Question

0.25 mm long InGaAsP laser has an internal loss of 

40cm−140cm−1

 . It operates at 1550 nm in single mode, with a modal index of 3.3 and a group index of 3.4. Given that the gain varies as 

G=GN(N−N0)G=GN(N−N0)

, and 

GN=6×103s−1GN=6×103s−1

 and 

N0=1×108m−3N0=1×108m−3
Find the photon life time, assuming that the facet reflectivities are due to Fresnel reflections

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Answer 1

Answer:

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