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Article Dans Une Revue Optics Letters Année : 2017

Linewidth enhancement factor measurement based on FM-modulated optical injection: application to rare-earth-doped active medium

Résumé

A new method for measuring the linewidth enhancement factor of a laser is proposed. It is based on frequency-modulated optical injection, combined with dual-frequency laser operation. The linewidth enhancement factor α is deduced from the experimental data using a theoretical analysis based on a standard rate equation model. As the intracavity power is kept constant, the method allows to free the process from the thermal effects that are usually present in AM/FM techniques. Measurement of α = 0.28 ± 0.04 in a diode-pumped Nd:YAG laser demonstrates that the method is well-suited for characterizing small values of α.
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Dates et versions

hal-01501412 , version 1 (04-01-2019)

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Aurélien Thorette, Marco Romanelli, Marc Vallet. Linewidth enhancement factor measurement based on FM-modulated optical injection: application to rare-earth-doped active medium. Optics Letters, 2017, 42 (8), pp.1480-1483. ⟨10.1364/OL.42.001480⟩. ⟨hal-01501412⟩
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