Patent ID: 11921297
Assignee: KLA CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The system of claim 2, wherein the beam profile of the pump beam from the illumination source is characterized by, D
      
       2
       ⁢
       0
      
     
     -
     
      D
      
       8
       ⁢
       0
      
     
    
    
     D
     
      F
      ⁢
      W
      ⁢
      H
      ⁢
      M
     
    
   
   <
   0.5
  
  ,
 

where D20 is an outermost beam diameter at which the intensity of the pump beam reaches 20%, D80 is an outermost beam diameter at which the intensity of the pump beam reaches 80%, and DFWHM is an outermost beam diameter at which the intensity of the pump beam reaches 50%.