4/30/2023 0 Comments Fet switchThe capacitance of a transmission line is proportional to its length and it exceeds the capacitance of the transistors in a logic gate when its length is equal to that of a single gate. In electronics, the transmission line needs to be charged to the signal voltage. This comes from the absence of capacitance in the connections between individual logic gates. Perhaps the most significant advantage of optical over electronic logic is reduced power consumption. It is clear, however, that this is achievable in proposed single-photon transistors for quantum information processing. To realistically compete, transistors require a few tens of photons per operation. It remains questionable whether optical processing can reduce the energy required to switch a single transistor to be less than that for electronic transistors. ![]() The more natural integration of all-optical signal processors with fiber-optics would reduce the complexity and delay in the routing and other processing of signals in optical communication networks. Optical transistors can be directly linked to fiber-optic cables whereas electronics requires coupling via photodetectors and LEDs or lasers. This is due to the fact that the speed of light in an optical medium is typically much faster than the drift velocity of electrons in semiconductors. The most commonly argued case for optical logic is that optical transistor switching times can be much faster than in conventional electronic transistors. Optical transistors could in theory be impervious to the high radiation of space and extraterrestrial planets, unlike electronic transistors which suffer from Single-event upset. Further, optical transistors that operate using single photons could form an integral part of quantum information processing where they can be used to selectively address individual units of quantum information, known as qubits. The same devices could be used to create new types of optical amplifiers to compensate for signal attenuation along transmission lines.Ī more elaborate application of optical transistors is the development of an optical digital computer in which components process photons rather than electrons. In principle, all-optical digital signal processing and routing is achievable using optical transistors arranged into photonic integrated circuits. This requires optical-electronic-optical conversion, which form bottlenecks. Although fiber-optic cables are used to transfer data, tasks such as signal routing are done electronically. Optical transistors could be used to improve the performance of fiber-optic communication networks. However, their ability to compete with modern electronics is currently limited. ![]() Implementations using a variety of operating mediums have been proposed and experimentally demonstrated. This is done without converting optical to electronic signals as an intermediate step. Since photons inherently do not interact with each other, an optical transistor must employ an operating medium to mediate interactions. Such technology has the potential to exceed the speed of electronics, while conserving more power. Optical transistors provide a means to control light using only light and has applications in optical computing and fiber-optic communication networks. The device is the optical analog of the electronic transistor that forms the basis of modern electronic devices. Since the input signal intensity may be weaker than that of the source, an optical transistor amplifies the optical signal. ![]() Light occurring on an optical transistor's input changes the intensity of light emitted from the transistor's output while output power is supplied by an additional optical source. An optical transistor, also known as an optical switch or a light valve, is a device that switches or amplifies optical signals.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |