High-power picosecond Nd:GdVO_4 laser mode locked by SHG in periodically poled stoichiometric lithium tantalate

Abstract

Periodically poled stoichiometric lithium-tantalate is used for mode locking of a diode-pumped Nd:GdVO(4) laser by intracavity second-harmonic generation. Stable and self-starting operation is observed achieving average output powers of up to 5 W at a pulse-repetition rate of 107 MHz. The obtained pulse durations range from 6.5 ps at maximum output power down to 3.2 ps at 1.4 W.

χ(2)-Lens Mode-Locking of a Nd:YVO4 Laser with High Average Power and Repetition Rate up to 600 MHz

“…The average power in ML is close to the maximum achievable in continuous-wave (CW) operation. This behavior is typical for χ (2) -lens mode-locked lasers [4,5]. The pulse duration (FWHM) is 6.1 ps, derived from the measured autocorrelation curve, assuming sech 2 -pulse shape (Fig.…”

“…Moreover, the residual absorption of SESAMs can lead to heating or thermal damage of the absorber, especially for operation at high intra-cavity power and high repetition rate. As an alternative to SESAMs, χ (2) -lens mode-locking has been demonstrated with Nd:YVO 4 and Nd:GdVO 4 lasers emitting output power of several watts with transform-limited pulses [4,5]. In rhis technique two physical processes govern the mode-locking operation: resonator intensity dependent loses due to intra-cavity χ (2) -lens formation and soliton-like pulse shaping due to negative intra-cavity self-phase modulation introduced by phase mismatched SHG.…”

High peak power sub-nanosecond mode-locked pulse characteristics of Nd:GGG laser

“…In ultra-short pulse laser application fields, such as laser measurement, laser spectrum, nonlinear optics, biological medicine, micromachining process and so on [1][2][3][4], the pulse width and the repetition rate are very important parameters because they decide the dynamical process of the inter-reaction between laser and materials. The peak power and the stability are the other key parameters for ultra-short pulse laser because high peak power and high stability can meet the needs of laser applications.…”

Nd:LuVO4 Laser Passively Mode-Locked by χ(2)-Lens Formation in Periodically-Poled Stoichiometric Lithium Tantalate

“…Nowadays, improvements in the growth technology make crystals of Nd:LuVO4 available in dimensions and laser quality that are comparable with those of Nd:YVO4. In this work we apply PPMgSLT for mode-locking of a Nd:LuVO 4 laser where the modelocking mechanism is based on χ (2) -lens formation assisted by the frequency-doubling nonlinear mirror (FDNLM) effect, a hybrid technique recently developed and demonstrated in Nd:YVO 4 [4] and Nd:GdVO 4 [5] lasers with PPKTP and PPMgSLT nonlinear crystals, respectively.…”