Lightwave Logic Inc (LWLG)

[prototype_101]

As modulation speeds go up,
typically the voltage required by
the optical transmitter increases but
the voltage available from the driver
decreases. Electro-optic polymers
have excellent velocity phase matching
between optical and microwave
propagation speed which results in
unmatched speed. They also have
high electro-optic response which
results in lower drive voltage. For
example, Lightwave Logic’s modulator
roadmap starts with 50GHz modulators
which is already faster than the~35
GHz used in the newest 100G and
400G Ethernet formats and coherent
DWDM modulation schemes. 100 GHz
modulators with 2 V drive have been
demonstrated.

In response to limited component
speeds, the industry has been forced
to use complex modulations schemes
such as PAM4. PAM4 encoding cuts the
usable signal to a third of its original size
which stretches them out to twice the
time i.e. half the speed, and exacerbates
the link budget problems. At a minimum,
polymer photonics’ higher speed can
improve the quality of today’s PAM4
signals and lower power consumption.
Alternatively, they could enable the
use of simpler NRZ modulation to get
the same data rates, taking back that
factor of three (5 dB) in link budget.
Alternatively, they could extend the
roadmaps to greater speeds and open
up new design possibilities.

https://lightwavelogic.com/Profiles/Investor/Investor.asp?BzID=2252&from=du&ID=70084&myID=16524&L=I&Validate=4