title: Littrow-type external-cavity blue laser for holographic data storage.
abstract: An external-cavity laser with a wavelength of 405 nm and an output of 80 mW has been developed for holographic data storage. The laser has three states: the first is a perfect single mode, whose coherent length is 14 m; the second is a three-mode state with a coherent length of 3 mm; and the third is a six-mode state with a coherent length of 0.3 mm. The first and second states are available for angular-multiplexing recording; all states are available for coaxial multiplexing recording. Due to its short wavelength, the recording density is higher than that of a 532 nm laser.
authors.affiliation: Tera Bytes Memory Development Department, Core Technology Development Group, Sony Corporation, Kitashinagawa-ku Tokyo, Japan. tomiji.tanaka@jp.sony.com
authors.forename: Tomiji
authors.initials: T
authors.lastname: Tanaka
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takahashi
authors.forename: Kageyasu
authors.initials: K
authors.lastname: Sako
authors.forename: Ryo
authors.initials: R
authors.lastname: Kasegawa
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Toishi
authors.forename: Kenjiro
authors.initials: K
authors.lastname: Watanabe
authors.forename: David
authors.initials: D
authors.lastname: Samuels
authors.forename: Motonobu
authors.initials: M
authors.lastname: Takeya