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公开(公告)号：US07035492B2
公开(公告)日：2006-04-25
申请号：US10977895
申请日：2004-10-29
Applicant: Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
Inventor： Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
CPC classification number: G02F1/0955 , G02F1/3136 , G02F2001/212
Abstract: Polarization independent optical isolator/circulator devices based on Mach-Zehnder interferometers. The devices utilize either polarization splitting and nonreciprocal polarization conversion or nonreciprocal phase shift within the interferometric arm. For devices with nonreciprocal phase shift, the relative phase difference is 0° in the forward propagation direction and 180° in the backward propagation direction, or vice versa, so that light goes into a bar or cross port depending on the propagation direction. The devices have advantages over previous designs in the use of inexpensive device components, simple alignment, minimal space requirement, and negligible polarization mode dispersion or polarization dependent loss. In addition, the devices can be made in a waveguide form with minimal loss and with high fabrication ease. An additional phase compensator and/or a variable attenuator can be integrated in order to relax the fabrication tolerances.
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公开(公告)号：US20050069242A1
公开(公告)日：2005-03-31
申请号：US10977895
申请日：2004-10-29
Applicant: Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
Inventor： Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
CPC classification number: G02F1/0955 , G02F1/3136 , G02F2001/212
Abstract: Polarization independent optical isolator/circulator devices based on Mach-Zehnder interferometers. The devices utilize either polarization splitting and nonreciprocal polarization conversion or nonreciprocal phase shift within the interferometric arm. For devices with nonreciprocal phase shift, the relative phase difference is 0° in the forward propagation direction and 180° in the backward propagation direction, or vice versa, so that light goes into a bar or cross port depending on the propagation direction. The devices have advantages over previous designs in the use of inexpensive device components, simple alignment, minimal space requirement, and negligible polarization mode dispersion or polarization dependent loss. In addition, the devices can be made in a waveguide form with minimal loss and with high fabrication ease. An additional phase compensator and/or a variable attenuator can be integrated in order to relax the fabrication tolerances.
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公开(公告)号：US06947619B2
公开(公告)日：2005-09-20
申请号：US11031932
申请日：2005-01-07
Applicant: Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
Inventor： Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
CPC classification number: G02F1/0955 , G02F1/3136 , G02F2001/212
Abstract: Polarization independent optical isolator/circulator devices based on Mach-Zehnder interferometers. The devices utilize either polarization splitting and nonreciprocal polarization conversion or nonreciprocal phase shift within the interferometric arm. For devices with nonreciprocal phase shift, the relative phase difference is 0° in the forward propagation direction and 180° in the backward propagation direction, or vice versa, so that light goes into a bar or cross port depending on the propagation direction. The devices have advantages over previous designs in the use of inexpensive device components, simple alignment, minimal space requirement, and negligible polarization mode dispersion or polarization dependent loss. In addition, the devices can be made in a waveguide form with minimal loss and with high fabrication ease. An additional phase compensator and/or a variable attenuator can be integrated in order to relax the fabrication tolerances.
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Patent Agency Ranking
公开(公告)号：US20050134960A1
公开(公告)日：2005-06-23
申请号：US11031932
申请日：2005-01-07
Applicant: Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
Inventor： Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
CPC classification number: G02F1/0955 , G02F1/3136 , G02F2001/212
Abstract: Polarization independent optical isolator/circulator devices based on Mach-Zehnder interferometers. The devices utilize either polarization splitting and nonreciprocal polarization conversion or nonreciprocal phase shift within the interferometric arm. For devices with nonreciprocal phase shift, the relative phase difference is 0° in the forward propagation direction and 180° in the backward propagation direction, or vice versa, so that light goes into a bar or cross port depending on the propagation direction. The devices have advantages over previous designs in the use of inexpensive device components, simple alignment, minimal space requirement, and negligible polarization mode dispersion or polarization dependent loss. In addition, the devices can be made in a waveguide form with minimal loss and with high fabrication ease. An additional phase compensator and/or a variable attenuator can be integrated in order to relax the fabrication tolerances.
Abstract translation: 基于马赫 - 曾德尔干涉仪的偏振独立光隔离器/循环器。 该器件利用干涉测量臂内的偏振分离和非互相偏振转换或非相互相移。 对于具有不可逆相移的器件，正向传播方向的相对相位差为0°，反向传播方向的相对相位差为180°，反之亦然，因此根据传播方向，光线进入条形或交叉端口。 这些器件在使用便宜的器件组件，简单校准，最小空间要求以及可忽略的偏振模色散或极化相关损耗方面具有优于先前设计的优点。 此外，器件可以以最小的损耗和高的制造容易度以波导形式制造。 可以集成附加的相位补偿器和/或可变衰减器以便放宽制造公差。
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公开(公告)号：US20110164876A1
公开(公告)日：2011-07-07
申请号：US12985934
申请日：2011-01-06
Applicant: Junichiro FUJITA , Reinald Gerhardt , Fang Wang , Jiandong Shi
Inventor： Junichiro FUJITA , Reinald Gerhardt , Fang Wang , Jiandong Shi
IPC: H04J14/02
CPC classification number: H04Q11/0005 , H04J14/0204 , H04J14/021 , H04J14/0212 , H04J14/0217 , H04J14/0219 , H04Q2011/0009 , H04Q2011/0015 , H04Q2011/0016
Abstract: An optical switch system for dropping a ROADM node is presented. The switch system includes an N×M structure having two layers. A first layer includes optical splitters, each splitter receiving a multiplexed input signal and outputting a first multiplexed output signal. A second layer includes switches receiving the first multiplexed output signals from the optical splitters and generating a second multiplexed output signal. The second multiplexed output signal is typically one of the first multiplexed output signals. An optional third layer, which includes optical filters, receives the second multiplexed output signal from the switches and produces a non-multiplexed, single-wavelength output signal.
Abstract translation: 提出了一种用于丢弃ROADM节点的光交换机系统。 开关系统包括具有两层的N×M结构。 第一层包括光分路器，每个分路器接收复用的输入信号并输出第一复用输出信号。 第二层包括接收来自光分路器的第一复用输出信号并产生第二复用输出信号的开关。 第二复用输出信号通常是第一复用输出信号之一。 包括滤光器的可选的第三层从开关接收第二多路复用输出信号，并产生非复用的单波长输出信号。
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公开(公告)号：US07167647B2
公开(公告)日：2007-01-23
申请号：US10315682
申请日：2002-12-10
Applicant: Louay Eldada , Reinald Gerhardt
Inventor： Louay Eldada , Reinald Gerhardt
CPC classification number: H04B10/077 , G02B6/12004 , G02B6/12007 , G02B6/2932 , G02B6/29322 , G02B6/29353 , G02B6/29385 , G02B6/29395 , H04B10/07955 , H04J14/0227
Abstract: The present invention is generally directed to optical signal devices that monitor the quality of an optical signal in a wavelength division multiplexing system by evaluating the information in the different wavelength channels.
Abstract translation: 本发明一般涉及通过评估不同波长信道中的信息来监视波分多路复用系统中的光信号的质量的光信号装置。
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公开(公告)号：US07043100B2
公开(公告)日：2006-05-09
申请号：US09965096
申请日：2001-09-27
Applicant: Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
Inventor： Junichiro Fujita , Reinald Gerhardt , Neil Lagali , Louay Eldada
CPC classification number: G02F1/0955 , G02F1/3136 , G02F2001/212
Abstract: Polarization independent optical isolator/circulator devices based on Mach-Zehnder interferometers. The devices utilize either polarization splitting and nonreciprocal polarization conversion or nonreciprocal phase shift within the interferometric arm. For devices with nonreciprocal phase shift, the relative phase difference is 0° in the forward propagation direction and 180° in the backward propagation direction, or vice versa, so that light goes into a bar or cross port depending on the propagation direction. The devices have advantages over previous designs in the use of inexpensive device components, simple alignment, minimal space requirement, and negligible polarization mode dispersion or polarization dependent loss. In addition, the devices can be made in a waveguide form with minimal loss and with high fabrication ease. An additional phase compensator and/or a variable attenuator can be integrated in order to relax the fabrication tolerances.
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公开(公告)号：US20100086301A1
公开(公告)日：2010-04-08
申请号：US12573063
申请日：2009-10-02
Applicant: Junichiro FUJITA , Reinald Gerhardt , Fang Wang , Jiandong Shi
Inventor： Junichiro FUJITA , Reinald Gerhardt , Fang Wang , Jiandong Shi
IPC: H04J14/00
CPC classification number: H04Q11/0005 , H04J14/0204 , H04J14/021 , H04J14/0212 , H04J14/0217 , H04J14/0219 , H04Q2011/0009 , H04Q2011/0015 , H04Q2011/0016
Abstract: An optical switch system for dropping a ROADM node is presented. The switch system includes an N×M structure having two layers. A first layer includes optical splitters, each splitter receiving a multiplexed input signal and outputting a first multiplexed output signal. A second layer includes switches receiving the first multiplexed output signals from the optical splitters and generating a second multiplexed output signal. The second multiplexed output signal is typically one of the first multiplexed output signals. An optional third layer, which includes optical filters, receives the second multiplexed output signal from the switches and produces a non-multiplexed, single-wavelength output signal.
Abstract translation: 提出了一种用于丢弃ROADM节点的光交换机系统。 开关系统包括具有两层的N×M结构。 第一层包括光分路器，每个分路器接收复用的输入信号并输出第一复用输出信号。 第二层包括接收来自光分路器的第一复用输出信号并产生第二复用输出信号的开关。 第二复用输出信号通常是第一复用输出信号之一。 包括滤光器的可选的第三层从开关接收第二多路复用输出信号，并产生非复用的单波长输出信号。
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