All-solid-state cw frequency-doubling Nd:YLiF_4/LBO blue laser with 433 W output power at 454 nm under in-band diode pumping at 880 nm

Abstract

We generated efficient blue laser output at 454 nm by intracavity frequency doubling of a continuous-wave (cw) diode-pumped Nd:YLiF(4) (Nd:YLF) laser at 908 nm based on the (4)F(3/2)-(4)I(9/2) transition. With 32.8 W of incident pump power at 880 nm and the frequency-doubling crystal LiB(3)O(5), a level as high as 4.33 W of cw output power at 454 nm is achieved, corresponding to an optical conversion efficiency of 13.2% with respect to the incident pump power. To the best of our knowledge, this is the first blue laser at 454 nm generated by intracavity frequency doubling of a diode-pumped Nd:YLF.

Diode-pumped CW frequency-doubled Nd:CNGG-BiBO blue laser at 468 nm

“…Classical wavelengths of frequency-doubled DPSS blue lasers are 473 nm (Nd:YAG laser) [10,11], 0.46 μm (Nd:vanadate lasers) [12][13][14][15][16]. The lowest wavelengths ever reported with DPSS lasers based on Nd ions are 454 nm with Nd:YLF and 453 nm with Nd:ASL [17,18] and recently 440 nm in Nd:YVO 4 and Nd:GdVO 4 [19][20][21]. The Nd-doped Nd:CNGG crystal, which belongs to the class of Nd-doped disordered laser materials, is an attractive gain medium suitable for diode pumping [22].…”

Actively Q-switched Nd:YLF laser emitting at 908 nm

“…Compared with the widely used four-level Nd-doped crystal lasers, the corresponding quasi-three-level lasers have the ability of emitting considerably shorter wavelength around 0.9 µm, which can be applied in laser communication, laser remote sensing, differential absorption lidar for ozone detection, laser satellite work, and water vapor lidar [1,2]. Moreover, these 0.9 µm lasers are also employed to pump Yb-doped fiber or crystal lasers [2], to drive intra-cavity Raman lasers [3], and to achieve laser output in the blue spectral region by frequency doubling [4,5] and sum frequency of the fundamental and Raman laser [3]. Therefore, the quasi-three-level lasers emitting around 0.9 µm have been extensively investigated in the past few years, such as the research reported by Neto [6].…”

Efficient Nd:Y0.5Gd0.5VO4-KTiOPO4 green laser under diode pumping into the emitting level 4 F 3/2

“…Lasers emitting in the visible range are useful in many fields, such as medicine, lithography, communi cations, display or biology [1][2][3][4][5][6][7][8][9][10][11][12][13]. In past few years, new solid sate lasers were designed to enlarge the panel of wavelengths [14][15][16][17][18][19][20][21][22][23][24][25].…”