| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Integrated memory mapped controller circuit for fiber optics transceiver | US09777917 | 2001-02-05 | US07079775B2 | 2006-07-18 | Lewis B. Aronson; Stephen G. Hosking |
| A controller for controlling 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 limit values, generates flag values based on the comparisons, and stores the flag values in predefined locations within the memory. Control circuitry in the controller controls the operation of the laser transmitter in accordance with one or more values stored in the memory. A serial interface is provided to enable a host device to read from and write to locations within the memory. Excluding a small number of binary input and output signals, all control and monitoring functions of the transceiver are mapped to unique memory mapped locations within the controller. A plurality of the control functions and a plurality of the monitoring functions of the controller are exercised by a host computer by accessing corresponding memory mapped locations within the controller. | ||||||
| 142 | Method and system for improved eye protection safety of distributed Raman amplifiers | US11001055 | 2004-12-02 | US20060119931A1 | 2006-06-08 | Uri Ghera; Daniel Berger; Itzhak Filiba; 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. | ||||||
| 143 | Memory mapped monitoring circuitry for optoelectronic device | US10800177 | 2004-03-12 | US06941077B2 | 2005-09-06 | Lewis B. Aronson; Stephen G. Hosking |
| Circuitry for monitoring operation of an optoelectronic device having a laser transmitter and a photodiode receiver includes 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 memory-mapped locations within the optoelectronic device. Comparison logic compares one or more of these digital values with limit values, generates flag values based on the comparisons, and stores the flag values in predefined locations within the optoelectronic device. An interface enables a host device to read from and write to host-specified memory mapped locations within the optoelectronic device. | ||||||
| 144 | Optical level control method | US09791915 | 2001-02-26 | US06937820B2 | 2005-08-30 | Hiroyuki Iwaki; Tetsuo Wada |
| The present invention relates to an optical level control method for use in an optical transmission system. In the system, a WDM terminal comprises a multiplexing/demultiplexing unit, an amplifier, an up-direction OSC light transmitting/receiving unit, an up-direction multiplexer, an up-direction branching unit, an amplifier and an APR control unit, and a repeater comprises an up-direction branching unit, an OSC light transmitting/receiving unit, an amplifier, an up-direction multiplexer, a down-direction branching unit, an amplifier, a down-direction multiplexer and an APR control unit. In this configuration, a flexible optical output level control in connection with variation in WDM light level, a selective value irrespective of occurrence of an error stemming from the passage of time and avoidable malfunctions are respectively capable. In addition, a trouble retrieving operator can eliminate the possibility of being exposed to the WDM light. | ||||||
| 145 | Method and system for encoding optical communication information during automatic laser shutdown restart sequence | US10102790 | 2002-03-21 | US06922531B2 | 2005-07-26 | Paul A. Smeulders |
| A system and method for identifying one or more characteristics of an optical signal, in which a transmitter is operable to transmit an optical signal and a receiving unit is operable to receive the optical signal. The transmitter has a laser for generating the optical signal and an encoding unit adapted to control the laser to activate and deactivate the optical signal during a laser shutdown state based on a predetermined code. The receiving unit has an optical receiver optically coupled to the transmitter by a light transmission medium and is operable to receive the optical signal from the transmitter. The receiving unit also has a decoder measuring at least one of an active time of the optical signal and the inactive time between active times of the optical signal. The decoder determines at least one of the one or more characteristics of the optical system based on at least one of the active time or the inactive time. | ||||||
| 146 | Method for automatically provisioning a network element | US10093847 | 2002-03-08 | US06920288B2 | 2005-07-19 | Richard Adleman; Peter L. Bartman; Heribert J. Blach; Janet M. Greenberg; Mile Radovanovic; David A. Sadler; Mary Socratous; Scott D. Young |
| Embodiments of the invention generally provide a method for automatically detecting and provisioning new optical connections in a network element (NE). The detection of the optical connections is generally accomplished via optical scans, and in particular, an optical spectral analysis type scan, which may be conducted at specific times and at specific points within the NE in order to determine an association corresponding to a new connection through the NE. The automatic detecting in provisioning method of the invention may generally be implemented on connections in end terminals (ET), as well as connections in optical add/drop multiplexer (OADM) NEs. As such, embodiments of the invention allow for automatic detection and provisioning of optical circuit packs in an optical line system (OLS) based upon optical scans configured to detect the presence of valid incoming client signals through the NE. | ||||||
| 147 | Optical transmission system | US10958639 | 2004-10-06 | US20050105900A1 | 2005-05-19 | Takayuki Akimoto; Ryoji Noguchi; Kiichiro Shinokura |
| An optical transmission system which is capable of improving the stability of the system by appropriately adjusting a transmission data format and a transmitted optical output when a fault occurs on a transmission path, when a terminal is initiated, or when the transmission path is recovered from a fault. The optical transmission system comprises a first test signal supplying portion responsive to a detection of erroneous contents in a received signal received through the optical transmission path for supplying a test signal to the optical transmission path, a second test signal supplying portion responsive to a detection of a received signal received through the optical transmission path, which is equal to a test signal, and a communication stopping portion for stopping the transmission/reception of a signal through the optical transmission path when a frequency at which the erroneous contents are detected or a frequency at which the test signal is detected exceeds a predetermined threshold. | ||||||
| 148 | Optical communication system, optical communication apparatus, and optical cable | US10849657 | 2004-05-20 | US20050053340A1 | 2005-03-10 | Yoichi Toriumi; Nobuhiko Tsukahara |
| An optical communication apparatus is connected to the other communication apparatus by an optical fiber. The optical fiber cable comprises conducting wires. By interconnecting an output-side conducting circuit provided to the optical communication apparatus and an input-side conducting circuit provided to the other communication apparatus, a detection circuit is constituted. The optical communication apparatus comprises a monitor for monitoring a state of conduction of the detection circuit and an output control portion for controlling a laser diode. When the optical fiber cable is extracted from the optical communication apparatus, it is extracted from the other communication apparatus, and it is broken, the output-side and input-side conducting circuits are cut off. The monitor monitors a change in the state of conduction. If the monitor detects a change in the state of conduction, the output control portion stops emission of light from the laser diode. | ||||||
| 149 | Optical transceiver and host adapter with memory mapped monitoring circuitry | US10831072 | 2004-04-22 | US20050031352A1 | 2005-02-10 | Greta Light; Lewis Aronson; Lucy Hosking; Rudolf 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. | ||||||
| 150 | Apparatus and method for visualizing an automatic laser shutdown state in an optical transmission system | US09939559 | 2001-08-28 | US06839516B2 | 2005-01-04 | Byung Tak Lee; Jong Hoon Kim; Chang Bae Hyun |
| An apparatus and method are disclosed for visualizing an automatic laser shutdown (ALS) state. An operator is informed of the ALS state by transmitting a visible light with weak power, to an optical fiber, that effuses from the cut position of the optical fiber. The operator recognizes the cut position of the optical fiber by comparing the power of the ALS visible light reflected from the cut surface of the optical fiber and that of the transmitting ALS visible light, and thus restores the cut optical fiber at the recognized position. | ||||||
| 151 | Method and apparatus for automatically controlling optical signal power in optical transmission systems | US10092746 | 2002-03-07 | US20040208519A1 | 2004-10-21 | Robert D. Feldman; Janet M. Greenberg; Mile Radovanovic; S. R. Thangavelu; William A. Thompson |
| A method and apparatus for controlling the power level of an optical signal includes detecting the loss of a supervisory signal counter-propagating in an optical fiber. | ||||||
| 152 | Optical shutter | US10432563 | 2003-11-18 | US20040071392A1 | 2004-04-15 | Andrew G Lauder |
| The invention provides an optical shutter (400) for a communication system of a type comprising first (B1, B2) and second (A1, A2) communication paths along which information-bearing radiation propagates in opposite directions. The shutter (400) comprises: an optical tap (440) and a power monitor (430) for monitoring power of information-bearing radiation propagating along the first path (B1, B2) and for generating a corresponding radiation power indicative signal; a control unit (420) for comparing the indicative signal with a threshold value to generate a control signal (control); and shutter switch (410) for selectively substantially transmitting or blocking radiation propagating along the second path (A1, A2) in response to the control signal. | ||||||
| 153 | System and method for protecting eye safety during operation of a fiber optic transceiver | US10266869 | 2002-10-08 | US20030128411A1 | 2003-07-10 | 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. | ||||||
| 154 | Automatic power shut-down arrangement for optical line systems | US09205512 | 1998-12-04 | US06504630B1 | 2003-01-07 | William Czarnocha; John G. Israel; Bradley A. McKay; Chu Ng |
| An arrangement is provided which detects the loss of a high power signal in an optical transmission path and the loss of supervisory signal power and, in response thereto, automatically invokes a procedure which causes an optical signal source connected to the fiber to reduce the power level at which it is transmitting optical signals over the fiber to a safe level. More specifically, reduction of optical signal power supplied by an upstream network element by a prescribed amount is achieved by automatically controlling the output power level of the upstream network element in response to the detection of both loss of signal power and loss of supervisory signal power at a downstream network element as a result of a fiber cut, open connector, or other potentially hazardous discontinuity. | ||||||
| 155 | Safe repair of malfunction in optical communication system | US09391750 | 1999-09-08 | US06483616B1 | 2002-11-19 | David J Maddocks; Paul A Callan |
| Following a fault in a bidirectional optical communication system, the lasers which generate traffic-carrying channels and a supervisory channel are shut down to permit personnel to effect repairs safely. The low power supervisory channel is pulsed on at intervals to determine if the fault is still present, but if a receiver is able correctly to restore frame alignment from such a pulse, the reverse direction supervisory channel is enabled, and following frame alignment in both directions, the main lasers are safely turned on. | ||||||
| 156 | Integrated memory mapped controller circuit for fiber optics transceiver | US09777917 | 2001-02-05 | US20020149821A1 | 2002-10-17 | Lewis B. Aronson; Stephen G. Hosking |
| A controller for controlling 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 limit values, generates flag values based on the comparisons, and stores the flag values in predefined locations within the memory. Control circuitry in the controller controls the operation of the laser transmitter in accordance with one or more values stored in the memory. A serial interface is provided to enable a host device to read from and write to locations within the memory. Excluding a small number of binary input and output signals, all control and monitoring functions of the transceiver are mapped to unique memory mapped locations within the controller. A plurality of the control functions and a plurality of the monitoring functions of the controller are exercised by a host computer by accessing corresponding memory mapped locations within the controller. | ||||||
| 157 | Method and arrangement for detecting faults in a network | US934218 | 1997-09-19 | US6160648A | 2000-12-12 | Magnus Oberg; Bo Lagerstrom; Mangus Sundelin; Bengt Johansson |
| The present invention relates to an arrangement and a method for detecting faults in an optical fiber network, comprising at least two nodes arranged with at least two optical fibers to a bus with the end nodes connected via two spare fibers. Every node comprising a central module (50), at least two protection switches (60,61) and optical amplifiers (21,22,23,24) and said central module comprising at least one central processor (51), at least one logical unit (52), at least one protection signal transmitter (53) and at least one protection signal monitor (54). The end nodes of the bus transmit a protection signal in at least one direction of the bus and said end nodes can detect the own protection signal and the protection signal transmitted from the other end node. All nodes in the bus can detect Optical Power Loss, OPL. The bus will reshape into new end nodes in case of a fault. | ||||||
| 158 | Optical network system | US874667 | 1997-06-13 | US5936753A | 1999-08-10 | Tomohisa Ishikawa |
| An optical network system for bidirectional transmission between a main system (e.g., central station) and a plurality of auxiliary systems (e.g., subscriber's stations). The main system outputs a main optical signal to a main fiber. The auxiliary systems output auxiliary optical signals to a plurality of auxiliary fibers, respectively. The main fiber and the auxiliary fibers are network-connected by a connecting unit. The main system has a detector for detecting the auxiliary optical signals and a control signal generator for generating a control signal including data for designating a specific auxiliary system whose auxiliary optical signal is not detected. The main optical signal in the auxiliary fiber corresponding to the specific auxiliary system is attenuated according to the control signal. Accordingly, laser hazard in each auxiliary system is prevented. | ||||||
| 159 | Network traffic protection system | US323758 | 1994-10-17 | US5757774A | 1998-05-26 | Akihiko Oka |
| A failure detector, connected to receive a signal from an interface at a lower level than the SONET level, detects a failure in that interface, such as a fiber cut or the loss of signals. An AIS generator is responsive to the detection of a failure by the failure detector to generate an AIS at the SONET level (STS and VT levels). A signal processing circuit converts a low-level signal from the interface to an SONET-level signal. When receiving the SONET-level AIS from the AIS generator, the signal processing circuit inserts it onto the SONET-level signal for application to SONET ADMs. | ||||||
| 160 | Optical transmission line system | US477538 | 1990-02-09 | US5099349A | 1992-03-24 | Hiroshi Yoshida; Takashi Kihara |
| An optical transmission line system includes a first optical transmission line equipment having a pair of a first optical signal transmission unit and a first optical signal reception unit, and a second optical transmission line equipment having second optical signal transmission and reception units which are connected to the first optical signal transmission and reception units through downstream and upstream optical transmission lines. When light stoppage is detected by the optical signal reception unit due to the occurrence of a disconnection or other breakage in the optical transmission lines, a corresponding optical signal transmission unit reduces the transmission level of the light transmission signal to a level harmless to the human eye. In order to reduce the level of transmission, the optical signal transmission unit converts all the main signal data bits to "0" and sends only the small number of supervisory information bits to the optical signal reception unit of the other side. The optical signal reception unit operates so as to reduce the level of transmission of the optical signal transmission unit forming a pair with that unit. | ||||||
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