Combination of free-space and guided-wave optical interconnects for angularly multiplexed multiwavelength holographic...

Area of Science:

• Optoelectronics
• Holographic data storage
• Materials science

Background:

• Holographic memory offers high storage density.
• Efficient methods for spatial multiplexing are crucial for practical holographic memory systems.
• Integrating guided-wave and free-space optics presents unique challenges.

Purpose of the Study:

• To propose and experimentally validate a new scheme for spatially multiplexed multiwavelength holographic memory.
• To investigate the use of an electro-optically modulated phase grating array as a guided-wave interconnect.
• To demonstrate the combined use of guided-wave and free-space interconnects in holographic memory.

Main Methods:

• Utilized an electro-optically modulated phase grating array on a LiNbO(3) substrate for guided-wave interconnects.
• Employed a free-space interconnect for the object beam.
• Implemented angle-multiplexing using reference beams with different diffraction angles.
• Achieved electro-optic modulation efficiency of 18 +/- 2.5% at 100 V.

Main Results:

• Successfully implemented a novel scheme for spatially multiplexed holographic memory.
• Demonstrated the functionality of the guided-wave electro-optic interconnect for reconfigurable reference beams.
• Achieved efficient electro-optic modulation, crucial for device performance.
• Showcased angle-multiplexing capabilities for holographic recording.

Conclusions:

• This work presents the first reported implementation of a hybrid guided-wave and free-space interconnect system for holographic memory.
• The developed system offers a promising approach for advanced holographic data storage solutions.
• The experimental validation confirms the feasibility and efficiency of the proposed scheme.