Title :
Radially polarized light generation using segmented spirally varying retarder
Author :
Lai, W.J. ; Tiaw, K.S. ; Lim, B.C. ; Teo, H.H. ; Hong, M.H. ; Phua, P.B.
Author_Institution :
Temasek Labs., Nanyang Technol. Univ., Singapore
Abstract :
We transform a linearly polarized Gaussian beam into a radially polarized doughnut beam using an eight-segment spirally varying retarder (SVR) at wavelength of 808 nm, and obtain > 96% of polarization purity at far field distribution. The SVR is designed based on the linear birefringence of alpha-barium borate (alpha-BBO) crystal and fabricated using a dry etching technique.
Keywords :
barium compounds; birefringence; etching; laser beams; optical fabrication; optical materials; optical polarisers; optical retarders; BBO; Gaussian beam; alpha-barium borate crystal; doughnut beam; dry etching technique; linear birefringence; optical fabrication; polarization purity; radially polarized light generation; segmented spirally varying retarder; wavelength 808 nm; Birefringence; Drives; Dry etching; Fabrication; Liquid crystals; Optical interferometry; Optical polarization; Optical retarders; Silicon; Spirals;
Conference_Titel :
PhotonicsGlobal@Singapore, 2008. IPGC 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-3901-0
Electronic_ISBN :
978-1-4244-2906-6
DOI :
10.1109/IPGC.2008.4781504
