Dual-wavelength Nd:YAG crystal laser at 1074 and 1112 nm

Abstract

We reported an efficient laser-diode (LD) end-pumped CW dual-wavelength Nd:YAG crystal laser operating at 1074 and 1112 nm simultaneously, for the first time to our knowledge. The maximum output power was 3.15 W with an optical conversion efficiency of 23.6%. Considering the broad absorption of carbonylhemoglobin and hemoglobin located at about 538 and 555 nm, respectively, we proposed that this dual-wavelength laser is an important source for detecting carbon monoxide poisoning by simple frequency doubling.

Spectroscopy of a Nd:YVO4 diode pumped solid state laser

“…Previously, dual wavelength lasing at 1 074 and 1 112 nm, as well as triple lasing at 946, 1 064, and 1 319 nm 10 were observed in diode pumped neodymium:yttrium aluminum garnet (Nd:YAG) crystal. With its high absorption and emission cross section neodymium:yttrium orthovanadate (Nd:YVO 4 ) is another Nd +3 doped crystal, that is vastly commercialized .…”

Diode-pumped Pr3+:LiYF4 visible dual-wavelength laser

“…So far, dual-wavelength laser for different transitions of Nd 3 þ have been reported for some crystals such as Nd:YAG [6][7][8][9][10][11][12][13][14][15][16][17][18], Nd:YVO 4 [19][20][21][22][23][24][25][26], Nd:GdVO 4 [27][28][29][30][31], Nd:LuVO 4 [32,33], Nd:YAlO 3 [34][35][36][37] Nd:GSAG [38], Nd:LSO [39], Nd:LYSO [40,41], Nd:SYSO [42] and Nd:YAB [43]. However, few researches on dual-wavelength Nd 3 þ -doped lasers in the visible spectral region have been reported [44][45][46].…”

High Brightness 556 nm Laser by Frequency Doubling of a 1112 nm Nd:YAG Laser

“…In the recent years, diode-pumped Nd:YAG lasers operating around 1.1 μm have been applied in various applications such as remote monitoring, chemical testament and, etc. [1]- [6]. The laser at 1112 nm can be applied in selective photo-ionization in laser chemistry [7]- [9], or be used as the pump source for thulium up-conversion fiber lasers.…”

“…After a two-stage doublepass amplifier, the fundamental output power of MOPA laser system was increased up to 78 W. By using a lithium triborate (LBO) as the SHG crystal, the frequency-doubled laser at 556 nm with an average output power of 48 W and a beam quality M 2 of 1.53 was achieved, which corresponds to a SHG conversion efficiency of 61.5% and a brightness of Schematic of the pulse LD pumped Q-switched Nd:YAG laser oscillator at 1112 nm. 6.63 × 10 9 W/cm 2 ·sr. To the best of our knowledge, this is the highest brightness for the laser at 556 nm based on frequency doubling of Nd:YAG laser at 1112 nm.…”