Beam quality and efficiency of ns-pulsed high-power mid-IR ZGP OPOs compared in linear and non-planar ring resonators | Zendy

Manuel A. Medina | Zendy; M. Piotrowski | Zendy; Martin Schellhorn | Zendy; Frank R. Wagner | Zendy; A. Berrou | Zendy; Anne Hildenbrand-Dhollande | Zendy

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Beam quality and efficiency of ns-pulsed high-power mid-IR ZGP OPOs compared in linear and non-planar ring resonators

Author(s) -

Manuel A. Medina,

M. Piotrowski,

Martin Schellhorn,

Frank R. Wagner,

A. Berrou,

Anne Hildenbrand-Dhollande

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.430717

Subject(s) - opos , optics , resonator , planar , laser beam quality , materials science , beam (structure) , power (physics) , quality (philosophy) , physics , optoelectronics , laser , optical parametric oscillator , laser beams , computer graphics (images) , quantum mechanics , computer science

We compare the performance of ns-pulsed mid-infrared optical parametric oscillators (OPOs) based on ZGP crystals in a simple linear cavity and two non-planar image-rotating resonators. Our 2 μm pump source is a 68 W 10 kHz diffraction limited Ho:LLF MOPA system. In a linear cavity, it allows us to generate up to 38 W of the total average power with M 2 <2.2 from the ZGP OPO in the 3-5 μm range. Beam quality and stability are significantly improved in both types of non-planar ring resonators (M 2 <1.8 in RISTRA and M 2 <1.4 in FIRE), while the total average power is above 21 W. Factors influencing the beam quality such as average power and pump repetition rate are studied in detail.

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