OPTICAL SWITCHING-SEED,Bipolar Controller Modulator
OPTICAL SWITCHING It is a process by which an optical signal can be routed to a desired communication path without converting them to electrical signal. There are two types of optical switches slow switch-used to route around a fault in the optical fiber Fast Switch-uses Electro optic or magneto optic effect for switching There are 3 broad classification of switches 1.Mechanical Method Mirrors and prisms are used to divert incoming optical signals to the required path. They can be controlled easily as they are simple in structure.Miniaturization and application in large scale communication equipment is difficult. 2. MEMS (Micro electro mechanical systems) The Mechanical components,sensors and actuators are fabricated on a silicon substrate.They are ideal for large scale switching.Their Power consumption is minimal.They need high processing capabilities for manufacturing. 3.Optical Wave guide Method These switches utilize the refractive index of substrates to guide opti...