Based on the anisotropy of laser crystal, we demonstrate a method of adjusting laser emission by selecting crystal orientation. When the light propagating direction varies from a to c axis of Nd:LiGd(MoO4)2 crystal, emission wavelength exhibits a sensitive change of 1061 nm → 1061/1062 + 1068 nm → 1068 nm. The experimental discipline is well explained by a theoretical study of simulating on the spatial distribution of stimulated emission cross-section. This letter manifests that the laser property along non-principal-axis direction is also valuable for research and application, which breaks through the traditional custom of using laser materials processed along principal-axis.
Received 23 September 2012Accepted 19 December 2012Published online 11 January 2013
The authors wish to thank Dr. Huaidong Jiang for linguistic advice. This work was supported by the National Natural Science Foundation of China (60978027, 61178060), Program for New Century Excellent Talents in University (NCET-10-0552, NCET-10-0526), and Natural Science Foundation for Distinguished Young Scholar of Shandong Province (2012JQ18).