134-μm Nd:YVO_4 laser mode-locked by SHG-lens formation in periodically-poled stoichiometric lithium tantalate

Abstract

Self-starting, steady-state χ((2))-lens mode-locking of a 1.34-μm diode-pumped Nd:YVO(4) laser using intracavity second harmonic generation in PPMgSLT is demonstrated. Pulses as short as 3.6 ps with an average output power of ~1 W are obtained at a repetition rate of 120 MHz.

Engineered quasi-phase-matching for laser techniques [Invited]

“…A high average power of about 1 W and a short pulse duration of 3.6 ps were simultaneously obtained from this passively mode-locked 1.34 μm diode-pumped laser source. Figure 18 shows a typical autocorrelation trace of passively mode-locked pulses with optical superlattice, which is selected from [156].…”

Picosecond laser with 11W output power at 1342nm based on composite multiple doping level Nd:YVO4 crystal

“…Remarkable progress has been made over the past decade in power and energy scaling of CW [1][2][3][4], Q-switched [5,6] and mode-locked [7][8][9][10][11] lasers operating at 1342 nm wavelength.…”

“…Mode-locking by periodically poled (PP) LiNbO 3 frequency doubling nonlinear mirror [8] provides 9.5 ps pulses at 101 MHz with output power of 1.5 W and beam propagation factor of M 2 $ 2.3. Even shorter 3.6-6.9 ps mode-locked pulses with an output power of 0.8-1.05 W at 120 kHz demonstrated [9] by frequency doubling negative lens in PP MgSLT crystal. The output power of 2.19 W and pulse with of 8.6 ps is obtained [10] at 63 MHz from the passively mode-locked Nd:YVO 4 dual end-pumped configuration ensured 7.63 W output power and M 2 $ 1.5 from SSA mode-locked laser [11] with pulse with of $24 ps at 77 MHz.…”

“…Despite the hope for average and peak power scaling reported in Refs. [7][8][9][10][11] mode locked Nd:YVO 4 lasers at 1342 nm wavelength remain unsuitable for efficient materials ablation.…”

Diode-pumped 1988-nm Tm:YAP laser mode-locked by intracavity second-harmonic generation in periodically poled LiNbO_3

“…When QPM materials are used as intracavity frequency-doubling crystals, it is feasible to realize mode locking at any wavelength in the nonlinear crystal's transparent spectral range, especially for those lasers working at wavelengths where no SESAMs exist. Up to now, intracavity frequency-doubled mode locking using QPM materials has been reported at 1.064 μm [27] and 1.3 μm [28,29]; however, as far as we know, there are no reports on the realization of mode locking at around 2 μm using this scheme. In this Letter, we demonstrated, for the first time to our knowledge, a diode-pumped Tm:YAP ultrafast laser operating at 1988 nm based on the CSM scheme.…”