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m140 or pltb450b

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Turk

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Which is better?
m140 & pltb450b
 

RedCowboy

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NDB7875 is best for that divergence range for power.
 
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Encap

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RedCowboy

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Better? What do you mean--better in what way or ways--for what purpose?

All diodes lasers are poor quality compared to an ideal Gaussian laser beam
See: https://en.wikipedia.org/wiki/Gaussian_beam
There are some pretty good single mode diodes, but an ideal Gaussian beam is hard to beat, very true.

However as the OP asked about a choice between 2 of our common, what I call ( Level 1 ) divergence diodes I offer the 7875 as a better choice for a ( Level 1 ) divergence diode, as far as power, the osram is slightly tighter but not by all that much.

If OP is looking for beam quality then a DPSS is much better, if color without concern for beam quality beyond the original mentioned diodes then M-462 or NDB7675.

Of the 2 OP asked about I say do a search and read, they are close, but for that divergence and those MM diodes why not get a 7875 ?
 
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deadshadow

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from only those 2 i would chose the pltb450b for the slightly better beam profile,but from all the diodes i agree with Redcowboy for the ndb7875 for the combo power-divergence
 
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Lifetime17

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Hi,
My answer to yours , is not whats better I just prefer the PLTB450B diode. I built plenty with it . Divergence is up to you, but it still has a great beam profile. G2 for power 3element for divergence ..

Rich:)
 
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