Couple basic questions

[dsli_jon]

Umm,

..This longer area of the rectangle is the fast axis.

Friendly-neighborhood Post-Police, here, Sir, with just a small clipping to offer an 'alternative view point' -

* In the vertical (short) direction, the height (e.g. 1 μm) is ..(blah, blah, blah..) Because of the small aperture size, the beam divergence in this direction is relatively high, with a beam divergence half-angle of.....(blah, blah, blah..) Due to that fast divergence, this is called the fast axis direction.

* In the long direction (slow axis direction), the stripe width may be e.g. 50, 100, 200 μm, or even larger, so that the light is distributed over many spatial modes in this direction. As a result, the beam divergence is much larger than for a.. ..(blah, blah, blah..) although still significantly smaller than for the fast axis direction. ..(blah, blah, blah..) The beam quality in terms of focusability is reduced; ..(blah, blah, blah..) Furthermore, the beam profile may be multi-peaked in the horizontal direction, and the shape of the intensity pattern may depend on the injection current. .....The broader the stripe, the higher is the achievable power, but the worse is the beam quality in the “slow” direction.

..I'm sure that's what you meant / was just a typo, there, Sir...

peas..
j

[steve-o]

Um .. ok Jon ..

[ADROIT]

*Im replying to this to bookmark for myself since im on a public computer and em trying to view this at home since it contains quality information*

[norty303]

Actually Jon, steve-o was right, as he referred to the shape of the stripe at range, not up close

The fast axis will look like this up close | but move to a wide rectangle at range. It starts thinner, but gets wider, faster... (hence, etc, etc... )

There will be a point in space where the fast axis produces a width, the same as the slow axis width (e.g. a square)

[dsli_jon]

Actually....he referred to the shape of the stripe at range, not up close

Ah, I think I see how he was trying to explain it... case of 'Tomaaato' vs 'Tomaahto' No offense meant, Sire Steve.. was just pointing out the 'technical facts' from the article... carry on!

j

[steve-o]

No prob We are talking about a bare diode with no collimation lens, right?