Chp 27 - Fiber-Optic Light Sources

Question 1

Types of Light Emitting Diodes (LEDs)?

Answer 1

Surface-Emitting, Edge-Emitting

Question 2

Types of Laser Diodes (LDs)?

Answer 2

Edge-Emitting Fabry-Perot (FP)

Question 3

Types of Single-frequency lasers?

Answer 3

Distributed Feedback (DFB), Distributed Bragg Reflection (DBR)

Question 4

Define Spontaneous emission?

Answer 4

The process in which and LED light source creates photons

Question 5

Define incoherent light?

Answer 5

An LED emits photons that are out of phase, these photons

Question 6

Name the process in which an LED light source creates photons.

Answer 6

Spontaneous Emission

Question 7

LED’s emit photons that are out of phase, these photons are referred to as ______ light.

Answer 7

Incoherent

Question 8

LASER stands for?

Answer 8

Light Amplification by the Stimulated Emission of Radiation

Question 9

Main difference between LED and laser is?

Answer 9

laser has an optical cavity for optical feedback

Question 10

process of generating light energy is called

Answer 10

stimulated emission

Question 11

Define Coherent Light?

Answer 11

A Laser emits photons that are in phase

Question 12

Define Stimulated emission?

Answer 12

The process in which a LASER creates photons

Question 13

LED Spectral Width?

Answer 13

Surface Emitting 110 nm

Edge Emitting 50 nm

Question 14

Laser Spectral Width?

Answer 14

VCSEL 0.2 nm to 0.5 nm
FP 1 nm to 3 nm
DFB 0.1 nm to 0.3 nm

Question 15

Which classification of lasers is considered safe?

Answer 15

Class 1