Light fuse to prevent power overload optical communication systems - optical insurance, optical fibe
Light fuse to prevent power overload optical communication systems - optical insurance
, optical fibeAlmost every electrical device has an over-current protection switch, or fuse. Although there is no fuse in the system of functional role, but it is still considered necessary. However, the optical system, the lack of such a component, so the system can not prevent the excessive damage caused by the input power. Unfortunately, in the laboratory and the operating system, optical amplifiers used more and more common, many people experienced a power overload as cause damage to optical equipment or components to do. Recent years, with the optical fiber carrying a significant increase in power, this problem has a tendency to increase, especially in the channel with large, high-energy lasers and amplifiers for DWDM communication systems. Existing power systems rely on software to protect the main control feedback loop. Here, we introduce another option: Light fuse. It is a passive device, when its power after more than a certain value, it will immediately shut down to avoid suffering big losses. Light the fuse has an input port and an output port. When the input power below a certain threshold, the optical fuse is transparent. However, when input power exceeds the threshold, light fuse immediately become opaque. Figure 1 shows the experimental results of light the fuse. As the input power to the threshold, the output power of the dramatic decrease. This example, the threshold power is about 30dBm (1W). Currently, the threshold power of choice is 25 to 32dBm (300mW to 1.5W), lower the threshold power fuse is under development. When power exceeds the threshold, the output power reduced by about 25dB, that is only 0.3% (typical value of 10dB to 20dB down, and that means down 90% to 99%). When the threshold power is 30dBm (1W), the optical fuse of output power relative input power of the experimental results. To avoid overload damage, light the fuse can be put on sensitive equipment (such as detector) to the input or high-power devices (such as laser or optical amplifier) the output. Optical device which can be placed (for example, the different amplification stages of optical amplifiers). General system of work should not exceed the power threshold power of 50%. Under such conditions, light the fuse caused losses of between 0.5dB to 1dB (80% -90% through the power), the polarization of light the fuse with a low loss and high return loss (low reflection). Simple lack of protection devices, people development and use of complex conservation measures to avoid damage caused by overload, including the use of software-controlled feedback loop. High-power erbium-doped fiber amplifier or Raman amplifier may generate short pulses or power spikes, in order to avoid the resulting injury, you need a fast response time, usually have to use expensive fast detector, switch or attenuator. Shown in Figure 2, light the fuse right away. Enter the high power pulse (shown in red). When the input pulse exceeds the threshold power, the output pulse (blue) are blocked. Response time is less than 5 microseconds. Higher if the input pulse power, reaction time or less. Input pulse red, blue on behalf of the output pulse. Obviously, this experiment the response time of less than 5 microseconds. The same as other passive components, light the fuse for the modulated signals are modulated and non-transparent. Only pigtail form of light fuse in a standard single-mode fiber C and L wave use. However, in theory, light the fuse can be used for other fiber and other band (980nm, 1060nm, 1300nm) of. Light fuse and weld can to the way jumper link. Laboratory equipment in the network or the use of light the fuse, the overload occurs, the only damage to light the fuse itself, without damage to other components or subsystems. Doggie Bridesmaids Doggie Tuxedo Wear Watch Butler Bulldogs vs Connecticut Huskies Online via PC STREAM Remembering a Pet Some Things To Consider When Bathing a Dog Competent partner adds meaning to life Watch Ohio Bobcats Online Game Coverage Pet insurance Ireland: securing future of our pets Europe Ltc Europe Tour Ideas For A Holidays Vacation Preventing Heartgard Overdose in Your Dog Cheap Insurance for your pet Dog Obedience Problems Photographing Your Pet