On Tue, 9 Jul 2002, Peter L. Peres wrote:
> In theory, about c/(2*lambda) Hz (== Bauds in this case). In practice, as
> much as you can drive the device to. Diodes for high data rates have
> special design (like controlled impedance feeds and such). I once had a
> book that showed how to interface a laser diode to a ham RF transmitter
> for 432MHz. It consisted of an impedance matching network and a fast diode
> or two, plus a very simple bias network that used a D cell I think. The Tx
> ran 10-20W into the air cooled diode.

and later added:
> The actual limit is lower than I implied, the modulation is deteriorated
> by the decay time of the intermediary laser levels (the non-lasing
> transitions). However frequency-modulated lasers apparently do not have
> this limit ?

I thought really high data rates used external (electro-acoustic?)
modulators.

-- Dave Tweed

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