Describe The Construction And Working Of Co2 Laser

Ruby laser is one of the few solid state lasers that produce visible light.

Describe the construction and working of co2 laser. Carbon dioxide laser consists of a discharge tube having a diameter of 2 5cm and a length of about 5m. 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. Reflect most part of the light but allows some part of the light to produce the laser beam. Describe the construction and working of carbon dioxide laser.

The co2 gas laser uses a mixture of helium nitrogen and carbon dioxide as the active medium. Carbon dioxide lasers are the highest power continuous wave lasers that are currently available. The carbon dioxide laser was one of the earliest gas lasers to be developed. Construction of carbon dioxide laser.

In this mixture the helium and nitrogen work in concert with the co2to produce the desired lasing effect. In a molecular gas laser laser action is achieved by transitions between vibrational and rotational levels of molecules. The carbon dioxide laser was the rst high powered infrared laser developed. A ruby laser consists of three important elements.

The ratio of output power to pump power can be as large as 20. The laser transition takes place between the vibrational states of co2molecules. 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. Construction of ruby laser.

This discharge tube is filled with gaseous mixture of co2 active medium helium and nitrogen with suitable partial pressures. It emits deep red light of wavelength 694 3 nm. They are also quite efficient. Pressures maintained are about p for he 7 torr p for n2 1 2 torr.

Co2 laser engraved walnut plaques were a popular item in the 1970s. Co2 lasers are no longer considered in this role. 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. 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.

Co2 laser principle construction and working. The output coupler reflectivity is usually around 5 to 15 percent. It was invented by kumar patel of bell labs in 1964 and is still one of the most useful. Laser medium the pump source and the optical resonator.

Its output can exceed. Here the nitrogen gas acts as buffer gas just like the helium did in he ne laser. Working of helium neon 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.