Isolators with a Broad Tuning Range

Technical Overview

Introduction

The function of the tunable LINOS Faraday isolators in the following chapter is based on a single stage isolator. Precision mechanics allow a continuous adjustment of the interaction between the magnetic field and the TGG crystal without moving any optical components. It is possible to set the rotation angle to any value between 0° to 45° within the wavelength range in order to study the effects of varying degrees of feedback. Easy access to the blocked beam is provided by polarizing beam splitter cubes, which divert the blocked beam by 90°. Precision mechanics allow the exact reproduction of adjustments previously established. And with the addition of an optional micrometer display, an angular resolution in the arc minute range is achievable. The incorporation of very powerful magnets ensures a compact and efficient design.

Operation

The isolator can be mounted on rods, cylindrical mounts or by using the assembly surfaces so that the laser polarization can be oriented horizontally or vertically. The entry and exit polarizers can be easily cleaned by removing the security rings.

Applications

These isolators are suitable for all lasers operating in the 390-420 nm respectively in the 500-1100 nm wavelength range especially for:

• Ar+ and Kr+ lasers
• other Ion lasers
• HeNe lasers
• Other gas lasers
• Diode lasers
• Nd:YAG lasers
• Ti: Sapphire lasers
• Cr:LiCAF lasers
• Dye lasers
• Alexandrite lasers
• Mode-locked lasers
• Short Pulse lasers

Faraday Rotator

For every laser line selected from 390 nm to a maximum of 1100 nm, every polarization direction from 0° to 90° is precise and reproducible.