An uncoated FPA has peak gain wavelength 1.8μm, mode spacing of 0.8n – McqOptions

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1.	An uncoated FPA has peak gain wavelength 1.8μm, mode spacing of 0.8nm, and long active region of 300 v. Determine RI of active medium.
A.	4.25×106
B.	3.75×107
C.	3.95×107
D.	4.25×109
Answer» C. 3.95×107

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