One-shot and aberration-tolerable homodyne detection for holographic storage readout through double-frequency grating-based lateral shearing interferometry

Yeh Wei Yu, Shuai Xiao, Chih Yuan Cheng, Ching Cherng Sun

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A simple method to decode the stored phase signal of volume holographic data storage with adequate wave aberration tolerance is highly demanded. We proposed and demonstrated a one-shot scheme to decode a binary-phase encoding signal through double-frequency-grating based shearing interferometry (DFGSI). The lateral shearing amount is dependent on the focal length of the collimated lens and the frequency difference between the gratings. Diffracted waves with phase encoding were successfully decoded through experimentation. An optical model for the DFGSI was built to analyze phase-error induction and phase-difference control by shifting the double-frequency grating longitudinally and laterally, respectively. The optical model was demonstrated experimentally. Finally, a high aberration tolerance of the DFGSI was demonstrated using the optical model.

Original languageEnglish
Pages (from-to)10412-10423
Number of pages12
JournalOptics Express
Volume24
Issue number10
DOIs
StatePublished - 16 May 2016

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