Second harmonic generation and beam cleaning in optically poled multimode graded-index fibers
- Ceoldo, Davide
- KRUPA, Katarzyna
- Tonello, Alessandro
- Couderc, Vincent
- MODOTTO, Daniele
- MINONI, Umberto
- Millot, Guy
- WABNITZ, Stefan
Publication date
January 2017
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
Recent experimental results have confirmed that nonlinear effects in multimode graded-index (MM-GRIN) fibers lead to a wealth of observable spatiotemporal effects. In spite of the large number of modes supported by the fiber, by increasing the input power the transverse profile evolves in a clean bell-shaped beam [1, 2]. Next, the input laser line experiences a strong spectral broadening and Geometric Parametric Instability (GPl) peaks are observed [3]
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