Mirrorless backward-wave optical parametric oscillator: a unique approach for laser frequency down-shifting with preserved spectral features

A. Zheng; K. M. Mølster; X. Délen; P. Mutter; J.-B. Dherbecourt; J.-M. Melkonian; A. Zukauskas; F. Laurell; P. Georges; M. Raybaut; V. Pasiskevicius; A. Godard

doi:10.1117/12.3001671

13 March 2024 Mirrorless backward-wave optical parametric oscillator: a unique approach for laser frequency down-shifting with preserved spectral features

A. Zheng, K. M. Mølster, X. Délen, P. Mutter, J.-B. Dherbecourt, J.-M. Melkonian, A. Zukauskas, F. Laurell, P. Georges, M. Raybaut, V. Pasiskevicius, A. Godard

Author Affiliations +

Proceedings Volume PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; PC1286905 (2024) https://doi.org/10.1117/12.3001671
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We present our last numerical and experimental results on a mid-infrared source based on a tunable Yb-based hybrid MOPA pump and a Backward Wave Optical Parametric Oscillators (BWOPO). The BWOPO has a record-low oscillation threshold of 19.2 MW/cm² and generates mJ-level output with an overall conversion efficiency exceeding 70%. The BWOPO acts a frequency shifter of the pump radiation toward the forward wave, maintaining the pump spectral properties. The demonstrated tuning range of 10 GHz is already compliant for DIAL applications. We have also developed advanced numerical modelling of the BWOPO taking into account spectral and, for the first time, spatial beam profiles.

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A. Zheng, K. M. Mølster, X. Délen, P. Mutter, J.-B. Dherbecourt, J.-M. Melkonian, A. Zukauskas, F. Laurell, P. Georges, M. Raybaut, V. Pasiskevicius, and A. Godard "Mirrorless backward-wave optical parametric oscillator: a unique approach for laser frequency down-shifting with preserved spectral features", Proc. SPIE PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, PC1286905 (13 March 2024); https://doi.org/10.1117/12.3001671

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KEYWORDS

Laser frequency

Optical parametric oscillators

Laser radiation

Laser applications

LIDAR

Mid-IR

Numerical modeling

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