申请号：US11665466
申请日：2004-10-22
申请人： Pierpaolo Boffi , Lucia Marazzi , Paolo Martelli , Mario Martinelli , Aldo Righetti , Rocco Siano
发明人： Pierpaolo Boffi , Lucia Marazzi , Paolo Martelli , Mario Martinelli , Aldo Righetti , Rocco Siano
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , G02F1/0136 , H04J14/02
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20070274731A1
公开(公告)日：2007-11-29
申请号：US10592032
申请日：2004-03-10
IPC分类号： H04B10/155
CPC分类号： H04B10/505 , H04B10/5055 , H04B10/5561
摘要： A method of phase modulating optical radiation by the steps of phase modulating the optical radiation by using a modulator having an extinction ratio in order to provide a multilevel phase shift key signal, and applying to each optical pulse a phase-shift having an absolute value depending on the extinction ratio and a sign depending, for each of the optical pulses, on the respective optical phase value. An apparatus implementing the method is also disclosed.
摘要翻译： 通过使用具有消光比的调制器对光辐射进行相位调制以便提供多电平相移键信号的步骤来相位调制光辐射的方法，并且向每个光脉冲施加具有绝对值的绝对值的相移 对于每个光脉冲，消光比和相应的光学相位值的符号。 还公开了一种实现该方法的装置。
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公开(公告)号：US20060140636A1
公开(公告)日：2006-06-29
申请号：US10536807
申请日：2002-11-29
IPC分类号： H04B10/12
CPC分类号： H04B10/25137 , H04B10/25253
摘要： An optical communication system has a transmitter generating a phase-modulated optical signal (Sa, Sb, . . . , Sk); a receiver for receiving the phase-modulated optical signal; an optical communication link between the transmitter section and the receiver section. The optical communication link is a dispersion-managed optical communication link having dispersion-compensating elements propagating the phase-modulated optical signal at substantially constant optical power. The receiver has a dispersive element having a prescribed dispersion, the dispersive element receiving and converting the phase-modulated optical signal into a corresponding intensity-modulated optical signal, and an optical intensity detector fed with the intensity-modulated optical signal.
摘要翻译： 光通信系统具有产生相位调制光信号（Sa，Sb ...，Sk）的发射机; 用于接收相位调制光信号的接收机; 在发射机部分和接收机部分之间的光通信链路。 光通信链路是色散管理的光通信链路，其色散补偿元件以基本恒定的光功率传播相位调制的光信号。 接收器具有具有规定色散的色散元件，色散元件接收并将相位调制光信号转换为对应的强度调制光信号，以及馈送有强度调制光信号的光强度检测器。
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公开(公告)号：US06584261B2
公开(公告)日：2003-06-24
申请号：US09988624
申请日：2001-11-20
IPC分类号： G02B600
CPC分类号： G02F3/00 , H01S3/102 , H01S3/1022
摘要： An apparatus for gating an optical signal comprising: an input stage arranged to receive and combine first and second optical control signals (ON, OFF) of first and second wavelengths, and an optical signal (SIGNAL IN) to be gated of a third wavelength. A gain medium is arranged to receive the signals SIGNAL IN, ON and OFF from the input stage. The gain medium (e.g. YAG) comprises a transition metal dopant (e.g. Cr4+) that has an excited state populatable by the first control signal and depopulatable by the second control signal to allow selective amplification of the optical signal to be gated by stimulated emission from the excited state responsive to the control signals. The amplification process has a very fast switch-on time that is several orders of magnitude faster than in prior art devices based on the rare earth dopant Er3+.
摘要翻译： 一种用于选通光信号的装置，包括：输入级，被布置为接收和组合第一和第二波长的第一和第二光控制信号（ON，OFF）以及要被选通第三波长的光信号（SIGNAL IN）。 增益介质被布置成从输入级接收信号IN，ON和OFF。 增益介质（例如YAG）包括过渡金属掺杂剂（例如Cr4 +），其具有可被第一控制信号吸引的激发态，并且可被第二控制信号抑制，以允许通过受激发射 激发状态响应于控制信号。 放大过程具有非常快的接通时间，其比基于稀土掺杂剂Er3 +的现有技术器件快几个数量级。
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公开(公告)号：US5268739A
公开(公告)日：1993-12-07
申请号：US803485
申请日：1991-12-04
摘要： In a laser apparatus for measuring the velocity of a fluid, a measurement laser light beam (M) fed into the fluid and scattered by a particle within the fluid is made to interfere with a reference laser light beam (R) to generate an interference signal based on the velocity of the particle; the apparatus comprises a low-coherence laser source (10) and interferometric means (11, 12) which split the light beam of the laser source (10) into the stated reference light beam (R) and measurement light beam (M), and cause the reference light beam (R) derived from the laser source (10) to interfere with the backscattered component resulting from the scattering of the measurement light beam (M).
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公开(公告)号：US20100276576A1
公开(公告)日：2010-11-04
申请号：US12670864
申请日：2008-07-25
CPC分类号： G01K11/32
摘要： A filter for an optical fibre temperature sensor comprising at least one first and one second optical filter for filtering an optical pulse reflected by said optical fibre, characterised in that said at least one first and one second optical filter comprise standard commercial filters complying with ITU specifications, said optical pulse lying within the range from 1570 nm to 1580 nm.
摘要翻译： 一种用于光纤温度传感器的滤光器，包括至少一个第一和第二滤光器，用于对由所述光纤反射的光脉冲进行滤波，其特征在于，所述至少一个第一和第二滤光器包括符合ITU规范的标准商业滤波器 所述光脉冲在1570nm至1580nm的范围内。
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公开(公告)号：US20100220765A1
公开(公告)日：2010-09-02
申请号：US12670869
申请日：2008-07-25
申请人： Mario Martinelli , Riccardo Belli
发明人： Mario Martinelli , Riccardo Belli
IPC分类号： G01K11/32
CPC分类号： G01K11/32
摘要： An optical fibre temperature sensor comprising: an optical pulse generator; an optical fibre into which said optical pulses are fed; an optical receiver to receive said optical pulses reflected by said optical fibre and to convert them into an electrical signal; a processor which receives said electrical signal and determines the temperature along said optical fibre; said optical receiver comprising a first filter and a second filter to filter said optical pulse reflected by said optical fibre, characterised in that said first and said second filters filter two adjacent portions of anti-Stokes optical signals or of Stokes optical signals
摘要翻译： 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，所述第一和第二滤波器滤除反斯托克斯光信号或斯托克斯光信号的两个相邻部分
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公开(公告)号：US20080050063A1
公开(公告)日：2008-02-28
申请号：US11791982
申请日：2004-12-15
IPC分类号： G02B6/35
CPC分类号： G02B6/3504 , G02B6/30 , G02B6/3546 , G02B6/3564
摘要： An optical switching system includes a two-dimensional arrangement of a plurality of switching elements. Each switching element includes an optical guiding structure which includes two pairs of waveguides; a driving arrangement for individually moving the switching elements between at least a first and a second position; and a first and a second input and a second output. When a generic switching element is moved in the first position, the first pair of waveguides connects a first input with a first output, and a second input with a second output; when a generic switching element is moved in the second position, the second pair of waveguides connects the first input with the second output, and the second input with the first output. In a first embodiment, the waveguides are provided on a disc shaped carrier and lie in the same plane, which disc is rotated. In a second embodiment, the two pairs of waveguides lie in different planes and the waveguide carrier plate is moved up and down for switching.
摘要翻译： 光交换系统包括多个开关元件的二维布置。 每个开关元件包括包括两对波导的光导结构; 用于在至少第一和第二位置之间单独移动所述开关元件的驱动装置; 以及第一和第二输入和第二输出。 当通用开关元件在第一位置移动时，第一对波导将第一输入与第一输出连接，第二输入与第二输出连接; 当通用开关元件在第二位置移动时，第二对波导将第一输入与第二输出连接，第二输入与第一输出相连。 在第一实施例中，波导设置在盘形载体上并且位于相同的平面中，该盘旋转。 在第二实施例中，两对波导位于不同的平面中，并且波导载体板上下移动用于切换。
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