An optoelectronic transceiver is provided that includes a laser driver in communication
with an optical transmitter. The laser driver includes an operational amplifier
having three stages and connected with an optical transmitter. The first stage
includes a differential amplifier that receives a reference voltage input, corresponding
to a desired magnitude of the optical transmitter voltage, and an optical transmitter
voltage input, representing an optical output strength of the optical transmitter,
and having transconductance that increases exponentially as a difference between
the reference voltage and the optical transmitter voltage increases. The differential
amplifier generates an output current based on the inputs. The second stage integrates
the output current to generate a first output voltage. Finally, the third stage
is configured to receive as input the first output voltage to generate a second
output voltage approximately equal to the first output voltage, the second output
voltage controlling an optical transmitter bias current.