公开(公告)号：US09654213B2

公开(公告)日：2017-05-16

申请号：US15069365

申请日：2016-03-14

Applicant: EXFO Inc.

Inventor： Bernard Ruchet ,  Normand Cyr

IPC: H04J14/00 ,  H04B10/079 ,  H04B3/46 ,  H04Q11/00

CPC classification number: H04B10/07955 ,  H04B3/46 ,  H04B10/079 ,  H04B10/0793 ,  H04B10/0795 ,  H04B10/07953 ,  H04Q11/0067 ,  H04Q2011/0083

Abstract: A portable apparatus for measuring optical powers of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the optical powers of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.

公开(公告)号：US09653878B2

公开(公告)日：2017-05-16

申请号：US14412611

申请日：2014-12-23

Applicant: SOURCE PHOTONICS (CHENGDU) CO., LTD.

Inventor： Chaobo Jia ,  Yuanjun Huang ,  Yuanzhong Xu

IPC: H01S3/00 ,  H01S3/13 ,  H04B10/07 ,  H01S3/09 ,  H04B10/079 ,  H04B10/40 ,  H04B10/50 ,  H01S5/0683 ,  H01S5/042

CPC classification number: H01S3/1305 ,  H01S3/09 ,  H01S5/042 ,  H01S5/0683 ,  H04B10/07 ,  H04B10/07955 ,  H04B10/40 ,  H04B10/503

Abstract: A dual-rate power point compensating circuit, comprising a microprocessor and a transmitter optical subsystem assembly (TOSA), wherein the TOSA includes a laser connected to a laser driver, a monitor photodiode (MPD) connected to the laser driver, and a current divider connected to the microprocessor and the MPD. When a feedback current from the MPD exceeds the adjustable and/or operating range of the laser driver, the feedback current is reduced so that it is kept in the adjustable and/or operating range of the laser driver. The laser driver determines the optical output power of the laser from the value of the reduced feedback current. The circuit and method extend the adjustable and/or operating range of a laser driver and enable it to regulate a target optical output power of the laser with a broad testing range and high accuracy when the feedback current is relatively high.

公开(公告)号：US09647773B2

公开(公告)日：2017-05-09

申请号：US15338379

申请日：2016-10-29

Applicant: Alexander Soto ,  Walter Soto

Inventor： Alexander Soto ,  Walter Soto

IPC: H04B10/00 ,  H04B10/80 ,  H04B10/25 ,  H04B10/27 ,  H04B10/2575 ,  H04N21/643 ,  H04B10/079

CPC classification number: H04B10/808 ,  H04B10/07955 ,  H04B10/1123 ,  H04B10/116 ,  H04B10/25 ,  H04B10/25751 ,  H04B10/27 ,  H04M19/08 ,  H04N21/64322

Abstract: A system for powering a network element of a fiber optic wide area network is disclosed. When communication data is transferred between a central office (CO) and a subscriber terminal using a network element to convert optical to electrical (O-E) and electrical to optical (E-O) signals between a fiber from the central office and twisted wire pair, coaxial cable or Ethernet cable transmission lines from the subscriber terminal, techniques related to local powering of a network element or drop site by the subscriber terminal or subscriber premise remote powering device are provided. Certain advantages and/or benefits are achieved using the present invention, such as freedom from any requirement for additional meter installations or meter connection charges and does not require a separate power network.

公开(公告)号：US09638874B2

公开(公告)日：2017-05-02

申请号：US14885000

申请日：2015-10-16

Applicant: Samtec, Inc.

Inventor： Joshua R. Cornelius ,  Eric Jean Zbinden ,  William J. Kozlovsky ,  David A. Langsam

IPC: G01N21/00 ,  G02B6/42 ,  G02B6/43

CPC classification number: H04B10/07955 ,  G01M11/3145 ,  G01M11/335 ,  G02B6/4225 ,  G02B6/4246 ,  G02B6/4249 ,  G02B6/4269 ,  G02B6/428 ,  G02B6/4286 ,  G02B6/4295 ,  G02B6/43 ,  H04B10/672

Abstract: A method for determining receiver coupling efficiency includes varying optical power inputted into a half active optical cable to determine a maximum optical power at which the TIA squelches and determining a receiver coupling efficiency by calculating a ratio of a threshold optical power to the maximum optical power at which the TIA squelches. A method of determining link loss in a channel includes varying optical power of a light source to determine the maximum optical power at which the TIA squelches and determining the link loss in the channel by subtracting the maximum optical power from the threshold optical power. A method of determining link topology includes selecting a pattern of optical powers and matching a pattern of squelched and non-squelched outputs with the pattern of optical power. An active optical cable includes memory storing a value related to an initial link loss of the active optical cable.

公开(公告)号：US09614638B2

公开(公告)日：2017-04-04

申请号：US14790967

申请日：2015-07-02

Applicant: Fujitsu Limited

Inventor： Inwoong Kim ,  Olga Vassilieva ,  Paparao Palacharla ,  Motoyoshi Sekiya

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04J14/0221 ,  H04B10/07955 ,  H04B10/07957

Abstract: Methods and systems for periodic optical filtering to identify tone modulated optical signals may enable relatively rapid scanning of an optical signal to identify individual optical channels. The optical signal having tone modulated optical channels may be scanned over a free spectral range of a periodic optical filter, such as a comb filter, to generate a filtered signal. Then, center optical frequencies for each of the optical channels in the filtered signal may be determined by demodulation and digital signal processing.

公开(公告)号：US20170070285A1

公开(公告)日：2017-03-09

申请号：US14849261

申请日：2015-09-09

Applicant: Fujitsu Limited

Inventor： Christopher Mesibov ,  Noah Gottfried ,  Idan Mandelbaum

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04B10/07955 ,  H04B10/0797 ,  H04B10/69 ,  H04J14/021 ,  H04J14/0221

Abstract: Methods and systems for replicating current outputs from a photodetector include using a transimpedance (TIA) amplifier to directly generate a TIA output voltage that is linear with optical power at the photodetector. Additionally, a first logarithmic amplifier is used to generate a first output voltage from the photodetector current and a second logarithmic amplifier is used to generate a second voltage from a copy of the photodetector current. The first voltage and the second voltage may be linear in some cases with the optical power in decibels.

Abstract translation: 用于从光电检测器复制电流输出的方法和系统包括使用跨阻抗（TIA）放大器直接产生与光电检测器处的​​光功率成线性的TIA输出电压。 此外，第一对数放大器用于从光电检测器电流产生第一输出电压，并且第二对数放大器用于从光电检测器电流的副本产生第二电压。 在一些情况下，第一电压和第二电压可以是线性的，光功率以分贝为单位。

公开(公告)号：US09577752B1

公开(公告)日：2017-02-21

申请号：US15155285

申请日：2016-05-16

Applicant: Google Inc.

Inventor： Yut Loy Chan

IPC: H04B10/08 ,  H04B10/079 ,  H04B10/2575

CPC classification number: H04B10/07955 ,  H04B10/2575 ,  H04B10/808

Abstract: Systems and apparatus for a wirelessly-powered passive optical power meter device. In one aspect, an optical power meter device comprises a power circuit connected to one or more antennas, the circuit including an RF to DC converter that generates a DC power signal that provides a DC power source for the optical power meter from an RF signal received by the one or more antennas, a photodetector that generates a power measurement signal that measures the power of the optical input signal, and a communication circuit that is connected to the one or more antennas, the photodetector, and the power circuit that when powered by the DC power source generates a modulation signal that is responsive to the power measurement signal and that causes the one of the one or more antennas to convey the power measurement signal to a reader device that is transmitting the RF signal.

Abstract translation: 用于无线供电的无源光功率计装置的系统和装置。 一方面，一种光功率计装置包括连接到一个或多个天线的电源电路，该电路包括RF至DC转换器，该RF至DC转换器产生从所接收的RF信号为光功率计提供直流电源的直流电源信号 通过所述一个或多个天线，产生测量所述光输入信号的功率的功率测量信号的光电检测器，以及连接到所述一个或多个天线的通信电路，所述光电检测器和所述电源电路， DC电源产生响应于功率测量信号的调制信号，并且使得一个或多个天线中的一个天线将功率测量信号传送到正在发送RF信号的读取器设备。

公开(公告)号：US09577687B2

公开(公告)日：2017-02-21

申请号：US15138345

申请日：2016-04-26

Applicant: L-3 Communications Corporation

Inventor： Elias Bonaventure Kpodzo ,  Robert Holland ,  Yanhua Deng ,  Paul Dourbal

IPC: H04B1/00 ,  H04B1/10 ,  H04K3/00 ,  H04B10/00 ,  H04B17/318 ,  H04B17/336 ,  H04L12/26

CPC classification number: H04B1/1027 ,  H04B1/10 ,  H04B1/109 ,  H04B10/00 ,  H04B10/07955 ,  H04B10/2507 ,  H04B10/2575 ,  H04B17/318 ,  H04B17/336 ,  H04B2210/006 ,  H04K3/20 ,  H04K3/228 ,  H04L43/16

Abstract: An interference cancellation system (ICS) may be used with a communication system to prevent or minimize interference from one or more sources. The ICS may receive radio RF signals comprised of one or more signals of interest (SOI) and multiple interfering signals. The ICS may use a sample of the interfering signals to cancel the interfering signals from the SOI. The multiple interfering signals may be converted into a single optical signal for cancellation. One or more optical cancellation paths may be used for interference cancellation. Each optical cancellation path may include an optical attenuator and/or an optical delay to achieve phase shifts and/or delays for interference cancellation.

Abstract translation: 干扰消除系统（ICS）可以与通信系统一起使用，以防止或最小化来自一个或多个源的干扰。 ICS可以接收由一个或多个感兴趣信号（SOI）和多个干扰信号组成的射频信号。 ICS可以使用干扰信号的样本来消除来自SOI的干扰信号。 多个干扰信号可以被转换成单个光信号用于消除。 一个或多个光消除路径可用于干扰消除。 每个光消除路径可以包括光衰减器和/或光延迟以实现用于干扰消除的相移和/或延迟。

公开(公告)号：US20170033862A1

公开(公告)日：2017-02-02

申请号：US15034638

申请日：2014-11-27

Applicant: ALCATEL LUCENT

Inventor： Nicolas DUPUIS ,  Stijn MEERSMAN

IPC: H04B10/03 ,  H04B10/079

CPC classification number: H04B10/03 ,  H04B10/0791 ,  H04B10/07955 ,  H04Q11/0067 ,  H04Q2011/0083

Abstract: The device includes a first detector configured to detect, from received signal power, first fault parameters related to an occurrence of a first fault on this optical fibre. The device further includes a database configured to store the first fault parameters and a second detector configured to detect from the received signal power second fault parameters related to a restoration of a second fault on the optical fibre. The device further includes a comparator configured to compare the second fault parameters with the stored fault parameters and to decide that the fault is resolved if the first fault parameters most closely match the second fault parameters.

Abstract translation: 该装置包括第一检测器，其被配置为从接收信号功率检测与该光纤上的第一故障的发生相关的第一故障参数。 所述设备还包括被配置为存储所述第一故障参数的数据库和被配置为从所述接收信号功率检测与所述光纤上的第二故障的恢复相关的第二故障参数的第二检测器。 所述设备还包括比较器，其被配置为将所述第二故障参数与所存储的故障参数进行比较，并且如果所述第一故障参数最接近于所述第二故障参数，则确定故障被解决。

公开(公告)号：US20170026126A1

公开(公告)日：2017-01-26

申请号：US15217553

申请日：2016-07-22

Applicant: L-3 Communications Corporation

Inventor： Elias Bonaventure Kpodzo ,  Robert Holland ,  Yanhua Deng ,  Paul Prucnal ,  Andrew McCandless ,  Paul Dourbal

IPC: H04B10/2507 ,  H04L12/26 ,  H04B10/079 ,  H04B17/336 ,  H04B10/2575 ,  H04B1/10 ,  H04B17/318

CPC classification number: H04B1/1027 ,  H04B1/10 ,  H04B1/109 ,  H04B10/00 ,  H04B10/07955 ,  H04B10/2507 ,  H04B10/2575 ,  H04B17/318 ,  H04B17/336 ,  H04B2210/006 ,  H04K3/20 ,  H04K3/228 ,  H04L43/16

Abstract: Systems and methods for cancelling interference from a received signal in order to properly detect a signal of interest are disclosed. A combined signal of interest plus interference signal may be received. A copy or sample of the interference signal may be determined. The interference signal and the combined signal of interest plus interference signal may be converted to the optical domain. The interference signal may be optically phase shifted by −180 degrees, which may result in an optically inverted interference signal. The optically inverted interference signal may be variably optically attenuated and/or variably optically time delayed, for example based on a detected output power of an optical subsystem of the interference cancellation system. As a result, interference cancellation of the interference signal from the combined signal of interest plus interference signal may be achieved, resulting in 50 dB or more of cancellation of the interference signal.

Abstract translation: 公开了用于消除来自接收信号的干扰以便适当地检测感兴趣的信号的系统和方法。 可以接收感兴趣的组合信号和干扰信号。 可以确定干扰信号的拷贝或采样。 干扰信号和感兴趣的组合信号加上干扰信号可以转换成光域。 干涉信号可以光学相移-180度，这可能导致光学反相干扰信号。 光学反相干涉信号可以例如基于干扰消除系统的光学子系统的检测到的输出功率而被可变地光衰减和/或可变地光时延。 结果，可以实现来自感兴趣的组合信号和干扰信号的干扰信号的干扰消除，导致干扰信号的消除的50dB或更多。