[Презентация] Lasers

Lasers are devices that create intense light beams through the process of stimulated emission

The first operational laser was created in 1960 by American physicist Theodore Maiman. This marked the beginning of the era of laser technology, which today is widely used in various fields ranging from medicine to telecommunications

Intense stimulated light emission Intense stimulated light emission forms the basis of laser operation. During this process atoms of the substance transition to an excited state due to an external energy source, typically light or electric discharge. As atoms return to their initial state, they emit photons with the same frequency, phase, and direction of propagation. This phenomenon allows for the generation of powerful and coherent light beams applicable in various fields including material cutting, data transmission, and medicine Strengthening light through atom excitation Strengthening light through atom excitation is the basis of laser operation. When atoms of a substance absorb energy they transition to an excited state. Upon returning to the ground state they emit photons that have the same frequency and phase resulting in coherent light emission. This process is called stimulated emission and forms the foundation of laser operation. Atom excitation can occur via various methods including electrical discharge, optical excitation, or chemical reactions

Gas lasers Gas lasers use a mixture of gases to produce intense light emission. They operate with various gases such as helium-neon, carbon dioxide, and nitrogen. These lasers are widely employed in medicine, science, and industry because of their high precision and efficiency. For example, carbon dioxide lasers are used in surgery for accurate cuts and tissue burning, while helium-neon lasers are frequently used in scientific research due to their stability and single-color characteristics Solid-state lasers Solid-state lasers use crystalline or amorphous materials as the active medium. The most common example is yttrium aluminum garnet (YAG) doped with neodymium (Nd:YAG). These lasers can generate continuous radiation or high-power pulses. They are widely used in medicine, telecommunications, material processing, and scientific research because of their reliability and efficiency

Lasers are widely used in medicine, industry, science, and even in everyday life. They are employed for precise surgical procedures, material processing, and the creation of microchips. In scientific research, lasers assist in studying atomic structures and conducting highly accurate experiments. In household applications, laser technologies are utilized in CD reading devices and laser pointers