What factors affect the quality of the beam?

In laser physics, the quality of the beam concerns how well the laser beam is focused. The higher the quality, the less divergence in the beam. The quality of the beam can be influenced by a number of factors such as the type and quality of the laser components, the type of laser profit medium used, the optical drawing method, power levels and mechanical and thermal voltage on the laser.

There is a compromise between the quality of the beam and the performance of the beam.  When energy is pumped into the laser profitable medium that the laser uses to reinforce light, part of the energy is converted into heat.  Excess heat can result in temperature gradients in the medium that create the effect of the thermal lens, which reduces the quality of the beam. This causes the type of media media used. Lasers of solid states, high -quality T beam lasers are produced by fiber lasers with one mode and lasers of thin disk lasers. Fibrous lasers use oxide oxide oxide oxide doped ions of rare soils such as yytterbium notBO NEVOVIUMY as their media medium, and thin disk lasers use yythrium aluminum pomegrantees subsidized by trivalent ions yytterbium. These lasers can maintain very high beam quality even at the level of several kilowatts. At lower power levels, extremely high beam quality can be produced by Helium-Neon gas lasers and lasers emitting surface semiconductors.

Other laser design components are also important for the quality of the beam, such as the size and configuration of the laser optical resonator. The proposals that put light into the profitable medium along the laser beam path, a technique called the end pumping, produces higher beam quality than lasers with side pumping. Mode cleaners can be used to improve the quality of the beam either handing over the fiber with one mode or by using the lens focusing a non -limited beam through the hole and to the other lensy, which remembers the beam.

The quality of the beam is also influenced by the condition of laser components. Lasers with a solid state may suffer reduced quality if there are defects on the surface of its media that can cause distortion and scattering of wool. The quality is also damaged by incorrectly aligned ingredients that can be caused by mechanical voltages, changes in temperature in the laser environment or thermal expansion of the laser heat. Quality can also affect lens shortcomings.