Saturated Absorption: Achieving a Continuous Scan Through Elimination of Mode Hops, Includes Implementation of Feedforward Circuit

1 Saturated Absorption Spectroscopy

1.1 Introduction

1.2 Purpose

1.3 Setup and Procedure

1.3.1 Components and Configuration

1.3.2 Beam Evolution Through Optical Track

1.3.3 Factors Determining Laser Frequency

1.3.4 Scanning Laser's Single-Mode Frequency

2 Mode Hops

2.1 Understanding Mode Hops

2.2 Recognizing Mode Hops and Multi-Mode Operation

3 Eliminating Mode Hops

3.1 Manipulating Competing Mode Structures

3.2 Implementation of the Feed Forward circuit