An optical network is a communication system that uses light signals, instead of electronic ones, to send information between two or more points. ... Optical networks comprise optical transmitters and receivers, fiber optic cables, optical switches and other optical components.
Optical physics use and develop light sources that span the electromagnetic spectrum from microwaves to X-rays. The optical physics includes the generation and detection of light, linear and nonlinear optical processes, spectroscopy, lasers and laser spectroscopy.
There are many applications for laser, optics and photonics other than medicine. The other fields where the laser, optics and photonics are used are industries, defence, and scientific researchers. The development in this sector leads to the betterment of human life. This also affects the economic growth of the country. Some of the applications are ultrafast laser pumping, biophotonics research, annealing, LED laser lift-off, chemical detection and LIDAR.
Quantum materials are a promising and broad class of materials that should enable technologies of the future, just as they enable technologies like MRIs, biosensors, and disk drives today.
Quantum physics is the study of the smallest particles which are likely to be the fundamental particles of universe. Quantum physics is necessary to understand the properties of solids, atoms, nuclei, sub nuclear particles and light. Its Subfields include: Quantum computing, Quantum cryptography, Quantum teleportation. Quantum cryptography the science of sending secret messages through a quantum channel. It uses properties of quantum mechanics to establish a secure key, a method known as quantum key distribution. Quantum computers boost processing power as they use quantum bits, or qubits. The most accurate clocks in the world, atomic clocks, use principles of quantum theory to measure time. Quantum techniques can also be useful to reducing the noise present in laser beams, a method known as squeezing.