1. Spence, D. E., Kean, P. N. & Sibbett, W. 60-fsec pulse generation from a self-mode-locked Ti:sapphire laser. Opt. Lett. 16, 42–44 (1991).
2. Femtosecond Technology: From Basic Research to Application Technology (eds Kamiya, T., Saito, F., Wada, O. & Yajima, H.) Part III, 59–174 (Springer, Berlin, 1999).
3. Vasil'ev, P. Ultrafast Diode Lasers: Fundamentals and Applications Ch. 4, 95–150 (Artech House, Boston, 1995).
4. Avrutin, E. A., Marsh, J. H. & Portnoi, E. L. Monolithic and multi-gigahertz mode-locked semiconductor lasers: constructions, experiments, models and applications. IEE Proc. Optoelectron. 147, 251–278 (2000).
5. Dingle, R. & Henry, C. H. Quantum effects in heterostructure lasers. US Patent 3,982,207 (1976).