November 15, 2017
      
                  
        
  Author(s)
  Tim O. Thomay,   Sergey  Polyakov,   Elizabeth A. Goldschmidt,   Glenn S. Solomon,   Olivier  Gazzano,   Vivien  Loo
 
       
            
    
    
        As single-photon sources become more mature and are used more often in quantum information, communications, and measurement applications, their characterization becomes more important. Single-photon-like light is often characterized by its brightness, as