Abstract:
A distributed Raman amplifier system is disclosed. Distributed Raman amplifier systems can include a spool of fiber disposed between a distributed Raman amplifier and local or proximate optical point-loss sources, a carrier hotel for example. The spool of fiber has a fiber of sufficient length to offset aggregated losses, which prevents the distributed Raman amplifier from shutting down while also allowing the distributed Raman amplifier to achieve entitled gain by pumping the fiber in the spool.
Abstract:
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.
Abstract:
The optoelectronic transceiver includes first and second controller ICs. Each controller IC includes logic, a memory, an interface, and at least one input port. Each memory is configured to store digital diagnostic data and has a unique serial device address to allow a host access to each of these controller ICs separately and independently At least some of the digital diagnostic data is common to both the first controller IC and the second controller IC. The inclusion of two controller ICs allows the same diagnostic data to be stored in completely different memory mapped locations. This allows hosts that are preconfigured differently to read different memory mapped locations on the different controller ICs to obtain the same diagnostic data.
Abstract:
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.
Abstract:
The invention relates to a standby communication method in optical transmission facilities. According to said method, control signals (CS1, CP1) with busy state information are transmitted and evaluated on the receiver side in addition to a working signal (WS1) and a protection signal (PS1). Said control signals are transmitted over a control channel even when the useful signal is interrupted.
Abstract:
When an unsafe port with a loss of signal is detected, a transceiver may enable one laser in a group of lasers associated with the unsafe port and may disable the remaining lasers. Then, the transceiver may instruct a transmitter associated with the one laser to transmit an optical signal on the unsafe port using a reduced transmit power that is less than a threshold value associated with the Class 1 conditions and at a different time than enabled lasers in other groups of lasers. Alternatively, for a safe port on which valid communication is received, the transceiver may enable lasers in a group of lasers associated with the safe port. Then, the transceiver may instruct transmitters associated with the lasers in this group of lasers to transmit optical signals on the safe port using a normal transmit power for the lasers that is greater than the threshold value.
Abstract:
O presente invento diz respeito a um método para a determinação da ocorrência do efeito de fusível em redes ópticas para identificar univocamente a presença do efeito de fusível e providenciar sinais de alerta que despoletem acções para a sua mitigação. É essencialmente caracterizado por utilizar pelo menos uma rede de difracção escrita em fibras ópticas como sensores de temperatura, colocadas em contacto externo em pontos da fibra óptica a monitorizar. Compreender a seguinte sequência: - verificação da meia largura a meia altura do impulso medido na rede de difracção e a comparação com um intervalo expectável com os valores dados pela expressão T2 = L/(2v) sendo T2 a meia largura a meia altura, L o comprimento da rede de difracção e v a velocidade de propagação da onda térmica, ou caso L/(2v)
Abstract translation:本发明涉及一种用于确定光网络中的光纤熔丝效应的方法,以确定地识别光纤熔丝效应并提供触发缓冲动作的警告信号。 该方法的基本特征在于使用设计有光纤的至少一个衍射光栅作为外部温度传感器与所监视的光纤的点接触。 该方法包括以下连续步骤:检查在衍射光栅中测量的脉冲的半高宽度,并将其与具有由表达式T2 = L /(2v)提供的值的预期间隔进行比较,其中T2是半 高光束宽度,L是衍射光栅长度,v是热波的传播速度,或当L /(2v)<20f时,表达式T2 <20 / f,其中f是询问系统的采样率; 在两个衍射光栅的情况下比较脉冲之间的时间间隔,其中设计具有由表达式Δt= v / d提供的值,其中v是热波的传播速度,d是当两个光栅之间的间隔时 明确地检测出热波的存在; 发出警告信号以激活释放/限制过程,特别是警告光栅的发射器的自动关机。 本发明还涉及一种用于执行所述方法的监视器。
Abstract:
Safety and power control arrangement and method for optical communication apparatus, where a first circuit pack emitting an optical signal (OS1) and at least a second and a third circuit pack (2, 3) are connected in series via optical fibers (4, 5). A power monitor (26) connected to an output (27) of the at least second circuit pack (2) reduces the signal power (PW2) output from the second circuit pack (2) to a pre-determined safe value if a loss-of signal monitor (34) of a next circuit pack (3) forwards a loss-of-signal control signal (LOC3). The advantage is that the maximum allowable value is achieved at the input of an interrupted fiber section and the non-interrupted circuits can still receive the optical signals with a reasonable power level.
Abstract:
The present invention relates to a method to protect human eyes in optical communication system. Said method is applied to channel layer of said optical communication system, and includes protection process and restoration process. In said protection process, the connected optical fiber multiplexing segments can be detected at the terminal node. In order to realize human eyes protection, said multiplexing segments are shutdown or the optical transmission power is reduced after the fault is detected. Said restoration process can detect optical fiber status , and restore normal operating state of the system after the line repair. The method of the present invention can control all channel power devices within affected multiplexing segments by channel layer, and provide required human eye protection function without the other devices such as electric-controlled optical attenuator (EVOA), thereby can significantly reduce system complexity and costs. Meanwhile, restoration process detects line condition with the method of transmitting power over channel layer, and utilizes message structure of pulse train, thus avoids over strong power level for the reasons that all channel are switched on/off together.