Noise performance of high-speed radio over fiber links employing vertical-cavity surface-emitting lasers

Autor: Moustafa Ahmed, Ahmed Bakry, Safwat W. Z. Mahmoud
Rok vydání: 2015
Předmět:
Zdroj: Journal of Modern Optics. 62:712-721
ISSN: 1362-3044
0950-0340
DOI: 10.1080/09500340.2014.1003258
Popis: This study investigates the intensity noise in high-speed vertical-cavity surface-emitting lasers (VCSELs) and its contribution to the noise performance of radio over fiber (RoF) links. We evaluate the sinusoidal modulation of VCSELs in terms of the second-order harmonic distortion (2HD) and third-order intermodulation distortion (IMD3) in additions to the relative intensity noise (RIN). The spurious-free dynamic range of the proposed VCSEL is estimated. The noise performance of the RoF link is assessed by the noise figure. The modulation characteristics of the VCSEL and the gain and noise factor (NF) of the fiber link are compared under conventional and high-speed modulations of VCSELs. Also, we present comparison of the NF between short (300 m) and relatively long (2 km) fibers.
Databáze: OpenAIRE