Abstract
An external-cavity laser with a wavelength of and an output of 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 ; and the third is a six-mode state with a coherent length of . 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 laser.
© 2007 Optical Society of America
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