Nd-doped yttrium lithium fluoride (Nd:YLF) crystal 3-ND11YLF

opticallaser

Doping concentration 0.4 2.0 atm. % Dimensional tolerances +0/-0.05 mm Extinction Ratio >25 dB Length tolerance ±0.1 mm Surface quality 10-5 S-D Surface flatness <λ/10 @ 632.8 nm Transmitted wavefront distortion up to λ/8 @ 632.8 nm Parallelism error <10 arcsec Perpendicularity <10 arcmin Protective chamfers <0.1 mm x 45° Nd:YLF (more precise formula is Nd:LiYF4) emission wavelengths are 1053, 1047, 1313, 1324, and 1370nm. It is laser material alternative to Nd:YAG . Main Nd:YLF advantage over Nd:YAG is higher pulse energy at low (<2kHz) repetition rate. Other differences are also worth to mention: weak thermal lensing, relatively broad fluorescence linewidth and naturally polarized oscillation. Altechna provides Nd:YLF crystals which are selected to have low inhomogeneity over all aperture. Crystals with diameter 10mm, length 120mm and inhomogeneity ~ 0.1-0.3 * 10-5 are available.