Chinese Optics Letters, Vol. 18, Issue 2, 020902 (2020)
Real-time electroholography using a single spatial light modulator and a cluster of graphics-processing units connected by a gigabit Ethernet network
Hiromi Sannomiya1, Naoki Takada2,*, Tomoya Sakaguchi1, Hirotaka Nakayama3, Minoru Oikawa2, Yuichiro Mori2, Takashi Kakue4, Tomoyoshi Shimobaba4, and Tomoyoshi Ito4
- 1Graduate School of Integrated Arts and Sciences, Kochi University, Kochi, Kochi 780-8520, Japan
- 2Research and Education Faculty, Kochi University, Kochi, Kochi 780-8520, Japan
- 3National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
- 4Graduate School of Engineering, Chiba University, Chiba, Chiba 263-8522, Japan
Systems containing multiple graphics-processing-unit (GPU) clusters are difficult to use for real-time electroholography when using only a single spatial light modulator because the transfer of the computer-generated hologram data between the GPUs is bottlenecked. To overcome this bottleneck, we propose a rapid GPU packing scheme that significantly reduces the volume of the required data transfer. The proposed method uses a multi-GPU cluster system connected with a cost-effective gigabit Ethernet network. In tests, we achieved real-time electroholography of a three-dimensional (3D) video presenting a point-cloud 3D object made up of approximately 200,000 points.