Construction And Working Of Co2 Laser Ppt

Laser medium the pump source and the optical resonator.

Construction and working of co2 laser ppt.

Consider 2 energy levels e 1 and e 2. This video lecture will explain the construction of carbon dioxide laser. Co2 laser was the first molecular gas laser developed by indian born american scientist prof c k n pillai it is a four level laser and it operates at 10 6 μm in the far ir region. Absorption spontaneous emission and stimulated emission.

When the flash lamp light will be flashed on ruby rod the chromium ions excited to higher energy states. It is a very efficient laser. The active laser medium laser gain amplification medium is a gas discharge which is air or water cooled depending on the power being applied. In co 2 molecular gas laser transition takes place between the vibrational states of carbon dioxide molecules.

Co2 lasers are no longer considered in this role. Working of helium neon laser. 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 working of a laser diode involves 3 processes.

It emits deep red light of wavelength 694 3 nm. Construction and working of he ne laser 15. Let us first understand the process of absorption. It was the first molecular gas laser developed by indian born american scientist prof c k n pillai.

The filling gas within the discharge tube consists of around 10 20 carbon dioxide co 2 around 10 20 nitrogen n 2 a few percent hydrogen h 2 and or xenon xe usually only used in a sealed tube and the remainder of the. Co2 molecular gas laser. Its construction is simple and the output of this laser is continuous. Co2 laser engraved walnut plaques were a popular item in the 1970s.

After staying for up to 10 8 second ions get transmitted to the metastable state. The laser radiation of a wavelength of 6943a0 and laser emission is pulsed one. A ruby laser consists of three important elements. Ruby laser is one of the few solid state lasers that produce visible light.

For simplicity let us assume e 1 is the lower energy level and e 2 is the higher energy level. Helium neon laser usually called a he ne laser is a type of gas laser in which a mixture of helium and neon gas is used as gain medium. Construction of ruby laser. Working of laser diode.