Crosstalk cancellation of differential readout technology for Super-RENS disc system

Wenhua Hu; Xiujian Li; Jiankun Yang; Yongmin Nie

doi:10.1117/12.868320

2 December 2010 Crosstalk cancellation of differential readout technology for Super-RENS disc system

Wenhua Hu, Xiujian Li, Jiankun Yang, Yongmin Nie

Proceedings Volume 7851, Information Optics and Optical Data Storage; 78510X (2010) https://doi.org/10.1117/12.868320
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

The crosstalk reduction of differential readout technology for Super-Resolution Near-field Structure (Super- RENS) disc system is analyzed. We calculate the crosstalk for both differential readout technology and normal readout technology by using scalar diffraction theory. Numerical analyses indicate that the differential readout technique is effective as a mean of crosstalk reduction. Further analyses demonstrate the effects of different Gaussian-weighted beams, defocus and track error on cross-talk ratio for both readout technologies. Simulations show that the wide incident beam is preferable to gain low crosstalk. By comparing the two kinds of readout technologies, we also find that the differential readout technology always obtains higher quality signal.

Citation Download Citation

Wenhua Hu, Xiujian Li, Jiankun Yang, and Yongmin Nie "Crosstalk cancellation of differential readout technology for Super-RENS disc system", Proc. SPIE 7851, Information Optics and Optical Data Storage, 78510X (2 December 2010); https://doi.org/10.1117/12.868320

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KEYWORDS

Error analysis

Data storage

Diffraction

Defense technologies

Near field

Objectives

Tantalum

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