Nonlinear mode coupling in a CW operating Ti: Sapphire laser oscillator

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

Cataluna, MA (Autor) Outra; Crespo, H (Autor) FCUP; Guerreiro, A (Autor) FCUP; Mendonca, JT (Autor) Outra

Revista

Título: Physica Scripta

Vol. T98

Páginas: 134-136

ISSN: 0031-8949

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 1 Citação

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-RRH

DOI: 10.1238/physica.topical.098a00134

Abstract (EN): We experimentally observe a high-contrast intensity modulation in the multimode CW output of a Titanium:Sapphire laser, This modulation has a very low frequency (in the hundreds of Hz range), being stable and self-sustaining, unlike previously reported regimes which require external perturbations such as a periodic change in the resonant cavity length. This effect results from the nonlinear coupling of several longitudinal modes with very large frequency spacing (of the order of tens of THz) which arise due to mode competition violation (promoted by dispersion control within the laser cavity), associated with the large gain bandwidth of Ti:Sapphire, To our knowledge, this is a previously unreported phenomenon. for which we are currently developing an adequate theoretical model. These results may prove useful in the further understanding of the onset of mode-locked operation in ultrashort lasers and other highly nonlinear systems.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3