Chapter 6: Modulation Method 1

Reflective Mode

Basic setup BAsic setup

Basic Principle

Reflected Power, Pr = f

Pr is depends on probe configuration

Input source variation and component losses must be compensated

Probe configurations Types of fiber

Output characteristics output

IMOFS for reflective mode

Temperature sensor Temperature sensor

Metallic cylinder

Filled with wax as a medium

Output Voltage vs temperature

Optical Power with d in different configurations Optical power output

Transmission Mode

Example of IMOFS

Microbending Effect

Basic setup Microbending effect

Basic principle Basic principle for microbending

Loss Compensation scheme example of loss compensation scheme

Intensity Modulated Sensor