Isolation Defined:

The two main factors which determine isolation are the extinction level of the polarizers and rotator optic, and the radial uniformity of the Faraday rotator. The radial uniformity is the angle of rotation across a cross section of the rotator optic. The following equation give the isolation ratio (I.R.) due to radical uniformity for a Faraday rotator when placed between polarizers having an extinction of ≥10-5 for a Gaussian beam:
I.R. = -10log P Leakage/P Incident
or: I.R. =
Isolation Ratio due to radial uniformity

Where:
a = Clear aperture radius
w = Gaussian beam 1/e2 intensity, radius = 2/3 of clear aperture
βr = Radial variation of rotation = θ(r) -θ on axis

• Introduction
  
• Operation of a Faraday Isolator
  
• Broadband Isolators for Ti:Sapphire and Other Tunable Lasers
  
• Operation of Broadband Isolators
  
• Dispersion in Ultrafast Ti:Sapphire Lasers; Sellmeiers Equation for TGG
  
• Key Optical Components of a Faraday Isolator
  
• Optical Component Specifications
  
• Isolation Defined
  
• Pulsed Damage Threshold; Root “T” Scaling