Question

Nd-yag laser more efficient then ruby laser. justify ​

Answer 1

Answer:

Helium neon laser is better than ruby laser or most of the four level lasers are better than three level lasers due to the following reasons:

The laser output is continuous in the case of helium-neon laser. But it is in the form of pulse in the ruby laser.

Ruby laser requires high power pumping source, whereas Helium-neon laser requires low power pumping source like electric discharge.

Efficiency of helium-neon laser is more than ruby laser.

The defects due to crystalline imperfections are also present in the ruby laser. But it is not so in the helium-neon laser.