TY - JOUR
T1 - High power ultrafast phase-locked laser at 2060 nm from a doubly resonant optical parametric oscillator
AU - Rao, Han
AU - Mevert, Robin
AU - Geesmann, Fridolin Jakob
AU - Zuber, David
AU - Demircan, Ayhan
AU - Babushkin, Ihar
AU - Morgner, Uwe
N1 - Publisher Copyright:
© 2026. The Author(s).
PY - 2026/2/18
Y1 - 2026/2/18
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=105030741690&partnerID=8YFLogxK
U2 - 10.1038/s41598-026-40002-x
DO - 10.1038/s41598-026-40002-x
M3 - Article
C2 - 41708772
AN - SCOPUS:105030741690
SN - 2045-2322
VL - 16
JO - Scientific reports
JF - Scientific reports
IS - 1
M1 - 7169
ER -