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Proceedings Paper

Continuous-wave and mode-locked operation of diode-pumped Yb:NaY(WO4)2
Author(s): Andreas Schmidt; Simon Rivier; Valentin Petrov; Uwe Griebner; Alberto García-Cortés; María-Dolores Serrano; Concepción Cascales; Carlos Zaldo
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Paper Abstract

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.

Paper Details

Date Published: 16 April 2008
PDF: 8 pages
Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69980X (16 April 2008); doi: 10.1117/12.780584
Show Author Affiliations
Andreas Schmidt, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Simon Rivier, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Valentin Petrov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Uwe Griebner, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Alberto García-Cortés, Instituto de Ciencia de Materiales de Madrid (Spain)
María-Dolores Serrano, Instituto de Ciencia de Materiales de Madrid (Spain)
Concepción Cascales, Instituto de Ciencia de Materiales de Madrid (Spain)
Carlos Zaldo, Instituto de Ciencia de Materiales de Madrid (Spain)


Published in SPIE Proceedings Vol. 6998:
Solid State Lasers and Amplifiers III
Jonathan A. Terry; Thomas Graf; Helena Jelínková, Editor(s)

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