Phase-change optical disc of 20-GB capacity using NRZI+, Turbo coding with blue laser

Takanori Kishida; Toshitaka Kuma; Kenji Asano; Satoshi Sumi; Shuichi Ichiura

doi:10.1117/12.532424

16 September 2003 Phase-change optical disc of 20-GB capacity using NRZI+, Turbo coding with blue laser

Takanori Kishida, Toshitaka Kuma, Kenji Asano, Satoshi Sumi, Shuichi Ichiura

Proceedings Volume 5069, Optical Data Storage 2003; (2003) https://doi.org/10.1117/12.532424
Event: Optical Data Storage 2003, 2003, Vancouver, Canada

Abstract

Recently, there has been much research on high-density recording of phase change optical disc using blue laser. In most research, RLL (Run Length Limited) modulation such as (1,7) RLL and EFM (Eight to Fourteen Modulation) modulation is used for high-density recording and channel clock regenerating. NRZI (Non Return to Zero Inverse) modulation has a wider window width than other modulation methods. This is a superior characteristic for achieving a high-density recording system of optical disc. We introduced NRZI+ modulation to suppress the low frequency components. And we obtained a result of a bER (bit Error Rate) of less than 1×10^-4 at a bit length of 0.13μm using Turbo coding with an objective lens of NA 0.7 and a blue laser of 405 nm wavelength. This result shows that a recording capacity of 20 GB is feasible using NRZI modulation.

Citation Download Citation

Takanori Kishida, Toshitaka Kuma, Kenji Asano, Satoshi Sumi, and Shuichi Ichiura "Phase-change optical disc of 20-GB capacity using NRZI+, Turbo coding with blue laser", Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); https://doi.org/10.1117/12.532424

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