(i) Can you obtain the laser without metastable state? How the problem of two level laser has been sorted out in three and four level laser? (ii) A semiconductor laser of cavity length 500 pm has a threshold gain coefficient of 35 cm1. If the reflectivity of the mirror is 55% each, what will be the loss coefficient of the system (in cm 1).
(i) Can you obtain the laser without metastable state? How the problem of two level laser has been sorted out in three and four level laser? (ii) A semiconductor laser of cavity length 500 pm has a threshold gain coefficient of 35 cm1. If the reflectivity of the mirror is 55% each, what will be the loss coefficient of the system (in cm 1).
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B7
Transcribed Image Text:(i) Can you obtain the laser without metastable
state? How the problem of two level laser has
been sorted out in three and four level laser?
(ii) A semiconductor laser of cavity length 500
um has a threshold gain coefficient of 35 cm1.
If the reflectivity of the mirror is 55% each, what
will be the loss coefficient of the system (in cm
1).
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