PENGEMBANGAN MODUL PRAKTIKUM UNTUK PERBANDINGAN UNJUK KERJA SUMBER CAHAYA OPTIK LED DAN LASER DALAM SISTEM KOMUNIKASI OPTIK

Abstract

LED optical light source and laser diode function as an information carriers in the optical
communication systems. Each optical light source in the form of LED, CW Laser, and VCSEL Laser
has advantages and disadvantages. Based on these advantages and disadvantages, a study was
carried out on the internal and external characteristics of optical light sources to determine the optimal
optical light source to use as needed. Simulations are carried out in optical system software. The
performance analyzed is Q-Factor, BER, and Eye Diagram until it reaches the ITU-T G.984.2
standard with a minimum limit of Q-Factor = 6 and BER = 10-9. The feasibility test of the practicum
module uses the method of filling out a questionnaire with a Likert scale of 1–5 and giving pre and
post-test to the practitioner. The results of this study were an increase in the internal characteristics of
the LED, a decrease in the signal power of the CW Laser, and an increase in the bias current of the
VCSEL Laser resulting in a decrease in Q-Factor, and an increase in the BER value. The comparison
of the increase in bit rate and transmission distance showed that CW Laser can transmit a higher bit
rate and a longer transmission distance. The comparison of the transmission distance that can be
covered by each optical light source shows that the CW Laser travels the farthest transmission
distance . Increased understanding of the practitioner based on the post-test score which is higher
than the pre-test score can be used as the basis that this practicum module as a whole is very
suitable for use as teaching material. This is also supported by the feasibility test of the questionnaire
filling method with a Likert scale of 1-5 with a percentage of the practitioner's assessment of 88.6%.