Influence of gain nonlinearity on the second order harmonic distortion in semiconductor lasers
2003 (English)In: Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. 5th International Workshop on, 2003, 236-238 p.Conference paper (Refereed)
The semiconductor laser is commonly used as a light source in fiber-optical telecommunication systems. In order to be able to send as much information as possible in a short time, it is important that the laser has a large modulation bandwidth, i.e., the turn-on and turn-off time should be as short as possible. In analogue fiber optic systems for transmission of radio or television signals, it is also important that the light from the laser increases linearly with driving current. Otherwise, the transmitted signal will become distorted. The modulation bandwidth and the modulation distortion are dependent both on the laser structure and the gain characteristics of the active material. In order to develop a correct laser model for calculation of, e.g., distortion one need an accurate model of the dependence of gain on carrier and photon density. We show that different gain models, fitted to give exactly the same modulation response can have significantly different distortion behavior.
Place, publisher, year, edition, pages
2003. 236-238 p.
carrier density; fiber-optical telecommunication systems; gain characteristics; gain models; gain nonlinearity; laser model; laser structure; modulation bandwidth; modulation distortion; photon density; radio signal transmission; second order harmonic distortion; semiconductor lasers; television signal transmission; carrier density; gain control; harmonic distortion; optical distortion; optical fibre communication; optical modulation; semiconductor lasers;
Telecommunications Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-89343DOI: 10.1109/LFNM.2003.1246136OAI: oai:DiVA.org:kth-89343DiVA: diva2:502910
International Workshop on Laser and Fiber-Optical Networks Modeling
NR 201408052012-02-142012-02-142012-02-14Bibliographically approved