Millijoule Q-switched Nd:YAG laser operating at 946 nm

Abstract

Abstract:Quasi three-level laser operation of Nd:YAG at 946 nm is reported. Applying an end-pumped configuration pulse energies of more than 2 mJ @ 14 ns at a repetition rate of 10 Hz have been achieved. This output performance corresponds, according to the authors' knowledge, to the highest reported values for such compact passively Q-switched solid-state lasers emitting around 0.9 μm.Pulse length , ns τ p

Enhancement of 1.35 μm fluorescence lifetime of Cr4+-doped YAG crystal by Ytterbium codoping

“…Even the content of the impurity rare earth ions is no more than 10 -5 , but their effect on the fluorescence quenching of Yb 3+ ions can not be neglected. As Yb 3+ ion has an electron configu ration of 4f 13 , so it is more easily to interact with sur rounding ions. And the Yb 3+ ions generally have an upper level energy of about 10000 cm -1 , which is matched to the excited state energy of Er 3+ , Tm…”

“…:YAG) has been widely used as passively Q switched saturable absorber [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Besides, Tet ravalent chromium ion has been recognized as a pop ular and efficient ion for obtaining tunable laser oper ating in the near infrared region (1.2-1.6 µm) [16][17][18][19].…”

Short pulse width UV laser at 355 nm based on pulse LD side-pumped ceramic Nd:YAG and BBO electro-optical Q-switched

“…At present, the using of passive Q switched is to obtain low repetition rate, short pulse width (ns or even ps) laser output one of laser output ways, but by the nature of the saturable absorber own limitations, the output of the fundamental frequency laser only a few mJ pulse energy [19][20][21]. This approach is not conducive to producing high energy SHG laser fre quency.…”

Generation of high-peak power 532-nm green pulses from composite, all-ceramics, passively Q-switched Nd:YAG/Cr4+:YAG laser

“…Thus, using a composite Nd:YAG/Cr 4+ :YAG structure, the Q-switched laser pulse energy at 946 nm was increased at 2 mJ energy, with pulse duration of 14 ns (i.e. ~0.14-MW peak power) [7]. Laser pulses with energy up to E p = 67.3 µJ and peak power of nearly 33 kW were obtained from Nd:YAG/Cr 4+ :YAG composite structures [8,9].…”