First slide

Opto electronic juction devices

Question

Statement I: Diode lasers are used as optical sources in optical communication.
Statement II: Diode lasers consume less energy.

Moderate

A

Both statements I and II are correct.
B

Statement I is correct but statement II is incorrect
C

Statement I is incorrect but statement II is correct
D

Both statements I and II are incorrect.

Solution

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 wafer. 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.

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