16 April 2008 Continuous-wave and mode-locked operation of diode-pumped Yb:NaY(WO4)2
Author Affiliations +
We studied diode pumping of the locally disordered Yb-doped NaY(WO4)2 crystal. An a-cut 1.514-mm thick sample (6.9 at % Yb doping or 4.52×1020 cm-3) was placed under Brewster angle in a z-shaped astigmatically compensated cavity, without any active cooling. It was oriented for pumping and emission in π-polarization (E//c). Laser experiments were performed applying a high brightness laser diode as a pump source. The laser diode delivered up to 2.1 W of input power and the emission wavelength was selected in the broad absorption peak of Yb:NaY(WO4)2 around 961nm. Continuous-wave operation in the 1-μm range was obtained for output coupler transmission between 1% and 10%. A maximum output power of ≈180 mW and slope efficiencies up to 30%, related to the absorbed power, were achieved. For femtosecond mode-locked operation, a semiconductor saturable absorber mirror as well as two SF10 prisms were included in the cavity. Aligning the cavity for shortest pulses, we obtained stable passive mode-locking with pulse durations as short as 97 fs directly from the oscillator. Applying external compression, the pulse duration could be further reduced to 90 fs with a corresponding time-bandwidth-product of 0.321. The average output power amounted to 59 mW at a repetition rate of 90 MHz and the corresponding output spectrum was centered at 1044 nm.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andreas Schmidt, Andreas Schmidt, Simon Rivier, Simon Rivier, Valentin Petrov, Valentin Petrov, Uwe Griebner, Uwe Griebner, Alberto García-Cortés, Alberto García-Cortés, María-Dolores Serrano, María-Dolores Serrano, Concepción Cascales, Concepción Cascales, Carlos Zaldo, Carlos Zaldo, } "Continuous-wave and mode-locked operation of diode-pumped Yb:NaY(WO4)2", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69980X (16 April 2008); doi: 10.1117/12.780584; https://doi.org/10.1117/12.780584


Back to Top