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I went with Pavilion Integration Corp for a 638nm diode laser.  It works
well and the price was reasonable.  They have pretty good noise control on
their electronics so I think they would be stable enough for what you want.
 They also offer direct modulation, either digital or analog.

Craig


On Thu, Jul 7, 2011 at 8:00 AM, Neil Kad <[log in to unmask]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> Surprisingly I didn't find this topic on a search of the archives, so here
> it is:
>
> Does anyone have experience of the cheaper solid-state and diode laser
> sources?
>
> Wavelength ranges from 450nm up to 560nm?
>
> We need good stability and power control up to 50mW for TIRF
> applications...
>
> I see a number for sale but I'm concerned that these lasers are not up to
> scratch.
>
> What are your thoughts?
>
> Cheers
>
> Neil
>