Continuous-wave green thin-disk laser at 524 nm based on frequency-doubled diode-pumped Yb:GSO crystal

Abstract

We report what is believed to be the first demonstration of diode-pumped continuous-wave (CW) thin-disk Yb3+-doped Gd2SiO5 (Yb:GSO) laser at 1048 nm. With a 3.8% output coupler, the maximum output power is 1.38 W under a pump power of 17.8 W. Moreover, intracavity second-harmonic generation (SHG) has also been achieved with a power of 337 mW at 524 nm by using a LiB3O5 (LBO) nonlinear crystal. At the output power level of 337 mW, the green power stability is better than 5% and the ellipticity of spot is 0.97.

High-power, fiber-pumped, picosecond green source based on BiB3O6

“…The generation of ultrashort laser pulses in the visible, particularly the green, has always been of great interest, owing to its vast potential for industrial and scientific applications [2], including pumping of ultrafast optical parametric oscillators [3]. In the absence of suitable laser gain media, the development of high-power green sources over the past 50 years has relied almost exclusively on SHG in various birefringent [4][5][6][7][8][9][10] and quasi-phase-matched (QPM) [11] nonlinear materials. Although QPM nonlinear crystals such as periodically poled KTiOPO 4 and MgO-doped stoichiometric LiTaO 3 , with high nonlinearity (d eff ∼ 9 pm V −1 ) and long interaction lengths up to 30 mm, have been successfully deployed in single-pass configuration to generate high-power single-frequency green radiation in the continuous-wave (cw) regime [12][13][14], the narrow spectral acceptance bandwidth for SHG (∼0.25 nm • cm) limits the useful interaction length, precluding their use in the ultrafast regime, where large spectral bandwidths are involved.…”

Passive mode-locking Yb3+:Sc2SiO5 laser at 1040 nm with SESAM

“…In addition, Yb 3+ doped media have broader absorp tion spectrum and broader emission bandwidths. The Yb 3+ doped oxy orthosilicates crystals have been real ized to exhibit excellent broadband performance, large ground state splitting and high thermal conduc tivity [3][4][5][6][7]. Efficient mode locked laser operations have already been demonstrated in numerous of Yb 3+ doped materials [8][9][10][11][12][13][14][15][16].…”

Dual-wavelength mode-locked Yb:LuYSiO5 laser with a double-walled carbon nanotube saturable absorber

“…Yb 3+ doped crystals are highly suitable for use as gain media for ultrafast lasers. Until now, various diode pumped Yb-doped continuous-wave and ultrafast lasers have been demonstrated [27][28][29][30]. A promising ytterbium-doped alloyed oxyorthosilicate crystal Yb:LuYSiO 5 (Yb:LYSO) exhibits combined advantages of both Yb:LSO and Yb:YSO crystals, such as large ground-state splittings, broad absorption and emission spectra and excellent mechanical property.…”