Title :
Regenerative Amplification by Using Self-Phase Modulation in a Quantum-Dot SOA
Author :
Contestabile, G. ; Maruta, A. ; Sekiguchi, S. ; Morito, K. ; Sugawara, M. ; Kitayama, K.
Author_Institution :
Scuola Superiore Sant´´Anna, Pisa, Italy
fDate :
4/1/2010 12:00:00 AM
Abstract :
We experimentally demonstrate regenerative amplification of 10-, 20-, and 40-Gb/s return-to-zero signals exploiting a simple scheme based on self-phase modulation (SPM) in a columnar quantum-dot (CQD) semiconductor optical amplifier (SOA) and the use of a red-shifted off-set filter. We study the signal Q 2-factor improvement as a function of the input power to the amplifier. We also report results using a quantum-well (QW) SOA for comparison. We find that the SPM-based regenerative amplification is only possible in the quantum-dot amplifier.
Keywords :
III-V semiconductors; amplification; gallium arsenide; gallium compounds; indium compounds; optical filters; optical pulse generation; quantum dot lasers; quantum well lasers; self-phase modulation; semiconductor optical amplifiers; InAs-InGaAsP; bit rate 10 Gbit/s; bit rate 20 Gbit/s; bit rate 40 Gbit/s; columnar quantum-dot SOA; quantum-dot amplifier; quantum-well SOA; red-shifted off-set filter; regenerative amplification; return-to-zero signals; self-phase modulation; semiconductor optical amplifier; signal Q2 -factor; All-optical regeneration; quantum dot (QD); self-phase modulation (SPM); semiconductor optical amplifier (SOA);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2041222
