Efficient stimulated emissions at an orange wavelength (604 nm) are obtainable from a cryogenically cooled Pr:LiYF4 crystal pumped by a 444 nm pulse laser. The red lasing at 639 nm, which is dominant at room temperature, decreases as the crystal temperature decreases. The orange laser power exceeds the red laser at temperatures lower than 180K. At 2OK, we obtain laser oscillation without an external cavity from a 10-mm-long crystal. Such efficient lasing is ascribed to the substantial absorption reduction at 604 nm at low temperatures. We can also obtain the orange (616 nm) laser from a Pr:Y 3Al5O12(YAG) crystal at < 100 K.
|Number of pages||4|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Publication status||Published - 2007 Feb 8|
- Solid-state laser
- Visible laser
ASJC Scopus subject areas
- Physics and Astronomy(all)