Answer to Question #60470 in Optics for Amit Sharma

Question

Discuss applications of lasers in medicine and communication.

Answer 1

Used in surgery and therapy. Laser scalpel - surgical instrument for cutting tissue. Main advantages: small injuries because of the small width cut and of a little bleeding. Laser scalpel used for operation on the retina, the treatment of eye diseases (cataract, retinal detachment, laser eye correction). Used in cosmetics (laser hair removal, erasing tattoos, age spots).
Laser communication
The higher the carrier frequency channel, the greater its capacity. Therefore, the transfer occurs for all smaller wavelengths. The length of the light wave several orders of magnitude smaller than the wavelength radio wave. Therefore, by laser can transmit a much larger amount of information. Laser communication is carried in open and closed structures (eg, optical fiber). In optical fiber the laser light is distributed over long distances with little or no loss.