Total internal reflection fused-silica grating for splitting polarized femtosecond beams
B. WANG1,*
,
Y. LIa1
Affiliation
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China English Education Center, Guangdong Peizheng College, Guangzhou 510830, China
Abstract
We described a PBS grating based on total internal reflection (TIR) to realize high efficiency. The grating period and depth are optimized using rigorous coupled wave analysis (RCWA) for a femtosecond laser wavelength of 800 nm. Efficiencies can reach unity for both TE-polarized wave in the 0th order and TM-polarized wave in the -1st order. Based on TIR, all the incident energy can be reflected without transmission regardless of grating tooth shape. The presented TIR PBS can stand with high laser power systems without absorptions of metal or complicated structures of multilayer coatings.
Keywords
Diffractive optics, Rigorous coupled-wave analysis, Total internal reflection, Polarizing beam splitter.
Citation
B. WANG, Y. LIa, Total internal reflection fused-silica grating for splitting polarized femtosecond beams, Optoelectronics and Advanced Materials - Rapid Communications, 4, 9, September 2010, pp.1293-1296 (2010).
Submitted at: Aug. 12, 2010
Accepted at: Sept. 15, 2010