Question

Assertion : A diode lasers are used as optical sources in optical communication.
Reason : Diode lasers consume less energy.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

A laser diode is a laser where the active medium is a semiconductor similar to that found in a light emitting diode. Laser diode is formed by doping a very thin layer on the surface of a crystal water. They find wide use in optical communication as easily coupled light sources. Diode lasers are efficient sources of high power radiation and with suitable beam shaping technology the output can be easily launched into the cladding of a suitably designed fibre. Hence, preferred in optical communication. They also consume less power.