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Indice di rifrazione nel vetro<br />

Il parametro di dispersione D ha il seguente legame con n :<br />

d ⎛ 1 ⎞ λ ∂<br />

D= ⎜ ≈− n 2<br />

dλ⎜ ⎟<br />

ν ⎟<br />

⎝ g ⎠<br />

c ∂λ<br />

Il materiale vetroso ha uno “zero” di dispersione attorno a 1250-1300 nm<br />

2<br />

( λ)

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