High-power, femtosecond, thermal-lens-shaped Yb:KGW oscillator.
Thermal lens shaping for astigmatism compensation is extended to a high-power, diode-pumped, Yb:KGW laser by employing a gain crystal geometry designed for efficient polarized pumping. The 63MHz oscillator is soliton mode-locked with the aid of a saturable Bragg reflector to yield 250fs (347fs) pulses at an output power of 3.5W (5W). Frequency doubling of the 250fs pulses with an intrinsic efficiency >60% provides 1.65W of average green power.
Department of Physics (m/c 273), University of Illinois at Chicago, 845 W. Taylor Street (rm. 2236), Chicago, IL 60607-7059, USA. jberge2@uic.edu
Joel A
JA
Berger
Michael J
MJ
Greco
W Andreas
WA
Schroeder
D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006358:Hot Temperature; D007834:Lasers; D007909:Lenses; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation*; D012542:Scattering, Radiation