| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | POWER MANAGEMENT IMPLEMENTATION IN AN OPTCIAL LINK | US12974654 | 2010-12-21 | US20120155867A1 | 2012-06-21 | Klaus D. Giessler; Christine M. Krause |
| An optical link power management scheme takes the best advantage of a dynamic connection environment, where ports may be connected and disconnected at any time, and where data flows may start and stop as needed by the applications using the high speed data links. Power consumption is optimized, eye safety standards are met, and robust connection detection is preserved. | ||||||
| 122 | OPTICAL COMMUNICATION APPARATUS AND OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION SYSTEM | US12829153 | 2010-07-01 | US20110008051A1 | 2011-01-13 | Yousuke MIYAJI |
| In case of a disconnection failure of an optical transmission line, a Raman amplifier generates a loss of main and supervisory signal alarms, an optical amplifier generates a loss of main signal alarm, and a supervisory signal transmission and reception unit detects the loss of supervisory signal. On the other hand, in case of a failure generated in an optical fiber, the supervisory signal transmission and reception unit performs APR control. Thus the optical amplifier stops outputting the main signal and continues to output the supervisory signal. The Raman amplifier generates the loss of main signal alarm, and the supervisory signal transmission and reception unit detects the loss of supervisory signal. The monitoring unit identifies failure point according to a combination of an existence of the loss of signal alarm by the Raman and optical amplifiers and the loss of supervisor signal by the supervisory signal transmission and reception unit. | ||||||
| 123 | Method of controlling optical amplifier located along an optical link | US11722788 | 2005-12-20 | US07864389B2 | 2011-01-04 | Tal Muzicant |
| The invention concerns shutting down and restarting optical amplifiers, such as Raman amplifiers, in an optical link, depending whether the optical amplifier is a transmitting side amplifier or a receiving side amplifier. For controlling the amplifiers, at least one diagnostic signal is to be transmitted via an auxiliary optical channel in the optical link, and a number of physical events simultaneously taking place are to be taken into account to conclude whether to shut down or to restart one of the optical amplifiers. | ||||||
| 124 | Method and apparatus for automatic shut-down and start-up of optical amplifiers in optical networks | US11538869 | 2006-10-05 | US07773884B2 | 2010-08-10 | Uri Ghera; David Menashe |
| A method and apparatus for automatic shut-down and start-up of optical amplifiers in wavelength division multiplexed (WDM) optical networks include use of an optical channel monitor (OCM) to monitor loss and return of an input signal. By using the OCM to separately monitor the power level of each individual channel, it is possible to detect loss of all channels or return of a single channel even in the presence of ASE at the amplifier input. The OCM receives a fraction of the input power to the amplifier via an optical tap at the amplifier input, and provides an electrical output to a control unit corresponding to the optical power level of each individual WDM channel. Based on this electrical output, the control sends a shut-down or start-up signal to the pump unit within the amplifier. | ||||||
| 125 | Optical Safety Implementation in Protection Switching Modules | US12267894 | 2008-11-10 | US20100119223A1 | 2010-05-13 | Cinzia Ferrari; Alberto Tanzi |
| Optical safety functions are incorporated into protection switching modules which maintain redundant pathways to avoid interruptions in optical network connections. The optical safety functions which lower optical power levels upon interruptions of optical connections are effectively combined with protection switching procedures which are also triggered by interruptions in optical network connections. The interoperation of protection and safety processes keep optical power levels below hazardous levels at system points which might be accessible to human operators. | ||||||
| 126 | Fiber-optic long-haul transmission system | US12215363 | 2008-06-26 | US20090324233A1 | 2009-12-31 | Igor Samartsev; Vladimir Antonenko |
| An ultra-long fiber-optic transmission system is configured in accordance with the current telecom standards and particularly advantageous for transmission data at a long distance which may exceed 400 km between adjacent nodes. The disclosed system has at least one intermediary amplifying node provided with a supervisory optical channel (SOC) which comprises a transponder operative to select the direction in which a supervisory channel signal (SCS), carrying information about the fiber break and malfunction of WDM channels, is transmitted along the SOC. The transponder further includes a receiver operative to measure the power of incoming and a Raman controller coupled to the receiver and to either turn or turn off a pump of Raman amplifier based on determination of whether the measured power of the SCS is lower than or at least equal to a reference value. The transponder is further configured with a transmitter configured as a fiber laser which operates in at least two modes. In the first mode when the measured power as at least equal to the reference value, the fiber laser emits the having a nominal power. In the second mode, when the measured power of the is less than the reference value, the transmitter is operative to lase the having a greater than nominal power even if Raman and EDFA amplifiers of the amplification node are disabled. The utilization of the fiber laser enhances the reliability and control of the long fiber-haul system's operation. | ||||||
| 127 | Optical transmission system | US11808754 | 2007-06-12 | US07586672B2 | 2009-09-08 | Eiji Ishikawa; Hiroto Ikeda; Hiroyuki Deguchi |
| A reliable optical transmission system with an improved signal control mechanism that avoids abrupt power variations of light beams, thereby preventing optical supervisory channel (OSC) signals from experiencing errors. An optical amplifier amplifies main signals under the control of an optical amplifier controller, which spends a first predetermined time to raise the output power of the optical amplifier up to a desired level. A pump light source produces a pump beam for injection to a fiber-optic transmission line so as to make it serve as an amplifying medium. The pump light source is controlled by a pump light source controller that spends a second predetermined time to raise the pump beam to a desired power level. This stepwise start-up process of the amplifier power and pump beam power prevents OSC signals from experiencing abrupt power variations. | ||||||
| 128 | LIGHT TRANSMISSION DEVICE AND METHOD OF SETTING LIGHT INPUT BREAK DETECTION THRESHOLD VALUE | US12275473 | 2008-11-21 | US20090129770A1 | 2009-05-21 | Masahiro OOHASHI; Yuichiro Sakane; Yuji Shimada; Hiromu Yoshii |
| According to an aspect of an embodiment, in a light transmission device for switching a light transmission path for receiving an optical signal from a currently used system to a backup system when the light level of light input from a light transmission path of a currently used system becomes substantially equal to or less than a light input break detection threshold value which serves as a reference for detecting a light input break. The light transmission device includes light level measuring means for measuring the light level of the light input from the light transmission path of the currently used system, and light input break detection threshold value setting means for detecting only the light level of accumulated noise of the light level measured by the light level measuring means and setting the detected light level as the light input break detection threshold value. | ||||||
| 129 | Optical output control method for use in optical transmission node and optical output control apparatus for use in the same | US10861568 | 2004-06-07 | US07519300B2 | 2009-04-14 | Toshihiro Ohtani; Masaki Sato |
| In an optical transmission node network in which a first optical transmission node is connected with a second optical transmission nodes through an optical fiber cable and automatic optical output (APSD: Automatic Power Shut-Down) control is activated, after the APSD control is brought into an inhibited status, if an optical conduction to the second optical transmission node is detected, the APSD control inhibited status is canceled. In this way, if an optical transmission fiber is resorted (reconnected) after optical output power measurement or the like is carried out, the APSD control inhibition status (invalid status) is canceled for automatically restoring the APSD control activated status. Thus, optical output can be prevented from being inadvertently emitted at a high energy level from the optical fiber cable. | ||||||
| 130 | Automatic power restoring method and optical communication system | US12081780 | 2008-04-21 | US20080317461A1 | 2008-12-25 | Hiroyuki Deguchi; Shinichirou Harasawa; Hideki Maeda; Akira Naka; Gentaro Funatsu |
| The present invention provides an automatic power restoring method capable of reliably detecting continuity by the dissolution of a line fault, to restore the optical power, even in a structure including an optical amplification medium on an optical transmission path and an optical communication system using the method. To this end, in an optical communication system to which the automatic power restoring method of the invention is applied, a pilot signal having a low transmission rate, a wavelength of which is set based on loss wavelength characteristics obtained by combining loss wavelength characteristics of an optical fiber used for the optical transmission path and loss wavelength characteristics of the optical amplification medium on the optical transmission path, is transmitted and received between an optical transmitting station and an optical receiving station when a line fault occurs, and a detection of continuity is thus performed. According to the result of the continuity detection, the power state at the occurrence of line fault is automatically restored to the power state at a time of normal operation. | ||||||
| 131 | EYE SAFETY AND INTEROPERABILITY OF ACTIVE CABLE DEVICES | US12112214 | 2008-04-30 | US20080267620A1 | 2008-10-30 | Christopher R. Cole; Lewis B. Aronson; Darin James Douma |
| An integrated cable configured to communicate over much of its length using one or more optical fibers includes an electrical connector at least one end. The electrical connector at a first end of the integrated cable and an optoelectronic device coupled to or included in the other end of the integrated cable may utilize a bidirectional status link to transmit status data to each other. If the status data indicates that optical signals transmitted over the optical channels between the two devices are not potentially exposed to view, the two devices may operate above nominal eye safety limits. Otherwise, the two devices may operate at or below nominal eye safety limits. If the second optoelectronic device is not status-link enabled, the first optoelectronic device may operate at or below nominal eye safety limits. | ||||||
| 132 | Automatic power restoring method and optical communication system | US10793665 | 2004-03-05 | US07437069B2 | 2008-10-14 | Hiroyuki Deguchi; Shinichirou Harasawa; Hideki Maeda; Akira Naka; Gentaro Funatsu |
| The present invention provides an automatic power restoring method capable of reliably detecting continuity by the dissolution of a line fault, to restore the optical power, even in a structure including an optical amplification medium on an optical transmission path and an optical communication system using the method. To this end, in an optical communication system to which the automatic power restoring method of the invention is applied, a pilot signal having a low transmission rate, a wavelength of which is set based on loss wavelength characteristics obtained by combining loss wavelength characteristics of an optical fiber used for the optical transmission path and loss wavelength characteristics of the optical amplification medium on the optical transmission path, is transmitted and received between an optical transmitting station and an optical receiving station when a line fault occurs, and a detection of continuity is thus performed. According to the result of the continuity detection, the power state at the occurrence of line fault is automatically restored to the power state at a time of normal operation. | ||||||
| 133 | METHOD AND OPTICAL AMPLIFIER FOR LASER SAFETY PROTECTION AND METHOD FOR LOADING IDENTIFICATION SIGNAL | US11948648 | 2007-11-30 | US20080075459A1 | 2008-03-27 | Hao WANG; Yiquan LU; Congqi LI |
| A method for laser safety protection in an optical communication system includes: a downstream station detecting whether an identification signal loaded by an upstream station on a main optical channel in a direction from the upstream station to the downstream station, exist on the main optical channel; if the identification signal is not detected, the downstream station executing a scheduled safety protection procedure. Methods for loading an identification signal on a main optical channel in an optical communication system and an optical amplifier of laser safety protection, which implement loading the identification signal by controlling the change of pump light of optical amplifier or the wave motion of signal light of main optical channel, are also provided. The solution makes it possible to reliably detect a fiber failure when RAMAN amplifiers or remotely-pumped amplifiers exist, thereby implementing laser safety protection. | ||||||
| 134 | Optical transceiver and host adapter with memory mapped monitoring circuitry | US10831072 | 2004-04-22 | US07302186B2 | 2007-11-27 | Greta L. Light; Lewis B. Aronson; Lucy G. Hosking; Rudolf J. Hofmeister |
| A host adaptor is configured to monitor operation of an optoelectronic transceiver. The host adapter includes a transceiver interface, memory, comparison logic and a host interface. The transceiver interface receives from the optoelectronic transceiver digital values corresponding to operating conditions of the optoelectronic transceiver. The memory includes one or more memory arrays for storing information related to the optoelectronic transceiver, including the digital values received from the optoelectronic transceiver. The comparison logic is configured to compare the digital values with limit values to generate flag values, wherein the flag values are stored in predefined flag storage locations within the memory during operation of the optoelectronic transceiver. The host interface enables a host device to read from host specified locations within the memory, including the predefined flag storage locations, in accordance with commands received from the host device. | ||||||
| 135 | Method for Detecting a Check-Back Signal in an Optical Transmission System | US10510973 | 2003-04-01 | US20070269208A1 | 2007-11-22 | Guido Gentner; Rene Neumann; Gerhard Thanhauser |
| The invention relates to a method for detecting a check-back signal in a transmission system for optical signals. According to said method, a constant proportion of the output in a defined frequency range of the check-back signal is concentrated in a narrow-band spectral range and is determined after a transmission phase by means of a narrow-band detection of the concentrated energy around the spectral range. If no signal is identified during the narrow-band detection, a line interruption is determined and no pump source is switched on for safety reasons. The narrow-band detection of the check-back signal also allows the transmission attenuation of the transmission system to be measured. | ||||||
| 136 | Method and apparatus for detecting a fault on an optical fiber | US11314678 | 2005-12-21 | US20070140688A1 | 2007-06-21 | Jagdish Patel; Keshav Kamble; Gregory Foster |
| The mode of operation in which a port is configured to operate may be selected so that the manner in which the port will interpret a loss of signal on a receive fiber may be specified. In an immediate mode, the port will interpret a loss of signal on a receive fiber as an indication of a fault on the transmit fiber (or interfaces associated with the transmit fiber) and will immediately shut its transmit interface down. In a multiple cycle detection mode, the port will not immediately interpret a loss of signal on a receive fiber as an indication of a fault on the transmit fiber, but rather will begin monitoring the receive fiber to look for a specified loss of signal pattern on the receive fiber. In this mode the port will interpret a repetitive loss of signal on the receive fiber as an indication of a fault on the transmit fiber. By providing a mode selector, the manner in which the ports are configured to operate may be adjusted individually, as a group, or globally. | ||||||
| 137 | System and method for protecting eye safety during operation of a fiber optic transceiver | US10657554 | 2003-09-04 | US07184668B2 | 2007-02-27 | Lewis B. Aronson; Stephen G. Hosking |
| A single-chip integrated circuit, sometimes called a controller, controls operation of a transceiver having a laser transmitter and a photodiode receiver. The controller includes memory for storing information related to the transceiver, and analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, converting the received analog signals into digital values, and storing the digital values in predefined locations within the memory. Comparison logic compares one or more of these digital values with predetermined setpoints, generates flag values based on the comparisons, and stores the flag values in predefined locations within the memory. Control circuitry in the controller shuts off the laser transmitter in response to comparisons of signals with predetermined setpoints that indicate potential eye safety hazards. | ||||||
| 138 | System and method for protecting eye safety during operation of a fiber optic transceiver | US11077280 | 2005-03-09 | US07162160B2 | 2007-01-09 | Lewis B. Aronson; Lucy G. Hosking |
| A single-chip integrated circuit, sometimes called a controller, controls operation of a transceiver having a laser transmitter and a photodiode receiver. The controller includes memory for storing information related to the transceiver, and analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, converting the received analog signals into digital values, and storing the digital values in predefined locations within the memory. Comparison logic compares one or more of these digital values with predetermined setpoints, generates flag values based on the comparisons, and stores the flag values in predefined locations within the memory. Control circuitry in the controller shuts off the laser transmitter in response to comparisons of signals with predetermined setpoints that indicate potential eye safety hazards. | ||||||
| 139 | Method and system for improved eye protection safety of distributed raman amplifiers | US11464198 | 2006-08-13 | US20060274402A1 | 2006-12-07 | Uri Ghera; Daniel Berger; David Menashe |
| A system and method for providing eye-safety protection during operation of distributed Raman amplifiers based on the application of continuous out-of-band amplified spontaneous scattering (ASS) monitoring in an optical communication network span coupled to the Raman amplifier, and real-time detection and analysis of changes in the monitored ASS power level, The system includes at least one Raman pump for introducing Raman energy into the span, a monitoring unit for performing the continuous ASS monitoring, and a control unit operative to detect and analyze in real-time changes in the ASS power, and upon determination that such changes indicate an open span, to reduce the level of the Raman pump energy entering the span to a safe level. | ||||||
| 140 | Signal light interruption detecting method and optical amplifier using same | US10901985 | 2004-07-30 | US07132646B2 | 2006-11-07 | Yuji Tamura |
| In an optical amplifier of the present invention, a part of an input light output from a transmission path fiber is branched as a monitor light, a frequency component corresponding to a period at which a header area of a framed signal light appears, is extracted, and when a voltage level of a direct-current signal obtained by direct-current converting the frequency component becomes lower than a reference voltage, the input interruption of the signal light is detected, to perform a shut-down control of a pumping light source. Thus, an optical amplifier of low cost capable of suppressing an influence of a noise light while ensuring the immediacy, is provided. | ||||||
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