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Article Dans Une Revue Optics Letters Année : 2015

Spectrotemporal dynamics of a picosecond OPO based on chirped quasi-phase-matching

Résumé

We report on the first experimental investigation of the spectral dynamics of a synchronously pumped optical parametric oscillator (OPO) by use of dispersive Fourier transformation. For standard pumping rates, we observe a reproducible steady-state pulse-to-pulse spectrum. However, at high pumping levels, the OPO delivers pulse trains with nontrivial oscillatory spectral patterns. So as to benefit from a tailored broadband gain spectrum, the investigated OPO contains a chirped quasi-phase matching (QPM) nonlinear crystal. We explore the specific impacts of using such a remarkable parametric amplification medium where nonlinearly coupled frequencies vary with position. Depending on the QPM chirp rate sign, a red- or blue-shift of the emitted wavelength occurs when the OPO is switched on, leading to different spectral steady-states. These singular spectrotemporal dynamics are evidenced and explained for the first time.
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Dates et versions

hal-01225651 , version 1 (16-07-2021)

Identifiants

Citer

D. Descloux, C. Laporte, J.B. Dherbecourt, J.M. Melkonian, M. Raybaut, et al.. Spectrotemporal dynamics of a picosecond OPO based on chirped quasi-phase-matching. Optics Letters, 2015, 40 (2), pp.280-283. ⟨10.1364/OL.40.000280⟩. ⟨hal-01225651⟩
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