'A' cited 'B'.

'A'
Title: Tunable blue laser compensates for thermal expansion of the medium in holographic data storage
Author(s): Tanaka T (Tanaka, Tomiji), Sako K (Sako, Kageyasu), Kasegawa R (Kasegawa, Ryo), Toishi M (Toishi, Mitsuru), Watanabe K (Watanabe, Kenjiro)
Source: APPLIED OPTICS 46 (25): 6263-6272 SEP 1 2007
Authors' address:
Sony Corp, Core Technol Dev Grp, Tera Bytes Memory Dev Dept, Shinagawa Ku, Tokyo 1410001, Japan

'B'
Title: Photopolymer holographic grating for a high-resolution tunable demultiplexer
Author(s): Chung SH, Han SH, Kim T, Lee B
Source: IEEE PHOTONICS TECHNOLOGY LETTERS 17 (3): 597-599 MAR 2005