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Mody, divergence,obří impulzy.pdf - FBMI

Mody, divergence,obří impulzy.pdf - FBMI

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DIVERGENCE SVAZKU<br />

1) Pro Gaussovský svazek se průměr svazku mění dle<br />

w z = w 0 [ 1 + (l z / (p w o) 2 )] 1/2 - pro intenzitu 1/e 2 od osové<br />

intenzity svazku (q 0)<br />

pro velké hodnoty z platí<br />

[l z /(p w o 2 )] >> 1<br />

<strong>divergence</strong> (far field)<br />

w(z) / z = q = l / (p w o)

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