High power ultrafast phase-locked laser at 2060 nm from a doubly resonant optical parametric oscillator

Verfasst von

Han Rao, Robin Mevert, Fridolin Jakob Geesmann, David Zuber, Ayhan Demircan, Ihar Babushkin, Uwe Morgner

Abstract

A high-power 2-μm phase-locked femtosecond source is demonstrated by a degenerate doubly resonant optical parametric oscillator (DROPO), which is synchronously pumped by a home-built Yb:YAG Kerr-lens mode-locked thin-disk laser. A dither-free scheme, incorporating an intracavity 'parasitic' sum-frequency of signal and pump as an error signal, has been used to stabilize the DROPO at degeneracy. To our knowledge, with a pump power of 15.8 W, this system achieves the highest output power (5.6 W) and conversion efficiency (35 %) for an actively stabilized, degenerate BBO-based DROPO operating at 2 μm. The long-term stability measurement of the power over 90 minutes shows a root mean square (RMS) power noise of 0.78%, demonstrating excellent stability and reliable performance.

Details

Organisationseinheit(en): Institut für Quantenoptik
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Externe Organisation(en): Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI)
Typ: Artikel
Journal: Scientific reports
Band: 16
ISSN: 2045-2322
Publikationsdatum: 18.02.2026
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemein
Elektronische Version(en): https://doi.org/10.1038/s41598-026-40002-x (Zugang: Offen )