Laser Beam Divergence

Laser Beam Divergence - Laser Beam Divergence and Seof Size...

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Unformatted text preview: Laser Beam Divergence and Seof Size A TEMOO moo/e laser 6eam has a Gaussian amplifude profile. This beam canno?‘ 6e Perfecflg col/imafed, 17‘ will have some minimum divergence 3iVen by 41 e: —--— 17D where D is fire ’/e? infensifg diamefer of The beam. For A 5-“ 0.5/4") Then 6= O-G37mrad = 0.0365” for D: 1 mm 6 = 0.0637mrad ~T 0.00365' for .D =10mm where fis The focal lenjl‘h of a lens and D' is [1'5 oliamefer‘. For 7120.5/umjf=100mm, and D'=10mm, Then D=6.4/um. For The general case. of a non-collimaTeJ inpu‘l‘ beam 7‘0 The lens, fhe Spo‘f size is 413’ D:.__._. TI‘D’ where s’ is The image disfance as shown ‘9 f L———s’——' and is given bg ‘Hwe Thin lens equaf’ion 1 3...}— 3-1.5"; ...
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Laser Beam Divergence - Laser Beam Divergence and Seof Size...

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