Re: Amplitude modulators

Assuming you mean an MZI-based modulator, it shouldn't be a problem, except
that I wouldn't expect extremely flat frequency response at these rates.
Although the RF port of most modulators are AC coupled, they should easily
pass anything above a few kHz.  Generally, the response below about 1GHz is
not very carefully engineered, so you need to just take what you get.

Regarding analog modulation, a standard MZI will work fine within some basic
constraints.  The overall response is a raised cosine, so you get only
approximately linear EO response even when operated properly.  You need to
ensure that the electrical signal is well less than Vpi because the
linearity decreases as you get closer to Vpi.  You also need to ensure that
the device is biased properly - typically quadrature to minimize second
harmonic distortion.

MD

On 11/6/03 2:20 PM, in article [EMAIL PROTECTED],
"Frank Knappe" <[EMAIL PROTECTED]> wrote:

> Hallo!
> 
> Is it possible to use a 2.5Gb/s or 10Gb/s Digital Amplitude Modulator
> (for instance from JDS) also at lower Bitrates? Right now I'm thinking
> of 100Mb/s or even only 5Mb/s. It's just for showing the principle so.
> 
> What about analog modulation? Is it possible, once again only for
> educational purposes.
>