Dual-wavelength self-Q-switched Nd:GYSGG laser

Abstract

A dual-wavelength self-Q-switched operation of Nd:GYSGG laser with different output couplers is proposed and demonstrated. In self-Q-switched operation, two laser lines between 1056.86 nm and 1060.23 nm were found. Under the pump power of 4 W, the shortest pulse width of 2.02 μs was obtained with a maximum average output power of 565 mW and the optical conversion efficiency of 14.13%. The pulse repetition rate and single pulse energy were 50.2 kHz and 11.25 μJ, respectively. The system is very stable and suitable for generation of multi-wavelength pulses.

High Power Self-Q-Switching in Nd:LuAG Laser

“…The pulse energy was 11.98 μJ and the corresponding peak-power was 20.15 W. The optical spectrum of the SQS operation at the pump power of 21.32 W is shown in Figure 5 in which the central wavelength was located at 1064.65 nm. It should be noted that, unlike the previous researches [21,22], the spectrum centered at the single location. By the way, during our experiment, an output coupler with the transmission of 6% was also adopted to observe the SQS operation.…”

“…In 2014, Xu et al achieved SQS operation from a Yb: CGB laser in which pulse width of 287 ns at 35 kHz were generated with the two central wavelengths of 1052.6 nm and 1057.7 nm, while the highest output power was 416 mW [21]. Another dual-wavelength SQS laser was reported by Song et al using a Nd: GYSGG crystal, having the pulse width of 2.02 μs, the repetition rate of 50.2 kHz, and the operating central wavelengths of 1056.86 nm and 1060.23 nm [22]. Liu et al reported their SQS pulses from the Yb: KGd(WO4)2 system at ~1044 nm.…”

Laser Performance of Neodymium- and Erbium-Doped GYSGG Crystals

“…However, the poor physical and optical properties of these premature materials have severely limited their performance for loss modulation in the Nd:GYSGG laser cavity. Song et al also observed dual-wavelength self-Q-switching in Nd:GYSGG [22], which might be caused by the nonlinear loss induced by the time-dependent thermal lensing effect in the laser crystal.…”

Q‐switched Nd:YVO4 laser with TiS2 saturable absorber

“…Carbon nanotubes could not be used as a broadband SA due to the fixed diameter 9–11 . The modulation depth of graphene is not high 12–14 . Recently, graphene‐like two‐dimensional (2D) materials attracted the attention of researchers 15–18 .…”

“…[9][10][11] The modulation depth of graphene is not high. [12][13][14] Recently, graphene-like two-dimensional (2D) materials attracted the attention of researchers. [15][16][17][18] According to previous works, many 2D materials were used as SAs in fiber and solid-state lasers.…”