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Effect of line coding on heterodyne FSK optical systems with nonuniform laser FM response

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3 Author(s)
S. P. Majumder ; Dept. of Electr. & Electron. Eng., Univ. of Eng. & Technol., Dhaka, Bangladesh ; R. Gangopadhyay ; G. Prati

A simple analytical approach for evaluating the system performance due to the combined effects of receiver noise, laser phase noise and laser nonuniform FM response in wide-deviation heterodyne optical FSK system with envelope detection is presented. With this approach, the relative effectiveness of several linecoding schemes, namely alternate mark inversion (AMI), Manchester coding (MC) and delay modulation (DM), in counteracting the pattern-dependent performance degradation due to nonflat FM response has been quantitatively assessed. Theoretical results and simulations show that performance of linecoded systems are within 0.7 dB at bit error probability of 10-9 from the random NRZ-FSK system with flat FM response

Published in:

IEE Proceedings - Optoelectronics  (Volume:141 ,  Issue: 3 )