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Jun 14, 2020 · He-Ne laser is a gas laser that emits red light having wavelength of 632.8 nm. It is widely used in scientific research, industrial applications, medical procedures, and communication because of its coherence, stability, and affordability.
The Helium-Neon (He-Ne) laser is a type of gas laser that has been widely used for various applications due to its coherent and monochromatic output. This article explores the construction, working principle, applications, and energy level diagram of the He-Ne laser in detail.
In He-Ne laser, neon atoms are the active centers and have energy levels suitable for laser transitions while helium atoms help in exciting neon atoms. Electrodes (anode and cathode) are provided in the glass tube to send the electric current through the gas mixture.
A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1) of helium and neon at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge.
A few months after Maiman announced his invention of the pulsed ruby laser, Ali Javan and his associates W. R. Bennet and D. R. Herriott announced their creation of a cw He-Ne laser. This gas laser is a four-level laser that uses helium atoms to excite neon atoms.
Mar 18, 2020 · This gas laser is a four-level laser that use helium atoms to excite neon atoms. It is the atomic transitions in the neon that produces the laser light. The most commonly used neon transition in these lasers produces red light at 632.8 nm.
The helium-neon (HeNe) laser is a type of gas laser that has revolutionized laser technology since its invention. This laser operates on the principle of stimulated emission of radiation and utilizes a helium-neon gas mixture contained within a sealed glass tube.
Helium–neon (He–Ne) lasers are a frequently used type of continuously operating gas lasers, which is also the first demonstrated gas laser (already in 1961 ). Most often, He–Ne lasers emit red light at 632.8 nm at a power level of a few milliwatts and with excellent beam quality.
Perhaps the most well-known gas laser is the helium-neon (He-Ne) laser. Its most most well-known line corresponds to the 3 s 2 –2 p 4 transition at λ = 632.82 nm. This transition is made possible by excitation transfer from atoms at the helium metastable level He*(2 3 S 1 ) to ground state Ne atoms (Willett, 1974).
Apr 3, 2021 · Working of Helium Neon Laser. When an electric discharge passes via the gas, the electron in the quartz discharge tube strike with the Helium and Neon atoms. This excites the Helium and Neon atoms and makes them move to the metastable states of energy 20.61 eV for Helium and 20.66 eV for Neon, above the ground state.
