- #1

zak8000

- 74

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## Homework Statement

Consider a Fabry-Perot laser, length 0.1m, with an unsaturated gain coefficient, [itex]\gamma

_{o}[/itex]=1m

^{-1}

one of the mirrors of the Fabry-Perot cavity is perfectly reflecting, the other reflects 95% of the light and transmits 5%. wit the aid of a brief calculation explain why steady state laser oscillation is expected?

i had no idea on how to approach this question so i did some research and i found this book kind of helpful under this link:

http://books.google.co.nz/books?id=...rip gain greater than round trip loss&f=false

## Homework Equations

after reading a chapter in the book the steady state condition is R1R2exp(2aL-j2wL/c)=1

## The Attempt at a Solution

since i am not given any frequency value i only solved the condition for the round trip amplitude coefficent and the way i calculated it was R1R2exp(2aL)=1 --->0.95exp(2*1*0.1)=1.15

please help i cam confused on how to prove this