Practically all Rare Earths ions may be injected into YLF lattice. Maximal possible concentration is different for different Rare Earths. For example Y may be 100% replaced with Yb or La, 50% - with Er, for Nd reachable concentration is to 1.5%.
     Pattern wavelengths are:
           Nd:YLF           1.047 µm, 1.053 µm, 1.313 µm, 1.324 µm and 1.370 µm
          Er:YLF           0.85 µm and 2.81 µm
          Ho:YLF           0.75 µm and 2.06 µm
          Tm:YLF           0.435 µm, 1.89 µm and 2.30 µm
     Nd:YLF (Nd:LiYF4) offers an alternative to the more common YAG host for near IR operation. The combination of weak thermal lensing (19 times lower than that of YAG), large fluorescence line width and naturally polarized oscillation makes Nd:YLF an excellent material for CW, modelocked operation. 1.053 µm output of Nd:YLF matches gain curves of Nd:Glass and performs well as an oscillator and pre-amplifier for this host. YLF is grown utilizing the modified Czochralsky technique. The as-grown crystals are then processed into laser rods or slabs, coated in house, and inspected per customer specifications. Long crystals for lamp pumping with concentration to 1.1 atom % and short elements for diode pumping with concentration to 1.5 atom % can be grown.
     The Er:YLF, Ho:YLF and Tm:YLF single crystal rods are designed to be applied in solid-state lasers which are widely used for industrial, medical and scientific applications. Pure YLF crystals are transparent within the spectrum band of 0.12 - 7.5 µm, photo-, thermo- and radiation-resistant. The YLF crystals have low values of non-linear refraction index and thermooptical constants.

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