Operating Wavelength Of He Ne Laser

In frequency stabilized mode the laser will keep its lasing frequency i e wave.

Operating wavelength of he ne laser.

The helium neon laser operates at a wavelength of 632 8 nanometers nm in the red portion of the visible spectrum. A helium neon laser or he ne laser is a type of gas laser whose gain medium consists of a mixture of 90 helium and 10 neon at a total pressure of about 1 torr inside of a small electrical discharge the best known and most widely used he ne laser operates at a wavelength of 632 8 nm in the red part of the visible spectrum. The laser light produced then also has a band. The 632 8 nm optical light is emitted by the laser when the neon atoms decay from an excited.

Consequently an uncertainty of this magnitude can be assigned for the wavelength of the laser even if it has not been calibrated and even if the laser is not frequency stabilized. Pump source high voltage power supply. The helium neon laser consists of three essential components. He ne laser has very good coherence property.

Thus we get a band of frequencies eligible to participate in stimulated emission and thus to be amplified. He ne laser can produce three wavelengths that are 1 152µm 3 391 µm and 632 8nm in which the 632 8nm is most common because it is visible usually in red color. In he ne laser pumping occurs through collision of electrons and atoms during an electrical discharge. Thorlabs stabilized helium neon laser with a center wavelength of 632 991 nm allows for either frequency or intensity stabilization necessary for many spectroscopy interferometry and wavemeter applications.

From the wavelength of the he ne laser line λ 6 328 x 10 7 m calculate its frequency. He ne laser tube has very small length approximately from 10 to 100cm and best life time of 20 000 hours. In addition to the applications listed to the right hene lasers are widely used in education and as alignment tools due to their excellent beam quality and gas discharge laser characteristics.