[OpenSPIM] laser for openSPIM

[Nikita Vladimirov]

Hi, Emmanuel,

As far as I know, diode lasers always give a beam elongated in one axis. 
I would consider coupling a diode laser to a single-mode fiber, this 
will clean up all other modes except Gaussian (TEM_00). The output of 
the fiber can be collimated into a high-quality beam using an 
off-the-shelf collimator (Thorlabs sells them, for example).

I hope this helps,

Nikita


On 12/02/2018 08:40, Emmanuel DUFOUR wrote:
> Hello
> The laser parts listed in openSPIM are expensive (7000 euros).
> Is there a way to get cheaper lasers work  ?
> I've been trying to make a very small focus point with a cheap red 
> laser diode without success. I often see several points instead of 
> one. And I cant make the point(s) smaller than 0.1 mm .
> But I dont know if it's because of the cheap lenses I use, or the 
> aperture that is too big, or the diode itself (transverse mode pattern ?).
> So, what are the bare requirements for the laser in order to make it 
> focus to a size of about 10 um ?
>
> Thanks for your help
> Emmanuel DUFOUR
>
>
>
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-- 
Nikita Vladimirov, PhD

Preibisch Lab
Berlin Institute for Medical Systems Biology (BIMSB)
Max Delbrück Center for Molecular Medicine (MDC)
Robert-Rössle-Str. 10
Bld. 89, room 1.08
13125 Berlin
twitter.com/nvladimus
github.com/nvladimus

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