Working of heliumneon laser in order to achieve population inversion, we need to supply energy to the gain medium. When energy from the pumping source is applied hene gas mixture then some of the energy is observed by the helium atoms. Commercial lasers data sheets lumentum operations llc. Hene laser construction and working helium neon laser definition.
The laser process in a hene laser starts with the collision of electrons with the helium atoms in the gas by the electrical discharge. The aim of this work was to evaluate the efficacy of helium neon hene laser therapy on post mastectomy lymphedema and shoulder mobility. The heliumneon laser, short henelaser, is one of the most common used laser for allignement, reference laser and optics demonstrations. It also has lasing transition in ir, orange and green. Construction and working of helium neon laser youtube.
Construction of helium neon laser a continuous and intense laser beam can be produced with the help of gas lasers. It was the first gas laser invented by javan et al in 1962 at bell telephone laboratories. Heliumneon hene lasers properties and applications. In heliumneon lasers, we use high voltage dc as the pump source. A helium neon laser or hene laser is a gas laser consisting of a mixture of neon and helium within a small bore capillary tube, which is excited by a dc electrical discharge. Its discharge tube is fitted with 80% helium and 20% neon gas.
The neon is the lasing or active medium in this tube. This electric discharge excites helium from the ground state, to the longlived, metastable excited states. Today let us discuss the working of helium neon laser. A broad selection of commercial laser products including kw class, ultrafast, qswitched, and lowpower continuous wave lasers commercial lasers data sheets lumentum operations llc skip to. It is the most common type of a laser used in physics laboratories.