L8_A 
       Lesson 3: Light‐matter Interaction

       3-1  Saturable absorber 

                Rate equations of saturable absorber

                Dynamic field loss coefficient

                Rate equation of ground state density

 

L8_B
       Lesson 3: Light‐matter Interaction

       3-1  Saturable absorber

                Fast saturable absorber (SA)

                Slow SA dynamics: Stage 1

                Slow SA dynamics: Stage 2

 

L8_C
       Lesson 3: Light‐matter Interaction

       3-1  Saturable absorber

                Slow SA dynamics: Stage 2

                Example: Semiconductor SA mirror

                Example: Graphene

 

L8_D
       Lesson 3: Light‐matter Interaction

       3-2 Dynamic gain

             Rate equations of gain medium

             Rate equation of upper‐state density

             Slow gain dynamics: Stage 1

             Slow gain dynamics: Stage 2