Kanat M.  Abdul Hussain, 
    Design and Implementation of a Driving Circuit for an
Optical System Transmitter and Receiver,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 18,
    2019,
    Pages 6906-6911,
    ISSN 1816-949x,
    jeasci.2019.6906.6911,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.6906.6911)
    Abstract: For the laser driver circuit driving a laser diode to generate an optical output corresponding to an
input data, thus, controlling the optical output based on an output current from a photodiode that detects the
optical output. The output current is converted into a voltage signal whose amplitude is detected after filtering
the voltage signal by a low-pass filter. Therefore, a reference signal corresponding to the input data is generated
and its amplitude is detected. We have a modulator for generating a modulation current, it regulates the
amplitude of the modulation current, according to the difference between the two detected amplitudes.
    Keywords: voltage signal;amplitude;optical output;detected;Corresponding;modulation