Assessment of gain saturation in cascaded semiconductor optical amplifier for high-bit-rate wavelength-division-multiplexing signals over long transmission distance

Surinder Singh

doi:10.1117/1.2891935

1 March 2008 Assessment of gain saturation in cascaded semiconductor optical amplifier for high-bit-rate wavelength-division-multiplexing signals over long transmission distance

Surinder Singh

Author Affiliations +

Optical Engineering, Vol. 47, Issue 3, 035008 (March 2008). https://doi.org/10.1117/1.2891935

Abstract

In this paper, the investigation of 10 channels at 80-Gb/s wavelength-division-multiplexing (WDM) transmission over 910-km single-mode fiber and dispersion compensating fiber using cascaded in-line semiconductor optical amplifiers at a span of 70 km for soliton return zero differential phase-shift keying (RZ-DPSK) modulation format is achieved. With the narrow channel spacing (i.e., 200 GHz), the results of quality is more than 15 dB the received signals after covering 910-km transmission distance without any power drop. The semiconductor optical amplifier (SOA) structure parameters for in-line amplifier is optimized to obtain low cross talk in multichannel WDM systems at nil power penalty with sufficient gain. For the differential gain 200 atto cm² and length 750 mm of SOA has minimum SOA-induced cross talk is observed. The impact of optical power received and the Q factor at different differential gain, carrier lifetime, and length has been illustrated. It is found that for a transmission distance of 700 km, with decrease the channel spacing, there is an increase in cross talk among channels, hence the signal quality continues to decrease. A clear eye diagram and a good optical spectrum are observed at a transmission distance of 910 km in a soliton RZ-DPSK system.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Surinder Singh "Assessment of gain saturation in cascaded semiconductor optical amplifier for high-bit-rate wavelength-division-multiplexing signals over long transmission distance," Optical Engineering 47(3), 035008 (1 March 2008). https://doi.org/10.1117/1.2891935

Published: 1 March 2008

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