Simulation of distortion in multicarrier subcarrier-multiplexed optical communication systems employing direct intensity modulation of semiconductor lasers

Manas K. Haldar; Hari K. Garg; Kim Boon Chia; Frederick V. C. Mendis

doi:10.1117/12.256369

1 November 1996 Simulation of distortion in multicarrier subcarrier-multiplexed optical communication systems employing direct intensity modulation of semiconductor lasers

Manas K. Haldar, Hari K. Garg, Kim Boon Chia, Frederick V. C. Mendis

Author Affiliations +

Proceedings Volume 2919, All-Optical Communication Systems: Architecture, Control, and Network Issues II; (1996) https://doi.org/10.1117/12.256369
Event: Photonics East '96, 1996, Boston, MA, United States

Abstract

Direct intensity modulation of semiconductor lasers in subcarrier multiplexed (SCM) optical fiber communication systems is of interest because of its simplicity and the possibility of integration of the drive electronics with the laser diode. Direct modulation also produces distortion which degrades system performance. In this paper, we extend a static numerical simulation method for multi-carrier SCM systems to a dynamic simulation employing rate equations. We first show that the results of our simulation agree with analytical results for multi-carrier SCM systems obtained from perturbation theory in the absence of optical reflection into the semiconductor laser. We proceed with the calculation of distortion in the presence of weak reflections. We show that the distortion is lower than what is expected from previous analytical considerations for two subcarriers. Our simulation can also take into account the effect of overmodulation in a dynamic manner. However, our simulation does not take into account the distortion due to device imperfections.

Citation Download Citation

Manas K. Haldar, Hari K. Garg, Kim Boon Chia, and Frederick V. C. Mendis "Simulation of distortion in multicarrier subcarrier-multiplexed optical communication systems employing direct intensity modulation of semiconductor lasers", Proc. SPIE 2919, All-Optical Communication Systems: Architecture, Control, and Network Issues II, (1 November 1996); https://doi.org/10.1117/12.256369

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KEYWORDS

Distortion

Semiconductor lasers

Modulation

Optical simulations

Telecommunications

Optical communications

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