Article

Applied Physics A

, Volume 79, Issue 4, pp 791-794

First online:

Femtosecond laser application for high capacity optical data storage

  • M.H. HongAffiliated withData Storage InstituteDepartment of Electrical and Computer Engineering, National University of Singapore Email author 
  • , B. Luk’yanchukAffiliated withData Storage Institute
  • , S.M. HuangAffiliated withData Storage Institute
  • , T.S. OngAffiliated withData Storage Institute
  • , L.H. VanAffiliated withData Storage Institute
  • , T.C. ChongAffiliated withData Storage InstituteDepartment of Electrical and Computer Engineering, National University of Singapore

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

A femtosecond (fs) laser application for multi-layer optical recording is investigated. Information patterns at different layer depths were written inside a transparent glass substrate due to micro-void formation by fs laser ablation, which causes re-distribution in glass materials and a refractive index modification. The information bits recorded in a single layer can be retrieved clearly without interference from the neighboring layers. A fs laser irradiation of a transparent polymer matrix (doped with fluorescent materials for use as low-cost recording media) is also studied. A fs laser induced photo-chemical reaction changes the chemical properties of the fluorescent materials and records information bits inside the matrix. With an ultra-fast laser as a new light source, 3D optical recording can be available for high capacity data storage up to 1 TB per disc.