公开(公告)号：US20240283531A1

公开(公告)日：2024-08-22

申请号：US18416224

申请日：2024-01-18

申请人： EXFO INC.

发明人： Gang HE

IPC分类号： H04B10/073 ,  H04B10/293

CPC分类号： H04B10/0731 ,  H04B10/293

摘要： Methods and systems are disclosed for characterizing a polarization-dependent loss or gain (PDL/G) of an optical device under test (DUT), such as an optical fiber link, from an optical signal having passed through the optical DUT. The optical signal is substantially unpolarized upon entering the optical DUT. The method can include varying a state of polarization (SOP) of the optical signal over a plurality of sampled SOP conditions to produce a respective plurality of SOP-varied optical signals; performing a polarization-analysis and detection operation on the plurality of SOP-varied optical signals to acquire a respective plurality of detected signal sets, each detected signal set including at least one polarization-analyzed detected signal; and determining, as the PDL/G of the optical DUT, a polarization extinction ratio parameter representative of a ratio of maximum to minimum power levels measured among the polarization-analyzed detected signals of the plurality of detected signal sets.

公开(公告)号：US09923632B2

公开(公告)日：2018-03-20

申请号：US15410237

申请日：2017-01-19

申请人： FUJITSU LIMITED

发明人： Tomohiro Yamauchi ,  Shoichiro Oda

IPC分类号： H04B10/00 ,  H04B10/079 ,  H04J14/02 ,  H04B10/50 ,  H04B10/564

CPC分类号： H04B10/07957 ,  H04B10/0793 ,  H04B10/07955 ,  H04B10/0797 ,  H04B10/293 ,  H04B10/506 ,  H04B10/564 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0256 ,  H04J14/0257

摘要： An optical transmission apparatus includes a variable attenuator configured to adjust output intensity of each wavelength signal included in a multiplexed optical signal having been input; a monitor configured to measure an output spectrum of the variable attenuator; a calculation unit configured to calculate an amount of spectral narrowing and an amount of spectral surplus, based on a measured value by the monitor, and a target value set in advance; and a control unit configured to control an amount of attenuation of the variable attenuator, based on the amount of spectral narrowing and the amount of spectral surplus.

公开(公告)号：US09882671B2

公开(公告)日：2018-01-30

申请号：US14915626

申请日：2014-09-11

申请人： NEC CORPORATION

发明人： Tatsuhiro Nakada

IPC分类号： H04J14/00 ,  H04B10/00 ,  H04J14/02 ,  H04B10/038 ,  H04B10/66 ,  H04B10/29 ,  H04B10/293

CPC分类号： H04J14/0258 ,  H04B10/038 ,  H04B10/29 ,  H04B10/293 ,  H04B10/66 ,  H04J14/0201 ,  H04J14/021 ,  H04J14/0221

摘要： An optical signal transmitted by another terminal device that was used for compensation could be received by a device that is not the intended destination of said optical signal, resulting in the problem that confidentiality cannot be guaranteed for the information in said optical signal. This optical reception device is characterized by the provision of the following: a receiving means via which wavelength-multiplexed signal light is inputted; and a transmitting means that, in accordance with an identifier in an optical signal of a prescribed wavelength in the inputted wavelength-multiplexed signal light, forwards said optical signal.

公开(公告)号：US09736790B1

公开(公告)日：2017-08-15

申请号：US15090056

申请日：2016-04-04

申请人： Spreadtrum Communications USA Inc.

发明人： David Haub ,  Lon Christensen ,  Zebin Wang

IPC分类号： H04B7/00 ,  H04W52/24 ,  H04B1/40 ,  H04B10/293 ,  H04W52/00

CPC分类号： H04W52/245 ,  H04B1/40 ,  H04B10/293 ,  H04B10/2931 ,  H04B17/0085 ,  H04B17/14 ,  H04B17/318 ,  H04W52/00

摘要： A self-calibrating transceiver includes a transmitter chain, a receiver chain, a base band processor, and a calibration control state machine. The state machine is in electrical communication with the transmitter chain, the receiver chain, and the base band processor, and is configured for enabling the receiver chain and setting the receiver chain and the transmitter chain to corresponding frequencies. The state machine stores one or more transmitter power and power amplifier gain mode settings, and for each setting, sets the transmitter gain and power amplifier gain mode. The transmitter chain transmits a signal, the receiver chain receives the transmitted signal, and the baseband processor measures a received signal strength indicator (RSSI) of the received signal. The state machine further adjusts the transmitter output power based on the measured RSSI.

公开(公告)号：US09030730B2

公开(公告)日：2015-05-12

申请号：US13741177

申请日：2013-01-14

申请人： Fujitsu Limited

发明人： Jeng-Yuan Yang ,  Motoyoshi Sekiya ,  Yoichi Akasaka

IPC分类号： G02F1/35 ,  G02F1/39 ,  H04B10/50

CPC分类号： H04J14/0221 ,  G02F1/3536 ,  G02F1/39 ,  G02F2203/07 ,  H04B10/293 ,  H04B10/50 ,  H04B10/532 ,  H04B10/564 ,  H04Q11/0005 ,  H04Q2011/0016

摘要： A method for amplifying optical signals includes determining a source optical signal, generating a first resultant signal including a pump signal and the source optical signal, sending the first resultant signal through a non-linear element to generate a second resultant signal including the first resultant signal and an idler signal, and sending the second resultant signal through a non-linear element to perform phase-sensitive amplification. The phase-sensitive amplification results in a third resultant signal including an amplified source optical signal, the pump signal, and the idler signal. The method also includes filtering the third resultant signal to remove the pump signal and the idler signal and outputting the amplified source optical signal.

摘要翻译： 一种用于放大光信号的方法包括确定源光信号，产生包括泵浦信号和源光信号的第一合成信号，通过非线性元件发送第一合成信号，以产生包括第一合成信号的第二合成信号 和惰轮信号，并且通过非线性元件发送第二结果信号以执行相位敏感放大。 相位敏感放大导致包括放大的源光信号，泵浦信号和惰轮信号的第三结果信号。 该方法还包括对第三结果信号进行滤波以去除泵浦信号和空载信号并输出​​放大的源光信号。

公开(公告)号：US20140177037A1

公开(公告)日：2014-06-26

申请号：US13724610

申请日：2012-12-21

申请人： Balakrishnan SRIDHAR ,  Jun BAO

发明人： Balakrishnan SRIDHAR ,  Jun BAO

IPC分类号： H01S3/10

CPC分类号： H01S3/06758 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/094084 ,  H01S3/1003 ,  H01S3/1608 ,  H01S2301/02 ,  H04B10/291 ,  H04B10/2916 ,  H04B10/293 ,  H04B2210/003

摘要： An extended dynamic range optical amplifier, a method of operation, and a line amplifier configuration include an optical amplifier that can be optimized for high or low span loss conditions by switching an internal stage in or out of an internal light path within the amplifier. The extended dynamic range optical amplifier can include a low gain mode and a high gain mode with an internal switch to switch out a gain mid-stage in a low gain mode to extend the useful dynamic range of the amplifier. Further, the extended dynamic range optical amplifier can use residual pump power from an initial stage to pump the gain mid-stage in the high gain mode. Additionally, the extended dynamic range optical amplifier includes remapping of gain in the initial stage and the gain mid-stage to optimize the amplifier noise performance based on the maximum output power of the amplifier.

摘要翻译： 扩展动态范围光放大器，操作方法和线路放大器配置包括光放大器，其可以通过将放大器内部的光路中的内部级切换到内部级而对于高或低跨度损耗条件进行优化。 扩展动态范围光放大器可以包括低增益模式和高增益模式，内部开关可在低增益模式下切换增益中级，以扩展放大器的有用动态范围。 此外，扩展动态范围光放大器可以使用来自初级的剩余泵浦功率来在高增益模式下泵浦增益中间级。 此外，扩展动态范围光放大器包括在初始阶段和增益中期阶段的增益重新映射，以根据放大器的最大输出功率优化放大器噪声性能。

公开(公告)号：US08705167B2

公开(公告)日：2014-04-22

申请号：US12868205

申请日：2010-08-25

申请人： Youichi Akasaka

发明人： Youichi Akasaka

IPC分类号： H01S3/13 ,  H04B10/293 ,  H01S3/10

CPC分类号： H01S3/1308 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S5/06821 ,  H01S5/5009 ,  H04B10/2507 ,  H04B10/293

摘要： In accordance with one embodiment of the present disclosure a system for compensating for polarization dependent loss experienced by an optical signal comprises an optical amplifier configured to amplify an optical signal and having a polarization dependent gain (PDG). The system also comprises a polarization rotator coupled to the amplifier and configured to rotate the polarization of the optical signal before the signal enters the amplifier. The system also comprises a polarization dependent loss (PDL) controller coupled to the amplifier and the rotator. The PDL controller may be configured to determine a post-amplifier PDL of the optical signal as the signal leaves the optical amplifier. The PDL controller may also be configured to control the rotator to rotate the polarization of the optical signal based on the post-amplifier PDL, such that the PDG of the amplifier compensates for the PDL experienced by the optical signal.

摘要翻译： 根据本公开的一个实施例，用于补偿由光信号经历的偏振相关损耗的系统包括配置成放大光信号并具有偏振相关增益（PDG）的光放大器。 该系统还包括耦合到放大器并被配置为在信号进入放大器之前旋转光信号的偏振的偏振旋转器。 该系统还包括耦合到放大器和旋转器的偏振相关损耗（PDL）控制器。 PDL控制器可以被配置为当信号离开光放大器时确定光信号的后置放大器PDL。 PDL控制器还可以被配置为控制旋转器以基于后置放大器PDL旋转光信号的偏振，使得放大器的PDG补偿由光信号经历的PDL。

公开(公告)号：US20240348338A1

公开(公告)日：2024-10-17

申请号：US18683328

申请日：2021-08-27

申请人： NEC Corporation

发明人： Ryota Abe

IPC分类号： H04B10/293 ,  H04J14/02

CPC分类号： H04B10/293 ,  H04J14/0307

摘要： The light multiplexing/demultiplexing device comprises: a first demultiplexer that demultiplexes an inputted first wavelength-multiplexed signal light into a first signal light of a first wavelength band and a second signal light of a second wavelength band and outputs the first and the second signal light; a first amplifier that amplifies the second signal light from the first demultiplexer; a light processor that, based on the inputted second signal light and an inputted third signal light of the second wavelength band, outputs a fourth signal light; and a first multiplexer that multiplexes the fourth signal light with the first signal light from the first demultiplexer, further, the gain of the first amplifier is set such that the difference between power of the first signal light outputted from the first multiplexer and power of the fourth signal light outputted from the first multiplexer is equal to or less than a predetermined value.

公开(公告)号：US11955764B2

公开(公告)日：2024-04-09

申请号：US16980478

申请日：2018-08-27

申请人： HUAWEI MARINE NETWORKS CO., LTD.

发明人： Changwu Xu ,  Yuhe Li ,  Ge Jin ,  Yan Wang ,  Liping Ma

IPC分类号： H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H04B10/291 ,  H04B10/293

CPC分类号： H01S3/06754 ,  H01S3/06716 ,  H01S3/06737 ,  H01S3/094053 ,  H01S3/094061 ,  H01S3/09408 ,  H04B10/2912 ,  H04B10/293

摘要： Disclosed is a submarine network device, comprising a fiber set, a pump laser set, an erbium doped fiber amplifier (EDFA) set, a primary fiber coupler (CPL) set and a secondary CPL set, wherein the primary CPL set comprises N primary CPLs, the secondary CPL set comprises N secondary CPLs, with N being an integer greater than or equal to 3. The fiber set is configured to connect the pump laser set, the primary CPL set, the secondary CPL set and the EDFA set. An input port of each primary CPL in the primary CPL set is at least connected with a pump laser. An output port of each secondary CPL in the secondary CPL set is at least connected with an EDFA. Output ports of each primary CPL in the primary CPL set are respectively connected with two different secondary CPLs that are spaced by a secondary CPL, and input ports of each secondary CPL in the secondary CPL set are respectively connected with two different primary CPLs that are spaced by a primary CPL.

公开(公告)号：US11923893B2

公开(公告)日：2024-03-05

申请号：US17379201

申请日：2021-07-19

申请人： AT&T Intellectual Property I, L.P.

发明人： Ricky Perry

IPC分类号： H04B10/071 ,  H04B10/293 ,  H04B10/61

CPC分类号： H04B10/071 ,  H04B10/293 ,  H04B10/614

摘要： Aspects of the subject disclosure may include, for example, a device having an input port and multiple output ports adapted for connection to multiple passive optical network (PON) segments. The device includes an optical power splitting device in communication between the input port and the multiple output ports and adapted to provide divided portions of an optical signal received at the input port to the PON segments via the output ports. The device includes optical delay devices in optical communication between the optical power splitting device and at least a portion of the multiple output ports. The optical delay devices provide distinguishable delay values, that delay the divided portions of the optical signal, the distinguishable delay values facilitating associations of the PON segments to the output ports based on optical time domain reflectometry (OTDR) measurements obtained via the input port. Other embodiments are disclosed.