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

Abstract

Efficient and compact blue laser output at 468 nm is generated by intracavity frequency doubling of a continuouswave (CW) diode‐pumped Nd:CNGG laser at 935 nm. With 17.8 W of diode pump power and the frequency‐doubling crystal BiB3O6 (BiBO), a maximum output power of 490 mW in the blue spectral range at 468 nm has been achieved, corresponding to an optical‐to‐optical conversion efficiency of 2.8%; the output power stability over 4 h is better than 2.6%. To the best of our knowledge, this is first work on intracavity frequency doubling of a diode pumped Nd:CNGG laser at 935 nm. (© 2011 by Astro Ltd., Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA) (© 2011 by Astro Ltd., Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA)

Continuous-wave and passively Q-switched laser of Nd:LGGG crystal at 0.93 μm

“…4a, in which two wavelengths laser emission could be found with centers at 933.0 and 936.8 nm, respectively. This was different from that obtained with Nd:GGG, Nd:GAGG, Nd:CNGG, and Nd:CLNGG crystals, where only one emission was observed for CW operation [19][20][21][22]. It was further found that the two wavelength lasers had almost the same thresholds and were all unpolarized.…”

Diode-pumped Nd:LGS laser emitting at 888 nm

“…The other way is to develop lasers emitting at the lowest wavelength possible in the near infrared [2] and to perform nonlinear conversion. Various solid lasers in blue spectra range [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] have been obtained by nonlinear conversion of the transi tion of solid lasers [18][19][20][21][22][23][24][25][26][27]. These blue lasers are effi cient and powerful, nevertheless their wavelengths are too high compared to the 442 nm He-Cd laser.…”

Efficient diode-end-pumped Yb:CaNb2O6 thin-disk laser at 1003 nm and second-harmonic generation for an emission at 501.5 nm

“…In particular, diode-pumped solidstate laser systems have been established as an efficient and compact light source for these applications. By frequency doubling the radiation from Nd 3+ lasers, one can generate blue, green, and red radiation, and by implementing the technique of intracavity doubling, one can achieve high conversion efficiencies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Secondary optical fre-quency references based on visible lasers locked on iodine hyperfine absorption lines have made a real breakthrough with the development of frequency doubled diode-pumped Nd 3+ lasers at 532 nm [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”