Answer to Question #155616 in Optics for Huzaifa Rehman

Question

In color center laser, what are the active medium, host material, and laser wavelength? Illustrate the factor, on which laser wavelength depends?

Answer 1

 Active Medium:-

Within the laser, this is the source of optical gain. The optical gain results from stimulated emission of molecular or electronic transitions to a state of lower energy from a state of higher energy that was populated previously by a pump source.

Host material:-

the active medium consists of crystalline glass "host" material, which adds a "dopant." this includes chromium, thulium, neodymium, erbium, or ytterbium.

Laser wavelength:-

lasers consist of Ultraviolet radiation of wavelengths between 180 and 400 nm. The region that is the visible region is made up of radiation with wavelengths between 400 and 700 nm (called visible light).

Determining the emitted light wavelength is determined by the difference in energy levels where the excited electron drops. The absorbing biological tissue undergoes either photochemical, Thermal, or mechanical effect when radiation is absorbed:

 The action is primarily photochemical in the ultraviolet region;

The action is primarily thermal in the infrared;

In the visible region, both effects are present.