Question:medium

Which optical source is preferred for long-distance, high-speed fiber communication?

Show Hint

Optical communication sources: \[ \boxed{ \begin{aligned} \text{LED} &\rightarrow \text{Short distance, low cost} \text{Laser diode} &\rightarrow \text{Long distance, high speed} \end{aligned} } \]

Updated On: Jul 14, 2026

LED
Laser diode
Photodiode
LDR

Show Solution

The Correct Option is B

Solution and Explanation

Was this answer helpful?

Top Questions on communication systems

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:
- CUET (PG) - 2025
- Nanoelectronics
- communication systems
View Solution

Match List-I with List-II:

List-I (Modulation Schemes)	List-II (Wave Expressions)
(A) Amplitude Modulation	(I) \( x(t) = A\cos(\omega_c t + k m(t)) \)
(B) Phase Modulation	(II) \( x(t) = A\cos(\omega_c t + k \int m(t)dt) \)
(C) Frequency Modulation	(III) \( x(t) = A + m(t)\cos(\omega_c t) \)
(D) DSB-SC Modulation	(IV) \( x(t) = m(t)\cos(\omega_c t) \)

Choose the correct answer: