[54] OPTICAL WAVEGUIDE GRATING COUPLER DEVICE
[75] Inventor: Hiroshi Sunagawa, Kanagawa, Japan
[73] Assignee: Fuji Photo Film Co., Ltd., Kanagawa, Japan
[21] Appl. No.: 710,983
[22] Filed: Jun. 6, 1991
[30] Foreign Application Priority Data
Jun. 6, 1990 [JP] Japan 2-148397
[51] Int. CI.5 G02B6/34
[52] U.S. CI 385/37; 385/14;
385/130
[58] Field of Search 350/96.11, 96.13, 96.12,
350/96.19, 162.20, 162.22, 162.23, 162.21,
162.24
[56] References Cited
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