Describe The Construction And Working Of Co2 Laser

The most fundamental form of a co 2 laser comprise a gas discharge along with a mix close to which specified above along with a total reflector at one end and an output coupler generally a semi reflective coated zinc selenide mirror at the output ending.

Describe the construction and working of co2 laser.

Co2 laser principle construction and working. In a molecular gas laser laser action is achieved by transitions between vibrational and rotational levels of molecules. The output coupler reflectivity is usually around 5 to 15 percent. Laser medium the pump source and the optical resonator.

The helium neon lasers are most commonly used in college laboratories whereas the carbon dioxide lasers are used in industrial applications. Carbon dioxide lasers are the highest power continuous wave lasers that are currently available. Reflect most part of the light but allows some part of the light to produce the laser beam. Its output can exceed.

Construction of ruby laser. Its construction is simple and the output of this laser is continuous in the co2 molecular gas laser transition takes place between the vibrational states of carbon dioxide molecules. The carbon dioxide laser was the rst high powered infrared laser developed. The ratio of output power to pump power can be as large as 20.

Working of helium neon laser. Co2 lasers are no longer considered in this role. The co2 gas laser uses a mixture of helium nitrogen and carbon dioxide as the active medium. It was invented by kumar patel of bell labs in 1964 and is still one of the most useful.

This discharge tube is filled with gaseous mixture of co2 active medium helium and nitrogen with suitable partial pressures. In this mixture the helium and nitrogen work in concert with the co2to produce the desired lasing effect. Construction of carbon dioxide laser. The one in our laboratory is a new version that everything about it is something you can see touch and adjust from lling the tube with gas aligning the optical elements to measuring the output power and wavelengths.

They are also quite efficient. In those days co2 lasers were developed for defense but it was soon realized that enough of the wavelength is absorbed in the atmosphere to cause severe problems in pointing and focusing the beam at long distances. Ruby laser is one of the few solid state lasers that produce visible light. It consists of a quartz tube 5 m long and 2 5 cm in the diameter.

Co2 laser engraved walnut plaques were a popular item in the 1970s. The discharge tube is filled with a mixture of carbon dioxide nitrogen and helium gases in the ratio of 1 2 3 with water vapors. The laser transition takes place between the vibrational states of co2molecules. Describe the construction and working of carbon dioxide laser.

Here the nitrogen gas acts as buffer gas just like the helium did in he ne laser. Pressures maintained are about p for he 7 torr p for n2 1 2 torr. A ruby laser consists of three important elements. The co2 laser produces a beam of infrared light with the principal wavelength bands centering on 9 6 and 10 6 micrometers.