High-power all-fiber ultra-low noise laser

Jian Zhao (1) , Germain Guiraud (2) , Christophe Pierre (3) , Florian Floissat (1) , Alexis Casanova (4) , Ali Hreibi (5) , Walid Chaibi (5) , Nicholas Traynor (6) , Johan Boullet (3) , Giorgio Santarelli (1)

1 LP2N - Laboratoire Photonique, Numérique et Nanosciences
2 Azur Light Systems.
3 ALPhANOV
4 Amplitude Systèmes
5 ARTEMIS - Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux
6 Azur Light Systems

High-power ultra-low noise single-mode single-frequency lasers are in great demand for interferometric metrology. Robust, compact all-fiber lasers represent one of the most promising technologies to replace the current laser sources in use based on injection-locked ring resonators or multi-stage solid-state amplifiers. Here, a linearly-polarized high-power ultra-low noise all-fiber laser is demonstrated at a power level of 100 W. Special care has been taken in the study of relative intensity noise (RIN) and its reduction. Using an optimized servo actuator to directly control the driving current of the pump laser diode (LD), we obtain a large feedback bandwidth of up to 1.3 MHz. The RIN reaches-160 dBc/Hz between 3 kHz and 20 kHz.

Mots clés: single-frequency laser; intensity noise; feedback bandwidth; High power fiber laser

Domaines: Optique [physics.optics]; Instrumentations et Détecteurs [physics.ins-det]

Jian Zhao, Germain Guiraud, Christophe Pierre, Florian Floissat, Alexis Casanova, et al.. High-power all-fiber ultra-low noise laser. Applied Physics B - Laser and Optics, 2018, 124, ⟨10.1007/s00340-018-6989-7⟩. ⟨hal-01796760⟩