> Looking at EDFA options... they are all ~1500nm as far as I can tell. Is
there a specific model you are talking about?
Yeah, that is a consequence of how the EDFA technology works. It really
only works in the C-band and sometimes the L-band, depending on how it's
manufactured. If you contact one
> Are you saying we could use normal QSFP28 LR4 or ER4 modules with an
amplifier in between?
Yes, that is the idea from 30,000 ft. Fun fact, the ER4 optics you mention
are amplified inside the pluggable in a very similar manner to how these
EDFA systems work.
Basically: QSFP28 100G ER <-> EDFA Amp
Look into EDFA amplifier systems. They work over a range of bands and are
pretty affordable.
They can carry regular 1310nm as well as C-Band. Although if you are
carrying C-band you may have to compensate for chromatic dispersion.
Happy to help, I love this stuff!
On Fri, Sep 24, 2021 at 4:39 PM
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