An optical amplifier has a population density of electrons in the lower state N1 and in the higher state N2 with the relationship for high amplification as:

An optical amplifier has a population density of electrons in the lowe

1.	An optical amplifier has a population density of electrons in the lower state N1 and in the higher state N2 with the relationship for high amplification as:
A.	N2 ≪ N1
B.	N2 < N1
C.	N2 > N1
D.	N2 = N1
Answer» D. N2 = N1

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An optical amplifier has a population density of electrons in the lower state N1 and in the higher state N2 with the relationship for high amplification as:

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