開放式課程>>工程學群>>超快光學>>第21講 Lesson 6: FROG and SPIDER & Free Talk

第21講 Lesson 6: FROG and SPIDER & Free Talk

 
L21_A
        Lesson 6: FROG and SPIDER & Free Talk
        6-3  Spectral interferometry (SI) 
               Schematic of SI
               Examples: Gaussian pulses
               Phase retrieval algorithm
 
L21_B
        Lesson 6: FROG and SPIDER & Free Talk
        6-3  Spectral interferometry (SI) 
                Application: Dispersion measurement
                Example: 500‐μm‐thick SiO2
        6-4  Spectral phase interferometry for  
                direct E‐field reconstruction (SPIDER)
                Basic idea
                Challenges
  
L21_C
        Lesson 6: FROG and SPIDER & Free Talk 
        6-4  Spectral phase interferometry for  
               direct E‐field reconstruction (SPIDER)
               Challenges
               SPIDER setup
               How does SPIDER overcome the challenges
               Issue 1: Delay and spectral shear coupling
               Issue 2: Need high‐resolution
  
 
L21_D
        Lesson 6: FROG and SPIDER & Free Talk
        6-4  Spectral phase interferometry for  
               direct E‐field reconstruction (SPIDER)
               Issues 3: Need precise delay calibration
               Free Talk:  FROG Algorithms
               Iterative FT algorithm
               Example: Single‐peak pulse
               Example: Double‐peak pulse
               What is generalized projection (GP)

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