Formalization and experimental evaluation of cavity-enhanced holographic readout

摘要

We formalize the theoretical effects of optical resonator enhancement on diffraction efficiency, read rate, and write rate of plane wave holograms, with a view toward page based holographic data storage. Trade-offs in cavity enhancement are also examined. Theory predicts ～160% of enhancement in diffraction efficiency is feasible when power loss of the hologram is ～8% and diffraction efficiency is ～8%. We report experimental verification of ～30% enhancement of diffraction efficiency for a hologram written in 0.03% Fe:LiNbO_3 (Deltronic Crystal Industries, Inc.) with a 532 nm wavelength, pulsed, DPSS, Nd-YAG, laser and read by a red He-Ne laser. The Bragg selectivity width under the cavity-enhanced readout is experimentally confirmed to be unaffected by cavity enhancement, and it agrees with theoretical prediction.