Ultra-low intensity noise, all fiber 365 W linearly polarized single frequency laser at 1064 nm

Clément Dixneuf (1, 2) , Germain Guiraud (3) , Yves-Vincent Bardin (2) , Quentin Rosa , Mathieu Goeppner , Adèle Hilico (1) , Christophe Pierre (4) , Johan Boullet (4) , Nicholas Traynor (2) , Giorgio Santarelli (1)

1 LP2N - Laboratoire Photonique, Numérique et Nanosciences
2 Azur Light Systems
3 Azur Light Systems
4 ALPhANOV

We demonstrate a robust linearly polarized 365 W, very low amplitude noise, single frequency master oscillator power amplifier at 1064 nm. Power scaling was done through a custom large mode area fiber with a mode field diameter of 30 µm. No evidence of stimulated Brillouin scattering or modal instabilities are observed. The relative intensity noise is reduced down to −160 dBc/Hz between 2 kHz and 10 kHz via a wide band servo loop (1 MHz bandwidth). We achieve 350 W of isolated power, with a power stability < 0.7% RMS over 1100 hours of continuous operation and a near diffraction limited beam (M 2 < 1.1).

Domaines: Optique / photonique

Clément Dixneuf, Germain Guiraud, Yves-Vincent Bardin, Quentin Rosa, Mathieu Goeppner, et al.. Ultra-low intensity noise, all fiber 365 W linearly polarized single frequency laser at 1064 nm. Optics Express, 2020, 28, ⟨10.1364/OE.385095⟩. ⟨hal-02536817⟩