Diod Learning and physics concept in engineering

Diod Learning and physics concept in engineering

1. NAME:SHYAM POLRA SUBJECT:PHYSICS DEPARTMENT:BAIT ENROLMENT NO:2307020701013 LASERS

2. Introduction to Lasers Lasers are powerful devices that emit highly concentrated and coherent beams of light. These remarkable tools have revolutionized various industries, enabling groundbreaking advancements in fields such as telecommunications, medical treatments, and scientific research. SP

3. Principles of Laser Operation Stimulated Emission Lasers rely on the principle of stimulated emission, where excited atoms release photons that stimulate the emission of more photons, resulting in an amplified, coherent beam of light. Optical Cavity The optical cavity, consisting of mirrors, allows the light to bounce back and forth, further amplifying the laser beam. Population Inversion Lasers require a population inversion, where more atoms are in an excited state than in the ground state, enabling the stimulated emission process.

4. Types of Lasers Gas Lasers These lasers use a gas, such as helium-neon or carbon dioxide, as the active medium. Solid-State Lasers Solid-state lasers utilize a solid-state material, like crystals or glasses, as the active medium. Semiconductor Lasers Semiconductor lasers, or diode lasers, are compact and efficient, using a semiconductor material as the active medium.

5. Applications of Lasers 1 Medical Treatments Lasers are used in various medical procedures, such as eye surgery, cancer treatment, and skin therapy. 2 Telecommunications Lasers are the backbone of modern fiber optic communication networks, enabling high-speed data transmission. 3 Industrial Manufacturing Lasers are employed in precision cutting, welding, and engraving processes, enhancing productivity and accuracy. 4 Scientific Research Lasers are indispensable tools in scientific research, enabling advanced spectroscopy, microscopy, and atomic and particle physics experiments.