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Your AOTF is more likely to experience problems than a modulated diode. The
AOTF is dependent on a consistent RF tuning which can drift over time.
Diodes on the other hand are dependent on their current feedback circuits.
Older laser diodes did not have the benefit of superior current and
temperature controls that are used now, so I agree that early generation
units might suffer from modulation, but newer units should take it without
complaint. There will be duty cycles and frequency regimes that will be
easier on the diode, mostly for thermal reasons. This can be mitigated by
the design of the package and electronics.

Craig
On 2013-10-17 12:39 PM, "Laevsky, Gary S." <[log in to unmask]> wrote:

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>
> Hi All,
>
> It was always my impression that direct modulation of a diode shortened
> the lifetime of said diode, vs pumping it at some constant voltage and
> modulating through an aotf.
>
> Recently, I have been informed this is not the case, at least using the
> OBIS LX lasers.
>
> Not that I would ever doubt anything I've ever been told, but a supporting
> second opinion would be nice.
>
> Thanks.
>
>
> Best,
>
> Gary
>
>
>
> Gary Laevsky, Ph.D.
> Confocal Imaging Facility Manager
> Dept. of Molecular Biology
> Washington Rd.
> Princeton University
> Princeton, New Jersey, 08544-1014
> (O) 609 258 5432
> (C) 508 507 1310
>