Construction of helium neon laser

Dear Friends today we will discuss the construction of the Helium-Neon laser. The helium-neon laser was the first gas laser to be operated successfully. It was fabricated by Ali Javan and his co-workers in Bell Telephone Laboratories in the USA in 1961.

Helium-neon laser used a mixture of 10:1 for its active medium. It consists of a long and narrow discharge tube of a diameter of about 1 cm and about 80 cm long. The mixture is at a pressure of about 1 mm of Hg, the partial pressure of helium gas being 5 to 10 times that of neon.

Active medium: The gas mixture of He and Ne forms the active medium. Ne acts as the active center.

Pumping Source: Electric discharge method is used for pumping and achieving population inversion.

Optical resonator system: A set of mirrors form the optical resonator system.

Construction of Helium-Neon Laser

This is about the construction of Helium-Neon Laser. In the next article, we will discuss the working of Helium-Neon laser.

Kindly Read This Also :

Note from winnerscience: If you want the e-book of all the laser articles that will include the basics of lasers like stimulated absorption, the difference between spontaneous and stimulated emission, Einstein  Coefficients, properties and applications of lasers, complete construction and working of lasers like Ruby laser, He-Ne laser, Carbon dioxide laser, Nd:YAG laser, dye laser, semiconductor laser, holography and additional articles of Q-switching and mode locking, then please contact Note: If you want the e books of, then please check our “Winnerscience Books” page on top of our website.You can post your queries also there.

Share and Like article, please: