A photorefractive beam splitter (PRBS) is introduced as an alternative to a polarizing beam splitter (PBS) for coupling optical power into reflective modulators in a free-space optical interconnection system. The PRBS uses a single diffraction grating recorded in a photorefractive material to redirect the incident laser light into the first diffraction order and onto the modulators. Reflected interconnection light not matching the Bragg angle criteria transmits uncoupled through the beam splitter. Experimental results show that the PRBS provides better, more uniform transmission for off-axis beams than the currently used PBS.
© 1998 Optical Society of America
Original Manuscript: January 29, 1998
Revised Manuscript: June 24, 1998
Published: September 10, 1998
D. Scott Gardner, Philippe J. Marchand, Phil Harvey, W. Lee Hendrick, and Sadik C. Esener, "Photorefractive beam splitter for free-space optical interconnections," Appl. Opt. 37, 6178-6181 (1998)