This work demonstrates the electrical tuning of laser beam shape using an axially symmetric dye-dope liquid crystal (ASDDLC) device that is fabricated using a photo-alignment method. Various beam shapes can be obtained by linearly polarized Gaussian laser beams through an ASDDLC device under various applied voltages. The far-field intensity patterns generated by laser beams of selected shapes under various applied voltages are simulated, and the results are consistent with experiment. A rotatable petal-shaped beam is obtained by controlling the polarization of the output donut-shaped beam. The tenability of beam shape of light with a wavelength of 1064 nm, which is commonly used in biomedical applications, is also demonstrated.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: October 21, 2011
Revised Manuscript: December 23, 2011
Manuscript Accepted: December 30, 2011
Published: March 29, 2012
Shih-Wei Ko, Tsung-Hsien Lin, Yao-Han Huang, Hung-Chang Jau, Shu-Chun Chu, Yan-Yu Chen, and Andy Y.-G. Fuh, "Electrical control of shape of laser beam using axially symmetric liquid crystal cells," Appl. Opt. 51, 1540-1545 (2012)