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Regenerative Amplification by using Self Phase Modulation in a Quantum Dot SOA

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<li>Title : 

Regenerative Amplification by using Self Phase Modulation in a Quantum Dot SOA

<li>Author : 

G. Contestabile, A. Maruta, S. Sekiguchi, K. Morito, M. Sugawara, and K. Kitayama

<li>Journal : 

to appear in IEEE Photonic Technol. Lett.

<li>Abstract: We experimentally demonstrate regenerative amplification of 10, 20, and 40 Gb/s return-to-zero (RZ) signals exploiting a simple scheme based on self phase modulation (SPM) in a columnar quantum dot semiconductor optical amplifier (CQD-SOA) and the use of a red-shifted off-set filter. We study the signal Q2 factor improvement as a function of the input power to the amplifier and also report for comparison similar measurements using a quantum well SOA. We find that the SPM-based regenerative amplification is only possible in the quantum dot amplifier. 


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