Novel all-optical quaternary amplitude shift keying modulation technique based on cross-gain modulation in a semiconductor optical amplifier

David Dahan; Uri Mahlab; David Levy

doi:10.1117/1.3139297

1 May 2009 Novel all-optical quaternary amplitude shift keying modulation technique based on cross-gain modulation in a semiconductor optical amplifier

David Dahan, Uri Mahlab, David Levy

Author Affiliations +

Optical Engineering, Vol. 48, Issue 5, 055007 (May 2009). https://doi.org/10.1117/1.3139297

Abstract

We present a novel all-optical quaternary shift keying (4-ASK) modulation technique based on the cross-gain modulation in a semiconductor optical amplifier (SOA) of a modulated probe with moderate extinction ratio. Experimental demonstrations are presented for 20-Gb/s non return to zero (NRZ) and return to zero (RZ) 4-ASK signals with different level distributions and extinction ratios. The dispersion tolerance limitations are investigated. RZ 4-ASK signals show better dispersion robustness (with accumulated dispersion range from -240 to 350 ps/nm) than NRZ 4-ASK signals due to their reduced frequency chirp.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

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David Dahan, Uri Mahlab, and David Levy "Novel all-optical quaternary amplitude shift keying modulation technique based on cross-gain modulation in a semiconductor optical amplifier," Optical Engineering 48(5), 055007 (1 May 2009). https://doi.org/10.1117/1.3139297

Published: 1 May 2009

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