HGO grows Tm:YLF
laser crystals using Czochralski technology. Tm:YLF is an important middle
infrared laser crystal. Because Tm:YLF is negative uniaxial crystal, whose
thermal refractive index coefficient is negative, some thermal distortion may
be counteracted and high-quality light can be output. Conveniently pumped at
792nm, 1.9μm linearly polarized beam is output in a axis, and non-linearly
polarized beam is output in c axis. The YLF crystals has low non-linear
refraction index value and thermo optical constants, which makes these crystals
applicable in research, development, education, production, photonics, optic,
laser technology and telecommunications.
Besides, Tm3+:YLF lasers are
ideal pump sources for 2.1 μm Ho3+:YAG lasers. This is due to a good overlap of Tm3+:YLF emission and Ho3+:YAG absorption
spectra and the capacity of producing linearly polarized output. What is more,
the refractive index of Tm3+:YLF decreases with temperature, leading to a negative
thermal lens that is partly compensated by a positive lens effect due to end
face bulging.
