LED Characteristics MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “LED Characteristics”. 1. Linearizing circuit techniques are used for LEDs.a) Trueb) False 2. The internal quantum efficiency of LEDs decreasing _______________ with ________________ temperature.a) Exponentially, decreasingb) Exponentially, increasingc) Linearly, increasingd) Linearly, decreasing 3. Intrinsically _________________ are a very linear device.a) Injection lasersb) […]

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LED Structures MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “LED Structures”. 1. In optical fiber communication _____________ major types of LED structures are used.a) 2b) 4c) 6d) 3 2. As compared to planar LED structure, Dome LEDs have ______________ External power efficiency ___________ effective emission area and _____________ radiance.a) Greater, lesser, […]

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Mid – Infrared and Far – Infrared Lasers MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “Mid – Infrared and Far – Infrared Lasers”. 1. Auger current is mostly ___________________ for material with band gap providing longer wavelength emission.a) Unaffectedb) Lesserc) Largerd) Vanishes 2. Injection lasers operating in smaller wavelengths are subjected to increased carrier losses.a) Trueb) False […]

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Narrow – Linewidth and Wavelength – Tunable Lasers MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “Narrow – Linewidth and Wavelength – Tunable Lasers”. 1. _______________ occurs as a result of the change in lasing frequency with gain.a) Frequency multiplicationb) Dispersionc) Attenuationd) Line-width broadening 2. Laser cavity length can be extended by ___________a) Increasing the refractive indexb) Reducing […]

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Injection Laser Characteristics MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “Injection Laser Characteristics”. 1. The process where the energy released during the recombination of an electron-hole event getting transferred to another carrier is known as __________a) Inter-valence bond absorptionb) Auger recombinationc) Carrier leakage effectsd) Exothermic actions 2. Auger recombination can be reduced […]

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Single – Frequency Injection Lasers MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “Single – Frequency Injection Lasers”. 1. Device which apply the frequency-selective feedback technique to provide single longitudinal operation are referred to as ________________a) DSM lasersb) Nd: YAG lasersc) Glass fiber lasersd) QD lasers 2. Which of the following does not provide single […]

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The Semiconductor Injection Laser MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “The Semiconductor Injection Laser”. 1. In semiconductor injection laser, narrow line bandwidth is of the order?a) 1 nm or lessb) 4 nmc) 5 nmd) 3 nm 2. Injection laser have a high threshold current density of __________a) 104Acm-2 and moreb) 102Acm-2c) 10-2Acm-2d) 10-3Acm-2 […]

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