SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 7: Poster I
Q 7.2: Poster
Montag, 6. März 2023, 16:30–19:00, Empore Lichthof
5 W high power femtosecond laser at 2060 nm from a stabilized doubly resonant optical parametric oscillator — •han rao1,2, Christian markus dietrich1,2, José ricardo cardoso de andrade3, robin mevert1,2, fridolin jakob geesmann1, ayhan demicran1,2, ihar babushkin1,2,3, and uwe morgner1,2 — 1Leibniz University Hannover, Institute of Quantum Optics, Hannover, Germany — 2Cluster of Excellence PhoenixD, Hannover, Germany — 3Max Born Institute, Berlin, Germany
A high power 2 μm femtosecond laser 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, emitting pulses at wavelength of 1030 nm with a pulse duration of 270 fs, 25 W output power and 32.5 MHz repetition rate. By using a dither-free scheme which utilizes a "parasitic" sum-frequency generation (SFG) of the signal and pump intracavity as error signal, we stabilize our degenerate DROPO. A stable output power of 4.9 W at degeneracy is observed with a pump power of 18.7 W, which results in a conversion efficiency of 26%. The long-term stability measurement of the power over 40 minutes showed a root mean square (RMS) power noise of 1.1%.