does the ruby laser treat bolld vessels

Not usually. Laser pointers are usually diode lasers.

1.he-ne laser is gaseous state. Ruby is solid state laser.

2.he-ne laser requires electrical pumping. ruby laser requires optical pumping.

3.he-ne laser has 4 energy levels. ruby has 3 energy level.

4.he-ne laser gives continuous output. ruby laser gives output in form of pulse

5. he-ne laser is cheaper

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.

laser production is done by a solid state active working material.