Performance investigation of hybrid optical amplifiers for high-speed optical networks
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RESEARCH ARTICLE
Performance investigation of hybrid optical amplifiers for high-speed optical networks Amit Wason1
•
Deepak Malik2
Received: 19 November 2018 / Accepted: 13 July 2020 Ó The Optical Society of India 2020
Abstract The development of lightwave systems required large capacity communication networks in today’s hightech era. To fulfill these challenges required proper amplification of the signals. Hybrid optical amplifier made a remarkable change in present optical networks in order to amplify the signals for better performance of a system. In this paper, we have proposed different hybrid optical amplifier configurations [such as semiconductor optical amplifier (SOA)-erbium-doped fiber amplifier (EDFA), EDFA-EDFA, Raman-EDFA] at channel spacing of 0.8 nm for 8 9 10 Gbps for wavelength division multiplexed optical networks. The performance is examined on the basis of quality factor (dB), maximum output power (dBm), minimum bit error rate (BER), and minimum eye closure by varying the transmission distance from 20 to 180 km. It is demonstrated that Raman-EDFA configuration provides better results for the small distances up to 100 km as compared to EDFA-EDFA and SOA-EDFA configurations. The variation in Q factor for Raman-EDFA, EDFA-EDFA, and SOA-EDFA is 33.35–13.56 dB, 32.30–10.95 dB, and 18.52–25.03 dB, respectively. When distance is increased from 100 to 180 km, SOA-EDFA provides better results than Raman-EDFA in terms of BER, but it shows non-uniform gain spectrum.
& Amit Wason [email protected] Deepak Malik [email protected] 1
Ambala College of Engineering and Applied Research, Devsthali, Haryana 133101, India
2
MMEC, MMU, Mullana, Haryana 133203, India
Keywords EDFA Raman amplifier Hybrid amplifier SOA WDM
Introduction The rapid advancement of multimedia services such as audio, video, data, and multichannel communication systems recently has lead to high-capacity optical networks. Wavelength division multiplexed (WDM) is the best solution for increasing the transmission capacity of the system with the increasing number of channels. In WDM, multiple signals of different wavelengths are transmitted over the same channel [1]. For the long-distance transmission, multimedia services required the high-speed data transmission and large bandwidth to grow the networks without repeaters. The above-mentioned requirement can be possible with optical amplifiers. Moreover, such networks are sensitive to fiber nonlinearity, dispersion, and attenuations. The performance of the system can be obtained over large-distance transmissions. Optical amplifiers have a quality to maintain bandwidth and required level of the system. In early days, the regenerators were used, but they required the conversion of signals from one domain to another domain which was quite complex and time-consuming. Regenerators were replaced with the developments of amplifiers as optical amplifiers amplified the optical signals directly without conversing from one domain to another domain. The conventional amplifiers us
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