Low-chirp highly linear 1.55 mu m strained-layer MQW DFB lasers for optical analog TV distribution systems

• Published in: IEEE journal of quantum electronics 1993-06, Vol.29 (6), p.1782-1791
• Main Authors: Haisch, H., Cebulla, U., Zielinski, E., Bouayad-Amine, J., Klenk, M., Laube, G., Mayer, H.-P., Weinmann, R., Speier, P.
• Format: Article
• Language: English
• Subjects: Applied sciences; Broadcasting. Videocommunications. Audiovisual; Chirp; Dispersion; Exact sciences and technology; Fiber lasers; Gratings; Laser modes; Optical design; Quantum well devices; Quantum well lasers; Stimulated emission; Telecommunications; Telecommunications and information theory; Videocommunications (networks and services)
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.234434

The design and realization of highly linear 1.5- mu m distributed-feedback (DFB) lasers for optical analog TV distribution systems based on dispersive single-mode fibers are reported. A simple and comprehensive model relating grating characteristics to laser chirp was developed and used for optimization of the DFB grating. The model predicts that lasers emitting at wavelengths located in the positive slope sections of the DFB-reflectivity-wavelength characteristic have higher resonance frequencies and reduced chirp. The lasers were realized by using strained-layer multiple quantum wells for high differential gain and low alpha factor, antireflection (AR) coating of one laser facet for reduction of internal photon density, and a special grating design for low spatial hole burning and chirp reduction.< >