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Proceedings Paper

Studies of different modulation techniques in the integration of SCM optical communication system
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Paper Abstract

Studies considering different modulation techniques used in the integration of subcarrier multiplexing (SCM) optical transmission systems are presented in this paper. The analysis of SCM systems operating in the 1550 nm signal wavelength range involves ASK, QPSK, 16QAM and 64QAM electrical modulations. From experimental results and by numerical simulation, the frequency response of the fibre for the ODSB and OSSB systems is obtained. The simulated results suggest that using dispersion compensating fibre (DCF) it is possible to compensate the dispersive effect in optical fibre for ODSB signals, allowing the system to get OSSB similar frequency response. SCM systems simulations were performed using the commercial software Optisystems from Optiwave, Inc. The system bandwidth increase was analysed in terms of fibre length and dispersion considering different links, subcarrier spacing and number of subcarriers. From experimental results, the intermodulation effect, generated by the optical fibre, is verified and indicated the necessity of using unequal spacing between the subcarriers, which is a factor that limits the SCM systems' performance.

Paper Details

Date Published: 1 May 2008
PDF: 11 pages
Proc. SPIE 6996, Silicon Photonics and Photonic Integrated Circuits, 69961W (1 May 2008); doi: 10.1117/12.781500
Show Author Affiliations
Diogo Vieira Nogueira Coelho, Instituto Militar de Engenharia (Brazil)
Maria Thereza Miranda Rocco Giraldi, Instituto Militar de Engenharia (Brazil)
Daniel J. C. Coura, Federal Univ. of Espírito Santo (Brazil)
Marcelo Eduardo Vieira Segatto, Federal Univ. of Espírito Santo (Brazil)
Maria José Pontes, Federal Univ. of Espírito Santo (Brazil)
João Crisóstomo Weyl Albuquerque Costa, Univ. Federal do Pará (Brazil)


Published in SPIE Proceedings Vol. 6996:
Silicon Photonics and Photonic Integrated Circuits
Giancarlo C. Righini; Seppo K. Honkanen; Lorenzo Pavesi; Laurent Vivien, Editor(s)

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