An uncoated FPA has peak gain wavelength 1.8 m, mode spacing of 0.8nm, – McqOptions

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1.	An uncoated FPA has peak gain wavelength 1.8 m, mode spacing of 0.8nm, and long active region of 300 v. Determine RI of active medium.
A.	4.25 10<sup>6</sup>
B.	3.75 10<sup>7</sup>
C.	3.95 10<sup>7</sup>
D.	4.25 10<sup>9</sup>
Answer» C. 3.95 10<sup>7</sup>

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