A Performance Enhancement and High Speed Spectrum Sliced Free Space Optical System
- 2 Downloads
A cost effective Kerr nonlinearity based spectrum sliced (SS) WDM free space optical communication system is demonstrated under different weather instabilities. The investigated supercontinuum spectrum sliced WDM FSO system is evaluated at 2.5 Gbps up to 5 km of link distance. A highly nonlinear fiber is a channel for the generation of high power broad spectrum for spectrum slicing. A dense SS-WDM is investigated at 75 GHz channel spacing among 4 channels to make system bandwidth efficient. The system is investigated for different line coding (return to zero, non return to zero) and advanced modulation format such as compressed spectrum return to zero. A major degrading factor in free space communication i.e. beam divergence is also analyzed for investigated work. Antenna diameters of receiver and transmitter play a vital role in FSO, thus various diameters performances are also studied. The approach is to cater the high-speed data demands and thus system deliberated and demonstrated from 2.5 to 10 Gbps. To strengthen the signal in this FSO system, three optical amplifiers are scrutinized such as erbium doped fiber amplifier (EDFA), semiconductor optical amplifier (SOA) and Raman amplifier in terms of bit error rate and quality factor. Results revealed that EDFA is the best amplifier in investigated SS-WDM-FSO system.
KeywordsFree space optics (FSO) Wavelength division multiplexing (WDM) Highly nonlinear fiber (HNLF) Spectrum sliced (SS) Super continuum (SC) Return to zero (RZ) Non-return to zero (NRZ) Carrier suppressed return to zero (CSRZ) Semiconductor optical amplifier (SOA) Erbium doped fiber amplifier (EDFA) Signal to noise ratio (SNR) Bit error rate (BER) Quality factor (Q)
- 1.Bouchet, O., Sizun, H., Boisrobert, C., de Fornel, F., and Favennec, P. N. (2010). Free space optics: Propagation and communication (pp. 1–219), Wiley—ISTE. ISBN: 978-0-470-39441-0.Google Scholar
- 4.Kazaura, K., Omae, K., Suzuki, T., et al. (2006). Experimental demonstration of next-generation FSO communication system. Optics East. Int’1. Society of Photo Optical Instrumentation Engineers (SPIE), 6390, 63900–63912.Google Scholar
- 9.Gupta, A., Bakshi, S., & Nagpal, S. (2017). Digital signal processing of 400 Gbps CO-QPSK-WDM system over optical wireless channel for carrier phase estimation. Springer—Wireless Personal Communications. https://doi.org/10.1007/s11277-017-5042-1.
- 16.Koshy, A. S., & Babu, J. S. (2016). Impact of erbium doped fiber amplifier on WDM-FSO system under rain attenuations. International Journal of Advanced Research in Electrical Electronics and Instrumentation Engineering, 5, 867–872.Google Scholar
- 18.Abtahi, M., & Rusch, L. A. (2017). Mitigating of scintillation noise in FSO communication links using saturated optical amplifiers. In Centre for Optics, Photonic and Laser (COPL) (pp. 3181–3185).Google Scholar
- 19.Thakur, A., & Nagpal, S. (2017). Performance evaluation of different optical amplifiers in spectrum sliced free space optical link. De–Gruyter, Journal of Optical Communications (JOC), JOC.2017.0120.Google Scholar
- 21.Kim, I. I., McArthur, B., & Korevaar, E. J. (2000). Comparison of laser beam propagation at 785 nm and 1550 nm in fog and haze for optical wireless communications. Optical Wireless Communication III, Society of Photo Optical Instrumentation Engineers (SPIC), 4214, 26–37.Google Scholar