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Novel and simple model of 10-Gb/s electroabsorption modulated lasers and its experimental validation of transmission performance due to overshoot of optical signals
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- Authors
- Yonggyoo Kim, Seungki Nam, Soonkyu Park, Sungwon Lee, Donghoon Jang, H. S. Kang, Jichai Jeong
- Issue Date
- 2003-05
- Citation
- IEEE Photonics Technology Letters, v.15, no.5, pp.643-645
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We have experimentally and theoretically investigated the transmission performance of 10-Gb/s electroabsorption modulated lasers (EMLs) due to the overshoot of optical pulses. When a highly negative bias voltage is applied to EMLs, the overshoot becomes larger due to nonlinear transfer curves of EMLs. In order to further understand the overshoot effect of optical pulses from EMLs on transmission performance, we propose a novel and simple EML model based on the frequency response (magnitude and phase) and the transfer curves (P-V and 慣-V) of EMLs. Although the model does not solve the rate equations and the wave equations, it can accurately predict output pulse shapes and the frequency chirp as well as the transmission performance with reducing simulation time. Using the EML model, we can calculate the overshoot and dispersion power penalty due to modulation bandwidth and group delay difference in 10-Gb/s EMLs. Our results suggest that the overshoot should be considered to accurately predict the transmission performance of 10-Gb/s EMLs.
- KSP Keywords
- Dispersion power penalty, Frequency response(FreRes), Group delay difference, Magnitude and phase, Modulation bandwidth, Negative bias voltage, Optical pulse, Overshoot effect, Pulse shape, Rate equations, experimental validation