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

Volume

22

Issue

7

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

492

Lastpage

494

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);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2041222

Filename

5404799