Direct Detection Receiver and Optical Amplification MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Direct Detection Receiver and Optical Amplification, a fundamental topic in the field of Optical Communication. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Direct Detection Receiver and Optical Amplification MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Direct Detection Receiver and Optical Amplification mcq questions that explore various aspects of Direct Detection Receiver and Optical Amplification problems. Each MCQ is crafted to challenge your understanding of Direct Detection Receiver and Optical Amplification principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Optical Communication tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Direct Detection Receiver and Optical Amplification MCQs are your pathway to success in mastering this essential Optical Communication topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Direct Detection Receiver and Optical Amplification. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Direct Detection Receiver and Optical Amplification MCQs | Page 2 of 11

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Q11.
The incident optical power required to achieve a desirable SNR is 168.2 nW. What is the value of incident power in dBm?
Discuss
Answer: (a).-37.7 dBm
Q12.
In the equation given below, what does ฯ„ stands for?

Zโ‚˜ = ฮทPโ‚€ฯ„/hf
Discuss
Answer: (b).Time
Discuss
Answer: (c).Dark current noise and Quantum noise
Q14.
The dominating effect of thermal noise over the shot noise in photodiodes without internal gain can be observed in wideband systems operating in the range of ________
Discuss
Answer: (b).0.8 to 0.9 ฮผm
Q15.
A silicon p-i-n photodiode incorporated in an optical receiver has following parameters:

Quantum efficiency = 70%
Wavelength = 0.8 ฮผm
Dark current = 3 nA
Load resistance = 4 kฮฉ
Incident optical power = 150 nW.
Bandwidth = 5 MHz

Compute the photocurrent in the device.
Discuss
Answer: (a).67.7 nA
Q16.
In a silicon p-i-n photodiode, if load resistance is 4 kฮฉ, temperature is 293 K, bandwidth is 4 MHz, find the thermal noise in the load resistor.
Discuss
Answer: (d).1.61 × 10โป¹โท A²
Q17.
________________ is a combination of shunt capacitances and resistances.
Discuss
Answer: (c).Shunt admittance
Q18.
______________ is used in the specification of optical detectors.
Discuss
Answer: (a).Noise equivalent power
Q19.
A photodiode has a capacitance of 6 pF. Calculate the maximum load resistance which allows an 8MHz post detection bandwidth.
Discuss
Answer: (d).3.32 kฮฉ
Q20.
The internal gain mechanism in an APD is directly related to SNR. State whether the given statement is true or false.
Discuss
Answer: (a).True