The Future Electrical Multiplexing Technique for High Speed Optical Fibre

Abstract

Advancement in transmission technology based on fiber optic such as multiplexing technique is an attractive research area for future development of high capacity and high speed optical communication system. Typical electrical based multiplexing such as electrical time division multiplexing (ETDM) and duty cycle division multiplexing (DCDM) have difficulty to fulfil the requirements of modern fiber optic communication with practical solution. Multi slot amplitude coding (MSAC) is the latest multiplexing technique that has been proposed as an alternative to ETDM and DCDM. The results show that the spectral width is reduced by around 25%, not less than 55% improvement of chromatic dispersion (CD) tolerance, 0.6 dB better receiver sensitivity, and 1.5 dB better optical signal to noise ratio (OSNR) compared to DCDM for 30 Gbit/s transmission capacity. The spectral width for 3 × 10 Gbit/s, 4 × 10 Gbit/s and 5 × 10 Gbit/s MSAC is 60 GHz, which indicates improvement of spectral efficiency. This advantage is not possible to be achieved through ETDM technique. In addition, 10 GHz clock signal can be extracted from the MSAC signal which is important for recovery circuit at receiver since it is similar to symbol rate.

June 2021

“…work on transmission technology via fiber optics especially is an area where future developments are looking good. Commonplace electrical-based multiplexing, for aexamplea, electrical timedivision multiplexinga and cyclea division amultiplexing seem to fail to satisfy the aprerequisites of current/modern afiber-optica communication [10]. Multi aslot aamplitude coding is the most recent multiplexing procedures, which is proposed as an option in contrast to regular ETDM and DCDM.…”

“…Multi aslot aamplitude coding is the most recent multiplexing procedures, which is proposed as an option in contrast to regular ETDM and DCDM. In addition to that, improvements in spectral efficiency which lie outside the capability of ETDM have been consistently demonstrated and pier-reviewed in [10]. MSAC signal additionally takes into account extraction of 10ghz clock signal which is…”