We propose and perform broadband angular filtering with the combination of a volume Bragg grating and a surface grating pair. The condition for broadband operation is discussed. Near-field modulation, contrast ratio, and power spectral density are used to evaluate the filtering performances in the spatial and frequency domain. Experimental results show that the bandwidth of the output beam through the grating combination is remarkably increased, and the medium and high frequencies are effectively eliminated.
© 2014 Optical Society of America
Original Manuscript: January 3, 2014
Revised Manuscript: May 22, 2014
Manuscript Accepted: May 28, 2014
Published: July 2, 2014
Shang Wu, Xiao Yuan, Xiang Zhang, Jiansheng Feng, Kuaisheng Zou, and Guiju Zhang, "Broadband angular filtering with a volume Bragg grating and a surface grating pair," Opt. Lett. 39, 4068-4071 (2014)