AI Article Synopsis
- * It achieved extremely short laser pulses, measuring 40 femtoseconds (fs) with a 31-nm spectrum, and tunable output across 20 nm at 15 mW.
- * The results demonstrate that Yb(3+):CaGdAlO(4) lasers produce some of the shortest pulses for diode-pumped lasers, showcasing their high performance capabilities.
Article Abstract
We report the results of the investigation on a passively mode-locked Yb(3+):CaGdAlO(4) laser, pumped by a single transverse mode laser diode emitting 350 mW at 980 nm. This particular pump source allows efficient pumping with a nearly TEM(00) beam and minimal thermal load, making the optimization of the mode-locking performance more straightforward than with higher-power multimode beams. Indeed, using a semiconductor saturable absorber mirror and extra-cavity dispersion compensation, pulses as short as 40 fs (31-nm spectrum) have been measured, tunable across 20 nm with 15-mW output power. Slightly longer Fourier-limited 46-fs pulses with 33 mW output power directly from the oscillator have been achieved, using a different saturable absorber mirror. Such overall performance, especially considering these are among the shortest pulses generated in diode-pumped ytterbium lasers, confirms the excellent qualities of Yb(3+):CaGdAlO(4).
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| http://dx.doi.org/10.1364/OE.20.010077 | DOI Listing |
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