Question

The active centres in Ruby laser are​

Answer 1

Answer:

The active part of the ruby is the dopant, which consists of chromium ions suspended in a synthetic sapphire crystal. The dopant often comprises around 0.05% of the crystal, and is responsible for all of the absorption and emission of radiation.

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Answer 2

The active centers of ruby lasers are monocrystal of Al₂O₃ consisting of chromium ions

• Ruby laser is a solid-state laser
• It emits red radiation of wavelength 695 nm
• In the active center, Al₂o₃ is doped with Cr³+ ions replacing some Al³+ ions
• The dopant has high chemical stability and durability.
• Initially, Ruby lasers were used for medical purposes like retinal surgery and dermatology.
• But now it is used for removing tattoos and pigmented spots alone.