Frequency-doubled DBR-tapered diode laser for direct pumping of Ti:sapphire lasers generating sub-20 fs pulses.
Frequency-doubled DBR-tapered diode laser for direct pumping of Ti:sapphire lasers generating sub-20 fs pulses.
复制标题
倍频 DBR 锥形二极管激光器，用于直接泵浦钛蓝宝石激光器，产生低于 20 fs 的脉冲。
作者：
A. Müller;O. B. Jensen;A. Unterhuber;T. Le;A. Stingl;K. Hasler;B. Sumpf;G. Erbert;P. Andersen;P. Petersen
首次展示了一种适用于泵浦钛蓝宝石激光器的单通倍频双dbr锥形二极管激光器，可产生超短脉冲。当泵浦功率为1.2 W时，Ti：蓝宝石激光器的最大输出功率分别为110 mW（连续波）和82 mW（锁模）。这相当于将光转换效率降低到商用二极管泵浦固体激光器的75%。然而，二极管激光器优越的电光效率使钛蓝宝石激光器的整体效率提高了2倍。用二极管激光器泵浦后，Ti：蓝宝石激光器的光谱宽度为112 nm （FWHM）。基于自相关测量，可以预期脉冲宽度小于20秒。
For the first time a single-pass frequency doubled DBR-tapered diode laser suitable for pumping Ti:sapphire lasers generating ultrashort pulses is demonstrated. The maximum output powers achieved when pumping the Ti:sapphire laser are 110 mW (CW) and 82 mW (mode-locked) respectively at 1.2 W of pump power. This corresponds to a reduction in optical conversion efficiencies to 75% of the values achieved with a commercial diode pumped solid-state laser. However, the superior electro-optical efficiency of the diode laser improves the overall efficiency of the Ti:sapphire laser by a factor > 2. The optical spectrum emitted by the Ti:sapphire laser when pumped with our diode laser shows a spectral width of 112 nm (FWHM). Based on autocorrelation measurements, pulse widths of less than 20 fs can therefore be expected.