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5771703 
Journal Article 
Generation of 656 nm coherent red-light by frequency-doubled Nd:YLiF sub(4)/ beta -BaB sub(2)O sub(4) laser for a compact silver atoms optical clock 
Loisel, JP; Topsu, S; Chassagne, L; Alayli, Y; Dahoo, PR; Juncar, P 
2012 
3 
1 
7-13 
We describe an efficient continuous-wave diode-pumped Nd:YLiF sub(4) laser oscillating on the [sigma]-polarized super(4)F sub(3/2)- super(4)I sub(13/2) transition at lambda [omega] = 1312 nm. With a simple linear cavity laser, we reached an intracavity power of 310 W at lambda = 1312 nm for 16 W of absorbed pump power ( lambda p ~ 806 nm). A 0.25 W of tunable radiation ( lambda sub(2)[omega] = 656-658 nm) was obtained by intracavity second-harmonic generation (SHG) with a 5 5 7 mm super(3) beta -BaB sub(2)O sub(4) crystal. Up to 10 mW of tunable single-frequency operation was observed using a 200 mu m thin fused silica intracavity solid etalon. The optimal waist for a maximum conversion efficiency has been calculated theoretically using Boyd and Kleiman model. For the 1312-656 nm SHG, we found a walk-off parameter B = 8.99 and an optimal waist of 25 mu m. Comparing to the experimental measurement of the optimal waist, we found a relative discrepancy of 2.84 10 super(-2). This laser is dedicated to the spectroscopic study of silver atoms trapped in a buffer-gas-free paraffin coated Pyrex cell that will be used in a compact atomic optical clock. 
Toxicology Abstracts; Cavities; Crystals; Paraffin; X 24390:Radioactive Materials