High Density Near-Field Optical Disc System

Masataka Shinoda; Kimihiro Saito; Tsutomu Ishimoto; Ariyoshi Nakaoki; Masanobu Yamamoto; Osamu Maeda; Toshihiro Hashizu; Takeharu Asano; Keigo Aga; Katsuji Takagi; Minoru Tazoe

doi:10.1364/ISOM_ODS.2005.WD1

International Symposium on Optical Memory and Optical Data Storage
OSA Technical Digest Series (Optica Publishing Group, 2005),
paper WD1
•https://doi.org/10.1364/ISOM_ODS.2005.WD1

High Density Near-Field Optical Disc System

Masataka Shinoda, Kimihiro Saito, Tsutomu Ishimoto, Ariyoshi Nakaoki, Masanobu Yamamoto, Osamu Maeda, Toshihiro Hashizu, Takeharu Asano, Keigo Aga, Katsuji Takagi, and Minoru Tazoe

International Symposium on Optical Memory and Optical Data Storage 2005

Honolulu, Hawaii United States
10–14 July 2005
ISBN: 1-55752-794-6

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M. Shinoda, K. Saito, T. Ishimoto, A. Nakaoki, M. Yamamoto, O. Maeda, T. Hashizu, T. Asano, K. Aga, K. Takagi, and M. Tazoe, "High Density Near-Field Optical Disc System," in International Symposium on Optical Memory and Optical Data Storage, OSA Technical Digest Series (Optica Publishing Group, 2005), paper WD1.

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Abstract

Current status on near - field recording / readout systems using Solid Immersion Lens (SIL) is reported. Our system employing a SIL of 1.84 NA and a Laser Diode (LD) of 405 nm wavelength has realized the capacity to 112 GB in a 12 cm - diameter phase - change disc along with the write-power margin of +/-11.2 % and the data transfer rate of 36 Mbps. Key technologies are summarized in this paper. As a recent achievement on our near - field optical disc system, we present a result of a 1.84 - NA dual-channel near-field recording/readout by using a monolithic dual-beam LD with 412 nm wavelength.

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