HGO grows Pr:YLF laser crystals using Czochralski technology. Pr3+:YLF has been
found as promising laser material for producing visible lasers directly and UV
lasers through intracavity second-harmonic generation. Very few laser materials have the necessary properties for the realization
of lasing in the visible spectral range. Trivalent praseodymium (Pr3+)
is known to be an interesting laser ion for use with solid-state lasers in the
visible spectral range because of its energy levels scheme, providing several
transitions in the red (640 nm, 3P0 to 3F2), orange (607
nm, 3P0 to 3H6), green (523 nm, 3P0 to 3H5), and
dark red (720 nm, 3P0 3F3+3F4) spectral regions.
