Patent ID: 11860411
Assignee: SOUTHWEST JIAOTONG UNIVERSITY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The super-compact AWG wavelength division multiplexer according to claim 1, the radius R of each of the first and second planar waveguides and a diffraction order m of the AWG satisfy the following two formulas, wherein each of the first and second planar waveguides is formed by the Rowland circle:, R
      ≥
      
       
        
         d
         io
        
        ⁢
        
         n
         s
        
        ⁢
        
         d
         g
        
        ⁢
        
         N
         
          c
          ⁢
          h
         
        
       
       
        λ
        0
       
      
     
     ,
    
   
  
  
   
    
     
      m
      ≤
      
       
        
         λ
         0
        
        ⁢
        
         n
         c
        
       
       
        
         N
         
          c
          ⁢
          h
         
        
        ⁢
        Δλ
        ⁢
        
         n
         g
        
       
      
     
     ,
    
   
  
 

wherein dio denotes a distance between input and output waveguides, ns denotes a mode effective refractive index of a free propagation region waveguide, dg denotes a distance of arrayed waveguides, Nch denotes a number of output channels, λ0 denotes a central wavelength, nc denotes a mode effective refractive index of the arrayed waveguides, Δλ, denotes a channel spacing, and ng denotes a mode group refractive index of the arrayed waveguides.